No lubrication bearing bush materials mainly polymers, carbon graphite and three types of special ceramics.
(1) polymer polymer and say plastic, as mechanical engineering material use plastic called engineering plastic. It is based on synthetic resin as the main component, still contain various plasticizers, stabilizer, antioxidants, anti-static agent, flame retardant, curing agent, strengthen material and organic polymer materials of stuffing.
There are many kinds of polymer, according to its characteristics into thermoplastic and thermosetting two kinds big.
The main common thermoplastic polymer are: polyamide, get together acetal, polyethylene, polypropylene, ptfe, poly (amino ester etc. They are with linear or a chain of fractal structure organic polymer compound, can soften and cooling heating and harden. Thermoplastic plastic injection, extrusion available, blow molding, rolling process method to shape.
Thermosetting polymers commonly used mainly has phenolic resin, epoxy resin, etc. They add catalyst in the course of processing or to curing agent, once the curing completed, it will become must never molten solid materials. Thermosetting polymers compression, laminated, available casting method to shape.
Commonly used plastic production bearing, guide, piston rings friction pair parts, such as water pump bearing, rolling mill bearing, the stern bearings, especially can use plastic make no lubricating bearings. Will ptfe polythene sheet material pressed into lip seals, bearings, piston ring and gasket, successfully applied in the belt conveyor, typewriter, the sewing machine, the record player discs, water pump, textile machinery and agricultural machinery, and other equipment.
Polymer is qualitative light, insulation, reducing friction and wear resistance, self-lubrication, corrosion resistance, molding process simple, production efficiency etc. And metal materials comparison, their tribological properties on the environment temperature and humidity sensitive, and viscoelastic related characteristics significantly, the mechanical strength and the elastic modulus of small for lubricating oil adsorption poor.




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