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Light low-friction-coefficient high-abrasion-resistance sliding bearing and preparation method thereof

A low friction coefficient, sliding bearing technology, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problems of poor creep resistance and thermal conductivity, low friction coefficient, poor wear resistance, etc., to achieve matrix stability, The effect of excellent performance and good lubricating effect

Inactive Publication Date: 2018-09-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of bearing wear resistance, vibration reduction and noise reduction and strength, etc., the present invention overcomes the characteristics of poor wear resistance, low hardness, poor creep resistance and thermal conductivity of bearings made of single filling PTFE, and uses a specific The proportioned micron-sized hard ceramic particles and short carbon fibers are filled in the highly corrosion-resistant PTFE material, and according to the molding characteristics of the PTFE material, it is combined with the filled micron-sized hard ceramic particles and Combined with short carbon fibers, the post-processing is a low friction coefficient and high wear-resistant sliding bearing; this new type of sliding bearing made of hard ceramic particles and short carbon fibers filled with a specific ratio of PTFE matrix, at the same time has the high hardness of hard ceramic particles, The characteristics of wear resistance, lubricity and low specific gravity of short carbon fiber and low temperature resistance improve the comprehensive performance of sliding bearings, effectively reduce the friction coefficient and wear rate, improve the bearing strength and prolong the service life of bearings

Method used

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  • Light low-friction-coefficient high-abrasion-resistance sliding bearing and preparation method thereof
  • Light low-friction-coefficient high-abrasion-resistance sliding bearing and preparation method thereof
  • Light low-friction-coefficient high-abrasion-resistance sliding bearing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] To prepare a light-weight, low-friction coefficient and high wear-resistant sliding bearing, the steps are as follows:

[0034] Step 1. Weigh micron-sized hard ceramic particle silicon carbide, short carbon fiber and PTFE material, wherein the proportion of filler is 5wt% by weight of silicon carbide, 15wt% by weight of short carbon fiber, and the balance is polytetrafluoroethylene vinyl. The particle size range of micron-sized hard ceramic particles silicon carbide is 0.1-0.4 microns, the short carbon fiber is passed through a 400-mesh sieve, and the polytetrafluoroethylene is PTFE powder with an average particle size of 10-30 microns. When stirring and mixing, weigh 7.5 g of silicon carbide, 22.5 g of short carbon fiber, and 120 g of PTFE.

[0035] Step 2: Mix the micron-sized hard ceramic particles, short carbon fibers and PTFE powder weighed in Step 1, and perform mechanical stirring.

[0036] Step 3. Evenly spread the mixture stirred in Step 2 into a mold, and pe...

Embodiment 2

[0040] Example 2: Preparation of a light-weight, low-friction, high-wear-resistant sliding bearing. The preparation steps are basically the same as in Example 1. The only difference is that the composition ratio of raw materials in step 1 is different, that is, the micron-sized hard ceramic particles of silicon carbide The weight percentage is 10 wt%, the weight percentage of the short carbon fiber is 10 wt%, and the balance is polytetrafluoroethylene. When stirring and mixing, weigh 15 g of silicon carbide, 15 g of short carbon fiber, and 120 g of PTFE.

Embodiment 3

[0041] Example 3: Preparation of a light-weight, low-friction, high-wear-resistant sliding bearing, the preparation steps of which are basically the same as in Example 1, the only difference being: the composition ratio of raw materials in step 1 is different, that is, the micron-sized hard ceramic particles of silicon carbide The weight percent is 15wt%, the short carbon fiber is 5wt%, and the balance is polytetrafluoroethylene. When stirring and mixing, weigh 22.5 g of silicon carbide, 7.5 g of short carbon fiber, and 120 g of PTFE.

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Abstract

The invention discloses a light low-friction-coefficient high-abrasion-resistance sliding bearing and a preparation method thereof. A sliding face of a bearing body is constituted by a PTFE-based composite material and an anodized aluminum alloy which are matched. The PTFE-based composite material comprises, by weight, 3-20% of micron-class hard ceramic particles, 3-20% of short carbon fibers andthe balance teflon. The preparation method comprises the steps that the micron-class hard ceramic particles, the short carbon fibers and PTFE powder are weighed to be mechanically stirred; a stirred mixture is evenly laid in a mold, and cold press molding is conducted under the room temperature to obtain a prefabricated piece; the prefabricated piece is placed into a muffle furnace to be sintered;and the obtained PTFE-based composite material is processed and matched with the anodized aluminum alloy to constitute the sliding face of the bearing body, and finally the obtained light low-friction-coefficient high-abrasion-resistance sliding bearing has the extremely-high vibration and noise reduction property, extremely-high abrasion resistance, extremely-high corrosion resistance and the low friction coefficient, and is good in strength.

Description

technical field [0001] The invention relates to the technical field of bearing materials, in particular to a sliding bearing with low friction coefficient and high wear resistance and a preparation method thereof. Background technique [0002] As a bearing material matrix, polytetrafluoroethylene has excellent chemical corrosion resistance and a relatively low friction coefficient, but its wear resistance is relatively poor, and its mechanical properties and creep resistance are poor, especially its wear resistance. Low surface energy and poor adhesion make simple PTFE materials unfavorable for making wear-resistant bearings. These defects limit the wide application of this material to a certain extent. Therefore, in-depth research on the properties of PTFE and development New PTFE-based composite materials have become the main research and development direction of bearing materials. [0003] In order to make full use of the good performance of polytetrafluoroethylene and e...

Claims

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Application Information

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IPC IPC(8): F16C33/12F16C33/14C25D11/10
CPCC25D11/10F16C33/121F16C33/14F16C2204/20F16C2206/40F16C2208/32
Inventor 闫帅林彬王安颖魏驰彬王振扬
Owner TIANJIN UNIV
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