Unusual Phenomenon And Possible Causes On Hydraulic Pumps
When the hydraulic fluid flow increases the speed, it will create a low pressure zone. The gas in the fluid will form some air bubble.
And when these air bubbles pass through high pressure zone, these air bubbles will be partially compressed into extremely high pressured matter and impact on the surface material and cause some unusual vibration and noise.
This will in turn erode the surface of pump wall, and it is called cavitation. The extend of cavitation depends upon the amount of gas dissolved in the fluid, the flow rate change and the viscosity of fluid.
When cavitation occurs, it will drop the efficiency of the pump and decrease the output of the pump.
To prevent cavitation from happening, one could increase the intake diameter to stop the pump from sucking in air and clean up filter to reduce any resistance and increase the suction capacity of the pump.
Reason1: Tube Diameter Too Small Or Clogged Up
Reason2: Hydraulic Fluid Containing Air Or Moisture
Reason3: Fluid Filter Clogged With Foreign Object Or Too Fine
Reason4: Viscosity Too High And Caused The Pump To Suck In Air; Viscosity Too Low And Caused Overheating Of Pump
Reason5: Improper Location Of Fluid Intake Or Lack Of Fluid