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Environment-friendly bearing bush

A bearing bush and environmental protection technology, applied in the field of bearing bushes, can solve the problems of not meeting the technical development requirements of internal combustion engines, etc., and achieve the effects of fine grain size, improved hardness, and improved wear resistance.

Inactive Publication Date: 2016-11-23
WUHU MEIDA MECHANICAL & ELECTRONICS INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The bearing shell of the traditional structure can no longer meet the development requirements of internal combustion engine technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] See attached picture:

[0019] The environmental protection bearing bush includes the upper tile 1 and the lower tile 2 that are used in relative cooperation. The inner walls of the upper tile 1 and the lower tile 2 are provided with an alloy layer 3, and the alloy layer 3 is formed from the opposite surface of the upper tile and the lower tile. It gradually becomes thicker at the bottom of the center, and the alloy layer 3 is provided with an electroplated lead-free anti-friction layer 4 .

[0020] The alloy layer 3 adopts CuSn8Ni or CuSn10Bi4 material continuous casting coil, when using CuSn8Ni material continuous casting coil, the composition content is Sn: 7.0~9.0%, Ni: 0.7~1.3%, Cu: balance; when using CuSn10Bi4 When the material is continuously cast and rolled, the composition content of CuSn10Bi4 is Sn: 9~11%, Bi: 3~5%, Cu: the balance.

[0021] The electroplated lead-free antifriction layer 4 has an electroplated nickel grid layer 4-1, an inner tin-copper antif...

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Abstract

The invention discloses an environment-friendly bearing bush. The environment-friendly bearing bush comprises an upper bearing bush piece and a lower bearing bush piece which are oppositely coordinated with each other during use. An alloy layer is arranged on the inner wall of each of the upper bearing bush piece and the lower bearing bush piece. The thickness of each alloy layer gradually increases from the faying surfaces of the upper bearing bush piece and the lower bearing bush piece to the central bottom. An electroplated lead-free anti-friction layer is arranged outside each alloy layer. The environment-friendly bearing bush has the advantages that the alloy layers do not contain heavy metal lead elements, and the requirement of environment protection is satisfied; the raw materials of the bearing bush are continuously-cast coiled bands, the grain size of alloy components is small, and high application performance is achieved; the gradually-reduced wall thickness of the bearing bush allows the bearing bush to form a reasonable oil film clearance after assembling; the electroplated lead-free anti-friction layers are lead-free double-layer tin-copper-plated layers, the hardness of the anti-friction layers is increased, lead elements are avoided during machining and use, and environment protection is achieved while the wear resistance of the bearing bush is increased.

Description

Technical field: [0001] The invention relates to a bearing bush, in particular to an environment-friendly bearing bush. Background technique: [0002] The role of the bearing pad is not only to protect the crankshaft journal, but also to prevent the early wear of the crankshaft journal when the friction pair of the bearing pad is in the state of boundary lubrication or mixed lubrication during frequent start and stop, so as to protect the operation reliability of the crankshaft. Advanced engine technology places higher and higher demands on bearing pads; more frequent starts, stops or hybrid engines will lead to early wear of the bearing pads. The increase in engine burst pressure and the lightweight of the engine increase the load on the bearing pad. Low-viscosity oils, roughened crankshaft surfaces, and higher temperatures aggravate early bearing pad wear. [0003] Bearing shells with traditional structures can no longer meet the development requirements of internal comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/06F16C33/12C22C9/02C25D5/12
CPCC22C9/02C25D5/12F16C33/06F16C33/121F16C33/122F16C2204/12
Inventor 胡晓文
Owner WUHU MEIDA MECHANICAL & ELECTRONICS INDAL