The metallurgical quality of one-way needle roller bearing materials used to be the main factor affecting the early failure of one-way needle roller bearings. With the improvement of metallurgical technology (such as vacuum degassing of unidirectional needle roller bearing steel, etc.), the quality of raw materials has been improved. The proportion of raw material quality factor in the failure analysis of one-way needle roller bearings has dropped significantly, but it is still one of the main factors affecting the failure of one-way needle roller bearings. Whether the material is selected properly is still a factor that must be considered in the failure analysis of one-way needle roller bearings.
The main task of failure analysis of one-way needle roller bearings is to find out the main factors causing the failure of one-way needle roller bearings based on a large number of background materials, analysis data and failure forms, so as to propose improvement measures in a targeted manner to extend the self-aligning roller bearing. The service period of the sub one-way needle roller bearing can avoid the sudden early failure of the one-way needle roller bearing.
The vibration of one-way needle roller bearings has a significant impact on the failure of one-way needle roller bearings. For example, spalling, indentation, corrosion, cracks, wear, etc. will be reflected in the vibration test of one-way needle roller bearings. The vibration measurement device (frequency analyzer and vibrometer, etc.) of the needle roller bearing can measure the magnitude of the vibration. The details of the abnormal vibration can be inferred from the frequency distribution. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment scale.
At present, the equipment using fine one-way needle roller bearings is becoming more and more refined, so that the grease used in one-way needle roller bearings must have the following functions:
(1) It has the same operating life as the one-way needle roller bearing, which can prolong the maintenance cycle as much as possible, shorten the downtime, and improve the labor productivity.
(2) At the high speed of dn>5×105, it is necessary to ensure that the temperature rise of the motor is low, and the oil is not thrown away, thereby reducing power consumption and protecting the motor.
(3) Its pure content is controlled under certain standards, which minimizes the pollution of equipment noise to the environment.
(4) Under the premise of ultra-low temperature operation, the flexibility of starting and running of one-way needle roller bearings is guaranteed. Common problems of one-way needle roller bearings. Guaranteed minimum output power.
The cleaning of the disassembled deep groove ball one-way needle roller bearing is divided into coarse cleaning and fine cleaning. They are placed in the container respectively, and the metal mesh pad is placed at the bottom first, so that the one-way needle roller bearing does not directly contact the dirt of the container. During rough cleaning, if the one-way needle roller bearing is rotated with dirt, it will damage the rolling surface of the deep groove ball one-way needle roller bearing, so you should pay attention. In the coarse cleaning oil, use a brush to remove the grease and sticky substances. After it is roughly clean, it is transferred to the fine cleaning.