钣金型液力变矩器外特性计算方法  

Calculation method of external characteristic for sheet-metal hydraulic torque converter

作　　者：惠记庄[1] 张广辉[1] 聂春鹏 刘琼[1] 

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064

出　　处：《交通运输工程学报》2015年第1期74-81,共8页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金项目(11202036);陕西省自然科学基金项目(SJ08E206);中央高校基本科研业务费专项资金项目(2014G1251032)

摘　　要：对原有试验台架的信号处理和液压系统进行改进,进行了YJH315钣金型液力变矩器的牵引试验。应用三维流场数值计算方法,提出了YJH315钣金型液力变矩器外特性的动量矩方程、力矩方程与性能参数计算方法。分别通过MATLAB仿真软件和实测试验得到了不同转速比下的效率、变矩系数和公称力矩,并将仿真结果与试验结果进行对比分析。分析结果表明：当转速比在0-0.9时,试验工况下的最大效率为0.82,仿真工况下的最大效率为0.79,效率的最大误差约为2%;试验工况下的最大变矩系数为2.41,仿真工况下的最大变矩系数为2.29,变矩系数的最大误差约为3%;试验工况下的最大公称力矩为28.7N·m,仿真工况下的最大公称力矩为27.3N·m,公称力矩的最大误差约为3%。3个指标的误差均在可接受范围之内,说明提出的钣金型液力变矩器外特性计算方法可行。The signal processing and hydraulic system of original test bench was improved, and the traction test of YJH315 sheet-metal hydraulic torque converter was carried out. Based on the numerical calculation method of three dimensional flow field, the angular momentum equation, torque equation and the calculation method of performance parameter of external characteristic for YJH315 sheet-metal hydraulic torque converter were put out. The efficiencies, torque coefficients and nominal torques under different rotating speed ratios were gotten by using MATLAB simulation software and measured test respectively, and simulation result and test result were compared. Analysis result shows that when rotating speed ratio is from 0 to 0.9, the maximum efficiency is 0.82 under test condition, the value is 0.82 under simulation condition, and the maximum error of efficiency is about 2%. The maximum torque coefficient is 2.41 under test condition, the value is 2.29 under simulation condition, and the maximum error of torque coefficient is about 3%. The maximum nominal torque is 28.7 N · m under test condition, the value is 27.3 N ·m under simulation condition, and the maximum error of nominal torque is about 3%. All the errors of three indexes are within the acceptable range, so the proposedcalculation method of external characteristic for sheet-metal hydraulic torque converter is feasible. 1 tab, 22 figs, 21 refs.

关 键 词：车辆工程 液力变矩器 外特性 三维流场 变矩系数 公称力矩 平均误差 

分 类 号：U463.22[机械工程—车辆工程]