应用流量闭环控制的新型先导比例方向阀特性研究

发布时间：2018-05-26 10:42

本文选题：先导比例方向阀 + SimulationX　；参考：《太原理工大学》2011年硕士论文

【摘要】：电液比例阀采用电-机械转换装置,将输入的电信号变为位移信号,实现对传统工业用液压阀的控制,进而对液压系统的压力、流量或方向等参数进行控制。与电液伺服阀相比,电液比例阀本身能耗小、制造成本低、耐油液污染能力强；与传统开关型液压控制阀相比,电液比例阀控制特性好、响应速度快、可对输出压力和流量进行连续控制。本文对电液比例阀进行了细致的分析,并结合位移-先导流量反馈控制原理,设计了应用该控制原理的新型先导比例方向阀,通过Pro/E软件和SimulationX软件对所设计阀进行建模和仿真,仿真结果证实了应用原理的可行性和确定了比例方向阀的结构参数。主要内容如下： 1.将电液比例阀当作为一个微型液压系统进行研究,深入分析其各组成部分之间的关系以及各组成部分对整体的影响,建立了比例控制单元、电-机械转换器、先导液压半桥和容腔的数学模型。 2.研究了位移-先导流量反馈原理,并以博世力士乐多路阀为基础,提出了适用该原理的新型比例方向阀的基本结构,对阀芯、节流槽、阀套、弹簧等一些组件的结构进行了设计与计算。 3.利用Pro/E软件建立所设计阀的三维模型,确定其结构方面满足设计要求；利用SimulationX软件建立所设计阀的液压模型,确定其工作原理满足设计要求。 4.通过仿真试验对比例方向阀进行各种特性测试,仿真结果显示该阀控制精度高、动态响应快,具有比较高的推广价值。
[Abstract]:Compared with the electro - hydraulic servo valve , the electro - hydraulic proportional valve has the advantages of low energy consumption , low manufacturing cost and strong oil - resistant liquid pollution .
Compared with the traditional switch type hydraulic control valve , the electro - hydraulic proportional valve has good control characteristics and high response speed , and can continuously control the output pressure and the flow rate .

This paper analyzes the electro - hydraulic proportional valve and combines the principle of displacement - pilot flow feedback control , designs a new pilot proportional directional valve applying the control principle . The design valve is modeled and simulated by Pro / E software and Simulation X software . The simulation results confirm the feasibility of the application principle and the structural parameters of proportional directional valve . The main contents are as follows :

1 . When the electro - hydraulic proportional valve is used as a miniature hydraulic system , the relationship among its components and its influence on the whole are analyzed in detail . The mathematical model of proportional control unit , electro - mechanical converter , pilot hydraulic half - bridge and cavity is established .

2 . The principle of displacement - pilot flow feedback is studied and the basic structure of a new proportional directional valve suitable for the principle is presented . The structure of some components such as valve core , throttling groove , valve sleeve and spring is designed and calculated .

3 . The three - dimensional model of the designed valve is established by Pro / E software , and the structure of the valve is determined to meet the design requirements ;
The hydraulic model of the designed valve is established by means of simulation X software , and the working principle of the valve is determined to meet the design requirements .

4 . The proportional directional valve is tested by simulation test . The simulation results show that the valve control precision is high , the dynamic response is fast , and it has higher popularization value .
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.52

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