Sliding bearing of the bearing shell structure and bearing material

Bearing material bearing shell is divided into split and integral structure. In order to improve the bearing surface friction properties, often in its inner casting on the surface of a layer or two layers of anti-friction material, usually referred to as the bearing bush, so bearing shell and bimetallic bearing shell and three metal bearing shell. Integral split of casting bearing alloy bearing material bearing or bearing is one of the important parts, sliding bearing bush and bearing liner materials referred to as the bearing materials. Because of bearing or bearing bush, direct contact with shaft neck shaft neck part compared commonly wear-resisting, thus the main failure form of bearing is wear. Bearing wear and journal of materials and bearing their own materials, lubricants and lubrication condition is directly related to the bearing shell materials should consider these factors, in order to improve the service life of the sliding bearing and work performance. Bearing materials are: 1) Metal materials, such as bearing alloy, bronze, aluminum alloy, zinc base alloy, etc. ; 2) Porous metal materials ( Powder metallurgy materials) ; 3) Nonmetallic material. Including: bearing alloy: bearing alloy is also called the white metal, tin, lead, antimony and other metal alloy, because of its good wear resistant, high plasticity, running-in performance is good, good thermal conductivity and good resistance to adhesive and and good and oil adsorption, thus suitable for overloading, high-speed cases, the strength of the bearing alloy is small, the price is more expensive, must be casting in bronze, steel or cast iron shell and form a thin coating. Porous metal materials, porous metal is a kind of powder material, it has porous organization, if the immersion in the lubricating oil, full of lubricating oil in the pores, into the oil bearing, has self lubricating performance. The toughness of the porous metal material is small, only suitable for smooth without impact load and medium and small speed. Commonly used bearing bearing plastic: plastic with phenolic plastics, nylon, ptfe and so on, plastic bearings have larger compressive strength and abrasion resistance, oil and water lubrication, also has the self-lubricating properties, but poor thermal conductivity.