Table of Contents
How does cavitation affect centrifugal pump?
Cavitation in a centrifugal pump has a significant effect on pump performance. Cavitation degrades the performance of a pump, resulting in a fluctuating flow rate and discharge pressure. Cavitation can also cause excessive pump vibration, which could damage pump bearings, wearing rings, and seals.
What do you mean cavitation?
Cavitation is the formation of vapor phase cavities, or bubbles, within a liquid, usually due to rapid changes in localized pressure. Various mechanical parts such as pumps, control valves and propellers can cause cavitation to occur.
How do you stop pump cavitation?
How to prevent cavitation due to vaporization
- Lower the temperature.
- Raise the liquid level in the suction vessel.
- Change the pump.
- Reduce motor RPM if possible.
- Increase the diameter of the eye of the impeller.
- Use an impeller inducer.
- Use two lower capacity pumps in parallel.
Why does cavitation occur in centrifugal pumps?
Cavitation occurs when these nuclei become unstable and aid to sudden localized flow instability. Since centrifugal pumps operation is based on use of hydrofoils, this phenomenon of unstable nuclei happens in this case only.
How can we prevent cavitation in a pump?
Open a restricted discharge valve on the pump
What is cavitation and what causes it?
Cavitation is caused by formation of vapor bubles in the liquid and there sudden collapse. Any liquid does not vaporize necessarily by heating only. Liquids vaporize when the pressure falls below the vapor pressure of the liquid at given temperature.
What causes hydraulic pump cavitation?
Cavitation occurs when the volume of hydraulic fluid demanded by any part of a hydraulic circuit exceeds the volume of fluid being supplied. This causes the absolute pressure in that part of the circuit to fall below the vapor pressure of the hydraulic fluid.