TW200422511A - Leak resistant vane cluster - Google Patents
Leak resistant vane cluster Download PDFInfo
- Publication number
- TW200422511A TW200422511A TW092126331A TW92126331A TW200422511A TW 200422511 A TW200422511 A TW 200422511A TW 092126331 A TW092126331 A TW 092126331A TW 92126331 A TW92126331 A TW 92126331A TW 200422511 A TW200422511 A TW 200422511A
- Authority
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- Prior art keywords
- blade group
- linear
- slot
- scope
- item
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
- F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
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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
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
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- 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
- F05D2230/10—Manufacture by removing material
- F05D2230/12—Manufacture by removing material by spark erosion methods
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- 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
- F05D2240/55—Seals
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- 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
- F05D2250/00—Geometry
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- 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
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/183—Two-dimensional patterned zigzag
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
200422511 玖、發明說明: 【發明所屬之技術領域】 么本1月係有關一型^用於輪機引擎之加有覆緣之輪葉 、且特別係有關具有防漏片段式覆緣之輪葉組。 【先前技術】 典型燃氣輪機引擎之壓縮機部份,包含界引擎轴、 :軸向人替设置之成列定置之輪葉與可旋轉葉片之盒箱。 每輪葉列可由於盒箱内部周圍分佈之多重輪葉組構成, \ t有由風箱所支持之輪葉組。每一輪葉組包含一沿徑内 《内覆緣,—沿徑之外覆緣,以及兩個或多個延伸於覆緣 ϋ剖面。内外覆緣共同界定工作用媒介流體之部份 環狀流道之範圍。 在引擎運轉之際,輪葉組係暴露於不一致之加孰虚冷 卻。伴隨之溫度升降會因輪葉組之過份應力而造成傷害。 為協助舒解此等熱導之應力,兩個覆緣其中之—可藉狹孔 於兩個相鄰翼剖面周HJ中間處將覆緣切割而分刻為片段。 由於每-輪葉組之外覆緣與輪葉組連接,於此狀況中二 1上係將内覆’而非外覆緣,分為片段。狹孔藉使覆緣片 段彼此不相干地展開與收縮,而降低損害之風險。 一項用於構成狹孔之技術為線材放電加工法(EDM)。系 材放電製成法利用一充電電極,其形式係一線材纏銬於泉 源頭線軸,並延伸至一捲取線軸。輪葉 :於 復、,家則暴露於線 軸(間之線材。在放電製成操作之際,線 水珂目源頭線軸移 動至捲取線軸,並同時地向前至覆緣。於線 衣柯电極與覆緣 88049.doc 之間之放電差異,造成一放電而自覆緣除去一些物質。當 物質除去時,線材向前通過覆緣直至狹孔完全形成為止。 狹孔之一項缺點為,在引擎運轉時,其提供一條使工作 用媒介流體漏出流道,或者使非工作用媒介流體漏入流道 <路徑。可使用一小直徑放電製成之線材來切成一細薄狹 孔’即一附有對應狹窄鋸口之狹孔,使洩漏可在某一程度 上予以減輕。惟細薄放電製或用線材之使用導致製成時間 之增加。更且,細薄放電製成用線材在放電製成法之操作 中,比厚放電製成用線材易於斷裂。細放電製成用線材亦 比厚放私製成用線材,更可能為卡在輪葉組細微顆粒不潔 物之存在而受到阻礙。最後,能夠使用細線材之商業用放 電製成設備,係比能夠使用較厚線材之放電製成設備更專 業化。其結果’製造者發現投資於更專業化之細線材設備, 係省錢而不具吸引力。因此,吾人期望避免細薄狹孔而贊 同相當寬廣之狹孔。 、 一\降低自-寬廣狹錢漏之方法即,於狹孔内部提/ -凹部,並於凹部内安裝一密封。美國專利案3,728 041 冰〇,川以及5,167,485顯示此型式之配置。雖此等密封, 易於個別輪葉之覆緣之間安裝,或於鄰接輪葉組 之間安裝,其係不㈣另—之單—輪葉組之内翼剖面覆: 2内’構成内凹部狹孔增加製作成本並降― 忐。另一個減輕洩漏之可能方法。即安裝一外密封, 美國專利案4,422,827所示之封條78,以跨㈣ 此等外密封亦增加製作成本。 88049.doc -6- ^ ^所而為一附有隔溫覆緣片段之輪葉組,其係省錢且 谷易製作。 【發明内容】 、據本I明’ 一輪葉組包括一覆緣,其附有一非直線狹 :延㈣過此處’以將覆緣分割為隔溫覆緣片段。狹孔係 、…可用傳統〈線材S電製成設備簡易不花費地製作,之 配對非直線表面予X八R , 丁以刀界。此等非直線狹孔有效地防止流 體之洩漏。 【實施方式】 。參〃、、圖1 -5 ’ 一用於輪機引擎壓縮機之輪葉組包含一徑向 α卜覆、彖10,一沿徑内覆緣12,以及兩個或多個於覆緣之 門’口徑向或翼展方向地延伸之翼剖面14。位於外覆緣軸向 釣部16使其方便固著於一未示之引擎盒箱。於内覆 軸向末领之腳部18容納一亦未示之内部氣封。輪葉組於 側末端20之間依圓周延伸。當若干個此輪葉組安裝於一輪 機引擎内時’覆緣界定部份之環狀流體之流道22之沿徑内 外範圍。流道劃定一未示之引擎軸。輪葉組本身係一典型 模鑄金屬品加工,依指定之大小製成。 内覆緣12係藉周圍相鄰之翼剖面14之間之非直線狹孔% J為個別片段24。狹孔係藉線材放電製成法或其他適當 加工予以裝置。四個不同型式之狹孔顯示於圖丨,惟僅一型 式< 狹孔經常使用於既有輪葉組。内覆緣最左邊部份係顯 不於其,’原來鑄成狀態",即無狹孔。每一狹孔係非直線形, 惟可包含兩個或多個如圖2-4最佳所見之直線部份。每一狹 88049.doc 200422511 孔為一對或配對表面,如28a、28b,所分界。如於此處使 用者,”配對”一詞係指彼此實質正確地對應表面,即彼此 互補之表面。此情形正與美國專利案3,728,〇4卜3,97〇,318 , 以及5,167,485所示之表面相反,此等表面均有顯著之内凹 部狹孔’使鄰接之狹孔表面不成配對。 圖2-5顯示四個較詳細之狹孔。首先參照圖2,非直線狹 孔26包含三個直線部份26a、26b、26c,每一部份具有一接 合點32’其附有其他部份其中之_。每—接合點與於狹孔 内角度万向之變更符合。例如,狹孔部份2以與勘之間接 合點32,符合由徑向至側向約9〇度之角度定位變更。狹孔 部份26b與26c之間其他接合點32,符合由侧向至徑向另一 約90度之變更。故累積之角度變更為約18〇度。 圖3顯示另-形式,其内狹孔包含三個直線部份與兩接合 點。每-接合點符合-約12〇度之角度定位之變更,其累積 之角度更為約240度。 圖4顯tf另#式’其内狹孔包含七個直線部份與六個接 合點。每-接合點符合-約90度之角度定位之變更,其累 積之角度為約540度。 接合點32角度定位之㈣變更,協助防止液體通過狹孔 之戍漏’ ϋ因此允許,在其他方面可能不令人滿意,卻可 不花費地安裝,之相當寬廣狹孔之使用。每一定位之變更 增進流體之防漏。其結果,較大與/或更多陡山肖變更係優於 較小與/或較少㈣變更者。因此,雖僅具有兩個直線部份 與一接合點之狹孔可供使用,吾人認為最實用與省錢之狹 88049.doc 2004225 11 孔,係附有至少三個直線部份與總度數至少約18〇度之定位 變更之狹孔。較多數量之直線部份可望更進一步增進狹孔 之防漏,惟對應之較長狹孔長度會增加使用線材放電製成 法切割狹孔所需之時間。防漏與製作之複雜性係一件輪葉 組設計者與製造者要考慮之事。 如圖6-8所見,非直線狹孔不需包含如上面實例之直線部 份,惟可為一具有一或多個曲率半徑之彎曲狹孔代替之。 平均曲率半徑R可沿狹孔長度連續地改變(圖6)或斷續地改 變(圖7),因而於狹孔之個別部份26a、2讣界定一或多個明 顯之接合點32。如圖8所見,一狹孔可包含彎曲與直線部份 兩者之混用。由於狹孔之防漏端視方向變更之陡峭程度與 數量而定,一平穩之彎曲狹孔可能提供不令人滿意之防 漏。附有陡峭方向變更之彎曲狹孔咸信優於一平穩之彎 曲’惟係比包含有直線部份之狹孔較難於製作。一具有多 重連續改變之曲率半徑之彎曲狹孔實例,屬圖5之蛇狀狹 孔。 狹孔無需周圍地安裝於每一與所有之翼剖面之間,惟係 可選擇地安裝代替之,例如,於每一第二或第三翼剖面之 間’以達成所需之隔溫程度。 圖1之輪葉組係輪葉單一成列之一段或階段。於某些引擎 中,輪葉組包含兩個或多個周圍對齊之次輪葉組,彼此成 為一體’惟其藉一階段間之空間於軸向上彼此分開。於一 完全總成之引擎中,旋轉案片沿徑地延伸進入階段間之空 間本發明包括此多重階段之輪葉組,以及例示之單一階 88049.doc -9- 200422511 段輪葉組。 如圖9所見’狹孔2 6之非直緩幽彳 >主 π直、,果4何情形,亦可作為鄰接輪 葉組側末端20之間之對昭面。a ^ 打…、面此一構造包括内與外覆緣 10、12,其附有至少一翼剖面正 吳y曲延伸於覆緣之間。至少其中 -覆緣’如内覆緣12,之侧末端,具有—非直線輪廊,其 與侧面鄰接輪葉組之末端上對應之非直接輪廓配對。 雖本發明已就有關用於壓縮機之固^輪葉作出呈現,其 同等地適用於輪機。除此,本發明包括輪葉組,其中外覆 緣,非内覆緣,係成片段狀覆緣。熟習本項技藝者應可瞭 解 y式人、”田郎上之此等與其他更改係可為之,毋需脫離 本發明’如可附申請專利範圍所揭示者。 【圖式簡單說明】 圖1為一輪葉組之透視圖,其沿徑之内覆緣係由本發明所 包括之狹孔分為片段。 圖2·5為圖1所示狹孔之放大圖。 圖6·8為具有曲線部份之狹孔之放大圖。 圖9為圖1之相似圖,顯示一輪葉組附有一非直線輪廓於 其内覆緣之側末端。 圖 10 12 14 16 18 式代表符號說明】 外覆緣 内覆緣 翼剖面 釣部 腳部 88049.doc 200422511 20 末端 22 流道 24 片段 26 狹孔 26a 直線部份 26b 直線部份 26c 直線部份 28a 配對表面 28b 配對表面 32 接合點 R 平均曲率半徑
88049.doc - 11 -
Claims (1)
- 200422511 拾、申請專利範園·· 1·—種輪葉組,包含·· 一外覆緣; 一内覆緣; 至少兩個延伸於覆緣之間之翼剖面; 其中一覆緣具有一非直線狹孔延伸通過相鄰翼側面之 間之覆緣,以界定覆緣片段,每一狹孔以配對之非直線 表面為分界。 如申,專利範圍第1項之輪葉組,其中非直線狹孔包含至 y兩個狹孔部份與一接合點於其間,每一接合點對應於 一角度定位之變更。 申μ專利範圍第2項之輪葉組,包含至少三個狹孔部 份’並附有兩個角度定位之變更。 4_ 2申請專利範圍第3項之輪葉組,其中角度定位之變更界 定一至少約180度之累積角度變更。 5·如申請專利範圍第丨項之輪葉組,其中非直線狹孔包含一 ¥曲部份。 6.如申請專利_第i項之輪葉組,*中每一非4線狹孔包 含至少兩個直線部份。 7·如申請專利範圍第丨項之輪葉組’其中該具有一非直線狹 孔延伸通過之覆緣為内覆緣。 如申印專利範圍第1項之輪葉組,其中非直線狹孔係呈現 於輪葉組之每一與全部相鄰之翼剖面之間。 9·如申請專利範圍第i項之輪葉組,其中狹孔係以放電加工 88049.doc 200422511 形成。 10· —種輪葉組,包含: 一具有外側末端之外覆緣; 一具有内側末端之内覆緣; 至少一延伸於覆緣之間之翼剖面; 外與内覆緣其中之一之側末端具有一非直線輪廓,其 與側面相鄰輪葉組之側末端上之對應非直線輪廓配對。88049.doc
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/266,649 US6910854B2 (en) | 2002-10-08 | 2002-10-08 | Leak resistant vane cluster |
Publications (2)
Publication Number | Publication Date |
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TW200422511A true TW200422511A (en) | 2004-11-01 |
TWI266828B TWI266828B (en) | 2006-11-21 |
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Family Applications (1)
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TW092126331A TWI266828B (en) | 2002-10-08 | 2003-09-24 | Leak resistant vane cluster |
Country Status (9)
Country | Link |
---|---|
US (1) | US6910854B2 (zh) |
EP (1) | EP1408199B1 (zh) |
JP (1) | JP2004132372A (zh) |
CN (1) | CN101405478A (zh) |
DE (1) | DE60313716T2 (zh) |
IL (1) | IL158258A (zh) |
SG (1) | SG126730A1 (zh) |
TW (1) | TWI266828B (zh) |
WO (1) | WO2004033871A2 (zh) |
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- 2002-10-08 US US10/266,649 patent/US6910854B2/en not_active Expired - Lifetime
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- 2003-09-17 SG SG200305632A patent/SG126730A1/en unknown
- 2003-09-24 TW TW092126331A patent/TWI266828B/zh not_active IP Right Cessation
- 2003-10-02 EP EP03256227A patent/EP1408199B1/en not_active Expired - Fee Related
- 2003-10-02 DE DE60313716T patent/DE60313716T2/de not_active Expired - Lifetime
- 2003-10-02 IL IL158258A patent/IL158258A/en not_active IP Right Cessation
- 2003-10-03 JP JP2003345506A patent/JP2004132372A/ja active Pending
- 2003-10-08 CN CNA2003801053805A patent/CN101405478A/zh active Pending
- 2003-10-08 WO PCT/US2003/031973 patent/WO2004033871A2/en active Application Filing
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WO2004033871A3 (en) | 2009-04-23 |
IL158258A0 (en) | 2004-05-12 |
CN101405478A (zh) | 2009-04-08 |
JP2004132372A (ja) | 2004-04-30 |
US20040067131A1 (en) | 2004-04-08 |
EP1408199A1 (en) | 2004-04-14 |
IL158258A (en) | 2006-06-11 |
TWI266828B (en) | 2006-11-21 |
SG126730A1 (en) | 2006-11-29 |
DE60313716T2 (de) | 2008-01-24 |
DE60313716D1 (de) | 2007-06-21 |
US6910854B2 (en) | 2005-06-28 |
WO2004033871A2 (en) | 2004-04-22 |
EP1408199B1 (en) | 2007-05-09 |
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