軸向液壓柱塞泵變量控制方式及轉(zhuǎn)速感應(yīng)控制方法研究
[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.
【學(xué)位授予單位】:中南大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2011
【分類號(hào)】:TH322
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