Liquid turbine flow meter

Place a turbine in the center of the pipeline, supported at both ends by bearings. When the fluid passes through the pipeline, it impacts the blades of the turbine flowmeter, generating a driving torque that causes the turbine flowmeter to overcome friction torque and fluid resistance torque and rotate. Within a certain flow range, the rotational angular velocity of a turbine flowmeter is proportional to the fluid flow velocity for a certain viscosity of the fluid medium. Thus, the fluid velocity can be obtained by the rotational angular velocity of the turbine flowmeter, and the fluid flow rate through the pipeline can be calculated.

The speed of the liquid turbine flowmeter is detected by a sensing coil installed outside the casing. When the turbine flowmeter blades cut the magnetic field lines generated by the permanent magnet inside the housing, it will cause changes in the magnetic flux in the sensing coil. The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, amplifies and shapes the signal, generates a pulse signal proportional to the flow rate, and sends it to the unit conversion and flow integration 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 quantity and indicates the instantaneous flow rate value.

The liquid turbine flowmeter uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate. This type of flowmeter is used to detect instantaneous flow and total cumulative flow, and its output signal is frequency, which is easy to digitize. The induction coil and permanent magnet in the picture are fixed together on the housing. When the ferromagnetic turbine blades pass through the magnet, the magnetic resistance of the magnetic circuit changes, thereby generating an induction signal. The signal is amplified and shaped by an amplifier and sent to a counter or frequency meter to display the total accumulated flow rate. Simultaneously, the pulse frequency is converted from frequency to voltage to indicate instantaneous flow rate. The rotational speed of the impeller is proportional to the flow rate, and the rotational speed of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal, which not only improves the anti-interference ability of the detection circuit, but also simplifies the flow detection system. Its range ratio can reach 10:1, and the accuracy is within ± 0.2%. The time constant of a turbine flowmeter with small inertia and size can reach 0.01 seconds.

Liquid turbine flow meters are widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, and low-temperature fluids.

The output signal of the turbine flowmeter is pulse, which is easy to digitize. Turbine flow meters have low pressure loss, anti-corrosion blades, and can measure viscous and corrosive media.

Create a pulse signal that is inversely proportional to the flow rate. When the fluid passes through the pipeline, the torsional angular velocity of the turbine displacement gauge is inversely proportional to the fluid flow rate Placing a turbine at the center of the pipeline will cause a change in the magnetic flux in the sensing coil. The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, and also sends the pulse signal to the frequency current conversion circuit, amplifying and shaping the signal to suppress the friction torque and fluid resistance torque of the turbine displacement meter and cause tampering. The driving torque of the turbine torque meter,

When the blades of a liquid turbine flowmeter cut the magnetic field lines ignited by the permanent magnet inside the casing, the fluid flow velocity can be altered by the turbine flowmeter, and the angular velocity can be lost. The pulse signal is converted into an analog current, and the viscosity of the fluid medium and the rotational speed of the turbine displacement meter are detected by a sensing coil installed outside the casing. Both ends are supported by bearings. Thus, it is necessary to compete and debate the fluid flow rate through the process pipeline. Indicate instantaneous traffic values in uncertain traffic domains. Input into the unit conversion and flow integration circuit to obtain and disclose the performance of the heap flow value.