JP2002038904A - Stator diaphragm for steam turbine and method of making it - Google Patents

Stator diaphragm for steam turbine and method of making it

Info

Publication number
JP2002038904A
JP2002038904A JP2001117568A JP2001117568A JP2002038904A JP 2002038904 A JP2002038904 A JP 2002038904A JP 2001117568 A JP2001117568 A JP 2001117568A JP 2001117568 A JP2001117568 A JP 2001117568A JP 2002038904 A JP2002038904 A JP 2002038904A
Authority
JP
Japan
Prior art keywords
diaphragm
cavity
steam turbine
stator
blade
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
Application number
JP2001117568A
Other languages
Japanese (ja)
Other versions
JP2002038904A5 (en
Inventor
Giuseppe Ghelli
ジセッペ・ゲリ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuovo Pignone Holding SpA
Nuovo Pignone SpA
Original Assignee
Nuovo Pignone Holding SpA
Nuovo Pignone SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nuovo Pignone Holding SpA, Nuovo Pignone SpA filed Critical Nuovo Pignone Holding SpA
Publication of JP2002038904A publication Critical patent/JP2002038904A/en
Publication of JP2002038904A5 publication Critical patent/JP2002038904A5/ja
Pending legal-status Critical Current

Links

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
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F01D9/044—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting or the like
    • 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
    • F05D2230/13—Manufacture by removing material using lasers
    • 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
    • F05D2230/22—Manufacture essentially without removing material by sintering
    • 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
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • 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

Abstract

PROBLEM TO BE SOLVED: To provide a method of making a stator diaphragm for a steam turbine or a gas expander. SOLUTION: This method includes a step preparing two rings 12, 13 applying individual work for obtaining radial directional slots 15, 15' having a contour of a blade 11 in a stator step of a steam turbine or a gas expander to be suited for receiving the blade 11 later, a suitable amount of paste-state brazing materials 14, 14' is inserted into the spaces 15, 15', furnace brazing work in a vacuum is applied to a diaphragm 10. Additionally in this invention, the stator diaphragm 10 thus made for the steam turbine or the gas expander is also provided.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は蒸気タービン又はガ
ス膨張器のステータ・ダイアフラムを作る方法に関す
る。更に本発明は、蒸気タービン又はガス膨張器用のス
テータ・ダイアフラムに関する。The present invention relates to a method for making a stator diaphragm for a steam turbine or a gas expander. The invention further relates to a stator diaphragm for a steam turbine or a gas expander.

【０００２】[0002]

【従来の技術】公知のように、蒸気タービンは、蒸気、
一般的には水蒸気の供給を受けて、蒸気又は予め圧縮さ
れたガスの膨張によって得られる運動エネルギの一部分
を機械的な仕事に変換するのに適した機械である。2. Description of the Related Art As is well known, a steam turbine includes steam,
Generally, it is a machine suitable for receiving a supply of water vapor and converting a portion of the kinetic energy obtained by the expansion of the vapor or pre-compressed gas into mechanical work.

【０００３】特に、このような機械では、予め過熱した
又は飽和した蒸気或いは圧縮ガスを、交互にある幾つか
のステータ及びロータ段に通すことにより、タービン内
で膨張させる。[0003] In particular, in such machines, preheated or saturated steam or compressed gas is expanded in a turbine by passing it through several alternating stator and rotor stages.

【０００４】ロータ段は、全体的なトルクを伝達する原
動機軸と一体であり、これに対してステータ段は回転羽
根の入口に適当な状態の蒸気又はガスの流れを送り込む
のに役立つ。[0004] The rotor stage is integral with the prime mover shaft, which transmits the overall torque, while the stator stage serves to direct the appropriate steam or gas flow into the inlet of the rotating blades.

【０００５】ステータは１組の固定羽根（静翼）によっ
て構成され、その各対の羽根の間に対応するノズルが配
置されている。The stator is constituted by a set of fixed blades (stationary blades), and a corresponding nozzle is arranged between each pair of blades.

【０００６】ある段の全ての固定羽根はタービンのケー
スに固定されると共に、内部では適当な固定要素、普通
キャノピー(canopy)と呼ばれるものに固定される。[0006] All stationary blades of a stage are fixed to the case of the turbine and internally to a suitable fixing element, commonly referred to as a canopy.

【０００７】公知の構造を持つ蒸気タービン又はガス膨
張器のステータ部分を作ると共に組立てる現在の技術
は、次のような加工サイクルに基づいている。[0007] The current technology for making and assembling the stator portion of a steam turbine or gas expander having a known structure is based on the following processing cycle.

【０００８】最初、寸法通りに切断した引抜きバーの両
端を加工して、ケースに対する継手とキャノピーに固定
されるピンを作ることによって、羽根が得られる。[0008] The blades are obtained by first machining the ends of the drawn bar, cut to size, to make a joint to the case and a pin that is fixed to the canopy.

【０００９】更に具体的に言うと、ケースがＣ字形空所
を持ち、その内側の円周方向に羽根が導入される。More specifically, the case has a C-shaped space, into which the blades are introduced in the circumferential direction.

【００１０】羽根の間のピッチが、ケースに係止する
為、羽根と同じ末端加工を受けるスペーサ・ヒール(hee
l)によって確実にされる。[0010] Since the pitch between the blades is locked to the case, the spacer heel is subjected to the same end processing as the blades.
l) ensured.

【００１１】次にタービンのケースに設けられたスロッ
トに羽根とヒールを交互に取付ける。Next, blades and heels are alternately mounted in slots provided in the turbine case.

【００１２】次に適当に穿孔したリングを羽根の他端に
取付け、羽根のピンをリングにリペット留めすることに
よってそれを確実に係止する。A suitably perforated ring is then attached to the other end of the blade, and the blade pin is securely locked by ripping the ring into the ring.

【００１３】しかし、上に述べたステータ段を取付ける
装置は、かなりの手作業の技を必要とし、この為組立て
時間が長く、その出来映えの品質は、個々の作業員の能
力次第になる。[0013] However, the above-described apparatus for mounting the stator stage requires considerable manual work, which results in long assembly times and the quality of the workmanship depends on the capabilities of the individual workers.

【００１４】更に、この製造方法は、長年の間有効であ
ることが証明されているが、今日では、現在の競争力の
強い市場の典型的な条件となる特性である短い製造時間
及びプロセスの再現性という現在の条件にあまり合わな
い。Furthermore, while this manufacturing method has proven to be effective for many years, it is nowadays a short manufacturing time and process that are properties that are typical of today's competitive markets. Does not fit the current condition of reproducibility.

【００１５】最後に、例えば交換が必要になったとき、
この種のステータ段を取外すには、将に部品の数が多い
為に、かなりの長さの時間を必要とする。Finally, for example, when replacement becomes necessary,
Removal of this type of stator stage requires a considerable amount of time due to the large number of components.

【００１６】[0016]

【発明が解決しようとする課題】そこで本発明の目的
は、蒸気タービン又はガス膨張器のステータ・ダイアフ
ラムを作る方法として、製造及び組立て時間を短縮する
と共に、それに伴う加工作業を減らし、その結果経済的
に大きな利点が得られるようにする方法を提供すること
である。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method of making a stator diaphragm for a steam turbine or gas expander, which reduces manufacturing and assembly time and the associated machining operations, thereby reducing economics. It is to provide a method that enables a great advantage to be obtained.

【００１７】本発明の別の目的は製造上の誤差を実質的
に少なくすることが出来るような、蒸気タービン又はガ
ス膨張器のステータ・ダイアフラムを製造並びにろう付
けする方法を提供することである。It is another object of the present invention to provide a method for manufacturing and brazing a stator diaphragm of a steam turbine or gas expander that can substantially reduce manufacturing errors.

【００１８】本発明の別の目的は、後の修理又は交換作
業をかなり簡単にすることが出来るような、蒸気タービ
ン又はガス膨張器のステータ・ダイアフラムを製造及び
ろう付けする方法を提供することである。It is another object of the present invention to provide a method for manufacturing and brazing a stator diaphragm of a steam turbine or gas expander that can substantially simplify subsequent repair or replacement operations. is there.

【００１９】[0019]

【課題を解決するための手段】上記並びにその他の目的
を達成するために、蒸気タービン又はガス膨張器のステ
ータ・ダイアフラムを作る方法によって達成される。こ
の方法は、前記蒸気タービン又はガス膨張器のステータ
段の羽根の輪郭を持つと共に、その後で前記羽根を収容
するのに適した半径方向空所を得る為に別々に加工され
た２つのリングを用意する段階を含み、ペースト状の適
当量のろう付け材料を前記空所に挿入し、前記ダイアフ
ラムを真空中の炉内ろう付け作業にかけることを特長と
する。The above and other objects are achieved by a method of making a stator diaphragm for a steam turbine or gas expander. The method comprises the steps of forming two rings, each having the profile of the blades of the stator stage of the steam turbine or gas expander and subsequently machined separately to obtain a radial space suitable for accommodating the blades. Providing a suitable amount of brazing material in paste form into the cavity and subjecting the diaphragm to a furnace brazing operation in a vacuum.

【００２０】本発明の好ましい実施例では、リングを用
意する段階が、数値制御工作機械の助けを借りて、羽根
の輪郭を持つ半径方向空所を得る為に、ウォータ・ジェ
ット切削によってリングを別々に加工することによって
達成される。In a preferred embodiment of the present invention, the step of providing the ring includes separating the ring by water jet cutting with a help of a numerically controlled machine tool to obtain a radial cavity having a blade profile. It is achieved by processing.

【００２１】本発明の別の好ましい実施例では、リング
の空所を用意する段階が、レーザを用いてこの空所を切
削することによって達成される。In another preferred embodiment of the present invention, the step of providing a ring cavity is accomplished by cutting the cavity with a laser.

【００２２】この代わりとしては、リングの空所を用意
する段階は、電子放電加工によって空所を切削すること
によって達成される。Alternatively, preparing the ring cavity is accomplished by cutting the cavity by electronic discharge machining.

【００２３】本発明の別の好ましい実施例では、ペース
ト状のろう付け材料を、羽根の輪郭を持つ前記空所内に
挿入する。この後の真空中での炉内ろう付け作業が、ろ
う付け材料が羽根の輪郭と前記空所の間の隙間に浸透す
ることを促進する。In another preferred embodiment of the invention, a paste-like brazing material is inserted into the cavity having the contour of the blade. Subsequent in-furnace brazing in a vacuum facilitates penetration of the brazing material into the gap between the blade profile and the cavity.

【００２４】本発明の別の好ましい実施例では、ろう付
け作業の後、ダイアフラムを最終寸法に従って加工し、
電子放電加工によって２つの半リングに切断して、前記
蒸気タービン又はガス膨張器のケース内に最終的に取付
ける。In another preferred embodiment of the invention, after the brazing operation, the diaphragm is machined according to final dimensions,
It is cut into two half-rings by electronic discharge machining and finally mounted in the case of the steam turbine or gas expander.

【００２５】本発明は、蒸気タービン又はガス膨張器用
のステータ・ダイアフラムにも関係する。このステータ
・ダイアフラムは、羽根の輪郭を持つと共に、後に前記
羽根を収容するのに適した半径方向空所を得る為に別々
に加工された２つのリングを有し、ペースト状の適当量
のろう付け材料を前記空所に挿入することを特長として
いる。The present invention also relates to a stator diaphragm for a steam turbine or a gas expander. The stator diaphragm has the profile of the blade and has two rings which are separately machined to obtain a radial space suitable for accommodating the blade later, and a suitable amount of paste-like solder. It is characterized in that an attachment material is inserted into the space.

【００２６】本発明のこの他の特長は特許請求の範囲に
記載してある。[0026] Other features of the invention are set forth in the appended claims.

【００２７】本発明のその他の目的並びに利点は、これ
に限るものではないが、説明する為の例としてのみ示し
た添付図面について以下説明するところを読めば、明ら
かになろう。[0027] Other objects and advantages of the present invention will become apparent from the following description, given by way of non-limiting example only, with reference to the accompanying drawings, given by way of illustration only.

【００２８】[0028]

【発明の実施の形態】図面を参照して具体的に説明する
と、ステータ・ダイアフラムと、それに固定された羽根
とで構成される集成体が、全体的に参照数字１０で示さ
れている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring specifically to the drawings, an assembly comprising a stator diaphragm and blades fixed thereto is indicated generally by the reference numeral 10.

【００２９】本質的に、本発明の加工方法では、各々の
羽根１１が両端で２つのリング１２及び１３に固定され
てダイアフラム１０を構成する。In essence, in the processing method of the present invention, each blade 11 is fixed to the two rings 12 and 13 at both ends to constitute the diaphragm 10.

【００３０】具体的に言うと、各々の羽根１１の第１の
端が内側リング１２に固定され、各々の羽根１１の別の
端が外側リング１３に固定される。Specifically, a first end of each blade 11 is fixed to the inner ring 12 and another end of each blade 11 is fixed to the outer ring 13.

【００３１】次にこうして形成されたダイアフラム１０
が、矩形断面を持つ空所が予め作られている蒸気タービ
ン又はガス膨張器のケースに取付けられる。Next, the diaphragm 10 thus formed is formed.
Are mounted in the case of a steam turbine or gas expander in which a cavity with a rectangular cross section is pre-made.

【００３２】こうしてダイアフラム１０が、ウォータ・
ジェットの切削過程を用いて別々に加工された好ましく
は鍛造された２つのリング１２及び１３を用いて得られ
る。Thus, the diaphragm 10 is
It is obtained using two preferably forged rings 12 and 13 machined separately using a jet cutting process.

【００３３】こうして羽根１１の輪郭を持つ半径方向ス
ロットが作られ、この後で羽根を収容する。A radial slot having the contour of the blade 11 is thus created, after which the blade is received.

【００３４】切削は数値制御工作機械を用いて実施され
る。Cutting is performed using a numerically controlled machine tool.

【００３５】本発明の多数のこの他の変形では、切削過
程はレーザを用いて、又は電子放電加工によって実施す
ることが出来る。In a number of other variants of the invention, the cutting process can be performed using a laser or by electro-discharge machining.

【００３６】羽根１１は常に引抜きバーから作られ、従
来実施されていたのと同じように所定寸法に切断される
が、それをケースに係止する為の上側空所を持つように
加工されず、従って、他端のピンは最早存在しない。The blade 11 is always made of a drawing bar and is cut to a predetermined size in the same manner as in the prior art, but is not machined so as to have an upper space for locking it to the case. Therefore, the pin at the other end is no longer present.

【００３７】ペースト状のろう付け材料１４及び１４’
が、空所１５及び１５’の中、並びに羽根１１の輪郭と
外側リング１３及び内側リング１２の空所１５及び１
５’の間の隙間に挿入される。Paste brazing materials 14 and 14 '
In the cavities 15 and 15 ′, as well as in the contours of the blades 11 and the cavities 15 and 1
Inserted in the gap between 5 '.

【００３８】ろう付けは、真空中の炉内で制御された温
度で、下記のパラメータに従って行われる。The brazing is performed at a controlled temperature in a furnace under vacuum according to the following parameters:

【００３９】この後の作業の為に安定な位置が確実に得
られるように、（リングの内側にだけ）溶接材料を用い
て小さな溶接ビードを作ることにより、羽根１１が固定
される。The blades 11 are fixed by making a small welding bead using the welding material (only inside the ring) to ensure a stable position for subsequent work.

【００４０】ろう付けペーストを注入する為の補助のリ
ネン仕上げの接着テープをリングの外径及び内径に適用
する。An auxiliary linen-finished adhesive tape for injecting brazing paste is applied to the outer and inner diameter of the ring.

【００４１】次に、ペーストの形をしたろう付け材料１
４及び１４’を、内側（１２）及び外側（１３）の直径
の両方の側から、リング上にある空所１５及び１５’に
注入するが、このとき、ペースト（１４及び１４’）
が、蒸気の流路と向かい合うスロットの縁の隅の限界ま
で上昇するように、注入圧力を制御することに注意を払
う。Next, a brazing material 1 in the form of a paste
4 and 14 'are injected from both sides of the inner (12) and outer (13) diameter into the cavities 15 and 15' on the ring, with the paste (14 and 14 ')
Note that the injection pressure is controlled to rise to the limit of the corner corner of the slot opposite the steam flow path.

【００４２】ろう付けは５×１０-3トル(Torr)未満の圧
力の真空中で炉内で行われる。Brazing is performed in a furnace in a vacuum at a pressure less than 5 × 10 −3 Torr.

【００４３】ろう付けの後、ダイアフラム１０を最終寸
法に従って加工し、その後電子放電加工又はレーザによ
り、２つの半リングに切断する。After brazing, the diaphragm 10 is machined according to its final dimensions and then cut into two half-rings by electronic discharge machining or laser.

【００４４】この為、ケースへの最終的な組込みは、２
つの半リングを取付けるというただ１つの段階に帰す
る。Therefore, the final incorporation into the case is 2
Attributable to only one stage of installing one half ring.

【００４５】本発明による蒸気タービンのステータ・ダ
イアフラムを作る方法の特長は、以上の説明から明らか
であろうし、その利点も明らかであろう。次に、こうい
う利点を更に詳しく述べる為に、まとめとして以下述べ
ることにする。The advantages of the method of making a stator diaphragm of a steam turbine according to the present invention will be apparent from the foregoing description, and its advantages will be apparent. Next, in order to describe these advantages in more detail, they will be summarized below.

【００４６】上に述べた本発明は、２つのリングを１個
のダイアフラム内に取付けることを可能にし、このリン
グの内側に対してステータの羽根をろう付けによって一
体にすることが出来る。The invention described above allows the two rings to be mounted in one diaphragm, into which the stator blades can be joined by brazing.

【００４７】この解決策は、部品の数を減らすことが出
来ると共に、必要になったとき、ダイアフラム１０を交
換する作業をかなり簡単にすることが出来る。This solution can reduce the number of parts and considerably simplify the task of replacing diaphragm 10 when needed.

【００４８】実際、本発明のステータ・ダイアフラム１
０の真に重要な一面は、従来の方式のように全部の羽根
１１ではなく、扱わなければならないのは上側の半リン
グ及び下側の半リングの２つの要素だけであることであ
る。In fact, the stator diaphragm 1 of the present invention
One really important aspect of 0 is that instead of all blades 11 as in the conventional scheme, only two elements have to be dealt with: the upper half ring and the lower half ring.

【００４９】これは、最終的な組立て並びに必要になっ
たときの任意の交換は、著しく短縮された時間で実行す
ることが出来、機械の運転停止時間が短くなり、それに
伴って経済的な節約をもたらす。This means that the final assembly as well as any replacement when needed can be performed in a significantly reduced time, resulting in reduced machine downtime and the associated economic savings. Bring.

【００５０】更に、ダイアフラムの構造的な強度が増加
し、製造方法の自動化並びに手作業の調節をなくしたこ
とにより、製造上の許容公差も小さくなる。In addition, the increased structural strength of the diaphragm and the elimination of automation and manual adjustment of the manufacturing method also reduce manufacturing tolerances.

【００５１】ウォータ・ジェット切削、特に数値制御機
械の技術は、スロット部の切削に適応させてあって、羽
根１１の輪郭上の平均隙間０．０５−０．２ ｍｍにす
ることが出来、加工が経済的になると共に結果が正確に
なる。The technology of water jet cutting, in particular of numerical control machines, is adapted to the cutting of the slot, so that the average gap on the contour of the blade 11 can be 0.05-0.2 mm. Is more economical and the results are more accurate.

【００５２】ここに述べた本発明の考えに特有の新規性
を失うことなく、本発明による蒸気タービンのステータ
・ダイアフラムを作る方法に種々の変更を加えることが
出来ることは明らかである。Obviously, various modifications can be made to the method of making the stator diaphragm of the steam turbine according to the present invention without losing the novelty inherent in the inventive concept described herein.

【００５３】最後に、本発明の実施に当たって、ここで
述べた部品の材料、形及び寸法は、必要に応じて任意の
ものにすることが出来、これらは技術的な観点から同等
の他のものに置き換えることが出来ることは言うまでも
ない。Finally, in practicing the present invention, the materials, shapes and dimensions of the components described herein may be any as desired, and these may be equivalent from a technical point of view. Needless to say, it can be replaced with

【図面の簡単な説明】[Brief description of the drawings]

【図１】ステータ・ダイアフラムの１組の固定羽根の内
の１枚の固定羽根を本発明の方法によって位置を固定し
た状態を、一部分は図２の平面Ｉ−Ｉで切った断面で示
した簡略正面図。FIG. 1 is a cross-sectional view taken along a plane II in FIG. 2, showing a state in which one fixed blade of a set of fixed blades of a stator diaphragm is fixed in position by the method of the present invention. FIG.

【図２】図１に示した固定羽根の一部分を図１の平面II
−IIで切った断面で示す略図。FIG. 2 shows a part of the fixed blade shown in FIG.
FIG.

【図３】固定羽根に関連して用いられる、ろう付け材料
で充填した空所を図１の矢印Ａの方向に見た略図。FIG. 3 is a schematic view of a cavity filled with a brazing material, which is used in connection with a fixed blade, as viewed in the direction of arrow A in FIG.

【符号の説明】[Explanation of symbols]

１０ ステータ・ダイアフラム １１ 羽根 １２，１３ リング １４、１４’ ろう付け材料 １５、１５’ 半径方向空所 Reference Signs List 10 Stator diaphragm 11 Blade 12, 13 Ring 14, 14 'Brazing material 15, 15' Radial void

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 蒸気タービン又はガス膨張器のステータ
・ダイアフラム（１０）を作る方法に於て、前記蒸気タ
ービン又はガス膨張器のステータ段の羽根（１１）の輪
郭を持っていて、該羽根（１１）を後で収容するのに適
した半径方向空所（１５、１５’）を得る為に別々に加
工された２つのリング（１２、１３）を用意する段階を
含み、ペースト状の適当量のろう付け材料（１４、１
４’）を前記空所（１５、１５’）に挿入し、前記ダイ
アフラム（１０）を真空中の炉内ろう付け作業にかける
ことを特徴とする方法。1. A method for making a stator diaphragm (10) for a steam turbine or gas expander, the method comprising the step of providing a profile of a blade (11) of a stator stage of the steam turbine or gas expander. 11) providing two separately machined rings (12, 13) to obtain radial cavities (15, 15 ') suitable for later containing, suitable amounts of paste Brazing material (14, 1
4 ') into said cavity (15, 15') and subjecting said diaphragm (10) to a furnace brazing operation in a vacuum. 【請求項２】 前記リング（１２、１３）を用意する段
階が、数値制御工作機械の助けを借りて、羽根（１１）
の輪郭を持つ前記半径方向空所（１５、１５’）を得る
為に、ウォータ・ジェット切削によって前記２つのリン
グ（１２、１３）を別々に加工することによって行われ
る請求項１記載の方法。2. The step of providing said ring (12, 13) comprises the step of providing a blade (11) with the aid of a numerically controlled machine tool.
2. The method according to claim 1, wherein the two rings (12, 13) are separately machined by water jet cutting in order to obtain the radial cavities (15, 15 ') having the following contours. 【請求項３】 前記リング（１２、１３）の空所（１
５、１５’）を用意する段階が、レーザによって前記空
所（１５、１５’）を切削することによって行われる請
求項１記載の方法。3. The space (1) in the ring (12, 13).
The method according to claim 1, wherein the step of providing (5, 15 ') is performed by cutting the cavity (15, 15') with a laser. 【請求項４】 前記リング（１２、１３）の空所（１
５、１５’）を用意する段階が、電子放電加工によって
前記空所（１５、１５’）を切削することによって行わ
れる請求項１記載の方法。4. The space (1) in the ring (12, 13).
The method according to claim 1, wherein the step of providing (5, 15 ') is performed by cutting the cavity (15, 15') by means of electro-discharge machining. 【請求項５】 ペースト状の前記ろう付け材料（１４、
１４’）が前記空所（１５、１５’）の中、並びに前記
羽根（１１）の輪郭と前記リング（１２、１３）の空所
（１５、１５’）の間の隙間に挿入される請求項１記載
の方法。5. The paste-like brazing material (14,
14 ') are inserted into the cavity (15, 15') and into the gap between the contour of the blade (11) and the cavity (15, 15 ') of the ring (12, 13). Item 7. The method according to Item 1. 【請求項６】 ろう付け作業の後、前記ダイアフラム
（１０）は最終寸法に従って加工されて、電子放電加工
又はレーザによって２つの半リングに切断され、前記蒸
気タービン又は前記ガス膨張器の内側ケース内に最終的
に取付けられる請求項１乃至５のいずれか１項に記載の
方法。6. After a brazing operation, the diaphragm (10) is machined according to final dimensions, cut into two half-rings by means of electronic discharge machining or a laser, and in the inner case of the steam turbine or the gas expander. A method according to any of the preceding claims, wherein the method is ultimately attached to a vehicle. 【請求項７】 前記ろう付け作業が真空中の炉内で行わ
れる請求項１乃至６のいずれか１項に記載の方法。7. The method according to claim 1, wherein the brazing operation is performed in a furnace in a vacuum. 【請求項８】 羽根（１１）の輪郭を持つと共に、該羽
根（１１）を後で収容するのに適した半径方向空所（１
５、１５’）を得る為に別々に加工された２つのリング
（１２、１３）を有し、ペースト状の適当量のろう付け
材料（１４、１４’）が前記空所（１５、１５’）内に
挿入されていることを特徴とするステータ・ダイアフラ
ム。8. A radial cavity (1) having the contour of the vane (11) and suitable for later accommodating the vane (11).
5, 15 ') with two rings (12, 13) machined separately to obtain a suitable amount of paste-like brazing material (14, 14') in said cavity (15, 15 '). A stator diaphragm characterized in that it is inserted into a).
JP2001117568A 2000-04-18 2001-04-17 Stator diaphragm for steam turbine and method of making it Pending JP2002038904A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000MI000870A IT1317277B1 (en) 2000-04-18 2000-04-18 PROCEDURE FOR THE REALIZATION OF A STATIC DIAPHRAGM IN A STEAM UNATURBINE AND STATIC DIAPHRAGM SO REALIZED.
IT2000A000870 2000-09-15

Publications (2)

Publication Number Publication Date
JP2002038904A true JP2002038904A (en) 2002-02-06
JP2002038904A5 JP2002038904A5 (en) 2008-05-29

Family

ID=11444884

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Country Status (8)

Country Link
EP (1) EP1148208B1 (en)
JP (1) JP2002038904A (en)
KR (1) KR100602283B1 (en)
CN (1) CN1316142C (en)
CZ (1) CZ299431B6 (en)
DE (1) DE60120549T2 (en)
IT (1) IT1317277B1 (en)
RU (1) RU2268371C2 (en)

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CZ299431B6 (en) 2008-07-23
DE60120549D1 (en) 2006-07-27
KR100602283B1 (en) 2006-07-14
ITMI20000870A0 (en) 2000-04-18
EP1148208A2 (en) 2001-10-24
CZ20011372A3 (en) 2001-12-12
EP1148208A3 (en) 2004-06-02
IT1317277B1 (en) 2003-05-27
EP1148208B1 (en) 2006-06-14
KR20010098577A (en) 2001-11-08
DE60120549T2 (en) 2007-06-06
ITMI20000870A1 (en) 2001-10-18
CN1318686A (en) 2001-10-24
CN1316142C (en) 2007-05-16
RU2268371C2 (en) 2006-01-20

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