SU616561A1

SU616561A1 - Rotary viscosimeter

Info

Publication number: SU616561A1
Application number: SU772456556A
Authority: SU
Inventors: Виталий Павлович Кузнецов; Владислав Федорович Поддубный
Original assignee: Ростовский-на-Дону научно-исследовательский институт технологии машиностроения
Priority date: 1977-01-12
Filing date: 1977-01-12
Publication date: 1978-07-25

Description

(54) РОТАЦИОННЫЙ ВИСКОЗИМЕТР(54) ROTATIONAL VISCOSIMETER

Изобретение относитс к приборостроению , в частности к устройствам дл определени в зкости текучих сред, и может быть использовано преимущественно дл определени в зкости лакокрасочных материалов .The invention relates to instrumentation, in particular, to devices for determining the viscosity of fluids, and can be used primarily to determine the viscosity of paints and varnishes.

Известен ротационный вискозиметр, содержащий коаксиально расположенные неподвижный наружный и приводной внутренний цилиндры, датчик ротационный, электронный блок и феррорезонансный стабилизатор .Known rotational viscometer containing coaxially located stationary outer and drive inner cylinders, rotary sensor, electronic unit and ferroresonant stabilizer.

Недостатками такого вискозиметра вл ютс сложность его конструкции и низка надежность, ограниченна возможность его применени .The disadvantages of such a viscometer are the complexity of its design and low reliability, the limited possibility of its use.

Наиболее близок к предлагаемому изобретению ротационный вискозиметр, содержащий коаксиальные внутренний и наружный цилиндры, BHJ гренний из которых соединен с приводом, а наружный - с измерителем момента измерительной системы.Closest to the proposed invention is a rotational viscometer containing coaxial inner and outer cylinders, the BHJs of which are connected to the drive, and the outer one with a measuring device moment meter.

Измеритель момента выполнен в виде двухступенчатого гироскопа, корпус которого соединен с измерительным цилиндромThe torque meter is made in the form of a two-stage gyroscope, the body of which is connected to the measuring cylinder

Входна ось гироскопа совмещена с осью вращени измерительного цилиндра, а на выходной оси гироскопа установлен дат чик угла, ротор которого электрически св зан с компенсирующим двигателем, который св зан с вало.м измерительного цилиндра.The input axis of the gyroscope is aligned with the axis of rotation of the measuring cylinder, and an angle sensor is installed on the output axis of the gyroscope, the rotor of which is electrically connected to the compensating motor, which is connected to the shaft of the measuring cylinder.

Включением приводного двигател передают вращение внутреннему цилиндру вискозиметра. При этом измерительный цилиндр вращаетс под действнем сил трени жидкости о стенки цилиндров.By turning on the drive motor, the rotation is transmitted to the internal cylinder of the viscometer. In this case, the measuring cylinder rotates under the action of the force of friction of the liquid against the cylinder walls.

Углова скорость, передаваема от измерительного цилиндра на входную ось гироскопа, разворачивает выходную ось. гироскопа на угол, пропорциональный в зкости испытуемой жидкости. При этом датчик угла посылает сигнал рассогласовани гироскопа на компенсирующий двигатель .The angular velocity transmitted from the measuring cylinder to the input axis of the gyroscope, turns the output axis. gyroscope angle proportional to the viscosity of the test liquid. At the same time, the angle sensor sends the gyro mismatch signal to the compensating motor.

Claims

However, in such a viscometer measure. The torque moment is an electrical circuit that includes a gyroscope, an angle sensor, an amplifier and a compensating motor, which in explosive devices; ov1хх, for example, in paint shops, is a danger during operation. The purpose of the invention is to ensure the reliability of operation in explosive conditions. This is achieved by the fact that in a rotadion viscometer, the moment meter is made as attached to the inner surface of the outer cylinder in its upper part of the toothed segments, which engage with the toothed crown of the sleeve on the drive shaft with the ability to move along its axis, with this second crown of the sleeve is made in the form of a damper measuring system such as a nozzle-damper. The proposed design of the torque meter allows you to compare the viscosity of the medium with the flow rate of air coming from the throttles to the end of the flap through the change of the gap between them, and, by the same token, ensures the reliable operation of the viscometer in explosive atmospheres. The absence of electrical units in the viscometer circuit simplifies its design. The drawing shows the proposed rotational viscose "tr. Rotational viscometer contains coaxial bushes 1 and 2, respectively, internal and external. The cylinder 1 is connected by a shaft 3 with an air motor 4 equipped with a 5-speed regulator. Measuring cylinder 2 is provided with a torque measuring device containing two gear segments 6 fixed to cylinder 2 and interacting with gear tooth 7 of valve 8 mounted on the threaded part of shaft 3. A pneumatic throttle nozzle 9 is mounted above the end of valve 8 with a gap air line 10 is attached to the pneumatic system. At the hub of the cylinder 1, there is a fixed bolt 11, the free end of which is attached to the wall of the cylinder 2, intended to compensate for the misalignment angle of the rotating cylinders 1 and

2. The spring 11 is set so that its torque is equivalent to the moment of resistance of the viscosity of the reference fluid. Rotational viscometer works as follows. By turning on the air motor 4. the rotation is transmitted to the internal cylinder 1 of the viscometer. In this case, the measuring cylinder 2 rotates under the action of the elastic force of the misalignment angle compensator 11. Under the action of the force of the friction fluid against the cylinder walls, the cylinder 2 rotates in the direction opposite to the direction of its rotation by an angle proportional to the viscosity to be changed. Further, the movement is transmitted through the gear segments 6 to the gear rim 7 and the flap 8, which, turning on the threaded part of the shaft 3, changes the clearance of the pneumatic seat. In this case, the pneumatic viscosity signal through the duct 1O enters the pneumatic viscous control and regulation circuit. Claims of the invention A rotary viscometer containing coaxial inner and outer cylinders, inner of which is connected to the drive, and outer one with a measuring system moment meter, characterized in that, c. In order to ensure the reliability of the explosive conditions of the OS, the moment meter is implemented in the fixed condition (on the inner surface of the outer cylinder in its upper part of the gear segments, which are engaged with the gear ring of the sleeve, mounted on the drive shaft with the possibility of movement along its axis, while the second the crown of the sleeve is made in the form of a damper measuring system type nozzle-damper.

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