Overview
The SHYYLUGB series vortex flowmeter is an important instrument for flow measurement and automatic control, which can be used for flow measurement of gases, liquids, and vapors. It is widely used in industries such as petroleum, chemical, metallurgical, thermal, textile, papermaking, power, environmental protection, and municipal construction.
Working principle
If a non streamlined vortex generator (anti fluid) is set up in the fluid, two columns of regular vortices are alternately generated from both sides of the vortex generator. This type of vortex is called a Karman vortex street.
1. Vortex generator 2. Piezoelectric sensor
The vortices are arranged asymmetrically downstream of the vortex generator. Assuming the frequency of vortex occurrence is f, the average velocity of the incoming flow of the measured medium is V, the width of the upstream face of the vortex generator is d, and the diameter of the body is D, according to the principle of Karman vortex street, the following relationship is obtained:
Formula (1) for f=StV/d
In the formula:
F - frequency of Karman vortex generated on one side of the body
St Strouhal number (dimensionless number)
V - Average flow velocity of fluid
D - width of vortex generator
From this, it can be seen that the instantaneous flow rate can be calculated by measuring the separation frequency of the Karman vortex street.
MAIN FUNCTION AND FEATURES
It has a wide measurement range, high accuracy, low pressure loss, high reliability, and long-term stability.
Simple structure, easy installation and maintenance, no movable parts, and no mechanical wear.
The brand new appearance design adopts precision casting technology for the body, which has a beautiful appearance, high temperature resistance, and strong corrosion resistance.
Common signals include pulse or analog signals, which are stable and have strong anti-interference ability.
Technical Parameter
Measurement medium: liquid, general gas, steam
Nominal diameter: DN15~DN300 (full pipe type), DN150~DN2000 (plug-in type), DN2000 and above caliber supplied according to protocol
Medium temperature: -40~100 ℃ (normal temperature), 100~250 ℃ (medium temperature), 100~320 ℃ (high temperature)
Nominal pressure: 1.6MPa, 2.5MPa, 4.0MPa (>4.0 protocol supply)
Accuracy: ± 1% R, ± 1.5% R (full tube type)
± 1.5% R, ± 2.5% R (plug-in)
Power supply:+12VDC (three wire pulse output),+24VDC (three wire pulse output type and two wire current output type)
3.6V lithium battery, dual power supply
Body material: 304 (supplied under other material agreements)
Protection level: IP65 (supplied under other protection level agreements)
Environmental conditions: temperature -20 ℃~55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106kPa.