Maintenance of self-priming sewage pump method and troubleshooting of common water pump

First, the sea calm self-absorption sewage pump maintenance
(1) Check the self-priming pump and pipeline junction with or without loosening. Hand or tool to turn the pump, sewage pump test to see if flexible.
(2) Try to control the flow rate and lift of the self-priming pump within the range indicated on the label to ensure that the self-priming pump operates at the highest efficiency point to obtain the maximum energy-saving effect.
(3) During the operation of the self-priming pump , the bearing temperature must not exceed the ambient temperature 35C, and the maximum temperature must not exceed 80C.
(4) If abnormal sound is found in the self-priming pump, stop immediately to check the cause.
(5) When the sewage pump is to be stopped, close the gate valve and pressure gauge first, and then stop the motor.
(6) When the self-priming sewage pump is not used for a long time and is used during the winter season, it is necessary to unscrew the screw plug of the lower part of the pump body to release the medium. Prevent freezing cracks. (If it is sewage, please clean the pump chamber with clean water)
(7) Seriously listen to whether the running sound of the motor is abnormal. Because the noise in the engine room during operation is relatively large, you can use a screwdriver or a hearing stick to assist in listening to both ends of the motor. If you listen to it often, you will not only find the motor and its dragging. The bad vibration of dynamic equipment, even the number of internal bearing oil can be judged, so that the timely addition of bearing oil, or replace the new bearing and other appropriate measures to deal with, to avoid the lack of dry grinding motor bearings and locked, go outside the circle, broom Burned out.
Second, the failure of the Haitan pump troubleshooting
a, the pump head is not enough
1, stainless steel self-priming pump used to transport corrosive liquid erosion of the impeller? Change new impeller
2. Does the pump performance fail to meet the design requirements? In accordance with the design requirements of Bo Hao pump
3, lack of speed? Check current and restore speed
4, semi-open impeller and pump cover gap too much? Reduce the gap
b, serious pump vibration
1. Is the pump and motor shaft different? Correcting, aligning pump and motor shafts
2, pump shaft bending? Remove the alignment or renew
3, impeller imbalance? Remove the balance
c, water pump bearing overheating
1. Is lubricating oil (fat) not enough or not enough? Lubricate (fat) to required standard
2. Are the pump and motor shaft different? Correcting, aligning pump and motor shafts
3, bearing damage? Replacement of new Bo Hao pump bearings
Third, Haitan pump mechanical seal leakage serious
1, spring pressure is not enough? Re-adjust spring compression or change spring
2. Change or static ring face corrosion, wear or scratch? Repair or replace bad ring static ring
3. Loose fixing screws make the spring lose its function? Fasten the screw or readjust the spring
4, dynamic ring assembly oblique roll or corrosion deformation? Reinstall or replace the dynamic ring seal for Bo pump
5, static ring assembly skew? Reinstalling the static ring for Bo pump
6, shaft sleeve machining accuracy and finish is not enough, affecting the axial movement of the ring? Change the processing accuracy of the sleeve
7. Impurities, foreign bodies, or media crystals affect the axial movement of the moving ring or between the ends of the moving and stationary rings. Eliminates impurities, foreign matter and crystallization and thoroughly cleans the sealing element
Fourth, Haitan pump packing seal leakage serious
1, too loose packing pressure? Tighten packing glands to an appropriate level
2, packing device is not good? Adjust the filling lap to make it staggered at a certain angle not in one direction
3, fillers of different sizes or wear serious? Replace the uniform model of the Bo Hao filler
4. Poor packing quality is not good sealability? Replace asbestos filler that meets requirements
5, sleeve wear too much? Replace sleeve
Five, Haitan pump motor overheated
1, the scope of use (flow, head) exceeds the pump design requirements? Select the appropriate motor by series
2, the proportion of medium over the pump configuration motor? Configure suitable Bo pump motor
3, packing gland pressure too tight or mechanical seal spring adjustment too tight? Readjust the spring compression of the gland or mechanical seal
4, poor pump assembly quality, there is friction or motor and pump shaft misalignment? Check assembly quality and eliminate assembly failure

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