【作者】 朱鼎；

【导师】 刘银水；

【作者基本信息】 华中科技大学 ， 机械电子工程， 2008， 硕士

【摘要】 水液压传动技术是一门新型技术,以水(含海水和淡水)作为工作和润滑介质,不再需要添加任何其它润滑剂,具有不燃烧、对环境无污染、系统压缩损失小、响应快、温升低、沿程损失和局部损失小、系统维护成本低等优点。水压变量泵是当前水压传动技术研究最前沿的课题,是水压传动系统中的核心工作元件之一;相对水压定量泵,水压变量泵的优点是能够实现功率调节,节省能源,减少系统发热,延长泵的使用寿命。本文在总结了国内外水压定量泵及传统油压变量泵现状的基础上,对水压变量泵的设计理论和方法进行了研究;分析了水压变量泵的设计理论和方法与传统油压变量泵的异同以及水压变量泵设计中存在的关键问题,并提出了相应的解决措施;确定了以恒压盘配流通轴式斜盘轴向柱塞泵为水压变量泵的总体结构,并对基泵的主要结构参数进行了设计计算。针对水介质的特点,本文对恒压水压变量泵的变量机构进行了设计,变量机构由控制阀和变量驱动机构两部分组成,文中分别对两部分进行了研究,设计出适合以水为工作介质的结构。通过对变量泵的容积效率进行分析计算,得出了变量泵泄漏量所占的百分比,从而为在结构设计上控制泄漏提供了指导。水压变量泵控制系统是一个位置控制系统,本文在结构设计的基础上建立了水压变量泵的数学模型,分析了恒压阀阀芯位移、阀芯半径、弹簧刚度及变量缸腔半径等参数对泵动态性能的影响,并研究了水的理化性能对水压变量泵动态性能的影响。本文对水压变量泵的结构形式作了探讨性研究,确定了泵的结构方案,并从理论上对本方案的可行性作了论证,为水压变量泵样机的研制奠定了基础。随着新材料和新工艺的发展,水压变量泵的研制将逐渐成为现实,这对推动水压传动技术的广泛应用和节省能源有着十分重要的意义。更多还原

【Abstract】 Water hydraulic transmission technology is a new technology which uses water, including sea water and fresh water, as working medium and lubrication medium in a hydraulic system. It has advantages of fire resistance, no pollution, small losses for compression, fast response, low temperature rise, small pressure loss and low maintenance cost. Water hydraulic variable displacement pump, the most front topic of current hydraulic pressure transmission engineering research field, is one of the core working cells of hydraulic pressure transmission system. Compared to water hydraulic quantitative pump, water hydraulic variable displacement pump’s merit obtains power regulation and energy conservation and can reduce the system’s heat loss, lengthen pump’s service life.In this thesis, the newest domestic and overseas general researching and application of water hydraulic quantitative pump and oil hydraulic variable displacement pump are summarized. The differences of design theory and methods between them are studied. The key questions of designing water hydraulic variable displacement pump are analyzed and the solutions are discussed. Then the gross structure plan is determined and the primary structure parameters of this pump are calculated. In view of the water medium characteristic, this paper has carried on the design to the constant pressure water hydraulic variable displacement pump’s stroking mechanism. A stroking mechanism is composed of the control valve and the variable driving mechanism. This thesis has conducted the research separately to two parts, designs suits take the water as the working medium structure.In this thesis, the volumetric efficiency of the system is analyzed, the percentage of leakage of variable pump is calculated and the leakage control of structural design can give guidance. Water hydraulic variable displacement pump control system is a position control system. The mathematical model of variable displacement pump is set up based on structural design. The constant pressure valve spool displacement, spool radius, spring stiffness ,variable cylinder cavity radius, physical and chemical properties of water to the variable pump in dynamic performance is analyzed.The thesis study on the structure of the variable displacement piston pump and design an innovative variable displacement piston pump. The feasibility of such a design is also discussed which provides theory basis for the research and manufacture of the pump. Conclusion and prospect of the whole project and this dissertation is pointed out. This dissertation believes water hydraulics will have a prospective future with the development of new material, new technology and new process.更多还原