摘要
配流机构的节流压力损失和泄漏是影响液压马达动态性能的重要因素。针对液控单向阀配流液压马达的配流过程中阀芯的运动特性及其流场特性开展研究。基于液控单向阀配流液压装置,分析其配流阀阀芯运动特性,利用AMESim搭建液控单向阀模型,探究不同负载压力下、不同阀芯结构下,液控单向阀其阀芯运动特性;利用Fluent软件,研究阀芯开启过程中的节流压降以及流场流速情况。结果表明:在液阻孔以及阀芯小端直径一定时,阀芯小端直径与阀芯大端直径比值越接近1,其阀芯响应时间缩短,在高负载压力下,其阀芯响应也更快。在阀口输入流量为40 L/min时,其阀口前后压差为1.3 MPa,用于为高压低速大扭矩马达配流是可行的。
The throttling pressure loss and leakage of the valve distribution mechanism are important factors affecting the dynamic performance of the hydraulic motor.In this paper,the motion characteristics and flow field characteristics of the valve core in the flow distribution process of the hydraulic motor distributed by the hydraulic control check valve are studied.Based on the flow distribution hydraulic device of the hydraulic control check valve,the movement characteristics of the valve spool of the valve are analyzed.The hydraulic control check valve model is built by AMESim,and the response characteristics of the hydraulic control check valve are compared with that of the valve plate flow distribution.The throttling pressure drop and flow velocity in the process of valve opening are studied by using Fluent software.The results show when the hydraulic resistance hole and the small end diameter of the valve spool are fixed,the closer the ratio of the small end diameter of the valve spool to the diameter of the large end of the valve spool is 1,the response time of the valve spool is shortened.At high load pressures,the spool also responds faster.At the valve port input flow rate of 40 L/min,the pressure difference between the front and rear of the valve mouth is 1.3 MPa.The hydraulic control check valve distribution scheme is feasible for high pressure,low speed,and high torque hydraulic motor.
作者
罗涛
郭桐
林添良
陈其怀
任好玲
刘建平
LUO Tao;GUO Tong;LIN Tian-liang;CHEN Qi-huai;REN Hao-ling;LIU Jian-ping(College of Mechanical Engineering and Automation,Huaqiao University,Xiamen,Fujian 361021;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejinag University,Hangzhou,Zhejiang 310027;Fujian Key Laboratory of Green Intelligent Drive and Transmission for Mobile Machinery,Xiamen,Fujian 361021)
出处
《液压与气动》
北大核心
2023年第12期99-106,共8页
Chinese Hydraulics & Pneumatics
基金
华侨大学引进人才基金(605-50Y19011)
福建省自然科学基金面上项目(2021J01295)
流体动力与机电系统国家重点实验室开放基金(GZKF-202026)
福厦泉自创区协同专项(3502ZCQXT202002)。
关键词
液压马达
液控单向阀配流
CFD
配流特性
流场分析
hydraulic motor
hydraulic control check valve distribution
CFD
distribution characteristic
flowfield analysis
