SU555331A1

SU555331A1 - Eddy Current Feedthrough

Info

Publication number: SU555331A1
Application number: SU2314773A
Authority: SU
Inventors: Владлен Александрович Денисов; Владимир Александрович Шарков
Original assignee: Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им.Академика С.П.Королева
Priority date: 1976-01-20
Filing date: 1976-01-20
Publication date: 1977-04-25

Description

1one

Изобретение относитс к средствам, не измен ющим структуру объектов контрол , и может быть использовано дл контрол качества структуры прот женных движущихс электропроводных изделий круглого сечени .The invention relates to means that do not change the structure of control objects, and can be used to control the quality of the structure of extended moving electrically conductive articles of circular cross section.

Известны вихретоковые преобразователи содержащие магнитопровод, выполненный из двух ферритовых сердечников цилиндрической формы, расположенных так, что между их торцами образован кольцеобразный зазор, и обмотки, взаимодействующие с этими сердечниками Y , L2J.Known eddy current transducers containing a magnetic core made of two ferrite cylindrical cores arranged so that an annular gap is formed between their ends, and windings interacting with these cores Y, L2J.

Однако точность контрол этими преобразовател ми движущихс прот женных изделий друглого сечени недостаточна , так как указанный зазор относительно большой, что не позвол ет вы вл ть дефекты малых размеров.However, the accuracy of control by these converters of moving extended parts of another section is insufficient, since the specified gap is relatively large, which does not allow detecting defects of small sizes.

В преобразователе, вл ющемс близким по технической сущности к предложенному изобретению, магнитопровод выполнен из двух чашеобразных сердечников обращенных один к другому своими In the converter, which is close in technical essence to the proposed invention, the magnetic circuit is made of two bowl-shaped cores facing one another with its own

полост ми. Но и это не обеспечивает достаточную точность (разрешающей способности ) контрол , так как отсутствуют средства дл локализации пол электромаг нитного взаимодействи в зоне контрол 2.cavity But even this does not ensure sufficient accuracy (resolution) of the control, since there are no means for localizing the field of electromagnetic interaction in the control zone 2.

Дл повышени точности контрол качества структуры прот женных изделий круг лого сечени предлагаемый преобразователь снабжен Т - образным магнитопроводным элементом, часть которого установлена в виде оси вращени между центрами сердечников , торек другой части расположен в зазоре, а обмотки обхватывают эти части элемента.To improve the accuracy of quality control of the structure of extended products with a circular cross section, the proposed transducer is equipped with a T - shaped magnetic core element, part of which is installed as an axis of rotation between the centers of the cores, the track of the other part is located in the gap, and the windings enclose these parts of the element.

На чертеже показан эскиз предлагаемого преобрааовател .The drawing shows a sketch of the proposed converter.

Claims

It contains two ferrite cup-shaped cores 1 and 2, through holes 3 and 4 in the centers of the bottoms 5 and 6 of which the floor passes the ferrite axis 7, which is one of the first parts of the T-shaped magnetic-conductive element. A rod 8 is fixed on the axis in the center, forming with its end two gaps 9 and 10 with the end face of cores 1 and 2. On the rod 8 there is an exciting winding 11, and on the axis 7 measuring windings 12 and 13, the Converter works as follows. An excited magnetic circuit creates a field of interaction in the gap between the cores. During the rotation of the T-shaped element, the much narrower gaps 9 and 1 move along the path, determined by the ratio of the speeds of rotation of the element and the translational movement of the converter. Thus, a two-scale scanning interaction of the transducer with the controlled product is created using a large and two small gaps in the transducer, which improves the accuracy of the structuroscopy of defects with different sizes and orientations. The invention contains a vortex eddy current transducer containing a magnetic core made of two cup-shaped ferrite cores facing one another with their cavities so that an annular gap is formed between their ends, and windings interacting with these cores, characterized in that improving the accuracy of quality control of the structure of round-shaped articles, it is equipped with a T-shaped magnetic conductor element, a part of which is installed as a rotation axis between the centers of the heart Cove, another end part located in the gap, and the coil wrapped around the cell portion. Sources of information taken into account in the examination: 1. USSR author's certificate number 412543, M. Kl.S 01 N 27/86, 1971.

2. Authors svtechelstvo USSR № 494757, M. Kl.a01M 27/86, 1972 (prototype).