Radial protection bearing device for automatically eliminating radial clearance of rolling bearing inner ring

Abstract

The invention discloses a radial protection bearing device for automatically eliminating the radial clearance of a rolling bearing inner ring. The radial protection bearing device comprises an outer-layer mounting base, an inner-layer mounting base, a support seat and a rotor assembly, wherein a rolling bearing is mounted between a bearing mounting neck of the inner-layer mounting base and an inner cavity of the outer-layer mounting base; the inner circle of the support seat is concentrically arranged with the rotor assembly; the support seat comprises more than two support seat branch bodies which are positioned with the inner-layer mounting base through first positioning pins; the support seat branch bodies are connected to from a whole body by adopting second positioning pins through annular connecting pieces; and at least one support seat branch body is equipped with a support seat adjusting device which can be used for maintaining the concentricity between the support seat and the rotor assembly. Therefore, according to the radial protection bearing device disclosed by the invention, the radial clearance between the rotor assembly and the rolling bearing can be automatically eliminated after a magnetic suspension bearing system is failed and a rotor falls off, furthermore, the impact and the vibration to the rolling bearing caused by the fall of the rotor assembly are eliminated, and the reliability and the safety of the radial protection bearing are enhanced to meet the requirement of a high-speed magnetic suspension bearing system.

Description

technical field [0001] The invention relates to a radial protection bearing device that automatically eliminates the radial clearance of the inner ring of a rolling bearing, eliminates repeated impacts and collisions on the rolling bearing when the rotor falls, and is suitable for radial protection bearings that bear radial loads in high-speed magnetic suspension bearing systems. The invention belongs to the field of magnetic suspension bearing system. Background technique [0002] In the magnetic suspension bearing system, in order to ensure the safety and reliability of the system, a set of protective bearings (also called retaining bearings, spare bearings, auxiliary bearings or emergency bearings) is generally required, one of which is the radial bearing that only bears radial loads. Bearing protection, its main purpose is to temporarily support the high-speed rotating rotor in the radial direction when the magnetic suspension bearing system fails, so as to protect the m...

AI Technical Summary

Problems solved by technology

At present, there is a method of covering the circumference of the rotor assembly with rolling bearings, and after the rotor assembly falls, the movement of the surrounding rolling bearings can eliminate the gap, but its structure is very complicated, and at the same time it only supports the fall of the rotor assembly when it rotates in one direction. And because the diameter of the rotor is much larger than that of the surrounding rolling bearings, the rotational speed of the circumferential rolling bearings after the drop is much greater than its own limit speed, which does not fundamentally solve the problem

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