CN207966707U - A kind of resin-insulated dry power transformer high-voltage coil and low-voltage coil - Google Patents

Abstract

The utility model relates to the technical field of transformer coils, in particular to a resin-insulated dry-type power transformer high and low voltage coil, which includes an iron core, the outer wall of the iron core is sleeved with a low-voltage winding barrel, and the outer wall of the low-voltage winding barrel There is a low-voltage coil, the low-voltage coil includes insulated wires, the insulated wires are wound on the low-voltage bobbin, the side of the low-voltage coil away from the low-voltage bobbin is sleeved with a resin insulating layer, and the resin insulating layer is far away from the low-voltage coil One side of the high-voltage winding barrel is covered with a high-voltage winding barrel, and the outer wall of the high-voltage winding barrel is covered with a high-voltage coil. Embedded with multiple heat dissipation fins, the high and low voltage coils of the resin insulated dry-type power transformer have changed the traditional heat dissipation method of heat dissipation air ducts, greatly increased the heat dissipation area of the resin insulation layer, and effectively enhanced the heat dissipation performance of the entire coil , to ensure that the coil can work stably.

Description

A resin insulated dry-type power transformer high and low voltage coil

technical field

The utility model relates to the technical field of transformer coils, in particular to a resin-insulated dry-type power transformer high and low voltage coil.

Background technique

There are two types of cylindrical coils: low-voltage cylindrical and high-voltage cylindrical. Low-voltage cylindrical coils are mostly used in low-voltage windings with a three-phase capacity of 630kV·A and below, and a voltage of 1kV and below; while high-voltage cylindrical coils are mostly used in three-phase capacity of 630kV·A and below, and the voltage level is 3～35kV on the high voltage winding. There are three types of cylindrical coils: single-layer, double-layer and multi-layer. The layer coil is wound on the cylinder, resulting in poor heat dissipation performance of the entire coil, making the coil work unstable.

Utility model content

The purpose of this utility model is to solve the shortcoming of insufficient heat dissipation performance of high and low voltage coils in dry-type power transformers in the prior art, and propose a resin-insulated dry-type power transformer high and low voltage coils.

In order to achieve the above object, the utility model adopts the following technical solutions:

Design a high and low voltage coil of a resin insulated dry-type power transformer, including an iron core, the outer wall of the iron core is sleeved with a low voltage bobbin, the outer wall of the low voltage bobbin is provided with a low voltage coil, and the low voltage coil includes an insulating Wire, the insulated wire is wound on the low-voltage bobbin, the side of the low-voltage coil far away from the low-voltage bobbin is covered with a resin insulating layer, and the side of the resin insulating layer far away from the low-voltage coil is sheathed with a high-voltage bobbin , the outer wall of the high-voltage bobbin is covered with a high-voltage coil, and the side of the resin insulating layer away from the low-voltage coil is covered with a heat-conducting adhesive layer. The cooling fins are located between the thermally conductive adhesive layer and the high-voltage coil, and the side of the cooling fin away from the thermally conductive adhesive layer is bonded to the high-voltage bobbin, and the outer wall of the high-voltage coil is sleeved with a moisture-proof sleeve.

Preferably, the side of the high-voltage bobbin close to the cooling fins is covered with heat-conducting glue, and the heat-dissipating fins are bonded to the high-voltage bobbin through the heat-conducting glue.

Preferably, the heat dissipation fins are ring-shaped, and a plurality of second heat dissipation holes are evenly opened on the outer wall of the heat dissipation fins.

Preferably, both ends of the iron core are sleeved with cover plates, and the outer wall of the cover plate is evenly opened with a plurality of first cooling holes.

The utility model proposes a high and low voltage coil of a resin insulated dry-type power transformer, which has the beneficial effect that a resin insulation layer, a thermally conductive adhesive layer and a heat dissipation fin are arranged between the low voltage coil and the high voltage coil, which changes the traditional heat dissipation air duct. The method greatly increases the heat dissipation area of the resin insulating layer, effectively enhances the heat dissipation performance of the entire coil, and ensures that the coil can work stably.

Description of drawings

Fig. 1 is a structural schematic diagram of a resin-insulated dry-type power transformer high and low voltage coil proposed by the utility model;

Fig. 2 is a schematic diagram of the cover plate structure of a resin-insulated dry-type power transformer high and low voltage coil proposed by the utility model;

Fig. 3 is a structural schematic diagram of the cooling fins of the high and low voltage coils of the resin insulated dry-type power transformer proposed by the utility model.

In the figure: 1 iron core, 2 cover plate, 3 moisture-proof sleeve, 4 low-voltage bobbin, 5 low-voltage coil, 6 resin insulation layer, 7 heat-conducting adhesive layer, 8 cooling fins, 9 high-voltage coil, 10 the first cooling hole , 11 second cooling holes, 12 high-voltage bobbins.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

Referring to Figures 1-3, a high and low voltage coil of a resin insulated dry-type power transformer includes an iron core 1, the outer wall of the iron core 1 is sleeved with a low voltage bobbin 4, and the outer wall of the low voltage bobbin 4 is provided with a low voltage coil 5, The low-voltage coil 5 includes insulated wires, the insulated wires are wound on the low-voltage bobbin 4, the side of the low-voltage coil 5 away from the low-voltage bobbin 4 is sleeved with a resin insulating layer 6, and the side of the resin insulating layer 6 is far away from the low-voltage coil 5 A high-voltage bobbin 12 is sleeved, and the outer wall of the high-voltage bobbin 12 is covered with a high-voltage coil 9. The side of the resin insulating layer 6 away from the low-voltage coil 5 is covered with a thermally conductive adhesive layer 7, and the outer wall of the thermally conductive adhesive layer 7 is inlaid with A plurality of heat dissipation fins 8, the plurality of heat dissipation fins 8 are located between the thermally conductive adhesive layer 7 and the high-voltage coil 9, the side of the heat dissipation fins 8 away from the thermally conductive adhesive layer 7 is bonded to the high-voltage bobbin 12, and the outer wall of the high-voltage coil 9 Socket with moisture-proof sleeve 3.

The side of the high-voltage bobbin 12 close to the heat dissipation fin 8 is covered with heat-conducting glue, and the heat-dissipating fin 8 is bonded to the high-voltage bobbin 12 through the heat-conducting glue. The heat can also be dissipated through the heat dissipation fins 8, the heat dissipation fins 8 are annular, and the outer wall of the heat dissipation fins 8 is evenly opened with a plurality of second heat dissipation holes 11, and the two ends of the iron core 1 are sleeved with cover plates 2 , the outer wall of the cover plate 2 is evenly opened with a plurality of first heat dissipation holes 10, the opened first heat dissipation holes 10 and the second heat dissipation holes 11 ensure the ventilation between the low voltage coil 5 and the high voltage coil 10, through the low voltage coil and the high voltage coil The resin insulating layer 6, the thermally conductive adhesive layer 7 and the heat dissipation fins 8 are arranged between them, which changes the traditional heat dissipation mode of the heat dissipation air duct, greatly increases the heat dissipation area of the resin insulation layer 6, and effectively enhances the heat dissipation of the entire coil performance, to ensure that the coil can work stably.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (4)

1. A resin-insulated dry-type power transformer high and low-voltage coil, comprising an iron core (1), characterized in that, the outer wall of the iron core (1) is sleeved with a low-voltage bobbin (4), and the low-voltage winding The outer wall of the barrel (4) is provided with a low-voltage coil (5). The low-voltage coil (5) includes an insulated wire, and the insulated wire is wound on the low-voltage bobbin (4). The low-voltage coil (5) is far away from the low-voltage winding One side of the cylinder (4) is sleeved with a resin insulating layer (6), and the side of the resin insulating layer (6) away from the low-voltage coil (5) is sleeved with a high-voltage bobbin (12), and the high-voltage winding The outer wall of the cylinder (12) is covered with a high-voltage coil (9), and the side of the resin insulating layer (6) away from the low-voltage coil (5) is covered with a thermally conductive adhesive layer (7), and the thermally conductive adhesive layer (7) The outer wall of the outer wall is inlaid with a plurality of heat dissipation fins (8), and the plurality of heat dissipation fins (8) are located between the heat conduction adhesive layer (7) and the high voltage coil (9), and the heat dissipation fins (8) are far away from the heat conduction adhesive One side of the layer (7) is glued to the high-voltage bobbin (12), and the outer wall of the high-voltage coil (9) is sleeved with a moisture-proof sleeve (3). 2. A resin-insulated dry-type power transformer high and low voltage coil according to claim 1, characterized in that the side of the high voltage bobbin (12) close to the cooling fins (8) is covered with thermally conductive glue, The heat dissipation fins (8) are bonded to the high-voltage bobbin (12) through heat-conducting glue. 3. A resin-insulated dry-type power transformer high and low voltage coil according to claim 1, characterized in that, the heat dissipation fin (8) is annular, and the outer wall of the heat dissipation fin (8) is evenly opened with A plurality of second cooling holes (11). 4. A resin-insulated dry-type power transformer high and low voltage coil according to claim 1, characterized in that, both ends of the iron core (1) are sleeved with a cover plate (2), and the cover plate ( 2) The outer wall is evenly opened with a plurality of first cooling holes (10).