The sintered body made of powder metallurgy method is porous and has the technical advantages of adjusting the number, size, shape and distribution of pores more freely in the manufacturing process. Using the porosity of the sintered body, it is impregnated with 10%~40% (volume fraction) of lubricating oil, and is used in the state of self-oil supply. During operation, the temperature of the bearing rises, and since the coefficient of expansion of oil is greater than that of metal, it automatically enters the sliding surface to lubricate the bearing. Oil-impregnated bearings can be used for a long time with a single oil, and are often used in occasions where refueling is inconvenient.
Pictures of oil-impregnated bearings
Metal-based inlaid solid self-lubricating bearing is a novel lubricated bearing with both the characteristics of metal bearing and self-lubricating bearing, which is loaded by the metal matrix and lubricated by a specially formulated solid lubricating material. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance, strong self-lubrication ability, etc., especially suitable for heavy load, low speed, reciprocating or swinging and other occasions that are difficult to lubricate and form oil film, and are not afraid of water erosion and erosion of other acids. The inlaid bearing is not only fuel-saving and energy-saving, but also has a longer working life than ordinary plain bearings. At present, the products have been widely used in metallurgical continuous casting machines, steel rolling equipment, mining machinery, ships, steam turbines, water turbines, injection molding machines and equipment production lines.