SU705310A1 - Microviscometer - Google Patents

Description

(54) MICROVISCOMETER

one

This invention relates to devices for measuring the viscosity of Newtonian and Structured 6s.

A viscometer is known to determine the viscosity of a structural fluid from the magnitude of the torque of the viscometric body associated with the electric motor, which discharges the electrical charge of the capacitor G1. In this instrument, viscosity is determined from the angle of rotation of the motor shaft. When a capacitor is discharged onto an electric motor, its shaft turns with a continuously decreasing velocity gradient. The angle of rotation of the shaft is measured on a scale graded in units of viscosity. In the viscometer, between; the angle of rotation of the shaft and the viscosity measured is inversely proportional to the relationship.

However, this viscometer has a low measurement accuracy due to the lack of friction under the brushes-rotor of the electric motor and an increase in friction, as the speed of rotation of the rotor and discharge of the capacitor decrease. The measurement accuracy decreases with increasing viscosity of the liquid under study, due to the inversely proportional dependence of viscosity on the angle of rotation of the motor shaft, as well as due to the presence of a nonlinear scale that Osc is shown nonlinearly. The law of capacitor decay when discharging to an inductive n1T is narrow, which is represented by the stator and rotor coils of an electric motor. In addition, the well-known viscometer is complex - a sonstructive / - which is caused by the need to use a device for charging a capacitor, which ensures a certain charge setting.

A portable viscometer for liquid media is known, containing a receiving cylinder. On the axis of which the working spring is fixed,

disk with a lock, stopwatch located at the top of the building. 2.

The well-known viscometer is also not

5 provides sufficient measurement accuracy. ,;

The purpose of the invention is to improve the accuracy of measurements in the rapid analysis. This is achieved by the fact that in the viscometer the start button of the stopwatch is connected coaxially with the rod to the stop in contact with the disk, and one of the ends of the spring is fixed on the device body ..

The drawing shows schematically the proposed microviscometer. Cylinder 1 is immersed in a beaker 2 with the test liquid. The axis 3 of the tsipindra I is connected to a spring 4, the other end of which is fixed on the housing 5 and has an index disk b in the upper part, on which the fixer 7 is fastened. A time meter has a stopwatch located above the index disk 6.

Before measuring, cylinder 1 is rotated one revolution around axis 3. As a result, spring 4 and clamp 7 are cocked, engages with stop 9 on

T he 10, associated with the start, button And stopwatch 8.

When measuring simultaneously with a stopwatch bunch of 8 tons ha 10 with the stop 9, it releases the disk with Lock 7. As a result, the spring 4 begins to unfold. Cylinder 1 in liquid.

When cylinder 1 rotates at an angle of 33-0, a combination of the risks on the indicator disc b and the arrow occurs

. 12u placed on the housing 5 of the device. At the time of their combination, pressing the button produces a stopwatch counting 8. By the time the cylinder rotates in the liquid, the viscosity of the liquid under investigation is divided. S -.;.:. . V In the microscopic meter, between the time of cylinder rotation and the viscosity of the liquid under investigation, there is a right-angle if it is not normal.

t-cylinder rotation time

Where

liquids

Kj is a constant coefficient depending on the stiffness

springs and geometry of cylinders;

V is the viscosity of the liquid under study.

In the microviscometer, the scale of the measuring device, the stopwatch device is linear over the entire range of variable viscosity values. In the working angle of rotation of the sensing cylinder 0-330 ° in the device, a linear relationship is provided between the angle of rotation and the torque of the spring.

The instrument provides a viscosity measurement in the range of 5 sp. Up to 1000 pauses with a measurement accuracy not xu. 5 + 2%, the weight of the device is

-300-350 g.

The micro-visco gauge is intended for use in conditions where

There are no electrical sources of energy. When measuring viscosity

The device is placed in the hand of the operator.

Formula of Invention

Microviscometer containing perceiving cylinder, on the axis of which the operating spring, disk is fixed

0 with a latch, a stopwatch located in the upper part of the instrument case, in order to improve the accuracy of measurements, the start-up button of the stopwatch is aligned with the stop in contact with the discs, and One of the ends of the spring is fixed on the device body.

Sources of information taken into account in the examination

1. USSR author's certificate 297905, cl. G 01 N 11/14, 1969. 2. USSR Copyright Certificate №232594, cl. G 01 N 11/12, -1968 (about: otip).

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