裝載機變速器功率匹配優(yōu)化設(shè)計及試驗研究
[Abstract]:As the core transmission component of the loader, the dynamic performance of the hydraulic transmission is directly related to the performance, dynamic characteristics and working efficiency of the loader. Among them, the torque converter of the hydraulic transmission and the power matching and optimization of the engine are important links. The starting performance, shift performance and fuel economy of the loader can be optimized by power matching. In this paper, the power matching and optimization of the self-developed SD50 loader transmission are carried out, and a test platform for testing the transmission performance is designed. This paper introduces the structural characteristics and working principle of SD50 hydraulic transmission, and analyzes the relationship between the characteristic parameters and dynamic characteristics of hydraulic torque converter and engine. The basic principle of power matching between torque converter and engine is determined, that is, fuel economy is taken into account on the premise of ensuring the optimization of dynamic performance. The matching method and calculation steps are worked out. Finally, Cummins 6CT8.3-C215 engine, YJ355L single phase torque converter and YJSW315-6 double turbine single phase torque converter are selected according to the parameters of SD50 transmission. According to the original characteristic data and matching method of engine and hydraulic torque converter, the output characteristic curve of engine, the input characteristic curve and common working curve of torque converter are fitted by Matlab tool, and the two kinds of torque converter are matched. The matching output characteristics are compared and analyzed, and it is concluded that the YJSW315-6 double turbine single stage dual phase torque converter is more in line with the working conditions of the loader. On the basis of matching work, the hydraulic torque converter is optimized with the goal of dynamic performance. After optimizing the hydraulic torque converter with Matlab toolbox, the optimized dynamic performance is evaluated, which proves that the optimization work improves the dynamic performance of the transmission. It can give full play to the power of the engine. The test platform for SD50 transmission performance test is designed, the open test-bed scheme is selected, the main structure is designed, and the main measuring instruments are selected. According to the relevant national standards and industry specifications, the specific test scheme and test method are worked out.
【學位授予單位】:山東大學
【學位級別】:碩士
【學位授予年份】:2012
【分類號】:TH243
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