『Flowmeter Atlas』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
1. Types and principles of flow meters
1. Working principle of orifice flowmeter: When the fluid fills the pipeline and flows through the throttling device inside the pipeline, the flow beam will experience local contraction, resulting in an increase in flow velocity and low static pressure. Therefore, a pressure drop, or pressure difference, is generated before and after the throttling element. The larger the flow rate of the medium, the greater the pressure difference generated before and after the throttling element. Therefore, orifice flowmeter can measure the size of fluid flow by measuring the pressure difference. This measurement method is based on the laws of energy conservation and flow continuity.
2、 Working principle of electromagnetic flowmeter: based on Faradays law of electromagnetic induction. In an electromagnetic flowmeter, the conductive medium inside the measuring tube is equivalent to a conductive metal rod in the Faraday test. The two electromagnetic coils at the upper and lower ends generate a constant magnetic field. When a conductive medium flows through, an induced voltage is generated. The induced voltage generated by measuring the two electrodes inside the pipeline. The measuring pipeline achieves electromagnetic isolation from the fluid and measuring electrodes through non-conductive lining (rubber, Teflon, etc.).
3、 Working principle of Venturi flowmeter: When fluid passes through the flowmeter, a certain pressure difference will be generated between the inlet and outlet of the flowmeter The rotating component of the flowmeter (referred to as the rotor) rotates under this pressure difference and discharges the flow hammer from the inlet to the outlet During thi
4、 Working principle of volumetric flowmeter: When fluid passes through the flowmeter, a certain pressure difference will be generated between the inlet and outlet of the flowmeter The rotating component of the flowmeter (referred to as the rotor) 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 measuring 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.
5、 Working principle of waist wheel flowmeter: When fluid passes through the flowmeter, it is affected by the differential pressure between the inlet and outlet fluids of the flowmeter The two waist wheels will rotate in the direction of attacking the imperial bridge. The liquid in the measuring chamber keeps flowing in and out, and the fluid flow rate can be calculated by knowing the volume of the disassembled measuring chamber and the number of rotations of the waist wheel.
2. How to represent mass flowmeter in CAD
Mass flowmeter in CAD: The volume of the fluid in the mass flowmeter is a function of the fluid temperature and pressure, and is a
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