Parameter Determination Procedure for the Ejector Pump and Hydropneumatic Accumulator in the Enclosed Hydraulic Drive
V. N. Anferov, S. A. Bazanov
Siberian State University of Railway Engineering, Novosibirsk, Russia
Keywords: enclosed hydraulic drive, drainage leek return, ejector pump, ejection factor, pressure fluid pureness, closed hydraulic tank
Abstract
The impact of pressure fluid-air interaction on endurance of hydraulic drives is discussed. It is proposed to employ the enclosed hydraulic drive to isolate the pressure fluid from air, solid impurities and moisture. The functional flow chart of the enclosed hydraulic drive with hydraulic motors and hydraulic cylinders is designed. The design procedure is validated for an ejector pump and a hydropneumatic accumulator to ensure the boost pressure at the main pump inlet and to provide the drainage leek return to the system subjected to the excessive pressure. The new ejector design enables adjustment of the ejection factor and the total flow pressure at the pump outlet. The cavitation procedure is presented for the ejector tests at different values of the running, drainage and total flow rates.
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