Three layer composite self-lubricating sliding bearing with modified polyimide wear layer and preparation method thereof

A technology of polyimide and sliding bearings, which is applied in the direction of sliding contact bearings, rotary motion bearings, linear motion bearings, etc., can solve the problems of complex manufacturing process, inapplicability, low output, etc., and the efficiency and manufacturing cost are obvious , excellent electrical insulation, and the effect of improving technical indicators

Active Publication Date: 2012-02-08
ZHEJIANG CHANGSHENG SLIDING BEARINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in this bearing: ①The manufacturing process is too complicated. The first step to obtain a high-performance sliding bearing is to control the production process and quality of the modified PEEK film to ensure that its performance meets the design requirements; the second step is to pass temperature, Pressure ensures the bonding strength of PEEK film and porous copper powder composite sheet
Therefore, the production cost is high, the output is low, the product quality is low, and the product consistency and stability are not good enough.
② There is still room for improvement in performance, especially the glass transition temperature is only 143°C, which cannot be applied to high temperature 300°C working conditions

Method used

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  • Three layer composite self-lubricating sliding bearing with modified polyimide wear layer and preparation method thereof
  • Three layer composite self-lubricating sliding bearing with modified polyimide wear layer and preparation method thereof
  • Three layer composite self-lubricating sliding bearing with modified polyimide wear layer and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0034] C. Preparation of paste: add polyimide solution to the mixture and stir together to make a paste of modified polyimide;

[0035] (2) Copper ball powder sintering: evenly spread spherical bronze powder on the steel plate and sinter together according to the prior art to form a porous copper powder composite board;

[0036] (3) Preparation: Stir the prepared modified polyimide paste for 10 minutes again before use;

[0037](4) Coating: On the surface of the preheated porous copper powder composite board, the modified polyimide paste is coated on the copper powder surface of the porous copper powder composite board by scraping, brushing and spraying In general, the thickness of the paste is generally 0.08-0.15mm; when the thickness of the paste is required to reach 0.30-0.60mm, the modified polyimide paste is extruded through a twin-screw extruder. Continuously coated on the porous copper powder composite board and scraped off;

[0038] (5) Modified polyimide sintering: ...

Embodiment 1

[0053] The test piece of embodiment 1 (with modified PI)

[0054]

[0055] Final PV value: 4.07 Final temperature: 130°C Final wear amount: 0.014mm Average coefficient of friction: 0.105

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Abstract

The invention discloses a three layer composite self-lubricating sliding bearing with a modified polyimide wear layer and a preparation method thereof. A layer of porous spherical bronze powder is sintered on a layer of a steel plate; a layer of modified polyimide wear resistant material is covered on the porous spherical bronze powder layer to prepare a sheet material of the self-lubricating sliding bearing; and the sheet material of the self-lubricating sliding bearing is prepared into products of a sliding bearing in a spindle sleeve shape or a thrust washer or a slide plate or a friction disc sheet or ball seat structural member. A production technology comprises steps of: preparing modified polyimide mash, sintering the spherical bronze powder, preparing, coating, sintering the modified polyimide, finishing rolling, cutting material and forming. The three layer composite self-lubricating sliding bearing with the modified polyimide wear layer of the invention has excellent performances of good rigidity, high strength, high temperature resistance, friction resistance and no lead, and is especially suitable for heavy load, variable load and high PV value sliding bearing.

Description

technical field [0001] The invention relates to a sliding bearing, in particular to a three-layer composite self-lubricating sliding bearing with a modified polyimide wear-resistant layer on the sliding surface and a manufacturing method thereof. Background technique [0002] In the 1970s, the British Glacier company came out with DU bearings. It is a sliding bearing made of three-layer composite materials. The lining layer of the friction layer is a mixture of polytetrafluoroethylene (PTFE) and lead (Pb) sintered. It is characterized by low Friction, wear resistance, self-lubrication, the emergence of DU bearings has replaced the traditional sliding bearings that must rely on oil lubrication. It is a subversive revolution in the field of sliding bearings, which greatly reduces material costs, reduces volume, and reduces labor costs and the environment. pollute. DU products have been used until now, but there are still many shortcomings in DU products. Firstly, it contains ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/20
CPCF16C2202/54F16C2208/40F16C17/12F16C29/02F16C17/00F16C33/02Y02T10/865F16C2208/32F16C33/208F16C33/20F16C33/14F16C2202/52F16C2220/20F16C33/1095F16C33/201F16C33/206F16C2223/32F16C2223/42F16C2220/44F16C2220/84F16C2220/82F16C2223/04F16C2220/48C09D179/08B05D5/086B05D2202/10B05D2350/65B05D2601/20C10M169/044C10M125/10C10M2201/041C10M2201/05C10M2201/066C10M2213/062C10M2217/0285C10M2217/0443B32B27/00B32B27/06B32B27/28B32B27/281B32B2307/50B32B2307/554B32B2307/746F16C2204/10F16C2240/08F16C2240/06C10N2020/06C10N2030/06C10N2050/025C08K3/04C08K3/30C08L27/18
Inventor 孙志华陆忠泉
Owner ZHEJIANG CHANGSHENG SLIDING BEARINGS
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