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What causes centrifugal pump vibration?

15 Nov 2023Email

        There are many common reasons for large or abnormal centrifugal pump vibration, according to the experience of Changsha Zoomlian pump after-sales technicians, we have summarized some common reasons for large centrifugal pump vibration for you, you can check the causes of large centrifugal pump vibration from the following experience, so as to repair your centrifugal pump as soon as possible, of course, We still recommend that you are best to ask the centrifugal pump manufacturer technicians or professional pump repairmen to deal with.


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        1、Unbalance: the unbalance of the centrifugal pump rotor is one of the main reasons for vibration. This can be due to improper installation, damage or wear of rotor components, or inaccuracies during manufacturing.

        2、Bearing problems: The failure or poor condition of the bearing may cause vibration. Bearing damage, insufficient lubrication, loose bearing seats, etc., can be the cause of vibration problems.

        3、Impeller problem: Asymmetric design, damage or blockage of the impeller may cause vibration of the centrifugal pump. These problems can cause uneven water flow and cause vibration.

        4、Water flow problems: Uneven water flow in the inlet pipe or pump may also cause vibration. Foreign objects, air, or other fluid problems in the piping can cause the centrifugal pump to vibrate.

        5、Pump foundation problems: If the foundation of the centrifugal pump is improperly designed or installed, it may cause vibration. Instability or insufficient rigidity of the foundation can have a negative effect on vibration.

        6、Motor problems: If the centrifugal pump is linked to the motor, motor problems (such as unbalance, bearing failure) may also cause vibration.

        7、System resonance: System resonance means that the natural frequency of the centrifugal pump and its supporting structure (pipeline, foundation, etc.) is similar to the excitation frequency, resulting in enhanced vibration. This may be due to improper system design or operating conditions.

         8、Over-current or over-pressure: If there is over-current or over-pressure in the centrifugal pump system, it may lead to the centrifugal pump operating point deviating from the design condition, resulting in vibration.

         9、Mechanical loosening: loosening of mechanical connection parts such as bolts and nuts in the pump or its supporting structure may also cause vibration.

         To solve the problem of Centrifugal pump vibration, it is usually necessary to carry out detailed fault diagnosis, including vibration analysis, axis vibration measurement, temperature measurement, etc. In this way, the root cause of the problem can be more accurately determined and the corresponding repair or adjustment measures can be taken. Vibration problems are best investigated and resolved by professional maintenance personnel or engineers.

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