挖掘机液压泵—马达测试系统关键技术开发与研究

发布时间：2018-03-16 02:31

本文选题：功率回收　切入点：液压泵和马达测试系统　出处：《广东工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着近几十年经济发展、基础设施建设步伐的加快和大型工程的陆续开展,工程机械得到的普及性的应用。利用工程机械施工,可以降低施工人员的劳动强度,提高工作效率以及降低单位时间作业的成本。作为工程机械之中最重要的挖掘机,应用更为广泛。挖掘机的液压泵、马达都是整个挖掘机液压系统的重要组成部分,通常被比喻为液压系统的“心脏”和“手臂”。液压泵、马达都是精密而且复杂的液压元件,他们的性能指标和参数非常多,并且每一个参数都对整个系统的工作状态产生严重的影响。所以对挖掘机的液压泵、马达进行全面、科学的测试显得非常重要和必要。本论文首先从国家制定的液压泵、马达测试标准中所规定的测试项目、测试方法开始,分析测试系统所要具备的功能,确定液压原理上的具体实现方法,以及关键液压元件的选型,分析了液压泵、马达测试系统的测控系统的设计思路,比较了不同控制器的优缺点,确定了最佳的控制方案。液压测试系统与其他工业产品一样,节能、减排技术已经成为研究的重要方向之一。本文研究了在测试过程中,能量消耗的途径；分析比较了不同能量回收的方案之后,提出了适合本课题的能量回收方案；并且对能量回收的量化进行了推导与计算。另外,本论文利用先进行建模仿真软件AMESim对液压马达测试系统进行了建模与仿真；滤除次要因素,简化液压系统,在AMESim环境下建立了模型,重点分析了能量回收率的验证,被试泵排量与加载泵排量的匹配关系,功率回收模式下测试系统整体发热量的控制优化,换向阀块通径大、小对整个系统的影响等问题,验证了功率回收的可行性,探明了系统进一步优化的方向。最后,本论文利用建立好的液压泵、马达测试系统,对典型的神钢挖掘机SK260LC主泵,SK200LC旋转马达进行了较为完整的测试。通过测试得到的曲线报表与仿真结果进行比对,验证了仿真对测试系统设计的有效性。本文设计与开发的挖掘机液压主泵、马达测试系统满足了系统性能的要求,实际工程应用效果良好。
[Abstract]:With the economic development in recent decades, the accelerated pace of infrastructure construction and the continuous development of large-scale projects, the widespread application of construction machinery and the use of construction machinery can reduce the labor intensity of construction personnel. As the most important excavator in construction machinery, it is more widely used. The hydraulic pump and motor of excavator is an important part of the hydraulic system of the excavator. Often compared to the "heart" and "arm" of hydraulic systems, hydraulic pumps and motors are precise and complex hydraulic components that have a lot of performance and parameters. And every parameter has a serious effect on the working state of the whole system, so it is very important and necessary to test the hydraulic pump and motor of the excavator comprehensively and scientifically. This paper begins with the test items and test methods stipulated in the hydraulic pump and motor test standard, analyzes the functions of the test system, and determines the specific realization method of hydraulic principle. And the selection of key hydraulic components, the design ideas of the measurement and control system of hydraulic pump and motor test system are analyzed, the advantages and disadvantages of different controllers are compared, and the best control scheme is determined. The hydraulic testing system is the same as other industrial products. Energy saving and emission reduction technology have become one of the important research directions. This paper studies the ways of energy consumption in the process of testing, analyzes and compares the different energy recovery schemes, and puts forward the energy recovery scheme suitable for this topic. The quantization of energy recovery is deduced and calculated. In addition, in this paper, the hydraulic motor test system is modeled and simulated by the first modeling and simulation software AMESim, the secondary factors are filtered out, the hydraulic system is simplified, the model is established under the AMESim environment, and the verification of the energy recovery rate is analyzed emphatically. The matching relationship between pump displacement and loading pump displacement, the control optimization of overall heat generation in the test system under the power recovery mode, the large diameter of the reversing valve block and the influence on the whole system are verified, and the feasibility of power recovery is verified. The direction of further optimization of the system has been proved. Finally, by using the established hydraulic pump and motor test system, the typical SK200LC rotary motor of SK260LC main pump of Shengang excavator is tested in this paper. The curve reports obtained are compared with the simulation results. The validity of the simulation to the design of the test system is verified. The hydraulic main pump and motor test system of excavator designed and developed in this paper meets the requirements of system performance, and the practical application effect is good.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.51

【引证文献】