Common Faults and Solutions of Water Pump Maintenance

Category: Water pump knowledge

2024-05-07

What should you do when you encounter some burning water pump failure problems? On the one hand, choose a big brand water pump, suchHunan Sanchang Pump IndustryTo a certain extent, it can reduce the incidence of failures. On the other hand, 80% of the minor failures in the use process can be solved by themselves. As long as you master some quick troubleshooting methods, you can avoid many unpleasant minor obstacles, save worry and effort.

水泵维修常见故障及解决方法

In practice, when dealing with faults, according to specific problems and actual analysis, we should follow the principle of "outside before inside" and do not operate blindly. First of all, check the power supply situation of the power supply, whether the connector is firmly connected, whether the switch contact is meticulous, whether the fuse is blown, whether the three-phase power supply is short of phase, etc. If there is an open circuit, poor contact, fuse blowing, or phase loss, find out the reason and repair it in time. Secondly, check whether it is the mechanical failure of the pump itself.

1, can not absorb water

Cause:The aeration pump and water supply pipe are filled with gas, the bottom valve is not completely closed, the water is not completely diverted, the vacuum pump is poorly sealed, and the shutters or flap doors are not completely closed.

Solution:Pressure water first. Then add water to the pump body and start the machine. At the same time, check whether the check valve is closed and the pipeline or pipe fittings are free of air leakage. If there is air leakage after removal Apply lubricant or paint mixture on the fittings and tighten the screws. Check the oil seal ring on the water pump shaft. If it is severely worn, replace it with a new one. There is water or air leakage in the pipeline. Nuts may not be tightened during installation. If the leak is not serious, the cement slurry can be mixed with cement oil or asphalt oil instead of leaking or leaking. Temporary repairs can be made with a little wet mud or mild soap. If there is leakage at the joint, you can use a wrench to tighten the nut. If the leak is serious, the damaged pipe must be removed and replaced.

2. Insufficient flow

Cause:Slow feed due to mismatch or belt slip. Axial flow pump impeller installation angle is too small, the head is insufficient, the pipeline is too long, or the pipeline is at a right angle-bend angle, the suction height is too high, the bottom valve, pipeline and impeller are partially blocked or the impeller is damaged. Water supply pipe leaks seriously.

Solution:Restore normal speed, remove belt grease, and adjust belt tension, adjust impeller angle to reduce pump position, reduce pipe size, or change pipe curvature. Remove obstructions and replace impeller. Replace the leakage reduction ring to stop the leakage.

3, cannot start.

First, check the power status. If the coupling connection is rigid, when the switch contacts are sealed, if the fuse is blown, the three-phase power supply is not the same. Possible open circuit, poor contact, blown fuse. Encounter this kind of situation, must find out the reason and timely repair. Then check whether it is a mechanical failure of the pump itself.

Cause:The seal is too tight or the impeller and pump body are blocked by debris, the pump shaft, bearings and reduction ring rust, the water pump shaft is severely bent, etc.

Solution:Loosen the packing and clean the water flow tank. Disassemble the pump body to remove dirt and rust. Remove or replace the pump shaft and fix it.

4. Heating of water pump

Cause:The bearing is damaged, the distance between the sub-bearing or bracket is too small, the pump shaft is bent or the two shafts are not aligned, the tape is too tight, the oil is insufficient or the oil quality is low. The balance in the impeller is blocked, the impeller is unbalanced, and the impeller has a large thrust to one side.

Solution:Replace the bearing. Remove the rear cover and place a spacer between the bracket and the bearing housing. Check the pump shaft or adjust the center of the two shafts. Correctly adjust the tightness of the tape and remove the stop in the rocker arm hole.

5. Excessive power consumption

Cause:The speed of the water pump is too high, the main shaft of the water pump is bent or the main shaft of the water pump and the main shaft of the motor are not concentric or parallel, the head of the water pump is not suitable, the water pump sucks in sediment or has blockage, the ball bearing of the motor is damaged, etc.

Solution:Check the circuit voltage, reduce the speed of the water pump, correct the main shaft of the water pump or adjust the relative position of the water pump and the motor, select the water pump with appropriate lift, clean up the sediment or blockage, and replace the ball bearing of the motor.

6. The water pump does not produce water

Cause:The pump body and suction pipe are not filled with water; the dynamic water level is lower than the water filter pipe of the pump; the suction pipe is broken, etc.

Solution:Eliminate the fault of the bottom valve and fill the diversion water; Lower the installation position of the water pump so that the filter pipe is below the dynamic water level, or wait for the dynamic water level to rise and pump the filter pipe again; Repair or replace the suction pipe.

7. The pump body vibrates violently or produces noise

Cause:The water pump is not firmly installed or the water pump is installed too high; the ball bearing of the motor is damaged; the main shaft of the water pump is bent or not concentric or parallel to the main shaft of the motor.

Solution:Install the stable water pump or reduce the installation height of the water pump; replace the ball bearing of the motor; correct the bent water pump spindle or adjust the relative position of the water pump and the motor.

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