大流量高频响数字伺服阀

发布时间：2018-01-26 00:53

本文关键词： 大流量 2D伺服阀数字控制线性仿真结构设计　出处：《浙江工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：国内数字阀产品的设计研究落后国外很多,尤其在大流量高频响性能领域的研究更是贫乏,因此本论文课题具有及其重要的理论和实际意义。作为新型电液数字控制元件2D数字伺服阀(简称2D阀)具有静、动态特性良好,响应速度快,抗干扰及抗污染能力强,且能连续控制,可以实现极小的死区和滞环。本文设计的大流量高频响数字伺服阀采用2D阀作为先导控制元件,采用伺服螺旋机构作为关键控制技术,充分发挥了2D阀的性能优点。为了获得大流量,必须加大阀开口量,因此,在结构上把2D阀设计成大行程位移控制阀,来控制主阀开口量。另外,为了避免主阀流量饱和及保证油路的设计空间,主阀芯轴颈截面设计成梅花形。该设计通过对主阀进行直接机械位置反馈,从结构设计上实现主阀芯位移的精确闭环控制。本文的主要工作和成果如下: 1.研究设计了一种新型结构的大流量高频响数字伺服阀。本文第2章详细描述了阀的工作原理,并设计出三种不同的方案进行对比,选出最优方案。 2.在阀的结构上,通过球形链接将先导2D阀与主阀设计成整体。在第3章、第4章和第5章分别叙述了数学模型的建立,并运用MATLAB软件中的Simulink数据库对2D阀进行线性仿真分析和结构参数的设计计算及优化。 3.实验证明,2D阀在加大位移行程后,用作主阀的先导控制级其静、动态特性依然良好,大位移位置控制精度高,但响应速度受到一定影响。 4.总结了仿真分析、结构设计和实验结果,并提出不足与展望。
[Abstract]:Domestic digital valve product design research lags behind a lot of foreign countries, especially in the field of high-frequency response performance of large flow research is even more poor. Therefore, this paper has important theoretical and practical significance. As a new type of electro-hydraulic digital control element 2D digital servo valve (2D valve) has a static, dynamic characteristics and fast response. Strong anti-interference and anti-pollution ability, and can be controlled continuously, can achieve minimal dead zone and hysteresis. The high frequency digital servo valve designed in this paper uses 2D valve as pilot control element and servo screw mechanism as the key control technology to give full play to the performance advantages of 2D valve in order to obtain large flow rate. Therefore, 2D valve should be designed into a large-stroke displacement control valve in structure to control the opening of the main valve. In addition, in order to avoid the flow saturation of the main valve and ensure the design space of the oil circuit. The shaft neck section of the main valve core is designed in the form of plum blossom. By direct mechanical position feedback to the main valve the precise closed loop control of the displacement of the main valve core is realized from the structure design. The main work and results of this paper are as follows: 1. A new type of high frequency digital servo valve with large flow rate is designed. In chapter 2, the working principle of the valve is described in detail, and three different schemes are designed to compare and select the optimal scheme. 2. In the structure of the valve, the pilot 2D valve and the main valve are designed as a whole by spherical linkage. In chapter 3, chapter 4 and chapter 5, the establishment of mathematical model is described respectively. The linear simulation analysis of 2D valve and the design and optimization of structural parameters are carried out by using the Simulink database in MATLAB software. 3. The experimental results show that when the displacement stroke is increased, the 2D valve is used as the pilot control stage of the main valve, its static and dynamic characteristics are still good, the precision of the position control of the large displacement is high, but the response speed is affected to a certain extent. 4. The simulation analysis, structure design and experimental results are summarized, and the shortcomings and prospects are put forward.
【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

【参考文献】