SU920467A1 - Viscometer - Google Patents

Description

(54) VISKOSIMETER

one

The invention relates to a measurement technique and can be used to monitor and measure the viscosity of liquids at high temperatures and pressures.

A viscometer is known, which contains a cone vessel with the liquid to be examined, a rotating cone unit and a linear actuator for moving the rotating unit. The gap between the inner walls and the rotating unit at a constant power of the rotating unit determines the viscosity of the fluid to be followed 1.

This viscometer has low reliability.

The closest to the proposed technical essence and the tasks to be solved is a viscometer containing a vessel with the test liquid, which is fixed on the lower end of the axis, which is vertically hardened. The axis is made in the form of a thin elastic wire. If the vessel is informed by sharp oscillations, then the logarithmic damping factor and the period of natural oscillations correspond to the viscosity of the studied liquid 2.

The disadvantages of the viscometer are low measurement accuracy due to the dependence of the measured values on the parameters of the elastic wire, as well as the complexity of operation of the device.

The aim of the invention is to increase the measurement accuracy and simplify the operation of the device.

Claims (2)

This goal is achieved by the fact that a viscometer containing a cylindrical vessel for the test liquid, fixed on the axis, and a recording system additionally contains two injection discs mounted on a common shaft, on the outer generatrix of which two permanent magnets are rigidly fixed, the cylindrical vessel is additionally provided with a partition, coaxial its side surface, two magnet-shaped soft poles with adjacent sections of the measuring winding, a magnet mounted on a rod with pointed ends, the axis is made in the form of a hollow rigid shaft, the upper end of which is mounted in the support, while the permanent magnets are rotated 180 ° relative to each other, non-magnetic disks are located under magnetically poles, the pointed ends of the rod rest in the center of the end surfaces of the cylindrical vessel, magnetically poles attached to the partition, and between them is a magnet mounted on a rod with pointed ends. FIG. 1 shows the viscometer design; in fig. 2 - section of the vessel. The viscometer contains a vessel 1, made in the form of an annular chamber with the bases O, QZ- The camera is fixed on the lower end of the axis 2, mounted vertically in the base 3 on the bearing 4, it is filled with the test liquid 5. Inside it are oppositely mounted and rigidly connected to The camera magnet has soft poles 6 and 7. Between the poles 6 and 7, a magnet 8 is freely positioned with a rod with pointed ends mounted in the upper and lower ends of the vessel. In the gaps between the magnet and the soft poles 6, 7 and the poles of the magnet 8 are located sections 9 and 10 of the measuring winding. Under the chamber 1, nonmagnetic disks 12 and 13 are rigidly mounted on the shaft 11. A first permanent magnet 14 is rigidly mounted on the outer part of the nonmagnetic disk 12. A second permanent magnet 15 is fixedly mounted on the outer forming nonmagnetic disk 13. The leads from the measuring winding are passed through a cylindrical hole axis 2. The first and second permanent magnets 14 and 15 are rotated 180 ° with respect to each other, and the nonmagnetic disks 12 and 13 are mounted in the planes below the magnetic poles 6 and 7, respectively. Shaft 11 is rotated with omoschyu engine 16. The upper part of the axle 2 is mounted a permanent magnet 17, a pole is mounted th magnitoupravl emye sealed contacts 18 and 19. The operating principles of the viscometer is as follows. When the shaft And rotates at one of the time points under the magnet with a flexible pole 6, the first permanent magnet 14 of the non-magnetic disk 12 passes. The interaction of the soft pole 6 with the magnet of the first constant 14 causes the rotation of the vessel 1 in the direction of rotation of the metal pole 6. In time, the first permanent magnet 14 goes down, and the second permanent magnet 15 of the non-magnetic disk 13 rises up. The interaction of the magnet of the soft pole 7 and the second permanent magnet 15 causes the vessel 1 to turn in opposite directions y in relation to the first turn. Thus, the rotational movement of the non-magnetic disks 12 and 13 is converted into the oscillatory movement of the vessel 1. At the same time, the oscillation frequency of the vessel I is measured by reed switches 18 and 19, whose contacts periodically close under the influence of the floor from the oscillating together with the vessel 1 of the permanent magnet 17. At the same time, due to the placement of the magnet 8, the latter does not have time to move synchronously with the magnetic poles 6 and 7, opposite which is set when there is no oscillation. As a result, sections 9 and 10 of the measuring winding induced electromotive force. Selecting the frequency of rotation of the shaft 11 of the engine 16 corresponding to the natural oscillation frequency of the vessel I achieve the greatest amplitudes of the oscillations of the vessel 1. At the same time, the EMF at the output of the measuring winding sections will be greatest. The technical and economic effect of the present invention is to improve the measurement accuracy compared to the known one, due to the fact that in this viscometer the measurement results do not depend on the parameters of the elastic suspension. In addition, with some complication of vessel design, the operation of the device is greatly simplified. The invention The viscometer containing a cylindrical vessel for the test liquid fixed on the axis and a recording system, characterized in that, in order to improve measurement accuracy and simplify operation of the device, it additionally contains two non-magnetic disks mounted on a common shaft, on the outer generatrix of which two permanent magnets are fixed, the cylindrical vessel is additionally provided with a partition, coaxial to its side surface, with two magnetically soft poles with a section adjacent to them and measuring winding, with a magnet mounted on a rod with pointed ends, the axis is made in the form of a hollow rigid yale, the upper end of which is installed in the bearing, while the permanent magnets are turned 180 ° relative to each other, the nonmagnetic disks are located under the magnet with soft poles, pointed the ends of the rod rest in the center of the end surfaces of the cylindrical vessel, magnetically soft poles are attached to the partition, and between them there is a magnet mounted on the rod with pointed ends. Sources of information taken into account in the examination 1. USSR author's certificate number 696349, cl. G 01 N 11/14, 1979. 2.Grauvel J.M., Kestin J. Working Equations for the oscillating-cup viscometer “Appl. Sci. Res. 1978, 34, № 4, 427-443 (prototype).