Common Problems and Maintenance Methods of Low-temperature Bearings in Use

Low temperature bearings are not like high temperature bearings that can work at high temperatures. Instead, they use a unique material and structure to reduce the friction coefficient and the heat generated by friction, so that the bearings remain in a low temperature state during long-term operation. Bearings that work below -60 degrees Celsius are low temperature bearings. They are suitable for various liquid gas pumps, such as liquid nitrogen pumps, liquid nitrogen pumps, butane pumps, rocket missile liquid pumps, space shuttles, etc. So what are the common problems in the use of low temperature bearings? Today, the editor has summarized them, let's take a look!

Common problems of low temperature bearings in use

1. Under low temperature conditions, the bearings get stuck. The external reason is the change in temperature, and the internal reason is the different thermal expansion coefficients of the shaft, frame and material. In a large temperature range, the shrinkage rates of different materials will be different, resulting in small gaps and jamming. For widely used equipment, including equipment in low temperature environments, its expansion rate must be calculated, and materials with similar expansion coefficients must be used as much as possible.

2. In structural design, it is necessary to avoid using a tapered bearing at each end of the shaft. In this structure, the longer the distance between the two bearings, the greater the possibility of jamming. If a pair of tapered bearings are installed at one end of the shaft, the axial movement of the shaft is constrained as the shaft is positioned, and the other end of the shaft is used with a rolling bearing to restrain the radial force. The axial movement can be within a certain range with the axial temperature.

3. When using low temperature bearings, pay attention to burns caused by improper lubrication, so choose an appropriate lubricant.

Maintenance methods for low-temperature bearings

1. Choose the right paint

When using low-temperature bearings, be sure to use solvent-free paint and paint that does not contain oxidants, so that it will be safer when used. If other paints are used, the specific use environment and temperature must be considered. Only in the right place can it play a good effect.

2. Do a good job of daily maintenance

When using ultra-low temperature bearings, you should try your best to do daily maintenance work, because when anyone uses it, only when you can do these daily maintenance work well, can it play a more important role. Therefore, under any circumstances, we must do daily maintenance work more in place and really consider the situation.

3. Pay attention to the service life

Ultra-low temperature bearings have a certain service life. If this service life is reached, try to replace it. Don't replace it at all for a longer use time. This method is actually very wrong. When the service life is reached, it is easy to have problems of one kind or another, but if we completely ignore these problems and do not further deal with them, it will affect subsequent applications. Therefore, everyone needs to have an understanding of these.