Analysis of the Reasons for Failure of Four Row Cylindrical Roller Bearings in Service

The reasons for the failure of imported bearings are often multi-factors. All the influencing factors of the design and manufacturing process will be related to the failure of the four-row cylindrical roller bearing, which is difficult to judge by analysis. In general, it can be considered and analyzed from two aspects: usage factors and internal factors. The use factor mainly refers to whether the installation adjustment, use and maintenance, maintenance and repair meet the technical requirements. Installation conditions are one of the primary factors of use. Four-row cylindrical roller bearings often change the force state between the parts of the entire set of bearings due to improper installation, and the bearings run in abnormal conditions and fail early. According to the technical requirements of bearing installation, use, maintenance and maintenance, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the running bearing, find the cause immediately, and make adjustments to make it Back to normal. In addition, it is also important to analyze and test the quality of the grease and the surrounding medium and atmosphere. 1. If you hear noise from the inlet, first of all, it is important to find the location of the noise. There are many moving parts that may produce noise, and it may also be that some rotating parts are in contact with non-rotating parts. If it is confirmed that the noise is in the four-row cylindrical roller bearing, it may be damaged and needs to be replaced. 2. Because the working conditions that lead to failure on both sides are similar, even if only one is broken, it is recommended to replace it in pairs. 3. Imports are more sensitive, and in any case, correct methods and appropriate tools are required. In the process of storage, transportation and installation, the parts of the bearing cannot be damaged. A large pressure is required to press in, so special tools are required. Be sure to refer to the manual. 4. The installation should be in a clean and tidy environment. The entry of fine particles will also shorten the service life of the four-row cylindrical roller bearing. It is very important to maintain a clean environment when changing. Hammer strikes are not allowed, and be careful not to fall on the ground (or similar mishandling). The condition of the shaft and seat should also be checked before installation, even a small amount of wear can lead to poor fit and thus damage. The metallurgical quality of imported bearing materials used to be the main factor affecting the early failure of rolling bearings. With the advancement of metallurgical technology (such as vacuum degassing of bearing steel, etc.), the quality of raw materials has been improved. The proportion of raw material quality factor in bearing failure analysis has dropped significantly, but it is still one of the main factors affecting the failure of four-row cylindrical roller bearings. Whether the material is selected properly is still a factor that must be considered in bearing failure analysis. The main task of failure analysis of imported bearings is to find out the main factors causing bearing failure based on a large number of background materials, analysis data and failure forms, so as to propose improvement measures in a targeted manner and extend the service period of four-row cylindrical roller bearings. Avoid sudden early failure of the bearing.

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