TEST STAND FOR HYDROSTATIC DRIVE UNITS Russian patent published in 2000 - IPC

FIELD: mechanical engineering; testing facilities. SUBSTANCE: stand has drive shaft 1 for connection to shafts of gear-type hydraulic pump 3 or hydrostatic drive pump 2 to be tested, hydraulic system with first hydraulic tank 12, first suction line 4 whose outlet is to be connected to suction space of tested hydraulic pump 3, first pressure-and-drain line 5 furnished with restrictor 7 for connecting line inlet to pressure space of hydraulic pump 3 and change-over device 13 for connecting tested hydraulic distributor 14 to pressure section of pressure-and-drain line 5. Stand is furnished also with fasteners for mounting units to be tested and also instruments. To carry out tests of hydrostatic drive stand is furnished with second suction line 20 whose outlet is to be connected to suction space of tested pump 2, second suction line being furnished with restrictor 23 and pressure gauge 24, second pressure-and-drain line 22 whose inlet is to be connected to high-pressure space of tested hydraulic motor 19 of hydrostatic drive, drain line 25 whose inlet is to be connected to drain space of pump 2, braking device 33 for shaft of hydraulic motor 19 and second hydraulic tank 27 to which inlet of second suction line 20 and outlets of drain line 25 and second-pressure-and-drain line 22 are connected. To carry out tests of hydraulic cylinders, stand is furnished with mounted 34 for fastening tested hydraulic cylinder 37 on stand, transmitter 38 for measuring pressure built by hydraulic cylinder, and pipelines 39, 40 for connecting hydraulic cylinder 37 to first pressure- and-drain line 5 of stand. In process of testing, end of rod of hydraulic cylinder 37 acts onto transmitter 38. EFFECT: enlarged operating capabilities. 9 cl, 1 dwg