二位二通活塞换向阀外文文献翻译、中英文翻译.doc

CHINESE JOURNAL OF MECHANICAL ENGINEERING Vo1.22，No.1，2009 DOI：10．3901／CJME．2009．01．109，available online at ； Water Hydraulic 2／2 Directional Valve with Plane Piston Structure GONG Yongjun，YANG Huayong ，and WANG Zuwen 1 Laboratory of Fluid Power Transmission and Control Dalian Maritime University,DaLian 116026,China 2 The State Key Lab of Fluid Power Transmission and Control Zhejiang University,Hangzhou 310027,China Received July 13，2008；revised November 19，2008；accepted December 3，2008；published electronically February 20，2009 Abstract： Due to the fire resistance and environmental compatibility，using water as the working fluid in hydraulic circuits is receiving an increasing attention by both manufactures and users．This hydraulic directional valve is developed．When new water hydraulic directional valve is designed and manufactured，this paper introduces a water hydraulic 2／2 directional valve and its principle．The valve is composed of a hydraulically operated seat valve and a magnetic 3／2 direction valve．Aimed at the serious leakage and impact generating easily in reversing suddenly, an improved structure of water space seal is changed to direct seal，compaction force between main valve spool and main valve pocket was logically designed and damper in pilot valve port is matched with sensitive cavity in main valve．From the view of flow control，the methods of cavitations resistance of the directional water hydraulic valve are investigated．The computational fluid dynamics approaches are applied to obtain static pressure distributions and cavitations images in the channel of the main stage of the valve with two kinds of structure． The results show that the method of optimized spout can effectively restrain cavitations．The work provides some useful reference for developing water hydraulic control valve with the lower noise and lower vibration．Meantime，the structural parameters are optimized on the basis of information obtained from simulation．Static test，dynamic test