TEST STAND FOR POSITIVE DISPLACEMENT HYDRAULIC MACHINES Russian patent published in 2001 - IPC

FIELD: mechanical engineering; testing facilities. SUBSTANCE: proposed stand has pump, tank and suction line to be connected by its outlet to inlet of pump to be tested or outlet of hydraulic motor under testing. Inlet of drain line is connected to drain space of tested hydraulic machine. Pressure-drain main line of pump communicates through adjustable restrictor with hydraulic motor to drive tested hydraulic machine. Stand is furnished with distributor to provide possibility of connecting inlet and outlet of tested hydraulic machine with inlet of pressure-drain main line at simultaneous separation of suction line from tested hydraulic machine. Hydraulic motor shaft is directly coupled with shaft of tested hydraulic machine, and inlet of hydraulic motor is connected with outlet of pressure-drain main line. EFFECT: reduced metal usage, energy consumption and cost of stand. 2 cl, 1 dwg