涡轮流量计显示值与评估值差异原因

发布时间:2018-01-17 点击:3916次 发布人:admin

涡轮流量计显示值与评估值差异原因:

 

传感器流通通道内部故障如受流体腐蚀,磨损严重,杂物阻碍使叶轮旋转失常,仪表系数变化叶片受腐蚀或冲击,顶端变形,影响正常切割磁力线,检测线圈输出信号失常,仪表系数变化;流体温度过高或过低,轴与轴承膨胀或收缩,间隙变化过大导致叶轮旋转失常,仪表系数变化。

 

传感器背压不足,出现气穴,影响叶轮旋转。

 

管道流动方面的原因,如未装止回阀出现逆向流动旁通阀未关严,有泄漏传感器上游出现较大流速分布畸变(如因上游阀未全开引起的)或出现脉动液体受温度引起的粘度变化较大等。

 

显示仪内部故障

 

5.检测器中永磁材料元件时效失磁,磁性减弱到一定程度也会影响测量值传感器流过的实际流量已超出该传感器规定的流量范围。 

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