CN109356669A - The arc of impulse turbine divides whole stator blade - Google Patents
The arc of impulse turbine divides whole stator blade Download PDFInfo
- Publication number
- CN109356669A CN109356669A CN201811221218.4A CN201811221218A CN109356669A CN 109356669 A CN109356669 A CN 109356669A CN 201811221218 A CN201811221218 A CN 201811221218A CN 109356669 A CN109356669 A CN 109356669A
- Authority
- CN
- China
- Prior art keywords
- divisional plane
- stator blade
- interior
- intrados
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003801 milling Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 2
- 229910003460 diamond Inorganic materials 0.000 description 11
- 239000010432 diamond Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
Abstract
A kind of arc for impulse turbine that the present invention designs divides whole stator blade, including stator blade main body, the stator blade main body includes blade root, the intrados of molded line part and extrados, shroud, interior divisional plane and outer divisional plane, the intrados is overlapped with interior divisional plane, and the intrados end is extended with extended line, in the entirety that connects into of divisional plane and extended line it is C-shaped.The characteristics of this structure is: the interior divisional plane includes extended line using molding disc type milling cutter, is formed along the high direction feed milling of leaf.The extrados is formed using ordinary disc-type milling cutter along back arc lines feed milling.The outer divisional plane, angle is equal between interior divisional plane underlay tooling block, tooling block tilt angle and the single inside and outside divisional plane of leaf, using ordinary disc-type milling cutter, forms along outer divisional plane feed milling.
Description
Technical field
The present invention relates to turbine blade fields, and in particular to a kind of whole stator blade of arc segmentation of impulse turbine.
Background technique
As shown in Figure 1, being the flow passage component sectional side elevation of steam turbine, if being along the circumferential direction equipped in the annular groove of support ring body
Dry stator blade, is along the circumferential direction equipped with several movable vanes in the annular groove of shaft.Support ring body and stator blade are stationary, shaft with
Movable vane along the circumferential direction rotates.As shown in Fig. 2, be the diamond shape stator blade of reaction turbine and the cross-sectional view of Blade Profile part,
Stator blade is the blade root of diamond shape segmentation, blade profile, the three-in-one whole stator blade of shroud, single diamond shape stator blade three-dimensional figure of reaction turbine
As shown in figure 3, dicing α is greater than 60 °.As shown in figure 4, being the diamond shape stator blade of impulse turbine and cuing open for Blade Profile part
The stator blade molded line of view, impulse is longer than reactionary style, and inclination angle is small, and single diamond shape stator blade three-dimensional figure of impulse turbine is such as
Shown in Fig. 5, in order not to switch to trailing edge and back arc, for dicing β less than 45 °, this will cause two problems: when 1, assembling stator blade, by
In wedge effect, the stator blade loaded can be irregular, as shown in fig. 6, influencing the dynamic and static gaps D between stator blade and movable vane, occurs
Sound wiping is touched；It misplaces at adjacent stator blade docking, as shown in fig. 7, the step that the dislocation of steam passage upper and lower surface generates can be upset
The flowing of water vapour, caused by secondary flow loss account for 90% or more of stator blade flow losses.
Summary of the invention
The purpose of the present invention is to provide a kind of arcs of impulse turbine that Secondary Flow loss rate is low to divide whole stator blade.
To achieve the goals above, a kind of arc for impulse turbine that the present invention designs divides whole stator blade, including
Stator blade main body, the stator blade main body include blade root, the intrados of molded line part and extrados, shroud, interior divisional plane and outer segmentation
Face, the intrados are overlapped with interior divisional plane, and the intrados end is extended with extended line, and divisional plane and extended line connect in institute
The entirety being connected into is C-shaped.The characteristics of this structure is: the interior divisional plane includes extended line using molding disc type milling cutter, edge
The high direction feed milling of leaf forms.The extrados is formed using ordinary disc-type milling cutter along back arc lines feed milling.It is described
Outer divisional plane, angle is equal between interior divisional plane underlay tooling block, tooling block tilt angle and the single inside and outside divisional plane of leaf,
Using ordinary disc-type milling cutter, formed along outer divisional plane feed milling.
Further embodiment is that the outer divisional plane is identical as interior divisional plane shape, and in the end of extrados is connected to
The junction of cambered surface and extended line.
Further scheme is, the angle between the interior divisional plane and outer divisional plane is equal to 360 °/whole circle stator blade
Number.
The beneficial effects of the present invention are: the wedge effect that the inner arc extended line contact surface generates, with inner arc face contact
The wedge effect that face generates is cancelled out each other, and the stator blade lagging edge loaded is concordant, ensure that the dynamic and static gaps between stator blade and movable vane
Uniformly；Interior divisional plane is overlapped with molded line intrados, and the upper and lower surface of steam passage is made of a stator blade, and runner is smooth, by steam passage wall
Secondary flow loss caused by face accounts for the 30 ~ 40% of stator blade flow losses.
Detailed description of the invention
Fig. 1 is the flow passage component sectional side elevation of steam turbine.
Fig. 2 is the diamond shape stator blade and Blade Profile partial sectional view of reaction turbine.
Fig. 3 is single diamond shape stator blade schematic diagram of reaction turbine.
Fig. 4 is the diamond shape stator blade and Blade Profile partial sectional view of impulse turbine.
Fig. 5 is single diamond shape stator blade schematic diagram of impulse turbine.
Fig. 6 is the diamond shape stator blade and Blade Profile partial sectional view of the impulse turbine after assembly.
Fig. 7 is the diamond shape entirety stator blade schematic diagram of the impulse turbine after assembly.
Fig. 8 is single arc stator blade schematic diagram of impulse turbine.
Fig. 9 is the arc entirety stator blade schematic diagram of the impulse turbine after assembly.
Figure 10 is the arc stator blade and Blade Profile partial sectional view of the impulse turbine after assembly.
Specific embodiment
The present invention is further detailed with reference to embodiments:
Embodiment 1:
As shown in Figures 8 to 10, a kind of arc of impulse turbine of the invention divides whole stator blade, including stator blade main body,
It is characterized in that the stator blade main body includes blade root 1, the intrados 2 of molded line part and extrados 3, shroud 4, interior divisional plane 5 and divides outside
Face 6, the intrados 2 are overlapped with interior divisional plane 5, and 2 end of the intrados is extended with extended line 7,5 He of divisional plane in institute
The entirety that extended line 7 connects into is C-shaped.The outer divisional plane 6 is identical as interior 5 shape of divisional plane, and the end connection of extrados 3
In the junction of intrados 2 and extended line 7.Angle between the interior divisional plane 5 and outer divisional plane 6 is equal to 360 °/whole circle
Stator blade number.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail.It should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope.All within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (3)
1. a kind of arc of impulse turbine divides whole stator blade, including stator blade main body, it is characterized in that the stator blade main body packet
Include blade root (1), the intrados (2) of molded line part and extrados (3), shroud (4), interior divisional plane (5) and outer divisional plane (6), institute
It states intrados (2) to be overlapped with interior divisional plane (5), and the intrados (2) end is extended with extended line (7), divisional plane (5) in institute
The entirety connected into extended line (7) is C-shaped.
2. a kind of arc of impulse turbine according to claim 1 divides whole stator blade, it is characterized in that described outer point
Face (6) is identical as interior divisional plane (5) shape, and the end of extrados (3) is connected to the company of intrados (2) Yu extended line (7)
Meet place.
3. a kind of arc of impulse turbine according to claim 1 divides whole stator blade, it is characterized in that described is interior
Angle between divisional plane (5) and outer divisional plane (6) is equal to 360 °/whole circle stator blade number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221218.4A CN109356669A (en) | 2018-10-19 | 2018-10-19 | The arc of impulse turbine divides whole stator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221218.4A CN109356669A (en) | 2018-10-19 | 2018-10-19 | The arc of impulse turbine divides whole stator blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109356669A true CN109356669A (en) | 2019-02-19 |
Family
ID=65345957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811221218.4A Pending CN109356669A (en) | 2018-10-19 | 2018-10-19 | The arc of impulse turbine divides whole stator blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109356669A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861007A (en) * | 1994-08-16 | 1996-03-05 | Mitsubishi Heavy Ind Ltd | Stator blade device for steam turbine |
| CN2675867Y (en) * | 2003-09-29 | 2005-02-02 | 上海汽轮机有限公司 | Stationary integral blade separator of impulse steam turbine |
| CN101403320A (en) * | 2001-07-19 | 2009-04-08 | 株式会社东芝 | Assembly type nozzle diaphragm |
| JP2014163367A (en) * | 2013-02-28 | 2014-09-08 | Hitachi Ltd | Rotor blade row of axial-flow turbine, and axial-flow turbine |
| CN204609953U (en) * | 2015-05-11 | 2015-09-02 | 北京全四维动力科技有限公司 | A kind of impulse carries shroud circular cone end wall bending stator blade |
| CN207177979U (en) * | 2017-09-13 | 2018-04-03 | 杭州亘元汽轮机叶片有限公司 | Steam turbine monoblock type magnet ring stator blade |
| CN209083340U (en) * | 2018-10-19 | 2019-07-09 | 杭州中能汽轮动力有限公司 | The arc of impulse turbine divides whole stator blade |
-
2018
- 2018-10-19 CN CN201811221218.4A patent/CN109356669A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861007A (en) * | 1994-08-16 | 1996-03-05 | Mitsubishi Heavy Ind Ltd | Stator blade device for steam turbine |
| CN101403320A (en) * | 2001-07-19 | 2009-04-08 | 株式会社东芝 | Assembly type nozzle diaphragm |
| CN2675867Y (en) * | 2003-09-29 | 2005-02-02 | 上海汽轮机有限公司 | Stationary integral blade separator of impulse steam turbine |
| JP2014163367A (en) * | 2013-02-28 | 2014-09-08 | Hitachi Ltd | Rotor blade row of axial-flow turbine, and axial-flow turbine |
| CN204609953U (en) * | 2015-05-11 | 2015-09-02 | 北京全四维动力科技有限公司 | A kind of impulse carries shroud circular cone end wall bending stator blade |
| CN207177979U (en) * | 2017-09-13 | 2018-04-03 | 杭州亘元汽轮机叶片有限公司 | Steam turbine monoblock type magnet ring stator blade |
| CN209083340U (en) * | 2018-10-19 | 2019-07-09 | 杭州中能汽轮动力有限公司 | The arc of impulse turbine divides whole stator blade |
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