Explanation

sintering bearings such as solid lubricant and metal powder are used. General bearings need to be externally lubricated and selfoiling bearing needs to be immersed in oil. They are externally lubricated bearings. Bearings made of solid lubricant with low friction coefficient and sintered aluminum copper soft metal and metal powder. Homogeneous lubricant can continuously generate lubricating film to lubricate bearings without additional lubricant. Both rolling and sliding bearings can use this method. This kind of bearing is often manufactured by hot pressing process: sintering porous copper bearing, vacuum infiltrated MoS2, pressing densification MoS2 Cu bearing, which can overcome the difficulty of MoS2 volatilizing at high temperature and retaining the characteristics of MoS2. Silver or gold plated lubricated bearings are also a practical process. In the high-frequency vacuum tube with multi frequency emission, a self-lubricating rolling bearing with a rotating speed of more than 1500r/min is required. During operation, the self-lubricating (or co lubricating) agent shall not be volatilized, the friction coefficient under vacuum shall be less than 0.2, and the rolling wear amount in vacuum shall be 6-7mg/1000h. This is a typical data of self-lubricating bearing, which is used in advanced equipment such as large electronic tubes and X-ray tubes. rolling bearings for automobiles are usually made of PTFE fluoroplastic as solid lubricant.

Classification