基于刚度模型分析流体压力对直管科氏质量流量计的影响  

The Analysis of the Process Pressure Effect on the Measure of the Straight Tube Coriolis Mass Flowmeter Based on the Stiffness Model

作　　者：任建新[1] 谭剑[1] 熊亮[1] 张鹏 

机构地区：[1]西北工业大学自动化学院,西安710072 [2]西安东风机电有限公司,西安710068

出　　处：《机械科学与技术》2012年第1期67-70,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(60974109)资助

摘　　要：直管科里奥利质量流量计测量管承受较高流体压力时发生微弯会产生测量误差。从测量管刚度模型入手,依据承受垂直于曲率面载荷的曲梁公式计算了受压力作用后微弯测量管的流量校准系数,将其与未受压力作用条件下的流量校准系数理论计算值相比较,得出流体工作压力高于仪表校准压力会造成直管质量流量计测量值偏大的结论。此结论和工业现场实测结果以及E+H公司给出的流量压力补偿数据相一致。For a straight tube Coriolis mass flowmeter,the slight curve of measure tube as the high pressure fluid flows will cause a measurement error.Beginning from the tube stiffness model,the flow calibrate coefficient of the slight curve tube is calculated with the curve beam formula based on the situation that load is vertical to the curvature,then compared with the flow calibrate coefficient of the straight tube as there is no pressure.It is concluded that the measured value is greater than the practical value when the high pressure fluid flows.The conclusion is consistent with industry field result and the datasheet of the E＋H.

关 键 词：科氏力 质量流量计 流体压力 微弯 灵敏度 

分 类 号：TH814[机械工程—仪器科学与技术]