先导式水压溢流阀的设计

结合水介质的特性及典型先导式油压溢流阀的结构,分析了先导式水压溢流阀存在的关键技术难题,在此基础上设计了一种新型的先导式水压溢流阀.针对关键技术难题,在结构上主要采取了如下措施:在溢流阀入口设置固定节流孔和二级节流主阀口以减小气蚀;阀心上加组合密封件以减少泄漏和拉丝侵蚀;先导阀心尾端设置阻尼腔以抑制振动、噪声,提高先导阀的工作稳定性等.

Design of a Two Stage Relief Valve for Water Hydraulic System

Combined with the physical and chemical characteristics of raw water and the typical structure of two stage relief valve,the key technical problems existing in this type of valve when using raw water instead of mineral oil were analysed.A novel two stage relief valve operated with raw water was designed.To solve its key technical problems,new structures are adapted in this relief valve,such as setting a fixed throttle at the inlet and using a double restriction in the main valve to reduce cavitation erosion,adding a seal at the piston of the main valve to prevent leakage and wire drawing,setting a damping chamber at the pilot stage to restrain vibration,noise,and to enhance its stability etc.