METHOD TO DETERMINE LIQUID VISCOSITY Russian patent published in 2016 - IPC G01N11/14 

FIELD: measurement equipment.

SUBSTANCE: method to measure liquid viscosity by a rotary viscosimeter includes the creation and measurement of pressure differences in injection and suction chambers of a rotary pump, measurement of the rotor rotation speed, with the subsequent detection of the sought for parameter by calculations. At the same time the measurements are carried out in a dynamic mode, and additionally they measure the torque at the pump driving shaft, the temperature at the outlet of the pump, then they calculate the viscosity of the controlled liquid according to the following formulas: , , where: A, F, G - permanent coefficients; Δp - pressure difference in the injection and suction chambers; n - speed of the rotor rotation; t - temperature at the pump outlet; M_dr - torque spent at the pump driving shaft; t₀ - reduced temperature. It is reasonable to use a rotor-rotary pump as the rotary pump.

EFFECT: simplified method and increased reliability.

2 cl, 1 dwg