The main shaft bearing in the engine is a particularly important component. Once the main shaft bearing fails, it will directly cause the engine to stop running. In order to improve the reliability of the engine, we must take certain measures to improve the efficiency of the bearing. Based on the understanding of all aspects of bearing knowledge, China Bearing Network will share with you, we can consider from seven aspects, which can improve the reliability of the main shaft bearing of the engine.

Seven measures can improve the reliability of the engine main shaft bearing:

1. Improve processing accuracy. To improve the machining accuracy of each component of the bearing, it should not be lower than the level 4 accuracy, and the reasonable clearance and the matching value during assembly should be selected correctly. When assembling, check the bearing according to the content specified in the special technical conditions, such as visual inspection, check whether there are surface defects and rust that exceed the regulations, and recheck the size and original clearance of the fit.

2. The amount of deflection between the bearing ring and the axis should not be large. For long-life bearings to have high reliability, the deflection of the bearing ring and the axis under working conditions should not exceed the allowable standard (for bearings with a life greater than 1000h, the deflection should not exceed 0.5').

3. Ball bearings with 3-point contact. Replacing a 4-point contact ball bearing with a 3-point radial thrust ball bearing can improve the reliability of the bearing.

4. Steel cage. The steel cage is used to replace the bronze cage (mostly used in Russian engines), and the surface of the cage is plated with silver.

5. The temperature difference between the inner and outer rings is less than 5℃. If the heat of the bearing can be effectively taken away and kept on the width of the bearing and there is a more uniform temperature field between the outer rings, the temperature difference between the inner and outer rings is not more than 5 ℃, which can improve the reliability of the bearing.