Bearing inner ring and preparation process thereof as well as self-lubricating joint bearing

Abstract

The invention relates to a bearing inner ring and a preparation process thereof as well as a self-lubricating joint bearing, and belongs to the technical field of a joint bearing. The bearing inner ring comprises a bearing inner ring base body and a film-coating layer; the surface of the bearing inner ring base body is provided with a nitriding layer subjected to nitriding treatment; and the film-coating layer is arranged on the surface of the nitriding layer. The nitriding layer on the surface of the bearing inner ring base body can effectively enhance the surface hardness of the surface of the bearing inner ring base body; the film-coating layer on the surface of the nitriding layer further improves the surface hardness and the wear resistance of the surface of the bearing inner ring; the friction coefficient of the surface of the bearing inner ring is reduced; and the liner scratching resistance of the surface of the bearing inner ring is improved. The preparation process of the bearing inner ring comprises the steps of preparing the nitriding layer on the surface of the bearing inner ring base body by a vacuum plasma nitriding method, and preparing the film-coating layer on thesurface of the nitriding layer by a physical vapor deposition method. According to a self-lubricating bearing, the bearing inner ring and a self-lubricating liner form a friction pair, so that the wear rate of the liner is reduced and the service life of the joint bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of joint bearings, in particular to a bearing inner ring, a preparation process thereof, and a self-lubricating joint bearing. Background technique [0002] Joint bearing is a kind of spherical sliding bearing. Its sliding contact surface is an inner spherical surface and an outer spherical surface. It can rotate and swing at any angle during motion. Made by special processing method. Joint bearings have the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, and good lubrication. [0003] In many impact conditions, such as aircraft landing gear and other parts, the rings of spherical plain bearings need to have impact resistance requirements, so the surface hardness of the rings is required not to be too high and have good fatigue impact resistance. However, the inner ring of existing self-lubricating spherical plain bearings is usually made of ...

AI Technical Summary

Problems solved by technology

However, the inner ring of existing self-lubricating spherical plain bearings is usually made of stainless steel, and the surface hardness is usually about 45HRC. During use, the anti-wear ability is weak, and the spherical surface is easily damaged by wear, which will accelerate the wear speed of the self-lubricating liner, resulting in the use of Insufficient life

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