压电驱动低压水液压节流阀性能研究

发布时间：2019-06-27 19:06

【摘要】：水液压传动技术是直接用海水或淡水作为工作介质的一门新技术,与传统油压技术相比,具有无污染、抗燃、节约能源、来源广泛等优点,适应了人类可持续发展和环境保护的要求,而低压水液压技术作为解决水液压元件成本问题的有效途径,正成为发达国家研究人员的研究重点,是流体传动与控制领域的前沿性课题。节流阀作为流体传动与控制系统的重要元件,是一种流量控制阀,在系统中可作为调节系统流量、给泵加载以及调节泵入口的吸入阻力。它通过调整可变节流口的大小来改变液阻,从而实现对流量的控制。本文在现有的水液压节流阀基础上,设计了一种新颖的压电驱动低压水液压节流阀,利用压电叠堆驱动器响应快、输出力大、位置精度高、节能以及易于控制等优势,来进行节流阀的开口控制。论文的主要展开的工作如下： 1、介绍了压电驱动的基本理论,并针对压电叠堆驱动器存在的关键问题,对其特性展开研究,设计压电叠堆驱动器特性测试实验系统并对其特性进行测试分析。 2、针对压电叠堆驱动器存在的温度特性和迟滞特性展开研究,提出相应的改善措施,设计了压电叠堆驱动器温度补偿机构和预紧力调节装置。并利用AMESm软件对压电叠堆驱动器在预紧力作用下进行仿真分析和实验研究,确定了预紧力施加的理想范围。 3、针对研制压电驱动低压水液压节流阀时,所要面临的腐蚀、密封及气蚀等一系列关键技术问题,在阀结构形式的选择、材料的特性分析与选择、密封形式的选择以及加工工艺,进行有针对性的研究。 4、设计搭建了压电驱动低压水液压节流阀的性能实验系统,并对其进行了调试与实验分析,总结了影响调试实验结果的原因。
[Abstract]:Water hydraulic transmission technology is a new technology which directly uses seawater or fresh water as working medium. Compared with traditional oil pressure technology, it has the advantages of no pollution, anti-combustion, energy saving, wide source and so on. It adapts to the requirements of human sustainable development and environmental protection. Low pressure hydraulic technology, as an effective way to solve the cost problem of water hydraulic components, is becoming the research focus of researchers in developed countries. It is a leading subject in the field of fluid transmission and control. Throttle valve, as an important component of fluid transmission and control system, is a kind of flow control valve, which can be used to adjust the flow rate of the system, load the pump and regulate the suction resistance of the inlet of the pump. It changes the liquid resistance by adjusting the size of the variable throttle, so as to control the flow rate. In this paper, a novel piezoelectric driven low pressure hydraulic throttle valve is designed on the basis of the existing hydraulic throttle valve. The piezoelectric stack driver has the advantages of fast response, large output force, high position accuracy, energy saving and easy control to control the opening of the throttle valve. The main work of this paper is as follows: 1. The basic theory of piezoelectric drive is introduced, and the characteristics of piezoelectric stack driver are studied in view of the key problems existing in piezoelectric stack driver. The experimental system for testing the characteristics of piezoelectric stack driver is designed and its characteristics are tested and analyzed. 2. According to the temperature and lag characteristics of piezoelectric stack driver, the corresponding improvement measures are put forward, and the temperature compensation mechanism and pretightening force regulating device of piezoelectric stack driver are designed. The simulation analysis and experimental study of piezoelectric stack driver under the action of pretightening force are carried out by using AMESm software, and the ideal range of pretightening force is determined. 3. Aiming at a series of key technical problems, such as corrosion, sealing and cavitation, in the development of piezoelectric driven low pressure hydraulic throttle valve, the selection of valve structure form, material characteristic analysis and selection, seal form selection and processing technology are studied. 4. The performance experimental system of piezoelectric driven low pressure hydraulic throttle valve is designed and built, and its debugging and experimental analysis are carried out, and the reasons affecting the debugging experimental results are summarized.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.5

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