Failure Analysis and Solutions of Multistage Centrifugal Pumps

Multi-stage centrifugal pumps are two or more pump units assembled together by centrifugal pumps. Their use has changed the traditional way of centrifugal pumps, making them more efficient and safer at work better. However, in practical work, like other equipment, there will be work pressure, which may cause malfunction. Next, we will analyze the multi-stage centrifugal pump failure and troubleshooting. Multi-stage centrifugal pump failure analysis and solutions 1, insufficient flow Failure Analysis: The impact of multi-stage pump flow is less than suction pipe leaks, the bottom valve leaks; inlet blockage; lack of foot valve into the water depth; pump speed is too low; solution Method: Check the suction pipe and the bottom valve, block the leakage source; clean the silt or plug at the inlet; bottom valve into the water depth must be greater than 1.5 times the diameter of the inlet pipe; 2, power consumption is too large Fault analysis: pump speed too High; pump spindle bending or pump spindle and motor spindle is not the same or not parallel; selection of the pump head is not appropriate; solution: check the circuit voltage, reduce the pump speed; correction of the pump spindle or adjust the relative position of the pump and the motor; Pumps; 3, multi-stage pump vibration or vibration noise analysis: multi-stage pump installation is not strong or the pump is installed too high; motor ball bearings damaged; pump spindle bending or different with the motor spindle, not parallel and so on. Solution: install a steady pump or reduce the installation of the pump; replace the motor ball bearings; correct bending of the pump shaft or adjust the relative position of the pump and the motor. Most multistage centrifugal pumps used today are efficient and energy-saving water conservancy models. Such multistage centrifugal pumps have the advantages of high efficiency, energy saving, wide range of performance and stable operation. Although the use of multi-stage centrifugal pump has been affirmed by many users, but in the face of multistage centrifugal pump failure, workers need to be calm, based on previous experience and their own work experience to find a timely solution to the problem.

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