容积式流量计性能及应用  

Research on the Characteristics and Application of Positive Displacement Flowmeter

作　　者：何君[1] 门金来[1] 陈杰[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《机械设计与研究》2012年第3期119-121,共3页Machine Design And Research

摘　　要：容积式流量计的性能包括精度、误差和量程,其优劣通过流量系数体现。文中从流量计原理入手,研究了流量系数的变化规律;分析了流量系数变化的形成机理;提出了流量系数与设计尺寸、制造精度、压力损失以及摩擦特性等因素相关的理论观点;并最终总结了改善容积式流量计性能的途径。The flow coefficient is an important parameter which shows the property of the Positive Displacement Flowmeter （PDF）. Based on the basic principle of PDF, the authors thoroughly studied the changes of the flow coeffi- cient together with the causes, and pointed out that the flow coefficient is much dependent on sensor＇ s dimension, ma- chining accuracy, pressure-drop and inevitable frictions etc. In the end, some practical approaches which can improve the PDF＇s characteristics are summarized.

关 键 词：容积式流量计 椭圆齿轮 流量系数 泄漏 压力损失 系数缓变区 

分 类 号：U467.4[机械工程—车辆工程]