Gas-magnetic hybrid bearing for gyro motor use

Abstract

The invention relates to a gas-magnetic hybrid bearing for gyro motor use. The bearing comprises a shaft sleeve, a shaft, thrust plates, inner magnet rings, outer magnet rings and nuts. The shaft piercing through the shaft sleeve is coaxial installed inside the shaft sleeve, and two ends of the shaft are coaxially provided with thrust plates that are fastened by nuts. Tiny gaps are kept between the shaft and the shaft sleeve as well as between the thrust plates. A group of outer magnet rings are coaxially arranged on the inner surface of the shaft sleeve, and a group of inner magnet rings corresponding to the outer magnet rings in positions are coaxially mounted on the outer surface of the shaft. And the inner round faces of the outer magnet rings and the outer round faces of the inner magnet rings are of the same polarity, so that the function of a permanent magnetic bearing can be realized. The gas-magnetic hybrid bearing for gyro motor use in the invention has simple structure, scientific design, safety and reliability, and strong practicality. The bearing provided in the invention integrates the advantages of aerodynamic bearings and permanent magnetic bearings, overcomes the friction and wear problems during motor starting and stop in aerodynamic bearings, and also solves the problems of poor system stability and small rigidity in permanent magnetic bearings.

Description

technical field [0001] The invention relates to the field of high-speed bearings, in particular to an aeromagnetic hybrid bearing for a gyro motor. Background technique [0002] Bearings are the core components of gyro motors, and the accuracy and life of gyro motors depend on the high-speed rotating bearings. In order to realize the high-speed and reliable operation of the gyro motor, the support problem of the high-speed rotor must be solved. At present, the bearings that can realize non-contact support mainly include the following types: gas bearings, electromagnetic suspension bearings and permanent magnetic bearings. At present, these kinds of bearings commonly used in gyro motors have different degrees of defects, as follows: 1. Gas bearings can be divided into gas static pressure bearings, gas dynamic pressure bearings and extrusion film bearings, gas static pressure bearings and extrusion film bearings. Film bearings require additional equipment and have complex st...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a reasonable design, simple structure, which can not only overcome the friction and wear problem of the gas dynamic pressure bearing in the process of starting and stopping the motor, but also solve the problem of the stability of the permanent magnetic bearing system. Aeromagnetic hybrid bearings suitable for gyro motors with poor performance and low stiffness

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