2D电液比例换向（节流）阀原理研究

发布时间：2018-04-02 04:40

本文选题：2D换向(节流)阀　切入点：稳定性分析　出处：《浙江工业大学》2012年硕士论文

【摘要】：电液比例阀是电液比例控制技术的核心控制元件,它介于闭环伺服阀与常规开关阀之间,已成为现今液压系统的常用组件,有着极大的工程应用前景。电液比例换向(节流)阀是其中的一种,可以控制液流的流向和大小。本论文研究了一种利用阀芯双运动自由度实现的导控型电液比例换向(节流)阀,本论文称之为：2D电液比例换向(节流)阀。 2D电液比例换向(节流)阀由2D换向(节流)阀、压-扭联轴器和比例电磁铁三部分组成。本论文的创新点在于利用压-扭联轴器将比例电磁铁的直线位移转化成2D换向(节流)阀阀芯的旋转运动,进而推动阀芯滑动,实现电液比例换向(节流)阀的功能。它具有导控结构简单、控制精度高、单级流量大等优点。本论文主要对2D电液比例换向(节流)阀进行原理性研究,各章分述如下：第一章介绍了论文研究背景和电液比例阀的特点,简述了比例电磁铁和各类电液比例阀的国内外研究现状,概括了论文的选题意义和主要研究内容。第二章介绍了2D伺服阀,藉此提出了2D电液比例换向(节流)阀并分析了结构和原理,提出了多种导控方案,设计了三通2D电液比例换向(节流)阀。第三章针对2D换向(节流)阀导控级建立数学模型,随后进行稳定性分析,建立稳定条件,然后进行动态仿真,分析了几个主要参数对导控级的动态特性的影响。第四章设计压-扭联轴器及其簧片的结构,并分析其原理,然后对压-扭联轴器模型进行数学建模,解析簧片变形并且与ANASYS仿真的数值结果进行比较,验证了数学建模的可靠性。第五章阐述了簧片式压-扭联轴器及其簧片的材料选择和加工,介绍了实验台的搭建与实验数据的计算方法,然后通过实验测试其压扭转换效果,验证了簧片式压-扭联轴器可行性,并且压扭效果达到2D比例阀设计要求。第六章对论文进行全面总结,指出尚未解决的问题,提出以后的研究重点。
[Abstract]:The electro-hydraulic proportional valve is the core control element of the electro-hydraulic proportional control technology. It lies between the closed loop servo valve and the conventional switch valve, and has become a common component of the hydraulic system nowadays. It has great prospect of engineering application. Electrohydraulic proportional reversing (throttle) valve is one of them. The flow direction and size of the fluid flow can be controlled. In this paper, a pilot controlled electro-hydraulic proportional commutation (throttle) valve based on the double moving degrees of freedom of the valve core is studied, which is called the: 2D electro-hydraulic proportional commutative valve (throttle). 2D electro-hydraulic proportional reversing (throttle) valve from 2D reversing (throttle) valve, The innovation of this paper is that the linear displacement of proportional electromagnet is transformed into the rotary motion of 2D valve core, and then the sliding of valve core is promoted, which is composed of three parts: pressure-torsion coupling and proportional electromagnet, the main innovation of this paper is that the linear displacement of proportional electromagnet is transformed into the rotary motion of the valve core of 2D commutation valve by using pressure-torsion coupling. The function of electro-hydraulic proportional commutation (throttle) valve is realized, which has the advantages of simple guide control structure, high control precision and large single stage flow rate. This paper mainly studies the principle of 2D electro-hydraulic proportional commutation (throttle) valve, each chapter is described as follows:. The first chapter introduces the research background and the characteristics of electro-hydraulic proportional valve, describes the research status of proportional electromagnet and all kinds of electro-hydraulic proportional valve at home and abroad, summarizes the significance and main research content of the thesis. In the second chapter, 2D servo valve is introduced, and 2D electro-hydraulic proportional commutation (throttle) valve is put forward. The structure and principle of 2D electro-hydraulic proportional commutation (throttle) valve are analyzed, various guiding control schemes are put forward, and 2D electro-hydraulic proportional commutation (throttle) valve is designed. In the third chapter, the mathematical model is established for 2D reversing (throttle) valve guide control stage, then stability analysis is carried out, stability conditions are established, and then dynamic simulation is carried out to analyze the influence of several main parameters on the dynamic characteristics of guide control stage. In chapter 4, the structure and principle of pressure-torsional coupling and its Reed are designed and analyzed. Then the model of pressure-torsion coupling is modeled, and the deformation of spring is analyzed and compared with the numerical results of ANASYS simulation. The reliability of mathematical modeling is verified. In the fifth chapter, the material selection and processing of the spring press-torsion coupling and its Reed are described. The construction of the experimental bench and the calculation method of the experimental data are introduced. Then the effect of the pressure-torsion exchange is tested through the experiment. The feasibility of spring press-torsion coupling is verified, and the effect of compression and torsion meets the design requirement of 2D proportional valve. The sixth chapter summarizes the thesis, points out the unsolved problems, and puts forward the future research focus.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52

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