TACHOMETRIC FLOW METER (VERSIONS) Russian patent published in 2014 - IPC G01F1/10 

FIELD: instrumentation.

SUBSTANCE: tachometric flow meter contains a flow-through body with a central axial channel and a coaxial ring measurement channel and a unit for control of the sensor element rotation. Positioned inside the measurement channel are the input and the output guiding apparatus in the form of plugs with blades between which a ring groove for the sensor element rotation is made. The input guiding apparatus has straight radial blades that transform into helical blades downstream while the output guiding apparatus has helical blades that transform into straight radial blades downstream. The ring groove is limited in the radial direction with the body inner wall and the plug outer wall and in the axial direction - with the rings installed at the interfacing butt ends of the input and the output guiding apparatus.

EFFECT: improving accuracy of measurement of flow rate of liquids with variable density and viscosity within a wide supply range.

15 cl, 3 dwg