SU1096706A1 - Transformer - Google Patents

Abstract

TRANSFORMER, predominantly intrinsically safe, containing magnes located in the tank. A conduit with windings mounted on its rods with a cooling system by means of heat pipes, the evaporation part of which is integrated into the lower collector, characterized in that it is equipped with a cooler located outside the tank , the windings are made of hollow conductor, the winding sections being connected to the upper and lower headers made of insulating material, the upper header connecting n with a cooler, and the cooler lower part - with the lower header.

Description

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The invention relates to the field of electrical engineering, in particular, to transformer construction, and can be used in the development of high-power transformers of various purposes, including explosion-proof dry ones.

A transformer is known in which a cooling intensification system is used, which operates on the principle of heat pipe. In the active part of the transformer, cooling elements in the form of heat pipes are installed, whose heat receiving parts are in contact through the insulation layer with 5 copper windings and are located at a height of 2 / 3 of their heights in the zones of greatest heat, and the heat-release parts protrude beyond the windings and / are washed by air inside the shell 11. 20

In this cooling system, heat released in the windings by heat conduction is transferred to heat pipes, further through pipes due to the evaporation-condensation process and from heat pipes to the shell only due to natural convection of internal air. However, in the last section, heat is removed

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A transformer is known which contains magnetic circuits located in a tank with windings mounted on its rods with a cooling system in the form of heat pipes. To increase the cooling efficiency, the heat pipe condensers, which are in contact with the acting part, are made in the form of hollow ribs and sealed outside the casing. The evaporators and condensers 40 in this system for the purpose of refueling the heat pipes are combined respectively by manifolds, which are connected to the buffer element 2 j via inserts.

The disadvantage of this transformer is the relatively low efficiency of its cooling due to the significant thermal resistance at the points of contact of the heat pipes with the windings, as well as the insufficient heat transfer inside the heat pipes themselves due to the lack of constructive measures for the separation of liquid and vapor phases. heat carrier.

In addition, the system is non-technological in manufacturing, since a significant amount of separate sealed

edges, when assembling it is difficult to seal the internal cavity of the transformer, when welding burns are possible, as the ribs and rits.

The aim of the invention is to increase the cooling efficiency.

The goal is achieved by the fact that a transformer, predominantly explosive, containing magnetic circuits located in a tank with windings mounted on its rods with a cooling system by means of heat pipes, the evaporation part of which is integrated into the lower collector, is equipped with a cooler located outside the tank, the windings are filled from a hollow conductor, the winding sections are connected to the upper and lower headers made of insulating material, the upper header is connected to the cooler, and the lower part is cooled - with the lower collector.

Figure 1 presents the proposed transformer; figure 2 is a view of And figure 1; fig.Z - node I in figure 1, the section of the windings.

The proposed transformer has the following design. In the casing 1 an active part 2 is placed. The transformer disk windings are made in the form of sections 3 wound with a hollow conductor of circular or rectangular cross section. Each section 3 (a certain number of turns) has upper fittings 4 made of an insulating material, for example, fluoroplastic, to which upper collectors 5 are attached, branch pipes 6 are attached to them. At the bottom of sections 3 there are poor fitting 7, to which are attached the lower collectors 8 and the pipes 9 to them. The pipes 6 and 9 through the openings in the cover of the casing 1 exit to the outside and communicate with the cooler 10 installed on the cover, with the pipe 9 connected to the bottom of the cooler. Thus, the cavity windings 3 from above through fittings 4, collectors 5 and nozzles 6 communicate with cooler 10, cooler 10 in turn through nozzles 9, collectors 8, fittings 7 are connected to the bottom of the windings-sections 3. The whole system is sealed and inside sections filled with a cooling agent, for example, freon.

The device works as follows.

Claims (1)

A TRANSFORMER, mainly explosion-proof, containing a magnetic circuit located in the tank with windings mounted on its rods with a cooling system by means of heat pipes, the evaporation part of which is integrated into the lower collector, characterized in that, in order to increase cooling efficiency, it is equipped with a cooler located outside the tank , the windings are made of a hollow conductor, and sections of the windings are connected to the upper and lower collectors made of insulating material, the upper collector is connected to the cool rer, and the lower part of the cooler - with the lower collector.