装载机液压系统动态性能仿真与实验研究

发布时间：2018-08-24 09:23

【摘要】：在工程机械中,液压系统是十分重要的核心部件之一,液压系统的可靠性对于整机性能至关重要。通过对液压系统的动态性能的仿真、分析与研究,可以为整机性能的提高和优化提供理论依据,缩短开发周期,降低研发成本。本课题以某机型装载机液压系统为研究对象,利用SimulationX仿真软件对工作装置液压系统进行了仿真建模,建立了整机工作装置的多体动力学模型,得到了工作装置液压系统及其元件的动态性能、不同负荷情况下的压力-流量特性等性能指标。本文主要进行了以下几部分的工作：建立了某型号装载机整机工作装置液压系统及其元件的仿真模型,分析了工作装置液压系统及其各个元件的动态性能参数；建立了工作装置机械机构的多体动力学模型,分析了各回路的压力、流量等特性参数；通过一系列实验,测试工作装置液压系统在不同工况下的动态特性,将实验结果与仿真结果进行对比,进一步完善了仿真模型,同时也为继续在该模型基础上对装载机液压系统的优化匹配研究提供实际依据。本文对装载机各个工作装置的液压系统进行了建模,得出了理想的仿真结果；跟实验数据进行对比,为以后装载机的技术改进和系统优化提供模型参考；通过对装载机液压系统的建模仿真与实验研究,全面掌握装载机液压系统的动态性能,包括各元件的在不同作业状况下的压力-流量特性、流量脉动、压力瞬态峰值等性能参数,为整机液压系统性能的优化打下基础。
[Abstract]:In construction machinery, hydraulic system is one of the most important components, and the reliability of hydraulic system is very important to the performance of the whole machine. Through the simulation, analysis and research of the dynamic performance of the hydraulic system, it can provide the theoretical basis for the improvement and optimization of the performance of the whole machine, shorten the development period and reduce the research and development cost. In this paper, the hydraulic system of a certain loader is taken as the research object, and the simulation modeling of the hydraulic system of the working device is carried out by using the SimulationX simulation software, and the multi-body dynamics model of the working device of the whole machine is established. The dynamic performance of the hydraulic system and its components and the pressure-flow characteristics under different loads are obtained. The main work of this paper is as follows: the simulation model of the hydraulic system and its components of a certain type loader is established, and the dynamic performance parameters of the hydraulic system of the working device and its components are analyzed. The multi-body dynamic model of the mechanical mechanism of the working device is established, and the characteristic parameters of each loop, such as pressure and flow rate, are analyzed, and the dynamic characteristics of the hydraulic system of the working device under different working conditions are tested through a series of experiments. By comparing the experimental results with the simulation results, the simulation model is further improved, and the practical basis is provided for the further research on the optimization and matching of the loader hydraulic system based on the model. In this paper, the hydraulic system of each working device of the loader is modeled, and the ideal simulation results are obtained, and compared with the experimental data, the model reference is provided for the technical improvement and system optimization of the loader in the future. Through modeling, simulation and experimental study on hydraulic system of loader, the dynamic performance of hydraulic system of loader, including pressure-flow characteristic and flow pulsation of each component under different working conditions, is mastered. The pressure transient peak and other performance parameters lay the foundation for the optimization of the hydraulic system performance of the whole machine.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137;TH243

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