Composite material for bearings as well as preparation method and application of composite material

Abstract

The invention discloses a composite material for manufacturing high-speed light-load oil-free lubrication bearings. The composite material is prepared by taking polytetrafluoroethylene as a base material, filling proper antifriction toughening materials such as glass fiber, copper powder, graphite, molybdenum disulfide and carbon fiber and carrying out synthesis and sintering. The composite material has the advantages of being small in frictional coefficient and low in frictional abrasion when in friction with high-speed moving parts such as carbon steel and the like under the condition of micro-oil or oil-free lubrication, can be widely used for manufacturing the water-based liquid lubricated sliding bearings, also can be used for manufacturing the high-speed light-load oil-free or micro-oil sliding bearings, is particularly suitable for the industries of ocean operation tools, textile machinery and food machinery, and has the characteristics of low cost and simple manufacturing process.

Description

technical field [0001] The invention relates to a material for manufacturing bearings, in particular to a composite material suitable for manufacturing high-speed light-load oil-free lubricating bearings and its preparation method and application. Background technique [0002] Currently used bearings, whether they are rolling bearings or sliding bearings, require liquid lubricants for lubrication, so a supply system for lubricating oil must be provided in mechanical equipment. However, the sealing of lubricating oil in many machines and equipment is not enough, or the sealing parts are mechanically worn during use. For example, after long-term use of high-speed sewing machine bearings, oil leakage will occur and pollute fabrics and clothing. Therefore, the best solution is to use non-toxic Oil lubricated bearings. In recent years, self-lubricating bearings and their materials have been invented. Although there is no need to add lubricating oil during use, there are still ma...

AI Technical Summary

Problems solved by technology

A kind of self-lubricating bearing disclosed in CN2050904U Patent Announcement adopts a mechanical method to achieve the purpose of self-lubricating, and a movable bush is arranged between the two moving pairs, and polytetrafluoroethylene is used as the isolation belt; Wrinkled, unable to shrink and recover after cooling, short service life

A self-lubricating iron-based wear-resistant alloy published in CN1040627A patent application is a kind of oil-containing bearing material. During the process of making bushes and sleeves, it needs to be filled with lubricating oil. When it is heated, it will overflow and be sucked after cooling, so the material must leave an oil-filled gap; therefore, the mechanical strength is low, and it is not suitable for high-speed applications.

Recently, Japan invented an oil-free lubricating bearing material, which contains 7% graphite by weight. Due to the high graphite content, its mechanical strength is low, and the wear of the pair is too large.

Patent CN101936340B discloses a fiber-reinforced resin-based self-flowing oil composite sliding bearing and its manufacturing method. The bearing includes an inner layer and a backing. The inner layer uses polytetrafluoroethylene as the matrix material, and is made of suspended self-lubricating polytetrafluoroethylene resin powder. It is mixed with at least one of graphite, molybdenum disulfide, tin bronze powder, glass fiber and carbon fiber to make a self-lubricating polytetrafluoroethylene soft belt, and the backing is made of alkali-free long fiber and epoxy resin; Since the ratio of the inner material is not disclosed, there is suspicion of insufficient disclosure