Gluing method for three-phase amorphous alloy solid volume core

Abstract

The present application relates to a kind of three-phase amorphous alloy three-dimensional winding core gluing method, it includes the following steps: 1.to the assembling surface of single frame core gluing;2.single frame core is spliced into three-phase amorphous alloy three-dimensional winding core;3.upper yoke portion and the surface of the core column gluing;4.after the curing of glue layer, three-phase amorphous alloy three-dimensional winding core is lifted, and lower yoke portion is glued.The application adopts the mode of landing first and then hanging, avoids the deformation of soft-state amorphous three-dimensional winding core in the traditional hanging gluing mode due to no external supporting force fixation, finally leads to the performance degradation of three-phase amorphous alloy three-dimensional winding core.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a coating method for three-phase amorphous alloy three-dimensional wound iron cores. Background Technology

[0002] In recent years, supported by the national "dual carbon" policy, new high-efficiency and energy-saving transformers have seen vigorous development. Amorphous alloy three-dimensional wound core transformers, as a typical example of new high-efficiency and energy-saving transformers, use iron-based amorphous metals for their cores. Their unit iron loss is reduced by 70%-80% compared to silicon steel, resulting in superior energy-saving and consumption-reducing effects compared to transformers with silicon steel cores. However, due to the characteristics of amorphous alloy materials, to ensure the performance requirements of no-load loss, no-load current, and noise levels for amorphous alloy three-dimensional wound core transformers, soft core structures are currently widely used.

[0003] For soft iron cores, an adhesive coating process is required on the outside of the core to form an external soft adhesive layer, which achieves the bonding of the core frame and the sealing of the core. A good adhesive coating method can effectively ensure the adhesive coating effect of the iron core, improve production efficiency, and guarantee the performance of the iron core.

[0004] Traditional silicon steel cores are usually applied by directly suspending and applying adhesive. However, soft amorphous three-dimensional coiled cores will deform during suspension due to the lack of external support, which will eventually lead to the deterioration of the performance of the amorphous three-dimensional coiled core. Summary of the Invention

[0005] Therefore, it is necessary to provide a coating method for three-phase amorphous alloy three-dimensional wound iron cores to address the problem that soft amorphous three-dimensional wound iron cores will deform during suspension due to the lack of external support, ultimately leading to performance degradation.

[0006] A method for applying adhesive to a three-phase amorphous alloy three-dimensional wound iron core, comprising the following steps:

[0007] Step 1: Apply adhesive to the assembly surface of the single-frame iron core in the ground state to form an adhesive layer; the single-frame iron core includes an upper yoke and a lower yoke that are opposite each other, and two column parts that are connected between the upper yoke and the lower yoke and are arranged opposite each other.

[0008] Step 2: Assemble the three single-frame iron cores into a three-phase amorphous alloy three-dimensional coiled iron core, and splice adjacent column sections to form a core column;

[0009] Step 3: Apply adhesive to the upper yoke of the single-frame core and the surface of the core column;

[0010] Step 4: After the adhesive layer on the upper yoke of the single-frame core and the surface of the core column has cured, lift the three-phase amorphous alloy three-dimensional coiled core and apply adhesive to the lower yoke of the single-frame core.

[0011] Furthermore, the step of applying adhesive to the assembly surface of the single-frame core specifically involves:

[0012] The assembly surfaces of the column are coated with adhesive in sections, and gaps are formed between the adhesive layers after curing.

[0013] Furthermore, the width of the gap is in the range of 5mm-50mm.

[0014] Furthermore, in step 2, before assembling the three-phase amorphous alloy three-dimensional wound core, insulating paper is placed on the assembly surface of the column.

[0015] Furthermore, the insulating paper is made of composite polyester film material and blue shell paper.

[0016] Furthermore, the single-frame core in step 1 is formed by disassembling the annealed three-phase amorphous alloy three-dimensional coiled core, and the three-phase amorphous alloy three-dimensional coiled core is kept in a grounded state when disassembling the three-phase amorphous alloy three-dimensional coiled core.

[0017] Furthermore, the splitting direction of the single-frame core is away from the center of the three-phase amorphous alloy three-dimensional coiled core.

[0018] Furthermore, the adhesive application method in steps 1, 3, and 4 is either brushing or spraying.

[0019] Furthermore, the adhesive layer is made of at least one of the following: silicone glass adhesive, epoxy adhesive, silicone rubber, polyurethane, rubber-based adhesive, hot melt adhesive, silane-terminated modified polymer, and polyurea.

[0020] Furthermore, the thickness of the adhesive layer applied to the single-frame core assembly surface in step 1 after curing is between 0.5mm and 20mm.

[0021] The above-mentioned coating method for the three-phase amorphous alloy three-dimensional coiled iron core adopts a method of first placing it on the ground and then suspending it. The assembly surface of the single-frame iron core in the ground state is coated, and then it is assembled. The upper yoke and column parts are coated. After the adhesive on the upper yoke and column surfaces has cured, the iron core is suspended and the lower yoke is coated with adhesive. At this time, the cured adhesive layer enhances the supporting effect of the iron core, avoiding the deformation of the soft amorphous three-dimensional coiled iron core due to the lack of external support force in the traditional suspension coating method, which ultimately leads to performance degradation. Attached Figure Description

[0022] Figure 1 A top view of a three-phase amorphous alloy three-dimensional wound core after annealing, in a coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0023] Figure 2A top view of a three-phase amorphous alloy three-dimensional wound core in a disassembled state, as described in the adhesive coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0024] Figure 3 A plan view of a single-frame core in a coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0025] Figure 4 This is a plan view of the single-frame core assembly surface after adhesive application in the adhesive application method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0026] Figure 5 This is a top view of the three-phase amorphous alloy three-dimensional wound core after reassembly in the adhesive coating method for the three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0027] Figure 6 This is a plan view of the other side of the single-frame core assembly surface in the adhesive coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0028] Figure 7 This is a plan view of the other side of the single-frame core assembly surface in the adhesive coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0029] Figure 8 A cross-sectional view of the center column of a coating method for a three-phase amorphous alloy three-dimensional wound core according to an embodiment of the present invention.

[0030] Figure 9 This is an enlarged view of point F in color 10;

[0031] In the diagram: 1-Three-phase amorphous alloy three-dimensional wound core; 10-Single-frame core; 11-Column; 12-Yoke; 13-Core column; 20-Glue layer; 30-Gap; 40-Insulating paper. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] See Figure 1 , Figure 1 The diagram shows a top view of a three-phase amorphous alloy three-dimensional wound core after annealing, according to a coating method for a three-phase amorphous alloy three-dimensional wound core based on an embodiment of the present invention. The amorphous alloy three-dimensional wound core is assembled from multiple single-frame cores 10. In this embodiment, the three-phase amorphous alloy three-dimensional wound core 1 is assembled from three single-frame cores 10. See also... Figure 3 , Figure 3 A plan view of a single-frame core 10 is shown. The single-frame core 10 is formed by winding amorphous alloy strip layer by layer. The single-frame core 10 is roughly a rectangular frame structure with rounded corners. The single-frame core 10 includes a longitudinally longer column portion 11 and a transversely shorter yoke portion 12. Two adjacent column portions 11 of the single-frame core 10 form a core column 13. The side of the single-frame core 10 facing the center of the amorphous alloy three-dimensional wound core is the assembly surface. The single-frame core 10 is formed by continuously winding several levels of amorphous alloy strips of different widths from the inside out. As a preferred embodiment, the number of levels of amorphous alloy strips is preferably 6-25. Specifically, the single-frame core 10 needs to first cut the amorphous alloy of a fixed width into strips of different widths according to a set program, where each level of strip can be rectangular or trapezoidal. It should be noted that during the winding process of the single-frame iron core 10, the strip is wound at a certain angle. In this embodiment, a 30° tilt angle is preferably used to wind the strip to ensure that the three single-frame iron cores 10 are spliced ​​into a three-phase amorphous alloy three-dimensional wound iron core 1, and the splicing surfaces are bonded to form a core column 13 with a near-circular cross-section. Furthermore, the wound single-frame iron core 10 also needs to be magnetically annealed to eliminate internal stress and avoid the generation of fragments, and the single-frame iron core 10 recovers its magnetism after annealing.

[0039] The steps for applying adhesive to the three-phase amorphous alloy three-dimensional wound core 1 are as follows:

[0040] 1. Place the annealed three-phase amorphous alloy three-dimensional wound iron core 1 on the disassembly and cleaning fixture. The annealed three-phase amorphous alloy three-dimensional wound iron core 1 is as follows: Figure 1 As shown.

[0041] Remove the steel hoops that fix the outer periphery of the core column 13 during furnace annealing, and clean the surface of the three-phase amorphous alloy three-dimensional coiled iron core 1.

[0042] 2. For example Figure 2 As shown, the three single-frame iron cores 10 of the three-phase amorphous alloy three-dimensional coiled iron core 1 are overflowed outward along the track direction to ensure the operating space when applying glue to the single frame of the iron core.

[0043] The direction of movement of the single-frame iron core 10 is away from the center of the three-phase amorphous alloy three-dimensional coiled iron core 1.

[0044] 3. For example Figure 4 As shown, adhesive is applied in sections on the assembly surface of the single-frame core 10 to form an adhesive layer 20, and the space reserved for the section adhesive application is distributed on the surface of the column 11.

[0045] 4. After the adhesive layer 20 on the surface to be assembled is cured, the splicing surface of the column 11 will have a gap 30 without adhesive due to the space reserved for the partitioned adhesive application.

[0046] 5. For example Figure 5 As shown, three single-frame iron cores 10 are moved towards the center and assembled into a three-phase amorphous alloy three-dimensional wound iron core 1. Insulating paper 40 is placed on the surface of the column portion 11 of the assembled piece. The insulating paper 40 is held by the column portions 11 on both sides and covers the surface of the gap 30. The insulating paper 40 and the gap 30 form a channel for cooling oil to pass through. The gap 30 connects the internal space of the three-phase amorphous alloy three-dimensional wound iron core 1 with the outside. During the transformer vacuum oil filling process, the gap 30 can release the internal stress of the three-phase amorphous alloy three-dimensional wound iron core 1 caused by the internal and external pressure difference, reducing the impact of internal stress on the performance of the three-phase amorphous alloy three-dimensional wound iron core 1. After the transformer is filled with oil, the gap 30 is also filled with cooling oil. The gap 30 filled with cooling oil can reduce the operating stress of the three-phase amorphous alloy three-dimensional wound iron core 1 during transformer operation, and facilitate the control of the no-load current of the three-phase amorphous alloy three-dimensional wound iron core 1, thus reducing the defect rate of the three-phase amorphous alloy three-dimensional wound iron core 1.

[0047] 6. Apply adhesive to the upper yoke 12 and the surface of the core column 13 of each single-frame core 10 (e.g., ...). Figure 6 (As shown). When the upper yoke 12 and core column 13 are coated with adhesive, the three-phase amorphous alloy three-dimensional wound iron core 1 is in a grounded state, which reduces the stress on the three-phase amorphous alloy three-dimensional wound iron core 1 and avoids deformation of the three-phase amorphous alloy three-dimensional wound iron core 1 due to stress.

[0048] 7. After the adhesive layer 20 on the surface of the upper yoke 12 and core column 13 of the single-frame core 10 has cured, lift the three-phase amorphous alloy three-dimensional wound core 1 and apply adhesive to the lower yoke 12 of the single-frame core 10 (e.g., ...). Figure 7(As shown). After the adhesive layer 20 on the surface of the upper yoke 12 and core column 13 of the single frame core 10 is cured, it provides a support layer with a certain hardness, which plays a role in improving the strength of the three-phase amorphous alloy three-dimensional wound core 1 and preventing the three-phase amorphous alloy three-dimensional wound core 1 from deforming due to its own weight during subsequent hoisting, which would eventually lead to performance degradation.

[0049] 8. After the adhesive layer 20 on the surface of the lower yoke 12 of the single-frame core 10 has cured, the three-phase amorphous alloy three-dimensional wound core 1 is removed. After the adhesive layer 20 on the surface of the lower yoke 12 of the single-frame core 10 has cured, it forms a support layer with a certain hardness together with the adhesive layer 20 cured on the upper yoke 12 of the single-frame core 10 and the core column 13 in step 7. This structure effectively improves the strength of the three-phase amorphous alloy three-dimensional wound core 1 while ensuring its performance, and improves the efficiency and effectiveness of the subsequent transformer production process. In addition, the adhesive layer 20 cured in steps 7 and 8 can serve as an internal support for the coil wound around the outer periphery of the core column 13, improving the short-circuit withstand capability of the transformer coil.

[0050] The above-mentioned adhesive application method for the three-phase amorphous alloy three-dimensional wound core 1 adopts a method of first landing and then suspending. The annealed three-phase amorphous alloy three-dimensional wound core is disassembled by dismantling the adhesive application fixture, allowing for coating of the assembled surfaces. Subsequently, the core is reassembled, and the upper yoke and column sections are coated. After the adhesive on the upper yoke and column surfaces has cured, the core is suspended, and the lower yoke is coated with the adhesive layer. At this point, the cured adhesive layer provides enhanced support for the core, preventing deformation of the soft amorphous three-dimensional wound core due to lack of external support, which can lead to performance degradation in traditional suspended adhesive application methods. The gap 30 facilitates the release of internal stress in the three-phase amorphous alloy three-dimensional wound core and avoids the impact of transformer vacuum oil injection on the three-phase amorphous alloy three-dimensional wound core.

[0051] Furthermore, the adhesive application method in steps 3, 6, and 7 can be either brushing or spraying. Furthermore, the curing time of adhesive layer 20 in steps 7 and 8 is at least 12 hours. Furthermore, the material of adhesive layer 20 in steps 3, 7, and 8 includes at least one of silicone sealant, epoxy adhesive, silicone rubber, polyurethane, rubber-based adhesive, hot melt adhesive, silane-terminated modified polymer, and polyurea. Furthermore, the material of adhesive layer 20 in steps 3, 7, and 8 can be the same material, or different materials can be used for each layer according to actual needs. Furthermore, adhesive layer 20 in steps 3, 7, and 8 can be a single layer or multiple layers; when multiple layers are used, the materials of each layer can be different. Furthermore, the adhesive layer 20 has a certain degree of permeability. The penetration depth of the adhesive layer 20 into the single-frame core 10 is generally no more than 5mm. The permeability of the adhesive layer 20 can reduce the impact of stress on the single-frame core 10 during the curing process, thus avoiding a decrease in the excitation and other performance characteristics of the three-phase amorphous alloy three-dimensional wound core 1. The adhesive layer 20 provides effective support for the single-frame core 10. When winding the three-phase amorphous alloy three-dimensional wound core 1, the traditional internal positioning silicon steel winding method can be used, eliminating the need for suspending the three-phase amorphous alloy three-dimensional wound core 1 to avoid deformation of the soft single-frame core 10 under stress. This simplifies the process and improves production efficiency. Furthermore, the hardness of the adhesive layer 20 is within the range of shoreA20-shoreD90. Setting the hardness of the adhesive layer 20 within this range can prevent the substrate from deforming or breaking during processing and transportation, which would lead to performance degradation of the three-phase amorphous alloy three-dimensional wound iron core 1. It can also ensure that the stress on the three-phase amorphous alloy three-dimensional wound iron core 1 is small, thus ensuring the excitation and other performance of the three-phase amorphous alloy three-dimensional wound iron core 1.

[0052] Specifically, the width of gap 30 is within the range of 15mm-20mm. Setting the width of gap 30 within this range can prevent the insulating paper 40 from wrinkling and deforming due to an excessively wide gap 30, thus avoiding blockage of gap 30, or prevent the cooling oil from having difficulty passing through gap 30 due to an excessively narrow gap 30. Specifically, the thickness of the adhesive layer 20 applied to the assembly surface of the single-frame core 10 in step 4 after curing is between 0.5mm-20mm, that is, the depth of gap 30 is between 0.5mm-20mm.

[0053] Specifically, see Figure 8 , Figure 8 A cross-sectional view of the center column 13 of a coating method for a three-phase amorphous alloy three-dimensional wound core 1 according to an embodiment of the present invention is shown. Figure 9As shown, insulating paper 40 is provided between the assembly surfaces of adjacent column portions 11. After the adjacent gaps 30 are assembled, the insulating paper 40 is sandwiched between the two gaps 30 on both sides. The two gaps 30 on both sides are independent of each other, which improves the problem of controlling the no-load current of the amorphous alloy three-dimensional wound iron core. Furthermore, the insulating paper 40 is made of composite polyester film material and blue shell paper.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for applying adhesive to a three-phase amorphous alloy three-dimensional wound iron core, characterized in that, The adhesive coating method for the three-phase amorphous alloy three-dimensional wound core includes the following steps: Step 1: Apply adhesive to the assembly surface of the single-frame iron core in its ground state to form an adhesive layer. The single-frame iron core includes an upper yoke and a lower yoke, and two columns connected between the upper yoke and the lower yoke and arranged opposite each other. The space reserved for the partitioned adhesive application is distributed on the surface of the columns. After the adhesive layer on the assembly surface cures, the surface of the assembly surface of the columns forms a gap without adhesive due to the space reserved for the partitioned adhesive application. Step 2: Assemble the three single-frame iron cores into a three-phase amorphous alloy three-dimensional coiled iron core, and splice adjacent column sections to form a core column; Before assembling the three-phase amorphous alloy three-dimensional wound core, insulating paper is placed on the assembly surface of the column. The insulating paper is held by the column on both sides and covers the gap surface. The insulating paper and the gap form a channel for cooling oil to pass through. Step 3: Apply adhesive to the upper yoke of the single-frame core and the surface of the core column; Step 4: After the adhesive layer on the upper yoke of the single-frame core and the surface of the core column has cured, lift the three-phase amorphous alloy three-dimensional coiled core and apply adhesive to the lower yoke of the single-frame core.

2. The coating method for a three-phase amorphous alloy three-dimensional wound core according to claim 1, characterized in that, The insulating paper is made of composite polyester film or blue-shell paper.

3. The coating method for a three-phase amorphous alloy three-dimensional wound core according to claim 1, characterized in that, The single-frame core in step 1 is formed by disassembling the annealed three-phase amorphous alloy three-dimensional coiled core. When disassembling the three-phase amorphous alloy three-dimensional coiled core, the three-phase amorphous alloy three-dimensional coiled core remains in a grounded state.

4. The coating method for a three-phase amorphous alloy three-dimensional wound core according to claim 3, characterized in that, The splitting direction of the single-frame core is away from the center of the three-phase amorphous alloy three-dimensional coiled core.

5. The coating method for a three-phase amorphous alloy three-dimensional wound core according to claim 1, characterized in that, The adhesive application methods in steps 1, 3, and 4 are either brushing or spraying.

6. The coating method for a three-phase amorphous alloy three-dimensional wound core according to claim 1, characterized in that, The thickness of the adhesive layer applied to the single-frame core assembly surface in step 1 after curing is between 0.5mm and 20mm.

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