摆线转阀式转向器对全液压转向系统特性影响

发布时间：2018-04-26 06:23

本文选题：摆线转阀式转向器 + 全液压转向系统　；参考：《机床与液压》2017年04期

【摘要】：摆线转阀式转向器是全液压转向系统的核心,其静、动态特性对转向系统的性能具有重要影响。根据摆线转阀式转向器的结构特点和全液压转向系统的工作原理,基于AMESim搭建包含转向器的全液压转向系统模型。分析转向器的静、动态特性及对系统性能的影响及方向盘不同输入状态下通过转向器对系统性能的影响。分析黏性阻尼系数、油液有效体积弹性模量、转动惯量等相关参数对转向器性能的影响。搭建全液压系统试验模型,分析转向系统执行机构转向缸位移变化。由分析结果可知:黏性阻尼系数与转向器响应呈正相关,当前者的取值增大时,后者响应曲线的峰值也逐渐增大;随着油液有效体积弹性模量的增大,响应曲线波动逐渐减弱,转向器性能得到了改善;转动惯量逐渐增大,系统调整时间延长,波动峰值增加,说明响应特性变差;转向动力缸位移相对方向盘转角有一定的延迟,而且不是准确的线性关系;转向器参数对转向系统影响的规律与仿真结果基本一致,从而验证了仿真模型的准确性。
[Abstract]:Cycloidal rotary valve steering gear is the core of full hydraulic steering system. Its static and dynamic characteristics have an important effect on the performance of steering system. According to the structural characteristics of cycloidal rotary valve steering gear and the working principle of full hydraulic steering system, a full hydraulic steering system model including steering gear is built based on AMESim. The static and dynamic characteristics of the steering gear and its influence on the system performance are analyzed, and the influence of the steering wheel on the system performance through the steering gear in different input states is analyzed. The effects of viscosity damping coefficient, effective volume elastic modulus of oil and moment of inertia on the performance of steering gear are analyzed. A full hydraulic system test model was built to analyze the displacement change of steering cylinder of steering system actuator. The results show that the viscosity damping coefficient is positively correlated with the response of the steering gear, and the peak value of the latter curve increases with the increase of the current value, and the fluctuation of the response curve decreases with the increase of the effective bulk elastic modulus of the oil. The performance of the steering gear has been improved; the moment of inertia has gradually increased, the system adjustment time has been prolonged, the peak value of the fluctuation has increased, which indicates that the response characteristics become worse; the displacement of the steering power cylinder has a certain delay relative to the steering wheel angle. Moreover, it is not an accurate linear relation, and the influence of steering gear parameters on steering system is basically consistent with the simulation results, which verifies the accuracy of the simulation model.
【作者单位】：乌鲁木齐职业大学应用工程学院;
【基金】：新疆维吾尔自治区自然科学基金资助项目(2013211A005)
【分类号】：TH137.9

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