Rotational viscosity measuring device and method for measuring viscosity

Abstract

The invention discloses a rotational viscosity measuring device and a viscosity measuring method thereof. The rotational viscosity measuring device comprises a windshield, a motor, a rotating shaft, a metal hanging wire, a connecting piece, two rotating pieces and two proximity switches. The rotating shaft, the metal hanging wire and the connecting piece are sequentially connected to the output shaft of the motor, and a damping oil container is arranged on the rotating shaft or between the rotating shaft and the metal hanging wire, and a damping oil container is arranged between the damping oil container and the connecting piece At least two damping rods; one end of the damping rod is fixed on the side of the connecting piece, and the other end is provided with a damping sheet, and the damping sheet is suspended in the damping oil container. This method applies the above-mentioned device, by measuring the time difference between the damping oil container and the measuring head rotating stably in the air, and the time difference between the damping oil container and the measuring head rotating stably in the melt, and then according to the difference between the two speed differences, the melt the viscosity. The invention has the characteristics of fast synchronization speed of the measuring head and high precision of measurement results.

Description

technical field [0001] The invention relates to a viscosity measuring device, in particular to a rotational viscosity measuring device and a viscosity measuring method thereof. Background technique [0002] Growing crystals from melts is an important crystal growth method, and many important crystals are grown by this method. Viscosity, as an important physical quantity of fluid, has an important influence on the process of crystal growth in the melt. Viscosity directly affects the transportation of solute, doping and impurities in the melt. Knowing the viscosity of the melt can also provide a basis for improving the transportation of doping and impurities and exploring the suitable growth conditions for growing high-quality crystals; viscosity It is also the basic parameter of the fluid control equation and the basic parameter for studying the law of fluid motion. [0003] The rotation method is the most commonly used method for measuring the viscosity of high temperature...

AI Technical Summary

Problems solved by technology

Since the speed difference is determined by the torsion angle of the thin iron wire, the swing of the measuring rod and the probe during the experiment will affect the accuracy of the experiment, and when the motor just rotates, the inertial probe does not rotate at that moment Yes, it is necessary to rely on the thin iron wire to rotate at a relatively large angle to drive the measuring rod and measuring head to rotate. The viscosity test can only be carried out until the speed of the measuring rod and measuring head is synchronized with the speed of the motor. The process of waiting for the synchronization is very long and affects The efficiency of the experiment is improved. At the same time, because the hanging wire is often twisted at a large angle, its torsional performance is easy to change, resulting in inaccurate viscosity measurement data.

Images