Method for winding a core of a three-dimensional wound core transformer and device therefor

Abstract

This invention relates to the field of transformer technology, and more particularly to a method and apparatus for winding the core of a three-dimensional wound core transformer. The method includes a first base frame and a second base frame fixedly connected to each other, and further includes: a winding mechanism mounted on the second base frame, with a rotatable winding clamp at its output end; and an adjustment mechanism including a transverse rail fixedly connected to the first base frame, a movable lateral movement device mounted on the transverse rail, and an installation frame fixedly connected to the output end of the lateral movement device. This invention utilizes a positioning component, where the upper and lower irregularly shaped wheels of the irregularly shaped roller assembly deflect inward at a small angle to form a V-shaped space, automatically centering the steel strip during transport and ensuring the steel strip remains centered. Furthermore, by setting up a pressure component, the graphite blocks in the transport groove at the bottom of the pressure plate have a low coefficient of friction, which, combined with the high-pressure gas pumped in by the air pump, forms an air cushion, significantly reducing the sliding friction between the graphite blocks and the steel strip when the electric push rod applies adjustable pressure.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a method and apparatus for winding the core of a three-dimensional wound core transformer. Background Technology

[0002] The three-dimensional wound core is the core component of a transformer. It is formed by continuous and uninterrupted winding of silicon steel sheets or strips and has a closed structure. Its winding requires the cooperation of a guiding and positioning device and a winding drive device. In traditional technology, the guiding and positioning often adopts a combination of a linkage swing mechanism and a counterweight wheel. The symmetrical or unilateral positioning of the steel strip is achieved through mechanical linkage. The function is limited, and switching requires manual operation. The centering accuracy is easily affected by the width tolerance of the steel strip and is prone to deviation. The winding device usually uses mechanical transmission of spindle rotation and box displacement to complete basic winding, but it cannot dynamically adjust the wrap angle and suspension section of the steel strip, resulting in tension fluctuations, which can easily affect the winding quality.

[0003] Existing technologies employ a guide wheel and connecting rod swing positioning mechanism to guide the steel strip material. However, this method relies on manual switching of the guiding mode, resulting in insufficient centering accuracy and an inability to automatically center the steel strip. Furthermore, the high frictional resistance of the conveyed steel strip hinders the improvement of its flatness and tension stability. Another approach uses a spindle box, worm gear reducer, and ball screw mechanism to control the rotation and displacement of the core at different stages. However, this method lacks pre-treatment of the steel strip, which negatively impacts its flatness and tension stability and can easily affect the winding quality of the core. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to automatically center the steel strip, low centering accuracy, and high frictional resistance in conveying the steel strip, which are detrimental to improving the flatness and tension stability of the steel strip. Therefore, this invention proposes a method and apparatus for winding the core of a three-dimensional wound core transformer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A core winding device for a three-dimensional wound core transformer includes a first base frame and a second base frame fixedly connected to each other, and further includes:

[0007] The winding mechanism is mounted on the second bottom frame, and its output end is a rotatable winding clamp.

[0008] The adjustment mechanism includes a transverse rail fixedly connected to the first base frame, a movable transverse moving device mounted on the transverse rail, a mounting frame fixedly connected to the output end of the transverse moving device, a longitudinal rail fixedly connected to the mounting frame, and a movable moving frame mounted on the longitudinal rail.

[0009] The conveying mechanism includes a guide wheel frame connected to the moving frame and multiple guide components, positioning components, and pressing components. The steel strip to be wound passes through the guide components, positioning components, pressing components, and guide wheel frame and is wound onto the winding fixture. The pressing component includes a pressing plate that is vertically connected to the moving frame. A graphite block is connected to the bottom of the pressing plate. The top of the graphite block is connected to a high-pressure air source, and the bottom of the graphite block abuts against the upper surface of the steel strip.

[0010] Preferably, the winding mechanism includes a gear device and a rotatable control arm mounted on the second base frame. The input end of the gear device is connected to a drive device, and the output end is connected to a winding fixture. The drive device is mounted on the second base frame via a frame. A coiled iron core is wound on the winding fixture. The output end of the control arm is rotatably connected to a clamping roller, which abuts against the outer side of the coiled iron core.

[0011] Preferably, the winding fixture includes an inner core and four outer strips. The inner core is connected to the output end of the gear device. Multiple fixing buckles are fixedly connected to the edge of the inner core. Multiple fixing buckles on the same side are fixedly connected to the same outer strip. A reserved gap is formed between the outer strip and the inner core. Multiple air guide grooves are opened through the outer strip. One end of the air guide groove near the inner core is connected to the reserved gap, and the other end faces the inside of the winding core.

[0012] Preferably, the guiding assembly includes a horizontal guiding component and a vertical guiding component. The horizontal guiding component includes two feed rollers rotatably connected to the movable frame. The two feed rollers are distributed in a horizontal direction, and the steel strip passes between the two feed rollers from bottom to top. The vertical guiding component includes two pressure rollers rotatably connected to the movable frame. The two pressure rollers are distributed in a vertical direction, and the steel strip passes between the two pressure rollers.

[0013] Preferably, the positioning component includes a sliding device slidably connected to the moving frame and two parallel roller groups rotatably connected to the moving frame. A V-shaped roller group is rotatably connected to the sliding device, with the V-shaped tip rollingly connected to the edge of the steel strip. Both parallel roller groups abut against the edge of the steel strip away from the V-shaped roller group.

[0014] Preferably, the irregular roller assembly includes two irregularly shaped wheels rotatably connected to the sliding device. The two irregularly shaped wheels are V-shaped, and their adjacent ends are correspondingly rotatably connected to the two sides of the steel belt. The upper irregularly shaped wheel is elastic.

[0015] Preferably, the pressing assembly includes two sliding rods fixedly connected to the movable frame. The top ends of the two sliding rods are fixedly connected to the same mounting plate, and the middle parts are slidably connected to the same pressing plate. An electric push rod and an air pump are mounted on the mounting plate. The high-pressure air source is the air pump. The output end of the electric push rod is fixedly connected to the pressing plate. A transport groove is opened at the bottom of the pressing plate. A graphite block is fixedly connected inside the transport groove. The air outlet end of the air pump is connected to an air guide pipe. The end of the air guide pipe away from the air pump is connected to the top of the transport groove.

[0016] Preferably, the conveying trough is connected to multiple oblique air outlets at both ends along the conveying direction of the steel belt. The multiple oblique air outlets are symmetrically distributed about the central axis of the conveying direction of the steel belt, and the air outlet ends of the oblique air outlets face the edge of the steel belt.

[0017] Preferably, the steel strip passes sequentially through a horizontal guide component, a vertical guide component, a positioning component, three pressing components, two sets of positioning components and a vertical guide component, and a guide wheel frame, and is finally wound onto a winding fixture to form a coiled iron core. The downward pressure of the three pressing components gradually increases along the conveying direction of the steel strip.

[0018] A method for winding the core of a three-dimensional wound core transformer, comprising the aforementioned three-dimensional wound core transformer core winding device, and further comprising the following steps:

[0019] S1. Feeding guidance: The steel strip forms an "S" path through the horizontal guide component, initially establishing tension, and then constrains the lateral position through the vertical guide component.

[0020] S2. Alignment and calibration: The steel belt automatically maintains alignment as it passes between the parallel roller group and the irregular roller group.

[0021] S3. Downward conveying: The steel belt passes through the downward conveying assembly to establish winding tension. The downward conveying assembly reduces friction between itself and the steel belt through graphite blocks and air cushions.

[0022] S4. Conveying and straightening: The steel belt passes through the positioning component and vertical guide component at the end to straighten the spatial posture and flatness.

[0023] S5. Dynamic winding: The mounting frame moves laterally as the diameter of the coiled iron core increases, maintaining the wrap angle within the range of 75°±5°. The moving frame moves longitudinally accordingly to ensure feeding accuracy.

[0024] S6. Remove the finished product, open the fixing buckle, retract the reserved gap to widen the gap between the winding fixture and the coiled iron core, and remove the coiled iron core.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] 1. This invention, by setting up a positioning component, allows the upper and lower irregularly shaped wheels of the irregularly shaped roller assembly to deflect inward at a small angle to form a V-shaped space. During conveying, this automatically centers the steel belt, ensuring that the steel belt is always in the center position. It also works with the parallel roller assembly to form a bilateral cooperative limit on the steel belt, improving the centering accuracy. By setting up a pressing component, the graphite blocks in the transport groove at the bottom of the pressing plate have a low coefficient of friction. Combined with the high-pressure gas pumped in by the air pump, they form an air cushion. When the electric push rod applies adjustable pressure, it significantly reduces the sliding friction between the graphite blocks and the steel belt. At the same time, some of the high-pressure gas is blown out at high speed through the oblique air outlet, which reduces the local air pressure and slightly adsorbs the steel belt, reducing the shaking of the steel belt when it moves at high speed and stabilizing the movement path. Different pressing plates apply different pressures to the steel belt, which helps to eliminate wavy bends and establish stable winding tension. Differentiated pressure control improves the flatness and tension stability of the steel belt.

[0027] 2. This invention sets up a guiding component, which guides the steel strip to feed in an "S" shaped path through a horizontal guiding component, establishes a tension foundation and stabilizes the guide, and constrains the left and right position of the steel strip through a vertical guiding component to prevent the steel strip from shifting laterally. In conjunction with the positioning component at the end and the vertical guiding component, flatness calibration is performed to form a precise guiding system throughout the entire process.

[0028] 3. By setting an adjustment mechanism and adjusting the lateral position of the mounting frame through a transverse movement device, the present invention stabilizes the wrap angle between the steel strip and the winding fixture at 75°±5° during the winding process, effectively reducing tension fluctuations and avoiding slippage caused by an excessively small wrap angle or increased frictional resistance caused by an excessively large wrap angle. At the same time, it keeps the suspended section of the steel strip between the guide wheel frame and the winding fixture within a stable range, reducing vibration and material waste.

[0029] 4. This invention uses a modular winding fixture with air guide grooves on the surface to allow airflow, reducing the temperature of the contact surface and minimizing the difficulty in removing the core due to thermal expansion. A pre-reserved gap is provided by a fixing buckle; after winding, opening the buckle causes the pre-reserved gap to retract, increasing the gap between the winding fixture and the core, facilitating core removal and preventing steel strip misalignment, thus ensuring product quality. Attached Figure Description

[0030] Figure 1 This is an overall isometric view of the core winding device for a three-dimensional core transformer proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the first bottom frame and the transverse track structure of a core winding device for a three-dimensional core transformer proposed in this invention.

[0032] Figure 3 This is a schematic diagram of the feed roller and pressure roller structure of a core winding device for a three-dimensional core transformer proposed in this invention.

[0033] Figure 4This is a schematic diagram of the parallel roller group and the irregular roller group structure of the core winding device for a three-dimensional wound core transformer proposed in this invention.

[0034] Figure 5 This is a schematic diagram of the transport trough and oblique air outlet structure of the core winding device for a three-dimensional wound core transformer proposed in this invention.

[0035] Figure 6 This is a schematic diagram of the drive device and gear device of the core winding device for a three-dimensional wound core transformer proposed in this invention.

[0036] Figure 7 This is a schematic diagram of the winding fixture structure of a three-dimensional wound core transformer core winding device proposed in this invention.

[0037] In the diagram: 1 First base frame, 2 Horizontal track, 3 Lateral movement device, 4 Mounting frame, 5 Longitudinal track, 6 Moving frame, 7 Second base frame, 8 Control arm, 9 Pressing roller, 10 Coil core, 11 Feed roller, 12 Pressure roller, 13 Sliding device, 14 Parallel roller group, 15 Irregular roller group, 16 Sliding rod, 17 Mounting plate, 18 Lower pressure plate, 19 Electric push rod, 20 Air pump, 21 Air guide pipe, 22 Angled air outlet, 23 Graphite block, 24 Transport trough, 25 Guide wheel frame, 26 Gear device, 27 Drive device, 28 Winding clamp, 29 Air guide groove, 30 Fixing buckle, 31 Reserved gap. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 A core winding device for a three-dimensional wound core transformer includes a first base frame 1 and a second base frame 7 fixedly connected to each other, and further includes:

[0040] The winding mechanism is mounted on the second bottom frame 7, and its output end is a rotatable winding clamp 28.

[0041] The winding mechanism includes a gear device 26 mounted on the second base frame 7 and a rotatable control arm 8. The input end of the gear device 26 is connected to a drive device 27, and the output end is connected to a winding fixture 28. The drive device 27 is fixedly mounted on the second base frame 7 via a frame. A coiled iron core 10 is wound on the winding fixture 28. The output end of the control arm 8 is rotatably connected to a pressing roller 9, which abuts against the outside of the coiled iron core 10.

[0042] Both the drive device 27 and the gear device 26 adopt existing technologies. The drive device 27 provides power to the gear device 26, and the gear device 26 transmits power to drive the winding fixture 28 to rotate stably, thereby improving the stability when winding the core 10.

[0043] The winding fixture 28 includes an inner core and four outer strips. The inner core is connected to the output end of the gear device 26. Multiple fixing buckles 30 are fixedly connected to the edge of the inner core. Multiple fixing buckles 30 on the same side are fixedly connected to the same outer strip. A reserved gap 31 is formed between the outer strip and the inner core. Multiple air guide grooves 29 are opened through the outer strip. One end of the air guide groove 29 near the inner core is connected to the reserved gap 31, and the other end faces the inside of the winding core 10.

[0044] The modular design of the inner core and outer strip facilitates the generation of the reserved slot 31, which, together with the air guide 29, provides ventilation and heat dissipation. The reserved slot 31 can be retracted later to increase the gap between the winding clamp 28 and the coiled iron core 10, making it easier to remove the coiled iron core 10.

[0045] The adjustment mechanism includes a transverse rail 2 fixedly connected to the first base frame 1, a movable transverse moving device 3 installed on the transverse rail 2, a mounting frame 4 fixedly connected to the output end of the transverse moving device 3, a longitudinal rail 5 fixedly connected to the mounting frame 4, and a movable moving frame 6 installed on the longitudinal rail 5.

[0046] The lateral movement device 3 uses existing technology to stably drive the mounting frame 4 to move laterally.

[0047] Reference Figures 2-5 The conveying mechanism includes a guide wheel frame 25 connected to the movable frame 6 and multiple guide components, positioning components, and pressing components. The steel strip to be wound passes through the guide components, positioning components, pressing components and guide wheel frame 25 and is wound on the winding fixture 28. The pressing component includes a pressing plate 18 that is vertically connected to the movable frame 6. A graphite block 23 is connected to the bottom of the pressing plate 18. The top of the graphite block 23 is connected to a high-pressure air source and the bottom abuts against the upper surface of the steel strip.

[0048] Graphite block 23 is a block structure made of graphite material. It has a loose and porous texture with a large number of tiny pores and channels inside. When a high-pressure airflow is pumped in, the gas can overflow evenly through these pores, forming a continuous air cushion on the surface of graphite block 23, achieving non-contact support and lubrication.

[0049] The guiding assembly includes a horizontal guiding component and a vertical guiding component. The horizontal guiding component includes two feed rollers 11 rotatably connected to the movable frame 6. The two feed rollers 11 are distributed in the horizontal direction, and the steel strip passes between the two feed rollers 11 from bottom to top. The vertical guiding component includes two pressure rollers 12 rotatably connected to the movable frame 6. The two pressure rollers 12 are distributed in the vertical direction, and the steel strip passes between the two pressure rollers 12.

[0050] The positioning assembly includes a sliding device 13 slidably connected to the movable frame 6 and two parallel roller groups 14 rotatably connected to the movable frame 6. A shaped roller group 15 is rotatably connected to the sliding device 13. The shaped roller group 15 is V-shaped, and the V-shaped tip is rolled and connected to the edge of the steel strip. Both parallel roller groups 14 abut against the edge of the steel strip away from the shaped roller group 15.

[0051] The irregular roller assembly 15 and the two parallel roller assemblies 14 form a double-sided limiting effect on the steel belt.

[0052] The irregular roller assembly 15 includes two irregularly shaped wheels rotatably connected to the sliding device 13. The two irregularly shaped wheels are V-shaped, and their adjacent ends are correspondingly rotatably connected to the two sides of the steel belt. The upper irregularly shaped wheel is elastic, so it can adapt to steel belts of different thicknesses.

[0053] The pressing assembly includes two sliding rods 16 fixedly connected to the movable frame 6. The top ends of the two sliding rods 16 are fixedly connected to the same mounting plate 17, and the middle parts are slidably connected to the same pressing plate 18. An electric push rod 19 and an air pump 20 are installed on the mounting plate 17. The high-pressure air source is the air pump 20. The output end of the electric push rod 19 is fixedly connected to the pressing plate 18. A transport groove 24 is opened at the bottom of the pressing plate 18. A graphite block 23 is fixedly connected inside the transport groove 24. The air outlet end of the air pump 20 is connected to an air guide pipe 21. The end of the air guide pipe 21 away from the air pump 20 is connected to the top of the transport groove 24.

[0054] Multiple oblique air outlets 22 are connected to both ends of the transport trough 24 along the steel belt conveying direction. The multiple oblique air outlets 22 are symmetrically distributed about the central axis of the steel belt conveying direction, and the air outlet end of the oblique air outlet 22 faces the edge of the steel belt.

[0055] The symmetrically distributed oblique air outlets 22 blow air towards the edge of the steel belt, which can form a balanced airflow pressure on both sides of the steel belt, stabilize the steel belt, prevent deviation, and at the same time reduce friction and improve the smoothness of conveying with the air cushion.

[0056] The steel strip passes sequentially through a horizontal guide component, a vertical guide component, a positioning component, three pressing components, two sets of positioning components and vertical guide components, and a guide wheel frame 25, and is finally wound onto a winding fixture 28 to form a coiled iron core 10. The downward pressure of the three pressing components gradually increases along the conveying direction of the steel strip, realizing progressive compression and correction of the steel strip. This avoids deformation of the steel strip due to excessive initial pressure, and gradually eliminates wrinkles and warping defects of the steel strip through subsequent increasing pressure, thereby improving the flatness accuracy and conveying stability of the steel strip.

[0057] When this invention is used, a transverse track 2 and a transverse movement device 3 are installed on the first bottom frame 1. The transverse movement device 3 can adjust the transverse position of the mounting frame 4.

[0058] During the winding process, the diameter of the core 10 continuously increases, which causes the wrap angle of the steel strip entering the winding clamp 28 to change. If the wrap angle is too small, it is easy to slip, while if the wrap angle is too large, it will increase the frictional resistance. At this time, by adjusting the lateral position of the mounting frame 4, the wrap angle is maintained within the range of 75°±5°, so as to reduce the tension fluctuation and improve the stability of the core winding. At the same time, when the diameter of the core 10 is small at the beginning, the mounting frame 4 moves laterally closer to the winding clamp 28. As the diameter of the core 10 gradually increases, the mounting frame 4 also moves laterally away from the winding clamp 28, effectively keeping the steel strip stable in the suspended section between the guide wheel frame 25 and the winding clamp 28.

[0059] During the winding operation, the steel strip passes through two horizontally distributed feed rollers 11 from bottom to top, and then passes through the middle of two vertically distributed pressure rollers 12, so that the steel strip forms a preliminary "S" shaped path, providing stable entry guidance and establishing a certain tension foundation; the two vertically distributed pressure rollers 12 can precisely constrain the left and right position of the steel strip in the horizontal plane, preventing the steel strip from shifting laterally before entering the critical clamping area.

[0060] Then the steel strip enters the positioning assembly. The right side of the steel strip contacts and passes through the two parallel roller groups 14, and the left side contacts and passes through the middle of the irregular roller group 15. The irregular roller group 15 can be adjusted laterally by the sliding device 13 to accommodate steel strips of different widths.

[0061] The upper and lower irregular rollers of the irregular roller assembly 15 are both deflected inward at a small angle to form a V-shaped space. The upper irregular roller has a certain degree of elasticity. Through the geometric characteristics of the V-shaped space, the steel belt is guided to automatically move towards the center. Combined with the elasticity of the upper roller, a constant and gentle clamping force is formed, so that the width of the steel belt can be stably clamped in the center of the V-shaped space within the allowable tolerance range, thus achieving precise centering.

[0062] When the right edge of the steel strip is in close contact with the parallel roller group 14, the left edge is automatically "gathered" to the center line by the V-shaped space of the irregular roller group 15, which helps to eliminate the gap on one side. The two parallel wheels that make up the parallel roller group 14 rigidly limit the steel strip and form a reference track. The irregular roller group 15 on the left side forms a single-point adaptive clamping of the steel strip, which improves the positioning effect of the steel strip.

[0063] The steel strip then enters the pressing assembly, and the pressing plate 18 is slidably mounted on the sliding rod 16 through the sleeve. The electric push rod 19 operates, and its output end can control the pressing plate 18 to move up and down.

[0064] A graphite block 23 is provided in the middle of the bottom transport groove 24 of the lower pressure plate 18. The air pump 20 on the mounting plate 17 pumps high-pressure gas into the top of the transport groove 24 through the air guide pipe 21. The high-pressure gas overflows from the bottom of the graphite block 23, forming a tiny air cushion between the graphite block 23 and the steel strip, which significantly reduces the sliding friction. In addition, the graphite block 23 itself also has an extremely low coefficient of friction, which reduces the friction while the lower pressure plate 18 and the electric push rod 19 apply downward pressure to the steel strip.

[0065] The front and rear ends of the transport trough 24 are equipped with oblique air outlets 22. The high-speed airflow blown out at an angle accelerates the air flow, reduces the air pressure in the area, and produces a slight adsorption effect on the steel belt, reducing the shaking of the steel belt under high-speed movement and improving the stability of the steel belt conveyor.

[0066] The downward pressure of the three lower pressure plates 18 on the steel strip gradually increases. The second lower pressure plate 18 pre-tightens the steel strip to eliminate the wavy bends of the steel strip, and the third lower pressure plate 18 finely tightens the steel strip to establish a stable winding tension.

[0067] Subsequently, the steel strip passes through two sets of positioning components and vertical guide components to correct its spatial posture and flatness. Then, the steel strip moves along the guide wheel frame 25 to the winding fixture 28.

[0068] The mounting frame 4 is equipped with a servo motor, which can control the longitudinal offset of the moving frame 6 to ensure feeding accuracy and cooperate with subsequent devices to accurately wind the steel strip.

[0069] Finally, the drive device 27 operates. The power source of the drive device 27 is a variable frequency reduction motor, which, together with the gear device 26, meets the requirements of rotational speed, rotational inertia and rotational torque, driving the winding fixture 28 to rotate stably and complete the winding of the iron core 10.

[0070] The control arm 8 is controlled by a cylinder to adjust the position of the clamping roller 9, so that the clamping roller 9 is stably pressed against the outside of the steel strip during winding, ensuring the clamping force during the winding process.

[0071] The surface of the winding jig 28 is provided with small air guide grooves 29 and adopts a modular design. The reserved gap 31 is generated by the setting of the fixing buckle 30. The air guide groove 29 allows airflow to pass through, reducing the temperature of the contact surface between the winding jig 28 and the steel strip. This effectively avoids the problem of thermal expansion causing difficulty in removing the coiled iron core 10. After the coiled iron core 10 is wound, the fixing buckle 30 is opened and the winding jig 28 is tightened to eliminate the reserved gap 31, making the gap between the winding jig 28 and the coiled iron core 10 larger, which facilitates the removal of the coiled iron core 10. This effectively prevents the steel strip from shifting during the removal of the coiled iron core 10 and improves the finished product quality of the coiled iron core 10.

[0072] A method for winding the core of a three-dimensional wound core transformer, comprising the aforementioned three-dimensional wound core transformer core winding device, and further comprising the following steps:

[0073] S1. Feeding guidance: The steel strip forms an "S" path through the horizontal guide component, initially establishing tension, and then constrains the lateral position through the vertical guide component.

[0074] S2. Alignment and calibration: The steel belt passes between the parallel roller group 14 and the irregular roller group 15 and automatically maintains alignment.

[0075] S3, downward conveying: the steel belt passes through the downward conveying assembly to establish winding tension. The downward conveying assembly reduces friction between itself and the steel belt through graphite block 23 and air cushion.

[0076] S4. Conveying and straightening: The steel belt passes through the positioning component and vertical guide component at the end to straighten the spatial posture and flatness.

[0077] S5. Dynamic winding: The mounting frame 4 moves laterally as the diameter of the coiled core 10 increases, maintaining the wrap angle within the range of 75°±5°. The moving frame 6 moves longitudinally accordingly to ensure feeding accuracy.

[0078] S6. Remove the finished product, open the fixing buckle 30, retract the reserved gap 31 to expand the gap between the winding clamp 28 and the coiled iron core 10, and remove the coiled iron core 10.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A core winding device for a three-dimensional wound core transformer, comprising a first base frame (1) and a second base frame (7) fixedly connected to each other, characterized in that, Also includes: The winding mechanism is mounted on the second bottom frame (7) and the output end is a rotatable winding clamp (28). The adjustment mechanism includes a transverse rail (2) fixedly connected to the first bottom frame (1), a movable transverse moving device (3) is installed on the transverse rail (2), the output end of the transverse moving device (3) is fixedly connected to a mounting frame (4), a longitudinal rail (5) is fixedly connected to the mounting frame (4), and a movable moving frame (6) is installed on the longitudinal rail (5). The conveying mechanism includes a guide wheel frame (25) connected to the movable frame (6) and multiple guide components, positioning components, and pressing components. The steel strip to be wound passes through the guide components, positioning components, pressing components and guide wheel frame (25) and is wound on the winding fixture (28). The pressing component includes a pressing plate (18) that is vertically connected to the movable frame (6). A graphite block (23) is connected to the bottom of the pressing plate (18). The top of the graphite block (23) is connected to a high-pressure air source and the bottom abuts against the upper surface of the steel strip.

2. The core winding device for a three-dimensional wound core transformer according to claim 1, characterized in that, The winding mechanism includes a gear device (26) mounted on the second base frame (7) and a rotatable control arm (8). The input end of the gear device (26) is connected to a drive device (27), and the output end is connected to a winding fixture (28). The drive device (27) is mounted on the second base frame (7) through a frame. A coiled iron core (10) is wound on the winding fixture (28). The output end of the control arm (8) is rotatably connected to a pressing roller (9), which abuts against the outside of the coiled iron core (10).

3. The core winding device for a three-dimensional wound core transformer according to claim 2, characterized in that, The winding fixture (28) includes an inner core and four outer strips. The inner core is connected to the output end of the gear device (26). Multiple fixing buckles (30) are fixedly connected to the edge of the inner core. Multiple fixing buckles (30) on the same side are fixedly connected to the same outer strip. A reserved gap (31) is formed between the outer strip and the inner core. Multiple air guide grooves (29) are opened through the outer strip. One end of the air guide groove (29) near the inner core is connected to the reserved gap (31), and the other end faces the inside of the winding core (10).

4. The core winding device for a three-dimensional wound core transformer according to claim 3, characterized in that, The guiding assembly includes a horizontal guiding component and a vertical guiding component. The horizontal guiding component includes two feed rollers (11) rotatably connected to the movable frame (6). The two feed rollers (11) are distributed in the horizontal direction, and the steel strip passes between the two feed rollers (11) from bottom to top. The vertical guiding component includes two pressure rollers (12) rotatably connected to the movable frame (6). The two pressure rollers (12) are distributed in the vertical direction, and the steel strip passes between the two pressure rollers (12).

5. The core winding device for a three-dimensional wound core transformer according to claim 4, characterized in that, The positioning assembly includes a sliding device (13) slidably connected to the movable frame (6) and two parallel roller groups (14) rotatably connected to the movable frame (6). A shaped roller group (15) is rotatably connected to the sliding device (13). The shaped roller group (15) is V-shaped, and the V-shaped tip is rolled and connected to the edge of the steel strip. Both parallel roller groups (14) abut against the edge of the steel strip away from the shaped roller group (15).

6. The core winding device for a three-dimensional wound core transformer according to claim 5, characterized in that, The irregular roller assembly (15) includes two irregular wheels rotatably connected to the sliding device (13). The two irregular wheels are V-shaped, and their adjacent ends are rotatably connected to the two sides of the steel belt. The upper irregular wheel is elastic.

7. The core winding device for a three-dimensional wound core transformer according to claim 6, characterized in that, The pressing assembly includes two sliding rods (16) fixedly connected to the movable frame (6). The top of the two sliding rods (16) is fixedly connected to the same mounting plate (17), and the middle is slidably connected to the same pressing plate (18). An electric push rod (19) and an air pump (20) are installed on the mounting plate (17). The high-pressure air source is the air pump (20). The output end of the electric push rod (19) is fixedly connected to the pressing plate (18). A transport groove (24) is opened at the bottom of the pressing plate (18). A graphite block (23) is fixedly connected inside the transport groove (24). The air outlet of the air pump (20) is connected to an air guide pipe (21). The end of the air guide pipe (21) away from the air pump (20) is connected to the top of the transport groove (24).

8. The core winding device for a three-dimensional wound core transformer according to claim 7, characterized in that, The transport trough (24) has multiple oblique air outlets (22) connected to both ends along the steel belt conveying direction. The multiple oblique air outlets (22) are symmetrically distributed about the central axis of the steel belt conveying direction, and the air outlets (22) face the edge of the steel belt.

9. The core winding device for a three-dimensional wound core transformer according to claim 8, characterized in that, The steel strip passes through the horizontal guide component, the vertical guide component, the positioning component, the three pressing components, the two sets of positioning components and the vertical guide component, and the guide wheel frame (25) in sequence, and is finally wound on the winding fixture (28) to form a coiled iron core (10). The downward pressure of the three pressing components gradually increases along the conveying direction of the steel strip.

10. A method for winding the core of a three-dimensional wound core transformer, characterized in that, The core winding apparatus for the three-dimensional wound core transformer as described in claim 9 further includes the following steps: S1. Feeding guidance: The steel strip forms an "S" path through the horizontal guide component, initially establishing tension, and then constrains the lateral position through the vertical guide component. S2. Centering and calibration: The steel belt passes between the parallel roller group (14) and the irregular roller group (15) and automatically maintains centering; S3, downward conveying, the steel belt passes through the downward conveying assembly to establish winding tension, the downward conveying assembly reduces its friction with the steel belt through graphite block (23) and air cushion; S4. Conveying and straightening: The steel belt passes through the positioning component and vertical guide component at the end to straighten the spatial posture and flatness. S5. Dynamic winding: The mounting frame (4) moves laterally as the diameter of the coiled iron core (10) increases, maintaining the wrap angle within the range of 75°±5°. The moving frame (6) moves longitudinally accordingly to ensure feeding accuracy. S6. Take out the finished product, open the fixing buckle (30), retract the reserved gap (31) to expand the gap between the winding clamp (28) and the coiled iron core (10), and take out the coiled iron core (10).

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