Difference between self lubricating bearing and oil bearing

The bearing is used to support the components, but also used to support the rotating parts on the shaft. According to the conflict nature, the types of self-lubricating sliding plate bearing are divided into sliding bearing and rolling bearing; according to the direction of bearing load, there are centripetal bearing, propulsion bearing, centripetal thrust bearing, etc.

1、 Oil bearing
The sintered body made by powder metallurgy with metal powder as the main raw material for oil bearing is porous, and has the technical advantages of adjusting the number, size, shape and distribution of pores in the manufacturing process. By using the porosity of the sintered body, 10% - 40% (volume fraction) of smooth oil can be impregnated into the sintered body, and it can be used under the condition of self supplying oil. During operation, the bearing temperature rises because the expansion coefficient of oil is larger than that of metal, so it automatically enters the sliding surface to smooth the bearing. Oil bearing can be used for a long time by adding oil once, which is often used in inconvenient oiling occasions.

2、 Solid inlaid self smooth bearing
The metal base inlaid solid self smooth bearing is a new type of smooth bearing which has both the characteristics of metal bearing and self smooth bearing. The metal matrix bears the load, and the solid smooth data with special formula plays a smooth role. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance, self smooth ability and so on. It is especially suitable for heavy load, low speed, reciprocating or shaking occasions which are difficult to smooth and form oil film, and is not afraid of water erosion and other acid etching and scouring. Inlaid bearing not only saves oil and energy, but also has longer working life than ordinary sliding bearing. Now the products have been widely used in metallurgical continuous casting machine, rolling equipment, mining machinery, ships, steam turbines, water turbines, injection molding machines and equipment production lines.

3、 Difference between oil bearing and self smooth bearing
1. The results show that the oil bearing is formed by the combination of metal powder, with 10-40% knot and space; the self smooth bearing matrix is made by centrifugal casting; the density of the matrix is relatively high, the bonding strength is higher than that of the oil bearing, and the service life is longer than that of the oil bearing;
2. The smooth raw material of oil bearing is smooth oil, and the oil film has enough thickness to eliminate the direct contact between the two conflicting surfaces. At the moment, there is only the conflict between liquid molecules, so the conflict coefficient is very small (F = 0.001-0.008), which significantly reduces the conflict and wear. The smooth material embedded in the self smooth bearing is solid smooth data, which can still remove the excellent smooth effect even under the oil-free condition, which can ensure the smooth non-stop and sustainable, and its useful smooth life is together with the life of the matrix;
3. The smooth oil in the oil-bearing is volatile and easy to lose. The smooth oil film can not get the smooth effect when it is thrown away under high temperature and high pressure. However, in the graphite copper sleeve, the solid lubricant in the hole or groove is transported or reversed to the conflict surface after collision, forming a smooth, solid adhesion and uniform covering solid transport film on the impact surface, which is greatly reduced Low conflict wear. With the conflict going on, the embedded solid smoother is continuously supplied to the impact surface to ensure the excellent smoothness of the conflict pair during long-term operation.

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