Tapered roller type protective bearing device that simultaneously eliminates the radial and axial clearance of the rotor

Abstract

The invention discloses a tapered roller type protective bearing device capable of eliminating rotor radial and axial clearances simultaneously. The device includes a rotor, a protective bearing, a bearing gland, screws and a bearing seat. The rotor end is processed into an inclined plane with conicity. A left wedge-shaped circular plate and a right wedge-shaped circular plate are axially disposed outside an annular connecting piece and are mounted in a rolling bearing inner race by means of interference fit, the circumferential surfaces in the wedge-shaped circular plates are equipped with repeated arc segments corresponding to the number of tapered rollers, the radial distance L2 between each segment and the device center decreases gradually from the middle to two ends. A positioning cylinder is mounted in the rolling bearing inner race. The tapered rollers are disposed in a direction opposite to the inclined plane direction of the rotor. The external round surfaces of roller shafts are in contact with the inner surfaces of the wedge-shaped circular plates. The device provided by the invention can eliminate the radial and axial clearances between the rotor and the tapered rollers, eliminates the radial and axial clearances between the rotor and the rolling bearing, and eliminates the vibration and shock caused by fall of the high-speed rotor to the rolling bearing, thus meeting the development needs of a high-speed magnetic bearing system.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension bearing systems, in particular to a tapered roller type protective bearing device which simultaneously eliminates radial and axial clearances of rotors. Background technique [0002] In the magnetic suspension bearing system, a set of protective bearings (also known as auxiliary bearings, spare bearings, holding bearings or emergency bearings) is generally required as a temporary support in case of system power failure, overload, control system failure or failure. The tapered roller type automatically eliminates the centripetal thrust protection bearing of the rotor gap, which can bear the load in the radial direction and the axial direction at the same time, so as to ensure that the high-speed rotating rotor does not collide with and rub against the stator part of the system, so as to ensure the safety and reliability of the entire system sex. The traditional protective bearing desig...

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 clearance, but its structure is very complicated, and it can only eliminate the radial clearance, but cannot eliminate the axial clearance, and Since the diameter of the rotor is much larger than that of the surrounding rolling bearings, the rotational speed of the circumferential rolling bearings after falling is much greater than its own limit speed, which does not fundamentally solve the problem

[0004] At present, there is no protective bearing device that can completely eliminate the rotor radial and axial clearances at the same time

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