c80履带式全压自卸车传动与控制系统研究.pdf

Study on the Transmission and Control System of C80 Hydrostatic Track Dumpers A Dissertation Submitted for the Degree of Master Candidate ：Shi Shaojun Supervisor：Prof.Wang Xin Chang’an University, Xi’an, China 摘 要 履带式自卸车是一种采用履带底盘，利用自身发动机动力驱动液压升举机构，将 车厢倾斜一定角度卸下物料，并依靠车厢自重或液压缸收缩使车厢复位的专用车辆。 近年来，随着技术与元件的成熟和不断发展，液压传动在中小型工程机械中得到了广 泛的应用。因此在履带式自卸车市场需求量增大，对产品综合性能要求也越来越高的 情形下，研究和开发技术先进的全液压电比例控制履带式自卸车有其重要的现实意义 和实用价值。 本文对C80 履带式全液压自卸车的传动系统与电比例控制技术进行了研究。通过 对中小型履带式自卸车使用工况与功能分析，确定了基于双泵双马达的行驶系统液压 传动方案。对传动系统进行了参数匹配研究；给出了发动机、电比例泵和双排量马达 等关键元件的匹配参数与选型；对行驶速度、驱动力、驱动扭矩等关键参数进行了设 计计算；对C80 履带式全液压自卸车的控制系统功能的分析，对主控制器、显示器等 元件选型，并分析了控制系统的输入输出信号进行了引脚分配；基于AMESim 软件， 建立了履带式自卸车电液行驶系统仿真模型，进行了行驶性能仿真。理论分析和仿真 结果表明，论文方案合理可行。 关键词：履带式自卸车、全液压传动、参数匹配、电比例控制、RC6-9、AMESim I Abstract The truck dumper which is equipped with track chassis depend on hydraulic lift mechanism drived by the engine to unload with small slope of the carriage, and depend on the gravity of the carriage and shrinkage of the hydraulic cylinder to reset. With the maturity of the technologies and the development of components, the hydraulic transmission is widely applied in small engineering machinery. With the greatly increasing of the requirement in the market of the truck dumper, the research and further development of the advanced truck dumper play a critical role in satisfying such requirements. The transmission system and electrical proportional control technology of the C80 truck dumpers is studied in this paper. The plan of adopting the hydrostatic transmission based on the double dump and double motor system is determined by analyzing the working cond