SU1241102A1 - Rotary viscometer - Google Patents

Abstract

A rotational viscometer is described using two selsyns, a selsyn-sensor and a selsyn-receiver, a synchronous motor with a nozzle and an indicator, in which the power-receiving device is made in the form of two permanent magnets mounted on shafts of selsyns capable of angular and axial displacement The device is placed in the general case. Such a design makes it possible to increase the accuracy and sensitivity of measurements. . 1 il. Yu

Description

The invention relates to a technique where continuous automatic control of the viscosity of a process filter is required, for example, in the production of varnishes, resins, artificial fibers, paper, various slurries, and suspensions. .

The purpose of the invention is to increase the reliability of the viscometer, improve measurement accuracy and increase sensitivity.

The drawing shows a diagram of the rotational viscometer.

The rotational viscometer includes a synchronous motor 1 articulated with a shaft of a selsyn-dan. 2, a selsyn-receiver 3, a nozzle permanent magnets 5 mounted on the free ends of the shafts of a selsyn. The synchronization windings of the selsyn-sensor and the selsyn-receiver are interconnected by electrical wires according to the indicator circuit. The sensor and the sensor receiver are fixed in the common case 6 with the possibility of angular and axial movement, relative to each other, the indicator 7 is connected to the communication line between the selsyns.

Rotational viscometer works as follows. I The electric motor 1 transmits rotation to a sensor 2, which, by flux coupling in the gap between the magnets 5, transmits the rotation to the receiver 3 and the nozzle 4, which rotates in air. In this case, all the rotating parts of the viscometer have the same angular velocity equal to the angular velocity of the synchronous motor. When adjusting the viscometer to a specific viscosity measurement range, a moment is created artificially at the nozzle, approximately equal to the moment corresponding to the lower limit of the viscosity change. For this, the nozzle is immersed in a controlled environment with a predetermined

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241102 J

minimal viscosity. Then, turning the selsyns relative to each other, reduce the current in the communication line to its lowest value. After this, moving the axes in the axial direction, the minimum value of the current in the communication line is reduced to a minimum. Thus, the mismatch angle is set to zero and the friction in the bearings is reduced. Viscometer ready for operation.

As the viscosity of the controlled medium increases, the mismatch angle between the rotors of the selsyn-sensor and the selsyn-receiver increases, and, accordingly, the angle of the mismatch increases the current in the communication line. With a decrease in the viscosity of the controlled medium, the mismatch angle between the selsyn rotors and the current in the communication line decreases.

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Formula of the invention

A rotational viscometer including a synchronous motor, a selsyn sensor, a selsyn receiver connected by an indicator circuit, a power receiving device, a nozzle and an indicator included in the communication line between the selsyns, characterized in that, in order to improve the reliability of the viscometer To increase the measurement accuracy and sensitivity, the force-response device is made in the form of two permanent magnets mounted on the shafts of the selsyn-sensor and the selsyn-receiver, their magnetic axes are perpendicular to the axis in selsina- synchro transmitter and receiver, wherein the synchro secured within a common housing with the possibility of angular and axial movement relative to each other, and the synchronous motor and head are fixed to the free ends of the shafts of the encoder and the synchro receiver.

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Editor K. Voloshchuk

Compiled by V. Voshankin

Tehred M. Mrgrental Proofreader T. Kolb

Order 3480/37 Circulation 778

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Subscription

Claims (1)

Claim A rotational viscometer including a synchronous motor, a selsyn sensor, a selsyn receiver connected by an indicator circuit, a power sensing device, a nozzle and an indicator included in the communication line between the selsyn, characterized in that. In order to increase the reliability of the viscometer, improve accuracy measurement and sensitivity, the power sensing device is made in the form of two permanent magnets mounted on the shafts of the selsyn sensor and selsyn receiver, their magnetic axes are perpendicular to the axes of the shafts lynosinducer and synchro-receiver, while the synchro are fixed in a common housing with the possibility of angular and axial movement relative to each other, and the synchronous motor and nozzle are fixed on the free ends of the shaft synchro-sensor and synchro-receiver. Editor K. Voloshchuk Compiled by V. Voshankin Tehred M. Morgenthal Corrector T. Kolb Order 3480/37 Circulation 778 Subscription VNIIIPI of the State Committee of the USSR for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4