装载机动力传动系统参数匹配与仿真

发布时间：2018-03-27 14:10

本文选题：装载机　切入点：传动系统　出处：《东北大学》2012年硕士论文

【摘要】：装载机动力传动系统主要包括：发动机、液力变矩器、变速箱和驱动桥,是装载机最重要的组成部分之一。动力传动系统各参数的匹配是否合理,将最终决定整机的性能优劣。因此,研究装载机动力传动系统参数合理匹配非常具有实际应用价值。以ZL50型轮式装载机的液力机械传动系统为例进行分析,针对样机传动系统存在性能差,匹配效果不佳,进行改进。计算整机所需的发动机功率,并确定发动机型号以及工作装置液压系统的基本参数。针对采用的6CT8.3-C215涡轮增压发动机,提出恒功率区间的概念。在分析现行的发动机与液力变矩器的匹配基础上,提出面向涡轮增压发动机与变矩器匹配的新方法：即高效区中点匹配法。以部分功率匹配为例,与现行匹配方法进行比较,结果表明液力变矩器平均输出功率提高,发动机比油耗值下降,因此高效区中点匹配法效果更好。以液力变矩器的有效直径为设计变量,对发动机与液力变矩器进行优化匹配,并计算变速箱各挡速比。在完成上述工作的基础上,采用模块化的思想,将装载机分为：发动机、液力变矩器、变速箱和驱动桥、整机以及外界环境五个模块,并分别建立数学模型和MATLAB/Simulink仿真模型。将每个模块的MATLAB/Simulink仿真模型连接起来,建立装载机动力传动系统仿真系统,分析装载机传动系统在铲装物料工况、前进举升工况和满载后退工况下的工作性能,结果表明装载机动力性与经济性不能同时得到满足,设计时应有所侧重。上述工作为合理匹配装载机动力传动系统参数提供借鉴,建立的动力传动系统仿真系统可在设计阶段对传动系统的性能进行进行预测,有效缩短设计时间。
[Abstract]:The powertrain system of loader mainly includes engine, hydraulic torque converter, gearbox and drive axle, which is one of the most important parts of loader. Therefore, it is of great practical value to study the reasonable matching of the parameters of the loader power transmission system. Taking the hydraulic mechanical transmission system of ZL50 wheel loader as an example, the performance of the prototype transmission system is poor, the matching effect is not good, and the engine power is calculated. The basic parameters of hydraulic system of engine type and working device are determined. The concept of constant power range is put forward for the 6CT8.3-C215 turbocharged engine. Based on the analysis of the matching between the engine and the torque converter, In this paper, a new matching method for turbocharged engine and torque converter is proposed, that is, the midpoint matching method in high efficiency region. Taking partial power matching as an example, compared with the current matching method, the results show that the average output power of hydraulic torque converter is increased. Because of the decrease of engine fuel consumption value, the midpoint matching method in high efficiency region is better. Taking the effective diameter of hydraulic torque converter as design variable, the engine and hydraulic torque converter are optimized and the gear ratio of gearbox is calculated. On the basis of the above work, the loader is divided into five modules: engine, hydraulic torque converter, gearbox and drive axle, whole machine and external environment. The mathematical model and MATLAB/Simulink simulation model are established respectively. The MATLAB/Simulink simulation model of each module is connected together, and the power transmission system simulation system of loader is established, and the working condition of loader transmission system in shovel loading material is analyzed. The results show that the power performance and economy of the loader can not be satisfied at the same time, so the design should be emphasized. The above work provides a reference for reasonably matching the parameters of powertrain system of loader. The simulation system of power transmission system established can predict the performance of transmission system in the design stage and effectively shorten the design time.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH243

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