What pressure does a vortex gas flowmeter display

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What is the difference between a swirl flowmeter and a vortex flowmeter? The turbine flowmeter consists of a turbine, bearings, preamplifier, and display instrument. The principle of a turbine flowmeter is to place a turbine in the center of a pipeline, supported by bearings at both ends. When the fluid passes through the pipeline, it impacts the turbine blades, generating a driving torque for the turbine, which overcomes the friction torque and fluid resistance torque to produce rotation. Within a certain flow range, for a certain viscosity of the fluid medium, the rotational angular velocity of the turbine is proportional to the fluid flow velocity. Therefore, the fluid flow velocity can be obtained from the rotational angular velocity of the turbine, and the fluid flow rate through the pipeline can be calculated. The rotational speed of the turbine is detected by a sensing coil installed outside the casing. When the turbine blades cut the magnetic field lines generated by the permanent magnetic steel inside the casing, it will cause changes in the magnetic flux in the sensing coil. The sensing coil will send the detected magnetic flux periodic change disturbance signal to the front end. Amplifier, amplifying signals Shaping generates a pulse signal proportional to the flow rate, which is sent to the unit conversion and flow accumulation circuit to obtain and display the accumulated flow value; At the same time, the pulse signal is also sent to the frequency current conversion circuit, which converts the pulse signal into an analog current and indicates the instantaneous flow rate value. The measured fluid impacts the turbine blades, causing the turbine to rotate. The speed of the turbine changes with the change of flow rate, that is, when the flow rate is high, the speed of the turbine is also high. Then, the speed of the turbine is converted into electrical pulses of the corresponding frequency by the magneto electric conversion device, amplified by the preamplifier, and sent to the display instrument for counting and display. The instantaneous flow rate and cumulative flow rate can be calculated based on the number of pulses and cumulative pulses per unit time. The working principle of a turbine transmitter is that when the fluid flows along the axis of the pipeline and impacts the turbine blades, a force proportional to the product of the flow rate qv, flow velocity V, and fluid density ρ acts on the blades, driving the turbine to rotate. While the turbine rotates, the blades periodically cut the magnetic field lines generated by the electromagnet, changing the magnetic flux of the coil. According to the principle of electromagnetic induction, a pulsating electric potential signal is induced in the coil, and the frequency of this pulsating signal is proportional to the flow rate of the measured fluid, where qv is the total volume of the fluid and N is the total number of pulsations generated by the transmitter; ξ is the flow coefficient. ξ is an important characteristic parameter of turbine transmitters, and different instruments have different ξ values, which vary with the wear and tear of the instruments during long-term use; Its meaning is the number of pulses output by the transmitter when a unit volume flow rate passes through the transmitter. The pulse signal output by the turbine transmitter can be amplified by an amplifier before being sent to the display instrument for flow measurement. If you want to know more detail

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