基于液动力的水压阀阀口设计及试验研究  

Design and Experimental Study of Water Hydraulic Valve Port Based on Flow Force

作　　者：赵瑞豪 廉自生 廖瑶瑶 张恒 李润泽 ZHAO Ruihao;LIAN Zisheng;LIAO Yaoyao;ZHANG Heng;LI Runze(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]煤矿综采装备山西省重点实验室,山西太原030024

出　　处：《机床与液压》2022年第1期1-6,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金青年科学基金项目(51905368);国家自然科学基金联合基金重点资助项目(U1610251)。

摘　　要：水压电液比例方向阀是智能化液压支架的核心控制元件,非线性的阀口液动力是影响比例阀性能的关键因素。非全周开口的"锥滑阀"是水压比例阀常采用的结构形式,"锥滑阀"有先节流后密封与先密封后节流两种结构形式。分别建立了两种结构的三维流道模型并进行了网格划分,通过网格无关性验证选取了合适的网格密度。利用CFD仿真方法得到不同阀口开度、不同阀口压差下阀芯所受液动力变化曲线,结果表明:两种"锥滑阀"结构阀口液动力变化趋势相同,先密封后节流结构的阀口液动力要明显小于同等工况下先节流后密封结构的液动力。最后搭建了液动力验证试验系统,通过测量阀口流量和阀口压差间接验证了CFD仿真分析的正确性。The electro-hydraulic proportional directional valve with water medium is the core control component of intelligent hydraulic roof support, and the nonlinear flow force is the key factor affecting the performance of proportional valve. The taper slide valve with notches is the structure commonly used in proportional valves. The taper slide valve has two typical structural forms: throttling first then sealing and sealing first then throttling. The three-dimensional flow channel models of the two kinds of structures were established and meshed, in addition, the appropriate mesh density was selected through mesh independence verification. The flow forces on the valve spool under different opening and pressure difference were obtained by CFD simulation method. The results show that the variation trend of the flow force is same in two different schemes, and the flow force of sealing first then throttling structure is obviously less than that of throttling first then sealing structure under the same working condition. Finally, a hydrodynamic verification test system was set up, and the correctness of CFD simulation analysis was indirectly verified by measuring the valve port flow and the pressure difference.

关 键 词：锥滑阀 液动力 CFD仿真 水压阀 

分 类 号：TH137.523􀆰[机械工程—机械制造及自动化]