MECHANICAL COMPENSATION OF POWER LOSS IN THE ENDURANCE TESTS ON ROTARY AND LINEAR POSITIVE DISPLACEMENT MACHINES.

Through experimental tests and numerical simulations the authors of this paper demonstrate a method of reducing energy consumption on the endurance stands of rotary and linear positive displacement machines. The method is based on mechanical compensation of power losses, achieved by coupling the drive shafts of two positive displacement machines, a pump and a rotary motor, with pump capacity greater than motor capacity and equal rotary speeds. The method can be applied in the simultaneous endurance tests on the two rotary positive displacement machines, and by extension, on the endurance test stands designed for hydraulic cylinders. [ABSTRACT FROM AUTHOR]