HYDROPULSATION TEST MACHINE FOR CYCLIC FATIGUE TESTS OF SAMPLES OF MATERIALS OR PRODUCTS Russian patent published in 2012 - IPC G01N3/36 

FIELD: machine building.

SUBSTANCE: hydropulsation test machine includes power frame, force sensor, grabbing devices for attachment of tested samples or products, power hydraulic cylinder, pump unit for supply of working fluid to hydraulic system of machine, two electric motors, two hydropulsators with flywheels, the cylinders of which are combined by means of common hydraulic header to working cavity of power hydraulic cylinder of machine. Stator windings of two electric motors rotating the crankshafts and moving the stocks of hydraulic cylinders of hydropulsators are connected to outlets of two frequency converters the control digital inputs of which are connected to outputs of controller which by means of its two analogue outputs is connected to setting devices of amplitude and frequency of cyclic load, and by means of two digital inputs to outputs of angular position sensors of crankshafts of hydropulsators. Output of force sensor of test machine is connected to input of amplitude detector the output of which is connected to the third analogue input of controller.

EFFECT: improving accuracy of the specified cyclic load amplitude maintained by test machine.

1 dwg