Self-lubricating bearing according to accept load can be divided into two different categories: respectively is centripetal sliding self-lubricating sliding self-lubricating bearing and thrust bearing, the centripetal sliding self-lubricating bearings mainly is accepting some of radial load, sliding self-lubricating bearings, thrust main axial load.
Sliding self-lubricating bearing he is applicable places are generally low speed, high precision, overload and structure requirements of subdivision.Scroll of self-lubricating bearing small friction coefficient, produce less heat;Wear less, adhere to the good precision;Suitable for high speed running.But the capacity is a bit poor, poor vibration resistance.
Self-lubricating bearing has been widely used in hydroelectric equipment in China, compared with the copper tile hydroelectric equipment used in bearing, nylon has better lubrication journal bearing.Copper tile bearing the use of high cost, it needs to adopt dry lubrication oil, process is complicated, and is not conducive to environmental protection, in addition, its bearing capacity is low, high compressive stress.And nylon bearing will increase the size of the unstable factors, lead to holding shaft bearing phenomenon, increase the risk of the equipment operation.
Metallographic structure.This bearing is mostly produced by powder metallurgy technology, it product alloy material is contained in the bearing alloy thin wall layer sintering on the steel substrate, which will contain solid graphite lubricant evenly spread throughout the bronze or lead bronze metal substrate.In order to constitute a low friction, can be composed of graphite and ptfe membrane, in film, on the surface of the bearing.
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