装载机液力变矩器闭锁过程动态分析

Dynamic Analysis of Locking Processes of Loader Hydraulic Torque Converters

为了减小装载机液力变矩器闭锁过程中产生的振动冲击对零部件使用寿命的影响,提高闭锁品质,根据装载机闭锁离合器工作原理对液力变矩器闭锁过程和接合参数进行了分析,并设计了闭锁充油液压控制系统及充油控制曲线,同时对装载机传动系统进行了简化,建立了闭锁过程的数学模型;基于该模型运用Simulink软件进行了建模仿真,分别分析了闭锁充油时间和充油压力对动态闭锁过程的影响,分析结果表明:闭锁充油时间在0.2s、充油压力在1.2MPa时闭锁效果最佳。验证了所设计的闭锁充油控制曲线是正确的,达到了减小闭锁过程中的动载荷并提高车辆运动平稳性的目的,为其他工程车辆闭锁过程动态分析研究提供了参考。

In order to reduce the influences of vibration shocks caused by the locking processes of a hydraulic torque converter on the service life of the parts and to improve the locking quality,according to the working principles of loader locking clutchs of the torque converters,the lock up processes and binding parameters were analyzed,the locking oil filling hydraulic control system and oil filling control curve were designed,and the loader drive systems were simplified.Simultaneously,a mathematical model of the lock up processes was established.Based on the model,the simulations were carried out by using Simulink,the effects of locking filling time and filling pressures on dynamic locking processes were analyzed respectively.Results show that the blocking effectiveness is the best when the oil filling time is as 0.2s,and the filling pressure is as 1.2MPa.The correctness of designed oil filling control curves is proved and it achieves the purpose of reducing the dynamic loads during the locking processes and improving the vehicle motion stability,providing a reference for dynamic analysis of locking processes of other engineering vehicles.