Electromagnetic adsorption type protective bearing device

Abstract

The invention relates to a magnetic suspension bearing system, in particular to an electromagnetic adsorption type protective bearing device which comprises a rotor, a supporting assembly and an electromagnetic drive assembly; the end part of the rotor is provided with a bearing; the supporting assembly is arranged on the radial outer side of the bearing; the supporting assembly and the outer peripheral surface of the bearing are arranged at an interval; the electromagnetic drive assembly comprises an electromagnetic adsorption piece and a drive piece; in an initial state, the drive piece pushes the supporting assembly to be close to and contacted with the bearing under the effect of an elastic piece; and in a normal working state, the electromagnetic adsorption piece generates an adsorption force to drive the drive piece to move far away from the bearing. For the electromagnetic adsorption type protective bearing device, when a magnetic suspension bearing fails, and the rotor falls off, a temporary support is provided to the rotor, damages caused by vibration and impact caused by falling of the rotor are prevented, and the reliability of the magnetic suspension system is improved.

Description

technical field [0001] The invention relates to a magnetic suspension bearing system, in particular to an electromagnetic adsorption type protective bearing device. Background technique [0002] The magnetic suspension bearing system will lose the bearing capacity of the rotor in the case of power failure, overload, etc., so it is necessary to install a protective bearing device to provide temporary support for the rotor that loses support, so as to prevent the high-speed rotating rotor from falling on the stator and ensure the entire The safety of the magnetic levitation system. At present, the protective bearings used in the magnetic levitation system mostly adopt traditional rolling bearings, but in order to make the magnetic levitation system work normally, there is a fixed gap between the rotor and the inner ring of the rolling bearing. Therefore, when the rotor falls, since the gap between the rotor and the bearing cannot be eliminated, the bearing will be greatly imp...

AI Technical Summary

Problems solved by technology

Therefore, when the rotor falls, since the gap between the rotor and the bearing cannot be eliminated, the bearing will be greatly impacted and vibrated by the rotor, resulting in damage to the protective bearing

However, some new protective bearings that can eliminate gaps still have many shortcomings. Their structures are complex, their response speed is slow, or they need to rely on the control system to work. In the case of power failure, the entire protective bearing cannot operate. Sex is not high

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