CN217562356U

CN217562356U - Transformer of two heat dissipation forms

Info

Publication number: CN217562356U
Application number: CN202221115824.XU
Authority: CN
Inventors: 李凯锋; 朴海峰; 杨海涛; 那晋豪; 张博聪
Original assignee: Tianjin Aviation Mechanical and Electrical Co Ltd
Current assignee: Tianjin Aviation Mechanical and Electrical Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-11
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to an electrical power source transform belongs to the electrical safety field, concretely relates to transformer of two heat dissipation forms. Comprises a transformer, an upper cold plate (5), 2 pressure plates (6), 4 pillars (7), 2 magnetic core brackets (8) and a lower cold plate (9); the transformer is a liquid cooling heat dissipation form, and when the liquid cooling heat dissipation is invalid, the power output of more than half load can be provided through air cooling heat dissipation. The utility model discloses a heat dissipation scheme chooses for use two cold plate forms, presss from both sides the transformer with upper and lower cold plate in the centre. A liquid cooling flow channel is arranged in the double cold plates, a multi-flow-channel parallel connection mode is formed in the winding due to the design of the reinforcing ribs, and the current disturbing columns are densely distributed at the positions, which are in contact with the transformer winding, so that the conduction efficiency of the cold plates is increased. The surface of the upper cooling plate is provided with radiating fins, so that the radiating capacity under the condition of cooling loss is improved.

Description

Transformer of two heat dissipation forms

Technical Field

The utility model relates to an electrical power source transform belongs to the electrical safety field, concretely relates to transformer of two heat dissipation forms.

Background

With the proposal of the concept of multi-electric airplane, the number of the on-board electronic devices is increased, the electrification degree is increased, and the load number and the power level of the direct current device are increased. In order to meet the heat dissipation requirement of a high-power supply conversion product, a liquid cooling heat dissipation mode can be used for improving the heat dissipation efficiency. Considering the redundancy of the heat dissipation system, the heat dissipation system can still meet the requirement of half-load power output of the multi-pulse-wave transformer under the condition that liquid cooling fails, and the heat dissipation design in a double heat dissipation mode is provided with higher requirements.

The liquid-cooled radiating transformer is usually in an oil immersion type, has the advantages of good radiating effect, uniform heat distribution and the like, and can solve the problems of high-capacity radiation and high-voltage insulation of the transformer. However, the transformer oil is flammable, and may be burned and exploded when meeting flames, and the transformer oil needs to be checked regularly, and from the aspects of safety, maintainability and the like, the oil-immersed liquid cooling heat dissipation method is not suitable for heat dissipation of the aviation transformer.

The air-cooled radiating transformer usually adopts a fan radiating mode, and in order to increase the radiating area of the transformer, an air channel is usually arranged in the middle of a transformer winding, so that different layers of windings are overhead, thereby increasing the air flow between the windings and further reducing the internal temperature of the winding. The air-cooled heat dissipation structure is simple, the air-cooled heat dissipation effect is good, the conduction efficiency between windings is reduced while the air-cooled heat dissipation efficiency is improved, and the air-cooled heat dissipation structure is not suitable for a liquid-cooled heat dissipation mode depending on conduction heat dissipation.

Disclosure of Invention

The utility model aims at providing a design with two heat dissipation forms for the transformer product, be a two cold plate heat radiation structure to solve the heat dissipation problem that liquid cooling heat dissipation and liquid cooling became invalid.

The purpose of the utility model can be realized through the following technical scheme:

a transformer with double heat dissipation forms comprises a transformer, an upper cold plate 5, 2 pressure plates 6, 4

pillars

7, 2 magnetic core brackets 8 and a lower cold plate 9; the upper cold plate 5 is connected with the lower cold plate 9 through two metal corrugated pipes 10; the transformer is clamped and fixed by the upper cold plate 5 and the lower cold plate 9 through 4 pillars 7, and the transformer magnetic core 1 is fixed by the magnetic core bracket 8 and the pressing plate 6; the magnetic core support 8 is provided with a groove with the same shape as the magnetic core 1, the magnetic core 1 is arranged in the groove, and the contact surface of the groove and the magnetic core 1 is coated with heat conducting gel. Providing a good heat conduction path for the core to the cold plate.

The transformer comprises a magnetic core 1, a first winding 2, a second winding 3 and a third winding 4; the first winding 2, the second winding 3 and the third winding 4 are sleeved on the magnetic core 1, and the magnetic core 1 is fixed through a packing belt.

Go up cold board 5 and be the box structure, the box internal flow channel is the combination form of guide plate group and vortex post group, and 3 regions are divided into to the vortex post group, and wherein first vortex post group 12 corresponds 2 positions of first winding, and second vortex post group 13 corresponds 3 positions of second winding, and third vortex post group 14 corresponds 4 positions of third winding, and a plurality of radiating fin of upper portion distribution of box. The turbulence columns improve the heat dissipation and conduction efficiency of the winding and the cold plate.

And heat conducting gel is coated on the contact surfaces of the first winding 2, the second winding 3 and the third winding 4 with the upper cold plate 5 and the lower cold plate 9.

Each strut 7 is connected to the upper cold plate 5 by an upper nut, which is a mounting nut, and a lower nut, which is a service nut.

The turbulence columns of each set of turbulence columns are arranged in a staggered mode, and the turbulence columns are of a diamond structure.

The guide plates in the upper cooling plate 5 are arranged in parallel along the direction of the flow channel, and a turbulence column group is arranged between the two groups of guide plates.

Has the advantages that:

the utility model discloses a transformer with two heat dissipation forms chooses for use two cold plate structures, through the vortex post design at the winding corresponding position, has optimized the heat-conduction route between winding, cold plate and the fin of cold plate, has solved the problem that liquid cooling and forced air cooling heat dissipation design scheme contradicted mutually, has realized the heat dissipation design under two kinds of operating modes of liquid cooling and liquid cooling inefficacy, has improved the heat dissipation redundancy of product to the reliability of product has been improved.

Drawings

FIG. 1 is a front view of a dual heat dissipation version of a transformer assembly;

FIG. 2 is a right side view of a dual heat rejection version transformer assembly;

FIG. 3 is a flow diagram of an upper cold plate.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

In this embodiment, referring to fig. 1-3, the transformer with double heat dissipation forms of the present invention includes a transformer, a cold plate, and a magnetic core bracket.

Referring to fig. 1, an upper cold plate 5, 2 pressing plates 6, 4 supporting

columns

7, 2 magnetic core brackets 8 and a lower cold plate 9; go up cold drawing 5 and lower cold drawing 9 and press from both sides the transformer tight fixedly through 4 pillars 7, the magnetic core of transformer 1 is fixed by magnetic core support 8 and clamp plate 6. The transformer comprises a magnetic core 1, a first winding 2, a second winding 3 and a third winding 4; the first winding 2, the second winding 3 and the third winding 4 are sleeved on the magnetic core 1, and the magnetic core 1 is fixed through a packing belt.

Referring to fig. 2, the upper cold plate 5 is connected with the lower cold plate 9 through two metal bellows 10; the metal bellows may provide tolerance compensation for the transformer. The problem of traditional tubular metal resonator bend radius big, space utilization is low is solved.

And heat conducting gel is coated on the contact surfaces of the first winding 2, the second winding 3 and the third winding 4 with the upper cold plate 5 and the lower cold plate 9. The magnetic core support 8 is provided with a groove with the same shape as the magnetic core 1, the magnetic core 1 is arranged in the groove, and the contact surface of the groove and the magnetic core 1 is coated with heat conducting gel. The heat conducting gel fills gaps among the magnetic core, the winding and the cold plate, so that the contact thermal resistance of the transformer is reduced, and a good heat conduction path is provided for the magnetic core to the cold plate.

Each strut 7 is connected to the upper cold plate 5 by an upper nut, which is a mounting nut, and a lower nut, which is a maintenance nut. Since the gap between the transformer winding and the cold plate is already filled with the heat conducting gel, the viscous force of the heat conducting gel can cause the upper cold plate to be difficult to remove when being disassembled for maintenance. The disassembly of the upper cold plate can be realized by screwing the lower nuts of the 4 pillars.

Referring to fig. 3, the upper cooling plate 5 is a box structure, the flow channel inside the box is a combination of a flow guide plate group and a flow disturbing column group, the flow disturbing column group is divided into 3 regions, wherein the first flow disturbing column group 12 corresponds to the position of the first winding 2, the second flow disturbing column group 13 corresponds to the position of the second winding 3, the third flow disturbing column group 14 corresponds to the position of the third winding 4, and a plurality of heat dissipation fins are distributed on the upper portion of the box. The turbulence columns improve the heat dissipation and conduction efficiency of the winding and the cold plate. The transformer conducts heat to the upper cold plate radiating fins through the turbulence columns, and the air-cooled radiating effect is improved.

The turbulence columns of each set of turbulence columns are arranged in a staggered mode, and the turbulence columns are of a diamond structure. The guide plates in the upper cooling plate 5 are arranged in parallel along the direction of the flow channel, and a turbulence column group is arranged between the two groups of guide plates. The side of the upper cooling plate 5 is provided with a water inlet 15 and a water outlet 11, the internal flow channel is designed in a U shape, the flow equalization is realized through the guide plate and the turbulence column, the characteristics of small flow resistance and good heat conduction effect are achieved, and the liquid cooling heat dissipation effect is improved.

Claims

1. A transformer with double heat dissipation forms is characterized by comprising a transformer, an upper cold plate (5), 2 pressure plates (6), 4 pillars (7), 2 magnetic core brackets (8) and a lower cold plate (9); the upper cold plate (5) is connected with the lower cold plate (9) through two metal corrugated pipes (10); the transformer is clamped and fixed by the upper cold plate (5) and the lower cold plate (9) through 4 pillars (7), and the magnetic core (1) of the transformer is fixed by a magnetic core bracket (8) and a pressure plate (6); the magnetic core support (8) is provided with a groove with the same shape as the magnetic core (1), the magnetic core (1) is arranged in the groove, and the contact surface of the groove and the magnetic core (1) is coated with heat conduction gel.

2. A transformer in the form of a double heat sink according to claim 1, characterized in that it comprises a magnetic core (1), a first winding (2), a second winding (3), a third winding (4); the first winding (2), the second winding (3) and the third winding (4) are sleeved on the magnetic core (1), and the magnetic core (1) is fixed through a packing belt.

3. The transformer of claim 2, wherein the upper cold plate (5) is of a box structure, the flow channel inside the box is of a combination of a flow guide plate group and a flow disturbing column group, the flow disturbing column group is divided into 3 regions, a first flow disturbing column group (12) corresponds to the position of the first winding (2), a second flow disturbing column group (13) corresponds to the position of the second winding (3), a third flow disturbing column group (14) corresponds to the position of the third winding (4), and a plurality of heat dissipation fins are distributed on the upper portion of the box.

4. A transformer in the form of double heat dissipation according to claim 2, characterized in that the contact surfaces of the first winding (2), the second winding (3), the third winding (4) and the upper cold plate (5) and the lower cold plate (9) are coated with a heat conducting gel.

5. A transformer in the form of a double heat sink according to claim 1, characterised in that each leg (7) is connected to the upper cold plate (5) by means of an upper nut and a lower nut, wherein the upper nut is a mounting nut and the lower nut is a service nut.

6. The transformer of claim 3, wherein the turbulence columns of each set of turbulence columns are staggered, and the turbulence columns are in a diamond structure.

7. A transformer with double heat dissipation forms as in claim 2, wherein the flow deflectors in the upper cold plate (5) are arranged in parallel along the flow channel direction, and a flow-disturbing column group is arranged between two groups of flow deflectors.