This paper analyzes in detail the common type of centrifugal pump failure, such as centrifugal pump bearing fever, centrifugal pump out of liquid, centrifugal pump flow, lack of head, centrifugal pump leaks serious, centrifugal pump vibration or noise, centrifugal pump motor overload and so on , And describes in detail the causes of the above symptoms, and how to correctly deal with the above-mentioned failure No. Symptoms Causes Treatment 1 Bearing fever 1, excessive oil 2, too little oil 3, lubricant deterioration 4, the unit is not the heart 5 , Vibration 1, reduce oil 2, refueling 3, drain and clean the oil pool plus new oil 4, check and adjust the pump and prime mover 5, check the balance of the rotor or at a smaller flow rate 2 pump No liquid 1, air is sucked in the suction pipe or pump 2, the valve on the inlet or outlet pipe is closed 3, the lift of the pump is higher than the maximum lift of the pump, the air leakage of the suction pipe of the pump 5, the wrong impeller rotation direction 6, suction Height is too high 7, the suction pipe is too small or clogged debris 8, speed does not match 1, filled with liquid, remove the air 2, open the valve 3, replace the Young High pump 4, to prevent leakage on the inlet side 5, to correct the motor steering 6, reduce the pump installation height, increase the pressure at the inlet 7, increase the suction pipe diameter, eliminating plug 8, the motor speed to meet the requirements 3 flow, less than 1 , Impeller damage 2, seal ring wear too much 3, speed less than 4, inlet or outlet valve is not fully open 5, air leakage in the suction pipe 6, the pipeline is blocked 7, the medium density and pump requirements do not match 8, the device Head and pump head does not match 1, replace the new impeller 2, replace the seal 3, increase the speed as required 4, fully open 5, the leak sealed 6, eliminate the blocking 7, recalculate or replace the appropriate power of the motor 8, Reduce the installation height of the pump 4 serious sealing leak 1, sealing material selection improper material 2, serious friction wear 3, dynamic and static ring uneven 4, the friction pair is too large, static ring break 5, O-ring damage 1, for the pump Unit description of the media, with appropriate seals 2, replacement of wear parts, and adjust the spring pressure 3, to re-adjust the seal assembly 4, the entire pump disassembly ring, so that the error with the axis perpendicular to the error of less than 0.10, as required Seal assembly 5, replace the O-ring 5 pump vibration and noise 1, the pump shaft and motor shaft centerline misalignment 2, the shaft bending 3, the bearing wear 4, pump cavitation 5, rotating parts and fixed parts wear 6, the rotation part of the loss of balance 7, the pipeline and the pump debris clogging 8, the smaller the import valve 1, alignment 2, replace the new shaft 3, replace the bearing 4, consult the factory 5, repair pump or improve Use the situation 6, check the reasons, try to eliminate 7, check the sewage 8, open the inlet valve, adjust the outlet valve 6 motor overload 1, the pump and the prime mover misalignment 2, the relative density of the media becomes larger 3, the friction part of the rotation 4, the device resistance Low, so that the operating point is biased at a large flow 1, adjust the pump and the motive of the neutral 2, change the process 3, repair friction parts 4, check the suction and discharge line pressure and the original changes, and to be adjusted

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