What is the cause of overheating of the bearing during operation of the vacuum pump?
May 29, 2019| Since the vacuum pump is formed at a high speed, the rotor speed is too fast to form a bearing that supports the rotor. What is the reason for the overheating of the bearing during the operation of the vacuum pump? We will briefly understand the following.
1 valve crack
When a valve disc is cracked, the pressure on both sides of the impeller will be unbalanced, and the axial force will occur in the rotor, which will intensify the bearing load. The long-term operation will increase the bearing temperature. In this case, the valve plate should be replaced in time.
2-axis end seal failure
When the shaft end seal packing is damaged or the sealed water passage is blocked, air is drawn from these damaged gaps into the pump body, which will form the suction and exhaust performance of the pump. If only one side of the seal fails, the pressure imbalance on both sides of the impeller will be formed, and the axial force of the rotor will increase the bearing load, thereby increasing the bearing temperature.
3 bearing preload is too large
This situation will promote bearing clearance reduction or no play, resulting in bearing warming.
4 sensational influence
When the pump body or bearing is sensational, the bearing temperature will be too high. Look at the pump body to find the cause of the sensation, and eliminate the sensation, then the bearing temperature will recover.
5 smooth representation
The increase in smooth grease is too large or too small, or the smooth grease type does not match, and its use time is too long, or the smooth grease may be contaminated to form a bearing heat. At this moment, you should check the smooth grease type, ask the manufacturer the appropriate amount, adjust the smooth grease to recover the bearing temperature.
6 bearing damage
Bearing bearing roll and bearing cage damage will be accompanied by the appearance of bearing overheating. Bearing damage is necessary to replace the new bearing in time.