Troubleshooting Methods of Common Faults in Open Pump

Category: Water pump knowledge

2024-04-24

Troubleshooting Methods of Common Faults in Open Pump

中开泵常见故障的排除方法

1. bearing overheating.

Reason:

1. There is no oil in the bearing;

2. The pump shaft and the motor shaft are not on the same center line;

Elimination method:

1. Check and clean the bearing body and add lubricating oil;

2. Correct the coaxiality of the two axes so that they are on the same center line;

2. pump does not vibrate properly.

Reason:

1. Pump cavitation;

2. Imbalance of impeller;

3. The pump shaft is not concentric with the motor shaft;

4. The bolt of the footman is loose.

Elimination method:

1. Adjust the outlet gate valve to operate within the specified range;

2. Correct static balance of impeller;

3. Correct the coaxiality of the pump shaft and the motor shaft;

4. Tighten the anchor bolts.

The 3. pump does not produce water, and the pressure gauge shows the pressure.

Reason:

1. The resistance of the water outlet pipeline is too large;

2. Incorrect rotation direction;

3. Impeller is blocked;

4, the speed is not enough.

Elimination method:

1. Check or shorten the water outlet pipeline;

2. Correct the rotation direction of the motor;

3. Clean the impeller;

4. Increase the speed.

4. the sound inside the pump is abnormal, the pump does not take water.

Reason:

1. The resistance of the suction pipe is too large; or the suction height is too high;

2. Air is sucked in at the water absorption;

3. The temperature of the transported liquid is too high;

4, the flow is too large and cavitation phenomenon.

Elimination method:

1. Clean the water inlet pipe and bottom valve; reduce the water absorption height;

2. Check the bottom valve; reduce the water absorption height and block the air leakage;

3. Adjust the liquid temperature;

4. Adjust the outlet gate valve to operate within the specified range.

Insufficient 5. flow or too low head.

Reason:

1. Impeller or water inlet and outlet pipes are blocked;

2. The double suction sealing ring is worn too much or the impeller is damaged;

3. The rotating speed is lower than the specified value;

Elimination method:

1. Clean the impeller or pipeline;

2. Replace the damaged parts;

3. Adjust to rated speed;

6. pump consumes too much power.

Reason:

1. The packing is pressed too tightly;

2. Friction between impeller and double suction sealing ring;

3. Excessive flow;

Elimination method:

1. Loosen the packing gland;

2. Check the cause and eliminate mechanical friction;

3. Adjust the outlet gate valve to operate within the specified range;

The 7. pump does not absorb water, and the pressure gauge and vacuum gauge pointer beats violently.

Reason:

1. Insufficient water injection;

2. Pipeline or instrument leaks.

Elimination method:

1. Fill the pump with water;

2. Tighten the blocked air leakage.

8. the pump does not suck water, the vacuum gauge shows high vacuum.

Reason:

1. The bottom valve is not opened or blocked;

2. The resistance of the suction pipeline is too large;

3, the water absorption height is too high.

Elimination method:

1. Calibration or column replacement of bottom valve;

2. Clean or replace the suction pipeline;

3, reduce the water absorption height.

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