How do you calculate the Volumetric efficiency of a hydraulic motor?

Dear friend,

Drive the motor through a pump. Supply oil to achieve a given rpm and pressure.

Some oil will come out of case drain port and some from the out put port of the motor.

Measure the out put flow of the motor and input flow to the motor.

out put by input will be the volumetric efficiency ( the loss is case drain )

( alternatively, case drain and output flow fof the motor can be measured, then output flow divided by the sum of output flow and case drain flow is the efficiency )

Rajeev T G

tgr-bw@bw.ltindia.com