Iron core winding method and device for three-dimensional wound core transformer

Abstract

The invention relates to the technical field of transformers, in particular to an iron core winding method and device for a three-dimensional wound iron core transformer, and the device comprises a first bottom frame and a second bottom frame which are fixedly connected with each other, and further comprises a winding mechanism which is mounted on the second bottom frame, and the output end of the winding mechanism is a rotatable winding clamp; and the adjusting mechanism comprises a transverse rail fixedly connected to the first bottom frame, a movable transverse moving device is installed on the transverse rail, and the output end of the transverse moving device is fixedly connected with a mounting frame. By arranging the positioning assembly, the upper and lower special-shaped wheels of the special-shaped roller set deflect inwards by a small angle to form a V-shaped space, the steel belt can be automatically centered during conveying, and it is ensured that the steel belt is located at the center position all the time; by arranging the downward pressing assembly, the friction coefficient of the graphite block in the conveying groove in the bottom of the downward pressing plate is low, an air cushion is formed in cooperation with high-pressure air pumped by the air pump, and sliding friction between the graphite block and the steel belt is remarkably reduced when adjustable pressure is applied to the electric push rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a core winding method and device for a three-dimensional wound-core transformer. BACKGROUND

[0002] Three-dimensional wound-core is the core component of a transformer, which is formed by continuously winding silicon steel sheets or steel strips, and has a closed structure. The winding requires a guiding positioning device and a winding driving device. In the traditional technology, the guiding positioning is usually combined with a connecting rod swing mechanism and a counterweight wheel to realize the symmetric or single-side positioning of the steel strip through mechanical linkage. The function is single, manual operation is required for switching, the centering accuracy is easily affected by the width tolerance of the steel strip, and deviation is easy to occur. The winding device usually uses mechanical transmission of the rotation of the main shaft and the displacement of the box to complete the basic winding, but cannot dynamically adjust the wrap angle and the overhang section of the steel strip, resulting in tension fluctuation and affecting the winding quality.

[0003] In the prior art, a guide wheel and a connecting rod swing positioning mechanism are used to realize the basic guiding of the steel strip. In this way, the centering accuracy is insufficient, the steel strip cannot be automatically centered, the centering accuracy is low, the frictional resistance of the conveyed steel strip is large, and it is not conducive to improving the flatness and tension stability of the steel strip. A main shaft box, a worm gear and a ball screw mechanism are used to realize the rotation and displacement control of the wound core in different stages. In this way, the steel strip is not pretreated, which is not conducive to improving the flatness and tension stability of the steel strip, and the wound core winding quality is easily affected. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, such as the inability to automatically center the steel strip, the low centering accuracy, and the large frictional resistance of the conveyed steel strip, which is not conducive to improving the flatness and tension stability of the steel strip. A core winding method and device for a three-dimensional wound-core transformer are provided.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: A core winding device for a three-dimensional wound-core transformer, comprising a first bottom frame and a second bottom frame fixedly connected to each other, and further comprising: a winding mechanism, which is installed on the second bottom frame and has a rotatable winding clamp at the output end; an adjusting mechanism, which comprises a horizontal rail fixedly connected to the first bottom frame, a horizontal moving device movably installed on the horizontal rail, an installation frame fixedly connected to the output end of the horizontal moving device, a vertical rail fixedly connected to the installation frame, and a moving frame movably installed on the vertical rail; The conveying mechanism comprises a guide wheel frame connected to the moving frame and a plurality of guide assemblies, positioning assemblies and pressing-down assemblies, the steel strip to be wound passes through the guide assemblies, the positioning assemblies, the pressing-down assemblies and the guide wheel frame and is wound on the winding clamp, the pressing-down assembly comprises a pressing-down plate which is connected to the moving frame in a liftable manner, the bottom of the pressing-down plate is connected with a graphite block, the top of the graphite block is communicated with a high-pressure gas source and the bottom of the graphite block abuts against the upper surface of the steel strip.

[0006] Preferably, the winding mechanism comprises a gear device mounted on the second bottom frame and a rotatable control arm, the input end of the gear device is connected with a driving device, the output end of the gear device is connected with the winding clamp, the driving device is mounted on the second bottom frame through the frame body, the winding clamp is wound with a wound core, the output end of the control arm is rotatably connected with a pressing roller which abuts against the outer side of the wound core.

[0007] Preferably, the winding clamp comprises an inner core and four outer strips, the inner core is connected to the output end of the gear device, a plurality of fixed buckles are fixedly connected to the edge of the inner core, the plurality of fixed 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, a plurality of air guide grooves are formed through the outer strip, one end of the air guide groove close to the inner core is communicated with the reserved gap, and the other end faces the inner side of the wound core.

[0008] Preferably, the guide assembly comprises a horizontal guide part and a vertical guide part, the horizontal guide part comprises two feeding rollers rotatably connected to the moving frame, the two feeding rollers are distributed in the horizontal direction, and the steel strip passes between the two feeding rollers from bottom to top, the vertical guide part comprises two pressing rollers rotatably connected to the moving frame, the two pressing rollers are distributed in the vertical direction, and the steel strip passes between the two pressing rollers.

[0009] Preferably, the positioning assembly comprises a sliding device slidably connected to the moving frame, two parallel roller groups rotatably connected to the moving frame, and a special-shaped roller group rotatably connected to the sliding device, the special-shaped roller group is V-shaped, the V-shaped tip is rotatably connected to the edge of the steel strip, and the two parallel roller groups abut against the edge of the steel strip away from the special-shaped roller group.

[0010] Preferably, the special-shaped roller group comprises two special-shaped wheels rotatably connected to the sliding device, the two special-shaped wheels are V-shaped and correspondingly rotatably connected to the two surfaces of the steel strip at the adjacent one end, and the upper special-shaped wheel is elastic.

[0011] Preferably, the pressing-down assembly comprises two sliding rods fixedly connected to the moving frame, the same mounting plate is fixedly connected to the top end of the two sliding rods, the middle part of the two sliding rods is slidably connected to the same pressing-down plate, an electric push rod and an air pump are mounted on the mounting plate, the high-pressure gas source is the air pump, the output end of the electric push rod is fixedly connected to the pressing-down plate, the bottom of the pressing-down plate is provided with a conveying groove, the graphite block is fixedly connected to the inside of the conveying groove, the air outlet end of the air pump is communicated with a gas guide pipe, and the end of the gas guide pipe away from the air pump is communicated with the top of the conveying groove.

[0012] Preferably, the transportation groove is communicated with a plurality of oblique air outlets at both ends along the steel belt conveying direction, the plurality of oblique air outlets are symmetrically distributed about the central axis of the steel belt conveying direction, and the air outlet ends of the oblique air outlets face the steel belt edges.

[0013] Preferably, the steel belt sequentially passes through the horizontal guide part, the vertical guide part, the positioning assembly, the three pressing assemblies, the two sets of positioning assemblies and the vertical guide part, and finally is wound on the winding clamp to be wound into a wound core.

[0014] A core winding method of a three-dimensional wound core transformer, comprising the core winding device of the three-dimensional wound core transformer, and further comprising the following steps: S1, feeding guide, the steel belt forms an "S" path through the horizontal guide part to preliminarily establish tension, and is constrained in lateral position through the vertical guide part; S2, centering and calibration, the steel belt passes between the parallel roller group and the special-shaped roller group to automatically maintain centering; S3, pressing and conveying, the steel belt passes through the pressing assembly to establish winding tension, and the pressing assembly reduces friction with the steel belt through graphite blocks and air cushions; S4, conveying and correcting, the steel belt passes through the positioning assembly and the vertical guide part at the end to correct spatial posture and flatness; S5, dynamic winding, the installation frame moves horizontally as the diameter of the wound core increases, maintains the wrap angle in the range of 75°±5°, and the moving frame moves longitudinally to ensure feeding accuracy; S6, finished product taking out, opening the fixed buckle, retracting the reserved seam to enlarge the gap between the winding clamp and the wound core, and taking out the wound core.

[0015] Compared with the prior art, the advantages of the present application are that: 1, by setting the positioning assembly, the upper and lower special-shaped wheels of the special-shaped roller group are deflected inward at a small angle to form a V-shaped space, which can automatically center the steel belt during conveying, ensures that the steel belt is always in the center position, and cooperates with the parallel roller group to form double-sided cooperative limiting of the steel belt, thereby improving the centering accuracy; by setting the pressing assembly, the graphite blocks in the bottom of the pressing plate in the transportation groove have a low friction coefficient, cooperate with the high-pressure gas pumped by the air pump to form an air cushion, significantly reduce the sliding friction between the graphite blocks and the steel belt when the electric push rod applies adjustable pressure, and part of the high-pressure gas is blown out at high speed through the oblique air outlet, so that the local air pressure is reduced, the steel belt is slightly adsorbed, the shaking of the steel belt during high-speed movement is reduced, and the moving route is stabilized; different pressing plates apply different pressures to the steel belt, which is beneficial to eliminating wavy bends and establishing stable winding tension, and the flatness and tension stability of the steel belt are improved through differential pressure control.

[0016] 2、The present application is provided with a guide assembly, the horizontal guide part makes the steel strip present "S" shape path feeding, establishes tension basis and stabilizes the guide, the vertical guide part restricts the left and right position of the steel strip, prevents the lateral deviation of the steel strip, cooperates with the positioning assembly at the end and the vertical guide part, carries out flatness calibration, forms the whole process accurate guide system.

[0017] 3、The present application is provided with an adjusting mechanism, the horizontal position of the mounting frame is adjusted through the horizontal moving device, the wrap angle of the steel strip and the winding clamp during winding is stabilized at 75°±5°, effectively reduces the tension fluctuation, avoids the problem that the slip is caused by too small wrap angle or the friction resistance is increased due to too large wrap angle, and makes the suspended segment of the steel strip between the guide wheel frame and the winding clamp in a stable range, reduces vibration and material waste.

[0018] 4、The present application is provided with a modular winding clamp, the air guide groove on the surface of the winding clamp allows airflow, reduces the contact surface temperature, reduces the problem that the winding core is difficult to take out due to thermal expansion, the reserved slot is set through the fixed buckle, the reserved slot is retracted after the buckle is opened after winding is completed, the gap between the winding clamp and the winding core is increased, the winding core is taken out conveniently, the steel strip is prevented from deviating, and the quality of finished products is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a overall axonometric view of the core winding device of the three-dimensional winding core transformer.

[0020] Figure 2 It is a first bottom frame and transverse track structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0021] Figure 3 It is a feeding roller and pressure roller structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0022] Figure 4 It is a parallel roller group and special-shaped roller group structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0023] Figure 5 It is a transport groove and inclined air outlet structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0024] Figure 6 It is a driving device and gear device structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0025] Figure 7 It is a winding clamp structure schematic diagram of the core winding device of the three-dimensional winding core transformer.

[0026] In the figure: 1 first bottom frame, 2 transverse rail, 3 horizontal moving device, 4 mounting frame, 5 longitudinal rail, 6 moving frame, 7 second bottom frame, 8 control arm, 9 compression roller, 10 iron core, 11 feeding roller, 12 compression roller, 13 sliding device, 14 parallel roller set, 15 special-shaped roller set, 16 sliding rod, 17 mounting plate, 18 pressing plate, 19 electric push rod, 20 air pump, 21 air guide pipe, 22 inclined air outlet, 23 graphite block, 24 conveying groove, 25 guide wheel frame, 26 gear device, 27 driving device, 28 winding clamp, 29 air guide groove, 30 fixed buckle, 31 reserved gap. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0028] Referring to Figure 1 , Figure 2 , Figure 6 and Figure 7 , a core winding device of a three-dimensional iron core transformer comprises a first bottom frame 1 and a second bottom frame 7 fixedly connected with each other, and further comprises: A winding mechanism is installed on the second bottom frame 7, and the output end is a rotatable winding clamp 28.

[0029] The winding mechanism comprises a gear device 26 installed on the second bottom frame 7 and a rotatable control arm 8, the input end of the gear device 26 is connected with a driving device 27, the output end is connected with the winding clamp 28, the driving device 27 is fixedly installed on the second bottom frame 7 through a frame body, the winding clamp 28 is wound with the iron core 10, and the output end of the control arm 8 is rotatably connected with the compression roller 9, and the compression roller 9 abuts against the outer side of the iron core 10.

[0030] The driving device 27 and the gear device 26 are both existing technologies, the driving device 27 provides power for the gear device 26, the gear device 26 transmits power to drive the winding clamp 28 to stably rotate, and the stability during winding the iron core 10 is improved.

[0031] The winding clamp 28 comprises an inner core and four outer strips, the inner core is connected to the output end of the gear device 26, a plurality of fixed buckles 30 are fixedly connected to the edge of the inner core, the plurality of fixed buckles 30 on the same side are fixedly connected with the same outer strip, the outer strip and the inner core form a reserved gap 31 therebetween, a plurality of air guide grooves 29 are formed through the outer strip, one end of the air guide groove 29 close to the inner core is in communication with the reserved gap 31, and the other end faces the inner side of the iron core 10.

[0032] Through the modular design of the inner core and the outer strip, the reserved gap 31 is conveniently generated, ventilation and heat dissipation are performed in cooperation with the air guide groove 29, and subsequently the reserved gap 31 can be retracted to increase the gap between the winding clamp 28 and the wound iron core 10, thereby facilitating the removal of the wound iron core 10.

[0033] The adjusting mechanism comprises a transverse rail 2 fixedly connected to the first bottom frame 1, a movable transverse moving device 3 mounted on the transverse rail 2, an installation frame 4 fixedly connected to an output end of the transverse moving device 3, a longitudinal rail 5 fixedly connected to the installation frame 4, and a movable moving frame 6 mounted on the longitudinal rail 5.

[0034] The transverse moving device 3 adopts the prior art and is used to stably drive the installation frame 4 to move transversely.

[0035] With reference to Figures 2-5 The conveying mechanism comprises a guide wheel frame 25 and a plurality of guide assemblies, positioning assemblies, and pressing-down assemblies connected to the moving frame 6. The steel band to be wound passes through the guide assemblies, the positioning assemblies, the pressing-down assemblies, and the guide wheel frame 25, and is wound on the winding clamp 28. The pressing-down assembly comprises a pressing-down plate 18 connected to the moving frame 6 in a liftable manner, and a graphite block 23 connected to the bottom of the pressing-down plate 18. The top of the graphite block 23 is connected to a high-pressure gas source, and the bottom of the graphite block 23 abuts against the upper surface of the steel band.

[0036] The graphite block 23 is a block structure made of graphite material, which is loose and porous, and has a large number of small pores and channels inside. When high-pressure gas flows in, the gas can uniformly overflow through the pores to form a continuous air cushion on the surface of the graphite block 23, thereby achieving non-contact support and lubrication.

[0037] The guide assembly comprises horizontal guide components and vertical guide components. The horizontal guide components comprise two feed rollers 11 rotatably connected to the moving frame 6 and distributed in the horizontal direction. The steel band passes between the two feed rollers 11 from bottom to top. The vertical guide components comprise two pressing rollers 12 rotatably connected to the moving frame 6 and distributed in the vertical direction. The steel band passes between the two pressing rollers 12.

[0038] The positioning assembly comprises a sliding device 13 slidably connected to the moving frame 6, two parallel roller sets 14 rotatably connected to the moving frame 6, and a special-shaped roller set 15 rotatably connected to the sliding device 13. The special-shaped roller set 15 is V-shaped, with the V-shaped tip rotatably connected to the edge of the steel band. The two parallel roller sets 14 abut against the edges of the steel band away from the special-shaped roller set 15.

[0039] The special-shaped roller set 15 and the two parallel roller sets 14 form a double-side limiting effect on the steel band.

[0040] The special-shaped roller set 15 comprises two special-shaped rollers rotatably connected to the sliding device 13, the two special-shaped rollers are V-shaped, and adjacent one end of the two special-shaped rollers is correspondingly rollingly connected to the two surfaces of the steel strip.

[0041] The pressing assembly comprises two sliding rods 16 fixedly connected to the moving frame 6, the top ends of the two sliding rods 16 are fixedly connected with the same mounting plate 17, the middle parts of the two sliding rods 16 are slidably connected with the same pressing plate 18, the mounting plate 17 is provided with an electric push rod 19 and an air pump 20, the high-pressure gas source is the air pump 20, the output end of the electric push rod 19 is fixedly connected with the pressing plate 18, the bottom of the pressing plate 18 is provided with a conveying groove 24, a graphite block 23 is fixedly connected in the conveying groove 24, the air outlet end of the air pump 20 is communicated with a gas guide pipe 21, and the end, away from the air pump 20, of the gas guide pipe 21 is communicated with the top of the conveying groove 24.

[0042] The conveying groove 24 is communicated with a plurality of inclined air outlets 22 at both ends along the steel strip conveying direction, the plurality of inclined air outlets 22 are symmetrically distributed about the central axis of the steel strip conveying direction, and the air outlet end of the inclined air outlet 22 faces the edge of the steel strip.

[0043] The symmetrically distributed inclined air outlets 22 blow air to the edge of the steel strip, can form balanced air flow pressure on both sides of the steel strip, stabilize the steel strip, prevent deviation, and cooperate with the air cushion to reduce friction and improve the stability of conveying.

[0044] The steel strip sequentially passes through the horizontal guide part, the vertical guide part, the positioning assembly, the three pressing assemblies, the two groups of positioning assemblies and the vertical guide part, and the guide wheel frame 25, and is finally wound on the winding clamp 28 to be wound into the wound core 10, the pressing force of the three pressing assemblies gradually increases along the steel strip conveying direction, the wound core 10 is gradually pressed and corrected, the initial excessive pressure is avoided to cause the deformation of the steel strip, and the subsequent increasing pressure is used to gradually eliminate the wrinkles and warping defects of the steel strip, and the flatness precision and the conveying stability of the steel strip are improved.

[0045] When the present application is used, the first bottom frame 1 is provided with the transverse rail 2 and the transverse moving device 3, and the transverse position of the mounting frame 4 can be adjusted by the operation of the transverse moving device 3.

[0046] During the winding process, the diameter of the wound core 10 continuously increases, which can cause the wrap angle of the steel strip entering the winding clamp 28 to change, the wrap angle is too small to easily slip, and the wrap angle is too large to increase the friction resistance, at this time, the transverse position of the mounting frame 4 is adjusted to maintain the wrap angle in the range of 75°±5°, so that the tension fluctuation is reduced and the stability of the core winding is improved; at the same time, the mounting frame 4 is transversely moved close to the winding clamp 28 when the diameter of the wound core 10 is small at the beginning, and the mounting frame 4 is transversely moved away from the winding clamp 28 when the diameter of the wound core 10 gradually increases, so that the suspended section of the steel strip between the guide wheel frame 25 and the winding clamp 28 is effectively kept stable.

[0047] In 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, provides stable entry guide, and establishes a certain tension basis; the two vertically distributed pressure rollers 12 can accurately constrain the left and right positions of the steel strip in the horizontal plane, preventing the steel strip from deviating laterally before entering the key clamping area.

[0048] Then the steel strip enters the positioning assembly, the right side of the steel strip contacts through two parallel roller sets 14, and the left side contacts through the middle of the special-shaped roller set 15. The special-shaped roller set 15 can be adjusted in transverse position by the sliding device 13 to adapt to steel strips of different widths.

[0049] The upper and lower special-shaped rollers of the special-shaped roller set 15 are both inwardly deflected by a small angle, together forming a V-shaped space, and the upper special-shaped roller has a certain elasticity. The steel strip is guided to automatically converge to the center through the geometric characteristics of the V-shaped space, and in cooperation with the elasticity of the upper roller, a constant and soft clamping force is formed, so that the width of the steel strip within the allowable tolerance range can be stably clamped in the center of the V-shaped space, realizing accurate centering.

[0050] When the right edge of the steel strip is close to the parallel roller set 14, the left edge is automatically "gathered" to the center line by the V-shaped space of the special-shaped roller set 15, which is beneficial to eliminate the single-sided gap, and the two parallel rollers of the parallel roller set 14 rigidly limit the steel strip to form a reference track. The left special-shaped roller set 15 forms a single-point self-adaptive clamping to the steel strip, improving the positioning effect of the steel strip.

[0051] Subsequently, the steel strip enters the lower pressing assembly, the lower pressing plate 18 is slidably installed on the sliding rod 16 through a sleeve, and the electric push rod 19 works, and the output end thereof can control the up and down movement of the lower pressing plate 18.

[0052] The middle of the transport groove 24 at the bottom of the lower pressing plate 18 is provided with a graphite block 23, and the air pump 20 on the mounting plate 17 pumps high-pressure gas into the top of the transport groove 24 through the air duct 21. The high-pressure gas overflows from the bottom of the graphite block 23, forming a layer of micro air cushion between the graphite block 23 and the steel strip, which significantly reduces the sliding friction. Moreover, the graphite block 23 itself also has a very low friction coefficient, which reduces the friction while the lower pressing plate 18 cooperates with the electric push rod 19 to apply downward pressure to the steel strip.

[0053] The front and rear ends of the transport groove 24 are both provided with inclined air outlets 22. The high-speed airflow blown obliquely accelerates air flow, so that the air pressure in this area becomes smaller, producing a slight adsorption effect on the steel strip, reducing the shaking of the steel strip under high-speed movement, and improving the stability of the steel strip conveying.

[0054] Three lower plates 18 gradually increase the pressure on the steel strip, the second lower plate 18 pre-presses the steel strip to eliminate the wave bending of the steel strip, and the third lower plate 18 precisely presses the steel strip to establish a stable winding tension.

[0055] Then the steel strip passes through two groups of positioning assemblies and vertical guide components to correct the spatial posture and flatness of the steel strip, and then the steel strip moves to the winding clamp 28 with the guide wheel frame 25.

[0056] The servo motor installed in the mounting frame 4 can control the longitudinal offset of the moving frame 6 to ensure the feeding accuracy and cooperate with the subsequent device to precisely wind the steel strip.

[0057] Finally, the driving device 27 works, the power source of the driving device 27 adopts a variable frequency reduction motor, cooperates with the gear device 26 to meet the requirements of rotation speed, rotation inertia and rotation torque, drives the winding clamp 28 to stably rotate, and completes the winding of the iron core 10.

[0058] The control arm 8 adopts a cylinder control to adjust the position of the pressing roller 9, so that the pressing roller 9 stably abuts against the outside of the winding steel strip to ensure the pressing force in the winding process.

[0059] The winding clamp 28 is provided with a small air guide groove 29 on the surface and adopts a modular design. The reserved gap 31 is generated by the setting of the fixing buckle 30. The air guide groove 29 can make the airflow pass through, reduce the temperature of the contact surface between the winding clamp 28 and the steel strip, effectively avoid the problem that the iron core 10 is difficult to take out due to thermal expansion, open the fixing buckle 30 after the winding of the iron core 10 is completed, tighten the winding clamp 28 to eliminate the reserved gap 31, make the gap between the winding clamp 28 and the iron core 10 larger, facilitate taking out the iron core 10, effectively avoid the steel strip deviation of the iron core 10 in the taking-out process, and improve the finished product quality of the iron core 10.

[0060] A core winding method of a three-dimensional wound core transformer, comprising the core winding device of the three-dimensional wound core transformer, further comprising the following steps: S1, feeding guide, the steel strip passes through the horizontal guide component to form an "S" path, initially establishes tension, and is constrained in the lateral position through the vertical guide component.

[0061] S2, centering and calibration, the steel strip passes between the parallel roller group 14 and the special-shaped roller group 15 to automatically maintain the centering.

[0062] S3, lower plate conveying, the steel strip passes through the lower plate assembly to establish the winding tension, and the lower plate assembly reduces the friction with the steel strip through the graphite block 23 and the air cushion.

[0063] S4, conveying correction, the steel strip passes through the end positioning assembly and the vertical guide component to correct the spatial posture and flatness.

[0064] S5, dynamic winding, the mounting frame 4 moves horizontally with the increase of the diameter of the wound core 10, the wrapping angle is maintained in the range of 75°±5°, the moving frame 6 moves longitudinally accordingly, and the feeding accuracy is ensured.

[0065] S6, finished product taking out, the fixed buckle 30 is opened, the reserved gap 31 is retracted to enlarge the gap between the winding clamp 28 and the wound core 10, and the wound core 10 is taken out.

[0066] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A core winding device for a three-dimensional wound core transformer, comprising a first bottom frame (1) and a second bottom frame (7) fixedly connected to each other, characterized in that: Also includes: A winding mechanism, the winding mechanism is mounted on the second bottom frame (7), and the output end is a rotatable winding fixture (28); An adjustment mechanism, the adjustment mechanism comprising a transverse track (2) fixedly connected to the first bottom frame (1), a movable transverse movement device (3) being mounted on the transverse track (2), an output end of the transverse movement device (3) being fixedly connected to a mounting frame (4), a longitudinal track (5) being fixedly connected to the mounting frame (4), and a movable movement frame (6) being mounted on the longitudinal track (5); The conveying mechanism includes a guide wheel frame (25) connected to the moving frame (6) and a plurality of guide components, positioning components, and pressing components. The steel strip to be wound passes through the guide component, positioning component, pressing component, and guide wheel frame (25) and is wound on the winding fixture (28). The pressing component includes a lower pressing plate (18) connected to the moving frame (6) in a liftable manner. The bottom of the lower pressing plate (18) is connected to a graphite block (23). The top of the graphite block (23) is connected to a high-pressure gas source, and the bottom rests on the upper surface of the steel strip.

2. The core winding device of the three-dimensional wound core transformer according to claim 1, characterized in that: The winding mechanism includes a gear device (26) mounted on the second bottom frame (7) and a rotatable control arm (8), wherein the input end of the gear device (26) is connected to a driving device (27), and the output end is connected to a winding fixture (28), the driving device (27) is mounted on the second bottom frame (7) through a frame, a winding core (10) is wound on the winding fixture (28), and the output end of the control arm (8) is rotatably connected to a pressing roller (9), and the pressing roller (9) abuts against the outer side of the winding core (10).

3. The core winding device of the 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). A plurality of fixing buckles (30) are fixedly connected to the edge of the inner core. A plurality of 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. A plurality of air guide grooves (29) are provided through the outer strip. One end of the air guide groove (29) close to the inner core is connected to the reserved gap (31), and the other end faces the inner side of the winding core (10).

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

5. The core winding device of the three-dimensional wound core transformer according to claim 4, characterized in that: The positioning assembly comprises a sliding device (13) slidably connected to the moving frame (6), two parallel roller groups (14) rotatably connected to the moving frame (6), a special-shaped roller group (15) rotatably connected to the sliding device (13), the special-shaped roller group (15) being V-shaped, the V-shaped tip being rollingly connected to the edge of the steel belt, and the two parallel roller groups (14) both abut against the edge of the steel belt away from the special-shaped roller group (15).

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

7. The core winding device of the three-dimensional wound core transformer according to claim 6, characterized in that: The downward pressure component 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 downward pressure 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 downward pressure plate (18), a transport groove (24) is provided at the bottom of the downward pressure plate (18), a graphite block (23) is fixedly connected to the inside of the transport groove (24), an air outlet end of the air pump (20) is connected to an air guide pipe (21), and an 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 of the three-dimensional wound core transformer according to claim 7, characterized in that: Both ends of the transport trough (24) along the conveying direction of the steel strip are connected to a plurality of oblique air outlets (22), the plurality of oblique air outlets (22) are symmetrically distributed about the central axis of the conveying direction of the steel strip, and the air outlet ends of the oblique air outlets (22) face the edge of the steel strip.

9. The core winding device of the 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 downward pressure 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 wound core (10). The downward pressure of the three downward pressure 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 device of the three-dimensional wound core transformer according to claim 9 further comprises the following steps: S1, feeding guide, the steel strip passes through the horizontal guide component to form an "S" path, initially establishes tension, and passes through the vertical guide component to constrain the lateral position; S2, centering calibration, the steel belt passes between the parallel roller group (14) and the special-shaped roller group (15), and automatically maintains the centering; S3, downward pressure conveying, the steel strip passes through the downward pressure component to establish winding tension, and the downward pressure component reduces the friction between it and the steel strip through the graphite block (23) and the air cushion; S4, conveying correction, the steel belt passes through the positioning component and vertical guide component at the end to correct the spatial posture and flatness; S5, dynamic winding, the mounting frame (4) moves laterally as the diameter of the winding core (10) increases, maintaining the wrap angle within the range of 75°±5°, and the moving frame (6) moves longitudinally accordingly to ensure feeding accuracy; S6. The finished product is taken out, the fixing buckle (30) is opened, the reserved gap (31) is retracted, the gap between the winding fixture (28) and the coiled core (10) is expanded, and the coiled core (10) is taken out.

Images