分类目录归档：centrifugal fan

Centrifugal fan application

• ‌Industrial Manufacturing‌: Centrifugal fans are used in many industrial environments, such as ‌steel metallurgy, ‌chemical industry, ‌mining, etc. In these industries, fans are usually used to strengthen air supply, exhaust, refrigeration and hot air systems. Especially in harsh environments such as high temperature, corrosion, dust, etc., centrifugal fans play an irreplaceable role.
• ‌‌Environmental protection equipment‌: Centrifugal fans are also widely used in environmental protection equipment, such as ‌sewage treatment, ‌exhaust gas purification, etc. At the same time, centrifugal fans also play an important role in dust removal equipment, incineration equipment and advanced physical noise reduction equipment.
• ‌Construction Equipment‌: In the construction field, centrifugal fans are used in air conditioning, ventilation, hot air and other fields. Through the air supply and exhaust system, they realize the circulation and flow of air and promote the convection and ventilation of indoor air.
• ‌Temperature control‌: Centrifugal fans can change the ambient temperature by blowing air, so they have important uses in heating, ventilation, air conditioning, drying and other temperature regulation equipment.
• ‌Air purification‌: In special environments such as laboratories, operating rooms and other places that have strict requirements on air quality, centrifugal fans can be used for air filtration and purification.
• ‌Agricultural cultivation‌: In agricultural production, centrifugal fans are used to provide a stable air environment for greenhouse plant growth, animal feeding, etc.
• ‌Transportation equipment‌: In transportation equipment such as trains and ships, centrifugal fans are also used for air circulation.
• ‌‌Food Processing‌: In the food processing industry, centrifugal fans are also very commonly used, such as drying equipment, cooling equipment and other food processing technology equipment.
• ‌Other occasions‌: Centrifugal fans are widely used in heating, fresh air systems, exhaust systems and many other fields.

centrifugal fan application

Centrifugal fan working principle

• The working principle of the centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then rely on centrifugal force to push the gas from the suction side to the discharge side. Specifically, when the impeller rotates, the gas is sucked into the impeller. As the impeller rotates, the gas leaves the impeller in the radial direction under the action of centrifugal force, thereby pushing the gas from the suction end to the discharge end.

The structure and function of centrifugal fans

• The centrifugal fan is mainly composed of impeller, casing, main shaft and coupling. The impeller is the main component that generates wind pressure and transmits energy. The casing is used to introduce and discharge gas. The coupling is used to connect the motor and fan to transmit torque. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

Types of centrifugal fans

• ‌Classification by impeller structure‌:
• ‌Forward centrifugal fan‌: The rotation direction of the impeller is the same as the direction of gas flow, suitable for low flow and high pressure situations.
• ‌Backward centrifugal fan‌: The rotation direction of the impeller is opposite to the direction of gas flow, and it is suitable for high flow and low pressure situations.
• Radial centrifugal fan‌: The impeller blades are arranged in a radial pattern and are suitable for medium flow and medium pressure applications.
• ‌Mixed-flow centrifugal fan‌: combines the characteristics of axial flow and centrifugal fans, and is suitable for medium flow and medium pressure applications.

Classification by use‌:

• ‌Industrial centrifugal fans‌: widely used for ventilation and dust removal in factories, mines, tunnels and other industrial places.
• ‌Household centrifugal fan‌: used for cooling and ventilation in air conditioning equipment and household appliances.
• ‌Special purpose centrifugal fan‌: used for special purposes such as wind tunnel wind source and hovercraft inflation.

centrifugal fan application

Classified by airflow direction‌:

• ‌Unidirectional flow centrifugal fan‌: The air flow has only one inlet and one outlet, suitable for simple ventilation systems.
• ‌Bidirectional flow centrifugal fan‌: With two inlets and two outlets, it is suitable for occasions requiring two-way ventilation.

Classification by driving method‌:

• ‌Electric centrifugal fan‌: driven by an electric motor, suitable for most applications.
• ‌Gas-driven centrifugal fan‌: driven by a gas engine, suitable for occasions without power supply.

Classification by noise control‌:

• ow-noise centrifugal fan‌: Designed with noise control in mind, it is suitable for occasions that require a low-noise environment.
• ‌High Noise Centrifugal Fan‌: Suitable for occasions where noise requirements are not high.

centrifugal fans a price

What are the three types of centrifugal fans?

• Centrifugal fans are divided into three types: static pressure centrifugal fans, dynamic pressure centrifugal fans and diagonal flow centrifugal fans.
• 1.Static pressure centrifugal fan
• Static pressure centrifugal fans are suitable for occasions requiring larger air volume and lower wind pressure, such as ventilation and air conditioning and refrigeration. Their transmission pressure (static pressure) generally does not exceed 2000Pa. Static pressure centrifugal fans can be divided into forward curved plate centrifugal fans, back curved plate centrifugal fans, right angle centrifugal fans and medium pressure centrifugal fans.The front curved plate centrifugal fan has a set of aluminum curved plates in front of the impeller, which allows the gas entering the impeller to flow to the blades, improving energy utilization and achieving higher static pressure and efficiency. The rear curved plate centrifugal fan has a set of aluminum curved plates behind the impeller to better utilize gas energy and improve efficiency. The right-angle centrifugal fan has a wind direction curve of 90 degrees and has high static pressure. It is suitable for air conditioning supply and exhaust systems. Medium-pressure centrifugal fans are suitable for larger gas flows and pressures, and can meet higher system efficiency.
• 2.Dynamic pressure centrifugal fan
• The transmission pressure (static pressure) of dynamic pressure centrifugal fans is usually above 2000Pa, and is suitable for occasions that require higher wind pressure or require long-distance gas transportation, such as industrial production lines, processes, smelting, etc. Dynamic pressure centrifugal fans can be divided into two types: single suction type and double suction type. The single-suction dynamic pressure centrifugal fan has a shorter suction section and is suitable for transporting gases with less dust, such as fresh air supply and return systems. The double-suction dynamic pressure centrifugal fan has a longer suction section and is suitable for conveying dust-containing gas or where both ends need to be connected to pipes.
• 3.Oblique flow centrifugal fan
• The oblique flow centrifugal fan is a new type of centrifugal fan, suitable for large-scale air supply or exhaust situations. Its air volume can reach 600000m³/h and its static pressure can reach 750Pa. The advantages of this type of fan are high efficiency, low noise, large air volume, small and lightweight, and are generally widely used in industrial environments such as metallurgical industry, buildings, and petrochemical industries.

centrifugal fans a price

Which type of centrifugal fan is the most efficient?

• Impeller centrifugal fans have stronger wind power. Impeller centrifugal fans are divided into two types: forward curved blade type and rear curved blade type. The front curved blade centrifugal fan is suitable for transporting high-speed airflow (i.e. small wind resistance), which can improve operating efficiency; the rear curved blade centrifugal fan is suitable for transporting high pressure, high temperature, high humidity, high viscosity, high dust gas and corrosion sexual gas because its structure is stronger.

best centrifugal fans a​

• How to judge whether a centrifugal fan is good or bad
• 1.Whether the centrifugal fan performance meets the standard static pressure exhaust volume and meets the standard performance can achieve the air supply volume required by the specific system;
• 2.How high is the efficiency of the centrifugal fan? High efficiency of the fan saves electricity. High efficiency of the fan saves electricity;
• 3.How high is the vibration value at the position of the rolling bearing? Fan bearings with high vibration values ​​are easily damaged, while bearings with low vibration values ​​have a long service life;
• 4.What is the operating noise? Noise is air pollution, harms working mood, and also consumes energy;
• 5.Have you considered the convenience of maintenance? Centrifugal fans are equipment that require regular maintenance, and the oil supply holes, exhaust holes, inspection ports, and rolling bearings should be easily disassembled;
• 6.Generally speaking, you can know the advantages and disadvantages of a centrifugal fan by looking at its appearance. If you keep improving the position, centrifugal fans are generally very good.

Which type of centrifugal fan is the most efficient?

• Impeller centrifugal fans have stronger wind power. Impeller centrifugal fans are divided into two types: forward curved blade type and rear curved blade type.
• The front curved blade centrifugal fan is suitable for transporting high-speed airflow (i.e. small wind resistance), which can improve operating efficiency; the rear curved blade centrifugal fan is suitable for transporting high pressure, high temperature, high humidity, high viscosity, high dust gas and corrosion sexual gas because its structure is stronger.

best centrifugal fans a​

What are the three types of centrifugal fans?

• Centrifugal fans are divided into three types: static pressure centrifugal fans, dynamic pressure centrifugal fans and diagonal flow centrifugal fans.
• 1.Static pressure centrifugal fan
• Static pressure centrifugal fans are suitable for occasions requiring larger air volume and lower wind pressure, such as ventilation and air conditioning and refrigeration. Their transmission pressure (static pressure) generally does not exceed 2000Pa. Static pressure centrifugal fans can be divided into forward curved plate centrifugal fans, back curved plate centrifugal fans, right angle centrifugal fans and medium pressure centrifugal fans.The front curved plate centrifugal fan has a set of aluminum curved plates in front of the impeller, which allows the gas entering the impeller to flow to the blades, improving energy utilization and achieving higher static pressure and efficiency. The rear curved plate centrifugal fan has a set of aluminum curved plates behind the impeller to better utilize gas energy and improve efficiency. The right-angle centrifugal fan has a wind direction curve of 90 degrees and has high static pressure. It is suitable for air conditioning supply and exhaust systems. Medium-pressure centrifugal fans are suitable for larger gas flows and pressures, and can meet higher system efficiency.
• 2.Dynamic pressure centrifugal fan
• The transmission pressure (static pressure) of dynamic pressure centrifugal fans is usually above 2000Pa, and is suitable for occasions that require higher wind pressure or require long-distance gas transportation, such as industrial production lines, processes, smelting, etc. Dynamic pressure centrifugal fans can be divided into two types: single suction type and double suction type. The single-suction dynamic pressure centrifugal fan has a shorter suction section and is suitable for transporting gases with less dust, such as fresh air supply and return systems. The double-suction dynamic pressure centrifugal fan has a longer suction section and is suitable for conveying dust-containing gas or where both ends need to be connected to pipes.
• 3.Oblique flow centrifugal fan
• The oblique flow centrifugal fan is a new type of centrifugal fan, suitable for large-scale air supply or exhaust situations. Its air volume can reach 600000m³/h and its static pressure can reach 750Pa. The advantages of this type of fan are high efficiency, low noise, large air volume, small and lightweight, and are generally widely used in industrial environments such as metallurgical industry, buildings, and petrochemical industries.

Centrifugal blower fan

The centrifugal blower is a machine that relies on input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine.

Working principle of centrifugal fan

• The centrifugal fan is based on the principle of converting kinetic energy into potential energy. It uses a high-speed rotating impeller to accelerate the gas, then decelerates and changes the flow direction, so that the kinetic energy is converted into potential energy (pressure).In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes to the radial direction when the gas flows through the impeller, and then enters the diffuser.
• In a diffuser, the gas changes direction of flow causing deceleration, which converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller and secondarily during the pressure expansion process. In multi-stage centrifugal fans, a reflux is used to direct the airflow into the next impeller, creating higher pressure.

What is the difference between a blower and a centrifugal fan?

• 1.Structural differences
• A blower is usually a rotating cylindrical structure consisting of a set of impellers and a casing. An impeller usually consists of a set of curved blades that are fixed to a shaft and create airflow as they rotate. The casing is usually a closed cylindrical structure, and the gap between it and the impeller is very small so that the airflow does not leak.
• The structure of a centrifugal fan is slightly different from a blower. It usually consists of a rotating impeller and a casing. An impeller is usually composed of multiple curved blades that are fixed on a shaft and generate airflow when rotating. The housing is usually a conical structure, and its shape can be adjusted according to different application requirements. Unlike a blower, the gap between the impeller and the casing of a centrifugal fan is relatively large, allowing the airflow to pass through more smoothly.
• 2.Differences in working principles
• A blower works by creating airflow through a rotating impeller, which is then pushed toward the housing, creating a high-pressure area. The air flows from the high-pressure area to the low-pressure area, forming an air flow circulation system. A blower works like a pump, pushing gas to the outside through a rotating impeller.
• The working principle of a centrifugal fan is also to generate airflow through a rotating impeller, but it is different from a blower in that the airflow it generates is pushed to the outside by centrifugal force. As the impeller spins, it pushes the gas toward the ends of the blades, which then pushes the gas toward the outside. The centrifugal force makes the air flow smoothly through the centrifugal fan.
• 3.Application differences
• Due to the structure and working principle of the blower, it is usually used in applications requiring high-pressure air flow, such as air blowing, gas delivery and drying. The blower can generate high-pressure air flow to make the gas flow quickly in the pipeline, thereby realizing various industrial production processes.
• Centrifugal fans have a wider range of applications. Due to its structure and working principle, centrifugal fans can be used in a variety of different applications such as air conditioning systems, gas turbines, boiler ventilation, industrial waste gas treatment, etc.

What is the function of centrifugal fan blower?

• Centrifugal blower is a common fluid mechanical equipment that transports or compresses gas through centrifugal force. It is widely used in various industries such as metallurgy, chemical industry, electric power, and water treatment. Its main functions include the following aspects:
• 1.Air delivery: Centrifugal blowers can deliver a certain flow of air to a designated location. For example, in the industrial production process, air needs to be transported to sintering furnaces, furnaces and other equipment, and centrifugal blowers can play an important role.
• 2.Compressed air: A centrifugal blower can compress air at atmospheric pressure into high-pressure gas. In fields such as chemical industry and petroleum, air compressors can provide the required compressed air for program operations, equipment opening, and combustion.
• 3.Exhaust gas: In some production processes, some toxic and harmful gases will be produced, which need to be discharged through the exhaust system. Centrifugal blower is one of the important exhaust equipment.

What is the difference between a centrifugal fan and a normal fan?

• 1.Definition and working principle
• A centrifugal fan is a machine that uses the rotation of an impeller to generate centrifugal force to suck gas in from the air inlet and discharge the gas. An ordinary fan is a machine that generates pressure in the air through the rotation of the blades, thereby transporting gas.
• 2.Performance characteristics
• The performance curve of centrifugal fans is relatively flat and they can provide a certain amount of air volume even at low flow rates, while ordinary fans are less efficient at low flow rates. Centrifugal fans perform better when handling large air volumes, while ordinary fans are more suitable for small air volumes and high-pressure working environments.
• 3.Structural features
• Centrifugal fans usually consist of a casing, impeller, bearings, motor, etc., and have a relatively complex structure. Ordinary fans are relatively simple. Centrifugal fans are less noisy because their working principle makes them produce less noise.
• 4.Application fields
• Centrifugal fans are usually used in ventilation systems, air handling systems, etc., especially in environments that require large air volumes and are sensitive to noise. Ordinary fans are more commonly used in small equipment or environments that require high pressure.
• 5.Maintenance
• The maintenance of centrifugal fans is relatively complicated, requiring regular replacement of bearings and cleaning of the casing, while the maintenance of ordinary fans is relatively simple. After long-term operation, both fans need to be cleaned to ensure their working effect and extend their service life.
• 6.Cost and efficiency
• The price and maintenance costs of centrifugal fans are usually higher than ordinary fans, but due to their performance characteristics and operational stability, they may increase efficiency and reduce operating costs in some situations. When selecting a fan, the actual application needs and budget should be considered to select the most suitable model.

Types of centrifugal fan

• ‌The types of centrifugal fans mainly include the following: single-suction centrifugal fans, double-suction centrifugal fans, high-pressure centrifugal fans, static pressure box-type centrifugal fans and medium-pressure centrifugal fans‌. These types are suitable for a variety of different work environments and needs depending on their structure and purpose.
• ‌Single-suction centrifugal fan‌: Also known as front-suction centrifugal fan, it is suitable for transporting general gases and has a small air volume range.
• ‌Double-suction centrifugal fan‌: Also known as rear-suction centrifugal fan, it can be used under conditions of high pressure, large air volume, and small starting torque.
• ‌High-pressure centrifugal fan‌: mainly used to transport high-pressure gas, such as blowers, compressors, etc.
• ‌Static pressure box-type centrifugal fan‌: often used to eliminate noise and vibration during work and increase air volume and wind pressure.
• ‌Medium-pressure centrifugal fan‌: suitable for transporting gases with high dust content, high flue gas temperature or condensation water, etc.

Centrifugal fan working principle

• The core working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then convert the kinetic energy of the gas into pressure energy (potential energy) by decelerating and changing the flow direction. ‌
• This process mainly occurs in ‌single-stage centrifugal fans. The gas enters the impeller from the axial direction, changes to the radial direction when flowing through the impeller, and then enters the diffuser. In a diffuser, a change in the direction of gas flow causes deceleration, which converts the kinetic energy of the gas into pressure energy.
• The increase in pressure occurs mainly in the impeller, followed by the expansion process. In multi-stage centrifugal fans, a refluxer is used to direct the airflow into the next impeller, thereby generating higher pressure. ‌

types of centrifugal fan

Centrifugal fan application

• ‌Industrial Manufacturing‌: Centrifugal fans are used in many industrial environments, such as ‌steel metallurgy, ‌chemical industry, ‌mining, etc. In these industries, fans are usually used to strengthen air supply, exhaust, refrigeration and hot air systems. Especially in harsh environments such as high temperature, corrosion, dust, etc., centrifugal fans play an irreplaceable role.
• ‌‌Environmental protection equipment‌: Centrifugal fans are also widely used in environmental protection equipment, such as ‌sewage treatment, ‌exhaust gas purification, etc. At the same time, centrifugal fans also play an important role in dust removal equipment, incineration equipment and advanced physical noise reduction equipment.
• ‌Construction equipment‌: In the construction field, centrifugal fans are used in air conditioning, ventilation, hot air and other fields. Through the air supply and exhaust system, they realize the circulation and flow of air and promote the convection and ventilation of indoor air.
• ‌Temperature control‌: Centrifugal fans can change the ambient temperature by blowing air, so they have important uses in heating, ventilation, air conditioning, drying and other temperature regulation equipment.
• ‌Air purification‌: In special environments such as laboratories, operating rooms and other places that have strict requirements on air quality, centrifugal fans can be used for air filtration and purification.
• ‌Agricultural cultivation‌: In agricultural production, centrifugal fans are used to provide a stable air environment for greenhouse plant growth, animal feeding, etc.
• ‌Transportation equipment‌: In transportation equipment such as trains and ships, centrifugal fans are also used for air circulation.
• ‌‌Food Processing‌: In the food processing industry, centrifugal fans are also very commonly used, such as drying equipment, cooling equipment and other food processing technology equipment.

Which type of centrifugal fan is the most efficient?

• Forward curved plate centrifugal fans have the highest efficiency. ‌Forward curved plate centrifugal fans have high efficiency and small size, and are suitable for smaller air volumes and wind pressures. Therefore, among all types of centrifugal fans, forward curved plate centrifugal fans have the highest efficiency‌.
• The high efficiency of the forward curved plate centrifugal fan is mainly due to its design features. Its impeller rotates in the same direction as the gas flow, which can maximize the use of kinetic energy and reduce energy loss. In addition, the compact structure of the forward curved plate centrifugal fan makes the air flow smoother when passing through the impeller, further improving efficiency.

What are centrifugal fans

• ‌Centrifugal fan is a mechanical device that relies on mechanical energy to increase gas pressure and transport it out. It is widely used in various fields such as energy, environment, and aviation. It is one of the main energy-consuming equipment in industrial and agricultural production. ‌
• The centrifugal fan is a type of impeller machinery. Its working principle is to form a negative pressure inside the fan through the rotation of the impeller, sucking in external air and expelling the fan through the impeller flow channel and volute. The centrifugal fan is mainly composed of casing, impeller, shaft, collector, exhaust port, bearing box, coupling, pulley and base.

what are centrifugal fans

Centrifugal fan working principle

• The core working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then convert the kinetic energy of the gas into pressure energy (potential energy) by decelerating and changing the flow direction. ‌This process mainly occurs in ‌single-stage centrifugal fans. The gas enters the impeller from the axial direction, changes to the radial direction when flowing through the impeller, and then enters the diffuser. In a diffuser, a change in the direction of gas flow causes deceleration, which converts the kinetic energy of the gas into pressure energy. The increase in pressure occurs mainly in the impeller, followed by the expansion process. In multi-stage centrifugal fans, a refluxer is used to direct the airflow into the next impeller, thereby generating higher pressure. ‌
• The workflow of the centrifugal fan includes the following key steps:
• ‌Gas entry‌: The airflow enters the blade space from the axial direction of the fan.
• ‌Acceleration‌: Driven by the impeller, the gas rotates with the impeller and increases energy under the action of inertia.
• ‌Centrifugal force action‌: The gas obtains centrifugal force driven by the impeller and leaves the impeller in the radial direction.
• ‌Diffusion and deceleration‌: When gas enters the diffuser, the change in flow direction causes deceleration. This deceleration converts the kinetic energy of the gas into pressure energy.
• ‌Exhaust gas‌: After passing through the diffuser, the gas is discharged from the fan and has a certain pressure.
• The structure of a centrifugal fan includes a casing, a main shaft, an impeller and other components. The impeller is the main component that generates wind pressure and transmits energy. The casing is used to introduce and discharge gas, and at the same time convert part of the kinetic energy of the gas into pressure energy.

what are centrifugal fans

Types of centrifugal fans

• ‌The types of centrifugal fans mainly include the following: single-suction centrifugal fans, double-suction centrifugal fans, high-pressure centrifugal fans, static pressure box-type centrifugal fans and medium-pressure centrifugal fans‌. These types are suitable for a variety of different work environments and needs, depending on their structure and purpose.
• Single-suction centrifugal fan‌: Also known as front-suction centrifugal fan, it is suitable for transporting general gases and has a small air volume range.
• ‌Double-suction centrifugal fan‌: Also known as rear-suction centrifugal fan, it can be used under conditions of high pressure, large air volume, and small starting torque.
• ‌High-pressure centrifugal fan‌: Mainly used to transport high-pressure gas, such as blowers, compressors, etc.
• ‌Static pressure box-type centrifugal fan‌: often used to eliminate noise and vibration during work and increase air volume and wind pressure.
• ‌Medium pressure centrifugal fan‌: Suitable for transporting gases with high dust content, high flue gas temperature or condensation water, etc.

what are centrifugal fans

Centrifugal fan application

• ‌Industrial Manufacturing‌: Centrifugal fans are used in many industrial environments, such as ‌steel metallurgy, ‌chemical industry, ‌mining, etc. In these industries, fans are usually used to strengthen air supply, exhaust, refrigeration and hot air systems. Especially in harsh environments such as high temperature, corrosion, dust, etc., centrifugal fans play an irreplaceable role.
• ‌‌Environmental protection equipment‌: Centrifugal fans are also widely used in environmental protection equipment, such as ‌sewage treatment, ‌exhaust gas purification, etc. At the same time, centrifugal fans also play an important role in dust removal equipment, incineration equipment and advanced physical noise reduction equipment.
• ‌Construction equipment‌: In the construction field, centrifugal fans are used in air conditioning, ventilation, hot air and other fields. Through the air supply and exhaust system, they realize the circulation and flow of air and promote the convection and ventilation of indoor air.
• ‌Temperature control‌: Centrifugal fans can change the ambient temperature by blowing air, so they have important uses in heating, ventilation, air conditioning, drying and other temperature regulation equipment.
• ‌Air purification‌: In special environments such as laboratories, operating rooms and other places that have strict requirements on air quality, centrifugal fans can be used for air filtration and purification.
• ‌Agricultural cultivation‌: In agricultural production, centrifugal fans are used to provide a stable air environment for greenhouse plant growth, animal feeding, etc.
• ‌Transportation equipment‌: In transportation equipment such as trains and ships, centrifugal fans are also used for air circulation.
• ‌‌Food Processing‌: In the food processing industry, centrifugal fans are also very commonly used, such as drying equipment, cooling equipment and other food processing technology equipment.

centrifugal fan type

• Types of centrifugal fans‌ can be divided according to different classification standards. The following are several common classification methods and their corresponding types:
• ‌Classification by pressure and function‌:
• Ventilator: The exhaust pressure is small, not exceeding 0.015MPa.
• Blower: The exhaust pressure is slightly larger, not exceeding 0.2MPa.
• Compressor: The exhaust pressure is relatively high, from 1MPa to over 100MPa.
• ‌Classification by working principle‌:
• Centrifugal fan: After the airflow enters the impeller axially, it mainly flows in the radial direction, using centrifugal force.
• Axial flow fan: The airflow enters the impeller axially and flows along the axis.
• Rotary fan: uses the rotation of the rotor to change the volume of the air chamber.
• ‌Classification by impeller type‌:
• Front-jet centrifugal fan: Gas enters vertically from the center of the impeller, with small air volume and low pressure.
• Rear-jet centrifugal fan: There is a nozzle behind the impeller, which produces higher gas pressure and air volume.
• Pull-type centrifugal fan: The impeller is reversed, suitable for processing high-concentration gases containing solid impurities.
• Inclined flow centrifugal fan: The impeller axis forms an angle with the air inlet axis to improve efficiency.
• Classification by characteristics‌:
• Medium-pressure centrifugal fans: handle a certain amount of air, dust and other impurities, often used in air conditioning and ventilation systems.
• Low-pressure centrifugal fan: air pressure below 50Pa, suitable for heating equipment.
• High-pressure centrifugal fan: strong processing capacity, suitable for special industrial environments.
• Axial flow centrifugal fan: handles low pressure and high flow conditions, suitable for large ventilation and air conditioning equipment.

centrifugal fan type

What is a centrifugal type fan?

• Centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas‌. It accelerates the gas through a high-speed rotating impeller, then decelerates and changes the flow direction, converting the kinetic energy into potential energy (pressure). Centrifugal fans are widely used in industrial and mining plants, civil buildings, large public buildings, power plants and other places as supporting equipment for air treatment facilities and hot air circulation facilities.
• The structure of a centrifugal fan mainly includes casing, impeller, shaft, suction port, exhaust port and other components. The impeller is the main working component that generates wind pressure and transmits energy; the casing is used to introduce and discharge gas, and at the same time convert part of the kinetic energy of the gas into pressure energy; the impeller is installed and fixed on the crankshaft, and is connected to the motor through a coupling. The blade type of the impeller has a great influence on the performance of the ventilator. Backward-facing blades have higher efficiency but lower gas flow rate, forward-facing blades have higher gas flow rate but lower efficiency, and radial blades have characteristics between the two. between.
• The working principle of centrifugal fans is based on the principle of converting kinetic energy into potential energy. The gas enters the impeller from the axial direction, is accelerated by the impeller, and then leaves the impeller along the radial direction to do work by the centrifugal force generated. The gas accelerates in the impeller, then decelerates in the diffuser, changes the flow direction, and converts kinetic energy into pressure energy. In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, flows through the impeller and then enters the diffuser. In a multi-stage centrifugal fan, the airflow enters the next impeller through the refluxer, generating higher pressure.

Centrifugal fan working principle

• ‌The working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then convert the kinetic energy into potential energy (pressure) by decelerating and changing the flow direction.
• The centrifugal fan is mainly composed of air inlet, impeller, deflector, casing and motor. When working, the motor drives the impeller to rotate at high speed, and the gas from the air inlet is sucked into the impeller. After the impeller accelerates the gas, it is discharged through the deflector and casing. The working principle of the centrifugal fan is based on the action of centrifugal force. When the impeller rotates at high speed, the gas is accelerated to the action of centrifugal force, thus generating a pressure difference. The pressure of the gas at the air inlet is low, while the pressure of the gas at the air outlet is high. Therefore, the gas will flow from the air inlet to the air outlet along the pressure gradient.

Centrifugal fan function

• Centrifugal fans are driven fluid machines that are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induced draft of boilers and industrial furnaces; ‌Cooling and ventilation in air conditioning equipment and ‌household appliances; drying and sorting of grains; ‌wind tunnel wind sources and ‌inflation and propulsion of hovercrafts, etc.
• Its working principle is to use a high-speed rotating impeller to accelerate the gas, then decelerate it, change the flow direction, and convert the kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes to the radial direction when the gas flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes its flow direction and the cross-sectional area of ​​the pipe increases to decelerate the gas flow. This deceleration converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller and secondarily during the pressure expansion process. In multi-stage centrifugal fans, a reflux is used to direct the airflow into the next impeller, creating higher pressure.

Centrifugal fan application

• ‌Industrial Manufacturing‌: Centrifugal fans are used in many industrial environments, such as ‌steel metallurgy, ‌chemical industry, ‌mining, etc. In these industries, fans are usually used to strengthen air supply, exhaust, refrigeration and hot air systems. Especially in harsh environments such as high temperature, corrosion, dust, etc., centrifugal fans play an irreplaceable role.
• Environmental protection equipment‌: Centrifugal fans are also widely used in environmental protection equipment, such as ‌sewage treatment, ‌exhaust gas purification, etc. At the same time, centrifugal fans also play an important role in dust removal equipment, incineration equipment and advanced physical noise reduction equipment.
• ‌Construction equipment‌: In the construction field, centrifugal fans are used in air conditioning, ventilation, hot air and other fields. Through the air supply and exhaust system, they realize the circulation and flow of air and promote the convection and ventilation of indoor air.
• ‌Temperature control‌: Centrifugal fans can change the ambient temperature by blowing air, so they have important uses in heating, ventilation, air conditioning, drying and other temperature regulation equipment.
• ‌Air purification‌: In special environments such as laboratories, operating rooms and other places that have strict requirements on air quality, centrifugal fans can be used for air filtration and purification.
• ‌Agricultural cultivation‌: In agricultural production, centrifugal fans are used to provide a stable air environment for greenhouse plant growth, animal feeding, etc.
• ‌Transportation equipment‌: In transportation equipment such as trains and ships, centrifugal fans are also used for air circulation.
• Food Processing‌: In the food processing industry, centrifugal fans are also very commonly used, such as drying equipment, cooling equipment and other food processing technology equipment.

Centrifugal fan rotation direction

• The rotation direction of the centrifugal fan can be determined by observing the rotation direction of the impeller.
• ‌Looking at the direction of rotation of the impeller from the spindle pulley motor side, clockwise rotation is right-hand rotation, and counterclockwise rotation is left-hand rotation‌.
• The left-hand and right-hand rotation of the centrifugal fan refers to the direction of rotation of the wind wheel. Along the direction of rotation of the wind wheel, the gas movement toward the inside of the casing is a right-hand centrifugal fan, and vice versa is a left-hand centrifugal fan.
• Facing the direction of the air outlet, the one with the air inlet on the left is left-handed, and the one with the air inlet on the right is right-handed.
• These methods can help determine the direction of rotation of the centrifugal fan and ensure its normal operation.

Fan discharge orientation

• ‌‌How to determine the direction of fan air outlet
• ‌Judge by the skeleton and wiring direction‌: Generally, the side where the skeleton can be seen is the air outlet side, and the side where the skeleton cannot be seen is the air inlet side; the side where the wiring can be intuitively seen is the air inlet side, and the side where the wiring cannot be seen is the air inlet side. The side of the line is the wind outlet side.
• ‌Judge by blade shape‌: The side with a more rounded shape of the blade is the air inlet side, and the unrounded side is the wind outlet side.
• ‌Judge by the direction of blade rotation‌: clockwise rotation indicates air outflow, counterclockwise rotation indicates air inflow.
• ‌Judge by the fan mark‌: The side with the mark is the air outlet side, and the side without the label is the air inlet side.
• ‌Judging by the installation direction of the exhaust fan‌: the air outlet side of the exhaust fan should be facing outside, and the air inlet side should be facing indoors.
• ‌Judge by the installation position of the chassis fan: the front of the chassis fan is the air inlet and the back is the air outlet.

What is the direction of the centrifugal fan flow?

• The airflow direction of the centrifugal fan is axially entering the impeller, and then flowing radially through the rotation of the impeller. ‌ When the centrifugal fan is working, the airflow enters the impeller from the axial direction. As the impeller rotates, the airflow increases its energy under the action of inertia and leaves the impeller along the radial direction.
• The specific process of the airflow direction of the centrifugal fan is as follows: the airflow first enters the impeller axially, and then rotates driven by the impeller, and uses the centrifugal force generated to discharge the airflow in the radial direction. This process allows the air flow to gain energy, thereby achieving gas transportation and compression.
• The airflow direction of a centrifugal fan is closely related to its working principle. The centrifugal fan generates centrifugal force through the rotation of the impeller, sucking the airflow from the axial direction, accelerating the airflow through rotation, and then discharges it in the radial direction. This design allows centrifugal fans to efficiently transport and compress gas‌.

Centrifugal fan rotation direction diagram

Centrifugal fan vs axial fan

• ‌The main differences between centrifugal fans and axial fans are their working principles, air flow direction, efficiency and performance, noise and vibration, structure and maintenance, and application fields. ‌
• Working principles are different‌:
• The centrifugal fan generates centrifugal force through the high-speed rotation of the impeller, projects the gas outward from the center, and then discharges it through the volute tube, thereby increasing the pressure and changing the flow rate of the gas.
• Axial flow fans rely on the forward power generated by the rotation of airfoil blades to inhale and discharge air along the axial direction.
• Airflow directions are different‌:
• The gas flow direction of centrifugal fans is away from the center of the impeller, and usually exhibits the characteristics of high pressure and low flow rate.
• The gas flow direction of the axial flow fan is within the impeller axis line, usually showing the characteristics of low pressure and high flow rate.
• Efficiency is different from performance‌:
• Centrifugal fans have higher efficiency and can produce larger air volume and higher wind pressure. They are suitable for application scenarios that require large flow and high wind pressure.
• The efficiency of axial flow fans is relatively low and is suitable for environments that require smaller air volumes but pay more attention to static pressure.
• Noise is different from vibration‌:
• Centrifugal fans are generally noisier than axial fans because their blades produce higher levels of noise.
• Axial flow fans are relatively quiet and suitable for environments where low noise is required.
• Structure and maintenance are different‌:
• The structure of centrifugal fans is usually complex and difficult to maintain and repair. Moreover, the impeller and casing are usually designed as a whole. Once damaged, they need to be replaced as a whole.
• The structure of the axial flow fan is relatively simple and easier to maintain and repair.
• Different application fields‌:
• Centrifugal fans are widely used in applications requiring large flow and high wind pressure, such as ventilation and air conditioning systems.
• Axial flow fans are more commonly used in environments that require smaller air volumes but pay more attention to static pressure, such as offices, shops, etc.‌.

centrifugal fan vs axial fan

centrifugal fan working principle

• The working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then convert the kinetic energy into potential energy (pressure) by decelerating and changing the flow direction. ‌‌
• The centrifugal fan is mainly composed of air inlet, impeller, deflector, casing and motor. When working, the motor drives the impeller to rotate at a high speed, and the gas from the air inlet is sucked into the impeller. After the impeller accelerates the gas, it is discharged through the deflector and casing. The working principle of the centrifugal fan is based on the action of centrifugal force. When the impeller rotates at high speed, the gas is accelerated to the action of centrifugal force, resulting in a pressure difference. The pressure of the gas at the air inlet is low, while the pressure of the gas at the air outlet is high. Therefore, the gas will flow from the air inlet to the air outlet along the pressure gradient.

centrifugal fan vs axial fan

Which is better axial fan or centrifugal fan?

• ‌Axis fans and centrifugal fans each have their own advantages and disadvantages and are suitable for different occasions. ‌When choosing, comprehensive considerations should be made based on actual needs and budget.
• Axial fans and centrifugal fans work on different principles. Axial fans rotate axially and use the centrifugal force of the impeller to accelerate the gas, thereby increasing the pressure of the gas. The centrifugal fan accelerates the flow of air or other gases through centrifugal rotation, thereby converting kinetic energy into static pressure and blowing the gas to the designated position.
• In terms of applicable occasions, centrifugal fans are suitable for occasions that require larger air volume and higher pressure, such as ventilation in large factories, warehouses, sports venues and other places. Axial flow fans are suitable for occasions that require smaller air volume and higher speed, such as local ventilation in computer rooms, laboratories, production workshops and other places.
• In terms of performance characteristics, centrifugal fans have large air volume and high pressure, but they are noisy, more expensive, and have a longer service life. Axial flow fans have small air volume, moderate pressure, relatively low price, and simple installation and maintenance.
• In terms of efficiency, centrifugal fans perform better in higher pressure ranges, especially when dealing with high-concentration exhaust gases, and can more effectively reduce energy consumption and emissions. Axial flow fans have high efficiency under large flow and low pressure conditions, and are suitable for ventilation and heat dissipation and other occasions that require high air volume but relatively low pressure requirements.
• In terms of cost-effectiveness, the cost of centrifugal fans is relatively high, but after long-term operation, due to their stable performance and high efficiency, they can save a lot of energy and operating costs. Axial flow fans can also meet the needs in some situations, are low-cost, and are suitable for short-term use or local ventilation.

centrifugal fan vs axial fan

Why use a centrifugal fan?

• ‌Centrifugal fans are widely used in many fields, including construction, industrial production, environmental management and air conditioning systems. ‌
• First of all, ‌in the construction industry‌, centrifugal fans are used for ventilation and air circulation, improving air quality and providing a good and comfortable working and living environment. For example, in large shopping malls, convention and exhibition centers, office buildings and other places, centrifugal fans provide fresh air by discharging dirty air to maintain indoor air quality and comfort.
• Secondly, in the industrial field, centrifugal fans are widely used in factories, workshops and other places to eliminate toxic and harmful gases, control temperature, eliminate dust and odors, etc., and create a good working environment for employees. For example, in chemical, mining, electric power and other industries, centrifugal fans are often used to transport gases, discharge waste gases, etc., to improve production efficiency and reduce energy consumption.
• In addition, in the air conditioning system, centrifugal fans are an important part of the air conditioning system and are used for air circulation, pressurization, exhaust, etc. to ensure the circulation and cleanliness of indoor air. Provide comfortable temperature and humidity indoors through air supply, return air, exhaust, etc.
• Finally, in terms of environmental management, centrifugal fans are used in facilities such as urban sewage treatment plants to send gas to subsequent treatment equipment for processing, purify the air, and reduce environmental pollution. For example, in environmental protection facilities such as exhaust gas treatment, smoke purification, and gas adsorption, centrifugal fans can effectively extract and discharge harmful gases and particulate matter from the atmosphere.

centrifugal fan vs axial fan

Are centrifugal or axial fans quieter?

• Axial fans are generally quieter than centrifugal fans.
• When an axial flow fan is working, the blades push the air to flow in the same direction as the axis. This structure makes the air volume larger, but it also means that the noise is relatively small.
• The reason why axial flow fans make less noise is that the airflow direction is parallel to the axis. This design makes the airflow smoother and reduces the generation of turbulence and noise. In addition, axial fans are usually used in systems with low static pressure that require higher airflow levels, which also gives them certain advantages in noise control.
• In contrast, when a centrifugal fan is working, the gas flow direction is perpendicular to the rotating axis. Although this design provides greater wind pressure, it also brings greater noise. Although centrifugal fans can provide stable air supply in high-pressure systems, their structure and working method result in relatively loud noise.
• To sum up, axial fans are generally quieter than centrifugal fans due to their design where the airflow direction is parallel to the axis.

centrifugal fan application / centrifugal fan working principle

• Centrifugal blower is a commonly used fan equipment. Its main purpose is to transport, circulate, pressurize or discharge air, gas or dust and other substances. It is widely used in industry, construction, metallurgy, chemical industry, electric power, environmental protection and other fields. The following are the main uses of centrifugal blowers:
• 1.Ventilation: Centrifugal blowers can be used for ventilation in buildings to eliminate indoor odors, moisture, and turbidity, and keep indoor air fresh and comfortable.
• 2.Heating and cooling: Centrifugal blowers can be used as part of a heating or cooling system to regulate the temperature of a room or equipment by circulating air or conducting heat.
• 3.Enhance combustion: The centrifugal blower can be used to pressurize the gas combustion during the combustion process to improve combustion efficiency and combustion stability.
• 4.Air guide and exhaust: Centrifugal blowers can be used in air guide ducts or systems to provide gas power for other machines or equipment, and can also be used to discharge waste gas, flue gas or dust.
• 5.Dust removal and cleaning: Centrifugal blowers are often used in dust removal systems in industrial production. By generating strong wind, dust or other pollutants in the discharged materials are collected and filtered to keep the air clean.
• 6.Drying and drying: Centrifugal blowers can be used in the drying and drying process in industrial production to take away moisture from the surface of materials through wind force and speed up the drying speed.
• 7.Gas supply boosting: Centrifugal blowers can be used to pressurize or supply gas, such as oxygen supply systems, compressed air supply, etc.
• 8.Metallurgical process: Centrifugal blowers are widely used in the metallurgical industry, such as ventilation, blasting and pressurization of metallurgical furnaces, blast furnaces, steel-making furnaces, etc.

How does a centrifugal blower work?centrifugal fan working principle

• The working principle of a centrifugal blower is to use the centrifugal force generated by a working wheel equipped with many blades to squeeze the air to achieve a certain air volume and pressure.
• When the motor rotates, the impeller rotates with it. When the impeller rotates, it generates centrifugal force to throw the air out of the impeller. The air is collected in the casing. Due to the slow speed and high pressure, the air is discharged from the ventilator outlet and flows into the pipe. When the air in the impeller is discharged, a negative pressure is formed. The air outside the suction port is forced into the impeller under the action of atmospheric pressure, so that the impeller continues to rotate and the air continues to flow in the pipe under the action of the ventilator.
• Specifically, the working process of the centrifugal blower can be divided into the following steps:
• ‌Gas entry‌: Gas enters the impeller from the axial direction, and the impeller rotates at high speed to generate centrifugal force.
• Gas acceleration‌: The gas is affected by centrifugal force in the impeller, is accelerated and thrown toward the casing.
• ‌Kinetic energy conversion‌: The gas decelerates in the diffuser, kinetic energy is converted into pressure energy, and the pressure increases.
• ‌Gas discharge‌: Gas is discharged from the ventilator outlet and enters the pipe.
• ‌Circulation‌: Due to the negative pressure caused by the outflow of gas, outside air is automatically replenished and enters the impeller, and the cycle proceeds‌.

centrifugal fan working principle

Types of centrifugal fans

• The types of centrifugal fans mainly include the following: single-suction centrifugal fans, double-suction centrifugal fans, high-pressure centrifugal fans, static pressure box-type centrifugal fans and medium-pressure centrifugal fans‌. Each of these types of centrifugal fans has its own specific application scenarios and performance characteristics.
• ‌Single-suction centrifugal fan‌: Single-suction centrifugal fan, also known as front-suction centrifugal fan, is suitable for transporting general gases and has a small air volume range.
• Double-suction centrifugal fan‌: Double-suction centrifugal fan, also known as rear-suction centrifugal fan, is suitable for use when pressure is high, air volume is large, and starting torque is small.
• ‌High-pressure centrifugal fan‌: High-pressure centrifugal fan is mainly used to transport high-pressure gas, such as blowers, compressors, etc.
• ‌Static pressure box-type centrifugal fan‌: often used to eliminate noise and vibration during work and increase air volume and wind pressure.
• Medium-pressure centrifugal fan‌: Suitable for transporting gases with high dust content, high flue gas temperature or condensation water, etc.
• In addition, centrifugal fans can be further subdivided according to different classification standards. For example, according to pressure and function, there are ventilators, blowers and compressors; according to working principles, there are centrifugal fans, axial fans and rotary fans. Each type of fan has its own unique design and applicable scenarios to meet different industrial and civil needs‌.

centrifugal fan working principle

What is the difference between a centrifugal fan and a blower?

• The main differences between centrifugal fans and blowers are their working principles, application scenarios, pressure and flow characteristics, and efficiency and energy consumption. ‌
• The working principle is different‌. The centrifugal fan relies on a high-speed rotating impeller to generate centrifugal force to accelerate and discharge the gas. The gas gains kinetic energy under the action of the impeller and is discharged. A blower also uses centrifugal force generated by an impeller to move air, but its design is usually more compact and suitable for achieving high air flow at lower pressure.
• The application scenarios are different. Centrifugal fans are widely used in factory ventilation, cooling towers, vehicle and ship ventilation, boiler and industrial furnace ventilation and other fields. Blower blowers are typically used in applications that require higher air flows, such as forced-air heating systems, air conditioning equipment, and industrial drying.
• ‌Pressure and flow characteristics are different‌. The exhaust pressure of centrifugal fans is low, but the flow rate is large. It is suitable for occasions where the pressure requirement is not high but a large amount of air flow is required. Blower, on the other hand, can achieve higher airflow at lower pressure and is suitable for applications requiring high airflow.
• Efficiency and energy consumption are different. While centrifugal fans can achieve higher efficiencies, blowers are more efficient in applications that require high airflow at lower pressures because their compact design and high-speed operation help save energy.