Bearing bush with surface microporous structure and processing method

A surface microporous and microstructure technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of reducing the strength of the bearing bush, increasing the surrounding stress, unfavorable bearing bearing capacity, etc., so as to reduce the abrasive wear and stress. Less concentration, good oil storage effect

Active Publication Date: 2012-07-04
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

When the microstructure of the inner surface of the bearing pad is a groove-shaped corrugated structure, the oil film bearing capacity of the bearing pad is moderately im...

Method used

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  • Bearing bush with surface microporous structure and processing method
  • Bearing bush with surface microporous structure and processing method
  • Bearing bush with surface microporous structure and processing method

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Embodiment Construction

[0021] The microporous structure and processing method of the bearing are described in detail below:

[0022] see figure 1 , Figure 1A , the bearing pad has a bearing pad body 1, the body 1 is composed of a metal pad back 3 and an antifriction alloy layer 4, wherein the antifriction alloy layer 4 is a friction layer between the bearing pad and the journal.

[0023] see figure 2 , image 3 , the inner surface of the antifriction alloy layer 4 is processed with regularly arranged micropores 2 . The specific processing method is:

[0024] First, a layer of resin is coated on the inner surface of the friction-reducing alloy layer 3 on the bearing body 1, and the resin is thin and easy to remove.

[0025] Then clamp it into the inner side of the semi-circular tooling, and use a pulse laser, preferably a Nd:YAG pulse laser, to process micro-holes in the bearing bush. Among them, the main parameters of Nd:YAG pulsed laser are: (a) Laser wavelength: 1064nm; (b) Crystal: Nd:YAG...

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Abstract

The invention provides a bearing bush with surface microporous structures and a processing method. The bearing bush includes a bearing bush body, and the body comprises a metal bearing bush back and an antifriction alloy layer, wherein the antifriction alloy layer is a friction layer between the bearing bush and a journal. The bearing bush is characterized in that microporous structures are formed on the inner surface of the antifriction alloy layer through machining. The microporous structures are micropores formed by adopting the laser micromachining technique for machining, the micro-pores are arranged regularly, the diameters range from 150 micrometers to 200 micrometers, and the depths range from 35 micrometers to 50 micrometers. The bearing bush is provided with the microporous structures on the inner surface, can effectively improve the oil film bearing capability, and remarkably improves the lubrication effect.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, in particular to a main bearing bush or a connecting rod bearing bush of the engine, the surface of which has regularly arranged micropore structures. Background technique [0002] Bearing bush, as a kind of sliding bearing, is widely used in engines. The bearing pad is usually composed of a metal pad back and an anti-friction alloy layer, and forms a sliding friction pair with the crankshaft journal. The average effective pressure and speed of the engine are constantly increasing, so the requirements for the bearing capacity and lubricity of the bearing bush are constantly increasing. [0003] The inner surface of the existing engine bearing bush is usually smooth or has a grooved corrugated structure from a microscopic point of view. According to elastohydrodynamic theory and bionic research, the surface of the friction pair is not as smooth as possible. The surface of the friction...

Claims

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Application Information

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IPC IPC(8): F16C33/10F16C33/00
Inventor 戴基卉蒋继科林翰伍建撰
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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