CN215118557U - Radiating fin of radiator for transformer - Google Patents

Abstract

The utility model discloses a fin of radiator for transformer, its fin is behind two heat dissipation monolithic pairs, and peripheral laminating department and middle part laminating department welding are constituteed, and its heat dissipation monolithic includes: the heat dissipation single chip is mainly characterized in that a plurality of peak-shaped diversion guide wave crests protruding from an oil side to an air side and valley-shaped seepage disturbance wave troughs recessed from the oil side to the air side are arranged on the oil channel of the heat dissipation single chip; when the radiator works, a plurality of shunting guide wave crests of the radiating fin form a gas-side mixed disturbance flow field, and a plurality of mixed disturbance wave troughs form an oil-side mixed disturbance flow field; the radiating fins are provided with air side mixed flow fields, and are adjacently arranged at a certain fin interval to form inter-fin air side mixed flow fields; the radiator made of the radiating fins with the characteristics can enable the inner part and the outer part of the radiating fins to form a mixed flow state under the ONAN condition, and simultaneously enable fluids in an oil side mixed flow field and a gas side mixed flow field of the radiating fins to be mixed and disturbed, thereby playing a role in strengthening heat transfer.

Description

Radiating fin of radiator for transformer

Technical Field

The utility model relates to a technical field is made in the processing of radiator for the transformer, provides a fin of radiator for transformer very much.

Background

The oil immersed transformer and the reactor in operation generate certain energy loss in components such as windings, iron cores and the like, and the energy loss is converted into heat energy. Only a small part of this heat energy is transferred to the tank wall and dissipated into the air by means of heat conduction and heat convection through the transformer. Most of heat energy can not be quickly and effectively dissipated through the oil tank flat wall structure of the transformer, the temperature rise of transformer oil is directly improved, and the insulation life of the transformer oil is further shortened, so that other more effective heat dissipation measures have to be considered to solve the heat dissipation problem of the oil-immersed transformer. Through practice and development of nearly half a century, the finned radiator has become a mainstream measure for solving the heat dissipation problem of the oil-immersed transformer and the reactor. Especially, the method is widely applied to low-noise products mainly including ONAN. At present, the radiating fin structure of the finned radiator for the transformer, which is common in the industry, is that a plurality of longitudinal single oil ducts are not communicated with each other, and the liquid phase and the gas phase inside and outside the radiating fin cannot be effectively mixed and disturbed. Based on the above structure and technical reasons, the total heat transfer coefficient K of the finned radiator is low, and therefore, in order to meet the heat dissipation requirement, a large number of fin groups are often required to be configured or an ONAF or OFAF cooling mode is often adopted. For example, a large transformer 67MVA/500KV needs to select a scattered sheet PC2800-28/520(32) group to meet the heat dissipation requirement, and the structural size of the heat dissipation sheet group occupies a larger transverse space of the transformer, and the cost is higher, so that the space occupation and the cost are larger. Consequently, at not increasing radiator material cost or reducing its material cost, simultaneously under the passive operating mode, make transformer finned radiator's fin have logical chamber oil duct, realize that inside and outside liquid phase of fin, gaseous phase object obtain constantly mixing and the disturbance becomes the necessary condition that improves its effective heat-sinking capability, the utility model discloses with the above-mentioned technical bottleneck of effectual solution.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fin of radiator for transformer. The plate of the radiating fin for the radiator is a steel or aluminum plate, the plate is driven by a power system and a supporting mechanical structure to form a gas side diversion guide crest shape and an oil side mixing disturbance trough shape of a radiating single sheet by a paired roller die rolling method, then the radiating single sheet of a diversion channel and a confluence channel part which correspond to an oil channel and are in transition connection is formed by a stamping rolling system by using a flat plate, and the plate is transmitted to the stations by a plate conveying system to complete the radiating fin rolling process. Reach then the utility model discloses the fin improves by a wide margin than the heat-sinking capability of current fin, has realized reducing the effect of radiator group number or piece number for the transformer to reduce the radiator and occupy the horizontal space around the transformer tank, reduce the oil mass for the transformer simultaneously, reduced transformer manufacturing cost, and can reduce fan quantity simultaneously under fan cooling (ONAF) condition.

The utility model designs the peak-shaped diversion guide wave crest outside the radiating fin on the premise of leading the medium to flow mainly by means of density difference and position difference, so that the air side of the radiator forms a segmented guide turbulent flow from bottom to top; in the process of outward heat dissipation of the air side surface, the heat dissipation airflow on the surface of the heat dissipation fin can rise from the lower part to the upper part to dissipate heat in a superposed state, and in this case, the surface of the upper heat dissipation fin can be influenced by the hot airflow from the lower part of the heat dissipation fin while dissipating heat; the heat-conducting airflow in each segment can generate the effect of separating from the surface of the air side of the radiator between two diversion guide wave crests in the longitudinal direction, thereby avoiding the temperature superposition formed by the hot airflow on the surface of the radiating fin from the surface to the bottom and improving the radiating efficiency, each radiating segment can radiate under the same condition of approaching the ambient temperature, reducing the phenomenon that the upper ambient temperature is higher than the lower ambient temperature caused by the temperature superposition, and the diversion guide wave crests in the air side mixed flow field transversely disturb all the airflow of the oil flow radiating surface, so that the disturbance effect can be exerted to the maximum, under the diversion guide effect of the diversion guide wave crests on the rising surface airflow, the distance between the sheets is more than 45mm in the practical application according to JB/T5347 < specification of transformer finned radiator >, because the adjacent radiating fins are close to each other, the air side shunting guide wave crests of the plurality of radiating fins under the condition of the distance can enable air flows between the air sides of the adjacent radiating fins to generate mutual interference to form an air side mixed interference flow field between the radiating fins, and the air side mixed interference flow field interact to generate a flow field effect beneficial to heat radiation; the oil side mixing disturbance wave trough is adopted to change the laminar flow into the mixed flow, an oil side mixing disturbance flow field is formed by the oil side mixing disturbance wave trough of the radiator in the longitudinal direction, so that the flow direction of oil flow in an oil cavity is changed, the outer flow of the oil flow layer is mixed and mixed with the inner flow of the oil flow layer, the oil flow temperature of each oil flow layer in the cavity is fully mixed by changing the oil flow direction, and the inner layer and the outer layer of the oil flow are radiated by the surface of the radiating fin in the mixed flow state, so that the radiating efficiency is improved; two valley-shaped opposite oil cavities are designed in the oil cavity, and because the sectional area of the oil cavity is increased, the outer layer of the oil flow can not continuously depend on the inner wall of the oil flow cavity to flow downwards but can be separated from the inner wall of the oil flow cavity to flow downwards into the inner layer of the oil flow under the action of gravity to obtain the mixed flow of the oil flow of the inner layer and the outer layer, and the effect of the radiator on quick heat dissipation of the transformer hot oil in the oil cavity is realized through the mixed flow scheme; the utility model discloses technical scheme can increase by a wide margin more than the oil side geometric heat radiating area 9% under the prerequisite that does not change current sheet material cost.

The utility model provides an optimize structural design on the gas side and the oil survey of transformer oil-immersed radiator, increase and mix, the vortex structure, to the heat transfer air bed of radiator, oil pocket oil flow layer form mix the vortex, block the gas side thermal boundary layer upwards stack and derive the steam laminar flow in the section from the radiator gas side surface by the segmentation, make the heat transfer gas bed temperature reduce; meanwhile, the volume and the shape of an oil cavity on the oil side of the radiator are changed in a segmented mode, the flowing direction and the flowing speed of oil of the radiator are changed and are irregular, the purpose of efficient heat dissipation is achieved by segmented turbulent flow on the oil side of the radiator, the effective heat dissipation area of the ONAN of the radiator is increased due to the increase of the heat dissipation area on the oil side, and the heat dissipation capacity of the radiator is increased.

In order to solve the technical problem, the utility model discloses a technical scheme is: a plurality of shunting guide wave crests 16 are arranged on an oil channel 9 of a radiating single sheet 2 of a radiating fin of a radiator for a transformer, and the shape of the shunting guide wave crests is a peak shape and is convex from an oil side to an air side; the oil passage 9 of the radiating single sheet 2 of the radiating fin 1 is provided with a plurality of mixing disturbance wave troughs 17 which are valley-shaped and are recessed from the oil side to the air side.

The mixing disturbance wave trough 17 is in the shape of the inner wall of a peak-shaped shunt guide wave crest 16 on the heat dissipation single sheet 2;

the diversion guide wave crest 16 is in the shape of the outer wall of a valley-shaped mixing disturbance wave trough 17 on the heat dissipation single sheet 2;

the split guide peaks 16 have a curved shape 18 and a straight shape 19.

The two radiating single sheets 2 provided with the plurality of shunting guide wave crests 16 are opposite to form an air-side mixed flow field 20 outside the radiating fin 1;

the radiating fins 1 with the air-side mixed flow field 20 are adjacently arranged at certain intervals to form an inter-fin air-side mixed flow field 21.

The two radiating single sheets 2 provided with the plurality of the mixing disturbance wave troughs 17 are opposite to each other to form an oil side mixing disturbance flow field 22 in the oil cavity 13 of the radiating fin 1.

A rolling method I of the manufacturing approach of the air-cooling fin of the heat sink for the transformer, characterized by, the said board to make air-cooling fin 1 uses the steel or aluminium material sheet metal, process into correspondent pair of mountain valley shape lower roll mould 23 and mountain peak shape upper roll mould 24 on the roll mould according to the pattern shape of radiating single chip 2 oil duct 9 and distributing several shunting guide wave crests 16, mixing disturbance wave troughs 17 on it; then processing the plate mould into a corresponding plate mould according to the pattern shapes of the splitter box 3 and the confluence box 6;

when the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 are completely meshed, determining the position 25 of the key groove at the shaft end of the roller die, wherein the position 25 of the key groove at the upper shaft end and the position 26 of the key groove at the lower shaft end are vertical central line positions; the upper roller die gear 27 and the lower roller die gear 28 are completely meshed to determine the gear key groove position 29, and the gear key groove position 29 and the meshing position 26 are in the vertical central line position; through the determination of the key groove position 29 of the gear on the shaft and the key groove position 25 of the shaft end of the roller die, the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 on the roller die are pressed together, and the upper roller die gear 27 and the lower roller die gear 28 are meshed together to meet the rolling condition of the roller die;

separating the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 in a non-working state, and ensuring that the width of a gap separated between the maximum outer diameters of the two roller dies is larger than the thickness of a plate and meets the requirement of passing the plate; then applying a rotary power to the shaft end 30 of the mountain-like upper roll mold 24, rotating the valley-like lower roll mold 23 through the upper roll mold gear 27, applying an upward pressure to the two shaft ends 30 of the valley-like lower roll mold 23 to press the two roll molds together, passing the flat sheet through the valley-like lower roll mold 23 and the mountain-like upper roll mold 24 while rotating and pressing the same, reserving a separation groove position 31 on the flat sheet when rolling the split groove 3 and the confluence groove 6, keeping the upper roll mold gear 27 and the lower roll mold gear 28 engaged, releasing the relative pressure applied to the two shaft ends 30 of the valley-like lower roll mold 23 to separate the valley-like lower roll mold 23 from the peak-like upper roll mold 24 to the maximum outer diameter, and delivering the gap width between the valley-like lower roll mold 23 and the peak-like upper roll mold 24 to be greater than the thickness of the flat sheet, so that the split groove 3 and the confluence groove 6 are not passed through the valley-like lower roll mold 23 and the peak-like upper roll mold 24, i.e., delivering the split groove 3 and the flat sheet to the confluence groove 6 A die pressing forming position 32 for pressing the connection of the shunting grooves 3 and the confluence grooves 6 with the two end parts of the heat dissipation single chip 2 in the length direction of the sheet type, wherein an upper roller die gear 27 and a lower roller die gear 28 at the shaft end 30 of the paired roller dies are always in a meshing state 33 during rolling and a gear meshing state 34 during roller separation in the above processes, so that the forming rolling of the heat dissipation single chip 2 is completed;

the rolling method II is different from the method I in that the flat plate die is processed into a proper pair of valley-shaped lower flat plate die and a peak-shaped upper flat plate die according to the oil duct 9 of the heat dissipation single sheet 2 and the pattern shapes of a plurality of shunting guide wave crests 16 and seepage disturbance wave troughs 17 distributed on the oil duct, and the forming rolling of the heat dissipation single sheet 2 is completed by adopting the existing flat plate die continuous rolling process;

after finishing the forming and rolling of the radiating single sheets 2, oppositely jointing and aligning a peripheral weld bead 14 and a middle weld bead 15, of which the peripheral edges are flat, of the two radiating single sheets 2, and manufacturing the peripheral edges of the two radiating single sheets 2 by adopting the existing welding process in the industry; and cutting the periphery edge excess material of the heat radiating fin 1 which is welded in a combined mode, and transferring to the next process of the manufacturing process of the heat radiator for the transformer.

The utility model discloses following profitable effect has:

(1) the oil side area of the cooling fin is measured by three-dimensional software, and the data shows that the oil side area of the cooling fin is increased by about 9 percent compared with the oil side area of the existing cooling fin, two valley-shaped opposite seepage disturbance wave troughs are designed in the oil cavity, so that the sectional area of the oil cavity is increased unnecessarily, the outer layer of the oil flow can not continuously flow downwards along the inner wall of the oil flow cavity under the action of gravity, but flows downwards along the inner layer of the oil flow to separate from the inner wall of the oil flow cavity to obtain the mixed flow of the oil flow of the inner layer and the outer layer, and the laminar flow in the oil cavity almost completely obtains multiple shunting mixed flow under the action of a plurality of seepage disturbance wave troughs; the effect of the radiator for quickly radiating the hot oil of the transformer in the mixed flow cavity is realized through the scheme;

(2) the technical proposal of the utility model can greatly increase the geometric heat dissipation area of the oil side on the premise of not changing the cost of the existing sheet material;

(3) the heat dissipation effect of the heat dissipation plate under the passive cooling (ONAN) condition is increased by about 15% compared with that of the existing heat dissipation plate, and the heat dissipation effect of the heat dissipation plate under the fan cooling (ONAF) condition is increased by about 20% compared with that of the existing heat dissipation plate.

(4) On the premise that the material cost of the radiating fins is not increased, the radiating efficiency of the radiator is improved, so that the material cost of the radiator under unit radiating power is reduced, the quantity of the radiators matched with the transformer is reduced due to the fact that the radiating efficiency of the radiator is improved, the oil loading quantity of the transformer is reduced, the manufacturing cost of the transformer is reduced, a certain quantity of radiator cooling fans can be reduced, and the overall dimension of the transformer is reduced due to the fact that the quantity of the radiators matched with the transformer is reduced, and the using space of equipment is saved.

Drawings

FIG. 1 is an axial view of a heat sink;

FIG. 2 is a front view of a fin of the undulating oil gallery;

FIG. 3 is a front view of a fin of the ladder oil passage;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 2 and a schematic cross-sectional view of a conventional wave-shaped oil passage of a heat sink;

FIG. 5 is a cross-sectional schematic view F-F of FIG. 3 and a cross-sectional schematic view of a prior art ladder oil passage of a heat sink;

FIG. 6 is a schematic cross-sectional view of a trapezoidal wave-shaped hybrid oil passage of a conventional heat sink;

FIG. 7 is a cross-sectional view B-B of FIG. 2;

FIG. 8 is a cross-sectional schematic view C-C of FIG. 2;

FIG. 9 is a schematic sectional view taken at the angle G-G of FIG. 3;

FIG. 10 is a cross-sectional schematic view H-H of FIG. 3;

FIG. 11 is a schematic elevation view of a curved split guide peak;

FIG. 12 is a schematic oil view of a curved split guide crest;

FIG. 13 is a schematic front view of a linear shunt guide peak;

FIG. 14 is a schematic view of oil measurement of a straight split guide peak;

FIG. 15 is a schematic view of the air side mixing flow field of the heat sink;

FIG. 16 is a schematic view of an air-side turbulent flow field in another direction of the diversion guide wave crests on the fins;

FIG. 17 is a schematic view of an interband gas-side mixing flow field;

FIG. 18 is a schematic cross-sectional view E-E and a schematic oil-side mixing flow field of FIG. 2;

FIG. 19 is a schematic view of a longitudinal cross-section of an oil passage and a fluid field of oil-side mixing of the heat sink formed by the heat dissipating monoliths of FIGS. 2 and 15;

FIG. 20 is an alternative arrangement of the shunt guide peaks on the fins;

FIG. 21 is a front view schematically showing the state of engagement during roll rolling;

FIG. 22 is a front view of the gear engagement state when the rolls are separated;

FIG. 23 is a left side schematic view of FIG. 21;

FIG. 24 is a schematic cross-sectional view I-I of FIG. 21;

FIG. 25 is a left side schematic view of FIG. 22;

FIG. 26 is a schematic sectional view of J-J of FIG. 22;

FIG. 27 is a schematic axial view of a rolling process;

in the figure: 1, a heat radiating fin; 2, radiating a single chip; 3, a splitter box; 4, an oil inlet; 5, a shunting cavity; 6, a confluence groove; 7, an oil outlet; 8, a confluence cavity; 9, an oil duct; 10, wave type; 11, ladder type; 12, trapezoidal wave mixed type; 13, an oil chamber; 14, a peripheral bead; 15, middle weld bead; 16, splitting and guiding the wave crest; 17, mixing disturbance wave trough; 18, a curved shape; 19 is straight-line; 20, a gas side mixed flow field; 21, mixing and disturbing a flow field at the gas side between the sheets; 22 oil side mixing flow field; 23, a valley-shaped lower roller die; 24, a mountain-shaped upper roller die; 25, shaft end keyway position; 26, a mesh; 27, upper roller die gear; 28, a lower roll die gear; 29 gear keyway position; 30, shaft end; 31, dividing the confluence groove; 32, pressing and forming a flat plate mould; 33, meshing state during rolling; and 34, gear meshing state when the roller is separated.

Detailed Description

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

As shown in fig. 1 to 3, a heat sink of a heat sink for a transformer, wherein a heat sink 1 is formed by welding a peripheral joint part and a middle joint part after two heat dissipating single sheets 2 are arranged oppositely;

the heat dissipation single sheet 2 includes:

the shunting groove 3 is oppositely arranged to form a shunting cavity 5 with an oil inlet 4 of the radiating fin, and the shunting cavity 5 is used for enabling oil of the radiating fin 1 to enter and shunt into an oil duct;

the converging groove 6 is opposite to a converging cavity 8 with an oil outlet 7, which forms the radiating fin, and the converging cavity 8 is used for converging and flowing out oil in the oil channel of the radiating fin 1;

as shown in fig. 4 to 6, the cross-sectional shape of the oil passage 9 includes a wave shape 10, a trapezoid shape 11, a trapezoid wave shape mixed type 12, and the like; which are correspondingly arranged oppositely to form an oil chamber 13;

a peripheral weld bead 14, which is a peripheral joint part where the two radiating single sheets 2 are opposite and is used for connecting, sealing and welding the two radiating single sheets;

the middle welding bead 15 is the middle joint part of the two opposite radiating single sheets 2 and is used for connecting, reinforcing and welding the two radiating single sheets;

as shown in fig. 1 to 6, the above-described features are all common to the heat sink of the conventional heat sink for a transformer.

The utility model is characterized in that the radiating fin 1,

as shown in fig. 1 to 3 and 7 to 10, the oil passage 9 of the heat radiating single sheet 2 of the heat radiating fin 1 is provided with a plurality of split guide peaks 16 which are peak-shaped and are protruded from the oil side to the air side;

the oil passage 9 of the radiating single sheet 2 of the radiating fin 1 is provided with a plurality of mixing disturbance wave troughs 17 which are valley-shaped and are recessed from the oil side to the air side.

As shown in fig. 7 to 10, the mixing disturbance wave trough 17 is the inner wall shape of the peak-shaped diversion guide wave crest 16 on the heat dissipation single sheet 2;

the diversion guide wave crest 16 is the outer wall shape of a valley-shaped mixing disturbance wave trough 17 on the heat dissipation single sheet 2;

as shown in fig. 11-14, the diversion guide wave crest 16 has a curved shape 18 and a straight shape 19, and the shape is not limited to the direction and angle indicated by the illustration of the present invention, and the effect of fluid infiltration and mixing disturbance inside and outside the heat sink can be achieved.

As shown in fig. 15, 16 and 20, two radiating single sheets 2 provided with a plurality of shunt guide peaks 16 are opposed to each other to form an air-side turbulent flow field 20 outside the radiating fin 1; radiating fins 1 formed by combining different types or the same types of radiating single sheets 2 formed by staggering, horizontal or other arrangements of the shunting guide wave crests 16 on the radiating single sheets 2 can form air side turbulent flow fields 20 beneficial to radiating;

as shown in fig. 17, a plurality of heat sinks 1 with air-side turbulent flow fields 20 are arranged adjacently with a certain inter-sink distance to form inter-sink air-side turbulent flow fields 21; radiating fins 1 formed by combining different or same radiating single sheets 2 are arranged adjacently at a certain sheet interval to form an inter-sheet air-side mixed flow field 21 beneficial to radiating;

as shown in fig. 18 and 19, two single heat dissipating sheets 2 with a plurality of mixing disturbance wave troughs 17 are arranged oppositely to form an oil side mixing flow field 22 in an oil chamber 13 of the heat dissipating sheet 1, and the heat dissipating sheets 1 formed by different or same combination of the single heat dissipating sheets 2 formed by staggering, horizontal or other arrangement of the mixing disturbance wave troughs 17 on the single heat dissipating sheets 2 can form the oil side mixing flow field 22 beneficial to heat dissipation;

as shown in fig. 21 to 27, a first rolling method of the manufacturing method of the heat sink fin of the heat sink for the transformer is characterized in that the plate material for manufacturing the heat sink fin 1 is a steel or aluminum thin plate, and the plate material is processed into a proper pair of valley-shaped lower rolling roller die 23 and a peak-shaped upper rolling roller die 24 on the rolling roller die according to the pattern shape of the oil passage 9 of the single heat sink sheet 2 and the distribution of a plurality of branch guiding peaks 16 and mixing disturbance valleys 17 on the oil passage; then processing the plate mould into a corresponding plate mould according to the pattern shapes of the splitter box 3 and the confluence box 6;

when the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 are completely meshed, determining the position 25 of the key groove at the shaft end of the roller die, wherein the position 25 of the key groove at the upper shaft end and the position 26 of the key groove at the lower shaft end are vertical central line positions; the upper roller die gear 27 and the lower roller die gear 28 are completely meshed to determine the gear key groove position 29, and the gear key groove position 29 and the meshing position 26 are in the vertical central line position; through the determination of the key groove position 29 of the gear on the shaft and the key groove position 25 of the shaft end of the roller die, the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 on the roller die are pressed together, and the upper roller die gear 27 and the lower roller die gear 28 are meshed together to meet the rolling condition of the roller die;

separating the valley-shaped lower roller die 23 and the peak-shaped upper roller die 24 in a non-working state, and ensuring that the width of a gap separated between the maximum outer diameters of the two roller dies is larger than the thickness of a plate and meets the requirement of passing the plate; then applying a rotary power to the shaft end 30 of the mountain-like upper roll mold 24, rotating the valley-like lower roll mold 23 through the upper roll mold gear 27, applying an upward pressure to the two shaft ends 30 of the valley-like lower roll mold 23 to press the two roll molds together, passing the flat sheet through the valley-like lower roll mold 23 and the mountain-like upper roll mold 24 while rotating and pressing the same, reserving a separation groove position 31 on the flat sheet when rolling the split groove 3 and the confluence groove 6, keeping the upper roll mold gear 27 and the lower roll mold gear 28 engaged, releasing the relative pressure applied to the two shaft ends 30 of the valley-like lower roll mold 23 to separate the valley-like lower roll mold 23 from the peak-like upper roll mold 24 to the maximum outer diameter, and delivering the gap width between the valley-like lower roll mold 23 and the peak-like upper roll mold 24 to be greater than the thickness of the flat sheet, so that the split groove 3 and the confluence groove 6 are not passed through the valley-like lower roll mold 23 and the peak-like upper roll mold 24, i.e., delivering the split groove 3 and the flat sheet to the confluence groove 6 A die pressing forming position 32 for pressing the connection of the shunting grooves 3 and the confluence grooves 6 with the two end parts of the heat dissipation single chip 2 in the length direction of the sheet type, wherein an upper roller die gear 27 and a lower roller die gear 28 at the shaft end 30 of the paired roller dies are always in a meshing state 33 during rolling and a gear meshing state 34 during roller separation in the above processes, so that the forming rolling of the heat dissipation single chip 2 is completed;

the rolling method II is different from the method I in that the flat plate die is processed into a proper pair of valley-shaped lower flat plate die and a peak-shaped upper flat plate die according to the oil duct 9 of the heat dissipation single sheet 2 and the pattern shapes of a plurality of shunting guide wave crests 16 and seepage disturbance wave troughs 17 distributed on the oil duct, and the forming rolling of the heat dissipation single sheet 2 is completed by adopting the existing flat plate die continuous rolling process;

after finishing the forming and rolling of the radiating single sheets 2, oppositely jointing and aligning a peripheral weld bead 14 and a middle weld bead 15, of which the peripheral edges are flat, of the two radiating single sheets 2, and manufacturing the peripheral edges of the two radiating single sheets 2 by adopting the existing welding process in the industry; and cutting the periphery edge excess material of the heat radiating fin 1 which is welded in a combined mode, and transferring to the next process of the manufacturing process of the heat radiator for the transformer.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (4)

1. A heat sink of a heat sink for a transformer is disclosed, wherein a heat sink (1) is formed by welding a peripheral joint part and a middle joint part after two heat dissipation single sheets (2) are oppositely arranged;

the heat dissipation single sheet (2) comprises:

the flow dividing groove (3) is oppositely arranged to form a flow dividing cavity (5) of the radiating fin, wherein the flow dividing cavity (5) is provided with an oil inlet (4), and the oil of the radiating fin (1) enters and is divided into an oil duct;

the converging groove (6) is opposite to a converging cavity (8) which forms the radiating fin and is provided with an oil outlet (7), and the converging cavity (8) is used for converging and flowing out oil in an oil channel of the radiating fin (1);

an oil passage (9) having a cross-sectional shape including a wavy type (10), a trapezoidal type (11), and a trapezoidal and wavy mixed type (12); which are oppositely arranged to form an oil chamber (13);

a peripheral welding bead (14) which is a peripheral joint part opposite to the two radiating single sheets (2) and is used for connecting, sealing and welding the two radiating single sheets;

the middle welding bead (15) is the middle joint part where the two radiating single sheets (2) are opposite and is used for connecting, reinforcing and welding the two radiating single sheets;

the heat sink (1) is characterized in that,

a plurality of shunting guide wave crests (16) are arranged on an oil channel (9) of the radiating single sheet (2) of the radiating fin (1), are in a peak shape, and protrude from the oil side to the air side;

a plurality of mixing disturbance wave troughs (17) are arranged on an oil channel (9) of the radiating single sheet (2) of the radiating fin (1), are valley-shaped, and are sunken from the oil side to the air side.

2. A radiator fin of a transformer radiator according to claim 1, wherein said mixing disturbance wave trough (17) is in the shape of the inner wall of a mountain-like shunt guide wave crest (16) on the radiating single sheet (2);

the diversion guide wave crest (16) is in the shape of the outer wall of a valley-shaped mixing disturbance wave trough (17) on the heat dissipation single sheet (2);

the diversion guide wave crest (16) is provided with a curved shape (18) and a straight shape (19).

3. A transformer radiator fin according to claim 1, wherein said two radiating fins (2) provided with a plurality of split guide peaks (16) are opposed to each other to constitute an air-side mixed turbulent flow field (20) outside the fin (1);

the radiating fins (1) with the air side mixed flow field (20) are adjacently arranged at certain fin intervals to form an inter-fin air side mixed flow field (21).

4. A radiator fin for a transformer radiator according to claim 1, wherein said two radiating single sheets (2) provided with a plurality of mixing disturbance valleys (17) are opposed to constitute an oil-side mixing disturbance flow field (22) in an oil chamber (13) of the fin (1).

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