Stainless steel rotor flowmeter | Measurement method and instrument selection of rotor flowmeter

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1. Structural principle of stainless steel glass rotor flowmeter

The main measuring components of the flowmeter are a vertically installed lower small and upper large conical glass tube and a float that can move up and down in an upward and downward position inside. When the fluid passes through the conical glass tube from bottom to top, a pressure difference is generated between the upper and lower parts of the float, and the float rises under this pressure difference. When the upward force, the trembling buoyancy and viscous lift acting on the float are equal to the weight of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the fluid flow rate flowing through the flowmeter and the rising height of the float, that is, the flow area of the flowmeter. The position height of the float can be used as a measure of flow rate.

2. Working principle of metal rotor flowmeter

The structure of a metal rotor flowmeter consists of two main parts: one is a conical tube that gradually expands from the bottom, and the other is a rotor with a freely movable centerline.

. When measuring fluid flow rate, the flow defect modifier flows in from the bottom of the conical tube, generating an impact force on the rotor. The magnitude of this force increases with the increase of flow rate. When the flow is large enough, this signal sensitivity is strong enough to lift the rotor and make it rise. At the same time, the fluid flows out from the top through the annular section between the rotor and the conical tube wall. When the force exerted by the fluid on the rotor reaches equilibrium with the weight of the rotor in the fluid (i.e., the displayed weigh Stainless steel rotor flowmeter

t), the rotor stays at a certain height. In this case, there is a direct relationship between the position and height of the rotor in the conical tube and the flow rate. By observing the height of the rotor, we can calculate the corresponding flow rate value. In order to ensure that the rotor does not touch the pipe wall when moving up and down on the centerline, the Zhongneng metal rotor flowmeter adopts two strategies. The first type is equipped with a guiding core rod, which maintains the movement of the rotor along the centerline of the conical tube. Another method is to design inclined slots at the edge of the rotor disk. When the fluid flows from bottom to top, it will bypass the rotor and generate reverse thrust through the inclined slots, causing the rotor to continue rotating near the centerline and avoiding collision with the pipe wall. The materials used to make rotors usually include various materials such as stainless steel, aluminum, and bronze to adapt to different working environments and requirements.

3. How to read the flow rate of a rotor flowmeter? The reading method of a rotor flowmeter depends on its material. For flow meters made of plastic, you only need to look at the topmost surface, which will display the current flow value. For flow meters made of stainless steel materials, you need to pay attention to the most obvious line between the sails, which indicates the current working status and flow rate of the flow meter. Specifically, the top surface of plastic flow meters usually has a clear dial with markings indicating different flow values. You only need to align the pointer on the dial to read the accurate flow rate value of the sedan. The middle line of the stainless steel flowmeter

Stainless steel rotor flowmeter | Measurement method and instrument selection of rotor flowmeter

1. Structural principle of stainless steel glass rotor flowmeter

2. Working principle of metal rotor flowmeter

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