Axial magnetic suspension bearing

Abstract

The invention discloses an axial magnetic suspension bearing which comprises a bearing body and a protecting device, wherein the bearing body comprises a stator and a rotor, wherein the protecting device comprises a first component which is fixedly mounted relative to the stator and a second component which is fixedly mounted relative to the rotor; one of the first component and the second component comprises a first stopping part; the other one of the first component and the second component comprises a second stopping part and a third stopping part; one part of the first stopping part is positioned between the second stopping part and the third stopping part in the axial direction; and a protective gap of the protecting device is smaller than a working gap of the bearing body. According to the axial magnetic suspension bearing disclosed by the invention, the bearing body and the protecting device can be separated, so that when a magnetic suspension system is unstable, the protecting device is preferably damaged, a complex and precision axial magnetic suspension bearing body is prevented from being damaged, and further the aim of protecting the axial magnetic suspension bearing is achieved.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to an axial magnetic suspension bearing. Background technique [0002] Magnetic suspension bearings use magnetic force to suspend the rotor in the air relative to the stator, so that there is no mechanical contact between the rotor and the stator. Compared with traditional rolling bearings, sliding bearings, etc., the rotor of magnetic bearing can run to a very high speed, so it is usually used in high-speed and ultra-high-speed occasions, such as some high-speed, ultra-high-speed machines. In this type of machine, the magnetic suspension bearing is a very critical component. Once the magnetic suspension system fails, the magnetic suspension product will not be able to start the suspension, and will not be able to operate normally, often resulting in production losses. Therefore, corresponding protection devices need to be equipped when designing magnetic suspension bearings. [...

AI Technical Summary

Problems solved by technology

[0004] In this technical solution, the protection gap between each axial protection bearing and the thrust disc and the working gap between each axial iron core and the thrust disc are completely guaranteed by the assembly accuracy and machining accuracy, and cannot be directly adjusted, and the product qualification rate is relatively difficult. Control, quality flexibility is poor, and the thrust plate often needs to be disassembled and assembled multiple times during indirect adjustment, which will reduce the interference of the thrust plate and cause safety hazards

At the same time, in this technical solution, the front axial protection bearing 33 and the front axial iron core 31, the rear axial protection bearing 35 and the rear axial iron core 37 are also all interference fits. After 33 and 35 are worn out, the entire axial magnetic suspension bearing will be scrapped and cannot be used again, which will bring great loss and inconvenience to product maintenance

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