Principle of metal rotor flowmeter | Difference between metal rotor flowmeter and metal float flowmeter

『Principle of metal rotor flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid 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. The difference between metal rotor flowmeter and metal float flowmeter

The main differences between metal rotor flowmeter and metal float flowmeter are reflected in their characteristics, measurement principles, and applicable scenarios.

1. Different characteristics: Metal float flowmeter: very suitable for measuring small pipe diameters and low flow rates on site, with low requirements for straight pipe sections.

. Its structure is simple, maintenance is minimal, and the cost is relatively reasonable. Metal rotor flowmeter: It is more adaptable to complex and difficult to cope with on-site environments that ordinary instruments cannot handle, and is more suitable for measurement in the industrial field.

Secondly, the measurement principle is slightly different. Metal float flo

Principle of metal rotor flowmeter | Difference between metal rotor flowmeter and metal float flowmeter

1. Working principle of rotor flowmeter

2. The difference between metal rotor flowmeter and metal float flowmeter

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