A power transformer winding and coating integrated machine and a manufacturing method thereof

Abstract

The application discloses a power transformer winding and rubber coating integrated machine and a manufacturing method thereof, and belongs to the field of transformer coil production. The machine comprises a base plate, a control terminal and a winding framework. The surface of the base plate is sequentially provided with a feeding mechanism, a rotating mechanism and a winding mechanism in the horizontal direction. The feeding mechanism is provided with a horizontal moving carrying mechanism above. The winding mechanism is provided with a rubber belt support below. The self-adaptive barrier wall rubber belt with heat expansion compensation and magnetic field response characteristics is manufactured. The modified magnetorheological layer carbonyl iron powder is driven to directional arrangement by the magnetic field of the permanent magnet column during the rubber coating rotation. The penetration force of the pressure-sensitive adhesive to the coil gap is enhanced. The framework is contracted when the coil is working and heated to the preset phase change temperature. The coil thermal expansion is actively compensated. The aging of the insulation paper is avoided. The chain structure is formed in the coil magnetic field through the modified magnetorheological layer. The rubber belt hardness is improved to resist vibration impact. The heat conduction network is constructed to improve the heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer coil production, and in particular to a power transformer winding and rubber coating integrated machine and a manufacturing method thereof. BACKGROUND

[0002] In the field of power transformer manufacturing, winding and rubber coating are the core processes that determine the reliability of the product, and winding and rubber coating processes are usually realized by winding and rubber coating integrated machines.

[0003] The existing winding and rubber coating process, in the rubber coating process, the adhesive tape wrapped by the conventional rubber coating mechanism only contacts the surface of the coil, and the adhesive cannot effectively penetrate into the gap of the tightly wound copper wire, resulting in insufficient bonding strength of the interface between the turn-to-turn insulation paper and the coil. When the power transformer is running under load, the winding will be micro-displaced under the action of the periodic Lorentz force generated by the interaction of the leakage magnetic field and the current, and long-term accumulation will cause a vicious cycle of "coil sagging-insulation wear-turn-to-turn short circuit", and the above vicious cycle is one of the main causes of transformer burnout.

[0004] Under high temperature, due to the difference in the thermal expansion coefficient of the material, the copper coil will expand more violently than the insulation paper, but the existing adhesive tape has no active thermal compensation mechanism, and the radial expansion stress of the coil will continuously extrude the interlayer insulation adhesive tape, resulting in accelerated aging of the insulation paper and affecting the safety of long-term operation of the transformer.

[0005] Therefore, a power transformer winding and rubber coating integrated machine and a manufacturing method thereof are proposed to solve the above problems. SUMMARY

[0006] The purpose of the present application is to solve the problem of the performance limitation of the adhesive tape in the production of transformer coils in the prior art, and to propose a power transformer winding and rubber coating integrated machine and a manufacturing method thereof.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] A power transformer winding and rubber coating integrated machine, comprising a base plate, a control terminal and a winding skeleton, the surface of the base plate is provided with a feeding mechanism, a rotating mechanism and a winding mechanism in sequence in the horizontal direction, the upper side of the feeding mechanism is provided with a transverse moving carrying mechanism, and the lower side of the winding mechanism is provided with an adhesive tape support;

[0009] The feeding mechanism comprises a sliding rail mounted on the surface of the base plate, a stepping motor is arranged on the outer side of the sliding rail, the sliding rail is slidably connected with a stepping platform, the upper surface of the stepping platform is provided with a placing block, and the side of the placing block facing the winding mechanism is provided with a traction assembly;

[0010] The transverse moving carrying mechanism comprises a carrying clamp jaw, and a rubber cutting blade is mounted on the side of the carrying clamp jaw close to the winding mechanism.

[0011] The rotating mechanism comprises a fixed frame, an outer side wall of the fixed frame is provided with a rotating motor, a glue distribution assembly is arranged between the fixed frame and the adhesive tape support, two main shafts are oppositely arranged on the two sides of the fixed frame, the output ends of the two main shafts are respectively provided with a grabbing actuator and a positioning actuator, and a glue pressing block is arranged below the grabbing actuator.

[0012] The side wall of the adhesive tape support is connected with an adhesive tape frame through a high-resistance rotating shaft, and the adhesive tape frame is internally provided with a self-adaptive barrier wall adhesive tape.

[0013] Preferably, the upper surface of the placing block is provided with a plurality of limiting clamping grooves matched with the winding skeletons, for limiting the winding skeletons in the process of step-by-step conveying, and the upper surface of the placing block is provided with a knife groove matched with the glue cutting blade, for compensating the distance of the glue cutting blade in the process of grabbing.

[0014] Preferably, the traction assembly comprises a distance compensation rod, one end of the distance compensation rod is fixedly connected with the side wall of the placing block, and the other end of the distance compensation rod is provided with a traction clamp for traction of the self-adaptive barrier wall adhesive tape.

[0015] Preferably, the side of the grabbing actuator facing the positioning actuator is provided with two inner support plates matched with the winding skeletons, the inner support plates are internally provided with permanent magnet columns fixedly connected with the grabbing actuator, for enhancing the adhesion of the self-adaptive barrier wall adhesive tape.

[0016] Preferably, the two inner support plates are oppositely arranged in an inclined manner, so that the outer diameters of the two inner support plates are smaller than the inner diameter of the winding skeleton to pass through the winding skeleton, and the inner side walls of the two inner support plates are fixedly connected with inner support driving pieces for supporting the inner support plates, and the two inner support plates are in interference fit with the winding skeleton in the supporting state to realize the fixation of the winding skeleton.

[0017] Preferably, the side of the positioning actuator facing the grabbing actuator is provided with a pressing clamping groove matched with the winding skeleton, and the center of the positioning actuator is provided with a top block matched with the inner support driving piece, the inner support driving piece is deformed by the top block to drive the inner support plates to be supported.

[0018] Preferably, the glue distribution assembly comprises a support plate, the side of the support plate facing the grabbing actuator is provided with a limiting clamp jaw, the tension of the self-adaptive barrier wall adhesive tape is guaranteed by clamping, and the premise for the self-adaptive barrier wall adhesive tape to be cut by the glue cutting blade is provided.

[0019] Preferably, the adaptive baffle tape comprises a double-layer substrate, a thermal expansion compensation layer is formed between the double-layer substrate, a memory alloy framework is arranged in the thermal expansion compensation layer, the memory alloy framework is used for compensating thermal expansion and contraction of a pure copper coil in a working process, a modified magnetorheological layer is coated on surfaces of the double-layer substrate, and pressure-sensitive adhesive is coated on a surface of the modified magnetorheological layer.

[0020] According to a manufacturing method of a power transformer winding coating and gluing all-in-one machine, the following steps are included:

[0021] S1, raw material pretreatment: polyimide film is used as a substrate after plasma surface treatment, two groups of polyimide film substrates are prepared, a memory alloy framework is trained by using a Ni-Ti alloy wire for shape memory training, the shape memory training is used for presetting a compensation deformation amount, and premixing material of a modified magnetorheological layer is formed by mixing modified carbonyl iron powder, silicon oil and nano silicon dioxide;

[0022] S2, thermal expansion compensation layer preparation: a micro-gravure coating process is used to form an array of spaced limit points on the bottom layer substrate, the memory alloy framework is arranged and fixed in the gap of the array of limit points, and the upper layer substrate is covered and then subjected to hot pressing and compounding;

[0023] S3, modified magnetorheological layer coating: the premixing material in S1 is coated on the upper layer substrate by using a slot coating process, and then subjected to UV curing;

[0024] S4, pressure-sensitive adhesive coating: after the modified magnetorheological layer is cured, the pressure-sensitive adhesive is coated on the modified magnetorheological layer and then dried;

[0025] S5, product processing: the prepared adaptive baffle tape is cut into a tape shape with a width matching the winding framework, and then wound up, the tension in the winding process is less than 2 Newton, irreversible deformation of the memory alloy framework is prevented, and the manufacturing of the adaptive baffle tape is completed.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The present application can manufacture an adaptive baffle tape with thermal expansion compensation and magnetic field response characteristics by presetting a deformation amount of a memory alloy framework through shape memory training, accurately arranging the framework on a substrate by forming an array of limit points on the substrate by using a micro-gravure coating process, coating a modified magnetorheological layer on the substrate by hot pressing and compounding and slot coating, and finally coating pressure-sensitive adhesive and drying and cutting.

[0028] 2. The present application can trigger the framework to contract when a coil is heated to a preset phase change temperature, actively compensate the thermal expansion of the coil, avoid accelerating the aging of the insulating paper, form a chain structure in the magnetic field of the coil through the modified magnetorheological layer, synchronously improve the hardness of the tape to resist vibration and impact, and construct a heat conduction network to improve the heat dissipation efficiency.

[0029] 3. The application sets the grabbing executor, and the modified magnetic flow layer carbonyl iron powder directional arrangement is driven by the magnetic field of the permanent magnet column when the encapsulation rotates, the penetration force of the pressure sensitive adhesive to the coil gap is enhanced, and the encapsulation firmness is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The overall structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0031] Figure 2 The structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application; Figure 1 The enlarged view of A in the middle;

[0032] Figure 3 The structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0033] Figure 4 The structure assembly diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0034] Figure 5 The structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0035] Figure 6 The structure sectional view of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0036] Figure 7 The structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0037] Figure 8 The structure schematic diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0038] Figure 9 The structure assembly diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application;

[0039] Figure 10 The structure assembly diagram of a power transformer winding encapsulation all-in-one machine and manufacturing method thereof is provided in the application; Figure 9 The enlarged view of B in the middle.

[0040] In the figure: 1, base plate; 2, control terminal; 3, winding skeleton; 4, transverse conveying mechanism; 5, adhesive tape support; 501, adhesive tape frame; 6, slide rail; 7, stepping motor; 8, stepping stage; 9, storage block; 10, conveying clamp jaw; 11, adhesive tape cutting blade; 12, fixed frame; 1201, rotating motor; 13, main shaft; 14, grabbing executor; 15, positioning executor; 16, adhesive tape pressing block; 17, self-adaptive barrier adhesive tape; 1701, double-layer base material; 1702, memory alloy skeleton; 1703, modified magnetorheological layer; 1704, pressure-sensitive adhesive; 18, distance compensation rod; 19, traction clamp; 20, inner support plate; 21, permanent magnet column; 22, inner support driving piece; 23, top block; 24, support plate; 25, limiting clamp jaw. DETAILED DESCRIPTION

[0041] 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, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements referred to in a particular orientation, constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment, refer to Figures 1 to 10 A power transformer winding and adhesive coating all-in-one machine and a manufacturing method thereof, comprising a base plate 1, a control terminal 2 and a winding skeleton 3, the surface of the base plate 1 is provided with a feeding mechanism, a rotating mechanism and a winding mechanism in the horizontal direction in turn, a transverse conveying mechanism 4 is arranged above the feeding mechanism, and an adhesive tape support 5 is arranged below the winding mechanism.

[0045] The feeding mechanism includes a slide rail 6 mounted on the surface of the base plate 1, and a stepping motor 7 is arranged on the outer side of the slide rail 6. The slide rail 6 is slidingly connected with a stepping platform 8, and the upper surface of the stepping platform 8 is provided with a storage block 9. The side of the storage block 9 facing the winding mechanism is provided with a traction assembly;

[0046] The transverse conveying mechanism 4 includes a conveying gripper 10 for grabbing the winding framework 3 and moving to the rotating mechanism. A rubber cutting blade 11 is arranged on the side of the conveying gripper 10 close to the winding mechanism, and is used for cutting the adaptive barrier tape 17;

[0047] The rotating mechanism includes a fixed frame 12, and a rotating motor 1201 is arranged on the outer side wall of the fixed frame 12. The rotating motor 1201 drives the main shaft 13 to rotate at high speed to switch the processing surface of the winding framework 3, realizes the winding function, and a rubber separating assembly is arranged between the fixed frame 12 and the tape support 5. Two main shafts 13 are arranged on the two sides of the fixed frame 12, and a grabbing executor 14 and a positioning executor 15 are arranged on the output ends of the two main shafts 13 respectively. The lower side of the grabbing executor 14 is provided with a rubber pressing block 16, which is used for pushing the adhesive interface of the adaptive barrier tape 17 to the surface of the winding coil;

[0048] The tape support 5 is rotatably connected with a high-resistance rotating shaft on the side wall, which is used for providing constant damping force to avoid the rotation of the tape, so as to maintain the tension of the tape. The tape support 5 is connected with a tape frame 501 through the high-resistance rotating shaft, and the adaptive barrier tape 17 is arranged in the tape frame 501.

[0049] Further, the upper surface of the storage block 9 is provided with a plurality of limiting grooves matched with the winding framework 3, which is used for limiting the winding framework 3 during the stepping conveying process. The upper surface of the storage block 9 is provided with a knife groove matched with the rubber cutting blade 11. The depth of the knife groove is greater than the length of the rubber cutting blade 11 and matches the movement track of the conveying gripper 10, which is used for compensating the distance of the rubber cutting blade 11 during the grabbing process;

[0050] Further, the traction assembly includes a distance compensation rod 18, one end of which is fixedly connected with the side wall of the storage block 9, and the other end of the distance compensation rod 18 is provided with a traction clamp 19 for traction of the adaptive barrier tape 17;

[0051] Further, the side of the grabbing executor 14 facing the positioning executor 15 is provided with two inner supporting plates 20 matched with the winding framework 3. The inner supporting plates 20 are provided with permanent magnet columns 21 fixedly connected with the grabbing executor 14, which are used for enhancing the adhesion of the adaptive barrier tape 17;

[0052] The further advantage is that when the grabbing actuator 14 rotates at high speed during the encapsulation process, the magnetic field generated by the permanent magnet column 21 promotes the directional arrangement of the carbonyl iron powder in the modified magneto-rheological layer 1703 to form a chain structure, thereby enhancing the permeability of the pressure-sensitive adhesive 1704 to the coil gap to improve the adhesion and the encapsulation firmness.

[0053] Further, the two inner support plates 20 are arranged in relative inclination, and the outer diameter of the two inner support plates 20 is smaller than the inner diameter of the winding framework 3 so that the two inner support plates 20 can pass through the winding framework 3. The inner side walls of the two inner support plates 20 are fixedly connected with inner support driving pieces 22 for supporting the inner support plates 20. The two inner support plates 20 are in interference fit with the winding framework 3 in the supporting state to fix the winding framework 3, and the interference amount is 0.1 mm.

[0054] It should be noted that the inner support plates 20 are made of magnetically conductive metal materials.

[0055] Further, the side of the positioning actuator 15 facing the grabbing actuator 14 is provided with a compression clamping groove matching the winding framework 3, and the center of the positioning actuator 15 is provided with a top block 23 matching the inner support driving piece 22. The inner support driving piece 22 is deformed by the top block 23 to drive the inner support plate 20 to be supported.

[0056] Further, the glue dispensing assembly includes a support plate 24, and the side of the support plate 24 facing the grabbing actuator 14 is provided with a limiting jaw 25. The limiting jaw 25 ensures the tension of the adaptive barrier tape 17, and provides a prerequisite for the cutting of the adaptive barrier tape 17 by the cutting blade 11.

[0057] Further, the adaptive barrier tape 17 includes a double-layer base material 1701, and a thermal expansion compensation layer is formed between the double-layer base material 1701. A memory alloy framework 1702 is arranged in the thermal expansion compensation layer to compensate for the thermal expansion and contraction of the pure copper coil during operation. The surface of the double-layer base material 1701 is coated with a modified magneto-rheological layer 1703, and the surface of the modified magneto-rheological layer 1703 is coated with a pressure-sensitive adhesive 1704.

[0058] The further advantage is that the memory alloy framework 1702 can restore the pre-programmed shape when the coil is heated to the preset phase change temperature, and actively shrink the thermal expansion compensation layer volume to compensate for the coil thermal expansion, thereby avoiding the accelerated aging of the insulation paper caused by the coil expansion and extrusion. At the same time, the modified magneto-rheological layer 1703 can form a chain structure using the coil working magnetic field, which not only significantly improves the hardness of the tape to resist vibration impact and reduce coil displacement, but also builds an efficient heat conduction network to improve the coil heat dissipation efficiency.

[0059] The steps for manufacturing the adaptive retaining wall adhesive tape 17 in the present application are as follows: surface treatment is performed on two groups of polyimide film substrates, shape memory training and preset compensation deformation are performed on the Ni-Ti alloy wire memory alloy framework 1702, modified magnetorheological layer 1703 premix is prepared by mixing carbonyl iron powder, silicone oil and nanosilica, a micro-gravure coating process is used to form an interval limiting point array on the bottom substrate, the memory alloy framework 1702 is arranged and fixed in the interval limiting point array gap and covered with the upper substrate, and then hot pressing is performed, a slit coating process is used to coat the premix on the upper substrate and UV curing is performed, pressure-sensitive adhesive 1704 is coated on the cured modified magnetorheological layer 1703 and dried, and the adhesive tape is cut into a strip shape matching the width of the winding framework 3.

[0060] In use, the adaptive retaining wall adhesive tape 17 is unwound and placed in the working area of the limiting clamp 25 with the tape head slightly protruding from the working area of the limiting clamp 25, so that the traction clamp 19 can grab it. The control terminal 2 drives the limiting clamp 25 to clamp, limits the adaptive retaining wall adhesive tape 17, and places the winding framework 3 in the limiting clamping groove of the placing block 9. The stepping motor 7 drives the stepping stage 8 to stepwise transport the winding framework 3 to the carrying station along the slide rail 6. When the winding framework 3 is located in the carrying station, the carrying clamp 10 driven by the transverse carrying mechanism 4 descends to grab the winding framework 3. During the grabbing process, the cutting blade 11 enters the knife groove and moves synchronously with the carrying clamp 10 in the knife groove, preventing the cutting blade 11 from blocking the work of the carrying clamp 10. After the carrying clamp 10 completes the grabbing, the winding framework 3 is moved to the working area of the grabbing actuator 14. Then, the spindle 13 is elongated to drive the grabbing actuator 14 to move towards the winding framework 3, so that the inner support plate 20 enters the inside of the winding framework 3, and the inner support driving piece 22 extrudes the top block 23 in the positioning actuator 15. After the inner support driving piece 22 extrudes the top block 23, it deforms under the action of its own elastic force, thereby pushing the inner support plate 20 to expand, so that the inner support plate 20 is in interference fit with the winding framework 3, and the grabbing is completed.

[0061] During winding and encapsulation, the lead wire is installed at the end of the winding framework 3 by the winding mechanism and then pulled to the outer side wall of the winding framework 3. Then, the spindle 13 drives the grabbing actuator 14 and the positioning actuator 15 to rotate at high speed, and the synchronous transverse movement of the winding mechanism is completed by the high-speed rotation of the rotating mechanism to complete one layer of winding (this is the existing winding process, which will not be described below).

[0062] After completing a layer of winding, the stepping motor 7 drives the stepping platform 8 to translate until the working area of the traction clamp 19 is aligned with the adhesive head of the adaptive barrier tape 17. The control terminal 2 controls the traction clamp 19 to clamp the adhesive head of the adaptive barrier tape 17, then the limiting clamp jaw 25 is released, the stepping platform 8 translates in the horizontal direction, so that the adhesive head of the adaptive barrier tape 17 passes through the tape pressing block 16, then the tape pressing block 16 rises, pushing the adhesive interface of the adaptive barrier tape 17 to be close to the coil that has completed winding, then the transverse transfer mechanism 4 drives the transfer clamp 10 to move to the position where the cutting blade 11 is aligned with the surface of the tape pressing block 16 close to one end of the traction clamp 19 and is lowered, cutting the adaptive barrier tape 17 by the cutting blade 11, then the rotating mechanism rotates at high speed to complete single-layer encapsulation. During the encapsulation process, under the action of the permanent magnet column 21, the carbonyl iron powder in the modified magneto rheological layer 1703 is directionally arranged to form a chain structure under the action of the magnetic field, causing the modified magneto rheological layer 1703 to produce bending deformation. These microstructures deflect downward or upward, pushing the pressure-sensitive adhesive 1704 to penetrate into the gap between the coils, increasing the actual contact area of the pressure-sensitive adhesive 1704 with the surface of the adherend, thereby increasing the adhesion, after encapsulation, the limiting clamp jaw 25 clamps the adaptive barrier tape 17, the transverse transfer mechanism 4 drives the transfer clamp 10 to move to the position where the cutting blade 11 is aligned with the surface of the tape pressing block 16 away from one end of the traction clamp 19 and is lowered to cut the adaptive barrier tape 17, then the rotating mechanism rolls again to cover the residual tape to the transformer coil, completing single-layer encapsulation, then repeating the above steps until the winding and encapsulation of all coils are completed.

[0063] The transformer coil that has completed encapsulation generates an alternating leakage magnetic field in the transformer coil winding during operation, and the modified magneto rheological layer 1703 in the adaptive barrier tape 17 can intelligently respond to this working magnetic field, and the carbonyl iron powder inside it quickly directionally arranges to form a strong chain microstructure;

[0064] It should be noted that under the influence of the alternating leakage magnetic field, the carbonyl iron powder particles in the modified magneto rheological layer 1703 are solidified in the non-liquid polymer matrix, thereby greatly inhibiting the displacement dissipation and chain structure rupture of the particles when the magnetic field is switched, so that it can maintain the integrity of the chain structure under the alternating field, and the chain structure strength is weaker than that in the direct current field, but significantly higher than that in the zero field state;

[0065] The modified magneto rheological layer 1703 forming a chain structure significantly hardens the adaptive barrier tape 17, making it have excellent anti-vibration fatigue characteristics, and can inhibit the displacement and fretting wear of the coil caused by electromagnetic force or external mechanical vibration during transformer operation, greatly reducing the risk of turn-to-turn short circuit or insulation damage caused by transformer coil loosening and deformation, directly improving the reliability of long-term operation of the transformer, and at the same time, a heat conduction network is constructed, the conduction rate of heat from the high-temperature coil inside to the external insulating medium is enhanced, which helps to reduce the working temperature of the coil;

[0066] When the transformer load increases and the temperature of the transformer coil reaches the preset value (which is achieved by customizing the austenite phase transition temperature of the memory alloy skeleton 1702, which is a prior art), the memory alloy skeleton 1702 restores its preprogrammed contraction form, actively reduces the volume of the thermal expansion compensation layer, and offsets the radial extrusion stress generated by the thermal expansion of the pure copper coil, preventing the expanded coil from excessively pressing the insulating paper (double-layer base material 1701), thereby slowing down the accelerated aging process of the adaptive baffle tape 17 under the dual action of high temperature and mechanical stress, and providing a guarantee for the long-term safe operation of the transformer.

[0067] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical scope disclosed by the present application according to the technical solutions and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A power transformer winding encapsulation all-in-one machine, comprising a base plate (1), a control terminal (2) and a winding framework (3), characterized in that, The surface of the substrate (1) is sequentially provided with a feeding mechanism, a rotating mechanism and a winding mechanism in the horizontal direction, the upper side of the feeding mechanism is provided with a transverse moving carrying mechanism (4), and the lower side of the winding mechanism is provided with an adhesive tape support (5); The feeding mechanism comprises a sliding rail (6) mounted on the surface of the substrate (1), the outer side of the sliding rail (6) is provided with a stepping motor (7), the sliding rail (6) is slidingly connected with a stepping stage (8), the upper surface of the stepping stage (8) is provided with a storage block (9), and the side of the storage block (9) facing the winding mechanism is provided with a traction assembly; The transverse moving carrying mechanism (4) comprises a carrying clamp jaw (10), and the side of the carrying clamp jaw (10) close to the winding mechanism is provided with a cutting adhesive tape blade (11); The rotating mechanism comprises a fixed frame (12), the outer side wall of the fixed frame (12) is provided with a rotating motor (1201), the fixed frame (12) and the adhesive tape support (5) are provided with a glue separating assembly, the two sides of the fixed frame (12) are provided with two main shafts (13) in opposition, the output ends of the two main shafts (13) are respectively provided with a grabbing actuator (14) and a positioning actuator (15), and the lower side of the grabbing actuator (14) is provided with an adhesive tape pressing block (16); The side wall of the adhesive tape support (5) is connected with an adhesive tape frame (501) through a high-resistance rotating shaft, the adhesive tape frame (501) is internally provided with a self-adaptive barrier wall adhesive tape (17), the self-adaptive barrier wall adhesive tape (17) comprises a double-layer base material (1701), a thermal expansion compensation layer is formed between the double-layer base material (1701), a memory alloy framework (1702) is arranged in the thermal expansion compensation layer, the memory alloy framework (1702) is used for compensating thermal expansion and cold contraction of a pure copper coil in a working process, the surface of the double-layer base material (1701) is coated with a modified magnetorheological layer (1703), and the surface of the modified magnetorheological layer (1703) is coated with a pressure-sensitive adhesive (1704).

2. The power transformer winding coating and winding all-in-one machine according to claim 1, characterized in that, The upper surface of the storage block (9) is provided with a plurality of limiting clamping grooves matched with the winding framework (3), which is used for limiting the winding framework (3) in the process of stepping conveying, and the upper surface of the storage block (9) is provided with a blade groove matched with the cutting adhesive tape blade (11), which is used for compensating the distance of the cutting adhesive tape blade (11) in the grabbing process.

3. The power transformer winding coating and winding all-in-one machine according to claim 1, characterized in that, The traction assembly comprises a distance compensation rod (18), one end of the distance compensation rod (18) is fixedly connected with the side wall of the storage block (9), and the other end of the distance compensation rod (18) is provided with a traction clamp (19) used for traction of the self-adaptive barrier wall adhesive tape (17).

4. The power transformer winding coating and winding all-in-one machine according to claim 1, characterized in that, The side of the grabbing actuator (14) facing the positioning actuator (15) is provided with two inner supporting plates (20) matched with the winding framework (3), the inner supporting plates (20) are internally provided with permanent magnet columns (21), the permanent magnet columns (21) are fixedly connected with the grabbing actuator (14), and are used for enhancing the adhesion of the self-adaptive barrier wall adhesive tape (17).

5. The power transformer winding coating and winding all-in-one machine according to claim 4, characterized in that, Two inner support plates (20) are oppositely inclined, the outer diameter of the two inner support plates (20) is smaller than the inner diameter of the winding framework (3) so that the two inner support plates (20) can pass through the winding framework (3), and the inner side wall of each of the two inner support plates (20) is fixedly connected with an inner support driving piece (22) for supporting the inner support plate (20), and the two inner support plates (20) are in interference fit with the winding framework (3) in the supporting state to fix the winding framework (3).

6. The power transformer winding coating and winding all-in-one machine according to claim 4, characterized in that, The positioning actuator (15) is provided with a pressing clamping groove matched with the winding framework (3) on one side of the gripping actuator (14), and the center of the positioning actuator (15) is provided with a top block (23) matched with the inner support driving piece (22), the inner support driving piece (22) is deformed by the top block (23) to drive the inner support plate (20) to be supported.

7. The power transformer winding coating and winding all-in-one machine according to claim 1, characterized in that, The glue separating assembly comprises a support plate (24), and a limiting clamping jaw (25) is mounted on one side of the support plate (24) facing the gripping actuator (14), the tension of the self-adaptive retaining wall adhesive tape (17) is clamped and guaranteed, and a precondition is provided for the cutting blade (11) to cut the self-adaptive retaining wall adhesive tape (17).

8. The manufacturing method of a power transformer winding encapsulation all-in-one machine according to any one of claims 1-7, characterized in that, The method comprises the following steps: S1, raw material pretreatment: the polyimide film is treated by plasma surface treatment as a base material, the polyimide film base material needs to be prepared in two groups, the memory alloy framework (1702) is trained by using a Ni-Ti alloy wire for shape memory training, the shape memory training is used for presetting a compensation deformation amount, and the premix of the modified magnetorheological layer (1703) is formed by mixing modified carbonyl iron powder, silicone oil and nanosilica; S2, preparation of thermal expansion compensation layer: a micro-gravure coating process is used to form an interval limiting point array on the bottom base material, the memory alloy framework (1702) is arranged and fixed in the gap of the limiting point array, and the upper base material is covered and then subjected to hot pressing and compounding; S3, modified magnetorheological layer (1703) coating: the premix in S1 is coated on the upper base material by using a slot coating process, and then subjected to UV curing; S4, pressure sensitive adhesive (1704) coating: after the modified magnetorheological layer (1703) is cured, the pressure sensitive adhesive (1704) is coated thereon and dried; S5, product processing: the self-adaptive retaining wall adhesive tape (17) prepared is cut into a tape shape matching the winding framework (3) in width, and then wound, the tension in the winding process is less than 2 Newton, irreversible deformation of the memory alloy framework (1702) is prevented, and the self-adaptive retaining wall adhesive tape (17) is manufactured.

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