双钢轮振动压路机行走速度稳定性分析
Analysis of speed stability of traction system of double？？drum vibratory roller

为了改进双钢轮振动压路机行走速度的稳定性，进一步提高路面的压实质量，从组成行走系统各部件工作特性对行走速度稳定性的影响进行理论分析和试验研究。通过对双钢轮振动压路机行走系统分析，得到影响压路机行走系统速度稳定性的若干因素；通过频域分析得到双钢轮振动压路机行走液压驱动系统的数学模型，给出了双钢轮振动压路机行走系统速度刚度的理论公式和行走系统的传递函数模型。研究结果表明：双钢轮振动压路机行走系统速度稳定性的主要影响因素有行走系统各组成部分的减速比、行走液压系统的动态特性、轮边减速器的工作效率以及发动机的调速及匹配特性；通过对压路机行走系统进行合理匹配，提高行走液压系统及轮边减速器的工作效率，改善发动机的调速特性以及微调行走泵排量等措施，能够在一定程度上提高双钢轮振动压路机行走系统的速度稳定性；压路机行走系统由比例部分、一阶微分部分、二阶微分部分构成，其中比例部分参数取决于钢轮的轮边减速器，一阶微分部分是由行走液压系统的油液泄漏及其体积压缩引起的，二阶微分部分是一个比较复杂的二阶系统，主要受液压系统参数和行走系统结构参数等的影响。该分析为双钢轮振动压路机行走系统的参数匹配和性能优化提供了理论依据。
The main factors influencing the speed stability of the travelling system of double？？drum vibratory rollers were studied， with the aim of improving the speed stability of the system as well as the compaction quality of pavements. By analyzing the control principle of the travelling system of a double？？drum vibratory roller, the kinematics and dynamics of the components of the system were analyzed. Several factors affecting the speed stability were determined by analyzing the components of the travelling system, and a mathematical model of the hydraulic power system of the traction system was obtained via frequency domain analysis. Finally, a theoretical formula for speed stiffness and a transfer function model of the travelling system of vibratory rollers were obtained. The results of show that the main factors influencing the speed stability of the travelling system include the reduction ratio of the components of the travelling system, the working efficiency of the travelling hydraulic system and the wheel reducer, and the speed regulation and matching features of the engine. Methods such as matching the parameters of the travelling system, improving the working efficiency of the travelling system and the wheel edge reducer, improving the speed regulating characteristics of the engine, and fine？？tuning the pump displacement are considered to improve the speed stability of the travelling system of the double？？drum vibratory roller. The model of the travelling system of the vibratory roller consisted of a proportional link, first？？order differential link, and second？？order differential link. The parameters of the proportional link depend on the wheel edge reducer. The first？？order differential link is driven by oil leakage and the volume compression of the hydraulic power system. The second？？order differential link is a complex system, mainly influenced by the parameters of the hydraulic system and the structural parameters of the vibratory roller. The results provide a theoretical basis for parameter matching and performance optimization of the