CN102931747A - Electric connection structure of coil knuckle of stator winding - Google Patents
Electric connection structure of coil knuckle of stator winding Download PDFInfo
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- CN102931747A CN102931747A CN2012104548514A CN201210454851A CN102931747A CN 102931747 A CN102931747 A CN 102931747A CN 2012104548514 A CN2012104548514 A CN 2012104548514A CN 201210454851 A CN201210454851 A CN 201210454851A CN 102931747 A CN102931747 A CN 102931747A
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Abstract
The invention discloses an electric connection structure of a coil knuckle of a stator winding. An overall plan that a conductive function and a ventilating and radiating function take respective duty is adopted. The tip of one end of a ventilating tube of each stator bar is stripped and locally insulated, connected by a lead and connected with a joint of folded yarns of upper and lower stator bars through resistors to play a potential clamping role; the noise of a copper strand wire of taking charge of the conductive function is electrically connected, so that according to a certain rule, the stator bars of a generator are mutually connected to form an armature winding, namely a stator winding of the generator, and a nonmagnetic metal square tube taking charge of the ventilating and radiating function is connected with the joint of the folded yarns of the upper and lower stator bars by the resistors so as to achieve the potential clamping role; therefore, the strength of discharge current is controlled; the circulating current loss of the stator bars is removed; the stray losses are reduced, and the efficiency and the reliability of the generator are improved.
Description
Technical field: the present invention relates to a kind of stator winding bar nose connecting structure for electrical equipment.
Background technology: be accompanied by the development of economic technology, the electrical network scale constantly enlarges, the market demands such as energy-saving and cost-reducing, sustainable development, impel the generator single-machine capacity constantly to increase, the key issue of turbo generator high capacity is that the thermal energy transfer that the various losses in the generator produce is distributed, otherwise these heat energy constantly accumulation can cause the temperature of generator inner structure constantly to raise, the operation of harm generator, even burn generator.
The turbo generator synchronous speed is up to 3000r/min, the suffered centrifugal force of rotor structure is large, be subjected to the restriction of the strength of materials limit of the rotor parts such as rotating shaft, retrained stator of steam turbine generator, the full-size of the section of rotor, circuit, magnetic circuits etc. depend on cross dimensions, and to increase to satisfy the condition that capacity increases restrained, the design of turbo generator high capacity is restricted, electricity, the transmission of the heat energy that the magnetic equal loss produces is distributed becomes design focus and restriction bottleneck, turbo generator magnetic pole logarithm is few in addition, stator parallel branch number is also few, the every utmost point excitation capacity of rotor is large, make this contradiction more outstanding, round electricity, the problem of distributing of the heat energy that the magnetic equal loss produces has formed the various structures type of turbo generator at design form, be accompanied by the raising of capacity, the structure even more complex that heat energy distributes.
That the gas cooled generator has is simple in structure, reliable, operation maintenance equipment is few, the advantage of easy maintenance, can improve radiating effect by selecting different gaseous species, pressure, and the heat energy that satisfies generator distributes requirement.But because the restriction of designing technique level, the technology of gas cooled generator in the past can only be applied on the medium and small generator, reason is that the radiating effect of gas under project organization scheme in the past can not satisfy more that the heat energy of heavy-duty generator distributes requirement, the structure difference that forms the line rod of stator winding, then the nose connecting structure for electrical equipment of line rod also will be complementary with it, otherwise can produce heating loss's technical problem.
Summary of the invention:
The purpose of this invention is to provide a kind of stator winding bar nose connecting structure for electrical equipment.Technical scheme of the present invention is: a kind of stator winding bar nose connecting structure for electrical equipment, stator winding is made of by this connecting structure for electrical equipment the gas cooled generator stator bar, the gas cooled generator stator bar is by the conduction strand, air pipeline, main insulation consists of, the type of cooling of stator bar is the gas interior cooling, air pipeline is positioned at the center of stator bar, thin-walled nonmagnetic metal square tube vertical arrangement by appearance coated insulation layer forms, conduction strand appearance coated insulation layer, online excellent straightway conduction strand, be arranged in air pipeline around, the conduction strand rotates centered by air pipeline and holds online excellent two ends arc, and the conduction strand is in the both sides of air pipeline vertical arrangement; The conduction strand is born the conducting function of stator bar, and the insulating barrier that the conduction strand appearance of two corresponding stator bars coats at the nose position is stripped from, and mutually overlaps and welds together, and forms stator winding conduction connecting path; Air pipeline is only born draught effect, do not participate in the conducting function of stator bar, the insulating barrier that appearance coats is peeled off in the part, an end termination that consists of whole thin-walled nonmagnetic metal square tubes of air pipeline, link together with wire, form electrical connection, and be connected by the strand joint of resistance with upper and lower layer stator bar.Technique effect of the present invention: because copper strand wire appearance coated insulation layer, the copper strand wire of mutually insulated has carried out twining transposition round the nonmagnetic metal square tube array of mutually insulated, be that each root copper strand wire all replaces by the different position of stator bar section, eliminated the impact of leakage flux component, make the induced potential of each root copper strand wire all identical, the circulation fever phenomenon that links together and then can not produce at the stator stator winding, so can allow the copper strand wire of these mutually insulateds be connected in parallel at nose, and make each be connected to each other according to certain rules the formation stator winding, bear the conducting function of stator winding; The nonmagnetic metal square tube does not participate in the conducting function of stator bar, this is owing to be to guarantee that the ventilation of nonmagnetic metal square tube is unimpeded, guarantee the cooling effect of stator bar, it is smooth that the formed air duct of nonmagnetic metal square tube should be slided following current, can not twine transposition, if the nonmagnetic metal square tube participates in the conducting function of stator bar, then can produce circulation loss owing to the potential difference of each nonmagnetic metal square tube, so, the nonmagnetic metal square tube is only born the air pipeline effect, does not participate in the conducting function of stator bar.Insulation is peeled off by the part in one end termination of all stator bar ventilation ducts, link together with wire, and by resistance and upper, the strand joint of lower floor's stator bar connects, reached the effect that current potential is clamped down on, it is the current potential of nonmagnetic metal square tube and upper, the current potential of the strand joint of lower floor's stator bar is basic identical, avoid existing too high potential difference accumulate static charge to cause discharge in insulation or punch-through, adopting resistance to connect is because the nonmagnetic metal square tube of mutually insulated connects the stator bar two ends, and there is complicated capacitive coupling phenomenon between the copper strand wire of responsible conducting function, although each nonmagnetic metal square tube only has a bit with upper, the strand joint of lower floor's stator bar is connected, but still have a circulation of larger leakage current, generation loss heating, the current potential that adopts resistance to connect can to make leakage current be reduced to predetermined value and nonmagnetic metal square tube and upper, the potential difference of the strand joint of lower floor's stator bar is also in the acceptable scope.
Description of drawings:
Fig. 1 is stator winding bar nose connecting structure for electrical equipment schematic diagram of the present invention
Fig. 2 is the partial enlarged drawing of Fig. 1
Embodiment:
As shown in Figure 1, a kind of stator winding bar nose connecting structure for electrical equipment, stator winding is made of by this connecting structure for electrical equipment the gas cooled generator stator bar, the gas cooled generator stator bar is made of conduction strand 1, air pipeline 2, main insulation 3, the type of cooling of stator bar is the gas interior cooling, air pipeline 2 is positioned at the center of stator bar, is made of conduction strand 1 appearance coated insulation layer thin-walled nonmagnetic metal square tube 4 vertical arrangements of appearance coated insulation layer; Online excellent straightway, conduction strand 1 be arranged in air pipeline 2 around, conduction strand 1 rotates centered by air pipeline 2 and holds; Online excellent two ends arc, conduction strand 1 is in the both sides of air pipeline 2 vertical arrangement; Conduction strand 1 is born the conducting function of stator bar, and at the nose position, the insulating barrier that conduction strand 1 appearance of two corresponding stator bars coats is stripped from, and mutually overlaps and welds together, and forms stator winding conduction connecting path; 2 of air pipelines are born draught effect, do not participate in the conducting function of stator bar, the insulating barrier that appearance coats is peeled off in the part, an end termination that consists of whole thin-walled nonmagnetic metal square tubes 4 of air pipeline 2, link together with wire 5, form electrical connection, and be connected by the strand joint 7 of resistance 6 with upper and lower layer stator bar.
Claims (1)
1. stator winding bar nose connecting structure for electrical equipment, it is characterized in that: stator winding is made of by this connecting structure for electrical equipment the gas cooled generator stator bar, the gas cooled generator stator bar is by conduction strand (1), air pipeline (2), main insulation (3) consists of, the type of cooling of stator bar is the gas interior cooling, air pipeline (2) is positioned at the center of stator bar, thin-walled nonmagnetic metal square tube (4) vertical arrangement by appearance coated insulation layer forms, conduction strand (1) appearance coated insulation layer, online excellent straightway conduction strand (1), be arranged in air pipeline (2) around, conduction strand (1) rotates centered by air pipeline (2) and holds online excellent two ends arc, and conduction strand (1) is in the both sides vertical arrangement of air pipeline (2); Conduction strand (1) is born the conducting function of stator bar, and the insulating barrier that conduction strand (1) appearance of two corresponding stator bars coats at the nose position is stripped from, and mutually overlaps and welds together, and forms stator winding conduction connecting path; Air pipeline (2) is only born draught effect, do not participate in the conducting function of stator bar, the insulating barrier that appearance coats is peeled off in the part, an end termination that consists of whole thin-walled nonmagnetic metal square tubes (4) of air pipeline (2), link together with wire (5), form electrical connection, and be connected by the strand joint (7) of resistance (6) with upper and lower layer stator bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104548514A CN102931747A (en) | 2012-11-14 | 2012-11-14 | Electric connection structure of coil knuckle of stator winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104548514A CN102931747A (en) | 2012-11-14 | 2012-11-14 | Electric connection structure of coil knuckle of stator winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102931747A true CN102931747A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104548514A Pending CN102931747A (en) | 2012-11-14 | 2012-11-14 | Electric connection structure of coil knuckle of stator winding |
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| CN (1) | CN102931747A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661387A (en) * | 2018-06-29 | 2020-01-07 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104790A (en) * | 1985-07-16 | 1987-03-04 | 西屋电气公司 | The diagnostic system of generator unit stator winding |
| US5408152A (en) * | 1994-03-28 | 1995-04-18 | Westinghouse Electric Corporation | Method of improving heat transfer in stator coil cooling tubes |
| CN1119778A (en) * | 1994-05-16 | 1996-04-03 | 西屋电气公司 | Electrically conductive prepreg for suppressing corona discharge in high voltage devices |
-
2012
- 2012-11-14 CN CN2012104548514A patent/CN102931747A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104790A (en) * | 1985-07-16 | 1987-03-04 | 西屋电气公司 | The diagnostic system of generator unit stator winding |
| US5408152A (en) * | 1994-03-28 | 1995-04-18 | Westinghouse Electric Corporation | Method of improving heat transfer in stator coil cooling tubes |
| CN1119778A (en) * | 1994-05-16 | 1996-04-03 | 西屋电气公司 | Electrically conductive prepreg for suppressing corona discharge in high voltage devices |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661387A (en) * | 2018-06-29 | 2020-01-07 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
| CN110661387B (en) * | 2018-06-29 | 2022-04-05 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
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Application publication date: 20130213 |