CN105720745B - A kind of turbine generator stator end magnetic conduction construction - Google Patents
A kind of turbine generator stator end magnetic conduction construction Download PDFInfo
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- CN105720745B CN105720745B CN201610221438.1A CN201610221438A CN105720745B CN 105720745 B CN105720745 B CN 105720745B CN 201610221438 A CN201610221438 A CN 201610221438A CN 105720745 B CN105720745 B CN 105720745B
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- circuited conducting
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Abstract
A kind of turbine generator stator end magnetic conduction construction, it is related to a kind of turbine generator stator end structure.The invention aims to solve steam turbine generator of the prior art exist stator side section core tooth part degree of saturation it is too high, cause generator side section core tooth part overheat and by the problem of warpage unshakable in one's determination, fall tooth and phenomenon of rupture are occurred caused by thermal stress.The present invention include install successively from inside to outside the stator side iron leg heart, end pressure refer to, some magnetic screens and some annular arrays distribution bolt group, stator section core tooth part short-circuited conducting sleeve when being provided with stator on the stator tooth of the iron leg heart, magnetic screen short-circuited conducting sleeve, magnetic screen and magnetic screen short-circuited conducting sleeve are provided between adjacent two magnetic screen are referred to by bolt group and end pressure and is fixedly connected.The effective servo effect for improving the end edge iron leg heart and magnetic screen of the invention.
Description
Technical field
The present invention relates to turbine generator stator end structure, and in particular to a kind of turbine generator stator end magnetic conduction knot
Structure, belong to electrical engineering technical field.
Background technology
Nucleus equipment of the steam turbine generator as power system, its safe and stable operation is very crucial, and steam turbine generator is fixed
The higher current density of son can cause the aggregation of generator end leakage field, will directly influence the hot property of generator end structure
With mechanical performance, especially, for some occasions for requiring Generation in Leading Phase Operation operating mode, generator end synthesize leakage magnetic flux compared with
End synthesis leakage magnetic flux increases when mutually running late, and axial direction leakage field can be unshakable in one's determination at it at the higher generator stator end side iron leg heart
Larger vortex is sensed in lamination, causes side iron leg heart excess calories to be concentrated, causes side section core tooth part locally to become by thermal stress
Shape, the warpage of the generator side iron leg heart may be caused when serious, generator side iron leg heart fall tooth and phenomenon of rupture happen occasionally,
Occupy very high ratio in all kinds of failures of steam turbine generator and accident；In addition, generator end magnetic screen is mainly used in absorption edge
Portion region parasitic leakage field weakens invasion degree of the other structures by leakage field, and generator end stator winding space structure is answered
It is miscellaneous, the complex distribution of end space region leakage field caused by electric current, turbo-generator end region in stator end current－carrying conductor
Parasitic axial leakage field can increase the degree of saturation of magnetic screen, and it is absorbed the ability of circumferential leakage field and radial direction leakage field reduces.
The content of the invention
The invention aims to solve steam turbine generator of the prior art to have the full of stator side section core tooth part
It is too high with degree, cause generator side section core tooth part overheat and showed by warpage unshakable in one's determination, fall tooth and fracture caused by thermal stress
The generation of elephant, the ability that generator end magnetic screen absorbs circumferential leakage field and radial direction leakage field is low, resists each magnetic conduction construction part in end
The problem of ability of axial leakage field reduces.
The technical scheme is that：A kind of turbine generator stator end magnetic conduction construction, including pacify successively from inside to outside
The stator side iron leg heart of dress, end pressure refer to, the bolt group of some magnetic screens and some annular arrays distribution, stator side iron leg
The stator tooth of the heart is provided with stator side section core tooth part short-circuited conducting sleeve, and magnetic screen short-circuited conducting sleeve is provided between adjacent two magnetic screen, described
Magnetic screen and magnetic screen short-circuited conducting sleeve are referred to by bolt group with end pressure to be fixedly connected, the stator side section core tooth part short-circuited conducting sleeve and
Magnetic screen short-circuited conducting sleeve is high conductivity metal short-circuited conducting sleeve.
The end of the stator tooth be provided with left and right insertion through hole, the through hole along the circumferential direction, stator side section core tooth
Portion's short-circuited conducting sleeve includes connecting portion and kink, and the connecting portion is placed in through hole, after kink is bent along stator tooth outer shape
It is connected to form closed-loop path with connecting portion, the suit direction of described stator side section core tooth part short-circuited conducting sleeve is footpath-section, magnetic
Short-circuited conducting sleeve winding direction is shielded as footpath-section coiling, coiling direction is with axially vertical, i.e. stator side section core tooth part short circuit
Ring opening with it is axially vertical, weaken iron leg heart short-circuited conducting sleeve and stator increment when described in axial leakage magnetic flux of the stator near the iron leg heart
Portion is brought into close contact.
What stator side section core tooth part short-circuited conducting sleeve surrounded is shaped as rectangle, be close to during its coil winding stator tooth side wall and
Tooth top and teeth portion air vent, form the short-circuited conducting sleeve of rectangle.
If the bolt group includes bolt stem, the bolt group is shaped as polygon or circle, magnetic screen short circuit ring set
It is located at the outside of bolt group, the laying direction of described magnetic screen short-circuited conducting sleeve is footpath-section, the coiling side of magnetic screen short-circuited conducting sleeve
To for footpath-section, the coiling direction of magnetic screen short-circuited conducting sleeve with axially vertical, i.e. magnetic screen short-circuited conducting sleeve opening with axially vertical,
To offset axial leakage magnetic flux, the magnetic saturation degree of magnetic screen is reduced, improves footpath-tangential magnetic property of magnetic screen；
Integral structure is interconnected to constitute between adjacent two magnetic screens short-circuited conducting sleeve.
Coupling part between the adjacent two magnetic screens short-circuited conducting sleeve is in polygonal annular.
It is identical and along the axial arranged magnetic screen short-circuited conducting sleeve of bolt to include some groups of shapes between adjacent two magnetic screen.
The steam turbine generator is leading phase operation generator, and stator side section core tooth part short-circuited conducting sleeve is fine silver short-circuited conducting sleeve.
For the steam turbine generator mutually to run generator late, stator side section core tooth part short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
The magnetic screen short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
0.1-0.2 times in transverse tooth thickness of the stator side section core tooth part short-circuited conducting sleeve line footpath.
The present invention has the following effects that compared with prior art：The turbine generator stator end side iron leg heart and magnetic screen
Short-circuited conducting sleeve effectively improves the servo effect of the end edge iron leg heart and magnetic screen, can be achieved to turbo-generator end axial direction parasitic drain
The weakening of magnetic, avoid stator end side iron leg heart part electromagnetic consumable caused by axial leakage magnetic flux high, serious and thermal stress of generating heat
Caused warpage and fracture, reduce the magnetic saturation degree of magnetic screen, improve the utilization ratio of magnetic shielding material, specifically facilitate
Solve the brow leakage seriously interference to motor electricity-magnetic-hot property during Generation in Leading Phase Operation, improve generator operation stability
With reliability.On the other hand, the turbine generator stator end side iron leg heart of the present invention and the short-circuited conducting sleeve of magnetic screen except
The strong property of military service of the side iron leg heart and magnetic screen can be improved, protection generator end other structures part is additionally aided, reduces hair
The eddy-current loss of the motor stator end edge iron leg heart and other hardwares near magnetic screen, improve generator end stator
The entirety in region resists the ability of axial leakage field.
Brief description of the drawings
Fig. 1 is the turbine generator stator end side iron leg heart and the short-circuited conducting sleeve installation diagram of magnetic screen；
Fig. 2 is the overall structure diagram of the turbine generator stator end side iron leg heart and its short-circuited conducting sleeve；
Fig. 3 is turbine generator stator end side section core tooth central through hole structural representation；
Fig. 4 is the winding structure of turbine generator stator end side iron leg heart short-circuited conducting sleeve；
Fig. 5 is hollow stand alone type magnetic screen short-circuit ring structure schematic diagram；
Fig. 6 is the integrated form magnetic screen short-circuit ring structure schematic diagram of ring ladder type.
Embodiment
Embodiment one：A kind of turbine generator stator end magnetic conduction construction of present embodiment, as depicted in figs. 1 and 2, bag
Include stator section core tooth part short-circuited conducting sleeve 3, magnetic screen short-circuited conducting sleeve 4, end pressure in the iron leg heart 1, magnetic screen 2, stator and refer to 5 and some
The bolt group of annular array distribution, stator section core tooth part short-circuited conducting sleeve when being set with stator on each stator tooth 6 of the iron leg heart 1
3, magnetic screen short-circuited conducting sleeve 4 is set between magnetic screen 2；Stator side section core tooth part short-circuited conducting sleeve 3 uses the metal material of high conductivity
It is made.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the suit direction of stator side section core tooth part short-circuited conducting sleeve 3 is footpath-section, fixed
Sub- side section core tooth part short-circuited conducting sleeve 3 opening with it is axially vertical；Stator iron leg heart 1 when section core tooth part short-circuited conducting sleeve 3 is from stator
At the tooth top 7 of stator tooth 6 by stator tooth 6 left side wall 8 through stator tooth central through hole 9 from the right side wall 10 of stator tooth 6 around
Return, form closed-loop path, axial leakage field inductive loop in stator side section core tooth part short-circuited conducting sleeve 3, further realize that weakening is fixed
Axial leakage magnetic flux near the sub- side iron leg heart.
Described magnetic screen short-circuited conducting sleeve, as Fig. 1, Fig. 5 and Fig. 6 are understood, the laying direction of magnetic screen short-circuited conducting sleeve 4 is footpath-cut
Plane, the opening of magnetic screen short-circuited conducting sleeve 4 is with axially vertical, and the bolt group includes four bolts 11, and magnetic screen short-circuited conducting sleeve 4 is sleeved on
Between four bolt 11, magnetic screen 2 is fixed on while end pressure refers on 5 by bolt 11 and also compressed magnetic screen short-circuited conducting sleeve 4,
Realize the fixation to magnetic screen short-circuited conducting sleeve；Magnetic screen short-circuited conducting sleeve 4 is in axial direction arranged to 2 to 3 groups, each group of magnetic screen short circuit
The shape of ring 4 is identical, and projected position of each group of magnetic screen short-circuited conducting sleeve 4 in footpath-section is identical.
The described turbine generator stator end side iron leg heart and the short-circuited conducting sleeve of magnetic screen, it can be seen from Fig. 1, work as generator
During leading phase operation, the stator side section core tooth part short-circuited conducting sleeve 3 uses fine silver material, improves stator side section core tooth part short-circuited conducting sleeve
Weaken the ability of axial leakage field, when generator is mutually run late, stator side section core tooth part short-circuited conducting sleeve 3 uses pure copper material, institute
Magnetic screen short-circuited conducting sleeve is stated to be made up of pure copper material.
0.1-0.2 times in transverse tooth thickness of the stator side section core tooth part short-circuited conducting sleeve line footpath.As shown in figure 5, the magnetic screen
Short-circuited conducting sleeve is multigroup hollow stand alone type magnetic screen short-circuited conducting sleeve 4-1.
The difference of embodiment two, the present embodiment and embodiment one is integrated form of the magnetic screen short-circuited conducting sleeve for one group of ring ladder type
Magnetic screen short-circuited conducting sleeve 4-2, as shown in Figure 6.
Although disclosed embodiment is as above, its content is only to facilitate understand the technical side of the present invention
Case and the embodiment used, are not intended to limit the present invention.Any those skilled in the art to which this invention pertains, not
On the premise of departing from disclosed core technology scheme, any modification can be made in the form and details of implementation and is become
Change, but the protection domain that the present invention is limited, the scope that must be still limited by appended claims are defined.
Claims (9)
1. a kind of turbine generator stator end magnetic conduction construction, including install successively from inside to outside the stator side iron leg heart, end
Pressure refers to, the bolt group of some magnetic screens and some annular arrays distribution, it is characterised in that：The stator tooth of the stator side iron leg heart
Stator side section core tooth part short-circuited conducting sleeve is provided with, magnetic screen short-circuited conducting sleeve, the magnetic screen and magnetic are provided between adjacent two magnetic screen
Shielding short-circuited conducting sleeve is referred to by bolt group with end pressure to be fixedly connected, the stator side section core tooth part short-circuited conducting sleeve and magnetic screen short circuit
Ring is high conductivity metal short-circuited conducting sleeve,
The end of the stator tooth is provided with the through hole of left and right insertion, and stator side section core tooth part short-circuited conducting sleeve includes connecting portion and bending
Portion, the connecting portion are placed in through hole, and kink is connected to form closed-loop path after bending along stator tooth outer shape with connecting portion,
The suit direction of described stator side section core tooth part short-circuited conducting sleeve is footpath-section, and magnetic screen short-circuited conducting sleeve winding direction is footpath-cut
Plane coiling.
2. a kind of 1 turbine generator stator end magnetic conduction construction is wanted according to right, it is characterised in that：The bolt group includes
If bolt stem, magnetic screen short-circuited conducting sleeve is set in the outside of bolt group.
3. a kind of 2 turbine generator stator end magnetic conduction constructions are wanted according to right, it is characterised in that：Adjacent two magnetic screen is short
Integral structure is interconnected to constitute between the ring of road.
4. a kind of 3 turbine generator stator end magnetic conduction constructions are wanted according to right, it is characterised in that：Adjacent two magnetic cup
It is in polygonal annular to cover the coupling part between short-circuited conducting sleeve.
A kind of 5. turbine generator stator end magnetic conduction construction according to right wants 2 or claim 3, it is characterised in that：Phase
It is identical and along the axial arranged magnetic screen short-circuited conducting sleeve of bolt to include some groups of shapes between adjacent two magnetic screens.
6. a kind of 1 turbine generator stator end magnetic conduction construction is wanted according to right, it is characterised in that：The steam turbine generator
For leading phase operation generator, stator side section core tooth part short-circuited conducting sleeve is fine silver short-circuited conducting sleeve.
7. a kind of 1 turbine generator stator end magnetic conduction construction is wanted according to right, it is characterised in that：The steam turbine generator
Mutually to run generator late, stator side section core tooth part short-circuited conducting sleeve is fine copper short-circuited conducting sleeve.
8. a kind of 1 turbine generator stator end magnetic conduction construction is wanted according to right, it is characterised in that：The magnetic screen short circuit
Ring is fine copper short-circuited conducting sleeve.
9. a kind of 1 turbine generator stator end magnetic conduction construction is wanted according to right, it is characterised in that：Stator side iron leg
Heart teeth portion short-circuited conducting sleeve line footpath is 0.1-0.2 times of stator tooth transverse tooth thickness.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN105720745A CN105720745A (en) | 2016-06-29 |
| CN105720745B true CN105720745B (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610221438.1A Expired - Fee Related CN105720745B (en) | 2016-04-11 | 2016-04-11 | A kind of turbine generator stator end magnetic conduction construction |
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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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| CN105720745A (en) | 2016-06-29 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
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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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 Termination date: 20190411 |