Transformer winding and three-phase transformer
By setting circumferentially spaced protrusions and grooves on the meshing surfaces of the upper and lower coils of the transformer winding, the problem of coil displacement during transportation of traditional transformer windings is solved, achieving higher heat dissipation efficiency and vibration resistance, while simplifying the installation process.
Patent Information
- Application Number
- CN202520059229.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In traditional split-type dry transformers, the upper and lower coils of the same-phase transformer winding are prone to displacement during transportation, which leads to a decrease in heat dissipation performance and partial discharge characteristics. Existing solutions increase installation complexity and have poor reliability.
Multiple protrusions are provided on the meshing surfaces of the upper and lower coils of the transformer winding. The protrusions are distributed circumferentially along the meshing surfaces and match the corresponding grooves. When inserted, they fit tightly and ensure that the coil is stable in the horizontal direction.
It improves the concentricity and alignment of the coil, enhances heat dissipation efficiency and vibration resistance, simplifies the installation process, reduces the risk of fixation failure, and is suitable for harsh environments.
Smart Images
Figure CN223884243U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field especially relates to a transformer winding and three -phase transformer. BACKGROUND
[0002] In the structure of the conventional split dry-type transformer, the upper and lower coils of the same phase transformer winding are prone to displacement during transportation, which leads to misalignment of the air passages between the upper and lower coils, affecting the heat dissipation performance and partial discharge characteristics of the transformer. The existing solution is to install additional fixing devices, such as buckles, gaskets or filling materials, between the upper and lower coils to prevent displacement. However, these methods usually require additional materials or steps, increasing the complexity of installation. Moreover, they may fail due to vibration during long-term use, resulting in complexity and poor reliability. SUMMARY
[0003] The main purpose of the utility model is to provide a transformer winding and three -phase transformer, which aims to solve the technical problem of complex structure and poor reliability of the existing transformer.
[0004] To achieve the above-mentioned purpose, the utility model provides a transformer winding, which comprises two coils distributed vertically, and the opposite end faces of the two coils are engagement surfaces. Each engagement surface protrudes to form a plurality of protrusions towards the other engagement surface. The protrusions are spaced apart along the circumference of the corresponding engagement surface. A groove is formed between any two adjacent protrusions on each engagement surface. The number of protrusions on any engagement surface is consistent with the number of grooves on the other engagement surface. The shapes of the protrusions and grooves correspond to each other. Each protrusion on one engagement surface is inserted into the corresponding groove on the other engagement surface to enable the two coils to engage.
[0005] In an embodiment, the shapes and sizes of the protrusions on each coil are consistent, and the protrusions on each coil are uniformly spaced apart.
[0006] In an embodiment, the shapes of the protrusions and grooves on the same coil correspond to each other.
[0007] In an embodiment, each protrusion comprises a convex surface facing away from the engagement surface and two side surfaces opposite along the circumference. Both side surfaces extend along the radial direction of the coil. Each convex surface on one engagement surface is in contact with the other engagement surface, and each side surface on one engagement surface is in contact with the corresponding side surface on the other engagement surface.
[0008] In an embodiment, each engagement surface and each convex surface is a plane.
[0009] In an embodiment, each of the protrusions is tapered in a direction of protrusion thereof along a circumferential dimension of the corresponding engagement surface.
[0010] In an embodiment, an angle between at least one of the side surfaces of each of the protrusions and the engagement surface on the same coil is obtuse.
[0011] In an embodiment, an angle between each of the side surfaces of each of the protrusions and the engagement surface on the same coil is obtuse and equal.
[0012] In an embodiment, each of the engagement surfaces is provided with a plurality of protrusions protruding towards another of the engagement surfaces.
[0013] The utility model also provides a three -phase transformer, its characterized in being three -phase transformer includes three -phase core, be provided with transformer winding as above on the three -phase core.
[0014] The transformer winding of the utility model, through being provided with a plurality of protrusions on the opposite engagement surfaces of the upper and lower coils in the transformer winding, and the plurality of protrusions are spaced apart along the circumferential direction of the engagement surface, and the recess is formed between the two adjacent protrusions, when the upper and lower coils are butted, the protrusion of the upper coil is inserted into the recess of the lower coil, so that the upper and lower coils are closely fitted, and the contact area between the two coils is greatly improved, so that the structure of the two coils in the horizontal direction is more stable, the relative transverse shaking or displacement of the upper and lower coils in the transportation process can be effectively prevented, the higher concentricity and alignment degree of the upper and lower coils are realized, the heat dissipation air ducts of the upper and lower coils are aligned, the heat dissipation efficiency of the transformer winding is ensured, and the anti-vibration performance of the transformer winding is stronger, is suitable for operation in various severe environments, and does not need to use buckle, gasket or other additional materials, and the installation is more convenient, and the fixed failure risk caused by material aging or improper installation is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creating labor.
[0016] Fig. 1 The structural schematic diagram of an embodiment of the transformer winding provided by the utility model is shown in the figure.
[0017] Fig. 2 The structural schematic diagram of the coil in an embodiment of the transformer winding provided by the utility model is shown in the figure.
[0018] Fig. 3 The utility model provides a transformer winding one embodiment main view of coil.
[0019] Explanation of reference numerals:
[0020] 100, transformer winding; 1, coil; 11, engaging surface; 111, protrusion; 1111, convex surface; 1112, side surface; 112, recess.
[0021] The utility model discloses the realization, functional characteristics and advantages will be further explained in conjunction with the embodiment, with reference to the drawings. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0023] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.
[0024] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0025] In a conventional split dry-type transformer structure, the upper and lower coils of the in-phase transformer winding are prone to displacement during transportation, which causes misalignment of the air passages between the upper and lower coils, affecting the heat dissipation performance and partial discharge characteristics of the transformer, and the existing solution is to install additional fixing devices, such as buckles, gaskets or filling materials, between the upper and lower coils to prevent displacement, but these methods usually require additional materials or steps, increasing the complexity of installation, and may also fail due to vibration in long-term use, which not only complicates the installation, but also has poor reliability.
[0026] The utility model provides a kind of transformer winding 100.
[0027] Please refer to Figs. 1 to 3 In an embodiment of the utility model, the transformer winding 100 includes two coils 1 distributed vertically, and the opposite end faces of the two coils 1 are engagement surfaces 11. Each engagement surface 11 protrudes towards the other engagement surface 11 to form a plurality of protrusions 111. The plurality of protrusions 111 are spaced apart along the circumference of the corresponding engagement surface 11. A groove 112 is formed between any two adjacent protrusions 111 on each engagement surface 11. The number of protrusions 111 on any one engagement surface 11 is consistent with and corresponds one-to-one to the number of grooves 112 on the other engagement surface 11. The protrusions 111 and grooves 112 correspondingly arranged are shape-matched, and each protrusion 111 of one engagement surface 11 is inserted into the corresponding groove 112 on the other engagement surface 11, so that the two coils 1 are engaged.
[0028] The transformer winding 100 of the utility model sets a plurality of protrusions 111 on the opposite engagement surfaces 11 of the upper and lower coils 1 in the transformer winding 100, and the plurality of protrusions 111 are spaced apart along the circumference of the engagement surface 11. A groove 112 is formed between any two adjacent protrusions 111. When the upper and lower coils 1 are butted, the protrusions 111 of the upper coil 1 are inserted into the grooves 112 of the lower coil 1, so that the upper and lower coils 1 are tightly attached, and the contact area between the two coils 1 is greatly increased, making the structure of the two coils 1 in the horizontal direction more stable. It can effectively prevent the relative lateral shaking or displacement of the upper and lower coils 1 during transportation, achieve higher concentricity and alignment of the upper and lower coils 1, ensure the alignment of the heat dissipation air passages of the upper and lower coils 1, guarantee the heat dissipation efficiency of the transformer winding 100, and the transformer winding 100 has stronger vibration resistance, is suitable for operation in various harsh environments, and does not need to use buckles, gaskets or other additional materials, so the installation is more convenient. At the same time, it reduces the risk of fixation failure due to material aging or improper installation, and has better reliability.
[0029] In an embodiment, the plurality of protrusions 111 on each coil 1 are uniform in shape and size, and the plurality of protrusions 111 on each coil 1 are evenly spaced. Understandably, the plurality of protrusions 111 on each coil 1 are uniform in shape and size, so that the manufacturing process is more standardized, easy to realize automatic production and quality control, which helps to reduce the error in the production of the coil 1, improve the consistency and reliability of the quality of the coil 1; and further reduce the complexity of the protrusion 111 structure, when the upper and lower coils 1 are assembled, the protrusions 111 on the upper coil 1 can be inserted into any groove 112 of the lower coil 1 to complete the assembly, greatly simplifying the assembly process; the evenly distributed protrusions 111 can ensure that when the upper and lower coils 1 are docked, the pressure of the meshing surface 11 is evenly distributed, which can avoid the deformation or damage of part of the protrusions 111 of the coil 1 due to the too large vibration amplitude during transportation, and prolong the service life.
[0030] In an embodiment, on the same coil 1, the protrusions 111 and the grooves 112 are matched in shape. Understandably, the protrusions 111 and the grooves 112 on the same coil 1 can ensure that the upper and lower coils 1 are precisely aligned when they are docked, and the protrusions 111 and the grooves 112 are uniform in size, ensuring that the vibration force is evenly dispersed during transportation, and the structure is more reliable.
[0031] In an embodiment, each protrusion 111 includes a convex surface 1111 facing away from the meshing surface 11 and two circumferentially opposite side surfaces 1112, both of which extend in the radial direction of the coil 1, wherein each convex surface 1111 on one meshing surface 11 is attached to the other meshing surface 11, and one side surface 1112 on one meshing surface 11 is attached to the corresponding side surface 1112 on the other meshing surface 11.
[0032] Understandably, the convex surface 1111 is attached to the meshing surface 11 of the other coil 1, which maximizes the contact area between the two coils 1, improves the docking accuracy, and the two side surfaces 1112 are attached to the corresponding side surfaces 1112, which further enhances the mechanical connection strength between the coils 1 and ensures the stability of the coils 1 in all directions, especially in the radial and circumferential directions; it should be noted that the side surface 1112 of the protrusion 111 can also be regarded as the groove wall of the groove 112, that is, the two side surfaces 1112 of the protrusion 111 on one meshing surface 11 are attached to the two side walls of the corresponding groove 112 on the other meshing surface 11, thereby increasing the contact area between the upper and lower coils 1, not only enhancing the friction, but also making the upper and lower coils 1 more stable and firmly attached, which can effectively prevent the relative displacement between the upper and lower coils 1.
[0033] Further, both side surfaces 1112 of each protrusion 111 are flat, which is conducive to the rapid docking of the upper and lower coils 1.
[0034] In an embodiment, each engaging surface 11 and each convex surface 1111 is a plane, which is conducive to the quick docking of the upper and lower coils 1 and the quick docking of the engaging surface 11 and the convex surface 1111, and simplifies the manufacturing difficulty and is conducive to the production and manufacturing.
[0035] In an embodiment, the size of each convex projection 111 along the circumferential direction of the engaging surface 11 is tapered in the convex direction thereof. Understandably, each convex projection 111 can be understood as being arranged in a manner that the top is narrow and the bottom is wide, where the top refers to the portion of the convex projection 111 away from the top of the coil 1, and the bottom refers to the portion of the convex projection 111 connected to the bottom of the engaging surface 11, which is conducive to the quick docking of the upper and lower coils 1 and reduces the time cost required during assembly.
[0036] Further, each convex projection 111 further includes an inner side and an outer side opposite in the radial direction of the coil 1, where the inner side is the side close to the center of the coil 1, and the size of the convex projection 111 along the circumferential direction is gradually increased in the radial direction from the inner side to the outer side; and the plurality of convex projections 111 cooperate with each other to realize the stability of the upper and lower coils 1 in the radial direction.
[0037] In an embodiment, on the same coil 1, the included angle between at least one side surface 1112 of each convex projection 111 and the engaging surface 11 is obtuse. Understandably, the engaging surface 11 can be understood as the groove bottom of the groove 112, and the included angle between one of the side surfaces 1112 of the convex projection 111 and the groove bottom of the adjacent groove 112 is obtuse, and the included angle between the other side surface 1112 and the groove bottom of the adjacent groove 112 can be a right angle or an obtuse angle, so that each convex projection 111 is arranged in a manner that the top is narrow and the bottom is wide.
[0038] In an embodiment, on the same coil 1, the included angles between the two side surfaces 1112 of each convex projection 111 and the engaging surface 11 are both obtuse and equal. Understandably, the equal included angles between the two side surfaces 1112 and the engaging surface 11 mean that the two side surfaces 1112 are arranged in a manner of being opposite to each other, which ensures the structure to be beautiful and ensures the stress of the convex projection 111 to be evenly dispersed, and the structure is more stable.
[0039] In an embodiment, each engaging surface 11 is convexly provided with a plurality of convex projections 111 towards the other engaging surface 11. By arranging at least three convex projections 111, the stress is more dispersed, and the contact surface of the upper and lower coils 1 is wider and the stability is better.
[0040] Further, the height of the convex projection 111 relative to the engaging surface 11 is at least 10 mm.
[0041] In summary, by arranging the convex projections 111 on the opposite end surfaces of the upper and lower coils 1 of the transformer winding 100, the structure is more stable after the docking of the upper and lower coils 1, the relative shaking of the upper and lower coils 1 during transportation can be prevented, and the reliability is better.
[0042] The utility model discloses still a kind of three-phase transformer, the three-phase transformer includes three-phase core, and three-phase core is provided with the transformer winding 100 as above described. The specific structure of the transformer winding 100 refers to the above embodiment, since the subject two adopts all the technical solutions of the above all embodiments, at least has all beneficial effects brought by the technical scheme of the above embodiment, here will not be elaborated one by one.
[0043] The above is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure transformation using the utility model specification and the contents of drawings, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.
Claims
1. A transformer winding, characterized by The transformer winding comprises two coils distributed along a vertical direction, opposite end faces of the two coils are engagement faces, each engagement face is convex to the other engagement face to form a plurality of protrusions, the protrusions are distributed along a circumferential direction of the corresponding engagement face, a groove is formed between any two adjacent protrusions on the engagement face, the number of the protrusions on any engagement face is consistent with the number of the grooves on the other engagement face, the protrusions and the grooves are arranged correspondingly, the shapes of the protrusions and the grooves are matched, and each protrusion on one engagement face is inserted into the corresponding groove on the other engagement face to engage the two coils.
2. The transformer winding of claim 1, wherein, The shapes and sizes of the protrusions on each coil are consistent, and the protrusions on each coil are uniformly distributed.
3. The transformer winding of claim 2, wherein, On the same coil, the shapes of the protrusions and the grooves are matched.
4. The transformer winding of claim 1, wherein, Each protrusion comprises a convex surface away from the engagement face and two opposite side surfaces along the circumferential direction, the two side surfaces extend along a radial direction of the coil, each convex surface on one engagement face is in contact with the other engagement face, and each side surface on one engagement face is in contact with the corresponding side surface on the other engagement face.
5. The transformer winding of claim 4, wherein, Each engagement face and each convex surface is a plane.
6. The transformer winding of claim 5, wherein, The size of each protrusion along the circumferential direction of the corresponding engagement face is tapered towards the protrusion direction.
7. The transformer winding of claim 5, wherein, On the same coil, the included angle between at least one side surface on each protrusion and the engagement face is obtuse.
8. The transformer winding of claim 7, wherein, On the same coil, the included angles between the two side surfaces on each protrusion and the engagement face are obtuse and equal.
9. The transformer winding of any of claims 1 to 8, wherein, Each engagement face is convex to the other engagement face to form a plurality of protrusions.
10. A three-phase transformer, characterized by The three-phase transformer comprises a three-phase core, and the three-phase core is provided with the transformer winding according to any one of claims 1 to 9.