CN205028764U - Traction transformer's shielding subassembly - Google Patents

Traction transformer's shielding subassembly Download PDF

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Publication number
CN205028764U
CN205028764U CN201520752011.5U CN201520752011U CN205028764U CN 205028764 U CN205028764 U CN 205028764U CN 201520752011 U CN201520752011 U CN 201520752011U CN 205028764 U CN205028764 U CN 205028764U
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China
Prior art keywords
shielding sheet
winding
shield assembly
traction transformer
earth connection
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Application number
CN201520752011.5U
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Chinese (zh)
Inventor
郝朝阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Datong Traction Transformers Co Ltd
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ABB Datong Traction Transformers Co Ltd
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Priority to CN201520752011.5U priority Critical patent/CN205028764U/en
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Abstract

The utility model discloses a traction transformer's shielding subassembly, including insulation support, shielding piece and earth connection, insulation support is the cylinder, the coiling of shielding piece is in insulation support's surface, form the opening between the head and the tail of shielding piece, the shielding piece with the earth connection is connected. Owing to be provided with the mutual interference that the shielding piece is used for shielding primary winding, auxiliary winding or power supply winding, has reduced harmonic current interference and voltage each other and disturbed to improve the supplementary or power supply loop job stabilization nature of net side mains operated quality and train.

Description

The shield assembly of traction transformer
Technical field
The utility model relates to traction transformer, particularly relates to a kind of shield assembly.
Background technology
Traction transformer utilizes electromagnetic induction principle, and transmitting a kind of electrical equipment of electric energy or signal transmission from a circuit to another circuit, is electrical energy transfer or the critical elements as Signal transmissions.For rail vehicle, traction transformer is one of most important equipment, is the most crucial part of whole traction generator, guarantees the rail vehicle stable operations such as locomotive, motor-car, city rail and high ferro.Since oneth century of past, traction transformer, usually for rail traction, is considered to the best alternative of conventional fuel oil trailer system.
For the traction transformer of railway electric locomotive and motor train unit, client's General Requirements transformer provides auxiliary winding or power supply winding, for providing power supply to locomotive subsidiary loop or train power supply loop, realize the running of the stand-by motor such as transformer oil pump, blower fan and the power source as air-conditioning in car and illumination.The rated voltage in these loops is general all very low, and be about 400V or 860V, in its loop, the rated withstand voltage of device is general also lower.And a winding in traction transformer is connected with the electrical network of 25kV.When a winding and auxiliary winding or winding of powering is adjacent arrange time, one time winding voltage can channel to auxiliary winding or power supply winding by distributed capacitance, cause auxiliary winding or power supply winding output voltage occur fluctuation and promote, time serious, cause the damage of subsidiary loop or power supply winding device.When auxiliary winding or the work of power supply winding, its harmonic current also can interfere with a winding impact net side power quality simultaneously.
Therefore, be necessary to design and a kind ofly can shield winding shield assembly to the traction transformer of the interference of auxiliary winding or power supply winding.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and can shield winding shield assembly to the traction transformer of the interference of auxiliary winding or power supply winding.
The technical solution of the utility model provides a kind of shield assembly of traction transformer, comprise insulating supporting, shielding sheet and earth connection, described insulating supporting is cylindrical shape, described shielding sheet is wound on the outer surface of described insulating supporting, form opening between the head and the tail of described shielding sheet, described shielding sheet is connected with described earth connection.
Preferably, described shield assembly is at once winding and auxiliary winding or between a winding and power supply winding, described insulating supporting is enclosed in the outside of a described winding.
Preferably, described shield assembly also comprises insulation board, and described insulation-panel packets is trapped among the outside of described shielding sheet.
Preferably, described shielding sheet is comb teeth shape, many spaced tooth bars that described shielding sheet comprises body and extends from described body.
Preferably, described tooth bar is mutually vertical with described body, between many described tooth bars equidistantly.
Preferably, wherein a described tooth bar is connected with described earth connection, and the described tooth bar be connected with described earth connection comprises at least one pair of auricle, for encasing described earth connection and welding with described earth connection after auricle described in a pair bends relatively.
Preferably, the width of the described opening of described shielding sheet is 30-60mm.
Preferably, described shielding sheet is made up of copper or aluminium.
Preferably, the thickness of described shielding sheet is 0.2mm-0.35mm.
After adopting technique scheme, there is following beneficial effect: owing to being provided with shielding sheet for shielding the mutual interference of winding, auxiliary winding or a power supply winding, decrease harmonic current interference each other and voltage disturbance, thus side Power supply quality is netted in improvement and train is assisted or the stability of current supply circuit work.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the using state of the shield assembly of traction transformer in the utility model one embodiment;
Fig. 2 is the structural representation that the shielding sheet of traction transformer in the utility model one embodiment launches;
Fig. 3 is the partial enlarged drawing at A place in Fig. 2.
The Reference numeral table of comparisons:
10-shield assembly 20-winding 30-assists winding
11-insulating supporting 12-shields sheet 120-opening
121-body 122-tooth bar 123-auricle
Embodiment
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, shield assembly 10 comprises insulating supporting 11, shielding sheet 12 and earth connection (not shown), and insulating supporting 11 is cylindrical shape, and shielding sheet 12 is wound on the outer surface of insulating supporting 11, namely shields the outer surface that sheet 12 is attached to insulating supporting 11.Form opening 120 between the head and the tail of shielding sheet 12, namely shield the head and the tail of sheet 12 and be not connected, and shield sheet 12 and pass through ground connection.
Motor-car, locomotive power supply power supply are single-phase overhead contact net lines, the vehicle that this netting twine runs can be a lot, and mobile unit is all powerful switch element at present, a large amount of harmonic waves can be produced during work, and feed back to electrical network, add the fluctuation of online pressure, electrical network is caused to have very large harmonic wave and overvoltage, because auxiliary coil volume is less, carry the voltage loads that load mostly is 380V, if do not shield sheet 12, the humorous overvoltage that involves can be delivered to auxiliary winding 30, the operating voltage of too high auxiliary winding 30, meeting scaling loss loop element; After increasing shielding sheet 12, this voltage first must could arrive auxiliary winding 30 through shielding sheet 12, and due to shielding sheet 12 ground connection, this energy is progressively discharged into the earth, weakens or eliminates this interference, thus improving the stability of subsidiary loop work.
The head and the tail of shielding sheet 12 do not connect, and shielding sheet 12 is meeting generation current under the impact of a winding 20, electric current can be discharged by ground connection.If shielding sheet 12 is end to end, electric current can be short-circuited in shielding sheet 12, burns shielding sheet 12.
Insulating supporting 11 serves the effect of support to shielding sheet 12 1 aspect, shielding sheet 12 can be wound on insulating supporting 11 and form cylindrical shape, for surrounding a winding 20; On the other hand, insulating supporting 11 serves the effect of insulating to shielding sheet 12, and due to shielding sheet 12 meeting generation current under the impact of a winding 20, insulating supporting 11 prevents the electric current shielding sheet 12 from importing on a winding 20.
In the present embodiment, as shown in Figure 1, shield assembly 10 is once between winding 20 and auxiliary winding 30, and insulating supporting 11 is enclosed in the outside of a winding 20, and barricade 12 is wound on the outer surface of insulating supporting 11, and auxiliary winding 30 is positioned at the outside of barricade 12.Shielding part 12 serves the effect of isolation winding 20 and auxiliary winding 30, reduces a winding to the interference of auxiliary winding.
Preferably, shield assembly 10 also comprises insulation board (not shown), and insulation-panel packets is trapped among the outside of shielding sheet 12.Insulation board prevents the electric current shielding sheet 12 from having imported on auxiliary winding 30.In the present embodiment, insulation board is not set, maintains a certain distance between shielding sheet 12 and auxiliary winding 30, serve the effect preventing electric current from importing equally.
Preferably, auxiliary winding 30 can also replace with power supply winding.Rated voltage due to current supply circuit is general also very low, time adjacent with a winding 20, is also easily subject to the impact of a winding 20.Therefore, when winding of powering is adjacent with a winding, also need to arrange shield assembly for shielding the interference of a winding between power supply winding and a winding.
In the present embodiment, as shown in Figure 2, shielding sheet 12 is comb teeth shape, many spaced tooth bars 122 that shielding sheet 12 comprises body 121 and extends from body 121.Tooth bar 122 is mutually vertical with body 121, between many tooth bars 122 equidistantly.Between many tooth bars 122, interval is arranged, and can reduce the weight of shielding sheet 12 on the one hand, saves material; On the other hand, form electric capacity between adjacent rack 122, multiple electric capacity dispersion electric discharge, makes can not produce larger impact during electric discharge.
Preferably, the distance between tooth bar 122 may not be equally spaced, can also be in tilted layout between tooth bar 122 and body 121.
In the present embodiment, as Figure 2-3, wherein a toothed rack 122a is connected with earth connection (not shown), and the tooth bar 122a be connected with earth connection comprises two pairs of auricles 123, for encasing earth connection and welding with earth connection after often pair of auricle 123 bends relatively.
Preferably, auricle 123 can also be a pair, or multipair.
Preferably, the width of the opening 120 of shielding sheet 12 is 30-60mm, is preferably 40mm.
Preferably, shield sheet 12 to be made up of copper or aluminium.Copper and aluminium have not magnetic conductivity and good conductivity, can be led away by electric current by earth connection.Shielding sheet 12 can also be albronze, or the material such as almag is made.
Preferably, the thickness shielding sheet 12 is 0.2mm-0.35mm.If the thickness of shielding sheet 12 is too thick, be not easy bending and winding on insulating supporting 11; If too thin, easily rupture during bending, and electric current is also not easy to lead away.
The utility model has the following advantages:
1, winding voltage disturbance to auxiliary winding or power supply winding is reduced;
2, the humorous wave interference of mains by harmonics to subsidiary loop or current supply circuit is decreased;
3, the damage of subsidiary loop element or current supply circuit is avoided;
4, by multiple electric capacity dispersion electric discharge, make can not produce larger impact during electric discharge.
Above-described is only principle of the present utility model and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the utility model principle, other modification some can also be made, also should be considered as protection range of the present utility model.

Claims (9)

1. the shield assembly of a traction transformer, it is characterized in that, comprise insulating supporting (11), shielding sheet (12) and earth connection, described insulating supporting (11) is cylindrical shape, described shielding sheet (12) is wound on the outer surface of described insulating supporting (11), form opening (120) between the head and the tail of described shielding sheet (12), described shielding sheet (12) is connected with described earth connection.
2. the shield assembly of traction transformer according to claim 1, it is characterized in that, described shield assembly (10) is positioned at a winding (20) and auxiliary winding (30) or between a winding (20) and power supply winding, described insulating supporting (11) is enclosed in the outside of a described winding (20).
3. the shield assembly of traction transformer according to claim 1, is characterized in that, described shield assembly (10) also comprises insulation board, and described insulation-panel packets is trapped among the outside of described shielding sheet (12).
4. the shield assembly of traction transformer according to claim 1, it is characterized in that, described shielding sheet (12) is comb teeth shape, many spaced tooth bars (122) that described shielding sheet (12) comprises body (121) and extends from described body (121).
5. the shield assembly of traction transformer according to claim 4, is characterized in that, described tooth bar (122) is mutually vertical with described body (121), between many described tooth bars (122) equidistantly.
6. the shield assembly of traction transformer according to claim 4, it is characterized in that, wherein a described tooth bar (122) is connected with described earth connection, the described tooth bar (122) be connected with described earth connection comprises at least one pair of auricle (123), for encasing described earth connection and welding with described earth connection after auricle described in a pair (123) bends relatively.
7. the shield assembly of traction transformer according to claim 1, is characterized in that, the width of the described opening (120) of described shielding sheet (12) is 30-60mm.
8. the shield assembly of traction transformer according to claim 1, is characterized in that, described shielding sheet (12) is made up of copper or aluminium.
9. the shield assembly of traction transformer according to claim 1, is characterized in that, the thickness of described shielding sheet (12) is 0.2mm-0.35mm.
CN201520752011.5U 2015-09-25 2015-09-25 Traction transformer's shielding subassembly Active CN205028764U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520752011.5U CN205028764U (en) 2015-09-25 2015-09-25 Traction transformer's shielding subassembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520752011.5U CN205028764U (en) 2015-09-25 2015-09-25 Traction transformer's shielding subassembly

Publications (1)

Publication Number Publication Date
CN205028764U true CN205028764U (en) 2016-02-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106531414A (en) * 2016-12-20 2017-03-22 成都线易科技有限责任公司 Transformer and control and driving system
CN107123526A (en) * 2016-02-25 2017-09-01 上海龙怡机电材料有限公司 The production method of insulating cylinder with function of shielding
CN108806956A (en) * 2017-05-05 2018-11-13 台湾东电化股份有限公司 transformer
CN108831700A (en) * 2018-06-14 2018-11-16 美的集团股份有限公司 Transformer and electrical equipment including it

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107123526A (en) * 2016-02-25 2017-09-01 上海龙怡机电材料有限公司 The production method of insulating cylinder with function of shielding
CN106531414A (en) * 2016-12-20 2017-03-22 成都线易科技有限责任公司 Transformer and control and driving system
CN108806956A (en) * 2017-05-05 2018-11-13 台湾东电化股份有限公司 transformer
CN108806956B (en) * 2017-05-05 2021-02-09 台湾东电化股份有限公司 Transformer device
CN108831700A (en) * 2018-06-14 2018-11-16 美的集团股份有限公司 Transformer and electrical equipment including it

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