【作者】 李培；

【导师】 柯坚；

【作者基本信息】 西南交通大学 ， 机械电子工程， 2012， 硕士

【摘要】 工程机械是国家基础建设的主要装备,液压挖掘机作为工程建设中主要的施工机械,已广泛应用于土方施工、水利工程、国防建设和一些地质灾害的救援等。但是大量工程机械所消耗的资源、排放的污染物以对环境产生了难以估计的负荷。面对当今社会能源紧缺、环境问题日益严重的情况,节能减排已经成为工程机械发展的关键技术。鉴于混合动力技术在汽车领域的成功应用,为适应社会的长远发展,减少能源的消耗和对环境的污染,在液压挖掘机上应用混合动力技术已成为挖掘机节能发展一个重要方向。本论文主要是分析了国内外先进的混合动力驱动技术和动臂节能技术,在此基础上设计了带势能回收的动臂流量再生系统,并进行了仿真分析和元件的计算选型。本论文研究的主要内容如下：1、调研了各工程机械厂家对混合动力驱动技术的研究和运用情况,以某公司20T级挖掘机机型为参考,对普通挖掘机液压驱动系统、串联混合动力驱动系统和并联混合动力驱动系统进行了分析,并通过建模仿真对比了三种驱动系统的性能参数,结果表明并联混合动力驱动系统的能量利用率较高。2、在挖掘机前端工作装置模型中引入了电力式能量回收系统,并对挖掘机工作装置及其驱动系统的典型工作过程进行了仿真,得到挖掘机前端工作装置各液压缸的性能参数和可回收能量的比例。3、通过对常见的挖掘机动臂系统的分析,提出了一种带势能回收的动臂流量再生系统,并利用建模仿真对比分析了几种动臂系统的性能参数,结果表明带势能回收的动臂流量再生系统具有较高能量利用率。在此基础上,对所提出的带势能回收的动臂流量再生系统进行了详细的分析和元件的设计选型。更多还原

【Abstract】 Construction machinery is the main equipment of national infrastructure, as the main construction machinery, hydraulic excavator has been widely used in earthwork construction, water conservancy, national defense construction, and geological disasters’ rescue. It is difficult to estimate the load generated by construction machinery that resources consumed and emissions pollutants to the environment. Face the situation of energy shortages, environmental problems increasingly serious, Energy saving has become a key technology for the construction machinery development.In view of hybrid technology successfully used in the automotive sector and In order to meet long-term development of society, to application the hybrid technology to the hydraulic excavator has become an important direction for excavator’s energy saving the development. This paper is primarily analyze the advanced hybrid and boom’s energy-saving technology, on this basis, design a flow regeneration loop with potential energy recovery system, and carried out the simulation analysis and calculation for the component selection. Main work is as follows:1.Research the hybrid drive technology application on the construction machinery manufacturers, and to20tons as the research object,analysis the ordinary excavator hydraulic drive system, series and parallel hybrid drive system, and comparing the performance and parameters of three drive systems by modeling and simulation, results show that the parallel hybrid drive system has higher energy efficiency.2.Introduced the power-type model energy recovery system in front of the excavator’s working device, and carried out the simulation for excavator’s working device and drive system in a typical work process, get the cylinder’s performance parameters and proportion of recyclable energy of excavator’s working system.3.Through the common analysis for excavator’s boom system, design a flow regeneration loop with potential energy recovery device, and comparative analysis the performance parameters of the three boom systems by modeling and simulation, the results show that the flow regeneration loop with potential energy recovery systems has a higher efficiency, on this basis, carried out dissective analysis and component design selection for the flow regeneration loop with potential energy recovery system.更多还原