Magnetic suspension bearing, magnetic suspension motor and compressor

Abstract

The invention provides a magnetic suspension bearing, a magnetic suspension motor and a compressor. The magnetic suspension bearing comprises an outer iron core and an inner iron core located in a mounting annular cavity of the outer iron core, an inner annular wall of the inner iron core is provided with magnetic steel in a sleeved manner, an outer annular wall of the inner iron core is in contact connection with a cavity wall of the mounting annular cavity, and a radial gap is formed between one side, deviating from the inner iron core, of the magnetic steel and a thrust disc. According to the magnetic suspension bearing, excessive magnetic flux leakage of the magnetic steel can be effectively avoided, the utilization rate of the magnetic steel is increased, the overall axial output of the bearing is further improved, the volume consumption of the magnetic steel can be reduced on the premise of not changing the magnetic force requirement, and the bearing is compact in structure and lower in cost.

Description

technical field [0001] The invention belongs to the technical field of magnetic suspension bearing manufacturing, and in particular relates to a magnetic suspension bearing, a magnetic suspension motor and a compressor. Background technique [0002] Magnetic suspension bearing is a new type of magnetic machinery, which is a new type of high-performance bearing that uses magnetic force to suspend the rotor in space. Since there is no mechanical contact between the rotor and the stator, there is no mechanical friction, and it has the characteristics of low loss, low noise, low vibration, no lubrication, little pollution to the environment, and long-term ultra-high-speed operation. Magnetic suspension bearings have incomparable advantages over traditional bearings. When working, they can reach very high speeds. Dynamic parameters such as stiffness and damping can be easily adjusted by adjusting the controller parameters. [0003] Magnetic suspension bearings are mainly divided...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the present invention provides a magnetic levitation bearing, a magnetic levitation motor, and a compressor to overcome the phenomenon of magnetic steel magnetic field leakage before reaching the axial gap in the prior art, which seriously leads to a low utilization rate of the magnetic steel and reduces the overall axial output of the bearing. lack of

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