A kind of dry-type transformer long circular coil winding wire springback control device

Abstract

The application relates to the technical field of dry-type transformer coil manufacturing, in particular to a dry-type transformer long circular coil winding wire rebound control device which is arranged between a wire unwinding device and a winding machine main shaft and comprises a mounting support assembly and a rebound suppression mechanism; the rebound suppression mechanism comprises a movable bearing part, a guide assembly and an elastic pressure applying part, the movable bearing part is rotatably or movably mounted on the mounting support assembly, the guide assembly is arranged on the movable bearing part and defines a constraint path for the wire to pass through; the elastic pressure applying part is configured to apply an elastic biasing force to the movable bearing part, so that the guide assembly keeps abutting against the wire and limits the rebound arching direction of the wire during wire conveying. The application has the effects of reducing layer gap, reducing wire material waste, being beneficial to controlling the radial size and insulation space of the long circular coil, improving the winding quality and size consistency of the dry-type transformer coil.

Description

Technical Field

[0001] This application relates to the technical field of dry-type transformer coil manufacturing, and in particular to a wire springback control device for winding long round coils of dry-type transformers. Background Technology

[0002] The coil of a dry-type transformer is a crucial component, and its winding quality directly affects the transformer's dimensions, insulation performance, heat dissipation performance, and operational reliability. For long circular coils, their overall shape typically includes relatively straight segments and arc segments connecting the two ends of the straight segments. During the winding process, the conductors must be tightly fitted along the outer contour of the coil mold or the previous layer of conductors to ensure a compact interlayer structure, stable dimensions, and insulation space that meets design requirements.

[0003] In existing long circular coil winding processes, the conductor is typically led out by a pay-off device and wound onto a coil mold or pre-wound coil layer under the traction of the winding machine's spindle. Since the conductor is usually stored in a coiled state, it possesses inherent bending memory and internal stress. Simultaneously, during pay-off, tensioning, and winding, the conductor is also affected by tension fluctuations, changes in the transport path, and changes in force at the transition points between the straight and curved sections of the long circular coil. This causes the conductor to easily spring back and arch before entering the winding area or during the winding process. Existing methods often rely on external force pressing, temporary guidance, or simply increasing tension to improve conductor adhesion. However, external force pressing results in poor consistency and high labor intensity, while simply increasing tension may damage the conductor insulation layer, deform the conductor, or increase equipment load, making it difficult to reliably solve the conductor springback problem.

[0004] After the conductor springs back and arches, it becomes difficult to form a tight fit between the conductor and the coil surface, easily creating gaps between coil layers. This increases the actual winding length and wastes conductor material. Simultaneously, the loose interlayer spacing leads to an increase in the coil's radial dimension, which in turn compresses the outer insulation space or affects the insulation structure arrangement, reducing coil dimensional consistency and product quality stability. Therefore, there is an urgent need for a conductor springback control device that can be installed between the pay-off device and the winding machine spindle to continuously constrain and correct the conductor springback direction before the conductor enters the winding area, in order to improve the winding quality of long circular coils in dry-type transformers. Summary of the Invention

[0005] In order to solve the technical problems in the prior art that the conductor cannot be tightly attached to the coil due to the springback arching of the conductor, resulting in material waste and compression of the insulation space, this application provides a conductor springback control device for winding long round coils of dry-type transformers.

[0006] This application provides a wire springback control device for winding long round coils in a dry-type transformer, which adopts the following technical solution:

[0007] A wire springback control device for winding long round coils of dry-type transformers is disposed between the wire feeding device and the main shaft of the winding machine, including a mounting support assembly and a springback suppression mechanism.

[0008] The rebound suppression mechanism includes a movable support member, a guide assembly, and an elastic pressure member. The movable support member is rotatably or movablely mounted on the mounting support assembly. The guide assembly is disposed on the movable support member and defines a constraint path for the conductor to pass through.

[0009] One end of the elastic pressure member is connected to the mounting support assembly, and the other end is connected to the movable carrier. The elastic pressure member is configured to apply an elastic bias force to the movable carrier so that the guide assembly remains in contact with the conductor and limits the direction of the conductor's rebound arching during conductor transportation.

[0010] By adopting the above technical solution, during the process of the conductor being conveyed from the pay-off device to the winding machine spindle, it can first pass through the conductor constraint path defined by the guide component; the elastic pressure component continuously applies elastic bias force to the movable bearing component, enabling the guide component to adaptively abut as the conductor is conveyed, and limiting the direction of the conductor's rebound arching. Therefore, without the need for continuous external force to press the conductor, its rebound tendency can be suppressed before it enters the winding area, making it easier for the conductor to adhere to the coil mold or the surface of the previous layer of conductor, thereby reducing interlayer gaps, minimizing conductor waste, and helping to ensure the coil's external dimensions and insulation space.

[0011] Furthermore, the guiding assembly includes at least two guide members spaced apart along the wire conveying direction. At least one of the at least two guide members is used to support the wire, and at least the other is used to apply a pressing action to the wire. The supporting action and the pressing action cooperate to form the wire constraint path, so that the wire in the tensioned state is corrected to a straight or near-straight state when passing through the wire constraint path.

[0012] By adopting the above technical solution, at least two guide members can form multi-point constraints in the conductor conveying direction. The guide member supporting the conductor is used to support the conductor, while the guide member pressing the conductor is used to apply a reverse constraint force in the direction of the conductor's rebound arching, thereby providing a more stable correction effect on the conductor when it passes through the conductor constraint path. Compared with a single-point pressing structure, multi-point coordination can reduce the risk of conductor deformation or insulation damage caused by excessive local stress, and improve conductor straightness and conveying stability.

[0013] Furthermore, the guide member is a rotatably mounted guide wheel, which is mounted on the movable support member, and the outer circumferential surface of the guide wheel is provided with a guide groove for limiting the lateral displacement of the conductor.

[0014] By adopting the above technical solution, the conductor can drive the guide wheel to rotate when it passes through the guide wheel, so that the contact between the conductor and the guide component changes from sliding friction to rolling contact, reducing the conductor conveying resistance and the risk of insulation layer wear; the guide groove can restrict the lateral position of the conductor, reduce the left and right swaying or deviating from the guide path during the conveying process, and improve the positional stability of the conductor before entering the winding area.

[0015] Furthermore, the mounting support assembly includes a fixed frame plate, the movable bearing member is rotatably mounted on the fixed frame plate via a pivot, a fixed rod is fixedly provided on one side of the fixed frame plate, one end of the elastic pressure member is connected to the fixed rod, and the other end is connected to the movable bearing member, for applying an elastic torque to the movable bearing member to rotate around the pivot.

[0016] By adopting the above technical solution, the movable bearing member can swing relative to the fixed frame plate around the pivot. The elastic pressure member applies an elastic torque to the movable bearing member through the connection between the fixed rod and the movable bearing member, enabling the guide assembly to stably press against the conductor. This structure converts the elastic tension or elastic thrust of the elastic pressure member into the rotational torque of the movable bearing member. The structure is simple, the force is clearly defined, and it is easy to install and maintain. At the same time, it can adaptively swing within a certain range according to the change of conductor tension, avoiding damage to the conductor caused by rigid pressing.

[0017] Furthermore, the movable support member includes a first support plate and a second support plate arranged opposite to each other, the guide assembly is installed between the first support plate and the second support plate, and a connecting rod is provided between the first support plate and the second support plate, the connecting rod serving as the connecting fulcrum of the elastic pressure member; a limiting structure is provided on the fixed frame plate, the limiting structure being used to limit the rotation range of the movable support member relative to the fixed frame plate; the mounting support assembly also includes a column, the fixed frame plate being disposed on the column, for supporting the springback suppression mechanism near the wire conveying path between the wire feeding device and the winding machine spindle.

[0018] By adopting the above technical solution, the first and second support plates can provide double-sided support for the guide assembly, improving the stability and anti-eccentric load capacity of the guide assembly installation. The connecting rod enhances the overall structural strength between the first and second support plates and serves as a connecting fulcrum for the elastic pressure component, ensuring that the elastic force is stably transmitted to the movable bearing component. The limiting structure restricts the maximum rotation range of the movable bearing component, preventing excessive swaying due to sudden changes in conductor tension or the action of the elastic pressure component, thereby improving the operational safety of the device. The column facilitates the placement of the rebound suppression mechanism near the conductor conveying path, enabling the device to be adapted to existing winding equipment and facilitating on-site installation.

[0019] Furthermore, an adjustment strip hole is provided through one side of the first support plate and the second support plate opposite to each other. The two ends of the connecting rod are respectively slidably disposed in the adjustment strip hole. The elastic force of the elastic pressure member changes with the position of the connecting rod. The first support plate and the second support plate are respectively provided with a fixing mechanism for fixing the connecting rod.

[0020] By adopting the above technical solution, the connecting rod can move along the adjusting slot, thereby changing the connection position between the elastic pressure component and the movable bearing component, and thus adjusting the elastic torque or preload applied by the elastic pressure component to the movable bearing component. Operators can adjust the position of the connecting rod according to the conductor specifications, conductor hardness, winding tension, and rebound degree, so that the pressure applied by the guide assembly to the conductor better matches the actual winding conditions. The fixing mechanism can lock the position of the connecting rod after adjustment, ensuring the stability of the pressure applied during continuous winding.

[0021] Furthermore, the fixing mechanism includes a fixing seat, which is hinged to one side of the first support plate and the second support plate. A coarse adjustment plate is slidably disposed on one side of the fixing seat. A plurality of slots are evenly distributed in a straight line on one side of the coarse adjustment plate. The connecting rod engages with the corresponding slot. The fixing seat is provided with a fine adjustment component for driving the coarse adjustment plate to slide and adjust. Both the first support plate and the second support plate are provided with locking components for locking the fixing seat.

[0022] By adopting the above technical solution, the connecting rod can be selectively engaged in different slots on the coarse adjustment plate to achieve rapid, segmented adjustment of the connecting rod position. The fine adjustment component can further drive the coarse adjustment plate to slide on the basis of coarse adjustment, achieving fine adjustment of the connecting rod position, thus balancing adjustment efficiency and accuracy. The fixed seat adopts a hinged design, which facilitates the installation, disassembly, or repositioning of the connecting rod after opening. The locking component can lock the fixed seat after adjustment, preventing the fixed seat from loosening under equipment vibration or wire tension fluctuations, thereby improving the reliability of the adjustment structure.

[0023] Furthermore, the fine-tuning component includes a screw, which is rotatably mounted on one side of the fixed base. The screw passes through the coarse-tuning plate and is threadedly connected to the coarse-tuning plate. A knob is coaxially mounted on one end of the screw.

[0024] By adopting the above technical solution, rotating the knob drives the screw to rotate. The screw, through its threaded engagement with the coarse adjustment plate, causes the coarse adjustment plate to slide relative to the fixed seat, thereby achieving fine adjustment of the connecting rod position. The threaded drive has the advantages of high adjustment accuracy, good self-locking performance, and simple structure, enabling operators to more easily control the preload of the elastic pressure component and improving the operability and repeatability of the device adjustment.

[0025] Furthermore, the locking assembly includes a locking rod, and a locking seat is fixedly provided on the opposite side of the first support plate and the second support plate, respectively. The locking rod slides through the locking seat. A locking groove is provided at one end of the fixed seat, and the locking rod is inserted into the locking groove. A spring is sleeved on the side wall of the locking rod. One end of the spring is fixedly connected to the locking seat, and the other end of the spring is fixedly connected to the side wall of the locking rod.

[0026] By adopting the above technical solution, the locking rod can remain inserted into the locking groove under the elastic action of the spring, thereby reliably locking the fixed seat onto the first or second support plate and preventing the fixed seat from accidentally opening due to vibration or force changes during operation. When it is necessary to adjust the position of the connecting rod, the operator only needs to overcome the spring force to pull the locking rod, causing the locking rod to disengage from the locking groove, thus releasing the locked state of the fixed seat. Therefore, this locking assembly has the advantages of reliable locking and convenient unlocking, which helps to improve the efficiency of device adjustment and maintenance.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. This application provides a springback suppression mechanism between the pay-off device and the winding machine spindle, so that the conductor is continuously abutted and limited by the guide component before entering the winding area, thereby suppressing the springback arching of the conductor caused by its own bending memory, tension fluctuations and other factors, which is conducive to the close contact between the conductor and the coil surface.

[0029] 2. This application adjusts the connection position of the elastic pressure component by adjusting the slot, connecting rod and fixing mechanism, thereby adjusting the holding force according to different specifications of wires, different winding tensions and different degrees of rebound, thus improving the applicability of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the wire springback control device for winding long round coils of dry-type transformers in this application;

[0031] Figure 2 This is a schematic diagram of the overall structure of the fixed frame plate and the movable load-bearing component of this application;

[0032] Figure 3 This is a structural diagram of the first support plate, the fixing seat, and the fixing mechanism of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Column; 2. Fixed frame plate; 3. Fixed rod; 4. Rotating shaft; 5. Movable load-bearing component; 6. First support plate; 7. Second support plate; 8. Connecting rod; 9. Adjusting strip hole; 10. Limiting rod; 11. Limiting strip hole; 12. Mounting shaft; 13. Guide component; 14. Guide groove; 15. Elastic pressure component; 16. Fixed seat; 17. Locking groove; 18. Coarse adjustment plate; 19. Locking groove; 20. Screw; 21. Knob; 22. Locking rod; 23. Locking seat; 24. Spring; 25. Wire. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0035] See Figure 1 A conductor springback control device for winding long round coils in a dry-type transformer is disclosed. This conductor springback control device is located between the pay-off device and the winding machine spindle, near the conveying path of the conductor 25 before it enters the winding area. After being led out by the pay-off device, the conductor 25 is first guided, limited, and elastically held by this device before entering the coil mold driven by the winding machine spindle or the already wound coil layer, thereby suppressing its springback arching tendency before the conductor 25 enters the winding area.

[0036] The springback control device for the conductor 25 includes a mounting support assembly and a springback suppression mechanism disposed on the mounting support assembly. The mounting support assembly is used to support the springback suppression mechanism near the conductor 25 conveying path and to provide a mounting base for the springback suppression mechanism; the springback suppression mechanism is used to continuously constrain the conductor 25 during the conveying process, so that the conductor 25 remains straight or nearly straight before entering the winding area.

[0037] See Figure 1 and Figure 2 The mounting support assembly includes a column 1 and a mounting plate 2. The column 1 can be fixed to the frame of the winding equipment, a ground foundation, or an independent mounting base, allowing the device to be arranged according to the location of the winding equipment on site. The mounting plate 2 is mounted on the column 1 and can be connected to the column 1 by welding, bolting, or clamping. To accommodate different conductor 25 conveying paths, a height adjustment structure can also be provided between the column 1 and the mounting plate 2, such as a long-hole bolt, a lifting sleeve, or a screw lifting structure, allowing the installation height of the mounting plate 2 to be adjusted according to the height of the conductor 25 entering the winding area.

[0038] A rotating shaft 4 is provided on the fixed frame plate 2, and the rebound suppression mechanism is rotatably mounted on the fixed frame plate 2 via the rotating shaft 4. A fixing rod 3 is provided on one side of the fixed frame plate 2, and the fixing rod 3 is used to connect one end of the elastic pressure member 15.

[0039] The rebound suppression mechanism includes a movable support member 5, a guide assembly, and an elastic pressure member 15. The movable support member 5 can swing about a pivot 4 relative to the fixed frame plate 2. The guide assembly is mounted on the movable support member 5, and the elastic pressure member 15 is connected between the fixed rod 3 and the movable support member 5. The elastic pressure member 15 applies an elastic bias force to the movable support member 5, causing the guide assembly to continuously press or limit the rebound arching direction of the conductor 25, thereby suppressing the arching rebound of the conductor 25 during the conveying process.

[0040] The movable support member 5 includes a first support plate 6 and a second support plate 7 arranged opposite to each other. An installation space for mounting the guide assembly is formed between the first support plate 6 and the second support plate 7. The first support plate 6 and the second support plate 7 are rotatably connected to the fixed frame plate 2 via a pivot 4, allowing the movable support member 5 to swing as a whole around the pivot 4. A connecting rod 8 is provided between the first support plate 6 and the second support plate 7. The connecting rod 8 not only enhances the overall structural strength between the first support plate 6 and the second support plate 7, but also serves as a connection fulcrum between the elastic pressure member 15 and the movable support member 5. One end of the elastic pressure member 15 is connected to the fixed rod 3, and the other end is connected to the connecting rod 8. When the elastic pressure member 15 is in a stretched or compressed state, it applies a force to the connecting rod 8. This force is further converted into an elastic torque that causes the movable support member 5 to swing around the pivot 4, thereby keeping the guide assembly in contact with the guide wire 25.

[0041] In this embodiment, the elastic pressure-applying component 15 is preferably a tension spring. One end of the tension spring is connected to the fixed rod 3, and the other end is connected to the connecting rod 8. When the wire 25 enters the wire 25 constraint path defined by the guide assembly, the tension spring applies a continuous pull force to the movable support component 5, enabling the guide assembly to maintain stable pressure on the wire 25. Due to the elastic deformation capability of the spring, when the tension of the wire 25 fluctuates briefly, or when the wire 25 passes through the transition position between the straight section and the arc section of the long circular coil, causing a change in the force on the wire 25, the movable support component 5 can swing slightly with the state of the wire 25, thereby avoiding damage to the insulation layer of the wire 25 caused by rigid pressure. In other embodiments, the elastic pressure-applying component 15 can also be a compression spring, torsion spring, gas spring, or elastic rubber component, as long as it can apply an elastic bias force to the movable support component 5 to press the guide assembly against the wire 25.

[0042] A limiting structure is also provided on the fixed frame plate 2. The limiting structure is used to limit the swing angle of the rebound suppression mechanism relative to the fixed frame plate 2, so as to avoid excessive swinging of the rebound suppression mechanism due to sudden tension changes in the conductor 25 or the pullback of the elastic pressure member 15. The limiting structure includes a limiting rod 10, which is fixedly connected to one side of the fixed frame plate 2. Limiting slots 11 are opened through the opposite sides of the first support plate 6 and the second support plate 7. The end of the limiting rod 10 away from the fixed frame plate 2 passes through the two limiting slots 11 and is slidably connected to the two limiting slots 11 at the same time. With the above structure, it is possible to ensure that the rebound suppression mechanism has the necessary adaptive swing space, while preventing its swing range from being too large and affecting the conveying stability of the conductor 25.

[0043] The guiding assembly includes at least two guide members 13 spaced apart along the conveying direction of the wire 25. The guide members 13 are mounted between the first support plate 6 and the second support plate 7 and are rotatable relative to the movable support member 5. In this embodiment, the guide member 13 is preferably a guide wheel. The guide wheel is rotatably disposed between the first support plate 6 and the second support plate 7 via a mounting shaft 12, and a guide groove 14 is formed on the outer circumferential surface of the guide wheel. When the wire 25 passes through the guide wheel, the wire 25 is accommodated within the guide groove 14. The guide groove 14 can limit the lateral displacement of the wire 25 during conveying, reducing the possibility of the wire 25 swinging left and right or deviating from the guide path.

[0044] To improve the alignment effect of the conductor 25, the guiding assembly may include two guide wheels. The two guide wheels are spaced apart sequentially along the conveying direction of the conductor 25. The guide wheel at the left end is located on one side of the conductor 25 and is used to support the conductor 25, while the guide wheel at the right end is located on the other side of the conductor 25 and is used to press the conductor 25. After the conductor 25 passes through the two guide wheels in sequence, a slightly angular or approximately straight constraint path is formed between the two guide wheels. The guide wheel supporting the conductor 25 and the guide wheel pressing the conductor 25 cooperate with each other, subjecting the conductor 25 to two-point constraint, thereby limiting the tendency of the conductor 25 to a small range. Compared to a single pressure wheel directly pressing the conductor 25, the two-point guiding structure can reduce single-point contact pressure, reducing the risk of insulation wear and cross-sectional deformation of the conductor 25.

[0045] In practical use, the pressing direction of the guide assembly can be determined according to the rebound direction of the conductor 25. When the conductor 25 has an upward arching tendency, the guide wheel located on the arched side of the conductor 25 can apply a downward pressing force to the conductor 25; when the conductor 25 rebounds in the opposite direction due to the wire feeding path or the memory of the wire reel, the guide assembly can always limit the rebound arching direction of the conductor 25 by changing the installation direction of the device or adjusting the arrangement of the guide wheels.

[0046] See Figure 2 and Figure 3The first support plate 6 and the second support plate 7 each have an adjustment slot 9 through them, and the two adjustment slots 9 are arranged opposite each other. The two ends of the connecting rod 8 pass through and slide within the corresponding adjustment slots 9, allowing the connecting rod 8 to move along the length of the adjustment slot 9. Since the elastic pressure member 15 is connected to the connecting rod 8, when the position of the connecting rod 8 changes, the tension of the elastic pressure member 15 and its lever arm relative to the rotating shaft 4 may change, thereby altering the elastic torque applied by the elastic pressure member 15 to the movable bearing member 5. By adjusting the position of the connecting rod 8, the force with which the guide assembly holds the wire 25 can be changed to accommodate wires 25 of different specifications, hardness, and resilience.

[0047] See Figure 3 To fix the position of the connecting rod 8 after adjustment, a fixing mechanism is provided on the first support plate 6 and the second support plate 7 respectively. The fixing mechanism includes a fixing seat 16, a coarse adjustment plate 18, a fine adjustment component, and a locking component. The fixing seat 16 is hinged to the outside of the first support plate 6 or the second support plate 7, so that the fixing seat 16 can be opened or closed relative to the corresponding support plate. When the fixing seat 16 is closed, the fixing mechanism can limit the end of the connecting rod 8; when the fixing seat 16 is open, the connecting rod 8 can move within the adjustment slot 9, which facilitates position adjustment or disassembly and maintenance.

[0048] The coarse adjustment plate 18 is slidably mounted on the fixed base 16, and a plurality of slots 19 evenly distributed along a straight line are provided on one side of the coarse adjustment plate 18. The end of the connecting rod 8 can be selectively engaged into one of the slots 19. By engaging the connecting rod 8 into different slots 19, the approximate position of the connecting rod 8 in the adjusting slot 9 can be quickly changed, realizing graded coarse adjustment of the position of the connecting rod 8. The arrangement direction of the plurality of slots 19 is consistent with or substantially consistent with the length direction of the adjusting slot 9, so as to ensure that the connecting rod 8 can stably cooperate with the adjusting slot 9 after being engaged in different slots 19.

[0049] The fine-tuning assembly includes a screw 20 and a knob 21. The screw 20 is rotatably mounted on the fixed base 16, and passes through and is threadedly connected to the coarse-tuning plate 18. The knob 21 is coaxially mounted at one end of the screw 20. When the operator rotates the knob 21, the knob 21 drives the screw 20 to rotate, and the screw 20 drives the coarse-tuning plate 18 to slide relative to the fixed base 16 through the threaded engagement, thereby causing the connecting rod 8, which is engaged with the slot 19, to move slightly along the adjusting strip hole 9. Thus, based on the graded adjustment of the coarse-tuning slot 19, continuous fine-tuning of the position of the connecting rod 8 can also be achieved, so that the preload of the elastic pressure member 15 and the elastic torque on the movable bearing member 5 can be more accurately matched to the actual winding conditions.

[0050] The locking assembly is used to lock the fixed seat 16 in the closed state. The locking assembly includes a locking rod 22, a locking seat 23, and a spring 24. The locking seat 23 is fixedly disposed on the side of the first support plate 6 or the second support plate 7 opposite to the guide assembly, and the locking rod 22 slides through the locking seat 23. One end of the fixed seat 16 is provided with a locking groove 17, into which the locking rod 22 can be inserted. The spring 24 is sleeved on the locking rod 22, with one end connected to the locking seat 23 and the other end connected to the locking rod 22, causing the locking rod 22 to tend to insert into the locking groove 17 under the action of the spring 24. When the fixed seat 16 is closed in place, the locking rod 22 automatically inserts into the locking groove 17 under the action of the spring 24, thereby locking the fixed seat 16. When the position of the connecting rod 8 needs to be adjusted, the operator pulls the locking rod 22, causing the locking rod 22 to overcome the elastic force of the spring 24 and disengage from the locking groove 17, thus releasing the locked state of the fixed seat 16. For ease of operation, a pull ring or handle can be provided at the end of the locking bar 22 away from the locking groove 17.

[0051] It is worth noting that, in practical applications, a scale can also be set on the fixed base 16 so that the coarse adjustment plates 18 on both sides can be adjusted to the same position, thereby improving the smoothness of adjustment.

[0052] Working principle of a wire springback control device for winding long round coils of dry-type transformers:

[0053] During installation, first fix the column 1 at a suitable position between the pay-off device and the winding machine spindle, so that the guide assembly is located near the conveying path of the wire 25 before it enters the winding area. Then adjust the height and orientation of the fixing plate 2 so that the constraint path of the wire 25 in the guide assembly is consistent with or substantially consistent with the conveying direction of the wire 25. After installation, lead the wire 25 out of the pay-off device and let the wire 25 pass through the two guide wheels in the guide assembly in sequence, so that the wire 25 is accommodated in the guide groove 14 on the outer circumference of each guide wheel.

[0054] After the conductor 25 is installed, adjust the position of the connecting rod 8 in the adjusting slot 9 according to the conductor 25 specifications, conductor 25 stiffness, insulation layer thickness, and on-site winding tension. During adjustment, first use a tool to pull the connecting rod 8, then release the locking assembly from the fixing seat 16, open the fixing seat 16 or disengage the connecting rod 8 from its original slot 19, and then use a tool to slowly move the connecting rod 8 to a suitable coarse adjustment position, so that the end of the connecting rod 8 is engaged in the corresponding slot 19; then close the fixing seat 16 and lock it using the locking assembly. If further adjustment of the holding force is still needed, simultaneously rotate the knobs 21 on both sides, causing the screw 20 to drive the coarse adjustment plate 18 to slide, thereby fine-tuning the position of the connecting rod 8. After adjustment, the elastic pressure member 15 is in a predetermined pre-tightened state and applies a suitable elastic bias force to the movable bearing member 5.

[0055] During winding, the winding machine spindle pulls the lead wire 25 towards the coil mold. As the lead wire 25 passes the guide assembly, it drives the guide wheel to rotate. The guide wheel and lead wire 25 primarily form rolling contact, which reduces the conveying resistance of the lead wire 25 and minimizes insulation wear. The elastic pressure member 15 continuously applies an elastic torque to the movable bearing member 5, keeping the guide assembly in contact with the lead wire 25. When the lead wire 25 exhibits a tendency to spring back and arch due to coiling memory, conveying tension fluctuations, or changes in force at the transition between the straight and curved sections of the long circular coil, the guide assembly limits and reverses the arching direction of the lead wire 25, ensuring that the lead wire 25 maintains good straightness and positional stability before entering the winding area.

[0056] Because the movable support member 5 can swing slightly around the rotating shaft 4, when the tension of the conductor 25 suddenly increases or decreases, the guide assembly can adapt to the state of the conductor 25, avoiding excessive rigid pressure on the conductor 25. The limiting structure restricts the maximum swing range of the movable support member 5, preventing it from excessively returning to its original position under the action of the elastic pressure member 15 or excessively deflecting under the impact of the conductor 25, thereby ensuring the safe and stable operation of the device.

[0057] In summary, this application can continuously constrain and correct the rebound arching direction of the conductor 25 before it enters the winding area without requiring continuous external pressure on the conductor 25 or simply relying on increasing the winding tension. After passing through this device, the conductor 25 can fit more tightly against the coil mold or the surface of the previous layer of conductor 25, thereby reducing interlayer gaps, reducing material waste of the conductor 25, and facilitating the control of the radial dimensions and insulation space of the elongated coil, thus improving the winding quality and dimensional consistency of the dry-type transformer coil.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wire springback control device for winding long round coils of a dry-type transformer, disposed between the pay-off device and the main shaft of the winding machine, characterized in that, This includes mounting support components and a rebound suppression mechanism; The rebound suppression mechanism includes a movable support member (5), a guide assembly, and an elastic pressure member (15). The movable support member (5) is rotatably or movablely mounted on the mounting support assembly. The guide assembly is disposed on the movable support member (5) and defines a constraint path through which the conductor (25) passes. One end of the elastic pressure member (15) is connected to the mounting support assembly, and the other end is connected to the movable carrier (5). The elastic pressure member (15) is configured to apply an elastic bias force to the movable carrier (5) so that the guide assembly remains in contact with the wire (25) and limits the rebound arching direction of the wire (25) during the conveying of the wire (25).

2. The wire springback control device for winding long round coils of a dry-type transformer according to claim 1, characterized in that: The guiding assembly includes at least two guide members (13) spaced apart along the conveying direction of the conductor (25). At least one of the at least two guide members (13) is used to support the conductor (25), and at least the other is used to apply a pressing action to the conductor (25). The supporting action and the pressing action cooperate to form a constraint path of the conductor (25), so that the conductor (25) in the tensioned state is corrected to a straight or nearly straight state when passing through the constraint path of the conductor (25).

3. The wire springback control device for winding long round coils of a dry-type transformer according to claim 2, characterized in that: The guide member (13) is a rotatable guide wheel, which is mounted on the movable support member (5). The outer circumferential surface of the guide wheel is provided with a guide groove (14) for limiting the lateral displacement of the conductor (25).

4. The wire springback control device for winding long round coils of a dry-type transformer according to claim 1, characterized in that: The mounting support assembly includes a fixed frame plate (2), and the movable bearing member (5) is rotatably mounted on the fixed frame plate (2) via a rotating shaft (4). A fixed rod (3) is fixedly provided on one side of the fixed frame plate (2). One end of the elastic pressure member (15) is connected to the fixed rod (3), and the other end is connected to the movable bearing member (5), for applying an elastic torque to the movable bearing member (5) to rotate around the rotating shaft (4).

5. The wire springback control device for winding long round coils of a dry-type transformer according to claim 4, characterized in that: The movable support member (5) includes a first support plate (6) and a second support plate (7) arranged opposite to each other. The guide assembly is installed between the first support plate (6) and the second support plate (7). A connecting rod (8) is provided between the first support plate (6) and the second support plate (7). The connecting rod (8) serves as the connecting fulcrum of the elastic pressure member (15). A limiting structure is provided on the fixed frame plate (2). The limiting structure is used to limit the rotation range of the movable support member (5) relative to the fixed frame plate (2). The mounting support assembly also includes a column (1). The fixed frame plate (2) is provided on the column (1) and is used to support the springback suppression mechanism near the wire (25) conveying path between the wire feeding device and the winding machine spindle.

6. The wire springback control device for winding long round coils of a dry-type transformer according to claim 5, characterized in that: An adjustment strip hole (9) is provided through one side of the first support plate (6) and the second support plate (7). The two ends of the connecting rod (8) are respectively slidably disposed in the adjustment strip hole (9). The elastic force of the elastic pressure member (15) changes with the position of the connecting rod (8). The first support plate (6) and the second support plate (7) are respectively provided with a fixing mechanism for fixing the connecting rod (8).

7. The wire springback control device for winding long round coils of a dry-type transformer according to claim 6, characterized in that: The fixing mechanism includes a fixing seat (16), which is hinged to one side of the first support plate (6) and the second support plate (7). A coarse adjustment plate (18) is slidably provided on one side of the fixing seat (16). A plurality of slots (19) are evenly distributed in a straight line on one side of the coarse adjustment plate (18). The connecting rod (8) engages with the corresponding slot (19). The fixing seat (16) is provided with a fine adjustment component for driving the coarse adjustment plate (18) to slide and adjust. Both the first support plate (6) and the second support plate (7) are provided with locking components for locking the fixing seat (16).

8. The wire springback control device for winding long round coils of a dry-type transformer according to claim 7, characterized in that: The fine adjustment assembly includes a screw (20), which is rotatably mounted on one side of the fixed base (16). The screw (20) passes through the coarse adjustment plate (18) and is threadedly connected to the coarse adjustment plate (18). A knob (21) is coaxially mounted on one end of the screw (20).

9. The wire springback control device for winding long round coils of a dry-type transformer according to claim 7, characterized in that: The locking assembly includes a locking rod (22). Lock seats (23) are fixedly provided on the opposite sides of the first support plate (6) and the second support plate (7). The locking rod (22) slides through the lock seat (23). A lock groove (17) is provided at one end of the fixed seat (16). The locking rod (22) is inserted into the lock groove (17). A spring (24) is sleeved on the side wall of the locking rod (22). One end of the spring (24) is fixedly connected to the lock seat (23), and the other end of the spring (24) is fixedly connected to the side wall of the locking rod (22).

Images