CN1731545A - Three-phase dry-type transformer - Google Patents
Three-phase dry-type transformer Download PDFInfo
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- CN1731545A CN1731545A CN 200410041647 CN200410041647A CN1731545A CN 1731545 A CN1731545 A CN 1731545A CN 200410041647 CN200410041647 CN 200410041647 CN 200410041647 A CN200410041647 A CN 200410041647A CN 1731545 A CN1731545 A CN 1731545A
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- pressure winding
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Abstract
Disclosed is a three-phase dry-type transformer which comprises iron core, upper and lower clamp plates for clamping the iron core, draw plate and high, medium, low voltage winding that installed on the iron core. The high, medium and low voltage winding are arranged from outside to inside; on the outside of the medium winding is shielding layer and the medium winding is grounded via leads; on the upper and lower sides of the high, medium and low voltage winding equipped with upper and lower pads for separating and fixing purpose. Each phase is consisted of high, medium and low voltage windings, which can be connected, with three electric network of different voltage for power transmission with different capacities. The invention has the advantages of energy saving, flame resisting and great mechanical, electric properties.
Description
Technical field
The present invention relates to dry-type three-phase transformer.
Background technology
The patent of invention specification that China Patent No. is 96115624.4, name is called " dry transformer of fire-proof epoxy resin " discloses a kind of three-phase double winding dry-type transformer, comprise iron core, high and low pressure winding, pours, arm-tie, high pressure train wheel bridge, high pressure lower plate, suspension ring and pin, the electromagnetic wire of high pressure winding, low pressure winding is fixed among the pours, and high pressure train wheel bridge, high pressure lower plate are fixed on high and low pressure winding and arm-tie on the iron core in the lump.The termination of electromagnetic wire is outwards drawn by the binding post of high-low pressure winding side, and the low pressure winding is installed in the centre of high pressure winding, remains with certain clearance between the high and low pressure winding, is provided with the resin cushion block between the two ends up and down of high and low pressure winding and the iron core.China Patent No. is 02264795.3, to be called the utility model patent specification of " dry-type transformer " disclosed also be a kind of three-phase double winding dry-type transformer to name.
Above-mentioned dry-type transformer can only be exported a kind of voltage, but in some occasion, on heavy mechanical equipments such as tower crane, conveyer, except that the electric consumption on lighting that needs 400V, also need 660V, 520V power supply to be used for dynamic power machine owing to be double winding.Under existing conditions, must use two double winding dry-type transformers to satisfy the requirement that two kinds of different voltages are provided, both occupied ground had strengthened investment again.
Summary of the invention
The objective of the invention is to propose a kind of dry-type three-phase transformer that can export two kinds of different voltages simultaneously.
The present invention includes iron core, be used to clamp train wheel bridge, lower plate, the arm-tie of iron core and be sleeved on winding on the iron core.For achieving the above object, during taking to be provided with, the present invention presses winding between the high and low pressure winding, and the high, medium and low voltage winding is from being arranged in order outside to inside, and the outside of middle pressure winding is provided with screen, and screen is by lead-out wire ground connection.The above and below of high, medium and low voltage winding is respectively equipped with and is used to separate and the fixing upper and lower cushion block of high, medium and low voltage winding.
Press the screen of winding to form in the Copper Foil coiling that 0.15～0.65mm, width surpass the used Copper Foil 10～20mm of middle pressure winding in above-mentioned, the starting and the end mutually insulated of screen by thickness.
Press between winding and the low pressure winding in above-mentioned and be provided with insulating stay.
Be provided with cross-over block between above-mentioned low pressure winding and the iron core.
Above-mentioned high pressure winding is the resin filled type winding.
In above-mentioned, the low pressure winding is paper tinsel formula winding.
The present invention is a kind of three-phase three winding dry-type transformers, and is every by high, medium and low voltage winding composition, can be connected with the electrical network of three kinds of different voltages simultaneously, carries out the electric power transfer of different capabilities.Can realize that high pressure centering presses isolated operation, high pressure is to the low pressure isolated operation, and high pressure centering, three kinds of operational modes when low pressure is moved simultaneously.
The present invention is because middle pressure winding is provided with screen, can prevent that higher Harmonics in Electric Power Network and overvoltage are delivered to medium voltage side from the high-pressure side, effectively protect the output circuit of medium voltage side, thereby medium voltage side can directly link to each other with rectifying circuit, thereby, the present invention integrates rectification function (middle pressure) and illumination function (low pressure), in big machinery fields of employment such as electric locomotive, conveyer, harbour bridge cranes traditional duplex feeding is reduced to one tunnel power supply, reduces user's equipment investment; Also have energy-conservation, the difficult combustion of common dry-type transformer, good mechanical property, the good characteristics of electric property simultaneously.
Description of drawings
Fig. 1 is an outward appearance diagrammatic sketch of the present invention;
Fig. 2 is a winding diagrammatic sketch of the present invention;
Fig. 3 is the A-A diagrammatic sketch of Fig. 2.
Embodiment
Embodiment shown in Fig. 1 to Fig. 3 comprises iron core 1, high pressure winding 4, middle pressure winding 5 and low pressure winding 6.
Iron core 1 is to be cut into the silicon steel sheet stacks that two ends have 45 degree oblique angles by cold rolling grain oriented silicon steel sheet coiled strip through shear line in length and breadth to form, and this iron core 1 adopts 5 grades or 7 grades of stepping stacking method stacks to form, and the no-load loss and the noise of iron core are low.Iron core 1 clamps by train wheel bridge 2, lower plate 3, arm-tie (do not have among the figure and show) and core through screw rod 12, other screw rod 13.
High pressure winding 4, middle pressure winding 5 and low pressure winding 6 are from being arranged in order outside to inside.Three-winding be provided with must guarantee high pressure content be in, low pressure capacity sum, realizing the isolated operation of high pressure centering pressure, high pressure is to the low pressure isolated operation, and high pressure centering, when low pressure is moved simultaneously under three kinds of operational modes, in, the output capacity of low pressure remains unchanged.
High pressure winding 4 adopts high-quality oxygen-free copper lenticular wire coiling processing, carries out the vacuum pouring moulding with epoxy resin afterwards in the vacuum pouring equipment of special use.
In, low pressure winding 5,6 adopts paper tinsel formula windings: with thick metal forming such as Copper Foil or aluminium foil and the coiling on the coil winding machine of special use of preimpregnation cloth of 0.3-2mm, and form through oven drying.The characteristics of paper tinsel formula winding are that Electric Field Distribution is very even, can greatly improve the electric property of product.
In press winding technique intact after, adopt thickness to surpass the Copper Foil coiling of the used Copper Foil 10～20mm of middle pressure winding at its outer surface, as screen 5-1 at 0.15～0.65mm, width.Screen is started and end overlap joint, and there is insulating barrier in lap-joint, guarantee screen start and mutually insulated is answered at the end.Screen and middle pressure winding mutually insulated.The thickness of the used Copper Foil of screen, width do not have strict requirement, are chosen in the Copper Foil in the above-mentioned scope, consider more suitable getting final product from effect, cost two aspects, and generally selecting thickness is Copper Foil about 0.3mm.The lead-out wire ground connection of screen.
The setting of screen can prevent the damage of induction overvoltage to insulation, suppresses the harm of high-frequency harmonic.
The above and below of high, medium and low voltage winding 4,5,6 is respectively equipped with the upper and lower cushion block 7,8 that is used to separate the high, medium and low voltage winding.Upper and lower cushion block 7,8 each by resin cushion block 7-1,8-1 and silicon rubber cushion block 7-2,8-2 is bonding forms, wherein the thickness of silicon rubber cushion block 7-2,8-2 is between 10～20mm, respectively have two annular boss 7-2-1,8-2-1 on the end face of silicon rubber cushion block 7-2,8-2, each two annular boss 7-2-1,8-2-1 of silicon rubber cushion block 7-2,8-2 be embedded in respectively correspondence position height, middle pressure winding 4,5 and in, between the low pressure winding 5,6.The intensity that the resin cushion block has can be born bigger pressure, and the silicon rubber cushion block directly is connected with the high, medium and low voltage winding, by the shock-absorbing effect that the silicon rubber cushion block is play, has reduced the vibrations of transformer body;
In, be provided with the insulating stay 9 that rubber or resin are made between the low pressure winding 5,6, on the one hand in, can keep uniform clearance for insulation between the low pressure winding 5,6, play insulation and thermolysis; The mechanical performance that can add persistent erection, low pressure winding on the other hand prevents winding generation deformation under as situations such as sudden short circuits.
Be provided with the cylindrical cushion block 10 that rubber or resin are made between low pressure winding 6 and the iron core 1, cylindrical cushion block 10 effectively separates low pressure winding 6 and iron core 1, forms the insulation air gap, plays effect fixing, that insulate and dispel the heat.
Be welded with joint hinge 11. on the upper clamping piece 2 of transformer and be used to lift by crane transformer; The lower clamping piece 3 connection gasket pin 14 of transformer are used to install transformer.
Claims (6)
1, a kind of dry-type three-phase transformer, comprise iron core (1), be used to clamp the train wheel bridge (2) of iron core, lower plate (3), arm-tie and be installed in winding on the iron core, it is characterized in that: at height, low pressure winding (4,6) press winding (5) in being provided with between, high, in, low pressure winding (4,5,6) from being arranged in order outside to inside, the middle outside of winding (5) of pressing is provided with screen (5-1), screen (5-1) is by lead-out wire ground connection, height, in, low pressure winding (4,5,6) above and below is respectively equipped with and is used for separating and fixing height, in, low pressure winding (4,5,6) on, lower cushion block (7,8).
2, dry-type three-phase transformer according to claim 1, it is characterized in that: the screen of middle pressure winding (5) is formed in the Copper Foil coiling that 0.15～0.65mm, width surpass the used Copper Foil 10～20mm of middle pressure winding by thickness, the starting and the end mutually insulated of screen.
3, dry-type three-phase transformer according to claim 2 is characterized in that: be provided with insulating stay (9) between middle pressure winding (5) and the low pressure winding (6).
4, dry-type three-phase transformer according to claim 3 is characterized in that: be provided with cross-over block (10) between low pressure winding (6) and the iron core (1).
5, dry-type three-phase transformer according to claim 1 is characterized in that: high pressure winding (4) is the resin filled type winding.
6, dry-type three-phase transformer according to claim 1 is characterized in that: in, low pressure winding (5,6) is paper tinsel formula winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100416475A CN100411074C (en) | 2004-08-07 | 2004-08-07 | Three-phase dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100416475A CN100411074C (en) | 2004-08-07 | 2004-08-07 | Three-phase dry-type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1731545A true CN1731545A (en) | 2006-02-08 |
| CN100411074C CN100411074C (en) | 2008-08-13 |
Family
ID=35963882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100416475A Expired - Fee Related CN100411074C (en) | 2004-08-07 | 2004-08-07 | Three-phase dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100411074C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923943A (en) * | 2009-06-09 | 2010-12-22 | 常州东芝舒电变压器有限公司 | Transformer containing axial double-oil-passage spiral windings |
| CN106653327A (en) * | 2016-12-29 | 2017-05-10 | 江苏越达电力设备有限公司 | High-voltage dry-type hollow series reactor based on linearity control |
| CN108389688A (en) * | 2018-01-29 | 2018-08-10 | 兖州东方机电有限公司 | Mining multifunctional combinations of voltages formula mobile substation |
| CN111933423A (en) * | 2020-07-21 | 2020-11-13 | 山东电工电气集团智能电气有限公司 | Body structure of single-phase direct-buried dry-type transformer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2869313B1 (en) * | 2013-10-29 | 2017-05-31 | ABB Schweiz AG | Dry transformer coil and dry transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4725804A (en) * | 1984-05-24 | 1988-02-16 | Square D Company | Electrostatic fork shield |
| CN85200002U (en) * | 1985-04-01 | 1985-09-10 | 天津第二变压器厂 | A transfomer with trifilar winding used in latent oil pump and its control |
| CN2722405Y (en) * | 2004-08-07 | 2005-08-31 | 常州华迪特种变压器有限公司 | Three-phase dry transformer |
-
2004
- 2004-08-07 CN CNB2004100416475A patent/CN100411074C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923943A (en) * | 2009-06-09 | 2010-12-22 | 常州东芝舒电变压器有限公司 | Transformer containing axial double-oil-passage spiral windings |
| CN101923943B (en) * | 2009-06-09 | 2014-05-14 | 常州东芝舒电变压器有限公司 | Transformer containing axial double-oil-passage spiral windings |
| CN106653327A (en) * | 2016-12-29 | 2017-05-10 | 江苏越达电力设备有限公司 | High-voltage dry-type hollow series reactor based on linearity control |
| CN108389688A (en) * | 2018-01-29 | 2018-08-10 | 兖州东方机电有限公司 | Mining multifunctional combinations of voltages formula mobile substation |
| CN111933423A (en) * | 2020-07-21 | 2020-11-13 | 山东电工电气集团智能电气有限公司 | Body structure of single-phase direct-buried dry-type transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100411074C (en) | 2008-08-13 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 |
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| CF01 | Termination of patent right due to non-payment of annual fee |