The vibration of self-priming centrifugal oil pump may be caused by the following reasons:
One: rotor imbalance.
Two: the pump shaft and motor are misaligned, and the rubber ring of the wheel is aging.
Three: bearing or sealing ring wear too much, the formation of eccentric rotor.
Four: pump pumping or gas in the pump.
Five: the suction pressure is too low, so that the liquid vaporization or nearly vaporization.
The six - axis thrust increases, causing the series axis.
Seven: improper lubrication of bearings and packing, excessive wear.
Eight: bearing wear or damage.
Nine: impeller partial blockage or external attached pipeline vibration.
Too much or too little oil (grease).
Self-priming oil pump foundation stiffness is not enough, bolts loose
Vibration standard of centrifugal oil pump is:
The speed is less than 1500Vpm, and the vibration is less than 0.09mm.
Speed 1500~ 3000Vpm, vibration less than 0.06mm.
Bearing temperature of self-priming centrifugal oil pump
Bearing temperature standard: sliding bearing less than 65℃, rolling bearing less than 70℃.
