二维活塞式动态流量计研究  

Investigation on Two-dimensional Piston Dynamic Flowmeter

作　　者：丁川 陈豪奇 王熙 詹磊 章立超 阮健[1] DING Chuan;CHEN Haoqi;WANG Xi;ZHAN Lei;ZHANG Lichao;RUAN Jian(College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Kunming Branch of Xi an Precision Machinery Research Institute,Kunming 650101,China)

机构地区：[1]浙江工业大学机械工程学院,杭州310023 [2]西安精密机械研究所昆明分部,昆明650101

出　　处：《农业机械学报》2022年第4期450-458,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(51805480);浙江省自然科学基金项目(LY21E050013);国家重点研发计划项目(2019YFB2005201)。

摘　　要：提出一种二维活塞式动态流量计,其计量单元二维活塞具有两个运动自由度,包括直线往复运动和转动。因此该流量计兼顾无负载动态缸测量流量的高动态特性和转子式流量计连续测量流量的能力。阐述该流量计的机械结构和工作原理,通过建立动力学方程和流量连续性方程获得对应的数学模型来研究流量计的动态特性。设计样机并搭建动态性能测试试验台进行试验研究。试验结果表明,二维活塞式动态流量计有较好的动态特性,当被测正弦流量振荡频率达5 Hz,二维活塞式流量计测得流量的频率仍与无负载动态缸测得的基本一致,两者相位差接近于零。流量计输出信号的幅值衰减较为严重,原因为流量计样机内存在空气所致。A two-dimensional piston dynamic flowmeter was proposed,which utilized the two-dimensional piston with two degrees of freedom as a measuring unit.The two dimensional piston simultaneously performed both reciprocating and rotating motions.Therefore,the flowmeter took into account the high dynamic characteristics of the no-loaded dynamic cylinder to measure the unsteady flow,and the ability of the rotor flowmeter to continuously measure the flow rate.The mechanical structure and working principle of the flowmeter were explained,and the corresponding mathematical model was obtained by establishing the dynamic equation and flow continuity equation to study the dynamic characteristics of the flowmeter.After that,a prototype was designed and manufactured.A dynamic performance test bench was built for experimental research.The results of experiments showed that the two-dimensional piston dynamic flowmeter had better dynamic characteristics.When the oscillation frequency of the measured sinusoidal flow signal reached 5 Hz,the frequency of the flow measured by the two-dimensional piston flowmeter was almost the same as that measured by the no-load dynamic cylinder,and the phase difference between these two signals was close to zero.However,the amplitude attenuation of the output signal of the flowmeter was more serious,which was caused by the presence of air in the flowmeter.

关 键 词：液压元件 动态流量 流量计 二维活塞 试验 

分 类 号：TH814[机械工程—仪器科学与技术]