High-speed permanent magnet motor using aerodynamic pressure foil bearings for supporting

Abstract

The invention discloses a high-speed permanent magnet motor using aerodynamic pressure foil bearings for supporting. The high-speed permanent magnet motor comprises two first air-suspending bearings and two second air-suspending bearings, wherein each first air-suspending bearing comprises a bearing seat, a tubular bump foil layer and a tubular flat foil layer matched with the bearing seat are respectively arranged on the inner side of each bearing seat, and when a motor rotor rotates, natural aerodynamic bearing air films can be formed in the bearings to enable the aerodynamic pressure foil bearings to support the motor rotor. The high-speed permanent magnet motor using the aerodynamic pressure foil bearings for supporting has the advantages that the rotating speed can range from 6000rpm to 90000rpm, the motor power can range from 150w to 200kw, processing, manufacturing and assembly are simple, no lubricating oil system or extra air supplying system is needed, low cost is realized, and applicability to various high-rotating-speed turbine machines is realized, and problems of the high-speed motors supported by the bearings are solved.

Description

technical field [0001] The present invention relates to a bearing in the case of a high-speed permanent magnet motor. More specifically, the present invention relates to a high-speed permanent magnet motor supported by an aerodynamic foil bearing for use in the case of a high-speed permanent magnet motor. Background technique [0002] Dynamic pressure gas bearings are divided into dynamic pressure gas radial bearings and dynamic pressure gas thrust bearings according to the direction of limiting rotor displacement. The compressed gas thrust bearing limits the axial displacement of the rotor and bears the load from the axial direction. [0003] The speed of high-speed permanent magnet motors is generally as high as tens of thousands or even hundreds of thousands of revolutions per minute. Compared with ordinary motors, the mechanical transmission device is removed to reduce equipment volume, save maintenance costs, improve operating accuracy and operating efficiency, and hav...

AI Technical Summary

Problems solved by technology

[0004] However, in order to make better use of the high-speed characteristics of high-speed permanent magnet motors, it is necessary to solve the support problem of high-speed motors

Commonly used high-speed permanent magnet motor support bearings mainly include high-precision mechanical bearings, magnetic suspension bearings, air static pressure bearings, oil-lubricated sliding bearings, etc. High-precision mechanical bearings have processing and assembly precision, short service life, and regular addition of lubricating oil problems; magnetic suspension bearings have problems such as complex structure, complicated control, poor reliability, and high processing and assembly accuracy; aerostatic bearings require additional air source devices, and processing and assembly accuracy are high; oil-lubricated sliding bearings also have problems There are problems of oil sealing and leakage, high processing and assembly precision

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