SU821970A1

SU821970A1 - Magnetoelastic torque transducer

Info

Publication number: SU821970A1
Application number: SU792776241A
Authority: SU
Inventors: Александр Ефимович Дубинин
Original assignee: Куйбышевский Институт Инженеров Же-Лезнодорожного Транспорта
Priority date: 1979-06-07
Filing date: 1979-06-07
Publication date: 1981-04-15

Description

1one

Изобретение относитс к силоизмерительной технике и может быть использовано дл измерени крут щего момента.The invention relates to load measuring technique and can be used to measure torque.

Известный электромагнитный торсиометр , содержащий упругий ферромагнитный вал и два П-образных электромагнита , расположенных под пр мым углом один к другому и Ориентированных в направлени х возбуждаемых в валу положительных и отрицательных механических напр жений 1 .The known electromagnetic torsometer, containing an elastic ferromagnetic shaft and two U-shaped electromagnets, located at a right angle to each other and oriented in the directions of positive and negative mechanical stresses in the shaft, 1.

рднако данный торсиометр не обеспечивает требуемой чувствительностии точности измерени .However, this torsometer does not provide the required sensitivity and accuracy of measurement.

Наиболее близким по технической сущности и достигаемому результату к предложенному вл етс магнитоупругий преобразователь крут щего . момента, содержащий упругий ферромагнитный вал, неподвижную кольцевую электромагнитную систему, магнитопроводы которой расположены под углом 45 к оси вала и под углом 90 друг к другу, и мостовую измерительную схему .The closest in technical essence and the achieved result to the proposed one is a magnetoelastic torsional transducer. moment, containing an elastic ferromagnetic shaft, a stationary ring electromagnetic system, the magnetic cores of which are located at an angle of 45 to the axis of the shaft and at an angle of 90 to each other, and a pavement measuring circuit.

Недостатком такого преобразовател вл етс низка чувствительность и точность измерени ,а также большиThe disadvantage of such a converter is low sensitivity and measurement accuracy, as well as greater

габариты и сложность установки преобразовател на вгш.dimensions and complexity of installation of the converter on the vshsh.

Цель изобретени - повышение чувствительности и точности измерени , уменьшение габаритов и упрощение установки преобразовател .The purpose of the invention is to increase the sensitivity and accuracy of measurement, reduce the size and simplify the installation of the converter.

Указанна цель достигаетс тем, что в .преобразователе магнитопроводы выполнены в виду полуколец, в This goal is achieved by the fact that in the converter the magnetic circuits are made in the form of half-rings, in

0 пазах которых уложены петлевые обмотки , причем плоскости полуколец образуют пр моугольную систему, а обмотки полуколец, плоскости которых параллельны друг другу, включены0 grooves of which are laid loop windings, and the planes of semirings form a rectangular system, and the windings of semirings, the planes of which are parallel to each other, are included

5 в противоположные плечи мостовой измерительной схемы.5 into the opposite shoulders of the bridge measuring circuit.

Принципиальна схема преобразовател представлена на чертеже.A schematic diagram of the converter is shown in the drawing.

Магнитоупругий преобразователь крут щего момента содержит упругий The magnetoelastic torque converter contains an elastic

Claims

0 ferromagnetic shaft 1 and a stationary ring electromagnetic system, four of which are inclined magnetic cores 2-5 of which are made in the form of half-rings made of electrical sheet steel. An xcd of four semiring magnetic conduits covers half of the shaft. All the planes of the semiring magnetic cores are located at an angle of 45 to the axis of the shaft and at an angle of 90 each to the other, the rectangular system. This system is fixed in case b, made of two halves, in bearings of which shaft 1 is located. The windings 7, 9 and 8, 10 of the semiannual magnet 2.4 and 3.5, arranged parallel to each other, are included on the opposite shoulders of a bridge-measuring circuit fed by voltage and. In order to eliminate the mutual influence, the magnetic cores are separated from each other by non-magnetic shims 11. The magnetoelastic torque converter, of the moment, works as follows. In the absence of torque (M 0) and the shaft is completely isotropic, the measuring circuit is balanced by a signal or output equal to zero. When a torque () is applied to the ferromagnetic shaft 1, compression and tension stresses arise on its surface, directed at an angle of 45 to the axis of the shaft and at an angle of 90 to each other. Under the action of tensile stresses, the magnetic permeability of the shaft in this direction increases, and under the action of compressive stresses in the perpendicular direction, it decreases. This leads to an increase in the inductive and respectively impedance o6M current of one parallel semi-ring magnetic conductor and to a decrease in the inductive and impedance windings of the other parallel semi-circular magnetic conductor. As a result of the anisotropy of the shaft, the resistances of the shoulders of the bridge change and, at the output of P o, the voltage is proportional to the torque. When the sign of the moment on the reverse signal changes and / 2 at the output of the measuring circuit also changes its sign. The use of semiring magnetic conduits forming a rectangular system increases the sensitivity and accuracy of the magnetoelastic torque converter, as well as reduces its dimensions and simplifies installation on the shaft. Claims of Invention A magnetoelastic torque converter containing an elastic ferromagnetic shaft, a stationary ring electromagnetic system whose magnetic conductors are at an angle of 45 ° to the axis of the shaft and at an angle of 90 ° to each other, and a pavement measuring circuit, TL and h. so that, in order to increase the sensitivity and accuracy of measurement, reduce the size and simplify the installation of the converter, the magnetic circuits in it are made in the form of half-rings in which loop windings are laid,; moreover, the planes of semirings form a rectangular system, and the windings of semirings, the planes of which are parallel to each other, are included in the opposite shoulders of the bridge measuring circuit. Sources of information taken into account in the examination 1. USSR author's certificate number 112899, cl. G 01 L 3/10. . .

2. Forward number 2601228 / 18-10 (052439), 04/10/78 (prototype).