CN201741545U - Transformer coil trapezoidal oil channel cushion block - Google Patents
Transformer coil trapezoidal oil channel cushion block Download PDFInfo
- Publication number
- CN201741545U CN201741545U CN2010205009743U CN201020500974U CN201741545U CN 201741545 U CN201741545 U CN 201741545U CN 2010205009743 U CN2010205009743 U CN 2010205009743U CN 201020500974 U CN201020500974 U CN 201020500974U CN 201741545 U CN201741545 U CN 201741545U
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- CN
- China
- Prior art keywords
- cushion block
- coil
- trapezoidal
- oil channel
- transposition
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- Expired - Fee Related
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Abstract
The utility model discloses a transformer coil trapezoidal oil channel cushion block. The oil channel cushion block is of a trapezoid shape. The utility model is characterized in that as the oil channel cushion block is of a trapezoid shape, when an electric transformer cake type low-voltage coil adopts a transposition wire or an autoadhesive transposition wire, the transposition space at the inner diameter of the low-voltage coil can be increased without a cross-stay transposition; in terms of conventional square-shaped oil channel cushion block, the circumference of the coil inner diameter turn of the coil and the coil outer diameter turn have quite a large difference, and the percentages of a cushion block compression area of the inner and outer diameter run taking up the whole turn area possess a large difference, thereby the compacting force is not even. The inner diameter side of the transformer coil is the short edge of the trapezoidal cushion block, the outer diameter side of the coil is the long edge of the trapezoidal cushion block, and the short edge is smaller than and the long edge is bigger than the width of the conventional square-shaped cushion block. Under the situation of ensuring heat dissipation property unchanged, the utility model is advantageous in that the percentage of each turn compression area is close to the same; the compacting force is even; mechanical strength is more reliable.
Description
Technical field
The utility model relates to a kind of transformer coil oil duct cushion block, especially a kind of power transformer disc coil oil duct cushion block.
Background technology
At present, power transformer is large-scale power transformer particularly, its capacity is big, often reach more than the 50000kVA, so the electric current of low-voltage coil is very big usually, generally reach more than the 2000A, so for the mechanical strength that improves low-voltage coil and reduce the wastage, often adopt the tack transposed conductor to carry out the coiling low-voltage coil.The tack transposed conductor is that (radical is generally 7～59 by certain radical, can reach 83 at most) the enamel-cover strip conductor be combined into two row that wide face is in contact with one another, on request on two row enamel-cover strip conductors and below do the same transposition that turns to along leptoprosopy, and it is closely wrapped continuously to make multilayer with electrician's insulating paper strip, and outside insulating barrier, be coated with adhesive, melt under hot bonding, thereby strengthen the mechanical strength of lead.But because tack transposed conductor sectional area is big, it is big to take up room during whole transposition, particularly adopts the disc coil structure, in the low-voltage coil between two bracing bars position less, after the oil duct cushion block had been installed, interchangeable bit space was just littler.Traditional method is to adopt to stride the stay transposition, i.e. transposition takies two stays at interval, and is unsettled for fear of the transposition lead, and the problem of bad mechanical strength need be carried out radial, axial compression to lead in transposition and be fixed.Because the transposition shape is inconsistent, so difficulty is bigger when being fixed.
Summary of the invention
At the deficiencies in the prior art, the utility model provides a kind of transformer coil simple in structure, that production cost is lower, mechanical strength is high and reliable trapezoidal oil duct cushion block.
For achieving the above object, the utility model provides a kind of transformer coil trapezoidal oil duct cushion block, and described oil duct cushion block is shaped as trapezoidal.
The beneficial effects of the utility model are: because being shaped as of oil duct cushion block is trapezoidal, when power transformer cake formula low-voltage coil adopts transposed conductor or tack winding transposition wire, can increase the transposition space of low-voltage coil inner radius, thereby need not stride the stay transposition.In addition, traditional square oil duct cushion block is because the internal diameter circle of power transformer winding and the girth of external diameter circle differ bigger, and the cushion block of internal diameter circle and external diameter circle compresses area, and to account for the percentage difference of this circle gross area big, and thrust is inhomogeneous.Being shaped as of transformer coil oil duct cushion block described in the utility model is trapezoidal, the internal coil diameter side is the minor face of trapezoidal cushion block, the coil outer diameter side is the long limit of trapezoidal cushion block, its bond length is less than traditional square cushion block width, it grows edge lengths greater than traditional square cushion block width, thereby is guaranteeing under the constant situation of heat dispersion, and it is aligned that radial upward each circle compresses area percent, thrust is even, and mechanical strength is more reliable.
The minor face end face that the utility model can further be set to described trapezoidal oil duct cushion block is provided with groove.
The utility model can further be set to the groove shapes that described trapezoidal oil duct cushion block minor face end face is provided with and be " T " font.
It is swallow-tail form that the utility model can further be set to the groove shapes that described trapezoidal oil duct cushion block minor face end face is provided with.
Description of drawings
Fig. 1 is the structure chart of first embodiment of the utility model
Fig. 2 is that first embodiment of the utility model is applied in the structural representation on the transformer coil
Fig. 3 is the structure chart of another embodiment of the utility model
Fig. 4 is that another embodiment of the utility model is applied in the structural representation on the transformer coil
Embodiment
Provided the trapezoidal oil duct cushion block of a kind of transformer coil as shown in Figure 1, 2, being shaped as of oil duct cushion block 1 is trapezoidal, and described trapezoidal oil duct cushion block 1 minor face end face 11 is provided with groove 111, groove 111 be shaped as " T " font.
Provided the trapezoidal oil duct cushion block of a kind of transformer coil shown in Fig. 3,4, being shaped as of oil duct cushion block 1 is trapezoidal, and described trapezoidal oil duct cushion block 1 minor face end face 11 is provided with groove 111, groove 111 be shaped as swallow-tail form.
Oil duct cushion block 1 can adopt punching of high density cardboard or milling to form, the groove 111 that trapezoidal oil duct cushion block 1 minor face end face 11 is provided with, as the draw-in groove that is fixed on the transformer coil stay 2, preferred " T " font of the shape of groove 111 or swallow-tail form, such groove 111 planform settings, oil duct cushion block 1 is stuck on the transformer coil stay 2, and is the most solid and reliable.
Because being shaped as of oil duct cushion block 1 is trapezoidal, when power transformer cake formula low-voltage coil adopts transposed conductor or tack winding transposition wire, can increases the transposition space of low-voltage coil inner radius, thereby need not stride the stay transposition.In addition, traditional square oil duct cushion block is because the internal diameter circle of power transformer winding and the girth of external diameter circle differ bigger, and the cushion block of internal diameter circle and external diameter circle compresses area, and to account for the percentage difference of this circle gross area big, and thrust is inhomogeneous.Being shaped as of transformer coil oil duct cushion block 1 described in the utility model is trapezoidal, the internal coil diameter side is the minor face of trapezoidal cushion block, the coil outer diameter side is the long limit of trapezoidal cushion block, its bond length is less than traditional square cushion block width, it grows edge lengths greater than traditional square cushion block width, thereby is guaranteeing under the constant situation of heat dispersion, and it is aligned that radial upward each circle compresses area percent, thrust is even, and mechanical strength is more reliable.
Claims (4)
1. trapezoidal oil duct cushion block of transformer coil, it is characterized in that: described oil duct cushion block is shaped as trapezoidal.
2. the trapezoidal oil duct cushion block of transformer coil according to claim 1 is characterized in that: the minor face end face of described trapezoidal oil duct cushion block is provided with groove.
3. the trapezoidal oil duct cushion block of transformer coil according to claim 1 and 2 is characterized in that: the groove shapes that trapezoidal oil duct cushion block minor face end face is provided with is " T " font.
4. the trapezoidal oil duct cushion block of transformer coil according to claim 1 and 2 is characterized in that: the groove shapes that trapezoidal oil duct cushion block minor face end face is provided with is a swallow-tail form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205009743U CN201741545U (en) | 2010-08-19 | 2010-08-19 | Transformer coil trapezoidal oil channel cushion block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205009743U CN201741545U (en) | 2010-08-19 | 2010-08-19 | Transformer coil trapezoidal oil channel cushion block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201741545U true CN201741545U (en) | 2011-02-09 |
Family
ID=43556823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205009743U Expired - Fee Related CN201741545U (en) | 2010-08-19 | 2010-08-19 | Transformer coil trapezoidal oil channel cushion block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201741545U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050243A (en) * | 2012-12-27 | 2013-04-17 | 吴江市变压器厂有限公司 | Transformer winding |
| CN113314314A (en) * | 2021-05-19 | 2021-08-27 | 辽宁华冶集团发展有限公司 | High-reliability frequency converter phase-shifting rectifier transformer |
-
2010
- 2010-08-19 CN CN2010205009743U patent/CN201741545U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050243A (en) * | 2012-12-27 | 2013-04-17 | 吴江市变压器厂有限公司 | Transformer winding |
| CN103050243B (en) * | 2012-12-27 | 2015-08-05 | 吴江变压器有限公司 | Transformer winding |
| CN113314314A (en) * | 2021-05-19 | 2021-08-27 | 辽宁华冶集团发展有限公司 | High-reliability frequency converter phase-shifting rectifier transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20140819 |
|
| EXPY | Termination of patent right or utility model |