轴向液压柱塞泵变量控制方式及转速感应控制方法研究

发布时间：2019-05-18 01:26

【摘要】：国内工程机械等行业在整机系统上已逐渐接近国际水平,但重要配套基础件的研制却相对落后。轴向液压柱塞泵是大部分工程机械的核心能源元件,其变量特性直接影响了整机的工作性能和能源消耗。变量控制是轴向液压柱塞泵的核心技术之一,已成为制约液压泵和工程机械等主机品质的重要问题。在本文中,针对轴向液压柱塞泵的变量控制方式及转速感应控制方法研究主要做了以下工作： 1)综述国内外关于轴向液压柱塞泵变量控制的研究,了解了轴向液压柱塞泵变量控制的现状与发展趋势,明确了要深入研究的工作内容。 2)分析和比较了多种轴向柱塞泵变量控制方式,归纳出轴向液压柱塞泵变量机理；并针对某典型轴向液压柱塞泵,阐述和分析了变量的结构和原理；完成轴向液压柱塞泵工作时柱塞受力的分析之后,推导出柱塞力对斜盘作用而产生的平均变量阻力,并通过变量静力学分析指出平均变量阻力引起的回摆特性。 3)针对转速感应控制在匹配发动机上的应用问题,分析了液压泵与柴油机匹配理论,确定了轴向液压柱塞泵的一般控制目标和应用回摆特性的控制目标；以某型柴油机为例,研究了轴向液压柱塞泵的转速感应控制原理和匹配问题,提出了双段转速感应控制、全程转速感应的复合变量控制,改善了扭矩匹配效果。 4)在前述理论基础上,进行了轴向液压柱塞泵转速感应控制、双段转速感应控制、全程转速感应的复合变量控制的动态分析,并建立了其状态空间模型；使用S函数模块在MATLAB-Simulink软件中对其完成了非线性模型的仿真,并分析了仿真结果。 5)利用现有的泵马达实验台,组建了轴向液压柱塞泵变量控制实验系统,完成了平均变量阻力影响、复合变量控制特性实验,验证了本文的理论分析和仿真结果。
[Abstract]:The domestic construction machinery and other industries have gradually approached the international level in the whole machine system, but the development of important supporting basic parts is relatively backward. Axial hydraulic plunger pump is the core energy component of most construction machinery, and its variable characteristics directly affect the working performance and energy consumption of the whole machine. Variable control is one of the core technologies of axial hydraulic plunger pump, which has become an important problem restricting the quality of hydraulic pump and construction machinery. In this paper, the research on variable control mode and speed induction control method of axial hydraulic plunger pump is mainly done as follows: 1) the research on variable control of axial hydraulic plunger pump at home and abroad is reviewed. The present situation and development trend of variable control of axial hydraulic plunger pump are understood, and the work contents to be deeply studied are clarified. 2) the variable control methods of various axial plunger pumps are analyzed and compared, and the variable mechanism of axial hydraulic plunger pumps is summarized, and the structure and principle of variables are expounded and analyzed for a typical axial hydraulic plunger pump. After the analysis of the plunger force when the axial hydraulic plunger pump is working, the average variable resistance caused by the plunger force on the inclined disk is derived, and the pendulum characteristics caused by the average variable resistance are pointed out through the variable statics analysis. 3) aiming at the application of speed induction control in matching engine, the matching theory between hydraulic pump and diesel engine is analyzed, and the general control goal of axial hydraulic plunger pump and the control target of pendulum characteristics are determined. Taking a diesel engine as an example, the speed induction control principle and matching problem of axial hydraulic plunger pump are studied, and the compound variable control of two-stage speed induction control and the whole process speed induction is put forward, which improves the torque matching effect. 4) on the basis of the above theory, the dynamic analysis of the speed induction control, the two-stage speed induction control and the whole speed induction compound variable control of the axial hydraulic plunger pump is carried out, and its state space model is established. The S function module is used to simulate the nonlinear model in MATLAB-Simulink software, and the simulation results are analyzed. 5) using the existing pump motor experimental platform, the variable control experimental system of axial hydraulic plunger pump is set up, and the average variable resistance effect and compound variable control characteristic experiment are completed, and the theoretical analysis and simulation results of this paper are verified.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH322

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