The different types of pump vibration

 

In an industrial setting, pump vibration analysis is a usual task. Over the years, pumps have been normal to lose their original power and start experiencing some maintenance issues like vibrations. Traditionally, it means that your pump needs to be checked by technicians to determine the root cause of these vibrations. That said, as per experts, there are five major types of pump vibration problems that could take a pump out for service for unplanned and expensive repairs.

 

Pump cavitation: It is caused due to insufficient net positive suction. Pump cavitation occurs when the absolute pressure of the liquid in the inlet reaches the liquid vapor pressure. It forms pockets in the pump as they pass through the inlet. Pump cavitation can be recognized by the sound of the pump resembling rocks rumbling through the pump.

 

Bent pump shaft: When a pump shaft bends, it can cause high axial vibration with axial phase differences on the same rotor. Pump shaft bends are more likely to happen at or near the coupling. You can identify it using dial indicators.

 

Pump flow pulsation: Such conditions occur when the pump is operating at its shut-off head, resulting in fluctuating pressure gauges. If the pump employs a swing check valve like the Vibration Triconex, the counterweight and value arm will indicate an unstable flow.

 

Pump impeller imbalance: Sometimes,the pump can seem misaligned or overheat, causing an imbalance in the pump assembly or the connected component. It results in vibration and heat buildup.

 

Pump bearing issues: Bearing failure is one of the biggest reasons for pump vibration. Pump bearings can fall due to an overload, excessive wear or tear, or related corrosion.