Bearing operating temperature is an important index

Therefore, the operation temperature of low-temperature bearings reflects the material technology and processing level of bearing processing.Its measurement is mainly based on the temperature difference between the outer ring of the bearing and the injected cooling oil during operation.

Lower operating temperature means longer service life and higher performance of bearings.The world famous bearing manufacturers, relying on their own advantages, strive to obtain the comparative advantage of low temperature bearings in many fields.

Take Timken self-aligning roller bearings as an example. After rigorous testing, the operating temperature of such products of the company is lower than that of similar products in the market, at about 15.5 degrees Celsius, while other well-known international brands are above 19 degrees Celsius.

2. Commonly used low temperature bearings are

Single row deep groove ball bearings and cylindrical roller bearings

For the bearing stuck at low temperature, the external factor is the change of temperature, and the internal factor is the different thermal expansion coefficient of the shaft, the frame and the material.When the temperature range is large, the shrinkage rate of different materials is different, leading to the gap becomes smaller and stuck.Therefore, for a wide range of equipment, including equipment used at low temperatures, it is necessary to calculate the coefficient of expansion of materials, and try to use materials with similar coefficient of expansion, the effect will be better.

In addition, in the structural design, try to avoid the use of a tapered roller bearing structure at both ends of the shaft.In this structure, the longer the distance between the two bearings, the greater the possibility of getting stuck.If one end of the shaft is installed with a pair of conical bearings, as the positioning of the shaft, the axial movement of the shaft is constrained, and the other end of the shaft is used together with the rolling bearing, which only limits the radial force and can move axially in a certain range with the axial temperature.

Attention should be paid to: low temperature bearings should pay attention to burns caused by poor lubrication, so special attention should be paid to the selection of appropriate lubricant.