CN203415385U - Pressing block device of oil-immersed transformer winding - Google Patents
Pressing block device of oil-immersed transformer winding Download PDFInfo
- Publication number
- CN203415385U CN203415385U CN201320555430.0U CN201320555430U CN203415385U CN 203415385 U CN203415385 U CN 203415385U CN 201320555430 U CN201320555430 U CN 201320555430U CN 203415385 U CN203415385 U CN 203415385U
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- coil
- oil
- pressing block
- winding
- birch
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Abstract
The utility model discloses a pressing block device of an oil-immersed transformer winding. The pressing block device is characterized in that the pressing block is a cuboid, is made of a dehumidified birch material and is pressed at the upper end of a coil winding; a plurality of inwards sunken winding oil ducts are formed in one surface pressed on a coil along the amplitude direction of the coil; inwards sunken high- and low-pressure main insulating oil ducts are formed in one surface perpendicular to the coil along the axial direction of the coil; the tops of the oil ducts and the high- and low-pressure main insulating oil ducts of the winding are circular; end part chamfers are arranged on the lower parts of two end faces, which are perpendicular to the coil, of the pressing block device. The stress tolerance of birch is greatly higher than that of laminated wood and the volume of a birch pressing block is much smaller than that of the laminated wood, so that circulating cooling of transformer cooling oil is facilitated, and the volume of a transformer is decreased; meanwhile, the price of the birch pressing block is low, and the birch pressing block is easy to manufacture, so that the manufacturing cost of the transformer is reduced.
Description
Technical field
The utility model relates to the briquetting device of oil-filled transformer winding, belongs to the technical field of transformer device structure.
Background technology
Oil-immersed power transformer is that the structural design of traditional electric equipment ，Ge manufacturing firm is also similar.The briquetting of the distribution transformer winding that electric pressure is lower adopts lamination wood more, is evenly distributed on winding upper end, and version is as Fig. 1. as shown in.This lamination wood briquetting is made and is needed through technical processs such as secondary immersion, rotary-cut, gluing and hot pressing.Although its dielectric constant is less than laminated paper board, more approaching with transformer oil, but its mechanical strength and stressed bending resistance are than good many of laminated paper board, so the lamination wood suitable for making insulation fabric part not too high to electric strength, wherein applying maximum is exactly the upper end briquetting as coil windings.By Test Summary, meet the requirement of mechanical strength of transformer sudden short circuit test, lamination wood must meet certain dimensional requirement, otherwise winding electric power cannot bear short circuit test time.When guaranteeing that it is electric, mechanical performance meets the demands, the upper surface of Transformer Winding has 1/3 tegillum pressed wood to push down, the cool cycles access denial of transformer oil is more serious, causes that the hot localised points temperature rise of winding is higher, adopts the scheme of low-temperature-rise just so uneconomical during design.As increased heat radiation oil duct groove on lamination wood, briquetting size also needs to strengthen, and so also often can lose more than gain.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of briquetting device simple, cheap, a kind of oil-filled transformer winding that anti-pressure ability strong, transformer circulating cooling is effective of manufacturing.
For achieving the above object, the utility model is realized by following technological means:
A kind of briquetting device of oil-filled transformer winding, it is characterized in that: described briquetting device is the cuboid of the birch material through dehumidification treatments, be pressed on the upper end of coil windings, in the one side that is pressed on coil, along coil width to direction, be provided with some winding oil ducts that cave inward, in the one side vertical with coil, be provided with the high and low pressure main insulation oil duct caving inward along coil axial direction.
Preferred:
Described winding oil duct, high and low pressure main insulation oil duct top are circular;
Both ends of the surface bottom at the briquetting device perpendicular to coil is provided with end-beveling.
The beneficial effects of the utility model are: because the anti-pressure ability of birch is greater than lamination wood, the volume of birch briquetting is far smaller than lamination wood, is beneficial to the circulating cooling of transformer oil, has reduced the volume of transformer; Meanwhile, birch briquetting cheap, manufactures simply, has reduced the manufacturing cost of transformer.
Accompanying drawing explanation
Fig. 1 is the utility model front view, and Fig. 2 is vertical view, and Fig. 3 is briquetting device assembling schematic diagram, and Fig. 4 is Fig. 3 vertical view.
The implication of drawing reference numeral is as follows:
1 birch briquetting, 2 high and low pressure main insulation oil ducts, 3 winding oil ducts, 4 oblique angles, end, 5 iron cores, 6 core clampings, 7 high and low pressure windings.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in drawings, a kind of briquetting device of oil-filled transformer winding, described briquetting device is the cuboid of the birch material through dehumidification treatments, be pressed on the upper end of high-voltage coil and low-voltage coil winding 7, in the one side that is pressed on coil, along coil width to direction, be provided with some winding oil ducts 3 that cave inward, in the one side vertical with coil, be provided with the high and low pressure main insulation oil duct 2 caving inward along coil axial direction.
Because it has stronger moisture absorption, after soaking, transformer oil has and the approaching dielectric constant of lamination wood, can meet electric property requirement.Because its resistance to mechanical strength is large, also can be good at doing oil-filled transformer insulating part, through mechanical test, every mm
2deformation quantity under effect 100N is only 1.3% left and right, and with the deformation quantity of equal pressure laminated wood in 2.1% left and right, so under equal requirement of mechanical strength, not only can suitably reduce the size of birch briquetting, also can increase oil duct path groove simultaneously to strengthen heat radiation on briquette structure.
According to the width of winding to the corresponding winding oil duct 3 of oil duct Position Design; High and low pressure main insulation oil duct 2, when the deep fat groove of circulation time by briquetting that make progress upwards flows, reduces oil duct resistance.
Aspect economy, because the manufacturing procedure of lamination wood is complicated, price reaches 2.5 ten thousand yuan/ton, and the material of birch, processing be only about half of lamination wood.So birch type briquetting of the present utility model has very large using value in oil-filled transformer.
Preferred:
Described winding oil duct, high and low pressure main insulation oil duct top are circular, reduce transformer oil circulating resistance;
Both ends of the surface bottom at the briquetting device perpendicular to coil is provided with oblique angle, end 4, when deep fat upwards flows, by oblique angle shape, cushions, and reduces oily circulation resistance.
More than show and described basic principle of the present utility model, principal character and advantage.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. the briquetting device of an oil-filled transformer winding, it is characterized in that: described briquetting device is the cuboid of the birch material through dehumidification treatments, be pressed on the upper end of coil windings, in the one side that is pressed on coil, along coil width to direction, be provided with some winding oil ducts that cave inward, in the one side vertical with coil, be provided with the high and low pressure main insulation oil duct caving inward along coil axial direction.
2. the briquetting device of a kind of oil-filled transformer winding as claimed in claim 1, is characterized in that: described winding oil duct, high and low pressure main insulation oil duct top are for circular.
3. the briquetting device of a kind of oil-filled transformer winding as claimed in claim 1, is characterized in that: the both ends of the surface bottom at the briquetting device perpendicular to coil is provided with end-beveling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320555430.0U CN203415385U (en) | 2013-09-09 | 2013-09-09 | Pressing block device of oil-immersed transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320555430.0U CN203415385U (en) | 2013-09-09 | 2013-09-09 | Pressing block device of oil-immersed transformer winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415385U true CN203415385U (en) | 2014-01-29 |
Family
ID=49978259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320555430.0U Expired - Lifetime CN203415385U (en) | 2013-09-09 | 2013-09-09 | Pressing block device of oil-immersed transformer winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597812A (en) * | 2018-06-20 | 2018-09-28 | 湖北网安科技有限公司 | A kind of oil-immersed transformer coil assembly preventing deformation |
-
2013
- 2013-09-09 CN CN201320555430.0U patent/CN203415385U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597812A (en) * | 2018-06-20 | 2018-09-28 | 湖北网安科技有限公司 | A kind of oil-immersed transformer coil assembly preventing deformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |
|
| CX01 | Expiry of patent term |