CN218299572U - Elastic compression and anti-loosening structure for coil cushion block of dry-type transformer - Google Patents
Elastic compression and anti-loosening structure for coil cushion block of dry-type transformer Download PDFInfo
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- CN218299572U CN218299572U CN202221526363.5U CN202221526363U CN218299572U CN 218299572 U CN218299572 U CN 218299572U CN 202221526363 U CN202221526363 U CN 202221526363U CN 218299572 U CN218299572 U CN 218299572U
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- bolt
- dry
- cushion block
- type transformer
- bushing
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- 238000007906 compression Methods 0.000 title claims description 12
- 230000006835 compression Effects 0.000 title claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002788 crimping Methods 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007907 direct compression Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a transformer technical field, it specifically discloses a dry-type transformer coil cushion elasticity compresses tightly anti loosening structure, including the folder of fixed mounting on the iron core, set up the cushion on the coil to and the elasticity hold-down mechanism of connecting folder and cushion, elasticity hold-down mechanism includes bolt, bush and disc spring, is provided with the mounting hole on the folder, bush and mounting hole sliding fit, and disc spring suit is in the outside of bolt, the bottom and the cushion crimping cooperation of bolt. The utility model discloses a dry-type transformer coil cushion elasticity compresses tightly anti loosening structure, coil pressurized state that can remain throughout to prevent that the coil from appearing not hard up risk.
Description
Technical Field
The utility model relates to a transformer technical field especially relates to a dry-type transformer coil cushion elasticity compresses tightly anti loosening structure.
Background
When the traditional resin-cast dry-type transformer is assembled, the high-low voltage coil and the cushion block are rigidly connected through direct compression of bolts, the high-low voltage coil and the cushion block are suitable for occasions with slight and medium impact loads, the heavy impact loads are not reliable in looseness prevention, and the coils are easy to shift in lifting and transportation, so that the normal use of the transformer is influenced, and the high-low voltage coil is not suitable for large-vibration use scenes in industries such as wind power, ships and the like. For example, in the utility model patent with publication number CN208256436U, it discloses a transformer coil cushion block anti-loosening structure, when using, assemble annular gasket, disc spring and locknut on the bolt respectively, screw the bolt into the bush, the bolt head of bolt can stop disc spring and annular gasket axially this moment, adjust the length of bolt through locknut, make annular gasket and cushion contact, have the interval between the bolt head of bolt and the recess of cushion simultaneously, the disc spring is in the compression state and stores energy this moment. When the transformer vibration jolts, the clamp force of folder to the cushion changes, disc spring elastic deformation this moment, the disc spring passes through annular gasket and directly transmits the effort between folder and cushion, make enough clamp force have between folder and the cushion, avoid bolt and cushion not hard up, but adopt screw-thread fit's rigid connection mode between bolt and the bush in this anti loosening structure, when the vibration is great, the relative bush of bolt can rotate, make the relative folder of bolt upwards move, still can take place the risk that the bolt can not effectively compress tightly the cushion this moment.
Disclosure of Invention
The utility model discloses aim at solving one of the above-mentioned technical problem at least, provide a dry-type transformer coil cushion elasticity and compress tightly anti loosening structure, adopt the mode that elasticity compressed tightly, coil pressurized state that can remain throughout to prevent that the coil from appearing not hard up risk.
In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a dry-type transformer coil cushion elasticity compresses tightly anti loosening structure, includes the folder of fixed mounting on the iron core, the cushion of setting on the coil to and the elasticity hold-down mechanism of connecting folder and cushion, elasticity hold-down mechanism includes bolt, bush and belleville spring, bolt and bush screw-thread fit, be provided with the mounting hole on the folder, bush and mounting hole sliding fit, belleville spring suit is in the outside of bolt, its upper end and the lower surface butt of folder, the lower extreme and the locating part butt of screw-thread mounting on the bolt, the bottom and the cushion crimping cooperation of bolt.
Preferably, the elastic pressing mechanism further comprises a nut and a gasket, and the nut, the gasket and the bushing are sequentially in threaded connection with the bolt from top to bottom.
Preferably, the upper surface and the lower surface of the washer are respectively provided with a first inclined tooth surface and a second inclined tooth surface, the first inclined tooth surface can be embedded into the nut, and the upper end of the bushing is provided with a third inclined tooth surface in clamping fit with the second inclined tooth surface.
Preferably, a gasket is arranged on the cushion block, and the lower end of the bolt is in press fit with the gasket.
Preferably, the cushion block is provided with a first groove for placing a gasket.
Preferably, the middle part of the gasket is provided with a second groove, and the lower end of the bolt is in press fit with the second groove.
Preferably, the first oblique tooth surface and the second oblique tooth surface respectively comprise a plurality of oblique teeth which are uniformly distributed around the axis of the gasket.
Preferably, the third beveled tooth surface comprises a plurality of beveled teeth on the upper end surface of the bushing disposed about the axis of the bushing.
Preferably, the bushing is T-shaped, and the third inclined tooth surface is arranged at one end of the bushing with a small outer diameter.
Preferably, the limiting part is a flange nut which is in threaded connection with the bolt.
The beneficial effects are that: compared with the prior art, the utility model discloses a dry-type transformer coil cushion elasticity compresses tightly check structure adopts bush, bolt, disc spring and locating part to construct an elasticity check structure, through threaded connection bush on the bolt for sliding fit between bolt and the folder, when producing the vibration, under the effect of disc spring elasticity, make the lower extreme of bolt can play the effect that elasticity compressed tightly, thereby make the lower extreme of bolt can remain throughout the compression state to the coil, appear not hard up risk with preventing the coil.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural view of an elastic pressing and anti-loosening structure of a coil cushion block of a dry-type transformer of the present invention;
FIG. 2 is a schematic view of the bushing;
fig. 3 is a schematic structural view of the gasket.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or there can be intervening components, and when a component is referred to as being "disposed in the middle," it is not just disposed in the middle, so long as it is not disposed at both ends, but rather is within the scope of the middle. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, an elastic pressing and anti-loosening structure for a coil cushion block of a dry-type transformer comprises a clamp 2 fixedly mounted on an iron core 1, a cushion block 4 arranged on the coil 3, and an elastic pressing mechanism connecting the clamp 2 and the cushion block 4, wherein the elastic pressing mechanism comprises a bolt 5, a bushing 8 and a belleville spring 9, the bolt 5 is in threaded fit with the bushing 8, a mounting hole 13 is formed in the clamp 2, the bushing 8 is in sliding fit with the mounting hole 13, the belleville spring 9 is sleeved outside the bolt 5, the upper end of the belleville spring abuts against the lower surface of the clamp 2, the lower end of the belleville spring abuts against a limiting part 14 arranged on the bolt 5 in a threaded manner, and the bottom end of the bolt 5 is in compression fit with the cushion block 4.
The utility model discloses a dry-type transformer coil cushion elasticity compresses tightly anti loosening structure adopts bush 8, bolt 5, disc spring 9 and locating part 14 to construct an elasticity anti loosening structure, through threaded connection bush 8 on bolt 5, make sliding fit between bolt 5 and the folder 2, when producing the vibration, under the effect of disc spring 9 elasticity, make the lower extreme of bolt 5 can play the effect that elasticity compressed tightly, thereby make the lower extreme of bolt 5 can guarantee the state that compresses tightly to coil 3 all the time, in order to prevent that not hard up risk from appearing in coil 3.
In a preferred embodiment, the elastic pressing mechanism may further include a nut 6 and a washer 7, the nut 6, the washer 7 and the bushing 8 are all provided with threaded holes so that the nut 6, the washer 7 and the bushing 8 can be sequentially and threadedly connected to the bolt 5 from top to bottom, further, the upper surface and the lower surface of the washer 7 are respectively provided with a first inclined tooth surface 10 and a second inclined tooth surface 11, the first inclined tooth surface 10 can be embedded in the nut 6, the upper end of the bushing 8 is provided with a third inclined tooth surface 12 in snap fit with the second inclined tooth surface 11 so that the nut 6, the washer 7 and the bushing 8 cannot rotate independently relative to the bolt 5, and the bolt 5 can be effectively prevented from loosening relative to the bushing 8, the nut 6 and the washer 7 during vibration by threadedly assembling the bushing 8, the nut 6 and the washer 7 on the bolt 5, and by engaging the inclined tooth surfaces of the bushing 8 and the nut 6.
In another preferred embodiment, a gasket 15 may be disposed on the cushion block 4, and the lower end of the bolt 5 is in press fit with the gasket 15 to prevent the surface of the cushion block 4 from being damaged when the lower end of the bolt 5 is in press fit with the cushion block 4. Further, a first groove 16 for placing the gasket 15 can be formed in the cushion block 4, and the gasket 15 is limited by the first groove 16, so that the gasket 15 is prevented from sliding out of the lower end of the bolt 5. Furthermore, the middle part of the gasket 15 can be provided with a second groove 17, the lower end of the bolt 5 is in press fit with the second groove 17, and the second groove 17 is matched with the bolt 5, so that the movement of the gasket 15 can be better limited.
In one specific embodiment, the first and second sloped tooth surfaces 10 and 11 may each include a plurality of sloped teeth uniformly arranged around the axis of the washer 7; the third beveled tooth surface 12 may also include a plurality of beveled teeth on the upper end surface of the bushing 8 disposed about the axis of the bushing 8. More specifically, the bushing 8 may be T-shaped, a through hole is formed in the middle of the bushing along the axis direction of the bushing, the through hole has a large aperture at one end and a small aperture at the other end, the thread is disposed at the end with the small aperture, and the third inclined tooth surface 12 is disposed at the end with the small outer diameter of the bushing 8.
In a more preferred embodiment, the limiting member 14 may be a flange nut screwed on the bolt 5, and the flange nut has better fastening performance and can achieve a better anti-loose effect.
During assembly, the belleville spring 9 is sleeved on the bushing 8, the bushing 8 penetrates into the mounting hole 13, the nut 6 and the washer 7 are mounted on the bolt 5, the bolt 5 is screwed into the bushing 8, the flange nut is screwed, the gasket 15 is placed in the first groove 16 of the cushion block 4, the flange nut is locked according to the calculated torque, the belleville spring 9 is compressed, the bushing 8 is fixed by a wrench, the bolt 5 is screwed, the nut 6 is locked, the torque is well exerted, the cushion block 4 and the coil 3 are pressed by using the elastic force generated by compression deformation of the belleville spring 9, the specially designed bushing 8 and the washer 7 are matched with the nut 6, when the nut is screwed, the helical teeth on one side of the washer 7 with the helical teeth on the other side are matched with the third helical teeth of the bushing 8, the helical teeth on the other side can be embedded into the lower surface of the nut 6 in the screwing process, and a permanent anti-loosening effect is achieved by using a bevel principle. After the dry-type transformer passes the verification of a vibration test, the performance is reliable, and the dry-type transformer can stably run for a long time under various conditions such as lifting, transportation, vibration and the like.
The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a dry-type transformer coil cushion elasticity compresses tightly anti-loosening structure, including folder (2) of fixed mounting on iron core (1), set up cushion (4) on coil (3), and connect the elasticity hold-down mechanism of folder (2) and cushion (4), a serial communication port, elasticity hold-down mechanism includes bolt (5), bush (8) and belleville spring (9), bolt (5) and bush (8) screw-thread fit, be provided with mounting hole (13) on folder (2), bush (8) and mounting hole (13) sliding fit, belleville spring (9) suit is in the outside of bolt (5), its upper end and the lower surface butt of folder (2), the lower extreme and screw-thread mounting are in locating part (14) butt on bolt (5), the bottom and cushion (4) crimping cooperation of bolt (5).
2. The dry-type transformer coil cushion block elastic compression anti-loosening structure as claimed in claim 1, wherein the elastic compression mechanism further comprises a nut (6) and a washer (7), and the nut (6), the washer (7) and the bushing (8) are sequentially in threaded connection with the bolt (5) from top to bottom.
3. The dry-type transformer coil cushion block elastic compression anti-loose structure is characterized in that the upper surface and the lower surface of the gasket (7) are respectively provided with a first inclined tooth surface (10) and a second inclined tooth surface (11), the first inclined tooth surface (10) can be embedded into the nut (6), and the upper end of the bushing (8) is provided with a third inclined tooth surface (12) in clamping fit with the second inclined tooth surface (11).
4. The dry-type transformer coil cushion block elastic pressing anti-loosening structure as claimed in claim 1, wherein a gasket (15) is arranged on the cushion block (4), and the lower end of the bolt (5) is in press fit with the gasket (15).
5. The dry-type transformer coil cushion block elastic pressing anti-loosening structure as claimed in claim 4, characterized in that the cushion block (4) is provided with a first groove (16) for placing a gasket (15).
6. The dry-type transformer coil cushion block elastic pressing anti-loosening structure as claimed in claim 5, wherein a second groove (17) is formed in the middle of the gasket (15), and the lower end of the bolt (5) is in press fit with the second groove (17).
7. The dry-type transformer coil cushion block elastic compression anti-loose structure as claimed in claim 3, wherein the first oblique tooth surface (10) and the second oblique tooth surface (11) comprise a plurality of oblique teeth uniformly distributed around the axis of the gasket (7).
8. The dry-type transformer coil cushion block elastic pressing anti-loosening structure as claimed in claim 7, wherein the third inclined tooth surface (12) comprises a plurality of inclined teeth arranged around the axis of the bushing (8) on the upper end surface of the bushing (8).
9. The dry-type transformer coil cushion block elastic compression anti-loosening structure as claimed in claim 1, wherein the bushing (8) is T-shaped, and the third inclined tooth surface (12) is arranged at one end of the bushing (8) with a small outer diameter.
10. The dry-type transformer coil cushion block elastic compression anti-loosening structure as claimed in claim 1, wherein the limiting member (14) is a flange nut screwed on the bolt (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221526363.5U CN218299572U (en) | 2022-06-17 | 2022-06-17 | Elastic compression and anti-loosening structure for coil cushion block of dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221526363.5U CN218299572U (en) | 2022-06-17 | 2022-06-17 | Elastic compression and anti-loosening structure for coil cushion block of dry-type transformer |
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| Publication Number | Publication Date |
|---|---|
| CN218299572U true CN218299572U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221526363.5U Active CN218299572U (en) | 2022-06-17 | 2022-06-17 | Elastic compression and anti-loosening structure for coil cushion block of dry-type transformer |
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| Country | Link |
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| CN (1) | CN218299572U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4589610A1 (en) * | 2024-01-16 | 2025-07-23 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer with said system |
| EP4589611A1 (en) * | 2024-01-16 | 2025-07-23 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer with said system |
-
2022
- 2022-06-17 CN CN202221526363.5U patent/CN218299572U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4589610A1 (en) * | 2024-01-16 | 2025-07-23 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer with said system |
| EP4589611A1 (en) * | 2024-01-16 | 2025-07-23 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer with said system |
| WO2025153215A1 (en) * | 2024-01-16 | 2025-07-24 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer with said system |
| WO2025153219A1 (en) * | 2024-01-16 | 2025-07-24 | Hitachi Energy Ltd | Coil block fixation system for a transformer and transformer |
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