CN203179662U - Dry type transformer - Google Patents
Dry type transformer Download PDFInfo
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- CN203179662U CN203179662U CN 201320010725 CN201320010725U CN203179662U CN 203179662 U CN203179662 U CN 203179662U CN 201320010725 CN201320010725 CN 201320010725 CN 201320010725 U CN201320010725 U CN 201320010725U CN 203179662 U CN203179662 U CN 203179662U
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- type transformer
- dry
- pressure winding
- windings
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Abstract
The utility model discloses a dry type transformer which comprises a case, iron cores and coil windings. The iron cores are arranged inside the case and comprise four iron core bodies which are arranged side by side, and the iron core bodies are made of amorphous alloy. Core pillars are formed by juxtaposition parts of adjacent iron core bodies, the coil windings are sleeved on the core pillars respectively, each coil winding comprises low-voltage windings and high-voltage windings, the low-voltage windings are sleeved on the core pillars respectively, the high-voltage windings wind around the low-voltage windings up and down in an adjacent mode respectively, the high-voltage windings which wind around the low-voltage windings are connected with one another in series, the high-voltage windings comprise a plurality layers of high-voltage coils which wind around the low-voltage windings, the number of windings of each layer of high-voltage coil decreases gradually from the core pillars in the outward direction, and epoxy resin is padded in clearances in the coil windings. The dry type transformer is compact in structure, convenient and fast to wind, high in lightning impulse capacity and operation impulse capacity and low in consumption, and the rate of partial discharge is close to zero.
Description
Technical field
The utility model relates to the transformer technology field, in particular to a kind of non-crystaline amorphous metal epoxy cast dry transformer.
Background technology
Transformer is generating, visual plant in power supply and the electricity consumption enterprise, it also is in very crucial status in electrical network, be to guarantee power grid security, the extremely important equipment of operation and people production reliably and household electricity, and the material of the structure of transformer and making directly has influence on quality and the safety of power supply.Though transformer is mature technology, the needs according to existing transformer still need transformer is constantly improved.
Common epoxy cast transformer coil uses exhausted dielectric kind many usually.Whole heat resistanceheat resistant expansion rate of change and the medium field uniformity of coil are relatively poor, are prone to be full of cracks after putting into operation, and this not only influences coil useful life, and also the office's of making discharge probability significantly increases, and influence is for the safety of, electricity consumption when serious.
In addition, existing epoxy casting transformer exists vertical capacitance less, the poor-performing that resisting longitudinal impact to disturb, and easily phenomenon is put in generation office, and efficient is lower, and packing space is little and cause dielectric strength poor, influences problems such as useful life.
The utility model content
The utility model is intended to solve at least one of technical problem that exists in the prior art.For this reason, the utility model need provide a kind of non-crystaline amorphous metal epoxy cast dry transformer, described transformer device structure compactness, and winding method is convenient, and the ability of lightning impulse resistant and switching impulse reaches the loss low consumption more by force, and office's discharge probability is similar to zero.
According to dry-type transformer of the present utility model, comprising: housing; Be arranged on the iron core in the described housing, described iron core comprises four juxtaposed iron-core workpieces, and described iron-core workpiece is formed by non-crystaline amorphous metal; Coil windings, described coil windings be set in respectively by adjacent described iron-core workpiece and put on the formed stem of part, each described coil windings comprises: the low pressure winding, described low pressure winding is set in respectively on the described stem; The high pressure winding, the neighbouring ground winding of described high pressure winding difference is on each described low pressure winding, and the described high pressure winding of winding on each the described low pressure winding connection that is one another in series, described high pressure winding comprises the multi-layer high-voltage coil that is wrapped on the described low pressure winding, and the number of turn of every layer of described high-tension coil is along reducing gradually from the outside direction of described stem; Gap in the wherein said coil windings is filled with epoxy resin.
According to dry-type transformer of the present utility model, compact conformation, winding method is convenient, and the ability of lightning impulse resistant and switching impulse is stronger, the loss low consumption, office's discharge probability is similar to zero.
In addition, according to dry-type transformer of the present utility model, can also have following additional technical feature:
According to an embodiment of the present utility model, described epoxy resin is filled in the described gap by cast.Like this, coil windings can be fixed into one, thereby increase the anti-short circuit capability of coil windings greatly.
According to an embodiment of the present utility model, the described multi-layer high-voltage coil that is wrapped on the described low pressure winding has the trapezoid cross section.
According to an embodiment of the present utility model, described trapezoid cross section is the right-angled trapezium cross section, and neighbouring described trapezoid cross section forms the isosceles trapezoid cross section.
Adopt this design, can increase several near-linears of thunderbolt ripple initial stage point position distribution of high-tension coil turn-to-turn, thereby improve the anti-surging ability of high pressure winding, also make the structure of dry-type transformer compacter simultaneously, make things convenient for the coiling of high pressure winding.
According to an embodiment of the present utility model, be provided with first insulating barrier between described every layer of adjacent described high-tension coil, described first insulating barrier is by there being solvent grid cloth material to be formed.Can improve the insulating properties of high-tension coil interlayer thus greatly.
According to an embodiment of the present utility model, be provided with second insulating barrier between described low pressure winding and the described high-tension coil, described second insulating barrier is formed by solvent-free grid cloth material.Like this, cooperate the trapezoid cross section structure of high-tension coil, can omit the insulation of high-tension coil end and similar insulating material, and then guarantee the consistency of integral medium, make electric field more even.
According to an embodiment of the present utility model, described iron-core workpiece comprises:
Upper yoke;
Lower yoke, described lower yoke and described upper yoke are oppositely arranged; And
A pair of return yoke, described return yoke link to each other with described lower yoke with described upper yoke respectively, to form loop configuration, wherein
Juxtaposed described return yoke forms described stem.
Thus, can the whole mechanical strength that improves iron core.
According to an embodiment of the present utility model, described low pressure winding adopts Copper Foil to be wrapped on the described stem, and adopts the insulating resin varnished insulation between the described Copper Foil.
According to an embodiment of the present utility model, described housing comprises:
Upper clamping piece, the described upper yoke of described upper clamping piece clamping;
Lower clamping piece, the described lower yoke of described lower clamping piece clamping; And
Body side frame, described upper clamping piece and described lower clamping piece are fixed to upper open end and the lower open end of described body side frame respectively, and hold described iron core and described coil windings.
According to an embodiment of the present utility model, be formed with peristome respectively on described body side frame, relative with the described coil windings side, described peristome is relative with each described stem respectively.Like this, can increase air and flow, to coil windings and stem cooling, make the thermal shock resistance of coil windings strong, thereby increased the life-span of dry-type transformer better.
According to an embodiment of the present utility model, fill in the described epoxy resin part in described gap and be formed with the heat radiation air flue that extends along the longitudinal direction of described housing.Thus, further increase the thermal shock resistance of dry-type transformer.
According to an embodiment of the present utility model, the outside of described coil windings is wound with glass fiber respectively.Thus, further improve the bulk strength of coil windings.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic diagram according to the dry-type transformer of an embodiment of the utility model;
Fig. 2 is the schematic diagram of iron core and winding coil;
Fig. 3 is the schematic diagram of high pressure winding.
Description of reference numerals:
Dry-type transformer 100;
First insulating barrier, 41, the second insulating barriers 42.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center "; " vertically "; " laterally "; " on "; D score; " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", close the orientation of indications such as " outward " or position is based on orientation shown in the drawings or position relation, only be the utility model and simplification description for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the present utility model, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
Below with reference to the dry-type transformer 100 of Fig. 1-Fig. 3 description according to the utility model embodiment.
Dry-type transformer 100 according to an embodiment of the utility model comprises housing 1, iron core 2 and coil windings 3.
As shown in Figure 1, iron core 2 is arranged in the housing 1.As depicted in figs. 1 and 2, iron core 2 comprises four juxtaposed iron-core workpieces 21, and iron-core workpiece 21 is formed by non-crystaline amorphous metal, that is to say that iron-core workpiece 21 is amorphous alloy core body 21.The iron-core workpiece 21 that adopts non-crystaline amorphous metal to make has good magnetic property, and easily by degaussing be magnetized, the core loss of more traditional silicon steel material reduces greatly, and energy-saving effect is good.
Each coil windings 3 includes low pressure winding 31 and high pressure winding 32, its mesolow winding 31 is set in respectively on the stem 22, the 32 difference neighbouring ground windings of high pressure winding are on each low pressure winding 31, and the high pressure winding 32 of winding on each low pressure winding 31 connection that is one another in series, high pressure winding 32 comprises the multi-layer high-voltage coil 322 that is wrapped on the low pressure winding 31, and the number of turn of every floor height line ball circle 322 reduces gradually along stem 22 outside directions.
In other words, all be arranged with low pressure winding 31 on each stem 22.All be arranged with two high pressure windings 32 in the outside of each low pressure winding 31, these two high pressure windings, 32 neighbouring and series connection settings, each high pressure winding 32 all has multi-layer high-voltage coil 322, and the number of turn from inside to outside the reducing gradually in the radial direction at corresponding stem 22 of every floor height line ball circle 322.
Wherein the gap in the coil windings 3 is filled with epoxy resin.Preferably, epoxy resin is filled in this gap by casting.Like this, coil windings 3 one be can be fixed into, thereby mechanical strength and the anti-short circuit capability of coil windings 3 increased greatly.
According to the dry-type transformer 100 of the utility model embodiment, compact conformation, winding method is convenient, and the ability of lightning impulse resistant and switching impulse is stronger, the loss low consumption, office's discharge probability is similar to zero.
In an embodiment of the present utility model, as shown in Figure 3, the multi-layer high-voltage coil 322 of winding on low pressure winding 31 has the trapezoid cross section, this trapezoid cross section can be the right-angled trapezium cross section, and neighbouring trapezoid cross section forms the isosceles trapezoid cross section, two neighbouring high pressure windings 32 that are each low pressure winding 31 outside all have the right-angled trapezium cross section, and the right angle side in these two right-angled trapezium cross sections is adjacent, so that this two right-angled trapezium section constitutions, one isosceles trapezoid cross section.
Adopt this design, can increase several near-linears of thunderbolt ripple initial stage point position distribution of high-tension coil 322 turn-to-turns, thereby improve the anti-surging ability of high pressure winding 32, also make the structure of dry-type transformer 100 compacter simultaneously, make things convenient for the coiling of high pressure winding 32.
Be provided with first insulating barrier 41 between adjacent every floor height line ball circle 322, this first insulating barrier 41 is by there being solvent grid cloth material to be formed, that is to say, between adjacent arbitrarily two-layer high-tension coil 322, be equipped with by first insulating barrier 41 that has solvent grid cloth material to make, can improve the insulating properties of high-tension coil 322 interlayers thus greatly.
As shown in Figure 3, be provided with second insulating barrier 42 between low pressure winding 31 and the high pressure winding 32, this second insulating barrier 42 is formed by solvent-free grid cloth material.Like this, cooperate the trapezoid cross section structure of high-tension coil 322, can omit high-tension coil 322 overhang insulations and similar insulating material, and then guarantee the consistency of integral medium, make electric field more even.
As depicted in figs. 1 and 2, iron-core workpiece 21 comprises upper yoke 211, lower yoke 212 and a pair of return yoke 213, wherein upper yoke 211 and lower yoke 212 are oppositely arranged, for example upper yoke 211 and lower yoke 212 are corresponding one by one on vertically, each return yoke 213 links to each other with lower yoke 212 with upper yoke 211 respectively, that is to say, the two ends of one of them return yoke 213 link to each other with an end of upper yoke 211 and lower yoke 212 respectively, the two ends of a remaining return yoke 213 link to each other with the other end of upper yoke 211 with lower yoke 212 respectively, thereby formation loop configuration, wherein juxtaposed return yoke 213 forms above-mentioned stem 22, and namely any adjacent two return yokes 213 constitute a stem 22.Thus, can the whole mechanical strength that improves iron core 2.
As shown in Figure 1, housing 1 comprises upper clamping piece 11, lower clamping piece 12 and body side frame 13, wherein upper clamping piece 11 is used for clamping upper yoke 211, upper yoke 211 can by a plurality of bolted below upper clamping piece 11 to increase constant intensity, lower clamping piece 12 is used for clamping lower yoke 212, lower yoke 212 can be by a plurality of the top to increase constant intensity of lower clamping piece 12 that are bolted to, body side frame 13 hollows and unlimited to form upper shed and under shed up and down, upper clamping piece 11 and lower clamping piece 12 are fixed to upper open end and the lower open end of body side frame 13 respectively, and hold iron core 2 and coil windings 3.
As shown in Figure 1, be formed with peristome 131 respectively on body side frame 13, relative with coil windings 3 side, this peristome 131 is relative with each stem 22 respectively, for example in the example of Fig. 1, be formed with three peristomes 131 on one side of body side frame 13, each peristome 131 extends along vertical, is formed with other three peristomes 131 at the opposite side of body side frame 13, and each peristome 131 also extends and corresponding one by one respectively with three peristomes 131 of a relative side along vertical.Like this, can increase air and flow, to coil windings 3 and stem 22 coolings, make the thermal shock resistance of coil windings 3 strong, thereby increased the life-span of dry-type transformer 100 better, can also increase creepage distance simultaneously.
In order further to increase the thermal shock resistance of dry-type transformer 100, be filled in the epoxy resin part in described gap and be formed with the heat radiation air flue that extends along the longitudinal direction of housing 1.
In preferred embodiments more of the present utility model, low pressure winding 31 adopts Copper Foil to be wrapped on the stem 22, and adopts the insulating resin varnished insulation between the Copper Foil.Like this, can improve mechanical strength and the anti-short circuit capability of low pressure winding 31.In order further to improve the bulk strength of coil windings 3, the outside of coil windings 3 is wound with glass fiber respectively.
Generally speaking, the dry-type transformer 100 according to a preferred embodiment of the utility model can have following advantage: 1) coil windings 3 mechanical strength height, and anti-short circuit capability is strong; 2) coil windings 3 thermal shock resistances are strong, and life of product improves greatly; 3) coil windings 3 protection against the tide, dustproof, anti-salt fog ability are strong; 4) high-tension coil 322 of high pressure winding 32 adopt multistages and layer around design, can improve the anti-surging ability of high pressure winding 32, and Electric Field Distribution is more even; Iron core 2 mechanical strength height are subjected to vibration influence little during transportation; 5) have the ability of anti-high order harmonic component, can adopt Dynll, the Yyn0 mode of connection.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment under the situation that does not break away from principle of the present utility model and aim, scope of the present utility model is limited by claim and equivalent thereof.
Claims (12)
1. a dry-type transformer is characterized in that, comprising:
Housing;
Be arranged on the iron core in the described housing, described iron core comprises four juxtaposed iron-core workpieces, and described iron-core workpiece is formed by non-crystaline amorphous metal;
Coil windings, described coil windings be set in respectively by adjacent described iron-core workpiece and put on the formed stem of part, each described coil windings comprises:
The low pressure winding, described low pressure winding is set in respectively on the described stem;
The high pressure winding, the neighbouring ground winding of described high pressure winding difference is on each described low pressure winding, and the described high pressure winding of winding on each the described low pressure winding connection that is one another in series, described high pressure winding comprises the multi-layer high-voltage coil that is wrapped on the described low pressure winding, and the number of turn of every layer of described high-tension coil is along reducing gradually from the outside direction of described stem; Wherein
Gap in the described coil windings is filled with epoxy resin.
2. dry-type transformer according to claim 1 is characterized in that, described epoxy resin is filled in the described gap by cast.
3. dry-type transformer according to claim 2 is characterized in that, the described multi-layer high-voltage coil that is wrapped on the described low pressure winding has the trapezoid cross section.
4. dry-type transformer according to claim 3 is characterized in that, described trapezoid cross section is the right-angled trapezium cross section, and neighbouring described trapezoid cross section forms the isosceles trapezoid cross section.
5. dry-type transformer according to claim 4 is characterized in that, is provided with first insulating barrier between described every layer of adjacent described high-tension coil, and described first insulating barrier is by there being solvent grid cloth material to be formed.
6. dry-type transformer according to claim 5 is characterized in that, is provided with second insulating barrier between described low pressure winding and the described high-tension coil, and described second insulating barrier is formed by solvent-free grid cloth material.
7. dry-type transformer according to claim 1 is characterized in that, described iron-core workpiece comprises:
Upper yoke;
Lower yoke, described lower yoke and described upper yoke are oppositely arranged; And
A pair of return yoke, described return yoke link to each other with described lower yoke with described upper yoke respectively, to form loop configuration, wherein
Juxtaposed described return yoke forms described stem.
8. dry-type transformer according to claim 1 is characterized in that, described low pressure winding adopts Copper Foil to be wrapped on the described stem, and adopts the insulating resin varnished insulation between the described Copper Foil.
9. dry-type transformer according to claim 7 is characterized in that, described housing comprises:
Upper clamping piece, the described upper yoke of described upper clamping piece clamping;
Lower clamping piece, the described lower yoke of described lower clamping piece clamping; And
Body side frame, described upper clamping piece and described lower clamping piece are fixed to upper open end and the lower open end of described body side frame respectively, and hold described iron core and described coil windings.
10. dry-type transformer according to claim 9 is characterized in that, is formed with peristome respectively on described body side frame, relative with the described coil windings side, and described peristome is relative with each described stem respectively.
11. dry-type transformer according to claim 1 is characterized in that, fills in the described epoxy resin part in described gap to be formed with the heat radiation air flue that extends along the longitudinal direction of described housing.
12. dry-type transformer according to claim 1 is characterized in that, the outside of described coil windings is wound with glass fiber respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010725 CN203179662U (en) | 2013-01-08 | 2013-01-08 | Dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010725 CN203179662U (en) | 2013-01-08 | 2013-01-08 | Dry type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203179662U true CN203179662U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320010725 Withdrawn - After Issue CN203179662U (en) | 2013-01-08 | 2013-01-08 | Dry type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203179662U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050234A (en) * | 2013-01-08 | 2013-04-17 | 沈阳昊诚电气股份有限公司 | Dry transformer |
| CN105206394A (en) * | 2015-08-25 | 2015-12-30 | 莱芜钢铁集团有限公司 | Repairing method for surface checking of dry type transformer winding |
| CN105810418A (en) * | 2016-05-05 | 2016-07-27 | 上海兆启新能源科技有限公司 | High-voltage high-frequency transformer with single-phase high-power special insulation structure |
-
2013
- 2013-01-08 CN CN 201320010725 patent/CN203179662U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050234A (en) * | 2013-01-08 | 2013-04-17 | 沈阳昊诚电气股份有限公司 | Dry transformer |
| CN103050234B (en) * | 2013-01-08 | 2016-09-21 | 沈阳昊诚电气有限公司 | Dry-type transformer |
| CN105206394A (en) * | 2015-08-25 | 2015-12-30 | 莱芜钢铁集团有限公司 | Repairing method for surface checking of dry type transformer winding |
| CN105810418A (en) * | 2016-05-05 | 2016-07-27 | 上海兆启新能源科技有限公司 | High-voltage high-frequency transformer with single-phase high-power special insulation structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee after: Shenyang Haocheng Electrical Equipment Co., Ltd. Address before: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee before: Shenyang Haocheng Electric Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20160921 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |