The working principle of the elliptical gear flowmeter is that the liquid pushes a pair of elliptical gears to rotate; The volume of each cavity is a fixed volume; The gear speed is introduced, and the sensor emits synchronous pulse counting. The rotation of the elliptical gear is transmitted to the counter through a magnetic sealed coupling and transmission reduction mechanism, directly indicating the total amount flowing through the flowmeter. If an additional transmitting device is added, coupled with an electrical display instrument, remote transmission of only instantaneous or cumulative flow can be achieved.

The working principle of the elliptical gear flowmeter is that the measuring part of the elliptical gear flowmeter is mainly composed of two meshing elliptical gears and their housing (measuring chamber), as shown in the following figure:

 Working principle diagram of elliptical gear flowmeter

Flow measurement is independent of the flow state of the fluid, as the elliptical gear flowmeter relies on the pressure head of the measured medium to drive the elliptical gear to rotate for measurement. The higher the viscosity of the medium, the smaller the amount of leakage from the gear and measuring space gap. Therefore, the larger the viscosity of the measured medium, the smaller the leakage error, and the more advantageous it is for measurement. The elliptical gear flowmeter has high measurement accuracy and is suitable for measuring the flow rate of high viscosity media, but it is not suitable for fluids containing solid particles (solid particles can jam the gear, making it impossible to measure the flow rate). If gas is mixed in the measured liquid medium, it can also cause measurement errors. Elliptical gear flowmeter is a type of volumetric flowmeter used for precise continuous or intermittent measurement of liquid flow or instantaneous flow in pipelines. It is particularly suitable for flow measurement of high viscosity media such as heavy oil, polyvinyl alcohol, resin, etc.

Product features:

1. High measurement accuracy, wide flow range, and good repeatability;

2. Spiral rotor rotates uniformly, with minimal vibration and long lifespan;

3. Not sensitive to changes in viscosity of the measured liquid, especially suitable for measuring liquids with high viscosity;

4. Simple structure and small external dimensions;

5. Easy to install, no need to install straight pipe sections in front of the meter;

Typical applications:

The elliptical gear flowmeter is mainly used to measure high viscosity media, and the product is widely used in industries such as petroleum, petrochemical, natural gas, chemical, paper, etc., for measuring small flow rates of small pipe diameters. 

Main advantages:

1. Caliber ranging from 10-200mm;

2. There are various materials to choose from for the shell: cast iron, cast steel, stainless steel, etc;

3. There are various bearing materials to choose from: cast iron, cast steel, stainless steel, etc;

4. Material of the shaft: cast steel, stainless steel;

5. The materials for O-rings include VITON, fluororubber, stainless steel, and Teflon for selection;

6. Range ratio 10:1;

7. Accuracy is ± 0.5%, 0.2%, and repeatability is ± 0.03%;

8. The highest viscosity can reach 3000CP;

9. The maximum pressure level can reach 6.4MPa;

10. The maximum temperature resistance level can reach -20~280 ℃.