拖拉机多路阀节流槽动态特性研究与试验  

Research and experiment on dynamic characteristics of tractor multi⁃way valve throttling groove

作　　者：杨俊茹[1,2] 于小东 李瑞川 徐继康[1,2] 韩宗冉 李艳超 Yang Junru;Yu Xiaodong;Li Ruichuan;Xu Jikang;Han Zongran;Li Yanchao(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao,266590,China;Rizhao Haidro Hydraulic Co.,Ltd,Rizhao,276800,China;Qilu University of Technology,Jinan,250353,China)

机构地区：[1]山东科技大学机械电子工程学院,青岛市266590 [2]日照海卓液压有限公司,山东日照276800 [3]齐鲁工业大学,济南市250353

出　　处：《中国农机化学报》2024年第8期126-131,共6页Journal of Chinese Agricultural Mechanization

基　　金：山东省重点研发计划项目(2021CXGC010812,2021TSGC1419,2022CXGC020702)。

摘　　要：为优化部分拖拉机多路阀流量特性、减小压差等问题,设计一种具有U-半圆形节流槽结构的拖拉机多路阀,通过仿真试验研究U-半圆形节流槽拖拉机多路阀的动态特性。结果表明:U-半圆形节流槽出口流量呈现先小后大再小的特点。多路阀出口稳态流量为113 L/min,流量变化稳定无冲击,控制特性好。制定U-半圆形节流槽拖拉机多路阀试验方案,通过试验得出阀口压差随着阀芯位移的增大而减小,阀口最小压差为1.2 MPa;测得多路阀最大泄漏量为10.5 mL/min,满足泄漏指标。从而验证U-半圆形节流槽多路阀流量变化稳定,内泄漏量小。In order to solve the problems of large leakage and large vortex area of some tractor multi⁃way valves,a tractor multi⁃way valve with U⁃semi⁃circular throttle groove is designed,and the dynamic characteristics of U⁃semicircular throttle trough tractor multi⁃way valve are studied through simulation experiments.The results showed that the outlet flow of U⁃semicircular throttle valve showed the characteristics of slow first,then fast and then slow.The steady⁃state flow rate of the outlet of the multi⁃way valve was 113 L/min,the flow change was stable without shock,and the control characteristics were good.The test scheme of U⁃semicircular throttle groove tractor multi⁃way valve was formulated,and it was concluded that the pressure difference at the valve port decreased with the increase of the displacement of the valve core,and the minimum pressure difference at the valve port was 1.2 MPa.The maximum leakage of the multi⁃way valve was 10.5 mL/min,which met the leakage index.Therefore,it was verified that the flow change of the U⁃semicircular throttle channel multi⁃way valve was stable and the internal leakage was small.

关 键 词：拖拉机 多路阀 U-半圆形节流槽 动态特性 泄漏量 

分 类 号：S222[农业科学—农业机械化工程] S223[农业科学—农业工程]