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What are the flow regulation methods for metering pumps?
2. Structural principle of elliptical gear flowmeter
The elliptical gear flowmeter is a high-precision measuring instrument used for continuous measurement of liquid flow in pipelines, and is a representative product of volumetric flow meters. Its structural principle is as follows: the overall composition of the elliptical gear flowmeter is mainly composed of a flow transmitter and a counting mechanism. Core components of flow transmitter: The key part of the flow transmitter is the measuring chamber, which is equipped with a pair of elliptical gear rotors and a sealed coupling. The measuring chamber, elliptical gear, and cover plate together form a crescent shaped cavity, which is the basic unit of flow measurement. Work driven: The rotation of the elliptical gear is driven by the pressure difference at the inlet and outlet of the flowmeter. When the liquid flows into the flowmeter, the pressure at the inlet is higher than that at the outlet. Under the action of this pressure difference, the elliptical gear begins to rotate. Liquid metering and transportation: The elliptical gear continuously rotates, metering the liquid at the inlet through the crescent shaped cavity, and then transporting it to the outlet. For each rotation, the amount of liquid flowing through is four times the volume of the lunar cavity. Components of the counting mechanism: The counting mechanism includes a deceleration mechanism, an accuracy adjustment mechanism, and a counter. Partial elliptical gear flow meters can also be equipped with pulse transmitters in the counting mechanism. Working process: The sealed coupling is responsible for transmitting the total number an
3. Structure and principle of elliptical gear flowmeter
The elliptical gear flowmeter consists of a flow transmitter and a counting mechanism, and its working principle is based on the rotation of the elliptical gear to measure fluid flow.
.1. The structure of an elliptical gear flowmeter mainly includes two parts: a flow transmitter and a counting mechanism. Flow transmitter measurement room: The measurement room is equipped with a pair of elliptical gear rotors, which together with the cover plate form a crescent shaped cavity, which serves as the unit of measurement for flow. Sealed coupling: The sealed coupling is used to transmit the rotational motion of the elliptical gear to the counting mechanism while ensuring the sealing of the measuring chamber. Counting mechanism deceleration mechanism: used to slow down the rotational speed of elliptical gears for more accurate counting. Adjustment mechanism: used to adjust the sensitivity of the counting mechanism to ensure the accuracy of measurement. Counter: used to record and display the total amount of fluid passing through the flowmeter. Messenger: used to convert traffic signals into electrical signals for remote monitoring and automatic control. In
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