TH68043B - Real-time viscosity measurement device while stirring - Google Patents

Abstract

This invention real-time stirring viscosity device is characterized by the absence of a torque sensor which is a key component of any existing viscosity measurement device. shaft by equipping a set of cooling pipes with shaft sleeve and cartridge The climbing ball is assembled in the same set. which does not increase the friction to the rotation system from the drain heating with coolant because the coolant will not come in direct contact with the shaft The propeller is used suitable for mixing The impeller is coated with a heat-resistant and corrosion-resistant material, and the stirring viscosity value is displayed in real time with the power factor from the current measurement. and the pressure drop of a servo DC electric motor at a constant rotation speed, which is a condition in which the viscosity of the liquid varies with the power of the motor that drives the stirring blades.

Claims (6)

All rights reserved, which will not appear on the advertisement page: 1. A real-time viscosity measurement device for agitated liquids, consisting of a vertical slide assembly (20) with a ruler (21) for measuring distance mounted on one part and a mounting base (19) on a portion of the vertical slide assembly, characterized by one end of the mounting base connected to a cooling assembly consisting of a cooling pipe (16), a shaft sleeve (3) and ball bearings (4), (5), wherein the cooling pipe (16) is a cylindrical tube enclosing the shaft sleeve (3), with the upper and lower ends of the shaft sleeve being fitted with ball bearings (4) and (5), respectively. The cooling pipe (16), enclosing the shaft sleeve (3), creates an internal cavity, which is open to the outside through openings (17) and (18). These openings serve as inlets and outlets for coolant used to cool the shaft (2). The coolant does not directly contact the shaft, but dissipates heat through the bearings (4) and (5) to the shaft sleeve. One end of the shaft (2) is connected to the impeller (1), which is coated with heat-resistant and corrosion-resistant material. The other end of the shaft is connected to the servo motor (6) shaft by a coupling (7). The motor has an encoder (22) assembled in it, which is connected to the control box (23) by electric cables (24). The control box is used to receive and display the measurement values, as well as transmit the measurement results to the computer screen (25) by signal cables (26). The servo motor (6) is mounted on the motor base (8). Screws (9), (10), (11), and (12) support the motor base (8) and connect it to the shaft base (13). The four set screws also adjust the distance and plane of the motor. To align the axles of the shaft (2) and the motor shaft (6), the motor base (8) and the shaft base (13) are plates with holes in the center for the shaft (2) and the motor shaft (6), and holes at the four corners for the screws (9), (10), (11), and (12). A sleeve (14) is welded to the underside of the shaft base (13) for fitting onto the shaft sleeve (3), and is fixed to the shaft sleeve with a worm screw (15). 2. A real-time agitated liquid viscosity measuring device according to claim 1, wherein the impeller (1) is replaceable. 3. A real-time agitated liquid viscosity measuring device according to claim 1, wherein the viscosity measurement and agitator of a low-temperature liquid can be used without turning on the coolant. 4. A real-time agitation liquid viscosity measuring device according to claim 1, wherein the absolute viscosity of the liquid can be measured by calibrating the measurement result with a known liquid viscosity at the same test conditions. 5. A real-time agitated liquid viscosity measuring device according to claim 1, wherein the impeller immersion distance in the liquid that minimizes mixing time is in the range of 0.3 - 0.4 and at a high impeller rotational speed. 6. A real-time agitated liquid viscosity measuring device according to claim 1, wherein the motor speed control to rotate at a constant rotational speed is achieved by means of pulse width modulation.