HYDRAULIC MACHINE FOR MECHANICAL TESTS AT CYCLYC LOADING Russian patent published in 2008 - IPC G01N3/08 

FIELD: test engineering.

SUBSTANCE: hydraulic machine for mechanical tests at cyclic loading includes load frame, force sensor, pinchers for fixture of tested items or samples of materials, hydraulic power cylinder, pump system for working fluid supply into hydro system of machine, two hydro pulsators of cyclic supply of working fluid into power hydro cylinder, crankshafts of which are in alignment connected to each other by means of special coupling, while cylinders of two pulsators are united with common hydraulic collector, connected to power hydro cylinder of machine. The special coupling is made if form of a tooth differential mechanism; at that half couplings are rigidly connected with crankshafts and are equipped with sprockets, conjugated with tooth satellites of a differential gear, designed to rotate against half couplings axes at 90° and be fixed at any position..

EFFECT: improvement of test accuracy.

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