CN101113676A - 低应力涡轮机叶片 - Google Patents
低应力涡轮机叶片 Download PDFInfo
- Publication number
- CN101113676A CN101113676A CN200710136997.3A CN200710136997A CN101113676A CN 101113676 A CN101113676 A CN 101113676A CN 200710136997 A CN200710136997 A CN 200710136997A CN 101113676 A CN101113676 A CN 101113676A
- Authority
- CN
- China
- Prior art keywords
- turbine bucket
- cross
- casting core
- section
- core
- 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
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- 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
- F01D5/186—Film 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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/21—Manufacture essentially without removing material by casting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/49336—Blade making
- Y10T29/49339—Hollow blade
- Y10T29/49341—Hollow blade with cooling passage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
一种减小涡轮机叶片(10)中应力的方法,所述涡轮机叶片(10)具有由铸造型芯(22)形成的内部冷却回路,所述铸造型芯(22)包括具有方形或矩形横截面的横向延伸支撑销(36,38),所述方法包括:(a)重新设计所述支撑销以使其具有圆形横截面;或者(b)去除相邻冷却通路之间的跨接孔(50,52)。
Description
技术领域
本发明大致涉及涡轮机技术,具体涉及在第一级及第二级叶片中具有内部冷却回路的叶片或浆叶。
背景技术
制造的某些涡轮机叶片或浆叶具有内部蜿蜒状冷却回路,该冷却回路具有邻近翼面部的径向内端部的空气入口,用于将冷却空气供应至多个径向冷却通路,该多个径向冷却通路被大致布置为蜿蜒结构,并沿翼面的后边缘导引至空气出口。用于形成内部冷却回路的铸造型芯包括成对支撑销,该成对支撑销连接型芯的不同对相邻实心腿部,用于加强上述型芯。在铸造之后,具有方形或矩形横截面形状的这些销形成连接相邻冷却通路的跨接孔。
已经发现产生的方形或矩形跨接孔会产生导致叶片失效的高应力区域。
发明内容
在本发明的示例性实施例中,改变型芯支撑销以具有圆形横截面,由此以减小产生的跨接孔中的应力。在其他实施例中去除了型芯支撑销,由此也消除了关联于跨接孔的任何应力导致失效的可能性。
因此,在一个实施例中,本发明涉及一种减小涡轮机叶片中应力的方法,所述涡轮机叶片具有由铸造型芯形成的内部冷却回路,所述铸造型芯包括具有方形或矩形横截面的横向延伸支撑销,所述方法包括:(a)重新设计所述支撑销以使其具有圆形横截面;或者(b)去除相邻冷却通路之间的跨接孔。
在另一实施例中,本发明涉及一种减小第一级或第二级涡轮机叶片中应力的方法,所述涡轮机叶片具有由铸造型芯形成的内部冷却回路,所述铸造型芯包括至少两根具有方形或矩形横截面的横向延伸支撑销,所述方法包括:(a)重新设计所述支撑销以使其具有圆形横截面;或者(b)去除相邻冷却通路之间的跨接孔。
现将参考以下附图描述本发明。
附图说明
图1是根据本发明的示例性实施例的第一级气涡轮机叶片的立体图;
图2是类似于图1所示的叶片的透视图,示出了内部冷却通路以及叶片的翼面部;以及
图3是用于制造图2所示的涡轮机叶片的铸造型芯的侧视图。
具体实施方式
参考图1,第一级气涡轮机叶片10可包括燕尾安装部12、位于燕尾安装部的径向外端部处的平台14、以及径向向外延伸的翼面部16。翼面部形成有前边缘18及后边缘20。
参考图2,在叶片的内部(具体指在翼面部内)铸造形成冷却回路,该冷却回路包括蜿蜒布置的冷却通路,其沿着其中冷却空气经由多个孔离开翼面的叶片后边缘20终结。利用图3所示的类型的铸造型芯来形成冷却回路。铸造型芯22包括入口部24以及多个并排(大致平行)的实心部(或腿部)26,28,30,32及34,在铸造并去除了型芯材料之后,这些实心部分别形成冷却空气入口及冷却空气通路。此型芯的实心部之间的空的空间变为分隔叶片内冷却通路的实心内肋。
本发明的重点在于型芯支撑销36及38,其主要用于加固型芯以防止型芯在铸造过程中损坏。参考图2,由40,42,44,46及48示出的内部铸造型芯形成冷却通路。图2还示出了由销36,38形成的跨接孔50及52。
已经发现公知的形成有矩形或方形横截面的销会产生高应力区域,该高应力区域会导致叶片跨接孔的角部处的失效。
在本发明示例性实施例中,销36,38形成圆形横截面,由此可形成圆形跨接孔52,54。这种改变消除了或至少减小了高应力区域,并且如果没有消除的话也最小化在这些区域中产生铸造缺陷的可能性。
在本发明的另一示例性实施例中,只是去除销36及38,在冷却通路之间不形成跨接孔。
本发明可具体应用于陆地用发电气轮机的第一级及第二级叶片。
虽然已经结合当前视为最可行且最佳的实施例描述了本发明,但应当理解的是本发明并不限于所揭示的实施例,相反,本发明意在涵盖落入所附权利要求精神及范围内的各种不同的改变及等同设置。
部件列表
涡轮机叶片10
安装部12
平台14
翼型部16
前边缘18
后边缘20
铸芯22
入口部24
坚固部(或腿部)26,28,30,32及34
支撑销36及38
冷却通路40,42,44,46及48
跨接孔50,52
Claims (8)
1.一种减小涡轮机叶片(10)中应力的方法,所述涡轮机叶片(10)具有由铸造型芯(22)形成的内部冷却回路,所述铸造型芯(22)包括具有方形或矩形横截面的横向延伸支撑销(36,38),所述方法包括:
(a)重新设计所述支撑销(36,38)以使其具有圆形横截面;或者
(b)去除相邻冷却通路之间的跨接孔(50,52)。
2.如权利要求1所述的方法,其中:
所述冷却回路大致全部布置在所述涡轮机叶片的翼面部(16)内。
3.如权利要求2所述的方法,其中:
所述型芯至少形成有两根支撑销(36,38)。
4.如权利要求1所述的方法,其中:
所述铸造型芯(22)包括由间隔的大致平行腿部(26,28,30,32及34)构成的蜿蜒形状冷却通路形成部分。
5.如权利要求4所述的方法,其中:
所述铸造型芯包括连接所述间隔的大致平行腿部的相邻腿部的不同对的至少两根所述支撑销(36,38)。
6.如权利要求1所述的方法,其中:
所述涡轮机叶片(10)是第一级叶片。
7.如权利要求1所述的方法,其中:
所述涡轮机叶片(10)是第二级叶片。
8.一种减小第一级或第二级涡轮机叶片(10)中应力的方法,所述涡轮机叶片(10)具有由铸造型芯(22)形成的内部冷却回路,所述铸造型芯(22)包括至少两根具有方形或矩形横截面的横向延伸支撑销(36,38),所述方法包括:
(a)重新设计所述支撑销(36,38)以使其具有圆形横截面;或者
(b)去除相邻冷却通路之间的跨接孔(50,52)。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/493021 | 2006-07-26 | ||
US11/493,021 US20080028606A1 (en) | 2006-07-26 | 2006-07-26 | Low stress turbins bucket |
Publications (1)
Publication Number | Publication Date |
---|---|
CN101113676A true CN101113676A (zh) | 2008-01-30 |
Family
ID=38894058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN200710136997.3A Pending CN101113676A (zh) | 2006-07-26 | 2007-07-26 | 低应力涡轮机叶片 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080028606A1 (zh) |
EP (1) | EP1895097A2 (zh) |
JP (1) | JP2008031995A (zh) |
CN (1) | CN101113676A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105026072A (zh) * | 2013-02-06 | 2015-11-04 | 西门子股份公司 | 用于具有扭曲的肋的扭曲的燃气涡轮发动机翼面的铸造型芯 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5254675B2 (ja) * | 2008-06-16 | 2013-08-07 | 三菱重工業株式会社 | タービン翼製造用中子およびタービン翼の製造方法 |
JP5655210B2 (ja) | 2011-04-22 | 2015-01-21 | 三菱日立パワーシステムズ株式会社 | 翼部材及び回転機械 |
US9376922B2 (en) | 2013-01-09 | 2016-06-28 | General Electric Company | Interior configuration for turbine rotor blade |
WO2014112968A1 (en) * | 2013-01-15 | 2014-07-24 | United Technologies Corporation | Gas turbine engine component having transversely angled impingement ribs |
JP6216618B2 (ja) * | 2013-11-12 | 2017-10-18 | 三菱日立パワーシステムズ株式会社 | ガスタービン翼の製造方法 |
EP2944762B1 (en) * | 2014-05-12 | 2016-12-21 | General Electric Technology GmbH | Airfoil with improved cooling |
FR3056631B1 (fr) * | 2016-09-29 | 2018-10-19 | Safran | Circuit de refroidissement ameliore pour aubes |
US10753210B2 (en) * | 2018-05-02 | 2020-08-25 | Raytheon Technologies Corporation | Airfoil having improved cooling scheme |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3533712A (en) * | 1966-02-26 | 1970-10-13 | Gen Electric | Cooled vane structure for high temperature turbines |
US4497613A (en) * | 1983-01-26 | 1985-02-05 | General Electric Company | Tapered core exit for gas turbine bucket |
US4526512A (en) * | 1983-03-28 | 1985-07-02 | General Electric Co. | Cooling flow control device for turbine blades |
US4923371A (en) * | 1988-04-01 | 1990-05-08 | General Electric Company | Wall having cooling passage |
US5947181A (en) * | 1996-07-10 | 1999-09-07 | General Electric Co. | Composite, internal reinforced ceramic cores and related methods |
US6340047B1 (en) * | 1999-03-22 | 2002-01-22 | General Electric Company | Core tied cast airfoil |
US6234753B1 (en) * | 1999-05-24 | 2001-05-22 | General Electric Company | Turbine airfoil with internal cooling |
US6186741B1 (en) * | 1999-07-22 | 2001-02-13 | General Electric Company | Airfoil component having internal cooling and method of cooling |
US6164914A (en) * | 1999-08-23 | 2000-12-26 | General Electric Company | Cool tip blade |
US6966756B2 (en) * | 2004-01-09 | 2005-11-22 | General Electric Company | Turbine bucket cooling passages and internal core for producing the passages |
US7216694B2 (en) * | 2004-01-23 | 2007-05-15 | United Technologies Corporation | Apparatus and method for reducing operating stress in a turbine blade and the like |
-
2006
- 2006-07-26 US US11/493,021 patent/US20080028606A1/en not_active Abandoned
-
2007
- 2007-07-09 EP EP07112069A patent/EP1895097A2/en not_active Withdrawn
- 2007-07-12 JP JP2007182707A patent/JP2008031995A/ja not_active Withdrawn
- 2007-07-26 CN CN200710136997.3A patent/CN101113676A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105026072A (zh) * | 2013-02-06 | 2015-11-04 | 西门子股份公司 | 用于具有扭曲的肋的扭曲的燃气涡轮发动机翼面的铸造型芯 |
Also Published As
Publication number | Publication date |
---|---|
US20080028606A1 (en) | 2008-02-07 |
EP1895097A2 (en) | 2008-03-05 |
JP2008031995A (ja) | 2008-02-14 |
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PB01 | Publication | ||
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Open date: 20080130 |