A transformer secondary winding and manufacturing process thereof

Abstract

The invention discloses a transformer secondary winding and a manufacturing process thereof, comprising a winding U-shaped tube, a die-stamped converging water-cooling groove, a first die-stamped converging water-cooling cover, a second die-stamped converging water-cooling cover, a first output row, a second output row, a first inlet and outlet water nozzle and a second inlet and outlet water nozzle. The top end of the winding U-shaped tube is fixedly connected to the bottom end of the die-stamped converging water-cooling groove, the top end of the first die-stamped converging water-cooling cover is welded to the first output row through holes on the first output row, the top end of the second die-stamped converging water-cooling cover is welded to the second output row through holes on the second output row, the first die-stamped converging water-cooling cover and the second die-stamped converging water-cooling cover are respectively welded to the first inlet and outlet water nozzle and the second inlet and outlet water nozzle. By updating the structure, reducing the cost, reducing the weight, improving the water cooling effect, the welding effect and the conductive effect, excellent transformer performance and transformer working efficiency are achieved, production efficiency is improved, and labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of transformer structure and manufacturing, and in particular to a transformer secondary winding and a manufacturing process thereof. Background Art

[0002] Transformer winding refers to the circuit part of the transformer, which is made of copper or aluminum wire with high conductivity and is used in power systems.

[0003] Taking the secondary winding as an example, the U-shaped copper tube is a part of the coil, and the upper U-shaped copper tube converging part is a 20mm thick copper bar to form the transformer winding. This copper bar needs to be machined and cut into shape, CNC milled, drilled, and then welded and plugged, and then welded to the U-shaped tube to form a closed water channel and transformer winding; or it can be wound with copper tubes, but the material cost of the water-cooled row is high, the machining time is long, the contact area between the water channel row and the water is small, the water cooling effect is poor, and the welding effect is not ideal due to the limitation of the welder's technical level; the output row is connected to the winding water-cooled bus by screw connection, which makes the transformer heavy, large in size, poor in water cooling effect, poor in conductivity of the welding part, low in production efficiency, and low in overcurrent utilization of the copper bar. Summary of the invention

[0004] The purpose of the invention is to provide a transformer secondary winding and its manufacturing process, by updating the structure, reducing costs, reducing weight, improving water cooling effect, welding effect, and conductive effect, to achieve excellent transformer performance and transformer working efficiency, improve production efficiency, reduce labor intensity, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A transformer secondary winding comprises a winding U-shaped tube, a die-stamped confluence water-cooling groove, a first die-stamped confluence water-cooling cover, a second die-stamped confluence water-cooling cover, a first output row, a second output row, a first inlet and outlet water nozzle, and a second inlet and outlet water nozzle, the top end of the winding U-shaped tube is fixedly connected to the bottom end of the die-stamped confluence water-cooling groove, the top of the die-stamped confluence water-cooling groove is fixedly installed with a first die-stamped confluence water-cooling cover and a second die-stamped confluence water-cooling cover, both of which are stamped from copper plates, the first die-stamped confluence water-cooling cover and the second die-stamped confluence water-cooling cover are respectively installed below the first die-stamped confluence water-cooling cover and the second die-stamped confluence water-cooling cover with a first die-stamped confluence water box cover and a second die-stamped confluence water box cover engaged with the die-stamped confluence water-cooling groove, the top of the first die-stamped confluence water-cooling cover is welded to the first output row through a hole on the first output row, the top of the second die-stamped confluence water-cooling cover is welded to the first output row through a hole on the second output row, The second output row is welded to the holes on the output row, and the second mold stamping confluence water cooling cover is also fixedly installed with a mounting plate through the mounting hole, and the first mold stamping confluence water cooling cover and the second mold stamping confluence water cooling cover are respectively welded with the first inlet and outlet water nozzles and the second inlet and outlet water nozzles bent at right angles, and the first inlet and outlet water nozzles and the second inlet and outlet water nozzles respectively pass through the first mold stamping confluence water cooling cover and the second mold stamping confluence water cooling cover, and the second inlet and outlet water nozzles are welded and connected with the second mold water-cooled confluence water box cover; positioning holes are provided on the first mold stamping confluence water cooling cover and the second mold stamping confluence water cooling cover, and the first mold stamping confluence water cooling cover and the second mold stamping confluence water cooling cover are fixedly connected with the mold stamping confluence water cooling groove through the positioning pins in the positioning holes; one end of the first inlet and outlet water nozzle passes through the circular hole provided on the first mold stamping confluence water cooling cover and is welded and connected with the first mold water-cooled confluence water box cover.

[0007] Preferably, the trapezoidal groove formed by stamping the converging water-cooling cover with the first die matches the trapezoidal protrusion formed by stamping the converging water-cooling cover with the second die.

[0008] Another technical problem to be solved by the present invention is to provide a manufacturing process of a secondary winding of a transformer, comprising the following steps:

[0009] Step 1: Put the thin-walled copper tube into the bending equipment and bend it into a winding U-shaped tube. The outlet part of the copper tube is shaped to a certain size by external punching and internal expansion, and chamfered;

[0010] Step 2: Punch the copper plate into the stamping die to stamp the whole into a concave die stamping converging water cooling groove, and punch a hole at the bottom of the die stamping converging water cooling groove;

[0011] Step 3: Put the copper plate into the stamping die to stamp out the first die stamping converging water cooling cover and the second die stamping converging water cooling cover, and punch holes on them;

[0012] Step 4: Use a stamping die to stamp the copper plate into a first die water-cooling confluence water box cover and a second die water-cooling confluence water box cover, and punch out positioning pins on them;

[0013] Step 5: Punch the thin plate into the first output row and the second output row, and punch holes on them;

[0014] Step 6: The winding U-shaped tube passes through the bottom punching hole of the die stamping converging water cooling groove and is welded;

[0015] Step 7: The mold stamping confluence water cooling groove clamps the first mold water cooling confluence water box cover and the second mold water cooling confluence water box cover, and welds the first mold stamping confluence water cooling cover and the second mold stamping confluence water cooling cover through the positioning holes and the positioning pins;

[0016] Step 8: The first mold punches the converging water cooling cover and the second mold punches the converging water cooling cover, and welds the first output row and the second output row through the positioning holes and the positioning pins;

[0017] Step nine: The mold punches out a circular hole on the converging water cooling groove at the same time, and welds it integrally with the first inlet and outlet nozzles and the second inlet and outlet nozzles.

[0018] Preferably, the welding adopts a vacuum brazing design.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The mold-stamped converging water-cooling trough of the present invention is stamped from a copper plate and connected to a winding U-shaped tube to form a winding. The integral stamping process reduces costs, improves productivity, and allows water and electricity to flow simultaneously, thereby increasing the contact area with water to achieve an excellent cooling effect.

[0021] (2) In the present invention, the top of the water-cooled cover is punched by the first die and welded to the first output row through the hole on the first output row, and the top of the water-cooled cover is punched by the second die and welded to the second output row through the hole on the second output row. The water-cooled cover part is partially punched with positioning pins, and the output row has holes that are directly vacuum welded to the water-cooled cover as a whole, so as to cool the output row, reduce the weight of the output row, reduce the cost, obtain good conductivity, eliminate contact resistance, and cool the output row. The welding is designed as vacuum brazing, which improves the welding effect, increases the conductivity of the welding point, and improves the welding productivity.

[0022] (3) The present invention punches holes on the first mold stamping converging water cooling cover, and the first inlet and outlet water nozzles and the second inlet and outlet water nozzles are directly welded to the water cooling converging water box covers of the two molds through punching holes, thereby reducing the water channel sealing part. After direct welding, epoxy resin is poured later without blocking the water channel, thereby reducing possible leakage points and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is an overall front view of the present invention;

[0025] Figure 3 It is an overall side view of the present invention;

[0026] Figure 4 It is an overall top view of the present invention;

[0027] Figure 5 It is a schematic structural diagram of a first die stamping converging water cooling cover of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the second die stamping converging water cooling cover of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the first mold water-cooling converging water box cover of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the water-cooling converging water box cover of the second mold of the present invention.

[0031] In the figure: 1 winding U-shaped tube, 2 mold stamping confluence water cooling groove, 3 first mold stamping confluence water cooling cover, 31 round hole, 4 second mold stamping confluence water cooling cover, 41 mounting hole, 5 first output row, 6 second output row, 7 first inlet and outlet nozzle, 8 second inlet and outlet nozzle, 9 mounting plate, 10 positioning hole, 11 first mold water-cooled confluence water box cover, 12 second mold water-cooled confluence water box cover. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-8 A transformer secondary winding comprises a winding U-shaped tube 1, a die-stamped converging water-cooling groove 2, a first die-stamped converging water-cooling cover 3, a second die-stamped converging water-cooling cover 4, a first output row 5, a second output row 6, a first inlet and outlet water nozzle 7 and a second inlet and outlet water nozzle 8. The winding U-shaped tube 1 is composed of a thin-walled copper tube. The specification of the copper tube can be determined according to the design power and water cooling requirements of the transformer, the winding size can be determined according to the core size, the copper tube spacing can be determined according to the size of another winding, and the water outlet part of the copper tube is shaped to a certain size by external punching and internal expansion, and chamfered to facilitate installation, and a qualified welding gap is achieved with the water-cooling groove punching.

[0034] The top end of the winding U-shaped tube 1 is fixedly connected to the bottom end of the die-stamped converging water-cooling groove 2. The die-stamped converging water-cooling groove 2 is stamped from a copper plate. The thickness of the copper plate can be determined according to the design power of the transformer and the strength requirements of the water cooling. The shape of the die-stamped converging water-cooling groove 2 can be determined according to the number of turns of the transformer winding. It is connected to the winding U-shaped tube 1 to form a winding. The whole is stamped and formed, which reduces costs, improves productivity, and uses water and electricity at the same time, increasing the contact area with water to achieve excellent cooling effect.

[0035] The top of the die-stamped confluence water-cooling groove 2 is fixedly installed with a first die-stamped confluence water-cooling cover 3 and a second die-stamped confluence water-cooling cover 4, both of which are stamped from copper plates. The thickness of the copper plate can be determined according to the design power of the transformer and the water cooling strength requirements, and the size can be determined according to the size of the die-stamped confluence water-cooling groove 2. The trapezoidal groove of the first die-stamped confluence water-cooling cover 3 matches the trapezoidal protrusion of the second die-stamped confluence water-cooling cover 4. The first die-stamped confluence water-cooling cover 3 and the second die-stamped confluence water-cooling cover 4 are arranged in parallel. The first die-stamped confluence water-cooling cover 3 and the second die-stamped confluence water-cooling cover 4 are both provided with positioning holes 10. The first die-stamped confluence water-cooling cover 3 and the second die-stamped confluence water-cooling cover 4 are fixedly connected to the die-stamped confluence water-cooling groove 2 through the positioning pins in the positioning holes 10, wherein the positioning pins are added by stamping to cooperate with the die-stamped confluence water-cooling groove 2 for positioning and output row welding positioning to form a sealed water box;The first mold stamping confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4 are respectively installed with the first mold water cooling confluence water box cover 11 and the second mold water cooling confluence water box cover 12 which are engaged with the mold stamping confluence water cooling groove 2. The first mold water cooling confluence water box cover 11 and the second mold water cooling confluence water box cover 12 cover the top of the mold stamping confluence water cooling groove 2. The first mold stamping confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4 respectively cover the first mold water cooling confluence water box cover 11 and the second mold water cooling confluence water box cover 12. The box cover 12 is pressed tightly, the top of the first die stamping converging water cooling cover 3 is welded to the first output row 5 through the hole on the first output row 5, the top of the second die stamping converging water cooling cover 4 is welded to the second output row 6 through the hole on the second output row 6, the water cooling cover part is stamped out with a positioning pin, and the holes on the output row are directly integrated with the water cooling cover for vacuum welding, so as to cool the output row, reduce the weight of the output row, reduce the cost, obtain good conductivity, eliminate contact resistance, and cool the output row. The welding is designed for vacuum brazing, which improves the welding effect and increases the conductivity of the welding point. Electrical properties, improve welding productivity, the second mold stamping confluence water cooling cover 4 is also fixedly installed with a mounting plate 9 through the mounting hole 41 to achieve the fixed installation of the entire transformer secondary winding, the first mold stamping confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4 correspond to the first inlet and outlet nozzle 7 and the second inlet and outlet nozzle 8 bent at right angles, the first inlet and outlet nozzle 7 and the second inlet and outlet nozzle 8 correspond to the first mold stamping confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4, and the second inlet and outlet nozzle 8 and the second mold water cooling confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4 are respectively welded. The box cover 12 is welded and connected, one end of the first water inlet and outlet nozzle 7 passes through the circular hole 31 opened on the first mold stamping confluence water cooling cover 3 and is welded and connected to the first mold water cooling confluence water box cover 11, and the circular hole 31 is punched on the first mold stamping confluence water cooling cover 3, and the pagoda nozzle is matched with the pagoda nozzle to achieve the required welding gap. The first water inlet and outlet nozzle 7 and the second water inlet and outlet nozzle 8 are directly welded on the two mold water cooling confluence water box covers, reducing the water channel sealing part. After direct welding, epoxy resin is poured later, and there is no need to block the water channel, reducing possible leakage points and improving production efficiency. ;

[0036] In order to better demonstrate the manufacturing process of the secondary winding of the transformer, in this embodiment, a manufacturing process of the secondary winding of the transformer includes the following steps:

[0037] Step 1: Put the thin-walled copper tube into the bending equipment and bend it into a winding U-shaped tube 1. The outlet part of the copper tube is shaped to a certain size by external punching and internal expansion, and chamfered to facilitate installation;

[0038] Step 2: Punch the copper plate into the stamping die to stamp the whole into a concave die stamping converging water cooling groove 2, and punch a hole at the bottom of the die stamping converging water cooling groove 2 for later welding and fixing;

[0039] Step 3: Put the copper plate into a stamping die to stamp out a first die stamping converging water cooling cover 3 and a second die stamping converging water cooling cover 4, and punch holes on them for later welding and fixing;

[0040] Step 4: Use a stamping die to stamp the copper plate into a first mold water-cooling confluence water box cover 11 and a second mold water-cooling confluence water box cover 12, and punch out positioning pins on them for later welding and fixing;

[0041] Step 5: Punch the thin plate into the first output row 5 and the second output row 6, and punch holes on them for later welding and fixing;

[0042] Step 6: The winding U-shaped tube 1 passes through the bottom punching hole of the die stamping converging water cooling groove 2 to reach a qualified welding gap for welding;

[0043] Step 7: The mold stamping confluence water cooling groove 2 is clamped on the first mold water cooling confluence water box cover 11 and the second mold water cooling confluence water box cover 12, and the first mold stamping confluence water cooling cover 3 and the second mold stamping confluence water cooling cover 4 are welded through the positioning hole 10 and the positioning pin;

[0044] Step 8: The first mold punches the converging water cooling cover 3 and the second mold punches the converging water cooling cover 4 to weld the first output row 5 and the second output row 6 through the positioning holes 10 and the positioning pins;

[0045] Step nine: A circular hole is punched out on the converging water cooling groove 2 by a die, and is integrally welded with the first water inlet and outlet nozzle 7 and the second water inlet and outlet nozzle 8 .

[0046] By changing the structure of the secondary winding of the transformer and its manufacturing process, the mold parts are stamped and holes or locating pins are punched on the corresponding mold parts, which are fixed by welding through the holes or locating pins. The structure is updated, the cost is reduced, the weight is reduced, the water cooling effect, the welding effect, and the conductive effect are improved, so as to achieve excellent transformer performance and transformer working efficiency, improve production efficiency, and reduce labor intensity.

[0047] In summary, the transformer secondary winding and its manufacturing process proposed by the present invention, the die stamping converging water cooling groove 2 is stamped from a copper plate, connected with the winding U-shaped tube 1 to form a winding, and the whole is stamped and formed, which reduces the cost and improves the productivity. Water and electricity are carried together, and the contact area with water is increased to achieve an excellent cooling effect; the top of the first die stamping converging water cooling cover 3 is welded to the first output row 5 through the hole on the first output row 5, and the top of the second die stamping converging water cooling cover 4 is welded to the second output row 6 through the hole on the second output row 6. The water cooling cover part is stamped with a positioning pin, and there are holes on the output row to connect with the water The cold cover is directly integrated with vacuum welding to cool the output row, reduce the weight of the output row, reduce the cost, obtain good conductivity, eliminate contact resistance, and cool the output row. The welding is designed for vacuum brazing, which improves the welding effect, increases the conductivity of the welding point, and improves the welding productivity. The first mold stamping confluence water cooling cover 3 is punched, and the first inlet and outlet water nozzles 7 and the second inlet and outlet water nozzles 8 are directly welded to the water-cooled confluence water box covers of the two molds through punching, reducing the water channel sealing part. After direct welding, epoxy resin is poured in the later stage without blocking the water channel, reducing possible leakage points, and improving production efficiency.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transformer secondary winding, comprising a winding U-shaped tube (1), a die-stamped converging water cooling groove (2), a first die-stamped converging water cooling cover (3), a second die-stamped converging water cooling cover (4), a first output row (5), a second output row (6), a first inlet and outlet water nozzle (7) and a second inlet and outlet water nozzle (8), characterized in that: The top end of the winding U-shaped tube (1) is fixedly connected to the bottom end of the die-stamped converging water cooling groove (2); the top of the die-stamped converging water cooling groove (2) is fixedly installed with a first die-stamped converging water cooling cover (3) and a second die-stamped converging water cooling cover (4) both of which are stamped from copper plates; the first die-stamped converging water cooling cover (3) and the second die-stamped converging water cooling cover (4) are respectively correspondingly installed below the first die-stamped converging water cooling cover (3) and the second die-stamped converging water cooling cover (4) and are respectively correspondingly installed with a first die-stamped converging water box cover (11) and a second die-stamped water cooling box cover (12) which are clamped on the die-stamped converging water cooling groove (2); the top of the first die-stamped converging water cooling cover (3) is welded to the first output row (5) through the hole on the first output row (5); The second output row (6) is welded to the top of the second die stamping converging water cooling cover (4) through the hole on the second output row (6); the second die stamping converging water cooling cover (4) is also fixedly mounted with a mounting plate (9) through the mounting hole (41); the first die stamping converging water cooling cover (3) and the second die stamping converging water cooling cover (4) are respectively welded with a first inlet and outlet water nozzle (7) and a second inlet and outlet water nozzle (8) bent at a right angle; the first inlet and outlet water nozzle (7) and the second inlet and outlet water nozzle (8) respectively pass through the first die stamping converging water cooling cover (3) and the second die stamping converging water cooling cover (4); the second inlet and outlet water nozzle (8) is welded and connected to the second die water cooling converging water box cover (12); The first die stamping confluence water cooling cover (3) and the second die stamping confluence water cooling cover (4) are both provided with positioning holes (10); the first die stamping confluence water cooling cover (3) and the second die stamping confluence water cooling cover (4) are fixedly connected to the die stamping confluence water cooling groove (2) via positioning pins in the positioning holes (10); one end of the first water inlet and outlet nozzle (7) passes through a circular hole (31) provided on the first die stamping confluence water cooling cover (3) and is welded to the first die water cooling confluence water box cover (11).

2. A transformer secondary winding according to claim 1, characterized in that: The trapezoidal groove formed by stamping the converging water cooling cover (3) with the first die matches the trapezoidal protrusion formed by stamping the converging water cooling cover (4) with the second die.

3. A manufacturing process for the secondary winding of a transformer according to claim 1, characterized in that: The steps include: Step 1: Place a thin-walled copper tube into a bending device and bend it into a winding U-shaped tube (1). The outlet of the copper tube is shaped to a certain size by external punching and internal expansion, and chamfered. Step 2: Punch the copper plate into a stamping die to stamp the whole into a concave die stamping converging water cooling groove (2), and punch a hole at the bottom of the die stamping converging water cooling groove (2); Step 3: placing the copper plate into a stamping die to stamp out a first die stamping converging water cooling cover (3) and a second die stamping converging water cooling cover (4), and punching holes on the top; Step 4: using a stamping die to stamp the copper plate into a first die water-cooling converging water box cover (11) and a second die water-cooling converging water box cover (12), and punching out positioning pins on them; Step 5: Punching the thin plate into a first output row (5) and a second output row (6), and punching holes thereon; Step 6: The winding U-shaped tube (1) passes through the bottom punching hole of the die stamping converging water cooling groove (2) and is welded; Step 7: The mold stamping confluence water cooling groove (2) is clamped onto the first mold water cooling confluence water box cover (11) and the second mold water cooling confluence water box cover (12), and the first mold stamping confluence water cooling cover (3) and the second mold stamping confluence water cooling cover (4) are welded through the positioning hole (10) and the positioning pin; Step 8: The first mold punches the converging water cooling cover (3) and the second mold punches the converging water cooling cover (4) to weld the first output row (5) and the second output row (6) through the positioning holes (10) and the positioning pins; Step nine: A circular hole is punched out on the converging water cooling groove (2) by a die, and is integrally welded with the first water inlet and outlet nozzle (7) and the second water inlet and outlet nozzle (8).

4. The manufacturing process of a transformer secondary winding according to claim 3, characterized in that: The welding adopts vacuum brazing design.

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