液动隔膜泵动力端液压系统分析与研究

发布时间：2018-01-11 15:43

本文关键词：液动隔膜泵动力端液压系统分析与研究　出处：《西南石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：近年来,料浆输送设备的不断发展使得隔膜泵在冶金、矿山、石化等行业中得到越来越广泛地应用。和传统的机械液压式的隔膜泵相比,液压驱动的隔膜泵还具有体积小、功率大、出口流量稳定、噪声低等特点,在市场中具有较强的竞争力,该类产品的国产化和系列化是具有经济价值的研究课题。本文首先介绍了隔膜泵的起源与发展,以及液动隔膜泵的研究现状,明确了液动隔膜泵动力端的功能和要求,即传递能量、节约能源的同时保证总泵出口流量稳定。本文主要采用理论设计、数学建模分析和计算机数字仿真相结合的研究方法,将液压系统拆分为液压回路及控制系统两个主要部分进行设计、分析与研究。具体内容主要包括：(1)对比机械液压式与液压传动式隔膜泵优缺点,并以工程上应用广泛的卧式三缸单作用隔膜泵为例阐述液动隔膜泵工作原理及三缸运动规律：三缸采用“匀加速-匀速-匀减速”运动规律,并满足一定相位差可满足工作要求；(2)分析液压缸位置速度控制回路及负载敏感液压回路原理,并在此基础上设计出液动隔膜泵的液压回路,随后对回路中的关键元件,包括组合缸、动力端液压缸等进行了分析与计算；(3)对液压缸位置速度控制回路中的非对称阀控非对称液压缸、电液比例换向阀环节以及负载敏感液压回路中的对称阀控缸环节进行数学建模分析,并从数学模型出发分析设计了关键环节的控制策略,通过参数整定完成了PID控制器设计；(4)结合AMESim液压仿真软件及MATLAB/sinulink工具箱分别建立了液压模型及控制系统模型,利用联合仿真的技术手段对液压系统进行仿真,验证了所设计的三缸位置调整系统满足需求,同时验证了该液压系统的的动静态特性、总泵流量及压力曲线是符合理论设计的,这也反过来证明液压回路及液压控制系统设计的合理性。本文较为全面和完整地展示了液动隔膜泵液压系统的设计过程,在液压系统设计过程中融入了自己对关键环节的思考,可为液压系统的设计提供参考。
[Abstract]:In recent years, with the continuous development of slurry transportation equipment, diaphragm pump is more and more widely used in metallurgical, mining, petrochemical and other industries, compared with the traditional mechanical hydraulic diaphragm pump. Hydraulic drive diaphragm pump also has the characteristics of small volume, large power, stable outlet flow, low noise and so on, so it has strong competitiveness in the market. The localization and serialization of this kind of products is a research subject of economic value. Firstly, the origin and development of diaphragm pump and the research status of hydraulic diaphragm pump are introduced in this paper. The functions and requirements of the power end of the hydraulic diaphragm pump are defined, that is, transmitting energy, saving energy and ensuring the flow stability of the total pump outlet. This paper mainly adopts the theoretical design. By combining mathematical modeling and computer digital simulation, the hydraulic system is divided into two main parts: hydraulic circuit and control system. Analysis and research. The concrete contents mainly include comparing the advantages and disadvantages of mechanical hydraulic diaphragm pump and hydraulic drive diaphragm pump. Taking horizontal three-cylinder single-acting diaphragm pump widely used in engineering as an example, the working principle and three-cylinder motion rule of hydraulic diaphragm pump are expounded: the three-cylinder adopts "uniform acceleration, uniform speed and uniform deceleration" motion rule. And meet certain phase difference can meet the requirements of the work; Secondly, the principle of hydraulic cylinder position and speed control circuit and load sensitive hydraulic circuit are analyzed, and the hydraulic circuit of hydraulic diaphragm pump is designed on this basis, and then the key components in the circuit, including the combined cylinder, are designed. The hydraulic cylinder at the power end is analyzed and calculated. 3) Mathematical modeling and analysis of asymmetric valve controlled asymmetric hydraulic cylinder, electro-hydraulic proportional directional valve link and symmetrical valve control cylinder link in load sensitive hydraulic circuit. The control strategy of the key link is analyzed and designed from the mathematical model, and the PID controller is designed by setting the parameters. Combined with AMESim hydraulic simulation software and MATLAB/sinulink toolbox, the hydraulic model and control system model are established respectively. The hydraulic system is simulated by the technical means of joint simulation, which verifies that the designed three-cylinder position adjustment system meets the requirements, and the static and dynamic characteristics of the hydraulic system are verified at the same time. The flow and pressure curves of the total pump are in accordance with the theoretical design. This in turn proves the rationality of the design of hydraulic circuit and hydraulic control system. The design process of hydraulic system of hydraulic diaphragm pump is presented in this paper. In the process of hydraulic system design, I have integrated my own thinking on key links, which can provide reference for the design of hydraulic system.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH137.51

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