TEST STAND Russian patent published in 1999 - IPC

FIELD: test stand for testing hydraulic units with flow of working fluid. SUBSTANCE: stand includes object under test, high-pressure gas source, two service receiving reservoirs, piping system, automatic control units, working fluid control and parameter measuring devices forming bottle system for pumping working medium through object under test; stand is additionally provided with unit for stabilization of direction of flow in object under test at any direction of its flow in piping system; flow direction stabilization unit includes two cavities; each cavity is provided with two inlet and two outlet check valves; sections; of pipe lines after similar check valves are brought in communication in pairs by means of cross-connections; cavities of this unit are brought in communication with piping system and cross-connections are brought in communication with inlet and outlet of object under test. EFFECT: improved stabilization of direction of flow of working medium through object under test at any direction of flow in system which is necessary for return of working medium from one reservoir to other reservoir in order to repeat pumping cycle. 3 dwg