The size of the bearing clearance

Update:21-06-2019
Summary:

The size of the bearing clearance, but the bearing afte […]

The size of the bearing clearance, but the bearing after running will not have this problem.

1. The uneven distribution of grease in the new bearing is caused by the uneven distribution of the grease inside the bearing. In the initial stage of operation, there is a phenomenon of homogenization.

2. The viscosity of oil has a certain relationship. If you choose a grease with relatively low viscosity, it will affect the life. The most important thing is that the viscosity is also related to temperature. The higher the temperature, the higher the viscosity of the oil. low. This will result in less loss. So the first half of you said yes, the second half, in fact, it should be said that the grease viscosity of the time is most suitable for bearing operation, not the bigger the better. Usually there is a certain range, called the Kappa coefficient. When this number is between 1 and 4, the good viscosity is the most suitable. If the high quality viscosity is too large, it will bring about the problem of temperature rise. Your problem is that, at the beginning, all the temperatures are low, the viscosity of the grease is large, and the loss is large. After a period of operation, the temperature rises, the grease becomes soft, and the viscosity decreases, resulting in a small loss. Therefore, when choosing lubrication, it should be based on the operating temperature selection, and at the same time the loss is also based on a temperature. To eliminate the effects of temperature.

3. The size of the bearing clearance, but the bearing after running will not have this problem. The motor's noise requirements have very strict bearing clearances that have no direct effect on friction, but it has an effect on the number of rolling elements in the load zone, which indirectly affects losses, but not primarily. It is not recommended to assess the loss by adjusting the clearance.