How to avoid premature failure of crossed roller bearings?

In actual work, due to poor lubrication or excessive overload work, excessive friction and high heat will soften the cross-roller bearing steel, and at the same time cause the volume of the cross-roller bearing to expand and the mutual extrusion pressure to increase. When it reaches a certain level, Crossed roller bearings will lock up on the shaft.

When the cross-roller bearing is overheated, the gap between the rolling volume and the retaining bracket becomes smaller, and the generated stress concentrates on the cage. With the extension of time, the cage will also break, thus accelerating the failure rate of the cross-roller bearing. So how to avoid premature failure of crossed roller bearings?

An effective way to prevent premature failure of crossed roller bearings is to try to avoid the various factors analyzed above and the conditions that contribute to these factors: First of all, when selecting crossed roller bearings before use, consider the size of noise, rigidity, The size of the radial crack of the crossed roller bearing, the size of the rotational moment, etc. The choice of lubricating oil, according to the working environment of the crossed roller bearing, different lubricating media produce different noises in use. For example, grease lubrication is much louder than oil lubrication, and good lubrication is the primary condition for extending the service life of crossed roller bearings. Proper use of lubrication can improve the stability and accuracy of motion, and can also play a role in shock absorption and buffering to reduce wear.

In actual work, the pollution of crossed roller bearings and lubrication seasons is inevitable. It is commonly used that the relative movement of the protective cover cannot completely prevent the intrusion of dust and dirt. However, the relative movement of the inner and outer rings cannot completely prevent the contamination of the crossed roller bearing. Once the crossed roller bearing is polluted, the lubricant becomes a noise source, and the crossed roller bearing overheats due to poor lubrication, which will lead to locking. Therefore, the lubricant is not clean. When the crossed roller bearing rotates, the lubricant contacts the raceway surface, which will corrode the surface over time.

Proper assembly is also very important for premature failure of crossed roller bearings to extend service life. The same type of crossed roller bearings are used in machinery and equipment, and there are obvious differences between domestic and imported ones. This is mainly because the material and its machining accuracy are also responsible for unreasonable assembly. Whether the assembly method is correct or not is directly related to whether the proper clearance can be guaranteed. If the clearance is too small, the additional moment of the crossed roller bearing will increase. The angular displacement between the center line of the crossed roller bearing and the centerline of the crossed roller bearing hole increases, which will inevitably deteriorate the working state of the crossed roller bearing, which should be avoided as much as possible.

Fatigue also occurs early when a crossed roller bearing is overloaded. If the cause of the damage is overload, then try to choose a crossed roller bearing with a large carrying capacity during installation and design, and maintain and update it in time according to the design requirements.

The above is about the solution to avoid premature failure of crossed roller bearings. In fact, it is necessary to extend the service life of rolling crossed roller bearings. Not only depends on the high quality produced by the crossed roller bearing, but also depends on the correct assembly, reasonable use and careful maintenance.

Therefore, try to avoid damage to the crossed roller bearing caused by man or the outside world. More importantly, let the assembler and user master the various factors of the failure of the crossed roller bearing, master the methods to avoid premature failure, and strictly operate and Use the program to create a good working environment for the crossed roller bearing, and actively research and explore new ways to better play the role of the rolling crossed roller bearing.