1. Disc dehiscence
When the valve is broken, the pressure on both sides of the impeller will be unbalance. The rotor produces axial force, which increases the load of the bearing and increases the temperature of the bearing for a long time. The valve should be replaced in time.
2. Shaft end seal failure
When the shaft end seal damage or sealing water channel is blocked, the air will be sucked from the gap of the damaged pump, which will affect the pump suction and exhaust performance. If one side seal fails, the pressure on both sides of the impeller is unbalance, and the rotor produces axial force to increase the bearing load, thus increasing the temperature of the bearing.
Three. The bearing pretightening force is too high.
This will cause the bearing clearance to be cut off or no clearance, causing the bearing to heat.
4. The effect of vibration
When the pump body or bearing vibration is large, the bearing surface temperature is too high. Check the pump body to find out the cause of vibration and eliminate vibration, so that the bearing temperature will return to normal.
5. A smooth appearance
Grease is too much or too small, or the type of slippery fat is not consistent, its use time is too long or grease pollution can cause bearing fever. At this time, the type of grease should be checked, the appropriate dosage of the manufacturer is asked, and the smooth fat dose can be adjusted to restore the normal bearing temperature.
6. Bearing damage
Bearing failure will be accompanied by the characteristics of the bearing overheating. Bearing damage is a necessary condition for the replacement of new bearings in time.