CN104576012A - Assembly method and structure for transformer body - Google Patents
Assembly method and structure for transformer body Download PDFInfo
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- CN104576012A CN104576012A CN201410809137.1A CN201410809137A CN104576012A CN 104576012 A CN104576012 A CN 104576012A CN 201410809137 A CN201410809137 A CN 201410809137A CN 104576012 A CN104576012 A CN 104576012A
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Abstract
The invention discloses an assembly method for a transformer body. The assembly method comprises the following steps that support tools are uniformly arranged on an iron core; a coil assembly sleeves the iron core or is winded on the iron core, and is tightly tied and fixed; heat expansion glass fiber felt with a proper thickness is placed into non-volatile insulation paint to be soaked for obtaining a composition; the composition of the heat expansion glass fiber felt and the non-volatile insulation paint are inserted into a gap formed between the iron core and the coil assembly; the assembly is completed after the composition of the heat expansion glass fiber felt and the non-volatile insulation paint are completely dried and cured. The assembly method has the advantages that an original support strip beating assembly mode can be replaced, the operation work intensity is reduced, in addition, the iron core and the coil can be effectively combined into a whole, and the short-circuit-impact-resistant capability of a coil of a three-dimensional stereo wound core transformer and a traditional laminated transformer can be effectively improved. The structure of the transformer body meets the fastening requirements of a stereo wound core on the iron core and the coil.
Description
Technical field
The present invention relates to a kind of assembly method of transformer body and a kind of structure of transformer body, be specifically related to a kind ofly utilize the method for thermal expansion glass fibrofelt and non-volatile insulating varnish assembling transformer device body and utilize the method to assemble the structure of transformer body obtained, belong to field transformer.
Background technology
Unshakable in one's determination and coil is as the important core component of transformer, their performance directly determines the performance of power transformer product, but transformer is in transport or running, loosening easily appears in unshakable in one's determination and coil, for ensureing the safety and reliability of power transformer product, unshakable in one's determination must fasteningly reliably can not produce relative loosening completely with between coil, in traditional structure of transformer body, great majority adopt in the space between iron core and coil and insert insulating stay, the shortcoming brought like this is exactly that stay directly extrudes iron core and coil, finally may cause unshakable in one's determination and coil is impaired and affect the performance of transformer.Particularly high voltage, jumbo product, or structure and the special product of material, such as 1lOkv and above product, three dimensional wound core structure or non-crystaline amorphous metal product etc., its property makes the requirement of transformer body higher.The particularity of rewinding material structure, iron yoke and stem is made to connect together and cause the stem of iron yoke bottom and the space of coil can not insert stay, and the particularity of non-crystaline amorphous metal own material, the thrust of stay can not be subject to, therefore traditional structure of transformer body can not meet the demands, be further improved and optimize.
In addition, squeeze into inside coil paper tube and between core limb stay or core limb add surround plate after be inserted in coil and make coil effectively fixing, in such assembly technology, because the gap inside coil and between iron core is theory calculate, and objectively there is certain fabrication error aborning in the evenness on core limb surface and circularity, add the dried contraction of cardboard, no matter be adopt add coaming plate technique or beat stay technique, between in fact dried low-voltage coil and iron core, desirable fixed effect can not be reached.Meanwhile, irregular due to gap, when squeezing into narrower position stay in the process of beating stay, difficulty is comparatively large, often there will be stay and does not squeeze into completely and subscribe position and be forced to fracture stay; To loose position, then need the cardboard superposing some, the requirement of stretching could be met.Such process structure, can expend longer time and larger labour intensity when device body assembles on the one hand; Be on the other hand, the stay squeezed into can not make the contact-making surface of internal coil diameter reach with the outer surface of core limb to contact completely completely, may only have indivedual point cantact, making is not actual effective fixing between coil and iron core, causes the power transformer product anti-short circuit capability that is in operation to be deteriorated.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, one aspect of the present invention provides a kind of assembly method of transformer body, utilize the thermal expansion glass fibrofelt of different-thickness and non-volatile insulating varnish, after a series of special process process, thermal expansion glass fibrofelt after dipping lacquer is placed between coil inner fiber container and core limb, at transformer body by after vacuum dryer drying and processing, thermal expansion glass fibrofelt and insulating varnish composition expansion molding, make coil and stretching unshakable in one's determination, reach fixed coil effect.On the other hand, the present invention also provides a kind of structure of transformer body utilizing the assembly method of thermal expansion glass fibrofelt and non-volatile insulating varnish to obtain.
The technical solution used in the present invention is:
An assembly method for transformer body, comprises the steps: A, prepares iron core, iron core arranges supporting tool equably; B, on iron core suit or coiling assembly, and tighten up in the peripheral colligation of coil block, coil block wherein comprises coil and coil inner fiber container; C, according to the void size between unshakable in one's determination and coil block the thermal expansion glass fibrofelt of suitable thickness to be positioned in non-volatile insulating varnish and to soak, obtain the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish; D, the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is inserted in the space between iron core and coil block; E, after the composition bone dry of thermal expansion glass fibrofelt and non-volatile insulating varnish solidifies, complete assembling.
Further, described step C also comprises: be positioned over by thermal expansion glass fibrofelt in non-volatile insulating varnish to soak to take out after 2 to 4 hours and quietly put and drip paint, make the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish be in half soft state.Further, described step C also comprises: be wound around with electrician's crimped paper and seal the end of the composition of described thermal expansion glass fibrofelt and non-volatile insulating varnish, making said composition can directly insert between iron core and coil block after wrapping.
Preferably, described step D also comprises, and compartment of terrain between the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish and each supporting tool is arranged.
Further, described step e also comprises: carried out curing process by the transformer body assembly of entirety, and stoving temperature is within 130 degrees Celsius, within being preferably 120 degrees Celsius; Or by the static placement of transformer body assembly 36 to 60 hours of entirety, then carry out curing process, stoving temperature is within 130 degrees Celsius, within being preferably 120 degrees Celsius.
The structure of transformer body utilizing the assembly method of above-mentioned transformer body to obtain, comprises iron core and coil block.Described iron core is fixedly installed supporting tool, the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is arranged between iron core and coil block, and the composition of described thermal expansion glass fibrofelt and non-volatile insulating varnish makes described iron core and described coil block be combined into an entirety after dry solidification.Preferably, between the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish and each supporting tool, compartment of terrain is arranged.
Preferably, the bottom of described structure of transformer body is provided with the shrouding avoiding painting liquid outflow.
Beneficial effect of the present invention is: during assembling transformer device body need not the space between the core limb of transformer and coil inner fiber container carry out stay join beat, only need by thermal expansion glass fibrofelt and non-volatile insulating varnish according to a series of technique, after making specific group compound, put into corresponding space, such assembly technology is simple, and fast, labour intensity is low, even if also can carry out the placement of stay between the trigonum in solid wound core transformer core upper yoke smoothly, operability is high; The composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is after super-dry and after setting expansion in addition, radian, the male and fomale(M&F) of its expanding noodles and iron core column coincide, contact area is large, make coil and core pressing stressed more even, and the stay of the traditional wooden and papery of hardness ratio after its solidification is also greatly, successful.
In the device body assembly technology of three-dimensional rolled iron core and traditional laminated transformer, substituting original assembling mode of beating stay by assembly method of the present invention has very great meaning.The work not only alleviating operation is strong, and makes iron core and coil effectively can be combined into an entirety, the ability that the Short Circuit withstand effectively improving three-dimensional rolled iron core transformer and traditional laminated transformer coil impacts.
Accompanying drawing explanation
Fig. 1 is traditional transformer body assembling schematic diagram;
Fig. 2 is the flow chart according to assembly method of the present invention;
Fig. 3 assembles according to assembly method of the present invention the structure of transformer body schematic diagram obtained.
Embodiment
With reference to Fig. 1, in the process that the device body of assembling transformer assembles, need mounting coil on unshakable in one's determination 1, stay 2 is squeezed into inside coil paper tube 3 and between core limb, or after core limb adds encirclement plate, be inserted in coil paper tube 3, if find to press compact not or excesssive gap between coil paper tube 3 and unshakable in one's determination 1, then to continue to squeeze into stay 2.Therefore, traditional mode assembling transformer device body passing through to beat stay can cause the problems such as assembly precision is low, assembling difficulty, assembly structure are insecure.
According to one embodiment of present invention, use thermal expansion glass fibrofelt to generate composition after immersion treatment in non-volatile insulating varnish, non-volatile insulating varnish wherein can preferably adopt the trade mark to be the non-volatile insulating varnish of Better 116HU.With reference to Fig. 2 and Fig. 3, suit or coiling paper web 3 after the periphery of unshakable in one's determination 1 arranges support bar 2, then the composition adhesive tape of the thermal expansion glass fibrofelt after dipping lacquer and non-volatile insulating varnish is packaged into bar compositions 21, the thickness of bar compositions 21 is slightly less than, does not then need to beat and can be placed directly between coil inner fiber container 3 and unshakable in one's determination 1.Transformer body is carried out drying and processing by vacuum dryer, makes to be arranged on bar compositions 21 expansion molding between coil inner fiber container 3 and unshakable in one's determination 1, thus make coil and stretching unshakable in one's determination, reach the effect of fixed coil.Finally obtain more firmly transformer body assembly structure.
Below by testing more specifically, describe according to transformer body assembly method of the present invention:
1) the thermal expansion glass fibrofelt of 2mm, 4mm and measured length thickness is put into insulating varnish to soak, measure under different soak times, insulating varnish is to the infiltration situation of thermal expansion glass fibrofelt.Through test data sheet, thermal expansion glass fibrofelt is in two hours periods of immersion, measuring its gauge is respectively all 2.14mm, 4.15mm, compare with original thickness size and change not quite, but soak time more than two hours after, thermal expansion glass fibrofelt starts to increase in the size of thickness direction, after have passed through 4.5 hours, measures and is respectively 2.19mm, 4.53mm.By analysis, thermal expansion glass fibrofelt, after the immersion more than two hours, has started deliquescing silk, thereafter the immersion thermal expansion glass fibrofelt of two hours is placed on indoor fixed mount, does not have spontaneous curing at normal temperatures through observing.By this experiment, summarizing the best soak time of thermal expansion glass fibrofelt in non-volatile insulating varnish is two hours, and the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish at normal temperatures can not spontaneous curing.
2) 12 6mm prefabricated cardboard stays are uniformly distributed are fixed on circumference unshakable in one's determination, use again 3mm paper web around, and fix with binding strap, at peripheral two ends each colligation one iron wire more up and down of paper web, require after completing colligation to ensure 6mm gap between unshakable in one's determination and paper web, insulating varnish immersion taking-up in 2 hours is put into by cutting the thermal expansion glass fibrofelt that length is 460mm, thickness is 4mm, quiet putting dripped paint after 40 minutes, and now the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is in half soft state.Press the folded winding of overlap joint 1/3 and seal end with electrician's crimped paper, the thickness that the composition now measuring thermal expansion glass fibrofelt and non-volatile insulating varnish bandages is 5.5mm, is then inserted in one by one in the neutral gear in iron core and paper web between cardboard stay.In operation, thermal expansion glass fibrofelt can vertically or bending in micro-tight state insert down with the composition of non-volatile insulating varnish, note during insertion retaining 30mm length outside paper web upper end, to check that it is in paper web and outer range of expansion and solidification situation, its entirety last is put into baker and is heated to 125 DEG C, checked after 5 hours, the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish does not also solidify, also in soft state, wait to cure and come out of the stove for 20 hours, check that the composition solidification of thermal expansion glass fibrofelt and non-volatile insulating varnish is good, expansion the puts in place (radian of stay expanding noodles and iron core column, male and fomale(M&F) coincide, paper web outside does not reach 9 ~ 10mm by spatial limitation demi-inflation thickness).By this test, the composition summarizing thermal expansion glass fibrofelt and non-volatile insulating varnish, as fixed stay, is placed between iron core and coil inner fiber container, and temperature 125 DEG C, under the drying condition of 20 hours, solidification and expansion are well.
3) alternatively, same being uniformly distributed by 12 6mm prefabricated cardboard stays is fixed on circumference unshakable in one's determination, use again 3mm paper web around, and fix with binding strap, at peripheral two ends each colligation one iron wire more up and down of paper web, require after completing colligation to ensure 6mm gap between unshakable in one's determination and paper web, put into insulating varnish immersion taking-up in 2 hours by cutting the thermal expansion glass fibrofelt that length is 460mm, thickness is 4mm, now the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is in half soft state.Press the folded winding of overlap joint 1/3 and seal end with electrician's crimped paper, the thickness that the composition now measuring thermal expansion glass fibrofelt and non-volatile insulating varnish bandages is 5.5mm, is then inserted in one by one in the neutral gear in iron core and paper web between cardboard stay.In operation, thermal expansion glass fibrofelt can vertically or bending in micro-tight state insert down with the composition of non-volatile insulating varnish, note during insertion retaining 30mm length outside paper web upper end, to check that it is in paper web and outer range of expansion and solidification situation, after completing whole insertion process, quietly put 2 days 48 totally hours, find that ground has paint to drip on ground, paper web also can be seen the vestige of paint infiltration, its entirety last is put into baker and is heated to 110-115 DEG C, the empty 80-100Pa of fidelity, come out of the stove after curing 25 hours, check that the composition solidification of thermal expansion glass fibrofelt and non-volatile insulating varnish is good, expansion puts in place, too much owing to inserting stay strip paint, cause stay with unshakable in one's determination, paper web bonds together, particularly paper web bottom, bonding more firm.(radian, the male and fomale(M&F) of stay expanding noodles and iron core column coincide, and paper web outside does not reach 8 ~ 9mm by spatial limitation demi-inflation thickness).By this test, the composition summarizing thermal expansion glass fibrofelt and non-volatile insulating varnish, as transformer body fixed stay, is placed between iron core and coil inner fiber container, and under the relevant drying condition of simulator body drying, solidification and expansion are well.
In the present embodiment, shrouding can be set in the bottom of transformer body, flow out to avoid the paint liquid in assembling process.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.In protection scope of the present invention, its technical scheme and/or execution mode can have various different modifications and variations.
Claims (9)
1. an assembly method for transformer body, is characterized in that, comprises the steps:
A, preparation (1) unshakable in one's determination, (1) unshakable in one's determination arranges supporting tool equably;
B, at unshakable in one's determination (1) upper suit or coiling assembly (3), and to tighten up in the peripheral colligation of coil block (3);
C, according to the void size between unshakable in one's determination (1) with coil block (3) the thermal expansion glass fibrofelt of suitable thickness to be positioned in non-volatile insulating varnish and to soak, the composition of acquisition thermal expansion glass fibrofelt and non-volatile insulating varnish;
D, the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is inserted in the space between iron core (1) and coil block (3);
E, after the composition bone dry of thermal expansion glass fibrofelt and non-volatile insulating varnish solidifies, complete assembling.
2. the assembly method of transformer body according to claim 1, is characterized in that, described step C also comprises:
Thermal expansion glass fibrofelt is positioned in non-volatile insulating varnish to soak to take out after 2 to 4 hours and quietly puts and drip paint, make the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish be in half soft state.
3. the assembly method of transformer body according to claim 2, is characterized in that, described step C also comprises:
Be wound around with electrician's crimped paper and seal the end of the composition of described thermal expansion glass fibrofelt and non-volatile insulating varnish, said composition can directly be inserted between iron core (1) and coil block (3) after wrapping.
4. the assembly method of transformer body according to claim 1, is characterized in that, described step D also comprises:
Compartment of terrain between the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish and each supporting tool is arranged.
5. the assembly method of a kind of transformer body according to claim 1, is characterized in that, described step e also comprises:
Carried out curing process by the transformer body assembly of entirety, stoving temperature is within 130 degrees Celsius, within being preferably 120 degrees Celsius.
6. the assembly method of transformer body according to claim 1, is characterized in that, described step e also comprises:
By the static placement of transformer body assembly 36 to 60 hours of entirety, then carry out curing process, stoving temperature is within 130 degrees Celsius, within being preferably 120 degrees Celsius.
7. utilize the structure of transformer body that the assembly method of the transformer body according to any one of claim 1 to 6 is assembled, comprise iron core (1) and coil block (3), it is characterized in that: (1) is fixedly installed supporting tool to described iron core, the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish is arranged between iron core (1) and coil block (3), and the composition of described thermal expansion glass fibrofelt and non-volatile insulating varnish makes described iron core (1) and described coil block (3) be combined into an entirety after dry solidification.
8. structure of transformer body according to claim 7, is characterized in that: between the composition of thermal expansion glass fibrofelt and non-volatile insulating varnish and each supporting tool, compartment of terrain is arranged.
9. structure of transformer body according to claim 7, is characterized in that: the bottom of described structure of transformer body is provided with the shrouding avoiding painting liquid outflow.
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| CN201410809137.1A CN104576012B (en) | 2014-12-19 | 2014-12-19 | Assembly method and structure for transformer body |
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| CN104576012B CN104576012B (en) | 2017-05-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105047383A (en) * | 2015-08-20 | 2015-11-11 | 王永法 | Anti-short circuit oil-immersed transformer body and fabrication method thereof |
| CN105869875A (en) * | 2016-06-06 | 2016-08-17 | 柳州市海格电气有限公司 | Manufacturing method for 10-kV dry-type amorphous alloy iron core distribution transformer |
| CN108729998A (en) * | 2017-04-17 | 2018-11-02 | 上海汽车集团股份有限公司 | Catalytic converter and its assemble method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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