CN108597744B - A kind of compact exceeds loading capability low-temperature-rise power transformer - Google Patents
A kind of compact exceeds loading capability low-temperature-rise power transformer Download PDFInfo
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- CN108597744B CN108597744B CN201810527474.XA CN201810527474A CN108597744B CN 108597744 B CN108597744 B CN 108597744B CN 201810527474 A CN201810527474 A CN 201810527474A CN 108597744 B CN108597744 B CN 108597744B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/325—Coil bobbins
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Transformer Cooling (AREA)
Abstract
The present invention provides a kind of compact and exceeds loading capability low-temperature-rise power transformer, is provided with corrugated plate on shell wall, further includes dismountable special-shaped gilled radiator with unsymmetric structure；The case of the shell with bottom is fixedly connected along the bottom for being located at shell and by bolt, there are four longitudinal raised oil traps for four sides setting of the case lid, outside connection dismountable special-shaped gilled radiator of oil trap and the corrugated plate, wherein the top of the Special-shaped sheet formula radiator and the corrugated plate is higher than the case lid of the shell.Compact of the invention exceeds loading capability low-temperature-rise power transformer, and compact-sized, occupied area is small, the mechanical strength of corrugated plate is higher, and corrugated plate weld seam is not easily susceptible to cracking oil leak when long-distance transport, and special-shaped gilled radiator is detachable, it is readily transported, transformer overload ability is strong；Loss, the noise that transformer can be reduced simultaneously, extend the service life of transformer, can reach the effect of environmental protection and energy saving.
Description
Technical field
The present invention relates to Full-enclosed oil-immersed transformer, it is specifically related to a kind of compact and exceeds loading capability low-temperature-rise electric power
Transformer.
Background technique
Full-enclosed oil-immersed transformer shell mainly uses corrugated plate to radiate at present, and corrugated plate, which removes, has heat dissipation function
Can be outer, also have the function of to generate dilation with the variation of transformer oil volume.Corrugated plate with temperature variation, load
Size, the height of temperature of oil in transformer in shell and automatic expansion is shunk, dilation ability is greater than 10,000 times, guarantees transformer oil
It is completely isolated with air, maintenance is not had within the transformer life phase.
Corrugated plate is generally welded on shell wall, and Full-enclosed oil-immersed transformer shell mainly considers following three in design
A factor: heat dissipation, the bulging amount of transformer oil and the mechanical strength of shell of transformer.Firstly, transformer is at runtime, meeting
Fever, the design of shell will meet the requirement of transformer heat dissipation.Secondly, transformer is at runtime, the temperature of transformer oil can be risen
Height, when the load of transformer generates variation or variation of ambient temperature, the volume of transformer oil can generate variation, therefore set
The swell increment that corrugated plate must be taken into consideration in meter is greater than the bulging amount of transformer oil.Third, having for transformer case are enough
The mechanical strength of mechanical strength, especially corrugated plate, to guarantee that transformer is oil-proof in transport and operation.
In the prior art, generally as transformer capacity≤630kVA, the radiating surface of shell can satisfy the requirement of standard
When, but the swell increment of corrugated plate is inadequate, and as transformer capacity > 630kVA, the swell increment of corrugated plate can satisfy standard
Requirement, but the radiating surface of shell is inadequate.Therefore, lack in the prior art and be not only able to satisfy cooling requirements but also be able to satisfy swell increment
The shelling machine of demand.
In addition, the price of copper material is far longer than the price of silicon steel sheet, the price of copper according to current copper valence and silicon steel sheet price
About 5 times or more of silicon steel sheet price, therefore design of transformer generally considers multi-purpose silicon steel sheet, is reduced become with the principle of copper wire less
The cost of depressor, will cause transformer case in this way, length, width increase in shape, and height is reduced, the land occupation face of transformer
Product increases.
Since the height of transformer case reduces, the piece of corrugated plate is wide to be reduced therewith, and the wave height of domestic corrugated plate at present
Maximum can only produce 350mm, therefore as transformer capacity > 630kVA, be welded on shell wall using corrugated plate four sides
Design requirement is not achieved in structure, heat dissipation area.Four finned oil collection boxes are designed generally on four angles of shell at present, by finned
Oil collection box can increase corrugated plate the piece number, and corrugated plate is welded on the wall of shell wall and finned oil collection box simultaneously, due to oil collection box
Mechanical strength it is relatively poor, and corrugated plate the piece number increases more, and the mechanical strength of corrugated plate itself reduces.Therefore, in transformation
Device long-distance transport, when especially road conditions are very poor, weld and corrugated plate itself weld of transformer case and corrugated plate are easy
Cracking oil leak, brings a great deal of trouble to the after-sale service of transformer.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of compact and exceeds loading capability low-temperature-rise power transformer, has
Body technique scheme is as follows:
A kind of compact exceeds loading capability low-temperature-rise power transformer comprising iron core, coil, transformer oil and outer
Shell, the shell include case lid, shell wall and bottom, are provided with corrugated plate on shell wall, it is characterised in that: the transformer is also
Including dismountable special-shaped gilled radiator with unsymmetric structure, the abnormity gilled radiator is arranged in corrugated plate two
Side；There are four longitudinal raised oil trap, the outside connection of oil trap is described dismountable different for four sides setting of the case lid
Shape gilled radiator and the corrugated plate；Case lid is wholely set with shell wall, and shell wall bottom is provided with case edge, and the case is along logical
It crosses bolt to be fixedly connected with bottom, wherein the top of the Special-shaped sheet formula radiator and the corrugated plate is higher than the case of the shell
Lid.
Further, the lower part of the shell uses reversed convex type structure.
Further, the swell increment of the corrugated plate is slightly larger than the swell increment of transformer oil.
Further, the composition concave shape of abnormity gilled radiator described in two adjacent groups around the corrugated plate to be arranged.
Further, it is provided with coil inner fiber container between iron core column and coil, is set between coil inner fiber container and internal coil diameter
It is equipped with interior oil baffle, outer oil baffle, and interior oil baffle and outer oil baffle are provided between coil outer diameter and coil outer fiber container
It is spaced apart to be arranged alternately, for guiding the oil stream direction of coil oil clearance.
Further, the oil stream direction of the interior oil baffle and the outer oil baffle guidance coil oil clearance is at generally'S '-shaped stream
It is dynamic.
Further, the conducting wire on the inside of oil clearance and the conducting wire on the outside of oil clearance use different winding methods, on the inside of oil clearance
Conducting wire carries out coiling using vertical by the way of, and the conducting wire on the outside of oil clearance carries out coiling using flat by the way of.
Further, the section of the iron core column of the iron core is approximate oblate or approximate circle or approximate ellipsoidal knot
Structure, and the sectional area of iron core yoke piece is greater than the sectional area of iron core column piece, the cross sectional shape of the iron core yoke of the iron core is approximate D-shaped
Structure.
Further, the iron core is made of multistage silicon steel sheet, the piece of the first order (the wide maximum level of piece) silicon sheet core column
The piece that width is equal to iron core yoke is wide, and the piece that the piece width of the iron core yoke of remaining silicon steel sheet at different levels is all larger than iron core column is wide.
The beneficial effects of the present invention are: compact of the invention exceeds loading capability low-temperature-rise power transformer, and structure is tight
It gathers, the mechanical strength of corrugated plate is higher, and corrugated plate weld seam is not easily susceptible to cracking oil leak, and special-shaped gilled radiator when long-distance transport
Detachably, it is readily transported.In addition, compact of the invention exceeds loading capability low-temperature-rise electrical transformer tank structure heat dissipation effect
Good, transformer overload ability is strong, and occupied area is small, compact-sized, can reduce the occupied area of power distribution room, saves capital cost
With maintenance convenient for safeguarding is bigger especially suitable for seaonal load variation, requires by force, or to transformer overload capacity
The lesser occasion of floor area requirement.And compact of the invention exceeds the significant decrease of loading capability low-temperature-rise power transformer
Transformer noise effectively accelerates oil stream speed, significantly enhances the overload capacity of transformer, and extend transformer uses the longevity
Life.Transformer has the characteristics that at low cost, loss is low, noise is low simultaneously.
Detailed description of the invention
Fig. 1 is existing Full-enclosed oil-immersed transformer main view；
Fig. 2 is existing Full-enclosed oil-immersed transformer top view；
Fig. 3 is A-A partial sectional view in Fig. 1；
Fig. 4 is Full-enclosed oil-immersed transformer main view of the invention；
Fig. 5 is Full-enclosed oil-immersed transformer top view of the invention；
Fig. 6 is Full-enclosed oil-immersed transformer left view of the invention；
Fig. 7 is A-A partial sectional view in Fig. 5；
Fig. 8 A is the main view of detachable special-shaped gilled radiator；
Fig. 8 B is the left view of detachable special-shaped gilled radiator；
Fig. 8 C is the top view of detachable special-shaped gilled radiator；
Fig. 9 is existing coil oil flow structure schematic diagram；
Figure 10 is coil oil flow structure schematic diagram of the present invention；
Figure 11 is existing coil oil clearance inboard wire arrangement figure；
Figure 12 coil oil clearance inboard wire arrangement figure of the present invention；
Figure 13 A is existing core structure schematic diagram；
Figure 13 B is A-A iron core column sectional view in Figure 13 A；
Figure 13 C is B-B (C-C rotation) iron core yoke sectional view in Figure 13 A；
Figure 14 A is core structure schematic diagram of the invention；
Figure 14 B is A-A iron core column sectional view in Figure 14 A；
Figure 14 C is B-B (C-C rotation) iron core yoke sectional view in Figure 14 A.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention:
Embodiment one
Full-enclosed oil-immersed transformer mainly includes four parts: iron core, copper wire made of silicon steel sheet or the line of copper foil coiling
Circle, transformer oil, the shell for being provided with corrugated plate.According to current copper valence and silicon steel sheet price, the price of copper material is far longer than silicon
The price of steel disc, the price of copper are about 5 times of silicon steel sheet price or more, therefore design of transformer generally considers multi-purpose silicon steel sheet,
The cost for reducing transformer with the principle of copper wire less, will cause transformer case in this way, length, width increase in shape, height
H1 is reduced, and the occupied area of transformer increases.
As shown in Figure 1-3, the shell of transformer is provided with case lid 1, shell wall 6 and bottom 4, shell wall 6 and bottom 4 one
Body, 6 upper end of shell wall are provided with case along 3, and case lid 1 and case are bolted to connection along 3, and the case lid 1 and case of transformer are along 3 limits
The width H3 of corrugated plate 2 is made, i.e. corrugated plate can be only positioned at case lid 1 and case below 3, and the width H3 of corrugated plate 2 is caused to subtract
Few, when transformer capacity is larger, although the swell increment of corrugated plate 2 can satisfy needs, the heat dissipation area of corrugated plate 2 is remote
It is not by far up to the mark.It needs that the finned oil collection box 5 of four landscape layouts is arranged at four angles of tank wall at this time, in finned oil collection box
Increase the piece number of corrugated plate on 5 to meet cooling requirements.
Full-enclosed oil-immersed transformer in the prior art, corrugated plate 2 are arranged on shell wall 6, in addition, obtaining in order to more preferable
Heat dissipation, using finned corrugated plate shell, bad mechanical strength, the corrugated plate 2 being especially welded on finned 5 wall of oil collection box is long-distance
Oil leak is easy when transport.And due to being provided with corrugated plate 2 on finned 5 wall of oil collection box, the length and width of shell increases, leads
Cause area larger, increase the occupied area of transformer, capital cost is high, especially some pairs of transformer outer dimensions require compared with
Small occasion, the area of transformer are more than that requirement is not achieved in design occupied area.
And the shell of this structure is in design, when the heat dissipation area of corrugated plate reaches requirement, but the expansion of corrugated plate
Amount is far longer than the swell increment of oil, and excessively rich from the point of view of corrugated plate swell increment, result causes the weight of corrugated plate
It greatly increases, the weight of entire transformer case also increases, and increases transformer case cost.
Further, since transformer case top oil temperature highest, therefore the heat dissipation center of shell is higher, heat dissipation effect is better,
The transformer case of this structure, since corrugated plate 2 is located at case along 3 in the following, the heat dissipation center of corrugated plate 2 is lower, heat dissipation
Effect is poor, and transformer top-oil temperature is higher.
In order to solve above-mentioned technical problem, compact of the invention exceeds loading capability low-temperature-rise power transformer, such as Fig. 4-7
It is shown, other than being provided with corrugated plate 2, it is additionally provided with detachable special-shaped gilled radiator 21, specific structure such as Fig. 8 A-8C
Shown, heat dissipation is mainly completed by gilled radiator 21 and corrugated plate 2, and the dilation of transformer oil is completed by corrugated plate 2, because
This improved shell mechanism, in design, the swell increment of corrugated plate 2 is approximately more than the swell increment of transformer oil, therefore wave
The piece number and wave height size H4 of line piece 2 can be greatly reduced, and corrugated plate 2 is to be welded on shell wall 6 completely, therefore corrugated plate
Mechanical strength it is higher, and gilled radiator 21 removes independent packing and transporting when transporting, and installs piece again after transformer is in place
Formula radiator 21 fills it up with transformer oil, the shell of this structure, and corrugated plate weld seam is not easily susceptible to cracking oil leak when long-distance transport.
When transformer station high-voltage side bus, the top oil temperature highest of shell becomes if the heat dissipation center of corrugated plate and radiator is improved
The heat dissipation effect of depressor is more preferable, therefore using the corrugated plate and detachable special-shaped chip that height H3 increases as shown in figures 5-8
Radiator, its characteristics are as follows:
The shell of transformer of the invention is provided with case lid 1, shell wall 6 and bottom 4, and case lid 1 is integrally set with shell wall 6
It sets, 6 bottom of shell wall is provided with case along 3, and case is bolted to connection along 3 and bottom 4, such as Fig. 4, shown in Fig. 7, in case lid 1
Four sides increase by four longitudinal oil traps 7 for increasing layout as shown in Figure 7, oil trap 7 and shell wall 6, case lid 1 are one
It is whole, the outside connection gilled radiator 21 and corrugated plate 2 of oil trap 7, while improved case is located at outer casing bottom along 3, because
This case along 3 without limitation on the height and corrugated plate 2 of gilled radiator 21 the wide H3 of wave, the top of gilled radiator 21 and corrugated plate
2 tops are higher than shell case lid 1, when using this structure, before the height of gilled radiator 21 and the wide H3 ratio improvement of the wave of corrugated plate 2
Increase, the height H2+ (H3)/2 at the heat dissipation center of gilled radiator 21 and corrugated plate 2 increases, and heat dissipation effect is preferable, transformer top
Portion's oil temperature is lower.
As shown in figure 5, gilled radiator 21 or so uses dissymmetrical structure, the space utilization of radiator is improved to greatest extent
Rate, the arrangement of corrugated plate 2 and gilled radiator 21 along shell four sides is very compact, due to the height and ripple of gilled radiator 21
The wide H3 of the wave of piece 2 increases, and the piece number and wave height H4 of gilled radiator can be reduced, therefore transformer case area (length × wide
Degree) it can significantly reduce, result is exactly that the occupied area of transformer is reduced, and saves capital cost.
Preceding and improved two kinds of shells are improved, under the premise of guaranteeing that temperature of oil in transformer is identical, improved shell, by
In compact-sized, heat dissipation effect is more preferable, thus after improving ripple sheet weight+gilled radiator weight be less than improve before corrugated plate
Weight, material cost can be saved.
As shown in figure 4, improved case is located at 6 bottom of shell wall along 3, it is connected by bolts with bottom 4, this structure exists
When transformer carries out maintenance, boom hoisting is that maintenance is carried out after shell is lifted by crane, and hoist needed for boom hoisting is wanted
Ask not high, and boom hoisting just can be carried out maintenance after transformer body (iron core and coil) must being hung out from shell before improving
Maintenance, but the weight of transformer body is far longer than the weight of shell, therefore the hoist requirement to the boom hoisting at maintenance scene
It is higher.
As shown in part B in Fig. 6, improved shell tank wall lower part is usedShape structure, improve before usingKnot
The structure of structure, improved shell tank wall lower part can reduce the weight of shell and transformer oil.
Improved transformer outer case construction good heat dissipation effect, transformer overload ability is strong, and occupied area is small, and structure is tight
It gathers, the occupied area of power distribution room can be reduced, it is bigger especially suitable for seaonal load variation, overload capacity is required by force,
Or to the lesser occasion of the floor area requirement of transformer.
Embodiment two
The present embodiment clipped is identical as previous embodiment.
As shown in figure 9, existing Full-enclosed oil-immersed transformer, R1 is iron core column outer diameter, and R2 is internal coil diameter, and R3 is line
Outer diameter is enclosed, between iron core column outer diameter R1 and internal coil diameter R2, is provided with coil inner fiber container 30, existing hermetically sealed oil immersed type becomes
The rule that the oil stream direction of the coil oil clearance of depressor is not fixed, oil stream speed is slower, heat dissipation effect of the coil in transformer oil
Fruit is poor, and the temperature rise of coil is higher, and transformer overload ability is weak.
In order to enhance the overload capacity of transformer, the present invention further improves coil oil flow structure, as shown in Figure 10, this
At the online circle the initial segment of invention, interior oil baffle 40 is provided between coil inner fiber container 30 and internal coil diameter R2, and at interval one
At section distance, outer oil baffle 41, and interior oil baffle 40 and outer gear are provided between coil outer diameter R3 and coil outer fiber container 31
Oiled-plate method 41 is spaced apart to be arranged alternately, for guiding the oil stream direction of coil oil clearance.The oil stream of coil oil clearance of the invention
There is fixed rule in direction, and due to the effect of oil baffle in coil, arrow direction shows guiding oil stream as shown in Figure 10 for oily flowing
Structure, this oil stream structure can effectively accelerate oil stream speed, good heat dissipation effect of the coil in transformer oil, the temperature rise of coil
Low, transformer overload ability is strong.
Existing Full-enclosed oil-immersed transformer, the conducting wire on the inside of oil clearance carry out coiling, such as Figure 11 using flat by the way of
Shown, conducting wire the number of turns on the inside of this winding method oil clearance is less, and conducting wire the number of turns on the outside of oil clearance is more, causes on the inside of oil clearance
Conductor wire losses are far smaller than the conductor wire losses on the outside of oil clearance, therefore the conducting wire temperature rise on the outside of oil clearance and the conducting wire temperature rise on the inside of oil clearance
Differ larger, the conducting wire temperature rise on the outside of oil clearance is greater than the conducting wire temperature rise on the inside of oil clearance, and transformer overload is bigger, and oil clearance is inside and outside to lead
The temperature rise difference of line is bigger, can increase the aging speed of oil clearance inboard wire insulation, influence the service life of transformer.It adopts simultaneously
It is relatively differed with the transformer overload ability of this structure.
The present invention is arranged the conducting wire on the inside of oil clearance and carries out coiling by the way of using vertical, as shown in figure 12, this coiling side
Conducting wire the number of turns on the inside of formula oil clearance increases, and conducting wire the number of turns on the outside of oil clearance is reduced, so that the loss of oil clearance inboard wire suitably increases
Add, the loss of oil clearance outboard wire is suitably reduced, therefore the conducting wire temperature rise of oil clearance medial and lateral is relatively, and transformer overload is got over
Greatly, the temperature rise difference of the inside and outside conducting wire of oil clearance is smaller, and in transformer overload, the temperature rise of the inside and outside conducting wire of oil clearance, which is easy to control, is being marked
In temperature limit as defined in standard.The significant service life for extending transformer, while enhancing the overload capacity of transformer.
Embodiment three
The present embodiment clipped is identical as previous embodiment.
As shown in Figure 13 A-13C, iron core in the prior art, the section of iron core column and the section of iron core yoke are just the same,
The approximate oblate approximate circle or close ellipsoidal structure in section.The magnetic flux density of iron core column and the magnetic flux density of iron core yoke are complete
It is complete the same, it is propagated outward since the noise of iron core mainly passes through iron core column and iron core yoke, and it is cased with coil outside iron core column, line
Circle has certain shielding action to the noise of iron core column, and there is no the component of shielding outside iron core yoke, therefore iron core yoke
Noise it is larger to the influence of noise of transformer.The afterbody piece of iron core column and the afterbody piece of iron core yoke are of same size,
The clamping piece of iron core and the contact area of yoke piece afterbody piece are smaller, and the clamping effect of iron core yoke is poor, can also cause to make an uproar
Sound is larger.In addition, the iron core of this structure, no-load loss and no-load current are larger, and the temperature rise of iron core is also relatively high, transformer
Overload can ability relatively difference.
The section of iron core column of the invention is different with the section of iron core yoke, and as shown in figures 14 a-14 c, iron core removes first order iron
The piece of core yoke is wide identical with the piece width of first order iron core column outer, and the piece that the piece width of remaining iron core yoke at different levels is all larger than iron core column is wide,
The sectional area of the cross sectional shape approximation D-shaped of iron core yoke of the invention, iron core yoke increases, therefore the magnetic flux density of iron core yoke is greater than iron
The magnetic flux density of stem, the no-load loss and no-load current of iron core reduce, and noise reduces.Due to iron core yoke most final stage and clamping piece
Contact area increase, transformer noise can be reduced.Iron core yoke cross sectional shape approximation D-shaped of the invention, this iron yoke structure
The weight that iron core can be reduced reduces the no-load loss and no-load current of iron core.Iron core noise of the invention is smaller, the sky of iron core
Load-loss and no-load current are smaller, and the temperature rise of iron core is relatively low, and transformer overload ability is stronger.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to embodiment and attached drawing institute public affairs
The content opened both falls within protection of the present invention so all do not depart from the lower equivalent or modification completed of spirit disclosed in this invention
Range.
Claims (8)
1. a kind of compact exceeds loading capability low-temperature-rise power transformer comprising iron core, coil, transformer oil and shell,
The shell includes case lid, shell wall and bottom, is provided with corrugated plate on shell wall, it is characterised in that: the corrugated plate has four
A to be separately positioned on the four sides of shell wall, the transformer further includes that there is dismountable special-shaped chip of unsymmetric structure to dissipate
Hot device, the abnormity gilled radiator are arranged in corrugated plate two sides；
There are four longitudinal raised oil trap, the outside connection of oil trap is described dismountable different for four sides setting of the case lid
Shape gilled radiator and the corrugated plate；Case lid is wholely set with shell wall, and shell wall bottom is provided with case edge, and the case is along logical
It crosses bolt to be fixedly connected with bottom, wherein the top of the Special-shaped sheet formula radiator and the corrugated plate is higher than the case of the shell
Lid；
The lower part of the shell uses reversed convex type structure, and the composition concave shape of abnormity gilled radiator described in two adjacent groups is to surround
The corrugated plate setting.
2. compact as described in claim 1 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: the corrugated plate
Swell increment be slightly larger than transformer oil swell increment.
3. compact as described in claim 1 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: iron core column and line
It is provided with coil inner fiber container between circle, interior oil baffle is provided between coil inner fiber container and internal coil diameter, in coil outer diameter and line
Outer oil baffle is provided between circle outer fiber container, and interior oil baffle and outer oil baffle is spaced apart is arranged alternately, for drawing
The oil stream direction of loop oil clearance.
4. compact as claimed in claim 3 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: the interior gear oil
The oil stream direction of plate and the outer oil baffle guidance coil oil clearance is flowed at generally'S '-shaped.
5. compact as described in claim 1 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: on the inside of oil clearance
Conducting wire uses different winding methods from the conducting wire on the outside of oil clearance, and the conducting wire on the inside of oil clearance carries out coiling using vertical by the way of,
And the conducting wire on the outside of oil clearance carries out coiling using flat by the way of.
6. compact as described in claim 1 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: the iron core
The section of iron core column is approximate oblate or approximate circle or approximate ellipsoidal structure, and the sectional area of iron core yoke piece is greater than iron core
The sectional area of column piece, the cross sectional shape of the iron core yoke of the iron core are approximate D-shape configuration.
7. compact as claimed in claim 6 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: the iron core by
Multistage silicon steel sheet is made, and the wide piece equal to iron core yoke of piece of first order silicon sheet core column is wide, the iron core of remaining silicon steel sheet at different levels
The piece that the piece width of yoke is all larger than iron core column is wide.
8. compact as claimed in claim 7 exceeds loading capability low-temperature-rise power transformer, it is characterised in that: the first order
Silicon steel sheet is the silicon steel sheet of the wide maximum level of piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527474.XA CN108597744B (en) | 2018-05-29 | 2018-05-29 | A kind of compact exceeds loading capability low-temperature-rise power transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527474.XA CN108597744B (en) | 2018-05-29 | 2018-05-29 | A kind of compact exceeds loading capability low-temperature-rise power transformer |
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| Publication Number | Publication Date |
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| CN108597744A CN108597744A (en) | 2018-09-28 |
| CN108597744B true CN108597744B (en) | 2019-01-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4413674A (en) * | 1980-11-28 | 1983-11-08 | Westinghouse Electric Corp. | Transformer cooling structure |
| CN2594943Y (en) * | 2002-12-31 | 2003-12-24 | 特变电工衡阳变压器有限公司 | Cooling structure of oil immersion self cooling transformer |
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| KR20110134132A (en) * | 2010-06-08 | 2011-12-14 | 주식회사 효성 | Apparatus for connectiong radiator for transformer |
| CN203631251U (en) * | 2013-12-10 | 2014-06-04 | 江山市海维输变电科技有限公司 | Structure of corrugated oil tank of transformer |
| EP3293743A1 (en) * | 2016-09-12 | 2018-03-14 | ABB Schweiz AG | A cover for electric power devices filled with a dielectric liquid |
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| US4413674A (en) * | 1980-11-28 | 1983-11-08 | Westinghouse Electric Corp. | Transformer cooling structure |
| CN2594943Y (en) * | 2002-12-31 | 2003-12-24 | 特变电工衡阳变压器有限公司 | Cooling structure of oil immersion self cooling transformer |
| CN202142387U (en) * | 2011-07-18 | 2012-02-08 | 广东中鹏电气有限公司 | Iron core structure of transformer |
| CN206040400U (en) * | 2016-08-31 | 2017-03-22 | 中国西电电气股份有限公司 | Current -limiting is with continuous oil baffle |
| CN206421877U (en) * | 2017-01-03 | 2017-08-18 | 上海林佳医疗设备有限公司 | A kind of fuel tank of oil-filled transformer |
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| CN108597744A (en) | 2018-09-28 |
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Application publication date: 20180928 Assignee: Chengdu Hua Hua Electric Co., Ltd. Assignor: Guangzhou Yibian Power Source Equipment Co., Ltd. Contract record no.: X2020440000003 Denomination of invention: Compact type low temperature-rise power transformer with high overload capacity Granted publication date: 20190125 License type: Common License Record date: 20200107 |
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