Pumpcylinder Composite Structure New Dynamic Flowmeter

Abstract

Abstract: Aiming at the problems of accurate measurement of the complex type of high frequency dynamic flow, a new type of dynamic and static flow meter was designed based on the composite structure of pump and cylinder. The noload cylinder portion of flow meter had good dynamic performance, which was responsible for the measurements of high frequency flow components. The metering pump portion might measure continuously and reciprocating, which was responsible for the measurements of lowfrequency and steady components. The metering pump was driven by a servo motor, and the angular velocity of metering pump was controlled to lead the equilibrium position of noload cylinder to zero. Through the measurements of the velocities of noload cylinder and the angular velocities of the pump, the complex dynamic flow might be obtained. Based on threedimensional design of flowmeter, utilizing AMESim to build the flowmeter physical model, using MATLAB to complete the flowmeter control system modular design, the cosimulation of pumpcylinder composite structure flowmeter was done to verify the dynamic performance of composite structure dynamic flowmeter and the rationality of design parameters.

Key words: dynamic flowmeter, pumpcylinder composite structure, system simulation, position control

摘要： 针对目前复杂类型的高频动态流量精确测量的难题，采用泵缸复合结构,设计了一种新型动、静态流量综合测量流量计。该流量计的无载液压缸部分动态性能好，负责高频流量成分的测量；计量泵部分可连续往复计量，负责低频稳态流量的计量。计量泵用伺服电机驱动，通过对计量泵的角速度控制，来使无载缸的平衡位置归零。通过对无载缸速度以及计量泵角速度的测量，可以综合得到被测复杂动态流量。在流量计三维设计的基础上，利用AMESim构建流量计物理模型，利用MATLAB完成流量计控制系统的模块化设计，然后进行联合仿真，对复合结构动态流量计的动态性能以及设计参数的合理性进行了验证。

关键词: 动态流量计, 泵缸复合结构, 系统仿真, 位置控制

CLC Number:

TH39

Liu Tao, Song Tao, Yao Hui, . Pumpcylinder Composite Structure New Dynamic Flowmeter[J]. China Mechanical Engineering.

刘涛, 宋涛, 姚辉, . 泵缸复合结构新型动态流量计[J]. 中国机械工程.

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