Self-lubricating slide bearing by oil lubrication or grease lubrication

Abstract

The invention discloses a self-lubricating sliding bearing applicable to the working conditions of oil lubrication or grease lubrication. The sliding bearing is obtained by rolling three layers of composite materials which are respectively 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 that permeates and covers the copper powder layer, wherein, the copper powder layer consists of the following components by weight percentage: 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 percentage: 35-50% of polytetrafluoroethylene, 10-15% of polyether-ether-ketone, 10-15% of carbon fiber, 3-6% of molybdenum disulfide and tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer. The self-lubricating sliding bearing has good friction and wear resistant property under the conditions of the oil lubrication and the grease lubrication, and has excellent friction and wear resistant property especially under the alternative working conditions of the oil lubrication and the grease lubrication, the oil lubrication and dry friction or the grease lubrication and the dry friction.

Description

Technical field [0001] The invention relates to a sliding bearing, in particular to a sliding bearing made of multi-layer composite materials, and belongs to the technical field of bearings. Background technique [0002] The British company Gracia created a three-layer composite bearing among oil-free lubricating bearings, referred to as DU. Its product uses a thin steel plate as the base, with a spherical porous bronze powder layer sintered in the middle, and a lead-containing mixture mainly made of polytetrafluoroethylene (PTFE) on the surface, which penetrates and covers the copper powder layer and is sintered. Anti-friction and wear-resistant layer. Finally, the above three-layer composite plate is rolled into sleeve-shaped bearings of different sizes according to the size of the shaft. DU type bearings produced all over the world, known as SF-1 type in China, have been widely used in high and medium load, low speed and other occasions. However, due to the escape of l...

AI Technical Summary

Problems solved by technology

However, the bronze powder layer of this scheme still contains some lead, and the mixture is treated with toluene and aluminum nitrate during manufacture, so it will still cause pollution

[0004] Generally, bearings made of three-layer composite self-lubricating materials are mostly used in dry friction conditions, but for the working conditions of pre-coated grease or dripping lubricating oil, the effect is often very unsatisfactory

And the shaft sleeve often needs to add grease or lubricating oil during use, which causes inconvenience to the use process

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