直接位置反馈数字插装阀设计及性能分析研究

发布时间：2018-11-14 12:41

【摘要】：液压阀是液压系统中的关键单元。随着液压系统与电子技术以及网络技术的紧密结合,液压阀的数字化将成为一种必然的趋势。同时,液压系统也在向着集成。插装化方向发展。本文提出将2D阀用做先导大位移输出,通过油路全桥闭环位置反馈控制插装阀阀芯位移的设计方案,其创新点在于：(1)提出液压全桥控制方式,以达到放大开环传递系数的目的,使先导阀在6mm的范围内稳定输出;(2)在主阀芯内部开槽通过直接位置闭环控制,使主阀芯和先导阀芯位置随动,提高了主阀芯位移的精度及响应速度。本文对直接位移反馈数字插装阀进行了数学建模,并进行模块化分析,用解微分方程算法编写Matlab程序进行仿真,在仿真过程中优化各个参数,以达到最优化设计。理论分析和实验结果表明该设计能够达到设计要求。论文的各章节内容如下：第一章,对液压技术的发展做了阐述。对目前国内外的插装节流技术进行了对比；提出了本论文直接反馈数字插装阀的实现方案；明确了课题的内容。第二章,研究了闭环控制数字插装阀的结构及实现原理。优化了数字插装阀的先导级。第三、四章,对位置闭环数字插装阀进行了数学建模和模块化分析,并基于MATLAB进行数值仿真,优化了结构参数。第五章,对整个数字插装阀的参数进行设计和校核,对关键零件的加工材料和工艺进行了说明。第六章,搭建实验平台,对直接位置反馈数字插装阀进行静动态性能实验研究,实验结果验证了数字插装阀达到了预期的设计要求。第七章,总结与展望。
[Abstract]:Hydraulic valve is a key unit in hydraulic system. With the combination of hydraulic system, electronic technology and network technology, the digitization of hydraulic valve will become an inevitable trend. At the same time, the hydraulic system is also in the direction of integration. The direction of instrumentation is developing. In this paper, 2D valve is used as the leading large displacement output, and the valve core displacement is controlled by the closed loop position feedback of the whole oil bridge. The innovations of the scheme are as follows: (1) the hydraulic bridge control method is proposed. In order to enlarge the open loop transfer coefficient, the pilot valve can output stably in the range of 6mm. (2) through the direct position closed loop control in the main valve core, the position of the main valve core and the leading valve core are followed, and the precision and response speed of the main valve core displacement are improved. In this paper, the mathematical model of direct displacement feedback digital cartridge valve is established, and the modularization analysis is carried out. The Matlab program is compiled by solving differential equation algorithm, and the parameters are optimized in the process of simulation so as to achieve the optimum design. Theoretical analysis and experimental results show that the design can meet the design requirements. The contents of each chapter are as follows: the first chapter describes the development of hydraulic technology. This paper compares the current domestic and international plugging and throttling technology, puts forward the realization scheme of the direct feedback digital cartridge valve in this paper, and clarifies the contents of the subject. In the second chapter, the structure and realization principle of closed-loop control digital cartridge valve are studied. The pilot stage of digital cartridge valve is optimized. In the third and fourth chapters, the mathematical modeling and modular analysis of position closed loop digital cartridge valve are carried out, and the structural parameters are optimized by numerical simulation based on MATLAB. In the fifth chapter, the parameters of the whole digital cartridge valve are designed and checked, and the processing materials and processes of the key parts are explained. In the sixth chapter, the experimental platform is built to study the static and dynamic performance of the direct position feedback digital cartridge valve. The experimental results verify that the digital cartridge valve meets the expected design requirements. Chapter seven, summary and prospect.
【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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