CN1081289C - 燃气轮机的定子叶片 - Google Patents

燃气轮机的定子叶片 Download PDF

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Publication number
CN1081289C
CN1081289C CN96192413A CN96192413A CN1081289C CN 1081289 C CN1081289 C CN 1081289C CN 96192413 A CN96192413 A CN 96192413A CN 96192413 A CN96192413 A CN 96192413A CN 1081289 C CN1081289 C CN 1081289C
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China
Prior art keywords
cooled
gas turbine
pipe box
cooling
blade part
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Expired - Fee Related
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CN96192413A
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CN1177994A (zh
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松浦正昭
末永洁
上松一雄
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Publication of CN1177994A publication Critical patent/CN1177994A/zh
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    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
    • F01D5/187—Convection cooling
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
    • F01D5/182—Transpiration cooling
    • 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
    • F05D2240/80—Platforms for stationary or moving blades
    • F05D2240/81—Cooled platforms
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/205—Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium
    • F05D2260/2322—Heat transfer, e.g. cooling characterized by the cooling medium steam

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

本发明提供一种能进行充分冷却、而且在降低冷却蒸气的压力损失前提下、能用简单的结构防止燃气轮机效率降低的燃气轮机的定子叶片。它是用蒸气冷却燃气轮机的外侧管套(3)和叶片部(2)、将其通路形状简化来防止压力损失，内侧管套(4)是由从别的系统输出的空气进行冷却。

Description

燃气轮机的定子叶片
〔技术领域〕
本发明涉及燃气轮机的定子叶片，它以简单的结构、能不损失冷却蒸气的压力地进行冷却。
〔背景技术〕
近年来、为了得到高输出、高效率，力图提高工业用燃气轮机的气轮机入口气体温度，预计将达到1500℃。为此出现了一种将冷却效果高的水蒸气流到内部来冷却燃气轮机的定子叶片的方案。图3和图4表示现有的蒸气冷却的燃气轮机定子叶片的冷却结构。如箭头所示、冷却蒸气从外侧管套3的冷却蒸气入口5供给，通过设有多个细孔的撞击板13后，通过叶片部2内的向内冷却通路7而冷却叶面，通过设置在内侧管套4a里的带散热片的内部冷却通路9、对内侧管套4a进行冷却之后，再次通过叶片部2内的向外通路8，从外侧管套3的冷却蒸气出口6排出到叶片外，并且全量被回收。
如图3和图4所示，上述现有的蒸气冷却的燃气轮机定子叶片结构中、使冷却蒸气在叶片部内从向内通路流向向外通路的内侧管套的冷却通路形状较复杂、造成制造方面的技术难度、使成本增高。而且，由于冷却蒸气通过内侧管套的狭窄部分时的压力损失加大，因而会造成燃气轮机效率降低。
〔发明的目的和方案〕
本发明的目的是提供一种能解决现有技术存在的问题的燃气轮机的定子叶片。
本发明的燃气轮机的定子叶片，其特征在于：外侧管套和叶片部由蒸气冷却，内侧管套由空气冷却。
在本发明中，由于用蒸气冷却外侧管套和叶片部，内侧管套由另外系统输来的空气冷却，因而能有效地冷却管套和叶片部。又因为冷却蒸气从向内冷却通路朝向外冷却通路改变方向地流动，不通过内侧管套，所以蒸气流过的冷却通路的形状就较简单，用较低的压力损失和单一的回流通路就能完成叶片部和外侧管套的冷却。
〔附图的简单说明〕
图1是表示本发明一个实施例的燃气轮机定子叶片的纵断面图。
图2是沿图1的A-A线取得的断面图。
图3是表示现有的蒸气冷却燃气轮机定子叶片的纵断面图。
图4是沿图3的B-B线取得的断面图。
〔实施发明的最佳方式〕
下面，参照图1和图2说明本发明的实施方式。本实施方式中的外侧管套3和叶片部2的由蒸气冷却的结构大致上与图3和图4所示的现有技术相同，即、由冷却蒸气入口5供到外侧管套3里的冷却蒸气如下所述地冷却了外侧管套3和叶片部2后，从冷却蒸气出口6排出到叶片外，并且全量被回收。但是、在本实施方式中，在内侧管套4部分、冷却蒸气的通路被做成单一的回路型，即、只单纯地从叶片部2内的向内通路7朝向外通路8改变方向。在内侧管套4里不设置如图3和图4所示的带散热片的内部通路9，不将冷却蒸气导入内侧管套4。
通过另外途径从燃烧用空气中抽取部分空气、并将其从内侧的冷却空气入口11向内侧管套4供给来进行内侧管套4的冷却。供给的冷却空气通过撞击板10后吹到内侧管套的内表面，冷却管套的金属。该撞击板10上设置多个细孔，该多个细孔沿半径方向将内侧管套4内划分成冷却空气入口侧11和薄膜冷却孔侧12。而且在内侧管套4的面上开设多个薄膜冷却孔12，把冷却过上述内侧管套4的金属的冷却空气从冷却孔12吹入到主流燃气1中，用低温的空气遮蔽高温燃气对内侧管套4的管套面作用，进行薄膜冷却。
由于本实施方式具有上述的结构，因而内侧管套4上用极少量的空气就能达到预定的冷却效果。又因为冷却叶片部2的蒸气只流过设置在叶片部2内的单一的回路型通路，所以能把蒸气流的压力损失减低到最小限度。
〔产业上的可利用性〕
如上所述，由于本发明采用只对内侧管套进行空气冷却的蒸气冷却定子叶片，因而解决了冷却结构复杂的问题，并能减少冷却蒸气的压力损失。由此能在不影响预定冷却效果前提下防止燃气轮机效率的降低，而且能降低制造成本。

Claims (2)

1.一种燃气轮机的定子叶片，其特征在于：外侧管套和叶片部由蒸气进行冷却，内侧管套由空气进行冷却。
2.如权利要求1所述的燃气轮机的定子叶片，其特征在于：它具有设置在叶片部内、从外侧管套的冷却蒸气入口供给的冷却蒸气通过的向内冷却通路、和设置在叶片部内、改变从上述向内冷却通路输出的冷却蒸气的方向、不通过内侧管套地将冷却蒸气朝外侧管套的冷却蒸气出口导引的向外冷却通路。
CN96192413A 1996-01-08 1996-12-19 燃气轮机的定子叶片 Expired - Fee Related CN1081289C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP749/96 1996-01-08
JP8000749A JP2971386B2 (ja) 1996-01-08 1996-01-08 ガスタービン静翼

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CN1177994A CN1177994A (zh) 1998-04-01
CN1081289C true CN1081289C (zh) 2002-03-20

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US (1) US5954475A (zh)
EP (1) EP0814234B1 (zh)
JP (1) JP2971386B2 (zh)
KR (1) KR100264182B1 (zh)
CN (1) CN1081289C (zh)
CA (1) CA2214826C (zh)
DE (1) DE69622160T2 (zh)
WO (1) WO1997025522A1 (zh)

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US9771816B2 (en) 2014-05-07 2017-09-26 General Electric Company Blade cooling circuit feed duct, exhaust duct, and related cooling structure
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Also Published As

Publication number Publication date
JPH09189203A (ja) 1997-07-22
KR100264182B1 (ko) 2000-08-16
WO1997025522A1 (fr) 1997-07-17
CA2214826A1 (en) 1997-07-17
DE69622160T2 (de) 2003-01-23
EP0814234A4 (en) 1999-03-24
JP2971386B2 (ja) 1999-11-02
DE69622160D1 (de) 2002-08-08
CN1177994A (zh) 1998-04-01
CA2214826C (en) 2000-09-12
EP0814234A1 (en) 1997-12-29
EP0814234B1 (en) 2002-07-03
US5954475A (en) 1999-09-21
KR19980702822A (ko) 1998-08-05

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