锥形缸体柱塞泵的结构分析与特性研究

发布时间：2018-03-20 22:32

本文选题：柱塞泵　切入点：ADAMS　出处：《太原理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着全球经济的飞速发展,各种工程项目对设备的功率输出也有了更高的要求；随着全球环境的变化,要求各种产品都能够实现节能环保的功能。大型工程项目中对于液压传动设备的需求也越来越大,液压泵是整个液压传动系统的动力核心,对整个液压系统及至设备都有着重要的影响。柱塞泵具有压力高,结构紧凑,效率高及流量,压力,功率调节方便等特点,因而其在工程项目中得到广泛应用。目前轴向柱塞泵有柱形缸体和锥形缸体两大类,其中柱形缸体主要应用于小型柱塞泵。随着工业技术的发展,对大型柱塞泵的需求也逐渐增大,大型柱塞泵因为其流量调节区域或者压力调节区域值比较大,所以不宜采用柱形缸体。目前大型柱塞泵通常采用锥形缸体结构,不但可有效减小泵的整体尺寸,而且更有利于泵的吸油。论文以某公司生产的斜盘式高压柱塞泵为研究对象,利用ADAMS软件对该泵的吸压油组合模型进行仿真,具体内容有： 1.运用数学方法对锥形缸体轴向柱塞泵吸油和排油过程中的柱塞运动建立数学模型,分析工作过程中的柱塞沿缸体轴线方向的运动规律和绕缸体轴线径向的运动规律。 2.建立柱塞泵运动工况的数学模型；首先利用Pro/E软件对其吸压油零部件进行三维实体建模和虚拟装配,并将装配模型导入到ADAMS中,添加约束和驱动后,得出柱塞在泵运转过程中的运动规律。 3.运用数学解析方法对锥形缸体轴向柱塞泵配流副油膜,滑靴底部油膜支撑特性进行理论推导,得出配流盘、缸体结构形式和配流副油膜支撑特性间的关系,以及滑靴底部结构和滑靴底部油膜支撑特性间的关系。仿真研究结果表明,柱塞球心在柱塞轴线方向的位移呈余弦分布,对应的速度呈正弦分布,加速度呈余弦分布,柱塞球心绕缸体轴线的径向运动轨迹呈偏心椭圆分布。通过三维建模及运动仿真更真实的反映出柱塞在吸压油过程中的运动规律,发现柱塞在启动初期相对于理论推导的结果有一定的滞后,主要是受到吸压油各元件的惯性及元件间的相互碰撞等因素的影响。本课题还对锥形缸体配流油膜和滑靴底部油膜的压力特性进行了分析与研究,通过对两个油膜进行数学建模,发现在满足油膜支撑特性的情况下,油膜的压力特性和相应元件的结构之间存在一定的联系,并总结出了相应的压力特性公式,为后期人员的研究提供一定理论的基础。
[Abstract]:With the rapid development of the global economy, various engineering projects have higher requirements for the power output of the equipment, and with the change of the global environment, All kinds of products are required to realize the function of energy saving and environmental protection. The demand for hydraulic transmission equipment is increasing in large engineering projects, and the hydraulic pump is the power core of the whole hydraulic transmission system. It has an important effect on the whole hydraulic system and even the equipment. Piston pump is widely used in engineering projects because of its high pressure, compact structure, high efficiency and convenient flow rate, pressure and power regulation. With the development of industrial technology, the demand for the large piston pump is gradually increasing. The large piston pump has a large value because of its flow regulation area or pressure regulation area. At present, the conical cylinder structure is usually used in the large piston pump, which can not only effectively reduce the overall size of the pump, but also be more favorable to the oil absorption of the pump. This paper takes the skew disc high pressure piston pump produced by a company as the research object, and simulates the oil suction combination model of the pump by using ADAMS software. The specific contents are as follows:. 1. The mathematical model of piston movement in the process of oil absorption and oil discharge of cone cylinder axial piston pump is established by using mathematical method, and the movement law of piston along the axis of cylinder body and the radial movement law around the cylinder axis are analyzed in the process of operation. 2. The mathematical model of piston pump movement condition is established. Firstly, the three-dimensional solid modeling and virtual assembly of its oil suction parts are carried out by using Pro/E software, and the assembly model is imported into ADAMS, then the constraint and drive are added. The movement law of plunger during pump operation is obtained. 3. Theoretical derivation of the oil film supporting characteristics of the flow matching pair and the bottom of the slide shoe of the axial piston pump with conical cylinder block is carried out by using the mathematical analytical method, and the relationship among the flow distribution disc, the structure form of the cylinder block and the oil film supporting characteristic of the flow distribution pair is obtained. And the relationship between the bottom structure of the slipper and the oil film supporting characteristics at the bottom of the slipper. The simulation results show that the displacement of the plunger center in the direction of the plunger axis is cosine distribution, the corresponding velocity is sinusoidal distribution, and the acceleration is cosine distribution. The radial motion trajectory of the plunger center around the axis of the cylinder body presents an eccentric elliptical distribution. The movement law of the plunger in the process of oil absorption is more truly reflected by three-dimensional modeling and motion simulation. It is found that the plunger has a lag in the early stage of starting compared with the result of theoretical derivation. It is mainly affected by the inertia of the components and the collision between the components. The pressure characteristics of the oil film on the conical cylinder block and the oil film at the bottom of the slipper are also analyzed and studied. Through mathematical modeling of the two oil films, it is found that there is a certain relationship between the pressure characteristics of the oil film and the structure of the corresponding components under the condition of satisfying the oil film supporting characteristics, and the corresponding pressure characteristic formula is summarized. To provide a theoretical basis for the later study.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH322

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