【作者】 吴志明；

【导师】 于兰英；

【作者基本信息】 西南交通大学 ， 机械工程， 2011， 硕士

【摘要】 文章以博世力士乐公司生产的A4VSG750-HD型斜盘式柱塞变量泵变量机构为研究对象,通过分析柱塞泵的变量机构内部结构与工作原理,建立A4VSG-HD型液压轴向柱塞泵双向变量机构的数学模型；基于AMESim建立轴向柱塞泵的变量机构模型,分析控制性能与弹簧刚度、预压缩量等关键参数的关系,并在试验装置上对仿真模型的正确性进行验证。具体研究顺序如下：首先以A4VSG750-HD斜盘式轴向柱塞泵为实体建立三维模型。通过分析柱塞泵的变量机构的内部结构与工作原理,建立A4VSG-HD型液压轴向柱塞泵双向变量机构的数学模型,得出影响柱塞泵控制特性的决定性因素。在UG三维设计软件建立的斜盘式柱塞泵装配模型基础上,联合液压系统仿真软件AMESim和多体系动力分析仿真软件ADAMS,通过两者之间的接口,建立整个柱塞泵的联合仿真模型,利用模型之间的数据传递,建立了斜盘式柱塞泵的机液一体化模型。其次在AMESim中,对A4VSG750-HD型轴向柱塞泵的变量机构进行仿真,分析变量机构中各个部件对控制特性和动态特性的影响,并通过四组阀芯中心复位弹簧验证数学模型的正确性。最后在试验装置上,对A4VSG750-HD型轴向柱塞泵的变量机构进行实验验证。得到如下结论：A4VSG-HD型轴向柱塞泵的控制装置对泵的排量调节与先导控制压力有关,泵的排量与先导控制压力成比例关系；伺服阀中心复位弹簧的参数和阀芯端面面积,为变量机构控制范围主要决定因素；系统负载压力、伺服阀左右复位弹簧的刚度以及先导控制压力对变量机构的动态特性有比较明显的影响；本文仿真研究结果与实验结果基本一致,说明本文所建立的变量机构模型是正确的,所得出的结论也具有普遍性,有利于以后斜盘式变量泵变量机构的设计与优化。更多还原

【Abstract】 The research object in this paper is the variable-displacement device of A4VSG750-HD series hydraulic swashplate axial piston pump, which is produced by REXROTH. Mathematical model of variable-displacement device is developed by analyzing the internal structures and the operating principles of the servo valve and the variable-displacement cylinder. A simulation model for the variable-displacement device is established based on AMESim, and the relationship between the control performance and the key parameters as spring rate and pre-compression stroke. The correctness of the simulation model is tested by experiment through the test device. The specific work in the following order:First, a three-dimensional model of the A4VSG750-HD series swashplate axial piston pump is established. Mathematical model of variable-displacement device within A4VSG-HD series hydraulic axial piston pump is established by analyzing the internal structures and the operating principles of the servo valve and the variable-displacement cylinder, and the determining factor influencing the control characteristic is found out. The swashplate axial piston pump assembly model is established in the UG three-dimensional design software. Hydraulic system simulation software AMESim and multi-system dynamic analysis and simulation software ADAMS are combined together. The co-simulation model of axial piston pump is established through the interface between the two softwares.Second, simulations are performed for the variable-displacement device within A4VSG750-HD series hydraulic axial piston pump in AMESim, analyzing the influences of the control characteristics and dynamic characteristics from the components of the variable-displacement device. At the same time, test the Mathematical model by four group of central return-springs in valve plug.Finally, test the variable-displacement device within A4VSG750-HD series hydraulic axial piston pump by experiment through the test device, then get the following conclusions:The control hydraulic pressure is connected to output volume when the variable-displacement device of hydraulic axial piston pump operates. The output volume of the pump is proportional to the control hydraulic pressure. The parameters of central return-spring in servo valve and the area of the head face at servo value are the determining factors. They determine the control range of the variable-displacement device. The dynamic characteristic is remarkably affected by load pressure of the system, the parameters of the left and right sides return-springs of the servo value and The control hydraulic pressure. In this paper, the simulation results are basically in accordance with the experimental results. It means that the simulation model of the variable-displacement device is correct. The conclusions drawn by this paper are universal. It helps to the design and the optimization of the variable-displacement device.更多还原