Vacuum pump bearing maintenance

Common causes of bearing fever during vacuum pump operation

As the vacuum pump in high-speed operation will be formed, the rotor speed is too fast will form a bearing support rotor fever.

Usually formed during the operation of the vacuum pump bearings overheating have the following reasons and vacuum pump bearing maintenance :

1.Valve plate: When a valve plate rupture, the pressure on both sides of the impeller will be unbalanced, the rotor axial force will occur, the bearing load aggravated, long-term operation will make the bearing temperature rise. In this case should promptly replace the valve plate.

2.Shaft seal out of effect: When the shaft seal packing failure or seal water hole is blocked, the formation of air from these damaged gap is sucked into the pump body, will form the pump suction and exhaust performance. As long as one side of the seal failure, the formation of pressure on both sides of the impeller imbalance, the rotor axial force, the bearing load increased, so that the bearing temperature increases.

3.Bearing preload is too large: This situation will promote the reduction of bearing clearance or no play, the formation of bearing temperature.

4.Sensational impact: When the pump body or bearing sensation occurs when the bearing temperature is too high, check the pump body to find a cause of the stir, eliminating the sensation, the bearing temperature recovery.

5.Smooth appearance: excessive increase in the amount of grease is too large or too small, or the type of grease is not consistent, the use of time is too long may be smooth grease is polluting will form a bearing fever. At the moment, you should check the type of grease, ask the appropriate amount of manufacturers, adjust the smooth grease can recover bearing temperature.

6.Bearing damage: Bearing rolling body and bearing cage damage will be accompanied by the appearance of bearing overheating. Bearing damage is timely replacement of new bearings.

Edited by Catherine Qin / EVP Vacuum Solution

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