The liquid mass flow meter consists of a metering box and a pair of elliptical gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gears, it is not sealed as a calculation unit for a displacement. When When the measured liquid enters the flowmeter through the pipe, the pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the displacement is the total amount of the measured liquid flow.
Therefore, it is not difficult to find from the measurement principle of the liquid mass flow meter that it relies on the pressure head of the measured medium to push the elliptical gear to rotate for measurement, and has nothing to do with the fluid flow state.
When the liquid mass flow meter is used to measure a liquid with high viscosity, the leakage amount from the gear and the measurement gap is less. Therefore, the greater the viscosity of the liquid to be measured, the smaller the leakage error, which is more beneficial to the measurement. The accuracy will be higher. It can be said that the liquid mass flow meter is the choice for measuring the flow of high viscosity liquids.
Here, I want to remind users that for fluids with solid particles, liquid mass flow meters should not be used, because solid particles will jam the gears, resulting in the inability to measure the flow; also note that for liquids For gaseous media, it is also not recommended to use liquid mass flow meters, as the measurement error will be quite large.