CN111785488A - Dry-type transformer with improved heat dissipation and production process thereof - Google Patents
Dry-type transformer with improved heat dissipation and production process thereof Download PDFInfo
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- CN111785488A CN111785488A CN202010469961.2A CN202010469961A CN111785488A CN 111785488 A CN111785488 A CN 111785488A CN 202010469961 A CN202010469961 A CN 202010469961A CN 111785488 A CN111785488 A CN 111785488A
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- voltage coil
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- heat dissipation
- type transformer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- Coils Of Transformers For General Uses (AREA)
Abstract
A dry-type transformer with improved heat dissipation and a production process thereof are disclosed, the dry-type transformer comprises a transformer base, an iron core column, a high-low voltage coil group and a plurality of assembly connectors, wherein the high-low voltage coil group and the plurality of assembly connectors are sleeved on the iron core column; winding a low-voltage coil; step three, manufacturing a radiating fin; and step four, the high-voltage coil in the step one, the low-voltage coil in the step two, the radiating fins, the iron core, the transformer base and the assembling connecting piece in the step three are assembled in a general mode, and the radiating fins are arranged for radiating heat to prolong the service life of the dry-type transformer.
Description
Technical Field
The invention relates to the field of dry-type transformers, in particular to a dry-type transformer with improved heat dissipation and a production process thereof.
Background
The dry transformer is mainly composed of an iron core composed of silicon steel sheets and a coil poured by epoxy resin, an insulating cylinder is arranged between the high-voltage coil and the low-voltage coil to increase electrical insulation, the coil is supported and restrained by a cushion block, and fasteners lapped by parts of the coil all have anti-loosening performance
The Chinese utility model patent (application number 201720921151.X, publication number: CN 207397863U) discloses a dry-type transformer, which comprises a transformer main body, a base, a movable wheel, a high-voltage connecting bus, a high-voltage outgoing conductor, a heat dissipation device and an adjusting and fixing device, wherein the transformer main body is arranged on the upper part of the base; the base is fixed in the heat dissipation device. The bottom wheel is a polyurethane wheel, so that the self friction degree of the bottom wheel is reduced, and the service life is prolonged; the sensor, the heat dissipation fan and the controller are arranged, so that when the temperature in the storage bin is too high, the controller can control the heat dissipation fan to dissipate heat; the arrangement of the extension rod, the extension pipe, the support pipe, the fixing bolt, the mounting hole, the support rod, the through hole and the mounting plate is favorable for conveniently placing the placing box, and the placing box can be adjusted according to different types of transformers; the fixed orifices, the fixed plate, the return pulley, the fixed axle, the installation piece, connecting rod and adjusting bolt's setting is favorable to the easy to assemble to remove the wheel, further is favorable to conveniently removing and places the case, but still has following weak point in the use of reality: the existing dry-type transformer adopts a fan to perform air cooling blowing heat dissipation on the whole transformer, and a structure for performing local targeted heat dissipation on the transformer is lacked.
Disclosure of Invention
The invention provides a dry-type transformer with improved heat dissipation and a production process thereof, and mainly aims to overcome the defect of heat dissipation of a copper bar on a low-voltage coil in the transformer.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an improve radiating dry-type transformer, this dry-type transformer includes transformer base, locates iron core post, the cover that three interval set up on the transformer base are established high-low voltage coil assembly and a plurality of assembly connectors on the iron core post, the iron core post the transformer base reaches high-low voltage coil assembly all passes through assembly connectors assembly erection joint is in the same place, high-low voltage coil assembly sets up the low-voltage coil that high-voltage coil and three interval set up including three interval, the low-voltage coil orientation be equipped with a first copper bar on iron core post one side, be equipped with a second copper bar on the low-voltage coil opposite side, the installation is provided with an at least heating panel of buckling on the first copper bar, the heating panel is the heat conduction material. Through the heating panel of installing the buckle on first copper bar, the heat radiating area that the heating panel can increase first copper bar on the one hand is convenient for the heat dissipation of first copper bar, and on the other hand sets up the fin of buckling and compares in the heating panel of rectangular shape, and its wind-engaging face that forms two directions after buckling has better cooling surface can receive the forced air cooling to act on the heating panel, kills two birds with one stone.
Furthermore, the heat dissipation plate comprises a bending part, a first extension part arranged on one side of the bending part and extending, and a second extension part arranged on the other side of the bending part and extending, wherein one end of the first extension part is installed on the first copper bar. By arranging the second extension part, when the second extension part extends towards the direction of the second copper bar, the air for cooling can be guided to the second copper bar, thus being beneficial to the air-cooled heat dissipation of the second copper bar, when the second extension part extends towards the direction of the iron core column, the air for cooling can be guided to the iron core column, thus being beneficial to the air-cooled heat dissipation of the iron core column,
further, the included angle between the first extension part and the second extension part is A, wherein the included angle is more than 0 degrees and less than 180 degrees.
Furthermore, the assembly connecting piece comprises a zero line copper bar connected with the second copper bar, and at least one heat dissipation plate is arranged on the zero line copper bar. Through set up the wind that the heating panel was available to be blown by the direction on the first copper bar on the zero line copper bar, the reutilization carries out the forced air cooling heat dissipation to second copper bar and zero line copper bar.
Furthermore, the first extending part is provided with at least one first opening hole for assembly, and the second extending part is provided with at least one second opening hole. Be used for installing the fin on first copper bar through setting up first trompil, help the refluence heat dissipation through setting up the second trompil, on the other hand can be used for the assembly to make the fin install on first copper bar with the second trompil with the heating panel accent when first trompil damages, improves the life of fin, kills two birds with one stone.
Furthermore, the radiating fins are integrally formed or welded.
A dry-type transformer production process comprises the following steps,
step one, winding a high-voltage coil;
winding a low-voltage coil;
step three, manufacturing a radiating fin;
and step four, carrying out general assembly on the high-voltage coil in the step one, the low-voltage coil in the step two, the radiating fin in the step three, the iron core, the transformer base and the assembly connecting piece.
Furthermore, in the third step, the manufacture of the heat sink is composed of the following procedures in sequence,
step 3a, punching a hole in one end of one heat conduction material to form a first opening for assembling a bolt to form a first extension part, and punching a hole in one end of the other heat conduction material to form a second opening to form a second extension part;
step 3b, connecting the first extending part and the second extending part in the step 3a together, wherein an included angle between the first extending part and the second extending part is A, and A is more than 0 degree and less than 180 degrees;
and 3c, mounting the first extending part on the assembling hole of the first copper bar.
And further, in the third step, manufacturing the radiating fin sequentially comprises the following steps of 3d, taking an L-shaped heat conducting material, forming a first opening hole by opening a hole at one end of the heat conducting material, and forming a second opening hole by opening a hole at the other end of the heat conducting material to manufacture the radiating fin.
Furthermore, in the fourth step, the iron core is sequentially composed by the following procedures,
step 4a, performing a longitudinal shearing process on the iron core raw material;
step 4b, performing a transverse shearing process on the iron core raw material subjected to the longitudinal shearing process in the step 3 a;
step 4d, performing a stacking process on the iron core raw materials subjected to the transverse shearing process in the step 3 b;
step 4e, end sealing is carried out on the iron core raw material subjected to the stacking procedure in the step 3d to obtain an iron core;
and 4e, end sealing is carried out on the iron core raw material: and coating a normal-temperature epoxy resin coating on the end part of the iron core, standing for 2h, and waiting for solidification.
Compared with the prior art, the invention has the beneficial effects that:
the first copper bar is provided with the bent radiating plate, and the bent radiating plate is arranged on the first copper bar, so that the radiating area of the first copper bar can be increased by the radiating plate to facilitate the radiating of the first copper bar, and compared with a strip-shaped radiating plate, the bent radiating plate is bent to form two-direction wind-receiving surfaces, so that the radiating surfaces can be better cooled by wind and can be applied to the radiating plate.
Drawings
Fig. 1 is a schematic structural diagram of a dry-type transformer.
Fig. 2 is a schematic structural diagram of a portion B in fig. 1.
Fig. 3 is a production process diagram of the dry type transformer.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
In a first embodiment, referring to fig. 1, 2 and 3, a dry-type transformer with improved heat dissipation and a manufacturing process thereof are provided, the dry-type transformer includes a transformer base 44, three core legs disposed on the transformer base 44 at intervals, a high-low voltage coil set 41 disposed on the core legs, a blower mounted on the transformer base 44, and a plurality of assembly connectors, the core legs, the transformer base 44, and the high-low voltage coil set 41 are assembled and connected together by the assembly connectors, the high-low voltage coil set 41 includes three high-voltage coils disposed at intervals and three low-voltage coils disposed at intervals, a first copper bar 16 is disposed on one side of the low-voltage coil facing the core legs, a second copper bar 17 is disposed on the other side of the low-voltage coils, at least one bent heat dissipation plate 1 is disposed on the first copper bar 16 (three heat dissipation plates 1 are illustrated in fig. 1 and are respectively mounted on the first copper bars, the heat sink 1 is made of a heat conductive material, and may be made of a metal material capable of conducting heat. The fin is L-shaped in cross-section and the preferred fin material is copper.
More specifically heating panel 1 can purchase the L shape copper bar of selling on the market, then adopts the mode of physics assembly to install L shape copper bar on first copper bar 16 upper portion, is equipped with at least one first pilot hole 11 that is used for the installation on first copper bar 16, and the fin is made for integrated into one piece or welded connection.
The assembly connecting piece comprises a body insulating piece arranged on the high-voltage coil group 41, an upper clamping piece assembly, a lower clamping piece assembly, a high-voltage lead wire connected with the high-voltage coil, a connecting piece connected with the high-voltage coil, a low-voltage lead wire connected with the low-voltage coil, a plurality of insulators arranged between the first copper bar 16 and the second copper bar 17, zero line copper bars connected with the second copper bar 17, bolts, nuts, gaskets and other connecting pieces which are well known in the field of dry-type transformers and used for assembly, and therefore the descriptions are omitted.
The zero line copper bar can also be provided with at least one L-shaped heat dissipation plate 20, so that the zero line copper bar is subjected to heat dissipation and is assembled by using bolts and nuts.
The body insulator includes an insulating cylinder sleeved between the high-voltage coil and the low-voltage coil and a plurality of cushion blocks 42 installed on the upper and lower sides of the high-voltage coil and the low-voltage coil.
The upper and lower clamping piece assemblies comprise two lower clamping pieces 43 arranged on two sides of the bottom of the iron core column and two upper clamping pieces 21 arranged on the left side and the right side of the upper part of the iron core column, the lower clamping pieces 43 are arranged on the first base, and the upper clamping pieces 21 and the lower clamping pieces 43 are U-shaped channel steel.
The heat radiating plate 1 is mounted by mounting nuts through the first fitting holes 11 using bolts 18 so that the heat radiating plate 1 is mounted on the first copper bars 16.
The heat dissipation plate 1 includes a bending portion 13, a first extending portion 12 disposed on one side of the bending portion 13 and a second extending portion 15 disposed on the other side of the bending portion 13, wherein one end of the first extending portion 12 is mounted on the first copper bar 16, and the first extending portion 12 and the second extending portion 15 are both in a long strip shape. The second extending portion can extend towards the direction of the second copper bar, and the first extending portion extends towards the arrangement direction of the low-voltage coils.
The first extension 12 and the second extension 15 form an angle A, where 0 < A < 180.
The first extension portion 12 is provided with at least one first opening for assembly, and the second extension portion 15 is provided with at least one second opening. The first openings are preferably arranged in four square arrays and the second openings are preferably arranged in four square arrays.
The specific aperture specification of this first trompil in this embodiment is the aperture specification that can supply the bolt to pass the assembly, uses the bolt to pass first trompil and realizes installing first extension on first copper bar, and the aperture specification of this second trompil is the aperture specification that can supply the bolt to pass the assembly.
The production process of the dry-type transformer comprises the following steps,
step one, winding a high-voltage coil;
winding a low-voltage coil;
step three, manufacturing a radiating fin 1;
and step four, carrying out general assembly on the high-voltage coil in the step one, the low-voltage coil in the step two, the radiating fin, the iron core, the transformer base 44 and the assembly connecting piece in the step three.
In this embodiment, a specific step may be sequentially composed of the following processes,
step 1a, installing a high-voltage coil mold on a high-voltage coil winding machine for rotation, and preparing the high-voltage coil mold;
step 1b, winding a winding wire and a first insulating layer on a high-voltage coil die, inserting a plurality of air channel rods arranged at intervals, connecting the winding wire with a connecting terminal, brushing a layer of release agent (the release agent is polysiloxane with a reticular structure highly crosslinked by organic silicon resin and has thermal stability) between the first insulating layer and the high-voltage coil, and performing a first coil winding process to obtain a first coil;
step 1c, sending the first coil obtained in the step 1b into a curing drying oven for drying, keeping the temperature at 145-150 ℃, preferably 145 ℃, for 8-9 h, preferably 8.5 h;
step 1d, conveying the first coil dried in the step 1c into a resin casting machine for casting;
step 1e, sending the first coil which is cast in the step 1d into a curing and drying box for curing and drying;
step 1f, performing a demoulding, material returning and cooling process on the first coil in the step 1 e;
step 1g, polishing and finishing the outer surface of the high-voltage coil obtained in the step 1f to enable the port of the high-voltage coil to be flat and smooth, and performing a finishing process to obtain the high-voltage coil;
in this embodiment, the second step may be composed of the following steps in sequence,
step 2a, mounting a low-voltage coil mold on a foil winding machine (foil winding machine model number RJB 1400) for rotation, and preparing the low-voltage coil mold;
step 2b, winding a second insulating layer and a copper foil on a low-voltage coil die, loading two copper bars arranged at intervals, loading a plurality of drawing pieces arranged at intervals and a temperature control probe tube bound on one drawing piece (3240 epoxy tubes are wrapped on the outer surface of the temperature control probe tube, and the second insulating layer at the end part and one drawing piece are bound together and arranged in a second air passage), and winding a second coil to obtain a second coil;
step 2c, conveying the second coil obtained in the step 2b into a drying box, keeping the temperature at 145-150 ℃, preferably 145 ℃, for 7-8 hours, preferably 8 hours, and performing a second coil drying process;
step 2d, taking out the second coil processed in the step 2c, carrying out an end-sealing process by using normal-temperature epoxy resin, standing for 2h and cooling;
and 2e, removing the low-voltage coil mold from the second coil subjected to the end sealing process, and performing a demolding process to obtain the low-voltage coil.
The optimal temperature is 145 ℃ which is the same, and energy loss caused by large-range temperature change is reduced.
In the third step, the manufacture of the heat sink is composed of the following procedures in sequence,
step 3a, punching a hole in one end of one heat conduction material to form a first opening for assembling a bolt to form a first extension part, and punching a hole in one end of the other heat conduction material to form a second opening to form a second extension part;
step 3b, connecting the first extending part and the second extending part in the step 3a together, wherein an included angle between the first extending part and the second extending part is A, and A is more than 0 degree and less than 180 degrees;
and 3c, mounting the first extending part on the assembling hole of the first copper bar. The first extending portion can be installed on the assembling hole in the first copper bar through the first opening by using a bolt and locked by using a nut.
When the heat conductive material in step 3a is copper, the connection method can be welding.
In the fourth step, the iron core is composed by the following procedures in sequence,
step 4a, performing a longitudinal shearing process on the iron core raw material;
step 4b, performing a transverse shearing process on the iron core raw material subjected to the longitudinal shearing process in the step 4 a;
step 4d, performing a stacking process on the iron core raw materials subjected to the transverse shearing process in the step 4 b;
step 4e, carrying out end sealing on the iron core raw material subjected to the stacking procedure in the step 4d to obtain an iron core;
and 4e, end sealing is carried out on the iron core raw material: and coating a normal-temperature epoxy resin coating on the end part of the iron core, standing for 2h, and waiting for solidification.
In another manufacturing method of the heat dissipation plate, in the third step, manufacturing the heat dissipation plate sequentially comprises the following steps of 3a, taking an L-shaped heat conduction material, forming a first opening by opening a hole at one end of the heat conduction material, and forming a second opening by opening a hole at the other end of the heat conduction material to obtain the heat dissipation plate.
In the second embodiment, referring to fig. 2, the difference between the second embodiment and the first embodiment is: the bending part can be a flat plate, one end of the extending direction of the bending part is connected with the first extending part, the other end of the extending direction of the bending part is connected with the second extending part, the included angle between the bending part and the first extending part is B, wherein, B is more than 0 degree and less than 180 degrees, the included angle between the bending part and the second extending part is C, wherein, C is more than 0 degree and less than 180 degrees, the bending part can also be a heat conducting material plate with a bend, the bending part is arranged to improve the wind guiding effect of the heat dissipation plate on one hand and improve the heat dissipation area of the heat dissipation plate on the other hand, thereby achieving two purposes at one time, the bent part can reversely guide the wind blown from the first extension part or the second extension part to flow back to the first extension part or the second extension part, so that secondary air cooling is realized, the utilization rate of the wind is improved, and the heat dissipation effect is improved.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (9)
1. The utility model provides an improve radiating dry-type transformer, this dry-type transformer includes transformer base, locates iron core post, the cover that three interval set up on the transformer base are established high-low voltage coil group and a plurality of assembly connectors on the iron core post, the iron core post the transformer base reaches high-low voltage coil group all passes through assembly connectors assembly installation links together, high-low voltage coil group sets up the low voltage coil that high-voltage coil and three interval set up including three interval, the low voltage coil orientation be equipped with a first copper bar on iron core post one side, be equipped with a second copper bar on the low voltage coil opposite side, its characterized in that: the first copper bar is provided with at least one bent heat dissipation plate, and the heat dissipation plate is made of heat conduction materials.
2. A dry-type transformer with improved heat dissipation as set forth in claim 1, wherein: the heat dissipation plate comprises a bending part, a first extension part and a second extension part, wherein the first extension part is arranged on one side of the bending part and extends, the second extension part is arranged on the other side of the bending part and extends, and one end of the first extension part is arranged on the first copper bar.
3. A dry-type transformer with improved heat dissipation as set forth in claim 2, wherein: the included angle between the first extension part and the second extension part is A, wherein the included angle is more than 0 degree and less than 180 degrees.
4. A dry-type transformer with improved heat dissipation as set forth in claim 1, wherein: the assembly connecting piece comprises a zero line copper bar connected with the second copper bar, and at least one heat dissipation plate is arranged on the zero line copper bar.
5. A dry-type transformer with improved heat dissipation as set forth in claim 2, wherein: the first extending part is provided with at least one first opening hole for assembly, and the second extending part is provided with at least one second opening hole.
6. A dry-type transformer with improved heat dissipation as recited in claims 1-5, wherein: the radiating fins are integrally formed or welded.
7. A production process of a dry-type transformer is characterized by comprising the following steps: the production process for producing a dry-type transformer as claimed in claims 1 to 7, the production process steps comprising,
step one, winding a high-voltage coil;
winding a low-voltage coil;
step three, manufacturing a radiating fin;
and step four, carrying out general assembly on the high-voltage coil in the step one, the low-voltage coil in the step two, the radiating fin in the step three, the iron core, the transformer base and the assembly connecting piece.
8. A dry-type transformer production process as claimed in claim 7, wherein: in the third step, the manufacture of the heat sink is composed of the following procedures in sequence,
step 3a, punching a hole in one end of one heat conduction material to form a first opening for assembling a bolt to form a first extension part, and punching a hole in one end of the other heat conduction material to form a second opening to form a second extension part;
step 3b, connecting the first extending part and the second extending part in the step 3a together, wherein an included angle between the first extending part and the second extending part is A, and A is more than 0 degree and less than 180 degrees;
and 3c, mounting the first extending part on the assembling hole of the first copper bar.
9. A dry-type transformer production process as claimed in claim 7, wherein: and 3d, taking an L-shaped heat conduction material, forming a first opening by opening a hole at one end of the heat conduction material, and forming a second opening by opening a hole at the other end of the heat conduction material to form the heat dissipation fin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010469961.2A CN111785488A (en) | 2020-05-28 | 2020-05-28 | Dry-type transformer with improved heat dissipation and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010469961.2A CN111785488A (en) | 2020-05-28 | 2020-05-28 | Dry-type transformer with improved heat dissipation and production process thereof |
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| CN111785488A true CN111785488A (en) | 2020-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112927922A (en) * | 2021-03-18 | 2021-06-08 | 华翔翔能科技股份有限公司 | Dry-type transformer production process method |
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2020
- 2020-05-28 CN CN202010469961.2A patent/CN111785488A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112927922A (en) * | 2021-03-18 | 2021-06-08 | 华翔翔能科技股份有限公司 | Dry-type transformer production process method |
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