CN2722405Y - Three-phase dry transformer - Google Patents
Three-phase dry transformer Download PDFInfo
- Publication number
- CN2722405Y CN2722405Y CN 200420078498 CN200420078498U CN2722405Y CN 2722405 Y CN2722405 Y CN 2722405Y CN 200420078498 CN200420078498 CN 200420078498 CN 200420078498 U CN200420078498 U CN 200420078498U CN 2722405 Y CN2722405 Y CN 2722405Y
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- winding
- pressure winding
- low pressure
- voltage winding
- iron core
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Abstract
The utility model provides a three-phase dry transformer, which comprises an iron core, an upper clamping plate, a lower clamping plate, a pull plate, a high voltage winding, an intermediate voltage winding and a low voltage winding. Wherein, the upper and lower clamping plates and the pull plate are used for clamping the iron core, and the three windings are installed on the iron core. The high voltage winding and the low voltage winding are successively arranged from the outside to the inside, and the external of the intermediate voltage winding is provided with a shielding layer; the shielding layer is grounded by a leader line, and the upper part and the lower part of the three windings are respectively provided with an upper and a lower cushion block which are used for separating and fixing the three windings. The three-phase dry transformer is characterized in that each phases are all formed by the high voltage winding, the intermediate voltage winding and the low voltage winding, and the three-phase dry transformer can carry out the power transmission of different capacity by connecting with three different electric networks of three different kind of voltage at the same time. The three-phase dry transformer has the advantage that the equipment investment is reduced; the three-phase dry transformer also has the advantages of a common dry type transformer of energy-saving, fire-retardant and good electrical properties.
Description
Technical field
The utility model 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.
The utility model content
The purpose of this utility model is to propose a kind of dry-type three-phase transformer that can export two kinds of different voltages simultaneously.
The utility model comprises iron core, be used to clamp the train wheel bridge of iron core, lower plate, arm-tie and be sleeved on winding on the iron core.For achieving the above object, during taking to be provided with, the utility model 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 utility model 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 utility model 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 utility model 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 utility model;
Fig. 2 is a winding diagrammatic sketch of the present utility model;
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, 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 |
|---|---|---|---|
| CN 200420078498 CN2722405Y (en) | 2004-08-07 | 2004-08-07 | Three-phase dry transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420078498 CN2722405Y (en) | 2004-08-07 | 2004-08-07 | Three-phase dry transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2722405Y true CN2722405Y (en) | 2005-08-31 |
Family
ID=35012775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420078498 Expired - Lifetime CN2722405Y (en) | 2004-08-07 | 2004-08-07 | Three-phase dry transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2722405Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411074C (en) * | 2004-08-07 | 2008-08-13 | 常州华迪特种变压器有限公司 | Three-phase dry-type transformer |
-
2004
- 2004-08-07 CN CN 200420078498 patent/CN2722405Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411074C (en) * | 2004-08-07 | 2008-08-13 | 常州华迪特种变压器有限公司 | Three-phase dry-type transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080813 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |