How to maintain and repair the noise produced by one-way needle bearing

The metallurgical quality of unidirectional needle bearing material was once the main factor affecting the early failure of unidirectional needle bearing. With the improvement of Metallurgical Technology (such as vacuum degassing of unidirectional needle bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in the failure analysis of unidirectional needle bearing has decreased significantly, but it is still one of the main factors affecting the failure of unidirectional needle bearing. Proper material selection is still a necessary factor for failure analysis of unidirectional needle bearing.

The main task of failure analysis of unidirectional needle roller bearing is to find out the main factors that cause the failure of unidirectional needle roller bearing according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, extend the service life of the self-aligning roller unidirectional needle roller bearing, and avoid the sudden early failure of unidirectional needle roller bearing.

The vibration of one-way needle bearing has a significant effect on the failure of one-way needle bearing. For example, peeling, indentation, rust, crack, wear and so on will be reflected in the vibration detection of one-way needle bearing. Therefore, by using a special vibration measuring device (frequency analyzer and vibration meter, etc.) of one-way needle bearing, the magnitude of vibration can be measured, and the abnormal vibration can be inferred from the frequency distribution The values measured in detail are different due to the use premise of unidirectional needle roller bearing or the installation position of sensor, so it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment scale

At present, the equipment of fine unidirectional needle bearing is becoming more and more refined, so the grease used for unidirectional needle bearing must have the following functions:

(1) With no and one-way needle bearing the same operating life, try to delay maintenance cycle, shorten downtime, advance 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 without oil rejection, so as to reduce the power consumption and protect the motor.

(3) Its pure content control is under the inevitable standard to minimize the pollution of equipment noise to the situation.

(4) Under the premise of ultra-low temperature work, guarantee the intelligence of starting and running of one-way needle bearing, common problems of one-way needle bearing. Guarantee the minimum output power.

The cleaning of the removed deep groove ball one-way needle bearing is divided into rough cleaning and fine cleaning, which are respectively placed in the container, and the metal net is placed at the bottom first, so that the one-way needle bearing does not directly contact the dirt of the container. During rough cleaning, if the unidirectional needle bearing rotates with dirt, it will damage the rolling surface of the deep groove ball unidirectional needle bearing, which should be paid attention to. In the crude cleaning oil, use the brush to remove the smooth grease and adhesive. After the oil is generally clean, turn to the fine cleaning.