自行式平地机功耗降低技术研究

发布时间：2018-07-20 22:12

【摘要】：非道路用工程机械的高耗能低效率与当今世界的主题之一绿色环保相违背,本论文以筑路工程机械主力军之一的自行式平地机为研究对象,首先介绍了国内外平地机的发展现状,简单介绍了平地机的组成部分,各系统的功能,应用工况以及阐述了国内外平地机降低功率损耗的方法和研究现状。使用仿真分析软件找出了主要功率损失的来源,并对各来源进行了相应的分析,提出了优化方案,提高了整机的功率使用效率,减少了发动机功率的损耗,同时降低了燃油消耗率,使得平地机的功率得到了最大化的利用。首先,简单介绍了平地机的主要结构以及主要应用工况,分析了国内外平地机降低功率损耗的方法以及研究现状。其次,对自行式平地机功率传递的路径进行了分析,通过Dynasty仿真软件找出对平地机功率损耗影响最大的传动系统与液压系统进行了进一步的分析。接着,一是通过自行式平地机传统的液力变矩器传动优缺点的分析,介绍了带闭锁离合器的变速箱工作原理,并分析了带有该功能的液力机械传动系统功耗降低的原理以及相对于变矩器传动来说效率的提高；二是通过对平地机液压系统定量系统和变量系统的分析,建立数学模型,并计算了典型工况液压系统功率损耗对比。最后,为了验证系统的有效性和仿真模型的准确性,对装有闭锁离合器变速箱和变量液压系统的平地机进行了试验验证,通过试验结果和仿真分析结果的对比,得出这两种降低功率损耗的方案可行性,功率损耗在不同的应用工况下均有着明显的降低。
[Abstract]:The high energy consumption and low efficiency of non-road construction machinery is contrary to the green environmental protection, one of the themes of the world today. In this paper, the self-propelled leveling machine, which is one of the main force of road construction machinery, is taken as the research object. Firstly, this paper introduces the development of leveling machines at home and abroad, briefly introduces the components of the grader, the functions of each system, the application conditions, and expounds the methods and research status of reducing the power loss of the leveling machines at home and abroad. The source of main power loss is found out by using the simulation analysis software, and the corresponding analysis of each source is carried out, and the optimized scheme is put forward, which improves the power efficiency of the whole machine and reduces the power loss of the engine. At the same time, the fuel consumption rate is reduced and the power of the grader is maximized. Firstly, the main structure and main application conditions of the grader are introduced, and the methods to reduce the power loss and the research status at home and abroad are analyzed. Secondly, the path of power transfer of self-propelled grader is analyzed, and the transmission system and hydraulic system which have the greatest influence on the power loss of the grader are found out by Dynasty simulation software. Then, through the analysis of the advantages and disadvantages of the traditional hydraulic torque converter drive of the self-propelled grader, the working principle of the gearbox with locking clutch is introduced. The principle of reducing power consumption of hydraulic mechanical transmission system with this function and the improvement of efficiency compared with torque converter transmission are analyzed. Second, the mathematical model is established by analyzing the quantitative system and variable system of hydraulic system of leveling machine. The power loss of hydraulic system under typical working conditions is compared. Finally, in order to verify the validity of the system and the accuracy of the simulation model, the flatbed with latch clutch gearbox and variable hydraulic system is tested and verified. The feasibility of these two schemes to reduce the power loss is obtained, and the power loss is obviously reduced under different application conditions.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U415.516

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