Introduction of high temperature bearing

High temperature bearing is a kind of bearing that can withstand high temperature. There are many kinds of high temperature resistant bearings. According to different needs and different environments, different types of bearings can be installed. Types of high temperature resistant bearings High temperature resistant bearings can be divided into: ordinary structure high temperature resistant bearings and special structure high temperature resistant bearings in terms of structure and technology. High temperature bearing environment High temperature bearing is widely used in metallurgy, kiln, glass, blast furnace, painting equipment and other high temperature operation machinery.

1. Types of high temperature resistant bearings 1. Ordinary types of high temperature resistant bearings Ordinary structure High temperature resistant bearings: mainly refers to the bearings designed according to the common bearing structure, using high temperature resistant materials such as high temperature resistant bearing steel, etc., mainly including high temperature resistant self-aligning balls Bearings, high temperature deep groove ball bearings, etc. (1) Self-aligning ball bearing High temperature self-aligning ball bearing: Between the inner ring of the two raceways and the outer ring of which the raceway is a spherical surface, two rows of steel balls guided by the retainer are assembled. Self-aligning ball bearings can bear a large radial load, and can also bear a certain axial load. Bearings with stamped steel cages are lubricated with high quality white high temperature grease and can be used in temperature environments from -40 to +300°C. It can meet the working conditions within 300 ℃. Bearings are usually produced with ordinary tolerances, and the clearance is much larger than ordinary bearings, so they are usually not suitable for high-speed operation. But it can usually run at 100 rpm for a long time. (2) Deep groove ball bearing high temperature resistant deep groove ball bearing: there is no retainer inside, only rolling elements; it can meet the working conditions of about 300 ° C, and is produced according to ordinary tolerances, and the clearance is much larger than ordinary bearings, so it is usually not It is suitable for high-speed operation and belongs to high-temperature and low-speed bearings, which can usually run for a long time at a speed of 200 rpm. 2. Special type of high temperature resistant bearing Special structure High temperature resistant bearing: not only the material is made of high temperature resistant material, but also the automatic compensation of clearance under high temperature environment is realized from the structure, such as coil spring bearing.

2. Imported high temperature resistant bearings Imported high temperature resistant bearings can not only work under high temperature and high pressure, but also bear the corrosion caused by high temperature; they also need to have the characteristics of non-magnetic conductivity, wear resistance, long life and high reliability. In addition, imported high temperature resistant bearings are also required to operate under special working conditions such as shock, vibration, tilt and swing with the drive mechanism, and the working environment and conditions of imported high temperature resistant bearings are quite demanding. The use requires that the bearings should not be stuck and the abnormal phenomenon of noise occurs during normal operation. At the same time, the imported high temperature resistant bearings need to withstand the influence of vibration, shock and other factors. performance.

Material selection According to the special working conditions of imported high temperature resistant bearings, the material of the ferrule and the ball should have the characteristics of high temperature resistance, corrosion resistance, wear resistance and non-magnetic. It is recommended to use G52# alloy for the ferrule and Si3N4 or cermet for the ball.