SU1744723A1 - Induction apparatus - Google Patents

Abstract

Use: electrical engineering, power transformers or reactors, shunts on the tank. SUMMARY OF THE INVENTION: The device comprises an active part 1 and a tank 2 with a connector 3. The wall 4 of the upper part of the tank and the wall 5 of the lower part of the tank in the area of the connector are displaced relative to each other in the horizontal plane. Horizontal shunts 7 are placed on the wall of the tank 5 protruding outwards, vertical shunts 6 - on the wall of the tank, serving inside. Vertical shunts overlap in the area of the connector horizontal shunts 7. All shunts are fixed on the tank wall with a pressure device. 5 il. cl

Description

The invention relates to electrical engineering, in particular to the production of high-power power transformers.

An induction apparatus is known, for example, a transformer containing an active part installed in a tank, which has upper and lower parts separated by a connector. A magnetic screen is installed on the tank wall, consisting of a series of vertical shunts located in the upper part upwards from the connector and coaxially with them - in the lower part down from the tank connector, and under the ends of the shunts installed copper bus, the ends of which are electrically connected to the tank.

A disadvantage of the known construction is the presence of gaps in the zone of the tank connector between the vertical shunts in the upper and lower parts of the tank. The magnetic flux from the shunts bulges into the wall of the tank and due to this, eddy currents arise in it, which cause heating and losses reaching cases of large values exceeding normalized values, and the presence of a copper bus under the ends of vertical shunts practically does not change the magnetic flux on the surface of the tank.

The closest to the present invention is an induction apparatus, for example, a transformer containing an active part installed in a tank, which is divided into upper and lower parts by a flange connector. On the inner surfaces of the tank walls there are packages of horizontal and vertical shunts. The horizontal package of shunts is made of magnetic material and is installed opposite the gap between the upper and lower vertical shunts so that the vertical shunts and the horizontal package form a magnetic screen that overlaps the tank connector.

However, the known device has a number of disadvantages: the presence of gaps between the upper and lower vertical shunts; at the points of transition from vertical shunts to horizontal magnetic flux direction does not coincide with the direction of rolling in horizontal shunts; the presence of angles (protrusions) directed inside the transformer. All this leads to the disturbance of the magnetic coupling between the shunt packages, the distortion of the electric field, the occurrence of eddy currents and, ultimately, the overestimation of electric power losses in the tank walls. In addition, the construction of the famous transformer is low-tech, since when installing the upper part of the tank on the bottom in

As a result of the lack of access to the location of the shunt packages in the connector area, it is impossible to control the mutual position of the shunts, i.e. provide

specified overlap and gaps. This disadvantage, apparently, predetermined the fact that the known device did not find application in transformer construction.

The aim of the invention is to reduce

energy losses and ensuring the technological design of the induction apparatus, mainly transformer.

The goal is achieved by the fact that

in an induction apparatus, mainly a transformer, containing an active part installed in a tank, which is divided by a flange connector into the upper and lower parts and provided on the inside

the surface of the walls of packages of horizontal and vertical shunts that overlap the connector, the walls of the upper and lower parts of the tank in the area of the connector are offset one relative to another in the horizontal plane,

horizontal shunts are placed on the wall of a part of the tank protruding inwards so that vertical shunts overlap the horizontal shunts, and in the overlap zone all the shunts are fixed on the inner wall of the tank protruding outwards.

FIG. 1 shows schematically the active part and the transformer tank with shunt packages mounted on its walls; in fig. 2 is a view A of FIG. 1 (location

shunts); in fig. 3 shows the node t in FIG. 1 (shunt fastening to the tank wall); in fig. 4 and 5 - options for installing shunts in the ledge formed by the displacement of the walls.

The induction apparatus, preferably a transformer, contains an active part 1 located in the tank 2, which is divided by a flange connector 3 into the upper 4 and lower 5 parts.

On the inner surfaces of the walls of the upper 4 and lower 5 parts of the tank 2, packages of vertical 6 and horizontal 7 shunts are installed, overlapping connector 3 Packages of horizontal shunts 7 are inserted into

a ledge 8 formed by the displacement of the walls of the tank 2 (FIGS. 1, 4, 5). FIG. 1, for example, the ledge is formed by the displacement of the walls of the upper 4 and lower 5 parts of the tank 2 at the place of their connector; in fig. 4 and 5 show other options.

The horizontal shunts 7 are covered with packages of vertical shunts 6, which are mounted on the surface of the wall protruding inside the tank 2, for example on the wall of the upper part 4. Vertical shunts 6 are fixed (pressed) on the outside of the tank 2 on the wall protruding outwards, for example on the lower part 5 .

The shunt attachment unit (Fig. 3) is a clamping device in the form of a clamp 9, consisting of a screw 10, passing through a hole in the wall of the tank 2, and a clamp 11, covering the clamping part 12, made in the form of a pipe, film etc. The described shunt attachment design allows them to be fixed from the outside and released when the upper part of the tank is removed.

The proposed induction apparatus is assembled in the following sequence;

- install vertical shunts 6 on the wall of the upper part 4 of the tank 2, and horizontal shunts 7 - on the wall of the lower part 5;

- install the active part 1 of the transformer in the lower part of the tank;

- install shunt attachment elements 9, 12 with a gap (between the pressing part 12 and horizontal shunts 7), sufficient to displace the ends of the vertical shunts 6 into the tank when the upper part of the tank is seated on the bottom;

- install the upper part of the tank on the lower, while the vertical shunts 6 overlap the connector 3 and lie on the horizontal shunts 7;

-control the relative position of shunts 6 and 7 through inspection hatches on the tank;

- tighten the shunts by selecting the gap with the help of the screw 10 and the collar 11, which encloses the clamping part 12;

- final control through the inspection hatches for proper assembly and fastening.

Induction apparatus operates as follows.

The magnetic flux generated by the windings and taps of the active part of the apparatus hits the surface of horizontal 7 and vertical 6 shunts installed on the upper 4 and lower 5 parts

tank 2. Due to the low magnetic resistance, the shunts channel the magnetic flux in the directions of the magnetic field strength. Part of the stream is channeled by horizontal shunts between the rods or phases of the transformer, the other part of the stream is channeled by vertical shunts between the upper and lower parts of the windings. The absence of air gaps in vertical shunts in the vicinity of the connector and the presence of horizontal shunts in this zone can significantly reduce tank losses from eddy currents caused by a magnetic field and, accordingly, reduce heating.

Thus, the invention makes it possible to provide reliable magnetic coupling between shunt packages in an induction apparatus and thereby reduce electric power losses in it, as well as to ensure manufacturability of the design by reliably joining shunts in place of the connector and then fixing them outside the tank

Claims (1)

Induction apparatus, preferably a transformer, containing an active part installed in a tank, which is divided into upper and lower parts by a flange connector and provided with inner and vertical shunts on the inner surface of the walls, overlapping the connector, characterized in that and ensuring the manufacturability of the design, the walls of the upper and lower parts of the tank in the connector area are displaced relative to each other in the horizontal plane, the horizontal shunts of the mescheny on the wall of the tank, projecting outwards and vertical shunts placed on the wall of the tank, an inwardly so that vertical, horizontal overlap shunts shunts, wherein in the overlap area all shunts are secured on the inner tank wall, projecting outwards.