CN215955008U

CN215955008U - Fillet type radiating fin of radiator for oil-immersed transformer

Info

Publication number: CN215955008U
Application number: CN202122562905.6U
Authority: CN
Inventors: 虞礼辉; 钱柯恒; 王建忠
Original assignee: Changshu Youbang Radiator Co ltd
Current assignee: Changshu Youbang Radiator Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-03-04
Anticipated expiration: 2031-10-25

Abstract

The utility model provides a fillet formula fin of radiator for oil-immersed transformer, comprises two heat dissipation monolithic, and the space between two heat dissipation monolithic constitutes for the heat dissipation oil pocket, has oil feed reposition of redundant personnel portion and the mass flow portion that produces oil in the intermediate position department of the both ends tip of two heat dissipation monolithic's length direction, has a plurality of oil duct corrugated surfaces along its width direction on the heat dissipation monolithic, and two adjacent oil duct corrugated surfaces constitute and have welding baffle, characteristics: the two radiating single sheets respectively comprise an oil inlet pipe connecting part and an oil return pipe connecting part, two oppositely arranged oil inlet flow distributing parts form oil inlet flow distributing cavities, two oppositely arranged oil outlet flow collecting parts form oil outlet flow collecting cavities, two side shoulders of the oil inlet flow distributing parts are provided with oil inlet stress flow guiding areas in an arc shape, and two side shoulders of the oil outlet flow collecting parts are provided with oil outlet stress flow guiding areas in an arc shape. The heat exchange efficiency between hot oil and the radiating single sheet is improved, the integral radiating effect of the radiator is enhanced, and the burr problem in the production process is reduced.

Description

Fillet type radiating fin of radiator for oil-immersed transformer

Technical Field

The utility model belongs to the technical field of radiators, and particularly relates to a fillet type radiating fin of a radiator for an oil-immersed transformer.

Background

Along with the rapid development of economy and the rapid growth of manufacturing industry in China, the demand of each field in China for electric power is also increased year by year, the demand of power transformers is also rapidly increased, most of the existing transformers are the oil-immersed transformers, it is a new-type high-performance transformer with more reasonable structure and better performance, and uses oil as main insulating means of transformer and cooling medium of transformer, when the power transformer is run, the internal winding, the iron core and other parts generate loss, the loss is converted into heat, the heat is transferred to the oil tank wall through the heat conduction and convection action of the transformer oil, so that the temperature of the winding, the iron core, the oil tank wall and the oil surface can be continuously increased, the temperature rise directly affects the service life of insulating materials such as windings, so the temperature must be controlled within a certain range, and the adoption of a radiator for heat dissipation is an essential important component in the transformer. The finned radiator is a mainstream radiator for the existing transformer, the radiating efficiency of the finned radiator is very high, but along with the continuous increase of the power of the transformer, the heat generated by an iron core is increasingly large, so that the oil temperature of the transformer is continuously increased, and the service life of an insulating material of an iron core winding is halved every time the temperature of the transformer is increased by 6 ℃, but the cost for developing a novel radiating fin is very high, and the radiating capacity of the radiator can be generally increased only by increasing the radiating area and the production cost. The finned radiator has the advantages of simple manufacture, convenient operation, safety, reliability and the like, so that the finned radiator is widely applied to oil-immersed transformers, and each group of finned radiators in actual operation is formed by communicating a certain number of radiating fins, an oil inlet pipe and an oil outlet pipe.

The conventional radiator has a rectangular sheet structure, and the conventional radiator is provided with a plurality of oil passages for flowing transformer cooling oil, and the conventional chinese patent documents also have a lot of technical information about the radiator, which includes: CN214254057U (fins and finned radiators with unequal oil passages), CN209947613U (high-efficiency fins for finned radiators of oil-immersed transformers), CN113035516A (a uniform low-strain fin for radiators for transformers and a manufacturing method thereof), etc. however, the heat dissipation efficiency of different parts of the existing heat dissipation fins for radiators is different due to the problems of their own structure and arrangement of oil passages, which results in unbalanced oil flow inside the heat dissipation fins, especially the shoulders at both sides of the heat dissipation fins are designed in right angles, so that the oil pressure accumulation at both sides of the heat dissipation fins cannot flow well, which greatly reduces the heat dissipation efficiency of the heat dissipation fins, which results in the necessity of using multiple radiators and cooling insulating oil for transformers, increases the production cost of transformers, and is not favorable for the manufacturers to change towards the trend of high-efficiency and energy-saving products.

In view of the above, it is necessary to improve the heat sink of the conventional oil-immersed transformer. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fillet type radiating fin of a radiator for an oil-immersed transformer, which can effectively enhance the radiating capacity of the radiator and effectively improve the heat exchange efficiency of radiating oil so as to reduce the use and maintenance cost of the transformer.

The utility model aims to solve the problem that the fillet type radiating fin of the radiator for the oil-immersed transformer is formed by welding two radiating single sheets which are arranged in opposite directions and have the same shape and size through the edges, the space between the two radiating single sheets is a radiating oil cavity, an oil inlet shunting part and an oil outlet collecting part are respectively formed at the middle positions of the two end parts of the two radiating single sheets in the length direction, a plurality of oil passage corrugated surfaces are formed on the radiating single sheets in the width direction and between the oil inlet shunting part and the oil outlet collecting part, the adjacent two corrugated oil passage surfaces form welding clapboards, and the welding clapboards corresponding to the two radiating single sheets which are arranged in opposite directions are welded and fixed with each other The oil return pipe connecting part is arranged in the middle of one end of the thread surface, the two oppositely arranged oil inlet flow dividing parts form an oil inlet flow dividing cavity inside the heat dissipation oil cavity communicated with the oil inlet pipe connecting part, the two oppositely arranged oil outlet flow collecting parts form an oil outlet flow collecting cavity inside the heat dissipation oil cavity communicated with the oil return pipe connecting part, a heat dissipation oil channel area of the heat dissipation oil cavity is formed between oil channel corrugated surfaces corresponding to the two oppositely arranged heat dissipation single sheets, the heat dissipation oil channel area is communicated with the oil inlet flow dividing cavity and the oil outlet flow collecting cavity at the upper end and the lower end, oil inlet stress flow guide areas in an arc-surface shape are formed in the shoulders at the two sides of the oil inlet flow dividing part, and similarly, oil outlet stress flow guide areas in an arc-surface shape are formed in the shoulders at the two sides of the oil outlet flow collecting part.

In a specific embodiment of the present invention, the oil inlet flow-dividing portion is configured as an oil inlet flow-dividing portion inclined plate between the oil inlet pipe connecting portion and the oil inlet stress flow-guiding region, and the oil inlet stress flow-guiding region is disposed close to the oil passage corrugated surface compared to the oil inlet pipe connecting portion; the oil outlet flow collecting part is formed into an oil outlet flow collecting part inclined plate between the oil return pipe connecting part and the oil outlet stress flow guiding area, and the oil outlet stress flow guiding area is arranged close to the corrugated surface of the oil duct compared with the oil return pipe connecting part.

In another specific embodiment of the present invention, the corrugated surface of the oil passage is composed of a plurality of oil passage peaks and a plurality of oil passage valleys which are arranged in parallel along the length direction of the radiator fin.

In another specific embodiment of the present invention, the corrugated surface of the oil passage on the heat dissipating single chip is formed by pressing in a stamping or rolling manner.

In another specific embodiment of the present invention, the oil inlet pipe connecting portion and the oil return pipe connecting portion are both arc plate connecting structures.

In another specific embodiment of the present invention, the heat dissipating single sheet is made of aluminum alloy or copper.

After the structure is adopted, the utility model has the technical effects that: the oil inlet stress flow guide areas in the arc-shaped surface shapes are formed at the shoulders at the two sides of the oil inlet flow distributing part, the oil outlet stress flow guide areas in the arc-shaped surface shapes are formed at the shoulders at the two sides of the oil outlet flow collecting part, and the inclined plates of the oil inlet flow distributing part and the oil outlet flow collecting part are arranged, so that hot oil flowing into the oil inlet flow distributing cavity through the oil inlet pipe can flow into the heat dissipation oil duct areas at the two side parts in a smooth and smooth manner and in a small resistance manner, the hot oil can fully and uniformly flow into the heat dissipation oil duct areas of the heat dissipation oil cavity, the heat exchange efficiency between the hot oil and a heat dissipation single piece is improved, the integral heat dissipation effect of the radiator is effectively enhanced, and the peripheral corners of the radiating fins are round chamfers, the problem that right angles easily appear in the production process can be reduced, and sharp corners are prevented from damaging human bodies.

Drawings

Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of an embodiment of the present invention.

In the figure: 1. the oil outlet flow collecting device comprises a radiating single chip, 11 oil inlet shunting parts, 111 oil inlet stress flow guiding areas, 112 oil inlet shunting part inclined plates, 12 oil outlet flow collecting parts, 121 oil outlet stress flow guiding areas, 122 oil outlet flow collecting part inclined edges, 13 oil passage corrugated surfaces, 131 oil passage wave crests, 132 oil passage wave troughs, 14 welding partition plates, 15 oil inlet pipe connecting parts, 16 oil return pipe connecting parts; 2. and 21, a heat dissipation oil cavity and a heat dissipation oil channel area.

Detailed Description

The following is a detailed description with reference to the drawings by way of example, but the description of the example is not intended to limit the scope of the utility model, and any equivalent changes in form and material, which are made in accordance with the spirit of the utility model, are to be considered as the scope of the utility model.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, the utility model relates to a fillet type cooling fin of a radiator for an oil-immersed transformer, which is formed by welding two radiating single sheets 1 which are arranged in opposite directions and have the same shape and size through edges, a space between the two radiating single sheets 1 forms a cooling oil cavity 2, an oil inlet shunting part 11 and an oil outlet collecting part 12 are respectively formed at the middle positions of the two end parts of the two radiating single sheets 1 in the length direction, a plurality of oil passage corrugated surfaces 13 are formed on the radiating single sheets 1 along the width direction and at the position between the oil inlet shunting part 11 and the oil outlet collecting part 12, the adjacent two oil passage corrugated surfaces 13 form a welding partition plate 14, and the welding partition plates 14 corresponding to the two radiating single sheets 1 arranged in opposite directions are welded and fixed with each other.

The technical key points of the technical scheme provided by the utility model are as follows: the two radiating single sheets 1 each include an oil inlet pipe connecting portion 15 disposed at a middle position of one end of the oil inlet flow dividing portion 11 away from the oil passage corrugated surface 13 and an oil return pipe connecting portion 16 disposed at a middle position of one end of the oil outlet flow dividing portion 12 away from the oil passage corrugated surface 13, the two oppositely disposed oil inlet flow dividing portions 11 form an oil inlet flow dividing chamber inside the radiating oil chamber 2 communicated with the oil inlet pipe connecting portion 15, the two oppositely disposed oil outlet flow dividing portions 12 form an oil outlet flow dividing chamber inside the radiating oil chamber 2 communicated with the oil return pipe connecting portion 16, a radiating oil passage area 21 of the radiating oil chamber 2 is formed between the oil passage corrugated surfaces 13 corresponding to the two oppositely disposed radiating single sheets 1, the radiating oil passage area 21 is communicated with the oil inlet flow dividing chamber and the oil outlet flow dividing chamber, and oil inlet stress guiding areas 111 in an arc shape are formed at both side shoulders of the oil inlet flow dividing portion 11, similarly, oil outlet stress guiding areas 121 having an arc-shaped surface shape are formed on both sides of the oil outlet collecting portion 12.

In the present embodiment, the oil inlet flow splitting portion 11 is configured as an oil inlet flow splitting portion inclined plate 112 from between the oil inlet pipe connecting portion 15 and the oil inlet stress flow guiding region 111, and the oil inlet stress flow guiding region 111 is disposed close to the oil passage corrugated surface 13 compared with the oil inlet pipe connecting portion 15; the oil outlet collecting portion 12 is configured as an oil outlet collecting portion inclined plate 122 between the oil return pipe connecting portion 16 and the oil outlet stress guiding area 121, and the oil outlet stress guiding area 121 is disposed close to the oil passage corrugated surface 13 compared to the oil return pipe connecting portion 16.

Further, the oil passage corrugated surface 13 is composed of a plurality of oil passage crests 131 and a plurality of oil passage troughs 132 arranged in parallel along the longitudinal direction of the radiator element 1.

Preferably, the corrugated surface 13 of the oil passage on the radiating single chip 1 is formed by pressing in a stamping or rolling manner.

Further, aforementioned oil inlet pipe connecting portion 15 and oil return pipe connecting portion 16 are arc plate connecting structure, and oil inlet pipe connecting portion 13 and oil inlet pipe, oil return pipe connecting portion 16 and oil return pipe all are the laminating formula cooperation and are connected fixedly together through the welded mode, can effectively improve the bulk strength of fin, easily welding operation simultaneously.

Preferably, the whole of the heat dissipating single sheet 1 is a copper structural sheet or an aluminum alloy structural sheet. Through carrying out seam welding, shoulder welding, spot welding, circular arc welding to heat dissipation monolithic 1, guarantee that it has good leakproofness and intensity, reduce the risk of oil leak to the at utmost. The manufacturing method of the radiating fin is continuous punch forming, and has the advantages of simple manufacturing process, high production efficiency and small difficulty in purchasing raw materials.

Therefore, the fillet type radiating fin with the structure is adopted, so that the radiator for the oil-immersed transformer can contain transformer oil as much as possible for cooling, the radiating area is increased, the production efficiency is improved, the sealing performance is improved, and the product strength is improved.

Please refer to fig. 1 and fig. 2 to briefly describe the working principle of the technical solution provided by the present invention: hot oil in an oil tank of the transformer flows into an oil inlet shunting cavity between two oil inlet shunting parts 11 through the diversion of an oil inlet pipe and an oil inlet pipe connecting part 15 after the transformer operates (the connection structure of the oil inlet pipe can be referred to as a 'transformer finned radiator' disclosed by the utility model with the publication number of CN 206451573U), the hot oil fully and uniformly flows into each heat dissipation oil duct area 21 of the heat dissipation oil cavity 2 through the guiding action of the inclined plates 112 of the oil inlet shunting parts at two sides of the oil inlet pipe connecting part 15 and the oil inlet stress diversion area 111, the hot oil fully contacts and cools with the oil duct corrugated surfaces 13 of two single heat dissipation sheets 1 in the heat dissipation oil duct area 21, the temperature of the hot oil is reduced, and then the cooled hot oil flows into an oil outlet collecting cavity, then the oil flows to the oil return pipe connecting part 16 after being guided by the oil outlet stress guiding area 121 and the oil outlet collecting part inclined plate 122, and finally flows back to the inside of the oil tank of the radiator through the oil return pipe communicated with the oil return pipe connecting part 16.

In conclusion, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the utility model task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. A fillet type radiating fin of a radiator for an oil-immersed transformer is composed of two radiating single sheets (1) which are arranged in opposite directions and have the same shape and size through edge welding, a radiating oil cavity (2) is formed by a space between the two radiating single sheets (1), an oil inlet shunting part (11) and an oil outlet collecting part (12) are respectively formed at the middle positions of the end parts of the two ends of the two radiating single sheets (1) in the length direction, a plurality of oil passage corrugated surfaces (13) are formed on the radiating single sheets (1) along the width direction and between the oil inlet shunting part (11) and the oil outlet collecting part (12), and two adjacent oil passage corrugated surfaces (13) form welding partition plates (14), the welding partition plates (14) corresponding to the two radiating single sheets (1) which are arranged in opposite directions are welded and fixed with each other, and is characterized in that, the two radiating single sheets (1) respectively comprise an oil inlet pipe connecting part (15) arranged at the middle position of one end of the oil inlet flow distributing part (11) far away from the oil duct corrugated surface (13) and an oil return pipe connecting part (16) arranged at the middle position of one end of the oil outlet flow collecting part (12) far away from the oil duct corrugated surface (13), the two oppositely arranged oil inlet flow distributing parts (11) form an oil inlet flow distributing cavity inside the radiating oil cavity (2) communicated with the oil inlet pipe connecting part (15), the two oppositely arranged oil outlet flow collecting parts (12) form an oil outlet flow collecting cavity inside the radiating oil cavity (2) communicated with the oil return pipe connecting part (16), a radiating oil duct collecting area (21) of the radiating oil cavity (2) is formed between the corrugated oil duct surfaces (13) corresponding to the two oppositely arranged radiating single sheets (1), and the radiating oil duct collecting area (21) is communicated with the oil inlet flow distributing cavity and the oil outlet flow distributing cavity at the upper end and the lower end, and arc-shaped oil inlet stress guide areas (111) are formed on the shoulders on the two sides of the oil inlet flow dividing part (11), and similarly, arc-shaped oil outlet stress guide areas (121) are formed on the shoulders on the two sides of the oil outlet flow collecting part (12).

2. The fillet type cooling fin of the radiator for the oil-immersed transformer according to claim 1, wherein the oil inlet shunting part (11) is formed into an oil inlet shunting part inclined plate (112) from a position between the oil inlet pipe connecting part (15) and the oil inlet stress diversion area (111), and the oil inlet stress diversion area (111) is arranged close to the oil passage corrugated surface (13) compared with the oil inlet pipe connecting part (15); the oil outlet collecting part (12) forms an oil outlet collecting part inclined plate (122) between the oil return pipe connecting part (16) and the oil outlet stress flow guiding area (121), and the oil outlet stress flow guiding area (121) is arranged close to the oil duct corrugated surface (13) compared with the oil return pipe connecting part (16).

3. The round-corner type cooling fin of the oil-immersed transformer radiator according to claim 1, wherein the oil passage corrugated surface (13) is composed of a plurality of oil passage wave crests (131) and a plurality of oil passage wave troughs (132) which are arranged in parallel along the length direction of the radiating single sheet (1).

4. The fillet type cooling fin of the radiator for the oil-immersed transformer according to claim 1, characterized in that the oil passage corrugated surface (13) on the cooling single sheet (1) is formed by pressing in a stamping or rolling manner.

5. The fillet type cooling fin of the radiator for the oil-immersed transformer according to claim 1, wherein the oil inlet pipe connecting portion (15) and the oil return pipe connecting portion (16) are both arc plate connecting structures.

6. The fillet type heat sink of the oil-immersed transformer heat sink according to claim 1, wherein the heat sink single sheet (1) is made of aluminum alloy or copper.