Shock-resistant and vibration-damping dry-type transformer iron core
By setting a buffer structure between the clamping plates and blocks of the dry-type transformer core, using elastic and damping components to absorb vibration, and combining the buffer structure with a limiting structure to protect the buffer structure, the problem of core damage caused by severe vibration during transportation is solved, and stable transportation of the core is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUANCHENG SHENBIAN TRANSFORMER CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-15
AI Technical Summary
During transportation, the core of a dry-type transformer is subject to severe external vibrations, which can easily cause the buffer structure to be overloaded and develop structural cracks. Existing shock-absorbing and buffer structures are insufficient to protect the core under transportation conditions.
A shock-resistant and vibration-damping dry-type transformer core was designed. By setting a buffer structure between the clamping plate and the locking block, the elastic and damping components are used to absorb vibration, and the contraction of the elastic components is limited by the limiting structure to avoid unnecessary vibration and protect the buffer structure.
It effectively absorbs the magnetostrictive vibration of the iron core, protects the buffer structure, avoids structural damage caused by severe vibration during transportation, and ensures the stability and safety of the iron core during transportation.
Smart Images
Figure CN224248424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer equipment technology, specifically to a dry-type transformer core with impact resistance and vibration reduction. Background Technology
[0002] A transformer is a device that uses the principle of electromagnetic induction to change the voltage of alternating current. Its main components are the primary coil, secondary coil, and iron core. Transformers whose iron core and windings are not immersed in cooling oil but are cooled by air are called dry-type transformers. Dry-type transformers have strong short-circuit withstand capability, require less maintenance, have high operating efficiency, and high reliability, and are often used in high-rise buildings, airports, docks, and other similar locations.
[0003] However, transformer cores exhibit magnetostriction, resulting in inherent vibrations of 50-100Hz. Long-term operation can easily lead to loosening of clamps and insulation wear. While some technologies utilize shock-absorbing and buffering structures to address the magnetostriction of the core, these techniques are prone to causing damage during transportation. In such conditions, external vibrations are more severe, exceeding the buffering structure's protection limits. This can result in core impacts or overload of the buffering structure, potentially leading to structural cracks. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides a dry-type transformer core that is resistant to impact and vibration reduction.
[0005] The technical solution of this utility model is:
[0006] A shock-resistant and vibration-damping dry-type transformer core, comprising:
[0007] A transformer assembly includes an iron core, with a winding wrapped around its center. The winding is coaxially arranged in inner and outer layers. Fixing frames are provided on the front and rear sides of the iron core. Each fixing frame includes clamping plates for clamping the upper and lower parts of the iron core. A tensile plate is provided between the upper and lower clamping plates. The outer ends of the tensile plate are engaged with the clamping plates via locking blocks. A shock-absorbing assembly is provided between the locking blocks and the clamping plates. The shock-absorbing assembly includes a buffer structure for absorbing vibrations caused by magnetostriction of the iron core. A limit structure is detachably installed on the outer side of the buffer structure for limiting the operation of the buffer structure.
[0008] Preferably, the clamping plate includes two upper clamping plates and two lower clamping plates. The lower clamping plates are made of channel steel and have outward openings. The upper and lower clamping plates are respectively installed on the upper and lower parts of the iron core by fastening bolts, which penetrate the iron core.
[0009] Preferably, the lower edge of the back of the upper clamping plate and the upper edge of the back of the lower clamping plate are provided with slots running through them, and the locking block is inserted into the interior of the upper and lower clamping plates through the slots.
[0010] Preferably, the card block is hollow, with one side of the card block abutting against the inner bottom surface of the upper clamping plate and the inner top surface of the lower clamping plate, and the other side having a gap between the upper clamping plate and the lower clamping plate. The buffer structure is located between the gap between the card block and the clamping plate.
[0011] Preferably, the buffer structure includes a connecting bolt, the end of which passes through the clamping plate, is inserted into the inside of the locking block, and is threaded with a locking nut. Two sliding washers are slidably installed in the middle of the connecting bolt and between the locking block and the clamping plate, and an elastic element is provided between the sliding washers.
[0012] Preferably, the elastic element has a damping element inside, which is used to absorb vibration.
[0013] Preferably, the limiting structure includes a limiting plate, which is snapped between the sliding pads. When the limiting plate is not removed, the two sliding pads abut against the locking block and the clamping plate, respectively.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This invention addresses the issue of core expansion and contraction by installing a locking block at the end of the tensile plate, which engages the clamping plate with a gap between them. This prevents the clamping plates from moving away from each other while accommodating the expansion and contraction of the iron core. A buffer structure utilizes the elastic force of the elastic element to meet the core expansion and contraction needs, and a damping element to absorb and reduce vibration, achieving shock absorption and preventing the clamping parts from loosening. A limiting plate restricts the movement of the sliding pad, preventing the elastic element from contracting and limiting its movement during transportation, thus preventing damage to the buffer structure. Attached Figure Description
[0016] Figure 1 This is a first schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a second schematic diagram of the overall structure of this utility model;
[0018] Figure 3 This is an exploded view of the iron core and fixing frame structure in this utility model;
[0019] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;
[0020] Figure 5 This is an exploded view of the shock-absorbing component structure in this utility model.
[0021] The meanings of the labels in the diagram are as follows:
[0022] 1. Transformer assembly; 11. Iron core; 12. Winding; 13. Spacer block; 14. Connecting wire;
[0023] 2. Fixed frame; 21. Upper clamping plate; 22. Lower clamping plate; 23. Tensile plate; 24. Block; 25. Slot; 26. Tightening bolt; 27. Foot pad;
[0024] 3. Shock absorption component; 31. Connecting bolt; 32. Sliding gasket; 33. Elastic component; 34. Damping component; 35. Card slot; 36. Limit card plate; 37. Locking nut. Specific implementation mode
[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0026] Embodiment 1:
[0027] Please refer to Figure 1-5 , the above technical solutions of the present invention will be described in detail through the following embodiments:
[0028] A dry-type transformer core with impact resistance and shock absorption, comprising:
[0029] A voltage transformation component 1, the voltage transformation component 1 includes an iron core 11, a winding 12 is wrapped in the middle of the iron core 11, the winding 12 is divided into two coaxial inner and outer layers, fixed frames 2 are provided on the front and rear sides of the iron core 11, the fixed frames 2 include clamping plates, the clamping plates are used to clamp the upper and lower parts of the iron core 11, a tensile plate 23 is provided between the upper and lower clamping plates, both ends of the tensile plate 23 are externally clamped with the clamping plates through blocks 24, and a shock absorption component 3 is provided between the blocks 24 and the clamping plates. The shock absorption component 3 includes a buffer structure, the buffer structure is used to absorb the vibration caused by the magnetostriction of the iron core 11, and a limit structure is detachably installed outside the buffer structure, and the limit structure is used to limit the operation of the buffer structure.
[0030] The iron core 11 is divided into upper and lower parts. The lower part is in the shape of a "mountain", and the upper part is in the shape of a "one". Both the upper and lower parts are made of stacked silicon steel sheets, and the upper and lower parts are clamped.
[0031] There are three groups of windings 12 in total, each group includes two parts of a high-voltage winding and a low-voltage winding, and the low-voltage winding is located inside the high-voltage winding.
[0032] A cushion block 13 is fixedly installed between the top of the winding 12 and the clamping plate through bolts, and the cushion block 13 is used to adjust the height of the winding 12. The outside of the winding 12 is wrapped with a resin insulation layer.
[0033] The windings 12 are connected through a connecting wire 14.
[0034] The clamping plate includes two upper clamping plates 21 and two lower clamping plates 22. The lower clamping plates 22 are made of channel steel and have an opening facing outward. The upper clamping plates 21 and lower clamping plates 22 are respectively installed on the upper and lower parts of the iron core 11 by fastening bolts 26, which penetrate through the iron core 11.
[0035] The upper clamping plate 21 clamps the upper half of the iron core 11, and the lower clamping plate 22 clamps the lower part of the lower half of the iron core 11.
[0036] A foot 27 is fixedly installed below the lower clamping plate 22 by bolts. The foot 27 is used to support the transformer.
[0037] The tensile plate 23 is fixedly installed on the front and rear sides of the lower half of the iron core 11 by bolts.
[0038] The upper clamping plate 21 and the lower clamping plate 22 are provided with slots 25 running through them, and the locking block 24 is inserted into the upper clamping plate 21 and the lower clamping plate 22 through the slots 25.
[0039] The locking block 24 is welded to the front end of the tensile plate 23.
[0040] The thickness of the card block 24 is less than that of the slot 25, and the width is equal to that of the slot 25, allowing it to move along the axis of the slot 25.
[0041] The card block 24 is hollow. One side of the card block 24 abuts against the inner bottom surface of the upper clamping plate 21 and the inner top surface of the lower clamping plate 22, while the other side has a gap between it and the upper clamping plate 21 and the lower clamping plate 22. The buffer structure is located between the gap between the card block 24 and the clamping plate.
[0042] The locking block 24 can restrict the upper clamping plate 21 from moving upward and can restrict the lower clamping plate 22 from moving downward.
[0043] The buffer structure includes a connecting bolt 31. The end of the connecting bolt 31 passes through the clamping plate and is inserted into the inside of the clamping block 24 and is threaded with a locking nut 37. Two sliding washers 32 are slidably installed in the middle of the connecting bolt 31 and between the clamping block 24 and the clamping plate. An elastic element 33 is provided between the sliding washers 32.
[0044] The elastic element 33 is a helical spring. The elastic element 33 is sleeved on the connecting bolt 31, and the end face of the elastic element 33 abuts against the sliding washer 32.
[0045] When the iron core 11 expands and contracts magnetically, its length changes, which in turn causes the tensile plate 23 to change length. The elastic element 33 can then be compressed to accommodate the change in the length of the iron core 11, thus acting as a buffer.
[0046] The elastic element 33 has a damping element 34 inside, which is used to absorb vibration.
[0047] The damping element 34 is made of heat-resistant silicone. The damping element 34 is fitted on the elastic element 33 and fills the space between the helical springs. When the elastic element 33 deforms with the iron core 11, the damping element 34 can absorb excess vibration and play a role in shock absorption.
[0048] The limiting structure includes a limiting plate 36, which is snapped between the sliding pads 32. When the limiting plate 36 is not removed, the two sliding pads 32 abut against the locking block 24 and the clamping plate respectively.
[0049] The sliding pad 32 is symmetrically provided with a slot 35 on the side near the elastic member 33. The two ends of the limiting plate 36 are engaged with the slot 35 and can slide along the slot 35.
[0050] When the limiting plate 36 is engaged in the slot 35, it can limit the contraction of the elastic element 33, and avoid unnecessary vibration during transportation, which could damage the shock absorption component 3.
[0051] After being transported to the designated location and installed, the limit plate 36 can be pulled out to allow the elastic element 33 and the damping element 34 to work normally.
[0052] Working principle:
[0053] During transportation, the limiting plate 36 is inserted into the slot 35 to restrict the contraction of the elastic element 33, so that the transformer assembly 1, the fixing frame 2 and the shock absorption assembly 3 form a whole, avoiding unnecessary vibration of the shock absorption assembly 3.
[0054] After the goods are transported and installed, the limiting plate 36 is removed. At this point, the elastic element 33 and the damping element 34 can function normally.
[0055] Under the pressure of the weight of transformer assembly 1, elastic element 33 and damping element 34 will shrink to a certain extent.
[0056] When the iron core 11 undergoes magnetic expansion and contraction, or vibrates due to other reasons, the elastic element 33 can undergo elastic deformation to achieve buffering, and the damping element 34 can filter out small vibrations and convert elastic potential energy into internal energy to achieve shock reduction.
[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A shock-resistant and vibration-damping dry-type transformer core, characterized in that, include: A transformer assembly (1) includes an iron core (11), a winding (12) is wrapped in the middle of the iron core (11), the winding (12) is coaxially arranged in inner and outer layers, a fixing frame (2) is provided on the front and rear sides of the iron core (11), the fixing frame (2) includes a clamping plate, the clamping plate is used to clamp the upper and lower parts of the iron core (11), a tensile plate (23) is provided between the upper and lower clamping plates, the outer ends of the tensile plate (23) are connected to the clamping plate by a locking block (24), a shock-absorbing assembly (3) is provided between the locking block (24) and the clamping plate, the shock-absorbing assembly (3) includes a buffer structure, the buffer structure is used to absorb the vibration caused by the magnetostriction of the iron core (11), a limit structure is detachably installed on the outer side of the buffer structure, the limit structure is used to limit the operation of the buffer structure.
2. The shock-resistant and vibration-damping dry-type transformer core as described in claim 1, characterized in that: The clamping plate includes two upper clamping plates (21) and two lower clamping plates (22). The lower clamping plates (22) are made of channel steel and have an opening facing outward. The upper clamping plates (21) and lower clamping plates (22) are respectively installed on the upper and lower parts of the iron core (11) by fastening bolts (26), and the fastening bolts (26) penetrate the iron core (11).
3. The shock-resistant and vibration-damping dry-type transformer core as described in claim 2, characterized in that: The upper clamping plate (21) and the lower clamping plate (22) are provided with slots (25) running through the back of the lower clamping plate (21) and the front of the back of the lower clamping plate (22). The card block (24) is inserted into the upper clamping plate (21) and the lower clamping plate (22) through the slots (25).
4. The shock-resistant and vibration-damping dry-type transformer core as described in claim 3, characterized in that: The card block (24) is hollow. One side of the card block (24) abuts against the inner bottom surface of the upper clamping plate (21) and the inner top surface of the lower clamping plate (22). The other side has a gap between the upper clamping plate (21) and the lower clamping plate (22). The buffer structure is located between the gap between the card block (24) and the clamping plate.
5. The shock-resistant and vibration-damping dry-type transformer core as described in claim 4, characterized in that: The buffer structure includes a connecting bolt (31), the end of which penetrates through the clamping plate and is inserted into the inside of the locking block (24) and is threaded with a locking nut (37). Two sliding washers (32) are slidably installed in the middle of the connecting bolt (31) and between the locking block (24) and the clamping plate. An elastic element (33) is provided between the sliding washers (32).
6. The shock-resistant and vibration-damping dry-type transformer core as described in claim 5, characterized in that: The elastic element (33) is provided with a damping element (34) inside, which is used to absorb vibration.
7. The shock-resistant and vibration-damping dry-type transformer core as described in claim 5, characterized in that: The limiting structure includes a limiting plate (36), which is engaged with two sliding pads (32) at both ends. The height of the limiting plate (36) is equal to the gap height between the locking block (24) and the clamping plate.