1. No flow after startup, no pressure :
Failure reason: the pump is not completely filled with liquid, suction pipe resistance is too large.
Solution: discharge pump gas. Such as the medium for low temperature gas, then extend the cooling time, such as the inlet pressure is lower than atmospheric pressure, check whether the inlet pipe leakage; improve suction pipeline, reduce resistance.
2. Pump vibration :
Fault: the flow is too small or too large, cavitation; anchor bolt or bolt loose coupling; the bad; gas medium; unbalanced rotor bearing wear or shaft bending.
Solution: adjust the export width, the flow rate reaches a specified value; bolts; re alignment; deflation and find the leak point; to find balance, or even change; hold the pump inspection, replacement of parts.
3. Lack of flow or head low :
Failure reason: rear overpressure, more than pump design lift; minimum flow valve is not closed; low speed or reverse; pump population blockage.
Solution: adjust operation, reduce rear pressure; close minimum flow valve; check motor, correct steering; clear.
4. Changing the color of lubricating oil :
Failure reason: medium or cooling water enters gear box.
Solution: check the mechanical seal and the shaft sealing ring or cooler leaks.
5. Increase in the loss of lubricating oil :
Failure reason: oil seal leakage; lubricating oil pipeline leakage.
Solution: replace the seal leak out.
6. Pump side mechanical seal leakage :
Fault: vaporization caused by the sealing surface of the seal failure; freeze to death caused by the sealing surface sealing surface wear failure.
Solution: find vaporization reason and eliminate; increase flushing device, prevent icing; replace seal.
7. Abnormal sound :
Fault reason: cavitation; parts loose; motor noise abnormal.
Solution: find cause, eliminate cavitation; tighten or replace parts; check the cleaning motor.
8. Bearing temperature is high :
Fault: lubricating oil shortage or improper cooling; or high temperature metamorphism.
Solution: check the lubricating oil brand or adjust the cooling water; oil or replace the qualified lubricant; cleaning cooler.
9. Motor overload :
Failure reason: medium density becomes larger; impeller and shell rubbing.
Solution: adjust operation; disassemble pump check, adjust clearance.
