Introduction to the Principle and Usage Advantages of Air-Suspended Fans
Release date:
2021-07-20
Air-bearing fans primarily consist of components such as radial bearings and thrust bearings. Before startup, there is physical contact between the shaft and the bearings. When the air-bearing fan starts up, the rotating shaft and bearings undergo relative motion, generating air pressure. As the shaft rotates, the airflow around the shaft (with its kinetic energy) is converted into pressure, causing the rotating shaft to spin freely. Within the radial bearing, this hydrodynamic flow generates a lifting force. This lifting force suspends the rotating shaft, enabling it to rotate smoothly and freely.
Air suspension fan Principle:
Air-bearing fans primarily consist of components such as radial bearings and thrust bearings. Before startup, there is physical contact between the shaft and the bearings. When the air-bearing fan starts up, the rotating shaft and bearings undergo relative motion, generating air pressure. As the shaft rotates, the airflow around it (with its kinetic energy) is converted into pressure, causing the rotating shaft to spin freely. Within the radial bearing, this hydrodynamic flow creates a lifting force. This lifting force suspends the rotating shaft, enabling it to rotate smoothly and freely.
Air suspension fan Advantage:
(1) Air-bearing fans have high efficiency and significant energy savings.
The air-bearing suspended fan features a high-efficiency impeller and an ultra-high-speed motor that are directly connected via air bearings, eliminating the need for a gearbox and lubrication system. This design ensures no mechanical contact, zero vibration, low operating noise, and removes the requirement for a soundproof enclosure.
Air suspension fan Using a PMSM motor and a variable-frequency speed control system, the rotational speed is adjusted to precisely control flow rate and pressure, maintaining high efficiency within the fan’s operating flow range.
2) Air-bearing fans save space and reduce investment in auxiliary facilities.
Air-bearing blowers are compact in size, lightweight, and require simple foundation construction; they do not need lifting equipment during installation. Moreover, depending on specific needs, they can be arranged in a variety of convenient configurations—for example, the blower room can be directly located above the aeration tank, which helps save on pipeline investment and reduce pipeline resistance losses.
3) The air-bearing fan is easy to operate and highly automated.
The air-bearing fan itself performs self-checks on parameters such as rotational speed, pressure, temperature, and flow rate, and is equipped with features to prevent surge, enabling unmanned operation. Within the fan’s operating range, the fan’s air volume and pressure output can be freely adjusted in response to external control signals.
Air suspension fan There is no need for local control cabinets or soft-start cabinets; the fan itself is equipped with an integrated local control system. The main control panel installed in the fan room, via a computer CPU, can automatically and continuously adjust pressure and flow, control fan startup, and provide alerts for any issues, enabling simultaneous automatic control of single or multiple fans. It can also be remotely controlled from a central control room.
After undergoing brief training, the relevant technical personnel can set up the fan according to the procedures outlined in the operation manual, enabling it to automatically start up and operate unattended.
4) The air-bearing fan boasts high reliability.
Air suspension fan Employing two cutting-edge technologies—the ultra-high-speed (PMSM) motor and HAFB (HydroDynamic Air Foil Bearing) hydrodynamic air foil bearing technology—this system eliminates failures caused by transmission, oil lubrication systems, and complex control system malfunctions. Key components are made from premium materials: the impeller is crafted from aluminum alloy, and the shaft is made from titanium. Through standardized production processes, we ensure that the equipment delivers consistently outstanding performance and boasts high reliability. The impeller has a service life of over 30 years, and the bearings can withstand more than 20,000 start-up cycles.
Air-bearing blowers do not require gearboxes, speed increasers, or couplings; instead, they are directly driven by high-speed permanent-magnet synchronous motors. The motors are speed-controlled via variable-frequency drives. The blower impeller is directly coupled to the motor, while the shaft is levitated by an active air bearing controller. Because there is no physical contact and no need for a lubrication system, air-bearing centrifugal blowers feature high efficiency, energy savings, low noise levels, reliable operation, and long-term maintenance-free performance, with a service life of over 20 years.
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