1. No water is discharged after the pump is started: there is air in the pump or gas in the water inlet pipe, or the bottom valve is not closed tightly, and the water is not fully filled, or the vacuum pump packing is seriously leaking, and the gate valve or flap door is not tightly closed.
Solution: remove debris, replace the damaged rubber pad, change the direction of the valve; press tightly or replace the new packing, close the gate valve or tap the door; increase the amount of filling until there is no bubbling at the vent screw plug; Replace the cracked pipe; lower the head and press the nozzle of the pump into the water 0.5 meters.
2. The pump does not rotate when starting: the packing is too tight or the impeller and the pump body are jammed and blocked by debris, or the pump shaft, bearing, or leakage reduction ring is rusted, or the pump shaft is severely bent.
Solution: loosen the packing, dredge the water diversion tank; disassemble the pump body to remove debris and rust; remove the pump shaft for correction or replace with a new pump shaft.
3. The heating bearing of the water pump is damaged: the gap between the rolling bearing or the bracket cover is too small; the pump shaft is bent or the two shafts are not concentric; the tape is too tight; the oil is lacking or the oil quality is not good; the balance hole on the impeller is blocked, the impeller loses balance and increases Thrust to the side.
Solution: Replace the bearing; remove the back cover, add a gasket between the bracket and the bearing seat; adjust the pump shaft or adjust the concentricity of the two shafts; adjust the tightness of the tape appropriately; add clean butter, and the butter will occupy the bearing 60% of the inner gap; clear the blockage in the balance hole.
4. Insufficient flow after starting: the speed is not matched or the belt is slipping, so the speed is low; the blade installation angle of the axial flow pump is too small; the lift is insufficient; the suction lift is too high; the bottom valve, pipeline and impeller are partially blocked or the impeller is defective; The water pipe is leaking badly.
Solution: Adjust the blade angle, reduce the installation height of the pump; restore the rated speed, remove the belt grease, adjust the belt tightness; seal the leak of the water pump, and press the packing; remove the blockage, replace the impeller; replace the leakage ring, blockage Leaks.
Post time: 2021-12-02
