Gas turbine flow meter is a commonly used flow meter product, with advantages of high precision, good repeatability, simple structure, small size, light weight, low pressure loss, long life, simple operation, easy maintenance and so on. Today we mainly introduce gas turbine flow meter measurement principles and characteristics, and hope to help everyone. Gas Turbine Flow Meter Measurement Principle The fluid flows through the gas turbine flow meter housing. Because the blades of the impeller have a certain angle with the flow direction, the momentum of the fluid causes the blades to have a rotating torque. After the friction torque and the fluid resistance are overcome, the blades rotate, and the rotational speed is stable after the moment is balanced. Under the conditions, the rotation speed is proportional to the flow velocity. Because the blade has magnetic permeability, it is in the magnetic field of the signal detector (consisting of permanent magnet and coil). The rotating blade cuts the magnetic flux and periodically changes the magnetic flux of the coil. An electric pulse signal is induced at both ends of the coil. This signal is amplified and shaped by an amplifier in the gas turbine flow meter to form a continuous rectangular pulse wave of a certain amplitude, which can be transmitted far to the display instrument to show the instantaneous flow or total amount of the fluid. In a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the turbine flow sensor . The flow equation is: q=3600*(f/k) where: f—pulse frequency [Hz] k - The meter factor of the sensor [1/m3], given by the checklist. Q - Instantaneous flow rate of fluid (operating state) [m3/h] 3600 - Conversion Factor The coefficient of each gas turbine flow meter is filled in by the manufacturer in the verification certificate, and the k value is set in the display gas turbine flowmeter In the middle, instantaneous flow and cumulative totals can be displayed. Gas Turbine Flowmeter Features The pressure loss is small, and the impeller has anti-corrosion function; The advanced ultra-low-power single-chip microcomputer technology is adopted, and the whole machine has strong functions, low power consumption and superior performance. Intelligent flow monitor with nonlinear accuracy compensation . The correction formula accuracy is better than ±0.02%. Button may be provided online meter factor, and can be displayed on the LCD screen, an LCD screen clear and intuitive use reliability EEPROM cumulative flow meter factor brownout protection, protection longer than 10 years using high-performance central processing unit MCU, to complete the data Acquisition and processing display, output, and instantaneous flow rate of the integrated display are realized with the human-machine interface that is convenient for on - screen display . The data is transmitted in the standard 485 format.
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