CN105720745A - End part magnetic conductive structure of steam turbine generator stator - Google Patents
End part magnetic conductive structure of steam turbine generator stator Download PDFInfo
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- CN105720745A CN105720745A CN201610221438.1A CN201610221438A CN105720745A CN 105720745 A CN105720745 A CN 105720745A CN 201610221438 A CN201610221438 A CN 201610221438A CN 105720745 A CN105720745 A CN 105720745A
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Abstract
The invention discloses an end part magnetic conductive structure of a steam turbine generator stator, relates to an end part structure of the steam turbine generator stator, and aims to solve the problems of iron core wrapping, tooth losing and rupture phenomena caused by overheated edge segment iron core tooth part and thermal stress of the generator due to the overhigh saturation degree of the stator edge segment iron core tooth part of the steam turbine generator existing in the prior art. The end part magnetic conductive structure comprises stator edge segment iron cores, end part pressure fingers, multiple magnetic shielding parts, and multiple annularly-distributed bolt groups which are mounted from inside to outside in sequence, wherein stator edge segment iron core tooth part short-circuit rings are arranged on the stator teeth of the stator edge segment iron cores; magnetic shielding short-circuit rings are arranged between the adjacent magnetic shielding parts; and the magnetic shielding parts and the magnetic shielding short-circuit rings are fixedly connected with the end part pressure fingers through the bolt groups. According to the end part magnetic conductive structure, the servo effectiveness of the end part edge segment iron cores and the magnetic shielding parts can be effectively improved.
Description
Technical field
The present invention relates to turbine generator stator end structure, be specifically related to a kind of turbine generator stator end magnetic conduction construction, belong to electrical engineering technical field.
Background technology
Steam turbine generator is as the nucleus equipment of power system, its safe and stable operation is very crucial, the electric current density that stator of steam turbine generator is higher can cause the gathering of generator end leakage field, hot property and the mechanical performance of generator end structure will be directly influenced, especially, the occasion of Generation in Leading Phase Operation operating mode is required for some, when generator end synthesis leakage magnetic flux is run relatively late mutually, synthesis leakage magnetic flux in end increases, the higher axial leakage field in iron leg heart place, generator stator end limit can sense bigger eddy current in its core-lamination stack, cause limit iron leg heat in the heart amount concentrations, limit section core tooth part local deformation is caused by thermal stress, it is likely to cause the warpage of the electromotor limit iron leg heart time serious, the electromotor limit iron leg heart falls tooth and phenomenon of rupture happens occasionally, all kinds of fault of steam turbine generator and accident occupy significantly high ratio；In addition, generator end magnetic shield is mainly used in absorbing the parasitic leakage field of end regions to weaken other structures invasion degree by leakage field, generator end stator winding space structure is complicated, the complex distribution of the end space region leakage field that in stator end current－carrying conductor, electric current causes, the parasitic axially leakage field in turbo-generator end region can make the degree of saturation of magnetic shield increase so that it is the ability of absorption circumference leakage field and radially leakage field reduces.
Summary of the invention
The invention aims to solve steam turbine generator of the prior art, to there is the degree of saturation of stator limit section core tooth part too high, the warpage unshakable in one's determination causing electromotor limit section core tooth part overheated and to be caused by thermal stress, the generation falling tooth and phenomenon of rupture, the ability that generator end magnetic shield absorbs circumference leakage field and radial direction leakage field is low, makes the problem that end each magnetic conduction construction part resists the ability of axial leakage field to reduce.
The technical scheme is that a kind of turbine generator stator end magnetic conduction construction, bolt group including the distribution of the stator limit iron leg heart installed successively from inside to outside, end end finger, some magnetic shields and some annular arrays, the stator tooth of the described stator limit iron leg heart is provided with stator limit section core tooth part short-circuited conducting sleeve, it is provided with magnetic shield short-circuited conducting sleeve between adjacent two magnetic shields, described magnetic shield and magnetic shield short-circuited conducting sleeve are connected by bolt group and end end finger are fixing, and described stator limit section core tooth part short-circuited conducting sleeve and magnetic shield short-circuited conducting sleeve are high conductivity metal short-circuited conducting sleeve.
The end of described stator tooth is provided with the through hole that left and right is through, described through hole is along the circumferential direction, stator limit section core tooth part short-circuited conducting sleeve includes connecting portion and kink, described connecting portion is placed in through hole, kink is connected formation closed-loop path after the bending of stator tooth external shape with connecting portion, the suit direction of described stator limit section core tooth part short-circuited conducting sleeve is footpath-incisal plane, magnetic shield short-circuited conducting sleeve winding direction is footpath-incisal plane coiling, coiling direction is with axially vertical, namely stator limit section core tooth part short-circuited conducting sleeve opening is with axially vertical, weaken limit iron leg heart short-circuited conducting sleeve and stator tooth end described in the axial leakage magnetic flux near the iron leg heart of stator limit to fit tightly.
What stator limit section core tooth part short-circuited conducting sleeve surrounded is shaped as rectangle, is close to the sidewall of stator tooth and tooth top and teeth portion air vent during its coil winding, forms the short-circuited conducting sleeve of rectangle.
Described bolt group includes some bolts, described bolt group be shaped as polygon or circle, magnetic shield short-circuited conducting sleeve is set in the outside of bolt group, the laying direction of described magnetic shield short-circuited conducting sleeve is footpath-incisal plane, and the coiling direction of magnetic shield short-circuited conducting sleeve is footpath-incisal plane, and the coiling direction of magnetic shield short-circuited conducting sleeve is with axially vertical, namely magnetic shield short-circuited conducting sleeve opening is with axially vertical, offset axial leakage magnetic flux, reduce the magnetic saturation degree of magnetic shield, improve the footpath-tangential magnetic property of magnetic shield；
It is interconnected to constitute integral structure between adjacent two magnetic shield short-circuited conducting sleeves.
Coupling part between described adjacent two magnetic shield short-circuited conducting sleeves is polygonal annular.
Some groups of shapes are included identical and along the axial arranged magnetic shield short-circuited conducting sleeve of bolt between adjacent two magnetic shields.
Described steam turbine generator is leading phase operation electromotor, and stator limit section core tooth part short-circuited conducting sleeve is fine silver short-circuited conducting sleeve.
Described steam turbine generator is for run electromotor mutually late, and stator limit section core tooth part short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
Described magnetic shield short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
Described stator limit section core tooth part short-circuited conducting sleeve wire diameter is at 0.1 0.2 times of transverse tooth thickness.
The present invention compared with prior art has the effect that the short-circuited conducting sleeve of the turbine generator stator end limit iron leg heart and magnetic shield is effectively improved the servo effect of the end edge iron leg heart and magnetic shield, the weakening to turbo-generator end axially parasitic leakage field can be realized, avoid the stator end limit iron leg heart local electric magnetic loss that axial leakage magnetic flux causes high, heating is serious and thermal stress causes warpage and fracture, reduce the magnetic saturation degree of magnetic shield, improve the utilization ratio of magnetic shielding material, specifically facilitate brow leakage seriously interference to motor electricity-magnetic-hot property when solving Generation in Leading Phase Operation, improve generator operation Stability and dependability.On the other hand; the short-circuited conducting sleeve of the turbine generator stator end limit of the present invention iron leg heart and magnetic shield is except improving the strong property of military service of the limit iron leg heart and magnetic shield; additionally aid protection other structural members of generator end; the eddy-current loss of other hardwares near the reduction generator stator end limit iron leg heart and magnetic shield, the entirety improving generator end stator region resists the ability of axial leakage field.
Accompanying drawing explanation
Fig. 1 is the short-circuited conducting sleeve installation diagram of the turbine generator stator end limit iron leg heart and magnetic shield；
Fig. 2 is the overall structure schematic diagram of the turbine generator stator end limit iron leg heart and short-circuited conducting sleeve thereof；
Fig. 3 is turbine generator stator end limit section core tooth central through hole structural representation；
Fig. 4 is the winding structure of turbine generator stator end limit iron leg heart short-circuited conducting sleeve；
Fig. 5 is hollow stand alone type magnetic shield short-circuit ring structure schematic diagram；
Fig. 6 is the integrated form magnetic shield short-circuit ring structure schematic diagram of ring ladder type.
Detailed description of the invention
Embodiment one: a kind of turbine generator stator end magnetic conduction construction of present embodiment, as depicted in figs. 1 and 2, bolt group including the distribution of the stator limit iron leg heart 1, magnetic shield 2, stator limit section core tooth part short-circuited conducting sleeve 3, magnetic shield short-circuited conducting sleeve 4, end end finger 5 and some annular arrays, each stator tooth 6 of the stator limit iron leg heart 1 is set with stator limit section core tooth part short-circuited conducting sleeve 3, magnetic shield short-circuited conducting sleeve 4 is set between magnetic shield 2；Stator limit section core tooth part short-circuited conducting sleeve 3 adopts the metal material of high conductivity to make.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the suit direction of stator limit section core tooth part short-circuited conducting sleeve 3 is footpath-incisal plane, and stator limit section core tooth part short-circuited conducting sleeve 3 opening is with axially vertical；Stator limit section core tooth part short-circuited conducting sleeve 3 passes the stator tooth central through hole 9 right side wall 10 wraparound from stator tooth 6 from the tooth top 7 of the stator tooth 6 of the stator limit iron leg heart 1 through the left side wall 8 of stator tooth 6, form closed-loop path, axial leakage field, at stator limit section core tooth part short-circuited conducting sleeve 3 internal induction eddy current, realizes weakening the axial leakage magnetic flux near the iron leg heart of stator limit further.
Described magnetic shield short-circuited conducting sleeve, as Fig. 1, Fig. 5 and Fig. 6 are known, the laying direction of magnetic shield short-circuited conducting sleeve 4 is footpath-incisal plane, magnetic shield short-circuited conducting sleeve 4 opening is with axially vertical, described bolt group includes four bolts 11, magnetic shield short-circuited conducting sleeve 4 is sleeved between four bolts 11, bolt 11 also compressed by magnetic shield short-circuited conducting sleeve 4 while being fixed on end end finger 5 by magnetic shield 2, it is achieved fixing magnetic shield short-circuited conducting sleeve；Magnetic shield short-circuited conducting sleeve 4 is in axial direction set to 2 to 3 groups, and the shape of each group of magnetic shield short-circuited conducting sleeve 4 is identical, and the projected position that each group of magnetic shield short-circuited conducting sleeve 4 is in footpath-incisal plane is identical.
The short-circuited conducting sleeve of the described turbine generator stator end limit iron leg heart and magnetic shield, known referring to Fig. 1, when Generation in Leading Phase Operation, described stator limit section core tooth part short-circuited conducting sleeve 3 adopts fine silver material, improve stator limit section core tooth part short-circuited conducting sleeve and weaken the ability of axial leakage field, when electromotor runs late mutually, stator limit section core tooth part short-circuited conducting sleeve 3 adopts pure copper material, described magnetic shield short-circuited conducting sleeve to be that pure copper material is made.
Described stator limit section core tooth part short-circuited conducting sleeve wire diameter is at 0.1 0.2 times of transverse tooth thickness.As it is shown in figure 5, described magnetic shield short-circuited conducting sleeve is many group hollow stand alone type magnetic shield short-circuited conducting sleeve 4-1.
Embodiment two, the present embodiment and embodiment one are distinctive in that the integrated form magnetic shield short-circuited conducting sleeve 4-2 that magnetic shield short-circuited conducting sleeve is one group of ring ladder type, as shown in Figure 6.
Although disclosed embodiment is as above, but its content is only to facilitate the embodiment understanding technical scheme and adopt, is not intended to limit the present invention.Technical staff in any the technical field of the invention; under the premise without departing from disclosed core technology scheme; any amendment and change can be made in the form implemented and details; but protection defined of the present invention, still must be as the criterion with the scope that appending claims limits.
Claims (10)
1. a turbine generator stator end magnetic conduction construction, bolt group including the distribution of the stator limit iron leg heart installed successively from inside to outside, end end finger, some magnetic shields and some annular arrays, it is characterized in that: the stator tooth of the described stator limit iron leg heart is provided with stator limit section core tooth part short-circuited conducting sleeve, it is provided with magnetic shield short-circuited conducting sleeve between adjacent two magnetic shields, described magnetic shield and magnetic shield short-circuited conducting sleeve are connected by bolt group and end end finger are fixing, and described stator limit section core tooth part short-circuited conducting sleeve and magnetic shield short-circuited conducting sleeve are high conductivity metal short-circuited conducting sleeve.
2. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterized in that: the end of described stator tooth is provided with the through hole that left and right is through, stator limit section core tooth part short-circuited conducting sleeve includes connecting portion and kink, described connecting portion is placed in through hole, and kink is connected formation closed-loop path after the bending of stator tooth external shape with connecting portion.
3. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterised in that: described bolt group includes some bolts, and magnetic shield short-circuited conducting sleeve is set in the outside of bolt group.
4. a kind of turbine generator stator end magnetic conduction construction according to claim 3, it is characterised in that: it is interconnected to constitute integral structure between adjacent two magnetic shield short-circuited conducting sleeves.
5. a kind of turbine generator stator end magnetic conduction construction according to claim 4, it is characterised in that: the coupling part between described adjacent two magnetic shield short-circuited conducting sleeves is polygonal annular.
6. a kind of turbine generator stator end magnetic conduction construction according to claim 3 or claim 4, it is characterised in that: include some groups of shapes between adjacent two magnetic shields identical and along the axial arranged magnetic shield short-circuited conducting sleeve of bolt.
7. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterised in that: described steam turbine generator is leading phase operation electromotor, and stator limit section core tooth part short-circuited conducting sleeve is fine silver short-circuited conducting sleeve.
8. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterised in that: described steam turbine generator is for run electromotor mutually late, and stator limit section core tooth part short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
9. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterised in that: described magnetic shield short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
10. a kind of turbine generator stator end magnetic conduction construction according to claim 1, it is characterised in that: described stator limit section core tooth part short-circuited conducting sleeve wire diameter is 0.1 0.2 times of stator tooth transverse tooth thickness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610221438.1A CN105720745B (en) | 2016-04-11 | 2016-04-11 | A kind of turbine generator stator end magnetic conduction construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610221438.1A CN105720745B (en) | 2016-04-11 | 2016-04-11 | A kind of turbine generator stator end magnetic conduction construction |
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| CN105720745A true CN105720745A (en) | 2016-06-29 |
| CN105720745B CN105720745B (en) | 2018-04-03 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104813A (en) * | 1980-12-20 | 1982-06-30 | Fuji Electric Co Ltd | Displacement-electricity converter |
| CN102447320A (en) * | 2010-10-08 | 2012-05-09 | 株式会社电装 | Electric rotating machine |
| CN102997037A (en) * | 2011-09-19 | 2013-03-27 | 北京云电英纳超导电缆有限公司 | Dewar with magnetic shielding or electromagnetic shielding |
| CN103151858A (en) * | 2013-03-25 | 2013-06-12 | 哈尔滨电机厂有限责任公司 | Large-scale nuclear power half-speed steam turbine power generator |
| CN104821675A (en) * | 2015-04-29 | 2015-08-05 | 哈尔滨理工大学 | Non-salient pole motor end part magnetic shielding device capable of enhancing cooling effect |
| CN105186790A (en) * | 2015-09-24 | 2015-12-23 | 哈尔滨理工大学 | Steam turbine generator end part axial-radial-tangential multi-directional magnetic leakage evacuation magnetic shielding device |
-
2016
- 2016-04-11 CN CN201610221438.1A patent/CN105720745B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104813A (en) * | 1980-12-20 | 1982-06-30 | Fuji Electric Co Ltd | Displacement-electricity converter |
| CN102447320A (en) * | 2010-10-08 | 2012-05-09 | 株式会社电装 | Electric rotating machine |
| CN102997037A (en) * | 2011-09-19 | 2013-03-27 | 北京云电英纳超导电缆有限公司 | Dewar with magnetic shielding or electromagnetic shielding |
| CN103151858A (en) * | 2013-03-25 | 2013-06-12 | 哈尔滨电机厂有限责任公司 | Large-scale nuclear power half-speed steam turbine power generator |
| CN104821675A (en) * | 2015-04-29 | 2015-08-05 | 哈尔滨理工大学 | Non-salient pole motor end part magnetic shielding device capable of enhancing cooling effect |
| CN105186790A (en) * | 2015-09-24 | 2015-12-23 | 哈尔滨理工大学 | Steam turbine generator end part axial-radial-tangential multi-directional magnetic leakage evacuation magnetic shielding device |
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| CN105720745B (en) | 2018-04-03 |
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Inventor after: Wang Likun Inventor after: Kou Baoquan Inventor after: Sun Yutian Inventor after: Ge Baojun Inventor after: Guo Qingbo Inventor before: Wang Likun Inventor before: Lv Yanling Inventor before: Tao Dajun Inventor before: Ge Baojun Inventor before: Chen Wen |
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Granted publication date: 20180403 Termination date: 20190411 |