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Bearing bush and process thereof for spraying MoS2 on alloy layer

A technology of alloy layer and bearing bush, applied in the direction of coating, bearing components, shaft and bearing, etc., can solve the problems of bearing bush alloy layer or coating peeling off, and achieve the effect of improving service life, reducing pollution and good anti-dry wear performance.

Active Publication Date: 2013-05-29
YANTAI CHUNSHENG SLIDING BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a bearing bush, which solves the problem that the alloy layer or coating of the bearing bush often peels off in the prior art

Method used

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  • Bearing bush and process thereof for spraying MoS2 on alloy layer
  • Bearing bush and process thereof for spraying MoS2 on alloy layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] When the alloy layer 2 is an aluminum alloy layer, the production process of the bearing bush includes the following steps:

[0040] 1) Cleaning: place the fine-bored aluminum alloy bearing bush (including the fixedly connected steel back layer 1 and the aluminum alloy layer) in an ultrasonic cleaning machine filled with a neutral cleaning agent for cleaning, at a temperature of 60-70°C and for a time of 2 -8 minutes;

[0041] 2) Activation: Clean the above parts in an acidic aluminum activator at a temperature of 45-60°C for 1-5 minutes;

[0042] 3) Washing with water; put the above parts in tap water, wash at least once at room temperature, each time for 1 minute, until the acidic aluminum activator on the parts is cleaned;

[0043] 4) Aluminum phosphating; put the above parts in the aluminum phosphating agent at a temperature of 35-55°C for 2-9 minutes;

[0044] 5) Rinse in cold water; place the above parts in deionized water at room temperature for 1 minute;

[004...

Embodiment 2

[0052] When the alloy layer 2 is a copper-lead alloy layer, the production process of the bearing pad includes the following steps:

[0053] 1) Cleaning: place the copper-lead bearing bush after fine boring in an ultrasonic cleaning machine filled with a neutral detergent for cleaning at a temperature of 60-70°C for 2-8 minutes;

[0054] 2) Activation: Clean the above parts in copper activator at a temperature of 30-75°C for 2-5 minutes;

[0055] 3) Washing with water; place the above parts in tap water and wash at least once at room temperature for 1 minute each time until the copper activator on the parts is cleaned;

[0056] 4) Copper passivation; place the above parts in molybdenum chromate at a temperature of 50-85°C for 2-8 minutes;

[0057] 5) Rinse in cold water; place the above parts in deionized water at room temperature for 1 minute;

[0058] 6) Rinse with hot water; place the above parts in deionized water at a temperature above 65°C for 1 minute;

[0059] 7) Sp...

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Abstract

The invention provides a bearing bush and a process thereof for spraying MoS2 on an alloy layer for solving the problem that the alloy layer or the plated layer of the bearing bush peels off frequently. The bearing bush comprises a steel backing layer and the alloy layer fixedly arranged. The alloy layer is provided with a spraying layer fixed with the alloy layer. The alloy layer is one of an aluminum alloy layer or a copper-lead alloy. The spraying layer comprises a PI (Polyimide) resin layer, a MoS2 layer and a PAR (Parylene) lubricating coating sequentially arranged. The PI resin layer is contacted with the alloy layer. The bearing bush can effectively improve the dry grinding resistance, the anti-occlusion performance, the corrosion resistance and the wear resistance through the MoS2 layer by arranging the spraying layer on the alloy layer, the problem that the inner surface of the bearing bush in the installation and use process is scratched is solved, and the service lives of the bearing bush and lubricating oil in the bearing bush are prolonged. The bearing bush is good in practicality, and the whole manufacturing process of the bearing bush is safe and environment-friendly, so that the environmental pollution can be reduced.

Description

technical field [0001] The invention relates to the technical field of bearing bushes, in particular to a bearing bush with an alloy layer and a production process for spraying MoS2 on the alloy layer. Background technique [0002] At present, there are generally two types of bearing pad materials used in high-horsepower diesel engines in our country, one is aluminum-based materials, and the other is copper-lead materials. In general, the pressure on the main bearing bush is relatively small, so the main bearing bush is generally made of aluminum-based materials, and the connecting rod bush is generally made of copper-lead material because of the high blast pressure that the engine bears during the operation of the engine. . The fatigue strength of copper-lead materials is above 125 MPa, which is far greater than that of aluminum-based materials. Since the alloy layer of aluminum-based materials is relatively soft, electroplating is generally not required, while copper-lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/04F16C33/20B05D7/14B05D7/24B05D3/00B05D3/10B05D3/02B05D3/12
Inventor 于贵海孙淑利
Owner YANTAI CHUNSHENG SLIDING BEARING
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