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technical article
Principle of precession vortex flowmeter
2011-12-3 10:12:47

Flow meter consists of sensor and conversion display


、检测元件、整流器的壳体 Sensor includes vortex generator , detection element, and rectifier housing


有特定螺旋形叶片组成,它固定在壳体收缩段前端,强迫流体产生强烈的旋涡流 The vortex generator consists of a specific spiral blade, which is fixed at the front end of the shrinkage section of the shell, forcing the fluid to generate a strong vortex flow.

The detection element is installed near the throat of the expansion tube, and the precession vortex frequency signal can be detected with detection elements such as thermal, piezoelectric, strain, capacitance, or light solder.

The rectifier is fixed at the outlet of the surface of the flowmeter. Its role is to eliminate the vortex flow to reduce the effect of the flow pattern on the instrument measurement.


The shell is designed as a certain shape of flow channel, so that the vortex is formed to fix and protect the components installed inside, and is connected to the pipeline through the flange


Conversion display


The weak voltage signal detected by the piezoelectric sensor is amplified, filtered, and shaped into a pulse signal whose frequency is proportional to the flow rate, and then counted and displayed by the display device. The display instrument is equipped with an external input interface to output various information

No., the temperature and pressure of the measured gas medium can be compensated, converted into volume flow under standard conditions, and displayed