What could cause excessive vibration in a motor-pump system?

Excessive vibration in a motor-pump system is often caused by shaft misalignment. When the shafts of the motor and pump are not properly aligned, it creates uneven forces and can lead to imbalances during operation. This misalignment results in vibration as the motor tries to turn the pump, causing additional wear and potential damage to both the pump and the motor over time. Proper alignment is critical for maintaining the efficiency and longevity of the equipment, and can help reduce vibrations, leading to smoother operation.

In contrast, low fluid levels can cause problems such as cavitation, which may result in noise or performance issues, but it typically does not directly cause the type of excessive vibration associated with alignment issues. High liquid temperature might lead to thermal expansion or changes in the fluid's properties but is not a direct contributor to vibration in the same manner as shaft misalignment. Excessive lubrication might actually mitigate vibration by providing better cushioning between moving parts rather than contributing to it. Therefore, focusing on proper alignment is key to preventing excessive vibration in motor-pump systems.