Magnetic suspension bearing and magnetic suspension centrifugal compressor and air conditioner

Abstract

The invention provides a magnetic suspension bearing, a magnetic suspension centrifugal compressor and an air conditioner. The magnetic suspension bearing comprises an axial thrust bearing (1), a first axial bearing stator (2) and a second axial bearing stator (3), wherein the first axial bearing stator (2) and the second axial bearing stator (3) are correspondingly arranged at two axial ends of the axial thrust bearing (1) and are used for adjusting the axial position of the axial thrust bearing (1); and at least one of the first axial bearing stator (2), the second axial bearing stator (3) and the axial thrust bearing (1) is provided with an axial displacement sensor (4) for detecting the axial displacement of the axial thrust bearing (1). The magnetic suspension bearing improves the accuracy of axial displacement detection of the thrust bearing; and the control accuracy is improved.

Description

technical field [0001] The application belongs to the technical field of compressors, and in particular relates to a magnetic suspension bearing, a magnetic suspension centrifugal compressor, and an air conditioner. Background technique [0002] Magnetic suspension bearing is a kind of high-performance mechatronic bearing without mechanical contact, friction, oil and no lubrication. It is suitable for high-speed and ultra-high-speed occasions. Therefore, the stability and reliability of magnetic suspension bearing operation are particularly important. [0003] Generally, a magnetic suspension centrifugal compressor as a rotating machine mainly includes a pneumatic system, a magnetic suspension bearing support system, and a motor drive system. The motor drive system drives the motor shaft to rotate at high speed, driving the pneumatic system's first-stage impeller, second-stage impeller and other pneumatic parts to do work; the magnetic suspension bearing system includes two ...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, when the magnetic suspension bearing is applied to the centrifugal compressor, it is necessary to detect the axial displacement of the main shaft. When the axial displacement detection sensor and the axial magnetic suspension bearing are respectively arranged at both ends of the main shaft, the The distance between the sensor and the axial magnetic suspension bearing is far away. When the main shaft is deformed due to high-speed rotation or other reasons, the axial displacement of each section of the main shaft may not be consistent. The axial displacement of the main shaft detected by the axial displacement sensor is not equal to the axial magnetic suspension bearing. The axial displacement of the thrust bearing, so the bearing controller may generate excessive or insufficient control signals, which may cause collisions during the operation of the spindle, resulting in serious consequences

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