What are the principles and components of an air suspension blower? In fact, during the start-up and shutdown stages of the air suspension blower with foil bearings, when the speed is below the critical speed, the dynamic pressure effect is not sufficient to fix the rotor. This period of time is short, but there is still flat foil. Its structure mainly includes impeller, air suspension bearing, frequency converter, high-speed permanent magnet motor and its structural control system. At the same time, in order to improve the service life of dynamic pressure bearings, it is necessary to apply high-quality lubricating coatings on the bearing surface. At this point, there will still be contact friction between the inner surface of the bearing and the rotor. Air suspension bearings use air as the working medium, elastic flat foil as the support surface, and elastic wave foil as the support component. The motor spindle is coaxial with the fan impeller, and the high-speed rotor system is directly supported by air suspension bearings. On the surface of the foil and rotor, the flat foil and corrugated foil undergo elastic deformation, pushing the flat foil apart, and then keeping the rotor in a suspended state. The wear and tear of the film can shorten its service life, therefore, when using an air suspension blower, it is necessary to minimize frequent start stop operations as much as possible.
The uneven circumferential air pressure of the air suspension blower enables the foil bearing to withstand loads. Its main core technologies are air suspension bearing technology, high-speed permanent magnet synchronous motor and its control technology. At first, the impeller rotor comes into contact with the bearing, but when the rotor enters a high-speed rotation state, dynamic pressure effects will occur between the planes due to the viscosity of the air and the action of the wedge block. Or more simply put, during high-speed rotation of the rotor, a high-pressure gas film is formed between the rotor and the foil, thereby promoting the rotor. As can be seen from the above, although there is no friction between the impeller and rotor after the air suspension blower operates normally, it does not mean that the equipment has no friction throughout the entire process.
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