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Title:: Analysis of speed stability of traction system of doubledrum vibratory roller

Author(s):: ZHU Wuwei; LI Yu; YAO Yunshi; FENG Zhongxu; （1. National Engineering Laboratory for Highway Maintenance Equipment, Changan University, Xian 710064，Shaanxi, China; 2. Key Laboratory of Road Construction Technology and Equipment of Ministry ofEducation, Changan University, Xian 710064, Shaanxi, China）

Keywords:: mechanical engineering; vibratory roller; speed stiffness; system performance; transfer function

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Abstract:: 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 travelling system. 2 tabs, 6 figs, 26 refs.

Analysis of speed stability of traction system of doubledrum vibratory roller(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

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