变面积孔板流量计活动锥体设计与研究  

Design and Study of Movable Cone for Variable Area Orifice Flowmeter

作　　者：周艳 徐旷宇 朱宁 李宁 ZHOU Yan;XU Kuangyu;ZHU Ning;LI Ning(Hunan Institute of Metrology And Test,Changsha,Hunan 410014,China)

机构地区：[1]湖南省计量检测研究院,湖南长沙410014

出　　处：《计量学报》2025年第2期184-189,共6页Acta Metrologica Sinica

基　　金：岳麓山工业创新中心衡山实验室技术攻关项目(HST2314);湖南创新型省份建设专项自然科学基金科市联合项目(2023JJ60534)。

摘　　要：通过对变面积孔板流量计的研究发现,活动锥体的表面形状是流量计的线性度和量程比的关键因素。设计了一种新型锥状体,使得变面积孔板流量计的流量与差压成线性关系。推导出了新型锥状体表面曲线的一种函数关系式,其主要影响因素为锥体表面加工精度和流量计的β值;比较了新型锥状体与普通圆锥体的流量和差压的线性关系,实验表明新型锥状体的线性范围更宽,其量程比大于150∶1。Through the study of variable area orifice flowmeter,it is found that the surface shape of the active cone is a key factor in the linearity and range ratio of the flowmeter.A new cone-shaped is designed,which makes the flow rate of the variable area orificeplate flowmeter linear with the differential pressure.A functional relation of the surface curve of a new cone-shaped is derived,the main influencing factors are the surface machining accuracy of the cone and theβvalue of the flow meter.The linear relationship between flow rate and differential pressure between a new cone-shaped and a regular conical body is compared,and experiments show that the linear range of the new cone-shaped is wider,and its range ratio is greater than 150∶1.

关 键 词：流量计量 变面积孔板流量计 活动锥体 差压 线性曲线 锥体位移 

分 类 号：TB937[一般工业技术—计量学] TP273[机械工程—测试计量技术及仪器]