Motor end cover shaft sleeve and preparation method

Abstract

The invention provides a motor end cover shaft sleeve. The motor end cover shaft sleeve comprises an outer ring and an inner ring uniformly distributed along the inner circumferential direction of the outer ring, the material of the outer ring comprises a matrix structure, a foaming agent and inevitable impurities, and the material of the inner ring comprises a matrix structure and inevitable impurities; based on the mass percent accounting for the total proportion of the material of the outer ring, the matrix structure is a Fe-C alloy body with the mass percent being 95-99%; and the anti-fatigue strength of the shaft sleeve ranges from 125 MPa to 155 MPa, the heat dissipation performance ranges from 25 W / (m.K) to 55 W / (m.K), and the bonding strength ranges from 25 MPa to 50 MPa. The invention further provides a preparation method of the motor end cover shaft sleeve. In the motor end cover shaft sleeve and the preparation method, porous foam pores are formed in the outer ring, by means of the pores, the mass of the shaft sleeve can be reduced, meanwhile, the combinability of the shaft sleeve and an end cover can be improved, the heat dissipation performance of the shaft sleeve is improved, heat transfer in the high-speed rotation process of a bearing is facilitated, and the risk of the thermal deformation failure of the bearing is reduced; and the inner ring is made of the solid material, is a working area where the shaft sleeve is in contact with the bearing, and has high wear resistance.

Description

technical field [0001] The invention relates to the technical field of motor production equipment, in particular to a motor end cover shaft sleeve and a preparation method thereof. Background technique [0002] The motor end cover refers to the cover located at both ends of the motor. It mainly plays the role of determining the spatial position of the rotor shaft, and at the same time has the functions of heat dissipation and dust prevention. In order to avoid the gap between the motor shaft and the shaft hole of the end cover caused by long-term use Wear, usually set between the sleeve and the shaft and the end cover to protect the shaft. During the working process, the rotating shaft and the shaft sleeve continuously produce relative motion, and a large amount of heat will be generated during the movement, so it has a high impact on the fatigue resistance, wear resistance, heat dissipation performance, strength, and hardness of the shaft sleeve. The shaft sleeves in the p...

AI Technical Summary

Problems solved by technology

During the working process, the rotating shaft and the shaft sleeve continuously produce relative motion, and a large amount of heat will be generated during the movement, so it has a high impact on the fatigue resistance, wear resistance, heat dissipation performance, strength, and hardness of the shaft sleeve. The shaft sleeves in the prior art have defects in structural design and materials, which lead to poor bonding between the shaft sleeve and the end cover, and the heat dissipation performance of the shaft sleeve is not ideal, which is not conducive to the heat transfer during the high-speed rotation of the bearing, resulting in Bearings are prone to thermal deformation failure

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