Structural Principles of Cone and Plate Viscometers

The cone-plate viscometer mainly consists of a flat plate and a replaceable cone rotor. The motor drives the conical rotor to rotate at a constant speed through the variable speed gear, and the appropriate amount of sample is kept on the plate and the fingertips of the rotor, and the friction between the molecules of the sample drives the cone to rotate. Under the action of the torsion spring in the torque Detector, the torsion spring no longer deforms after the rotor rotates at a certain angle. At this time, the torque applied by the torsion spring is related to the molecular internal friction (ie viscosity) of the sample to be tested: the greater the viscosity of the sample, the greater the torque. There is a variable capacitor inside the torque Detector, and its moving piece rotates with the cone plate to change its own capacitance value. The torque of the torsion spring reflected by this capacitance change is the viscosity of the sample to be tested, which is displayed by the meter, and the displayed data is the viscosity value of the sample.