CN113611506A - Trapezoidal double-layer electrostatic ring structure at end part of spiral coil and use method - Google Patents
Trapezoidal double-layer electrostatic ring structure at end part of spiral coil and use method Download PDFInfo
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- CN113611506A CN113611506A CN202110834484.XA CN202110834484A CN113611506A CN 113611506 A CN113611506 A CN 113611506A CN 202110834484 A CN202110834484 A CN 202110834484A CN 113611506 A CN113611506 A CN 113611506A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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Abstract
The invention relates to a trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil and a using method thereof, belonging to the technical field of transformers. The technical scheme is as follows: the inclined static ring (2) bottom of lower floor is the inclined plane, the inclination on inclined plane and the inclination phase-match of spiral coil end coil, upper ladder shape static ring (1) bottom is the plane, and the cross-section is under narrow wide trapezoidal, sets up a plurality of oil gap cushion blocks (3) between upper ladder shape static ring (1) and the inclined static ring (2) of lower floor, forms insulating oil duct, and the inclined static ring equipotential lead-out wire (4) of lower floor and the coil of upper ladder shape static ring equipotential lead-out wire (5) and spiral coil are gone out the head and are converged and be in the same place. The invention has the beneficial effects that: the inclined electrostatic rings on the lower layer enable the uneven electric field at the end of the coil to be even, the trapezoidal electrostatic rings on the upper layer improve the field intensity distribution between the coils, the upper electrostatic rings and the lower electrostatic rings are matched with each other, the end electric field distribution of the coils is effectively improved, the condition of high local field intensity is eliminated, and the safe operation of the transformer is guaranteed.
Description
Technical Field
The invention relates to a trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil and a using method thereof, belonging to the technical field of transformers.
Background
In the power transformer, the electric field distribution near the coil end is not uniform, so that the coil end has high local field intensity, the discharge phenomenon is easy to occur, and the transformer is damaged. For this reason, an electrostatic ring is generally provided at the coil end to make the electric field at the coil end uniform, thereby improving the insulation strength of the coil end. However, for the spiral coil, due to the limitation of the structure and the radial size of the smaller coil, the surface of the rectangular electrostatic ring still has the situation of higher local field strength, which is not favorable for the safe operation of the transformer.
Disclosure of Invention
The invention aims to provide a trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil and a using method thereof.
The invention adopts the following technical scheme:
the utility model provides a trapezoidal double-deck static ring structure of spiral coil tip, static ring divide into about two parts on spiral coil axial direction, are upper trapezoidal static ring and the oblique static ring of lower floor respectively, and the oblique static ring setting of lower floor is at the tip of spiral coil, and the oblique static ring bottom of lower floor is the inclined plane, the inclination on inclined plane and the inclination phase-match of spiral coil tip coil, upper trapezoidal static ring bottom are the plane, and the cross-section is under the narrow trapezoidal, sets up a plurality of oil clearance cushions between the oblique static ring of upper ladder shape static ring and lower floor, forms insulating oil duct, and upper trapezoidal static ring, the oblique static ring of lower floor and oil clearance cushion pass through the even ligature of ligature area and fix as an organic whole, and the coil that the oblique static ring equipotential lead-out wire of lower floor and upper ladder shape static ring equipotential lead-out wire and spiral coil go out the head and converge together.
And the equipotential outgoing line of the upper-layer trapezoidal electrostatic ring is led out from the inner diameter side of the upper-layer trapezoidal electrostatic ring along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
And the equipotential outgoing line of the lower inclined electrostatic ring is led out from the outer diameter side of the lower inclined electrostatic ring along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
A use method of a trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil adopts the double-layer electrostatic ring structure and comprises the following steps: the inclination of the inclined surface at the bottom of the lower inclined electrostatic ring is matched with the inclination of the coil at the end part of the spiral coil, and the electrode shape of the coil end part coil cake is improved by the lower inclined electrostatic ring; the trapezoidal structure of width under the narrow upper portion is adopted to upper trapezoidal electrostatic ring, effectively improves the tip electric field distribution of coil, eliminates the high condition of local field intensity that exists between the coil, and upper and lower two-layer electrostatic ring is mutually supported, has effectively improved the electric field distribution of spiral coil tip, has increased the insulation margin of transformer.
The invention has the beneficial effects that: the transformer is simple to manufacture and convenient to install, and can effectively improve the electric field distribution at the end part of the coil and strengthen the insulating strength at the end part of the transformer body; the structure of the upper and lower layers of electrostatic rings is adopted, the uneven electric field at the end part of the coil becomes even by the lower inclined electrostatic ring, the field intensity distribution between the coils is improved by the upper trapezoidal electrostatic ring, the upper and lower electrostatic rings are mutually matched, the end electric field distribution of the coils is effectively improved, the condition of high local field intensity is eliminated, and the safe operation of the transformer is ensured.
Drawings
FIG. 1 is a schematic front view of the structure of the embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention;
FIG. 3 is a schematic sectional view A-A of an embodiment of the present invention;
in the figure: the electrostatic ring structure comprises an upper-layer trapezoidal electrostatic ring 1, a lower-layer oblique electrostatic ring 2, an oil gap cushion block 3, a lower-layer oblique electrostatic ring equipotential outgoing line 4 and an upper-layer trapezoidal electrostatic ring equipotential outgoing line 5.
Detailed Description
The invention is further described with reference to the following figures and examples.
A trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil is characterized in that an electrostatic ring is divided into an upper part and a lower part in the axial direction of the spiral coil, the upper part is a trapezoidal electrostatic ring 1, the lower part is an inclined electrostatic ring 2, the inclined electrostatic ring 2 is arranged at the end part of the spiral coil, the bottom of the inclined electrostatic ring 2 is an inclined plane, the inclination on inclined plane and the inclination phase-match of spiral coil end coil, 1 bottom of upper trapezoidal static ring is the plane, the cross-section is narrow trapezoidal down, set up a plurality of oil clearance cushion blocks 3 between 1 of upper trapezoidal static ring and the oblique static ring 2 of lower floor, form insulating oil duct, upper trapezoidal static ring 1, the oblique static ring 2 of lower floor and oil clearance cushion block 3 are fixed as an organic whole through the even ligature of ligature area, the oblique static ring equipotential lead-out wire 4 of lower floor and the coil of upper trapezoidal static ring equipotential lead-out wire 5 and spiral coil go out the head and converge together.
And the equipotential outgoing line 5 of the upper-layer trapezoidal electrostatic ring is led out from the inner diameter side of the upper-layer trapezoidal electrostatic ring 1 along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
And the equipotential lead-out wire 4 of the lower inclined electrostatic ring is led out from the outer diameter side of the lower inclined electrostatic ring 2 along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
A use method of a trapezoidal double-layer electrostatic ring structure at the end part of a spiral coil adopts the double-layer electrostatic ring structure and comprises the following steps: the inclination of the inclined surface at the bottom of the lower inclined electrostatic ring 2 is matched with the inclination of the coil at the end part of the spiral coil, and the electrode shape of the coil end part coil cake is improved by the lower inclined electrostatic ring 2; the upper trapezoidal electrostatic ring 1 adopts the trapezoidal structure of width under the narrow upper portion, effectively improves the tip electric field distribution of coil, eliminates the high condition of local field intensity that exists between the coil, and upper and lower two-layer electrostatic ring mutually supports, has effectively improved the electric field distribution of spiral coil tip, has increased the insulation margin of transformer.
In the embodiment, the inclination of the inclined surface at the bottom of the lower inclined electrostatic ring 2 is matched with the inclination of the coil at the end part of the spiral coil, and the electrode shape of the coil end part coil cake is improved by the lower inclined electrostatic ring 2; the upper trapezoidal electrostatic ring 1 adopts the trapezoidal structure of width under the narrow upper portion, effectively improves the tip electric field distribution of coil, eliminates the high condition of local field intensity that exists between the coil, and upper and lower two-layer electrostatic ring mutually supports, has effectively improved the electric field distribution of spiral coil tip, has increased the insulation margin of transformer.
Claims (4)
1. The utility model provides a trapezoidal double-deck static ring structure of spiral coil tip which characterized in that: the electrostatic ring is divided into an upper part and a lower part in the axial direction of the spiral coil, the upper part is a trapezoidal electrostatic ring (1) and the lower part is an inclined electrostatic ring (2), the inclined electrostatic ring (2) is arranged at the end part of the spiral coil, the bottom of the inclined electrostatic ring (2) is an inclined plane, the inclination on inclined plane and the inclination phase-match of spiral coil end coil, upper ladder shape static ring (1) bottom is the plane, the cross-section is narrow trapezoidal down, set up a plurality of oil clearance cushion (3) between upper ladder shape static ring (1) and the oblique static ring of lower floor (2), form insulating oil duct, upper ladder shape static ring (1), the oblique static ring of lower floor (2) and oil clearance cushion (3) are fixed as an organic whole through the even ligature of ligature area, the oblique static ring equipotential lead-out wire of lower floor (4) and upper ladder shape static ring equipotential lead-out wire (5) and the coil of spiral coil are gone out the head and are converged and be in the same place.
2. The trapezoidal double-layer electrostatic ring structure for a helical coil end of claim 1, wherein: and the equipotential outgoing line (5) of the upper-layer trapezoidal electrostatic ring is led out from the inner diameter side of the upper-layer trapezoidal electrostatic ring (1) along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
3. The trapezoidal double-layer electrostatic ring structure for a helical coil end according to claim 1 or 2, wherein: and the equipotential lead-out wire (4) of the lower inclined electrostatic ring is led out from the outer diameter side of the lower inclined electrostatic ring (2) along the coil outlet of the spiral coil and is connected with a lead corresponding to the coil outlet of the spiral coil.
4. A method of using a trapezoidal double-layer electrostatic ring structure for a helical coil end portion, using the double-layer electrostatic ring structure defined in any one of claims 1 to 3, characterized by comprising the steps of: the inclination of the inclined surface at the bottom of the lower inclined electrostatic ring (2) is matched with the inclination of the coil at the end part of the spiral coil, and the electrode shape of the coil end part coil cake is improved by the lower inclined electrostatic ring (2); the upper-layer trapezoidal electrostatic ring (1) adopts a trapezoidal structure with a narrow upper part and a wide lower part, so that the electric field distribution at the end part of the coil is effectively improved, the condition of high local field intensity existing between the coils is eliminated, the upper layer electrostatic ring and the lower layer electrostatic ring are mutually matched, the electric field distribution at the end part of the spiral coil is effectively improved, and the insulation margin of the transformer is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834484.XA CN113611506B (en) | 2021-07-23 | 2021-07-23 | Trapezoidal double-layer electrostatic ring structure at end part of spiral coil and use method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834484.XA CN113611506B (en) | 2021-07-23 | 2021-07-23 | Trapezoidal double-layer electrostatic ring structure at end part of spiral coil and use method |
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| CN113611506A true CN113611506A (en) | 2021-11-05 |
| CN113611506B CN113611506B (en) | 2022-10-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503126A (en) * | 1966-03-17 | 1970-03-31 | Hawker Siddeley Dynamics Ltd | Method of making electrostatic screens,especially for toroidal transformers |
| CN202025625U (en) * | 2010-12-30 | 2011-11-02 | 保定天威集团有限公司 | Transformer electrostatic ring with nesting structure |
| CN107680780A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | A kind of loop construction of transformer |
| CN215578139U (en) * | 2021-07-23 | 2022-01-18 | 保定天威保变电气股份有限公司 | Trapezoidal double-layer electrostatic ring structure at end part of spiral coil |
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2021
- 2021-07-23 CN CN202110834484.XA patent/CN113611506B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503126A (en) * | 1966-03-17 | 1970-03-31 | Hawker Siddeley Dynamics Ltd | Method of making electrostatic screens,especially for toroidal transformers |
| CN202025625U (en) * | 2010-12-30 | 2011-11-02 | 保定天威集团有限公司 | Transformer electrostatic ring with nesting structure |
| CN107680780A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | A kind of loop construction of transformer |
| CN215578139U (en) * | 2021-07-23 | 2022-01-18 | 保定天威保变电气股份有限公司 | Trapezoidal double-layer electrostatic ring structure at end part of spiral coil |
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| CN113611506B (en) | 2022-10-21 |
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