What are the measurement ranges of Beijing turbine flowmeter?

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1. Working principle and structure of gas turbine flowmeter

Gas turbine flowmeter is an instrument used to measure gas flow. Its working principle and structure are as follows: When the measured gas flows through the sensor of the gas turbine flowmeter, the impeller inside the sensor will start to rotate with the help of the kinetic energy of the gas. When the impeller rotates, it periodically changes the magnetic resistance value in the magneto electric induction system. The change in magnetic resistance value causes the magnetic flux passing through the coil to periodically change. According to the principle of electromagnetic induction, the changing magnetic flux will generate electrical pulse signals in the coil. These electrical pulse signals are then amplified by an amplifier, and the amplified signals can be displayed locally or transmitted to the corresponding flow integrator, PLC (Programmable Logic Controller), or upper computer. By counting and processing electrical pulse signals, accurate measurement of gas flow rate or total amount can be achieved. The basic structure of a gas turbine flow sensor mainly consists of the following parts: housing: as the external protective structure of the entire sensor, it provides a stable working environment for other internal components, which can withstand certain base pressures and external environmental influences, and protect internal components from damage. Leading guide frame: Its function is to guide the gas entering the sensor, so that the gas can impact the impeller in a relatively stable and regular flow state, ensuring that the impeller can be uniformly stressed and rotate stably, thereby improving the accuracy of measurement. Impeller: It is the core

component of gas turbine flowmeter. When gas flows through, the impeller rotates under the kinetic energy of the gas, and its speed is proportional to the flow velocity of the gas. By detecting the rotational speed of the impeller, the flow rate information of the gas can be indirectly obtained. Rear guide frame: Corresponding to the front guide frame, it guides the gas flowing through the impeller again, allowing the gas to smoothly flow out of the sensor, reducing the impact of gas flow disorder on measurement results, and also helping to protect subsequent components. Compression ring: mainly used to fix and compress the internal components of the sensor, ensuring accurate relative positions between each component, ensuring the stability and reliability of the sensor during operation, and preventing measurement errors caused by loose components. Refueling system (DN40 and above): For gas turbine flow meters with a nominal diameter of DN40 and above, a refueling system is equipped. Its function is to provide lubrication for moving parts such as impellers, reduce friction between components, lower wear, extend the service life of sensors, and also ensure smoother rotation of impeller debris, improving measurement accuracy. Amplifier or display converter: The function of an amplifier is to amplify and process the weak electrical pulse signal generated by the rotation of the impeller, so that it can be accurately recognized and processed by subsequent instruments or equipment. The display converter can convert the amplified signal into a flow rate value that is easy to observe and display locally, making it convenient for users to understand the gas flow rate in real time.

1. Working principle and structure of gas turbine flowmeter

2. How to install and connect a turbine

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