The liquid turbine flowmeter is a kind of velocity flowmeter designed according to the torque balance principle. Widely used in petroleum, chemical industry, metallurgy, scientific research and other fields of measurement, control system. Liquid turbine flowmeters with sanitary fittings can be used in the pharmaceutical industry.
Fluid flows through the sensor shell, because the blade of the impeller has a certain Angle with the flow direction, the impulse force of the fluid makes the blade have a rotational torque, and after overcoming the friction torque and fluid resistance, the blade rotates, and the rotational speed is stable after the torque is balanced. Under certain conditions, the rotational speed is proportional to the velocity. It is placed in the magnetic field of a signal detector (consisting of a permanent magnetic steel and coil), and the rotating blade cuts the magnetic field lines, changing periodically
The magnetic flux of the coil, so that the coil at both ends of the induction of an electrical pulse signal, the signal is amplified by the amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the display instrument, showing the instantaneous flow or total amount of the fluid. Within a certain flow range, the pulse frequency f is associated with the instantaneous flow of the fluid flowing through the sensor.
