微小型2D数字伺服阀的改进设计研究

发布时间：2018-07-05 19:19

  本文选题：微小型 + 2D阀　； 参考：《浙江工业大学》2016年硕士论文

【摘要】：电液伺服技术的性能与主机性能息息相关,在军事领域以及工业领域都起着决定性的作用,已逐渐成为衡量国家现代工业发展的标准。电液伺服控制系统以其诸多优点如控制精度高、响应速度块、抗负载刚性大等,已在航空航、冶金、军事和工程机械等领域中广泛运用。对于电液伺服系统,电液伺服阀的性能对整个系统的控制精度、响应特性、工作可靠性及寿命起着决定性的作用。2D数字伺服阀解决了传统的喷嘴挡板阀的抗污染能力差以及射流管阀零位泄漏较大的缺点,并具有结构简单、流量大、功耗小、易于实现闭环控制且静动态性能良好等优点。由于工业领域和军事领域对伺服阀的要求完全不同,本文针对应用于军事领域的微小型2D数字伺服阀进行研究,其主要研究内容和成果如下:(1)提出微小型2D数字伺服阀的设计目标,对微小型2D数字伺服阀的各组成部分进行了结构分析以及结构紧凑化设计,包括传动机构的设计选择以及两级零位保持机构的设计等。结果表明,其最终重量达到0.24kg,对比改进前的伺服阀,减重0.16kg,对比国内外同流量类型的产品,做到了减重0.16~0.94kg。(2)为了研究伺服阀的性能,在零位泄露和输入输出特性两个方面理论分析了其静态特性,列出了流量连续性方程和主阀芯的力平衡方程,建立了数学模型,通过仿真理论分析了影响其性能的几个关键因素,将仿真结果与结构计算相结合,对阀体设计进行了优化。(3)对电-机械转换器和微小型2D数字伺服阀进行实验研究。实验表明,电-机械转换器在-3dB时频率达到180Hz,-90°时频率达到200Hz,微小型2D数字伺服阀滞环大小为3.25%,阶跃响应时间为8ms,频宽大小为120Hz。结果表明对比同流量产品,频宽提高20Hz以上。研究结果表明,对比同流量等级国内外生产的伺服阀,微小型2D数字伺服阀的重量更轻,体积更小,动静态性能更加优越。
[Abstract]:The performance of electro-hydraulic servo technology is closely related to the performance of mainframe and plays a decisive role in military and industrial fields. It has gradually become the standard to measure the development of modern industry in our country. Electro-hydraulic servo control system has been widely used in aviation, metallurgy, military and construction machinery fields for its many advantages, such as high control precision, response speed block, high load rigidity and so on. For the electro-hydraulic servo system, the performance of the electro-hydraulic servo valve has the control accuracy and response characteristics of the whole system. Working reliability and service life play a decisive role. 2D digital servo valve solves the disadvantages of poor anti-pollution ability of traditional nozzle baffle valve and large zero leakage of jet pipe valve, and has the advantages of simple structure, large flow rate and low power consumption. It is easy to realize closed loop control and has good static and dynamic performance. Because the requirements of servo valve in industry and military field are completely different, this paper studies the miniature 2D digital servo valve applied in military field. The main research contents and results are as follows: (1) the design goal of micro 2D digital servo valve is put forward, and the structural analysis and compact design of each component of miniature 2D digital servo valve are carried out. Including the design selection of transmission mechanism and the design of two-stage zero-position holding mechanism and so on. The results show that the final weight of the valve is 0.24 kg, compared with the servo valve before the improvement, the weight loss is 0.16 kg, compared with the domestic and foreign products of the same flow type, the weight loss of the servo valve is 0.160.94 kg. (2) in order to study the performance of the servo valve, The static characteristics of zero leakage and input / output characteristics are analyzed theoretically, the flow continuity equation and the force balance equation of the main valve core are listed, and the mathematical model is established. Several key factors affecting the performance of the valve are analyzed by simulation theory. The design of valve body is optimized by combining the simulation results with the structural calculation. (3) the electro-mechanical converter and the miniature 2D digital servo valve are experimentally studied. The experimental results show that the frequency of the electro-mechanical converter reaches 180Hz at -3dB, the hysteresis of the miniature 2D digital servo valve is 3.25, the step response time is 8ms, and the frequency width is 120Hz. The results show that compared with the same flow rate products, the bandwidth is increased by more than 20 Hz. The results show that, compared with the servo valves produced at home and abroad with the same flow level, the miniature 2D digital servo valves are lighter in weight, smaller in volume and superior in dynamic and static performance.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH137.52

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本文编号：2101451