油驱水压泵设计与分析

发布时间：2018-02-25 20:11

本文关键词： 水压技术水压变量泵水冷式油箱共振　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：现代水压技术是采用自来水、海水等取代液压油从而形成的新的驱动技术或传动技术。现代水压驱动技术区别于古代的水压技术和现代的油压驱动技术,主要原因在于水压技术有多方面的特殊性,如介质、材料和结构等。目前,机械和液压传动等传统的动力传动技术已经发展的相当成熟。但传统的动力传动大多难以避免对环境的污染和资源的浪费等问题,因此,迫于驱动技术的革新,水压技术重新浮现在人们的视野当中。为达到环保、节能的目的,世界各国逐步开始了对水压技术的深入研究,并投入了大量的人力物力,在国内水压技术起步较晚,但已经将水压技术作为绿色工程项目发展开来。本比例控制水压变量泵采用油压元件和水压元件进行混合设计,由油压元件和水压元件及机械机构等构成。既适合作为传输介质水压泵结构,也适合作为能量传输水压泵结构。结构通过油压元件控制水压缸,使水压缸往复运动实现吸水、排水,实现水压变量泵功能。系统只采用了少量结构简单、工艺不高的水压元件(水压缸、单向阀、蓄能器),驱动和控制设计则采用油压元件。由于油压元件的开发技术成熟可靠,控制性能高,发展水平高,作为水压泵的驱动和控制可以有效降低体积,提高可靠性,提高控制性能。本文首先根据要达到的输出要求,提出了水压泵的整体设计方案;另外,作为一种对集成度有高度要求的油压、水压一体化元件,实现体积小、重量轻、结构紧凑是结构设计要解决的关键问题之一。而油压系统中油箱对该水压泵体积影响最大,为此,结合新型水压变量泵特点,采用了水冷式油箱,并通过Fluent优化设计,有效地降低了油箱的体积;而水压缸是该水压缸变量泵重要元件,在整个结构中所占质量较大。为了实现结构轻量化的思想,通过ANSYS Workbench建立了水压缸的有限元模型,并在水压缸的极限工况下,对其进行模态分析和静力学分析。在保证刚度、强度满足设计要求下,不仅减轻了机构的质量,还提高了水压缸的固有频率,有效的避免了共振的产生,为水压泵系统中其他机构的优化提供了参考。
[Abstract]:Modern water pressure technology is a new driving technology or transmission technology formed by replacing hydraulic oil with tap water and sea water. The modern water pressure driving technology is different from the ancient water pressure technology and the modern oil pressure driving technology. The main reason lies in the particularity of water pressure technology in many aspects, such as medium, material and structure, etc. At present, The traditional power transmission technology, such as machinery and hydraulic transmission, has been developed quite maturely. However, most of the traditional power transmission is difficult to avoid the problems of environmental pollution and waste of resources, so it is forced by the innovation of driving technology. Water pressure technology has resurfaced in people's view. In order to achieve the goal of environmental protection and energy saving, various countries in the world have gradually begun to study water pressure technology in depth, and invested a lot of manpower and material resources, and started relatively late in domestic water pressure technology. However, water pressure technology has been developed as a green engineering project. It is composed of oil pressure element, water pressure element and mechanical mechanism. It is suitable for the structure of water pressure pump as transmission medium as well as the structure of water pressure pump for energy transmission. The structure controls the hydraulic cylinder through the oil pressure element to make the water pressure cylinder reciprocate and realize water absorption. Drainage, realize the function of water pressure variable pump. The system only uses a small number of water pressure elements (hydraulic cylinder, unidirectional valve, etc.) which are simple in structure and low in technology. Oil pressure components are used in the design of accumulator, drive and control. As the development technology of oil pressure components is mature and reliable, the control performance is high and the level of development is high. As the drive and control of hydraulic pump, the volume can be effectively reduced and the reliability can be improved. Firstly, according to the output requirements to be achieved, the overall design scheme of hydraulic pump is put forward, in addition, as a kind of oil pressure and hydraulic integration component with high integration level, it can achieve small volume and light weight. Compact structure is one of the key problems to be solved in the structural design. In the oil pressure system, the oil tank has the greatest influence on the volume of the pump. Therefore, combining with the characteristics of the new type of water pressure variable pump, the water-cooled tank is adopted and the optimized design is carried out by Fluent. The volume of the tank is reduced effectively, and the hydraulic cylinder is an important component of the variable pump of the hydraulic cylinder, which occupies a large mass in the whole structure. In order to realize the idea of lightweight structure, the finite element model of the hydraulic cylinder is established through ANSYS Workbench. Modal analysis and static analysis are carried out under the limit condition of hydraulic cylinder. Under the condition that stiffness and strength meet the design requirements, not only the quality of the mechanism is reduced, but also the natural frequency of the hydraulic cylinder is improved. The resonance is avoided effectively, which provides a reference for the optimization of other mechanisms in the hydraulic pump system.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH137.51

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