Cushion block structure for press fitting of transformer coil
By designing connecting slots on the pad structure, especially the third slot protruding toward the middle or being rectangular, friction is reduced, solving the problem of unevenness caused by high friction during the press-fitting of the transformer coil, and improving press-fitting efficiency and time efficiency.
Patent Information
- Application Number
- CN202422821260.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In the prior art, the friction between the pads and the stays is relatively large, resulting in an unsmooth press-fitting process for the transformer coil, low press-fitting efficiency, and difficulty in reaching the final height within the specified time.
A pad structure for transformer coil press-fitting is designed. A connecting groove is provided on the pad body. The connecting groove includes first, second and third slot bodies. The third slot body protrudes toward the middle or is rectangular, reducing the contact area with the support bar to reduce friction.
By reducing the friction between the pads and the stays, the smoothness and efficiency of the press-fitting process are improved, allowing the coil to reach its final height within the specified time.
Smart Images
Figure CN223486858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer coil press-fitting technology, specifically to a pad structure for press-fitting transformer coils. Background Technology
[0002] Currently, in transformer manufacturing, disc coils typically rely on insulating supports and spacers to form the coil's skeleton structure. The supports primarily function as mechanical supports between windings and also to secure the spacers. The spacers, threaded onto the supports, mainly form radial cooling oil channels between winding segments (discs) and provide inter-segment insulation. The spacers also transmit the axial clamping force of the coil. The combination of supports and spacers forms the coil's own axial and radial oil channels for heat dissipation and provides support against axial and radial forces during short circuits.
[0003] In the aforementioned skeleton structure, the support bars and spacers are interlocked to form the skeleton structure. When winding the coil using this skeleton structure, multiple spacers need to be threaded onto each support bar. After the coil is wound, it needs to be press-fitted to ensure that the coil is stably and securely fixed inside the transformer and maintains good electrical and mechanical properties.
[0004] Reference Figure 1 and Figure 2 , Figure 1 This is a top view diagram of a pad block structure in the prior art. Figure 2 This is a schematic cross-sectional view of the existing technology after the pad and support bar are inserted. During pressing, the pad moves downward along the length of the support bar. The resistance during the pressing process is divided into two parts: one part is the compression resistance of the wire and the pad, and the other part is the frictional force between the support bar and the pad. The frictional force between the support bar and the pad accounts for a large proportion of the total pressing resistance. The high frictional force between the pad and the support bar in the existing technology leads to an uneven pressing process, low coil pressing efficiency, and difficulty in making the coil reach its final height within the specified drying time. Utility Model Content
[0005] To address the technical problem in the prior art where the friction between the pad and the support bar is too large, resulting in an unsmooth pressing process, low coil pressing efficiency, and difficulty in ensuring the coil reaches its final height within the specified drying time, this utility model provides a pad structure for pressing transformer coils.
[0006] To achieve the above objectives, the technical solution adopted by the transformer coil press-fitting pad structure in this utility model is as follows:
[0007] The beneficial effects of this utility model include:
[0008] A pad structure for press-fitting transformer coils includes a pad body, a connecting groove is formed on one side wall of the pad body, the connecting groove extends through the thickness direction of the pad body; along the direction toward the middle of the pad body, the connecting groove includes a first groove, a second groove and a third groove; the width direction of the connecting groove is set along the length direction of the side wall on the pad body where the connecting groove is located, the width of the first groove is smaller than the width of the second groove, and the width of the second groove is larger than the width of the third groove.
[0009] With the above structural design, the contact area between the pad body and the support bar in this utility model is small. During the pressing process, the friction between the pad body and the support bar is small, making the pressing process smoother, improving the coil pressing efficiency, and enabling the coil to reach the final height within the specified drying time.
[0010] As a preferred implementation of a pad structure for press-fitting transformer coils, the third groove is an arc-shaped groove that protrudes towards the center of the pad body.
[0011] The above structural design makes the arc-shaped groove easy to process and reduces costs.
[0012] In a preferred embodiment of a pad structure for press-fitting transformer coils, the maximum dimension of the third groove in the direction toward the center of the pad body is 0.5 mm.
[0013] By adopting the above structural scheme, a gap can be formed between the support bar and the pad block body, and the adverse effects of opening the third groove on the structural strength of the pad block body can be reduced.
[0014] As a preferred implementation of a pad structure for press-fitting transformer coils, the third groove is a rectangular groove.
[0015] The above structural design allows for easy processing of rectangular grooves at a lower cost.
[0016] In a preferred embodiment of a pad structure for press-fitting transformer coils, the third groove has a dimension of 0.5 mm in the direction toward the center of the pad body.
[0017] By adopting the above structural scheme, a gap can be formed between the support bar and the pad block body, and the adverse effects of opening the third groove on the structural strength of the pad block body can be reduced.
[0018] As a preferred implementation of a pad structure for press-fitting transformer coils, a number of third slots are provided, and the number of third slots are arranged along the width direction of the second slot.
[0019] As a preferred implementation of a pad structure for press-fitting transformer coils, the connecting groove has a symmetrical structure.
[0020] The beneficial effects of this utility model include:
[0021] In this invention, the contact area between the pad body and the support bar is small, resulting in less friction between them during the pressing process. This makes the pressing process smoother, improves the coil pressing efficiency, and allows the coil to reach its final height within the specified drying time. Attached Figure Description
[0022] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0023] Figure 1 This is a top view of the pad structure in the prior art;
[0024] Figure 2 This is a schematic cross-sectional view of the structure after the pad and the support strip are inserted in the prior art.
[0025] Figure 3 This is a top view of the pad structure for pressing the transformer coil in Example 1;
[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the pad block body and the support strip after insertion in Example 1;
[0027] Figure 5 This is a top view of the structure of the pad used for pressing the transformer coil in Example 2;
[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the pad block body and the support strip after insertion in Example 2;
[0029] Figure 7 This is a top view schematic diagram of the pad structure for pressing the transformer coil in Example 3;
[0030] Figure 8 This is a schematic cross-sectional view of the pad block body and the support strip after they are connected in Example 3.
[0031] List of components and reference numerals:
[0032] 1. Pad body; 2. Connecting groove; 21. First groove; 22. Second groove; 23. Third groove; 3. Support bar. Detailed Implementation
[0033] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0034] Example 1:
[0035] Reference Figure 3-4 This embodiment proposes a pad structure for press-fitting transformer coils, including a pad body 1. A connecting groove 2 is formed on one side wall of the pad body 1. The connecting groove 2 has a symmetrical structure and extends through the thickness direction of the pad body 1. Along the direction towards the center of the pad body 1, the connecting groove 2 includes a first groove 21, a second groove 22, and a third groove 23. The width direction of the connecting groove 2 is set along the length direction of the side wall on the pad body 1 where the connecting groove 2 is located. The width of the first groove 21 is smaller than the width of the second groove 22, and the width of the second groove 22 is larger than the width of the third groove 23. The third groove 23 is an arc-shaped groove that protrudes towards the center of the pad body 1. The maximum dimension of the third groove 23 in the direction towards the center of the pad body 1 is 0.5 mm.
[0036] The working principle of this embodiment is as follows:
[0037] The support bar 3 can only be inserted into the first groove 21 and the second groove 22. During the coil pressing process, the third groove 23 creates a gap between the pad body 1 and the support bar 3, reducing the contact area between the pad body 1 and the support bar 3, thereby reducing the friction between the pad body 1 and the support bar 3, making the pressing process smoother, improving the coil pressing efficiency, and enabling the coil to reach its final height within the specified drying time.
[0038] Example 2:
[0039] Reference Figure 5-6 This embodiment proposes a pad structure for press-fitting transformer coils. The difference between this embodiment and Embodiment 1 is that the third groove 23 is a rectangular groove, and the dimension of the third groove 23 in the direction toward the middle of the pad body 1 is 0.5mm.
[0040] Example 3:
[0041] Reference Figure 7-8 This embodiment proposes a pad structure for press-fitting transformer coils. The difference between this embodiment and embodiment 1 is that: there are several third grooves 23, and the several third grooves 23 are arranged along the width direction of the second groove 22.
[0042] Compared to Figure 1-2 In the existing pad structure, the contact area between the pad body 1 and the support bar 3 in embodiments 1, 2 and 3 is small. During the pressing process, the friction between the pad body 1 and the support bar 3 is small, making the pressing process smoother, improving the coil pressing efficiency, and enabling the coil to reach the final height within the specified drying time.
[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pad structure for press-fitting transformer coils, comprising a pad body (1), characterized in that: A connecting groove (2) is provided on one side wall of the pad body (1). The connecting groove (2) extends through the thickness direction of the pad body (1). Along the direction toward the middle of the pad body (1), the connecting groove (2) includes a first groove (21), a second groove (22), and a third groove (23). The width direction of the connecting groove (2) is set along the length direction of the side wall on the pad body (1) where the connecting groove (2) is located. The width of the first groove (21) is smaller than the width of the second groove (22), and the width of the second groove (22) is larger than the width of the third groove (23).
2. The structure of a pad for press-fitting transformer coils according to claim 1, characterized in that, The third groove (23) is an arc-shaped groove, and the third groove (23) protrudes towards the middle of the pad body (1).
3. The structure of a pad for press-fitting transformer coils according to claim 2, characterized in that, The maximum dimension of the third groove (23) in the direction toward the middle of the pad body (1) is 0.5 mm.
4. The structure of a pad for press-fitting transformer coils according to claim 1, characterized in that, The third groove (23) is a rectangular groove.
5. The structure of a pad for press-fitting transformer coils according to claim 4, characterized in that, The third groove (23) has a dimension of 0.5 mm in the direction toward the middle of the pad body (1).
6. The structure of a pad for press-fitting transformer coils according to claim 1, characterized in that, There are several third grooves (23), and several third grooves (23) are arranged along the width direction of the second groove (22).
7. The structure of a pad for press-fitting transformer coils according to claim 1, characterized in that, The connecting groove (2) has a symmetrical structure.