What Causes Vibration in Multistage Centrifugal Pumps?
2025-06-24 15:43:30
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Our company's multistage centrifugal pumps are widely used in chemical plants, oil refineries, agricultural irrigation, and other fields due to their high head, large flow rate, stable operation, and compact structure. However, multistage centrifugal pumps may experience pump body vibration during use, so extra caution is required during operation. The following are some common causes of pump body vibration in multi-stage centrifugal pumps, which can help you prevent such issues from occurring.
1. Unbalanced rotor. During production, installation, or operation, an unbalanced rotor can cause vibration. For example, manufacturing errors during the production of the impeller may result in the impeller's center of gravity not aligning with the rotational center; or during installation, if the impeller is not properly seated, it can also lead to rotor imbalance.
2. Bearing damage. Generally, bearings are critical components that support the rotor. If bearings suffer from wear, fatigue, corrosion, or other forms of damage, it can cause the bearing clearance to increase or decrease, thereby affecting the normal operation of the rotor and causing vibration.
3. Foreign objects in the impeller flow channels. Foreign objects such as stones, impurities, or debris in the impeller flow channels can disrupt normal flow, cause uneven force distribution on the impeller, and result in vibration in the multistage centrifugal pump. Therefore, when pumping media containing impurities, users typically install a filter at the pump inlet to prevent foreign objects from entering the pump.
4. Unstable flow rate. When the flow rate of a multistage centrifugal pump is unstable, it can cause uneven pressure distribution around the impeller, generating radial forces that lead to vibration. For example, if a control valve is installed on the pump's discharge pipe and the valve's opening is unstable, it can cause the pump's flow rate to become unstable.
5. Improper installation. Factors such as an uneven pump foundation, loose anchor bolts, or loose pipe connections can cause vibration during pump operation. Therefore, when installing a multistage centrifugal pump, it is essential to select a level site and securely tighten the anchor bolts to prevent such issues.
The above five causes can help you avoid vibration issues in multistage centrifugal pumps, thereby extending the machine's service life and reducing production costs. If you need to purchase a new pump, please contact us immediately, and we will assist you in selecting the appropriate model.
