Volumetric flowmeter | Types and principles of flowmeters | Nanning ultrasonic flowmeter manufacturer

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What does volumetric flow mean?

Volume flow rate refers to the volume of gas discharged by an air compressor per unit time at the required exhaust pressure, converted to the intake state. Volume flow rate is commonly referred to as exhaust volume by domestic users. Usually, with a large displacement, the energy released by the engine per unit time (i.e. converting the chemical energy of the fuel into mechanical energy) is high, which means it has good "power performance". Its like a teenage boy having higher efficiency in physical labor compared to a healthy adult. So those off-road vehicles and sports cars usually have relatively large displacements. The working volume through which the piston moves from top dead center to bottom dead center is called the cylinder displacement; The engine has several cylinders, and the sum of the working volumes of all cylinders is called the engine displacement. Usually expressed in liters (L). Engine displacement is one of the most important structural parameters, which represents the size of the engine more accurately than cylinder diameter and number of cylinders. Many indicators of the engine are closely related to exhaust volume. The working principle of the expanded bulk flow meter is that when a fluid passes through the flow meter, a certain pressure difference is generated between the inlet and outlet of the flow meter. The rotating component (referred to as the rotor) of the flow meter rotates under this pressure difference and discharges the fluid from the inlet to the outlet. During this process, the fluid repeatedly fills the "measuring space" of the flowmeter and is then continuously sent to the outlet. Under the given flow meter conditions, the volume of the m

easuring space is determined. As long as the number of rotations of the rotor is measured, the cumulative value of the fluid volume passing through the flow meter can be obtained. Volumetric flow meters can be classified according to their measuring components, including elliptical gear flow meters, scraper flow meters, dual rotor flow meters, rotary piston flow meters, reciprocating piston flow meters, disc flow meters, liquid sealed rotary cylinder flow meters, wet gas meters, and membrane gas meters. Advantages of volumetric flow meters: high measurement accuracy, installation pipeline conditions have no impact on measurement accuracy, can be used for measuring high viscosity liquids, wide range, direct reading instruments can directly obtain cumulative and total quantities without external energy, clear and easy to operate. Disadvantages of volumetric flow meters: The complex structure results in high weight and cost, making them unsuitable for liquids with foreign objects and low viscosity (above 1CP), bearings are prone to wear and require regular inspection, installation is cumbersome and labor-intensive, and their competitiveness is relatively low in medium and large diameters. Volumetric flow meters, differential pressure flow meters, and float flow meters are among the three most widely used types of flow meters, commonly used for measuring the total amount of expensive media such as oil and natural gas. Reference material: Baidu Baike - Displacement reference material: Baidu Baike - Volumetric flowmeter

2. Types and principles of flow meters

The types and principles of flow meters are as follows: Flow meter type: Volumetric flow meter: also known as fixed displacement flow meter, uses mechanical

Volumetric flowmeter | Types and principles of flowmeters

What does volumetric flow mean?

2. Types and principles of flow meters

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