High temperature bearings: First and foremost, they are resistant to high temperatures. There are many kinds of high temperature resistant bearings, and different types of bearings can be installed according to different needs and different environments.

category

The high temperature resistant bearings can be divided into: structural high temperature resistant bearings and special structural high temperature resistant bearings.

Use environment

High temperature bearings are widely used in high temperature operation machinery such as metallurgy, kiln, glass, blast furnace, painting equipment.

High temperature resistant type

Ordinary structure high temperature bearing: mainly refers to the bearing designed according to the common bearing structure, using high temperature resistant materials such as high temperature bearing steel, etc., mainly bearing high temperature self-aligning ball bearing, high temperature deep groove ball and other bearings.

Self-aligning ball bearing

High-temperature self-aligning ball bearing: between the inner ring of the two raceways and the outer ring of the spherical raceway, equipped with two rows of steel balls guided by the retainer. Self-aligning ball bearings can withstand large radial loads while also withstanding certain axial loads.

The bearing has a stamped steel cage that is lubricated with high quality white high temperature grease and can be used in temperatures from -40 to +300 °C. Can meet the working conditions within 300 °C.

Bearings are usually produced to normal-grade tolerances, and the clearance is much larger than that of ordinary bearings, so it is usually not suitable for high-speed operation. However, it can usually be operated for a long time at a speed of 100 rpm.

Deep groove ball bearing

High temperature resistant deep groove ball bearing: no internal retainer, only rolling element; can meet the working conditions of about 300 °C, produced according to the normal tolerance, and the clearance is much larger than the ordinary bearing, so it is usually not suitable for high speed operation, it is low temperature Speed bearings are usually operated for a long time at 200 rpm.

High temperature resistant special type

Special structure high temperature bearing: not only the material is made of high temperature resistant material, but also the structure automatically realizes the automatic compensation of the clearance under high temperature environment, such as spiral spring bearing.

Imported bearing

Imported high temperature resistant bearings not only work under high temperature and high pressure, but also with high temperature corrosion; they also need to be non-magnetic, wear resistant, long life and high reliability. In addition, imported high-temperature bearings are required to operate under the special working conditions of shock, vibration, tilting and rocking with the driving mechanism. The working environment and conditions for imported high-temperature resistant bearings are quite demanding.

Requirements

In normal operation, the bearing can not be stuck and the noise is abnormal. At the same time, the imported high-temperature bearing needs to withstand the influence of vibration, shock and other factors. The material used for the bearing must be resistant to wear, non-magnetic and corrosion.

material selection

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