Stainless steel rotor flowmeter

『Stainless steel rotor flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Working principle of rotor flowmeter

The rotor flowmeter consists of two components, one of which is a conical tube that gradually expands from bottom to top; The other component of the rotor flowmeter is a rotor that is placed in a conical tube and can move freely along the centerline of the tube. When measuring the flow rate of a fluid, the measured fluid flows in from the lower end of the conical tube and impacts the rotor, generating a force on it (the magnitude of which varies with the flow rate); When the flow rate is large enough, the generated force lifts the rotor and raises it. At the same time, the measured fluid flows through the annular section between the rotor and the conical tube wall, and there are three forces acting on the rotor: the dynamic pressure of the fluid on the rotor, the buoyancy of the rotor in the fluid, and the gravity of the rotor itself. When the flowmeter is installed vertically, the center of gravity of the rotor coincides with the axis of the cone tube, and the three forces acting on the rotor are parallel to the axis of the tube. When these three forces reach equilibrium, the rotor floats smoothly at a certain position inside the cone tube. For a given rotor flowmeter, the size and shape of the rotor have been determined, so its buoyancy and self gravity in the fluid are known to be constants, only the dynamic pressure of the fluid on the float varies with the magnitude of the incoming flow velocity. Therefore, when the incoming flow velocity increases or decreases, the rotor will move upward or downward, and the flow cross-sectional area at the corresponding position will also change until the flow velocity reaches equilibrium at the corresponding speed, and the rotor

will be stable in the new position. For a given rotor flowmeter, the position of the rotor in the cone tube corresponds one-to-one with the flow rate of the fluid passing through the cone tube. In order to prevent the rotor from touching the pipe wall when moving up and down on the centerline of the conical tube, two methods are usually used: one is to install a guide core rod at the center of the rotor to keep the rotor moving up and down on the centerline of the conical tube, and the other is to open a groove at the edge of the rotor disk. When the fluid flows through the rotor from bottom to top, it bypasses the rotor while passing through the groove to generate a reverse thrust, causing the rotor to continuously rotate around the centerline, thus keeping the rotor from touching the pipe wall during operation. The rotor material of the rotor flowmeter can be made of stainless steel, aluminum, bronze, etc.

2. Structural principle of stainless steel glass rotor flowmeter

The structural principle of stainless steel glass rotor flowmeter is as follows

1. Structural composition: The main body is composed of a conical glass tube installed vertically with a small lower end and a large upper end.

. Float: It can move up and down inside the conical glass tube, used to indicate fluid flow rate. Working principle: Pressure difference generation: When the fluid passes through the conical glass tube from bottom to top, a pressure difference will be generated between the upper and lower parts of the float. Float rising: Under the action of this pressure difference, the float will rise until the rising force, buoyancy, and viscous lift of the float reach equilibrium with the gravity of the float itself. Stabl

1. Working principle of rotor flowmeter

2. Structural principle of stainless steel glass rotor flowmeter

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