Iron core constraint structure of dry-type transformer
By using a constraint structure made of aluminum alloy, stainless steel and carbon fiber reinforced plastic, and utilizing an elastic network to adapt to the dynamic deformation of the dry-type transformer core, the problems of core loosening and increased noise are solved, and the operational stability and durability are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI PEOPLE POWER TRANSMISSION & TRANSFORMATION CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-28
AI Technical Summary
The core of existing dry-type transformers is prone to magnetostriction under electromagnetic force and thermal stress, which leads to deformation of silicon steel sheets. The existing constraint structure cannot adapt to dynamic deformation, which may result in core loosening, increased noise and insulation damage.
The constraint structure employs an aluminum alloy constraint seat, a stainless steel constraint plate, and a carbon fiber reinforced plastic connecting rod. Through an elastic network composed of springs and telescopic columns, it achieves multi-angle constraint on the expansion of the iron core, adapting to its dynamic deformation.
It effectively adapts to the dynamic deformation of the iron core, reduces local stress concentration, improves the durability and operational stability of the iron core, and reduces maintenance costs.
Smart Images
Figure CN224177196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of constraint structure technology, and in particular to a core constraint structure for a dry-type transformer. Background Technology
[0002] Dry-type transformers, as an important type of power equipment, are widely used in urban power distribution, rail transit, and industrial power supply due to their advantages such as good fire resistance and easy maintenance. The core, as the core component of a dry-type transformer, directly affects the transformer's energy efficiency and operational stability. However, in actual operation, under the long-term electromagnetic force and thermal stress, the silicon steel sheets are prone to magnetostriction, leading to cumulative deformation of the core. In severe cases, this can cause the core laminations to loosen, increase noise, or even damage the insulation. Existing core constraint structures mostly use rigid bolts for fixing, which cannot adapt to the dynamic deformation of the core during operation and easily cause local stress concentration, thus accelerating core damage. Utility Model Content
[0003] To overcome the above shortcomings, this utility model provides a core constraint structure for a dry-type transformer, aiming to improve the problem that the existing core constraint structure cannot adapt to the dynamic deformation of the core during operation.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: a core constraint structure for a dry-type transformer, comprising a core body, with constraint seats slidably connected to the upper and lower outer sides of the core body on both sides. Limiting grooves are formed on the front and rear sides of the constraint seats on both sides. Limiting blocks are slidably connected inside the limiting grooves. Constraint plates are slidably connected to the front and rear sides inside the constraint seats. Mounting sleeves are fixedly connected to opposite sides of the upper and lower constraint plates. An mounting groove is formed in the middle of the mounting sleeve, and a sliding groove is formed on the front side of the mounting sleeve. Mounting rods are fixedly connected to the left and right sides inside the mounting grooves. Springs are sleeved on the left and right sides of the mounting rods. Connecting components are slidably connected to the outside of the mounting rods for connecting the constraint structure. Limiting components are provided on the front and rear sides of the inner wall of the constraint seat for limiting the movement of the core body.
[0005] As a further description of the above technical solution:
[0006] The connecting assembly includes a slider, which is slidably connected to the left and right sides of the outside of the mounting rod. The front of the slider is fixedly connected to an mounting shaft on opposite sides. A connecting rod is rotatably connected to the outside of the mounting shaft, and a connecting shaft is rotatably connected to the middle of the connecting rod.
[0007] As a further description of the above technical solution:
[0008] The limiting component includes a telescopic column, which is fixedly connected to the front and rear sides of the inner wall of the constraint seat, and a spring is sleeved on the outside of the telescopic column.
[0009] As a further description of the above technical solution:
[0010] The constraint seat is made of aluminum alloy, the constraint plate is made of stainless steel, and the connecting rod is made of carbon fiber reinforced plastic.
[0011] As a further description of the above technical solution:
[0012] One end of the second spring is fixedly connected to the mounting rod, and the other end of the second spring is fixedly connected to the slider.
[0013] As a further description of the above technical solution:
[0014] The limiting blocks are fixedly connected to the left and right sides of the constraint plate.
[0015] As a further description of the above technical solution:
[0016] The slider is slidably connected to the mounting groove and the slide groove.
[0017] As a further description of the above technical solution:
[0018] One end of the spring is fixedly connected to the telescopic column, and the other end of the spring is fixedly connected to the mounting sleeve.
[0019] This utility model has the following beneficial effects:
[0020] 1. In this utility model, the expansion of the iron core body pushes the constraint seat and the mounting sleeve. The moving mounting sleeve squeezes the telescopic column and the spring. The constraint seat drives the limit block to move. The limit block drives the constraint plate to move. The constraint plate drives the mounting sleeve to move. The mounting sleeve drives the slider to move up and down. The slider pulls the connecting rod through the mounting shaft. This realizes that the constraint structure can constrain the iron core of the dry-type transformer from multiple angles, thereby adapting to the dynamic deformation of the iron core during operation.
[0021] 2. In this utility model, the lightweight and strength of the constraint seat are improved by using aluminum alloy material, the mechanical strength of the constraint plate is improved by using stainless steel material, and the lightweight and high strength of the connecting rod are ensured by using carbon fiber reinforced plastic material, thereby reducing the influence of inertia and improving the durability of the iron core constraint structure. Attached Figure Description
[0022] Figure 1 This is a perspective view of the core constraint structure of a dry-type transformer proposed in this utility model.
[0023] Figure 2This is a cross-sectional view of the mounting sleeve of the core constraint structure of a dry-type transformer proposed in this utility model.
[0024] Figure 3 for Figure 2 Enlarged view of point A in the image.
[0025] Legend:
[0026] 1. Iron core body; 2. Constraint seat; 3. Limiting groove; 4. Limiting block; 5. Constraint plate; 6. Telescopic column; 7. Spring 1; 8. Mounting sleeve; 9. Mounting groove; 10. Slide groove; 11. Sliding block; 12. Mounting rod; 13. Spring 2; 14. Mounting shaft; 15. Connecting rod; 16. Connecting shaft. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Reference Figures 1-3 This utility model provides an embodiment of a core constraint structure for a dry-type transformer, comprising a core body 1, with constraint seats 2 slidably connected to the upper and lower outer sides of the core body 1, and limit grooves 3 formed on the front and back of the left and right sides of the constraint seats 2. Limit blocks 4 are slidably connected inside the limit grooves 3. Constraint plates 5 are slidably connected to the front and back sides of the constraint seats 2. Limit blocks 4 are fixedly connected to the left and right sides of the constraint plates 5. Mounting sleeves 8 are fixedly connected to opposite sides of the upper and lower constraint plates 5. Mounting sleeves 8 have mounting grooves 9 in the middle and sliding grooves 10 on the front side of the mounting sleeves 8. Mounting rods 12 are fixedly connected to the left and right sides of the mounting grooves 9. Springs 13 are sleeved on the left and right sides of the mounting rods 12. One end of the springs 13 is fixedly connected to the mounting rods 12, and the other end of the springs 13 is fixedly connected to the sliding grooves 10. Block 11 is fixedly connected, and a connecting component is slidably connected to the outside of the mounting rod 12 for connecting the constraint structure. The connecting component includes a slider 11, which is slidably connected to the left and right sides outside the mounting rod 12. The front of the slider 11 is fixedly connected to the opposite side of the mounting shaft 14. The outside of the mounting shaft 14 is rotatably connected to the connecting rod 15, and the middle of the connecting rod 15 is rotatably connected to the connecting shaft 16. The slider 11 is slidably connected inside the mounting groove 9 and the sliding groove 10. Limiting components are provided on the front and rear sides of the inner wall of the constraint seat 2 for limiting the iron core body 1. The limiting components include a telescopic column 6, which is fixedly connected to the front and rear sides of the inner wall of the constraint seat 2. A spring 7 is sleeved on the outside of the telescopic column 6. One end of the spring 7 is fixedly connected to the telescopic column 6, and the other end of the spring 7 is fixedly connected to the mounting sleeve 8.
[0029] When the core body 1 expands radially, its expansion force first acts on the constraint seat 2 made of high-strength alloy steel. The displacement of the constraint seat 2 is transmitted to the mounting sleeve 8. The movement of the mounting sleeve 8 causes the telescopic column 6 and spring 7 to start working, generating a reverse constraint force on the core through the stiffness coefficient. At the same time, the displacement of the constraint seat 2 causes the limiting block 4 to slide. The limiting block 4 causes the constraint plate 5 to move. The constraint plate 5 causes the mounting sleeve 8 to move. The mounting sleeve 8 causes the slider 11 to move. The slider 11 pulls the connecting rod 15 through the mounting shaft 14. The connecting rod 15 pulls another slider 11 through another mounting shaft 14. The other slider 11 stretches the spring 13. The entire constraint system forms an elastic constraint network, which can automatically adjust the magnitude of the constraint force according to the core expansion amount and control the maximum expansion displacement range of the core. This realizes that the constraint structure can constrain the core of the dry-type transformer from multiple angles, thereby adapting to the dynamic deformation of the core during operation.
[0030] Reference Figures 1-3 The constraint seat 2 is made of aluminum alloy, the constraint plate 5 is made of stainless steel, and the connecting rod 15 is made of carbon fiber reinforced plastic.
[0031] By using aluminum alloy to improve the lightness and strength of the constraint seat 2, weight reduction is achieved while ensuring load-bearing capacity. By using stainless steel to improve the mechanical strength of the constraint plate 5, and by using carbon fiber reinforced plastic to ensure the lightness and high strength of the connecting rod 15, the effects of inertia are reduced, and stable mechanical performance is ensured throughout the entire life cycle. This improves the durability of the iron core constraint structure and significantly reduces maintenance costs.
[0032] Working principle: When the core of the dry-type transformer expands, the expansion of the core body 1 pushes the constraint seat 2 and the mounting sleeve 8. The mounting sleeve 8 moves and squeezes the telescopic column 6 and spring 7. The telescopic column 6 and spring 7 squeeze the core body 1 of the dry-type transformer. The constraint seat 2 drives the limit block 4 to move. The limit block 4 drives the constraint plate 5 to move. The constraint plate 5 drives the mounting sleeve 8 to move. The mounting sleeve 8 drives the slider 11 to move up and down. The slider 11 pulls the connecting rod 15 through the mounting shaft 14. The connecting rod 15 pulls another slider 11 through another mounting shaft 14, causing the slider 11 to move and pull the spring 13. This realizes that the constraint structure can constrain the core of the dry-type transformer from multiple angles, thereby adapting to the dynamic deformation of the core during operation.
[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A core constraint structure for a dry-type transformer, comprising a core body (1), characterized in that: The iron core body (1) is slidably connected to the upper and lower sides of the outer left and right sides of the constraint seat (2). The constraint seat (2) has a limit groove (3) on the front and back sides of the left and right sides. The limit groove (3) is slidably connected to the limit block (4). The constraint seat (2) is slidably connected to the front and back sides of the inner side of the constraint seat (2). The upper and lower sides of the constraint plate (5) are fixedly connected to the opposite side of the constraint plate (5). The middle of the mounting sleeve (8) is provided with a mounting groove (9). The front side of the mounting sleeve (8) is provided with a sliding groove (10). The left and right sides of the inner side of the mounting groove (9) are fixedly connected to the mounting rod (12). The left and right sides of the outer side of the mounting rod (12) are fitted with springs (13). The outer side of the mounting rod (12) is slidably connected to a connecting component for connecting the constraint structure. The inner wall of the constraint seat (2) is provided with a limit component on the front and back sides for limiting the iron core body (1).
2. The core constraint structure of a dry-type transformer according to claim 1, characterized in that: The connecting assembly includes a slider (11), which is slidably connected to the left and right sides of the mounting rod (12). The front of the slider (11) is fixedly connected to the opposite side of the mounting shaft (14). The mounting shaft (14) is rotatably connected to the outside of the mounting shaft (14), and the middle of the mounting shaft (15) is rotatably connected to the connecting shaft (16).
3. The core constraint structure of a dry-type transformer according to claim 1, characterized in that: The limiting component includes a telescopic column (6), which is fixedly connected to the front and rear sides of the inner wall of the constraint seat (2), and a spring (7) is sleeved on the outside of the telescopic column (6).
4. The core constraint structure of a dry-type transformer according to claim 2, characterized in that: The constraint seat (2) is made of aluminum alloy, the constraint plate (5) is made of stainless steel, and the connecting rod (15) is made of carbon fiber reinforced plastic.
5. The core constraint structure of a dry-type transformer according to claim 1, characterized in that: One end of the second spring (13) is fixedly connected to the mounting rod (12), and the other end of the second spring (13) is fixedly connected to the slider (11).
6. The core constraint structure of a dry-type transformer according to claim 1, characterized in that: The limiting block (4) is fixedly connected to the left and right sides of the constraint plate (5).
7. The core constraint structure of a dry-type transformer according to claim 2, characterized in that: The slider (11) is slidably connected inside the mounting groove (9) and the slide groove (10).
8. The core constraint structure of a dry-type transformer according to claim 3, characterized in that: One end of the spring (7) is fixedly connected to the telescopic column (6), and the other end of the spring (7) is fixedly connected to the mounting sleeve (8).