Horizontal multi-stage centrifugal pump in operation will encounter a series of problems, such as the total flow is not enough, the pump head is not enough, the centrifugal pump can not pump water, parts damage, motor damage and other common faults. How to solve this problem? The following ways can be referred to in detail.
To solve this problem, we must first understand the operation method of horizontal multi-stage centrifugal pump and how to carry out maintenance.
1. Check the rotation of the motor. From the motor end to the pump, the pump rotates in the opposite direction. Keep in mind that the test time should be short to prevent the machine seal from being damaged.
2. Open the automatic exhaust valve to allow liquid injection, and then close the automatic exhaust valve after the liquid fills the centrifugal pump.
3. Check the horizontal multi-stage centrifugal pump position is not abnormal.
4. Moisten the inner hole of machine seal with liquid.
5. The high temperature horizontal multistage centrifugal pump should be heated first, and the heating rate is 50 ℃ per hour.
The second is the following
1. Open the inlet gate valve and close the outlet gate valve.
2. Start the machine and check whether the centrifugal pump is operating properly.
3. Adjust the opening of the inlet and outlet valves according to the required working conditions to ensure that the motor operates within the rated voltage, otherwise the pump will be overloaded and the motor will be burned.
4. Check the leakage condition of the water pump seal, and the leakage should be less than 3 drops / min at all normal times.
5. Check the motor, the temperature of rolling bearing should be lower than 70 ℃.
1. High temperature multi-stage centrifugal pump should be desuperheated first, the desuperheating rate should be lower than 10 ℃ / min, and the temperature should be reduced to below 80 ℃.
2. Close the outlet and inlet gate valve.
3. Terminate the motor.
4. Close the suction gate valve.
5. If the centrifugal pump is not used for a long time, the liquid in the centrifugal pump should be drained clean.
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