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Dry friction self-lubricating slide bearing

A sliding bearing and self-lubricating technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of poor adhesion, achieve the effect of less heat generation, less damage to the grinding shaft, and promote the overall performance

Inactive Publication Date: 2009-04-22
JIANGSU CCVI BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has poor adhesion on the dual material, which is the main cause of severe wear, so what kind of substance is added to PTFE can make the bearing have a smaller friction coefficient under dry friction conditions and at the same time improve the bearing performance. Wear resistance has become a common concern in the technical circles

Method used

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  • Dry friction self-lubricating slide bearing

Examples

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Embodiment 1

[0032] Such as figure 1 As shown, the present invention is formed by rolling a three-layer composite material, and the three-layer composite material includes a low-carbon steel plate 3, a spherical porous copper powder layer 2 sintered on one side of the steel plate, and an anti-friction and wear-resisting layer infiltrated and covered with the copper powder layer. Material layer 1 and copper powder layer 2 are composed of 8% tin powder, 3% zinc powder, and the rest are copper powder; the weight percentage of anti-friction and wear-resistant material layer 1 is composed of: 40% polytetrafluoroethylene Ethylene, 15% polyimide, 3% molybdenum disulfide, 42% tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA).

[0033] Its manufacturing method includes the following steps:

[0034] A, sintering the copper powder layer 2 on the low carbon steel plate 1;

[0035] B. Spreadable software for making anti-friction and wear-resistant layer 1:

[0036] a, with powder, by w...

Embodiment 2

[0046] The anti-friction and wear-resisting material layer 1 of the present invention is composed of: 55% polytetrafluoroethylene, 12% polyimide, 5% molybdenum disulfide, 28% tetrafluoroethylene-perfluoroalkoxy Base vinyl ether copolymer (PFA), all the other material structures and manufacturing method are all the same as embodiment 1.

Embodiment 3

[0048] The anti-friction and wear-resisting material layer 1 of the present invention is composed of: 60% polytetrafluoroethylene, 10% polyimide, 6% molybdenum disulfide, 24% tetrafluoroethylene-perfluoroalkoxy Base vinyl ether copolymer (PFA), all the other material structures and manufacturing method are all the same as embodiment 1.

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Abstract

The invention discloses a dry friction self-lubricating sliding bearing which is obtained by rolling three layers of composite materials. The three layers of composite materials comprise a metal substrate; a spherical porous copper powder layer which is sintered on one surface of the metal substrate; and an anti-friction wear resistant material layer which permeates and covers the copper powder layer, wherein, the copper powder layer consists of the following components by weight percentages: 8% of tin powder, 3% of zinc powder and copper powder; the anti-friction wear resistant material layer consists of the following components by weight percentages: 40-60% of polytetrafluoroethylene, 10-15% of polyimide, 3-6% of molybdenum disulfide and tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA). The dry friction self-lubricating sliding bearing has the advantages of small initial friction coefficient, less heat production, easy formation of a transfer membrane, minimal damage to a grinding shaft and the like; meanwhile, the application of the bearing can be expanded to fields of food, pharmacy, beverage, hydrotechnics, medical machinery and the like as manufacturing raw materials do not contain hazardous substances such as lead, toluene and the like.

Description

technical field [0001] The invention relates to a sliding bearing, in particular to a sliding bearing made of multilayer composite material, and belongs to the technical field of bearings. Background technique [0002] The three-layer composite bearing in the oil-free lubricating bearing is created by the British Gracia Company, referred to as DU. Its products are based on thin sheet steel, with a spherical porous bronze powder layer sintered in the middle, and the surface is rolled with lead-based mixture mainly made of polytetrafluoroethylene (PTFE), which penetrates into and covers the above copper powder layer and is sintered to become Anti-friction and wear-resistant layer. Finally, the above-mentioned three-layer composite sheet is rolled into sleeve-shaped bearings of different sizes according to the size of the shaft. The DU type bearings produced all over the world are SF-1 type in China, which have been widely used in high, medium load, low speed and other occasi...

Claims

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Application Information

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IPC IPC(8): F16C33/12F16C33/14
Inventor 王大力邓晓霖
Owner JIANGSU CCVI BEARING
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