JP2005146934A - Method for manufacturing runner - Google Patents

Method for manufacturing runner Download PDF

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Publication number
JP2005146934A
JP2005146934A JP2003383310A JP2003383310A JP2005146934A JP 2005146934 A JP2005146934 A JP 2005146934A JP 2003383310 A JP2003383310 A JP 2003383310A JP 2003383310 A JP2003383310 A JP 2003383310A JP 2005146934 A JP2005146934 A JP 2005146934A
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Prior art keywords
blade
crown
band
root
runner
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Koichiro Shimizu
光一郎 清水
Minoru Hoshi
穣 星
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Toshiba Corp
Toshiba Industrial Technology Corp
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Toshiba Corp
Toshiba Industrial Technology Corp
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    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Hydraulic Turbines (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for easily machining a water flow face of a crown or a band, and manufacturing a runner capable of obtaining a runner with high welding strength of a blade and the crown or the band. <P>SOLUTION: In this method for manufacturing a runner of a Franciss type water turbine or a pump water turbine, a crown 1, a band 3, and a plurality of blades 6 are separately manufactured, welded, and assembled. Stubs 2a, 2b including a blade base R part are installed to at least any of a blade inlet side tip and a blade outlet side tip in at least one of blade mounting parts of the crown and the blade. At a portion, where the stubs are installed, the stubs and the blades are welded. At a portion, where the stubs are not installed, the blade base R part is formed by welding, so as to joint the crown or the band and the blades. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、溶接組み立てによって製造されフランシス型の水車またはポンプ水車に備えられるランナの製造方法に関する。   The present invention relates to a method of manufacturing a runner manufactured by welding assembly and provided in a Francis type turbine or pump turbine.

従来のフランシス型の水車またはポンプ水車の溶接組み立てランナにおいては、製造方法をコントロールすることにより応力が高い領域の溶接継手部の強度を維持・向上させる方法が考案されている（下記特許文献１参照）。また、羽根とクラウンおよびバンドを溶接する際の羽根入口・出口側に相当する溶接始終端部の応力集中を低減する方法としては、羽根外径近傍のクラウンまたはバンドを部分的に厚みを薄くする方法が考案されている（下記特許文献２参照）。また、羽根とクラウンまたはバンドの継手部が高応力部位に相当するため、羽根長さ分の羽根付根Ｒ部分を含むスタブをクラウンまたはバンドに一体の鋳物として製造しておき、溶接部分が付根Ｒ部にならないように組み立てる方法が用いられている。
特開平１−１７０５８５号公報 特開平７−１２０３８号公報 In a conventional Francis-type water turbine or pump water turbine welded assembly runner, a method has been devised to maintain and improve the strength of a weld joint in a high stress region by controlling the manufacturing method (see Patent Document 1 below). ). Also, as a method of reducing the stress concentration at the welding start / end portion corresponding to the blade inlet / outlet side when welding the blade, crown, and band, the thickness of the crown or band near the blade outer diameter is partially reduced. A method has been devised (see Patent Document 2 below). Further, since the joint between the blade and the crown or the band corresponds to a high stress portion, a stub including the blade root R portion corresponding to the blade length is manufactured as a casting integrally with the crown or band, and the welded portion is the root R. The method of assembling so that it does not become a part is used.
JP-A-1-170585 Japanese Unexamined Patent Publication No. 7-12038

近年ポンプ水車の高落差化およびランナの軽量化が進められているため、ランナは相対的に高応力化の方向となる。従来技術において応力集中を低減する方法は一般的ではないため、羽根長さに相当するスタブを設けるか、スタブを用いない溶接による組み立てが一般的である。しかし、スタブを有するクラウンおよびバンドでは、スタブが流水面側にあるため、この部分の流水面形状加工をターニング加工することは不可能であることから、高コスト、製造期間の長期化という問題がある。   In recent years, the height of the pump turbine has been increased and the weight of the runner has been reduced. Therefore, the runner has a relatively high stress. In the prior art, a method for reducing the stress concentration is not general. Therefore, a stub corresponding to the blade length is provided, or assembly by welding without using a stub is generally used. However, in the crown and band having a stub, since the stub is on the flow surface side, it is impossible to turn the flow surface shape processing of this portion, so there is a problem of high cost and a long manufacturing period. is there.

羽根長さに相当するスタブを設ける方法は図８に示すようになるが、クラウン１の流水面のターニング加工はスタブ２から外れた外側と内側のわずかな領域でしかなく、複数ある羽根に対応した複数のスタブ２間の流水面加工は、ガウジングやグラインダーによる手仕上げ、あるいは高コスト、長時間を要するＮＣ加工などによる方法となり、加工時間がかかるとともに加工コストが高くなってしまう。   The method of providing the stub corresponding to the blade length is as shown in FIG. 8, but the turning process of the flow surface of the crown 1 is only a small area outside and inside the stub 2 and corresponds to a plurality of blades. The flowing water surface processing between the plurality of stubs 2 becomes a method by hand finishing by gouging or grinder, or NC processing which requires high cost and a long time, and it takes processing time and increases processing cost.

また、スタブを設けず、溶接のみの場合においては、羽根とクラウンおよびバンドとの溶接継手部は強度を確保するために付根Ｒ形状としているが、一般に溶接量を適正化するために羽根面側溶接止端部と羽根付根Ｒ止端部がほぼ一致した位置となるケースが多い。従来は図９の例に示すように、羽根面側溶接止端部は溶接量を適正化するために羽根付根Ｒ止端部とほぼ同等の高さ位置としている。   In addition, in the case of welding only without providing a stub, the welded joint portion of the blade, the crown, and the band has a root R shape in order to ensure the strength, but generally the blade surface side to optimize the welding amount In many cases, the weld toe and the blade root R toe are in a substantially coincident position. Conventionally, as shown in the example of FIG. 9, the blade face side welding toe portion has a height position substantially equal to the blade root R toe end portion in order to optimize the welding amount.

また、スタブにおいても、スタブの高さは羽根付根Ｒ止端部とする場合が多い。ところが、一般的に母材と溶接金属の境界である溶接境界部（以下、溶接ＨＡＺ部と記す）は耐衝撃性が低くまた、羽根付根Ｒ止端部は、最大応力よりは低下するものの、まだ、応力の高い領域であること、かつ溶接止端部は溶接によるアンダーカットが出やすいことから、アンダーカット部を滑らかな凹形状に修正しても強度上問題ないように付根Ｒ止端部近傍の羽根厚さは予め厚くしたり、耐衝撃値などの材料特性上から将来割れなどが出ないように、特別の非破壊検査を行う必要があるなどの問題がある。   Moreover, also in the stub, the height of the stub is often the blade root R toe. However, the weld boundary portion (hereinafter referred to as a welded HAZ portion) that is generally a boundary between the base metal and the weld metal has low impact resistance, and the blade root R toe portion is lower than the maximum stress, Root R toe so that there is no problem in strength even if the undercut part is modified to a smooth concave shape because it is a high stress area and the weld toe part is easily undercut by welding. There is a problem that the thickness of the blades in the vicinity is increased in advance, or special nondestructive inspection is required to prevent future cracks due to material properties such as impact resistance.

そこで本発明は、クラウンまたはバンドの流水面の機械加工が行いやすく、羽根とクラウンまたはバンドとの溶接強度の高いランナを得ることのできるランナの製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a method for manufacturing a runner that can easily perform machining of a flowing water surface of a crown or a band and can obtain a runner having high welding strength between a blade and a crown or a band.

請求項１の発明は、クラウン、バンドおよび複数の羽根を別々に製作の上、溶接組み立てするフランシス型の水車またはポンプ水車のランナの製造方法において、前記クラウンまたはバンドの少なくとも一方の前記羽根取付部のうち、羽根入口側先端または羽根出口側先端の少なくともいずれかに羽根付根Ｒ部を含んだスタブを設け、該スタブの設けられた部分については当該スタブと前記羽根とを溶接するとともに、前記スタブの設けられていない部分については溶接によって前記羽根付根Ｒ部を形成して前記クラウンまたは前記バンドと前記羽根とを接合することを特徴とする。   The invention according to claim 1 is a method of manufacturing a runner of a Francis type turbine or pump turbine in which a crown, a band, and a plurality of blades are separately manufactured and welded and assembled. Among them, a stub including a blade root R portion is provided at at least one of the blade inlet-side tip and the blade outlet-side tip, and the stub and the blade are welded to a portion where the stub is provided. As for the part where the blade is not provided, the blade root R portion is formed by welding, and the crown or the band and the blade are joined.

請求項２の発明は、前記スタブのクラウンまたはバンドからの高さを羽根側の付根Ｒ部開始点より高くし、羽根との溶接部分が付根Ｒ部領域から離れた位置になるようにすることを特徴とする。   In the invention of claim 2, the height of the stub from the crown or band is made higher than the root R portion start point on the blade side so that the welded portion with the blade is located away from the root R region. It is characterized by.

請求項３の発明は、前記スタブの高さを、羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上の高さとすることを特徴とする。
請求項４の発明は、クラウン、バンドおよび複数の羽根を別々に製作の上、溶接組み立てするフランシス型の水車またはポンプ水車のランナの製造方法において、前記クラウンまたはバンドの少なくとも一方の羽根取付部のうち、羽根入口側先端または羽根出口側先端の少なくともいずれかの溶接開先を、羽根面側溶接止端部が羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上羽根中心側になる形状として前記クラウンまたはバンドと前記羽根とを溶接することを特徴とする。 The invention of claim 3 is characterized in that the height of the stub is 0.3 times or more the root R value of the blade root R toe.
According to a fourth aspect of the present invention, there is provided a method for manufacturing a runner of a Francis type turbine or a pump turbine in which a crown, a band, and a plurality of blades are separately manufactured and assembled by welding. Among them, at least one of the blade inlet side tip or the blade outlet side tip is welded to the blade center side at the blade surface side weld toe portion 0.3 times the root R value or more than the blade root R toe portion. The crown or band and the blade are welded as a shape to be formed.

請求項５の発明は、前記羽根のクラウン側またはバンド側溶接開先の開先高さを、羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上羽根中心側になる高さとすることを特徴とする。   In a fifth aspect of the present invention, the height of the crown-side or band-side welding groove of the blade is set to a height that is at least 0.3 times the root R value of the blade root R toe and is on the blade center side. It is characterized by that.

本発明のランナの製造方法によれば、クラウンまたはバンドの流水面の機械加工が行いやすく、羽根とクラウンまたはバンドとの溶接強度の高いランナを得ることができる。   According to the runner manufacturing method of the present invention, it is easy to machine the flow surface of the crown or band, and a runner having high welding strength between the blade and the crown or band can be obtained.

以下、本発明の第１〜第６の実施例を図面を参照して説明する。   Hereinafter, first to sixth embodiments of the present invention will be described with reference to the drawings.

図１は本発明の第１の実施例のランナの製造方法を示し、クラウン１の流水面側の羽根取付部の入口側と出口側に、羽根付根Ｒを有するスタブ２ａ，２ｂをそれぞれ設けるものである。このとき、これらのスタブ２ａ，２ｂの羽根先端からの長さは、羽根厚さの１．５倍から５倍の範囲とすることが好ましい。そして、スタブ２ａ，２ｂの設けられていない羽根中央付近については、溶接にてクラウンと羽根を接合する際に羽根付根Ｒ部を形成するようにする。   FIG. 1 shows a runner manufacturing method according to a first embodiment of the present invention, in which stubs 2a and 2b having blade roots R are respectively provided on the inlet side and the outlet side of the blade mounting portion on the water surface side of the crown 1. It is. At this time, the length of the stubs 2a and 2b from the blade tip is preferably in the range of 1.5 to 5 times the blade thickness. And about the blade | wing center vicinity in which the stub 2a, 2b is not provided, when joining a crown and a blade | wing by welding, a blade root R part is formed.

この実施例の製造方法は、特に応力の高い羽根入口および出口端側にのみにスタブ２ａおよびスタブ２ｂを設けるものであり、スタブ２ａ，２ｂのない流水面に関してはターニング加工を行うことができ、スタブ２ａ，２ｂのある流水面についてはスタブの長さが短いため、外周側または内周側などからのエンドミルなどによる加工を行うことができる。そのため加工コスト増加を抑えることができる。また、スタブ２ａ，２ｂは羽根付根Ｒを含む構造であるため、高応力部位の品質を高めることが可能で溶接によるアンダーカットや金属疲労欠陥からの割れの発生を抑制することができる。   In the manufacturing method of this embodiment, the stub 2a and the stub 2b are provided only on the blade inlet and outlet end sides having particularly high stress, and the turning process can be performed on the flowing water surface without the stubs 2a and 2b. Since the length of the stub is short on the flowing water surface with the stubs 2a and 2b, it can be processed by an end mill from the outer peripheral side or the inner peripheral side. Therefore, an increase in processing cost can be suppressed. Further, since the stubs 2a and 2b have a structure including the blade root R, it is possible to improve the quality of the high stress portion and to suppress the occurrence of cracks due to undercut or metal fatigue defects due to welding.

図２は本発明の第２実施例を示し、第１の実施例で示した入口側スタブ２ａの高さを羽根付根Ｒ止端部より高くするものである。この場合は、図３に示すように付根Ｒ部の応力レベルを測定した結果例において、図中（I）方向のＲの中心付近で最も高く、それから離れていくにしたがって応力が低下する傾向を示しているが、付根Ｒ止端部においてもまだ応力が高い状態にある。したがって通常は問題がないが、溶接の止端部がちょうどこの位置にある形状にした場合、母材の溶接境界に溶接ＨＡＺ部が形成されているために、溶接によるアンダーカット（凹部）が生じやすく、そのままでは応力集中が生じてしまうことと、この溶接ＨＡＺ部の特性として、一般的に耐衝撃性が低いことから、アンダーカットや将来生じる可能性のある金属疲労欠陥からの割れが発生しやすくなるため、この溶接ＨＡＺ部をより作用応力の低い、できるだけ羽根側にすることによりアンダーカットや金属疲労欠陥からの割れの発生を抑制することができる。   FIG. 2 shows a second embodiment of the present invention, in which the height of the inlet side stub 2a shown in the first embodiment is made higher than the blade root R toe. In this case, in the example of the result of measuring the stress level of the root R portion as shown in FIG. 3, the stress tends to be the highest near the center of R in the direction (I) in the figure, and the stress decreases as the distance from the center increases. As shown, the stress is still high at the root R toe. Therefore, there is usually no problem, but when the weld toe is in this shape, the weld HAZ part is formed at the weld boundary of the base material, so an undercut (recess) is generated by welding. It is easy to cause stress concentration as it is, and the characteristic of this welded HAZ part is generally low impact resistance, so undercuts and cracks from metal fatigue defects that may occur in the future occur. Therefore, it is possible to suppress the occurrence of cracks due to undercuts and metal fatigue defects by making the welded HAZ part as low as possible on the blade side as much as possible.

図４は本発明の第３の実施例を示し、特に羽根枚数が多くかつ出口開度が狭く溶接性の悪い場合に、羽根出口端から外側に隣接する羽根面で形成する出口開度が最小となる位置を起点として、その羽根の上流側に出口開度最小値Ａの２〜５倍の長さＬの範囲までに、クラウン１の流水面に出口端から羽根付根Ｒを含むスタブ２ｃを設けるものである。この場合は狭い範囲にスタブ２ｃを設けることから溶接作業性が維持され、出口側の高応力部についても品質を高めることが可能で、溶接によるアンダーカットや金属疲労欠陥からの割れの発生を抑制することができる。   FIG. 4 shows a third embodiment of the present invention. In particular, when the number of blades is large and the outlet opening is narrow and the weldability is poor, the outlet opening formed on the blade surface adjacent to the outside from the blade outlet end is minimum. The stub 2c including the blade root R from the outlet end to the flowing water surface of the crown 1 within the range of the length L that is 2 to 5 times the outlet opening minimum value A on the upstream side of the blade. It is provided. In this case, welding workability is maintained because the stub 2c is provided in a narrow range, and it is possible to improve the quality of the high-stress part on the outlet side as well, suppressing the occurrence of cracks due to undercuts and metal fatigue defects due to welding. can do.

また、図示しないが、上記起点より羽根出口側にスタブを設けない場合については、溶接開先を羽根裏面側（ランナ中心側）からの片側開先とすることで溶接の作業性を維持することができる。   Moreover, although not shown in figure, about the case where a stub is not provided in the blade | wing exit side from the said starting point, maintain workability | operativity of welding by making a welding groove into the one side groove | channel from a blade | wing back surface side (runner center side). Can do.

図５は本発明の第４の実施例を示し、前記スタブ２ａまたは２ｂまたは２ｃの高さを羽根付根Ｒ止端部よりも０．３Ｒ値以上羽根側となるようにするものである。この場合も図３に示したように、羽根母材と溶接金属の境界部である溶接ＨＡＺ部が羽根付根Ｒ止端部から外れた応力の低い位置となるために、溶接ＨＡＺ部のアンダーカットや金属疲労欠陥などからの割れの発生を抑制することができ、品質を向上させることができる。   FIG. 5 shows a fourth embodiment of the present invention, in which the height of the stub 2a, 2b or 2c is 0.3R or more from the blade root R toe. Also in this case, as shown in FIG. 3, the weld HAZ portion, which is the boundary between the blade base material and the weld metal, is located at a low stress position away from the blade root R toe, so the undercut of the weld HAZ portion It is possible to suppress the occurrence of cracks from metal fatigue defects and the like, and to improve the quality.

上記第１から第４の実施例においては、フランシス型水車またはポンプ水車の溶接ランナにおいて、高応力部位のみに限定したスタブ方式とすることによって、クラウンまたはバンドの流水面全面を容易に設計形状に近い加工面とすることができるとともに、溶接ＨＡＺ部を高応力部位から外すことによって設計肉厚を薄くすることができる。また、溶接ＨＡＺ部が低応力部位に位置することから、多少のアンダーカットは滑らかな凹形状に修正する必要がなく、ランナの重量低減と大幅な加工期間の短縮になる。さらに、羽根間隔の狭いランナにおいても溶接作業性が向上するためコスト低減につながり、かつ信頼性の高いランナの提供が可能となる。   In the first to fourth embodiments described above, in the welding runner of the Francis type turbine or the pump turbine, the stub method limited to only the high stress portion is used, so that the entire flow surface of the crown or the band can be easily designed. While being able to make it a near processing surface, a design wall thickness can be made thin by removing welding HAZ part from a high stress site | part. In addition, since the welded HAZ portion is located at a low stress site, it is not necessary to correct some undercuts to a smooth concave shape, resulting in a reduction in runner weight and a significant reduction in processing time. Furthermore, since the welding workability is improved even in a runner having a narrow blade interval, the cost can be reduced and a highly reliable runner can be provided.

図６は本発明の第５の実施例を示し、スタブを設けない場合のフランシス型溶接組み立てランナにおいて、羽根入口先端あるいは出口先端から羽根肉厚の１．５から５倍の範囲で、バンド３に溶接するためのバンド側羽根溶接開先４を、羽根面側溶接止端部が羽根付根Ｒ止端部よりも０．３Ｒ値以上羽根側となるようにするものである。   FIG. 6 shows a fifth embodiment of the present invention. In the Francis-type welded assembly runner without a stub, the band 3 is in the range of 1.5 to 5 times the blade thickness from the blade inlet tip or outlet tip. The blade side blade welding groove 4 for welding to the blade side is such that the blade surface side welding toe portion is on the blade side by 0.3R value or more than the blade root R toe end portion.

本実施例ではバンド流水面はターニング加工可能で加工コストを抑えることができ、また、図３に示したように羽根母材と溶接金属の境界部である溶接ＨＡＺ部が羽根付根Ｒ止端部から外れた応力の低い位置となるため、溶接ＨＡＺ部に起因するアンダーカットや金属疲労欠陥などからの割れの発生を抑制することができ、信頼性の高いランナを得ることができる。   In this embodiment, the flow surface of the band can be turned to reduce the processing cost, and the welded HAZ portion, which is the boundary between the blade base material and the weld metal as shown in FIG. Therefore, the occurrence of cracks due to undercuts or metal fatigue defects caused by the welded HAZ portion can be suppressed, and a highly reliable runner can be obtained.

図７は本発明の第６の実施例を示し、バンド３に溶接するための羽根バンド側開先５の高さを予め羽根付根Ｒ止端部よりも付根値Ｒの０．３倍以上羽根中心側になるような高さとするものである。この場合も溶接ＨＡＺ部を羽根付根Ｒ止端部から外れた応力の低い位置とすることができるために、アンダーカットや金属疲労欠陥などからの割れの発生を抑制することができ、信頼性の高いランナを得ることができる。
なお上記各実施例において、クラウン１とあるところをバンド３とし、あるいはバンド３とあるところをクラウン１としても同様の作用効果が得られる。 FIG. 7 shows a sixth embodiment of the present invention. The height of the blade band groove 5 for welding to the band 3 is 0.3 times the root value R of the blade root R toe in advance. The height is such that it is on the center side. In this case as well, since the welded HAZ part can be placed at a low stress position away from the blade root R toe part, it is possible to suppress the occurrence of cracks from undercuts, metal fatigue defects, etc. A high runner can be obtained.
In each of the above embodiments, the same operation and effect can be obtained even if the portion where the crown 1 is located is the band 3 or the portion where the band 3 is located is the crown 1.

本発明の第１の実施例を示す断面図。Sectional drawing which shows the 1st Example of this invention. 本発明の第２の実施例を示す断面図。Sectional drawing which shows the 2nd Example of this invention. 本発明の第２の実施例において羽根先端付根Ｒ部に発生する応力分布を説明し、（ａ）は要部の形状を示す図、（ｂ）は応力比を示すグラフ。The stress distribution which generate | occur | produces in the blade tip root R part in 2nd Example of this invention is demonstrated, (a) is a figure which shows the shape of the principal part, (b) is a graph which shows stress ratio. 本発明の第３の実施例を示す平面図。The top view which shows the 3rd Example of this invention. 本発明の第４の実施例を示す断面図。Sectional drawing which shows the 4th Example of this invention. 本発明の第５の実施例を示す断面図。Sectional drawing which shows the 5th Example of this invention. 本発明の第６の実施例を示す断面図。Sectional drawing which shows the 6th Example of this invention. クラウン側にスタブを設ける従来例を示す断面図。Sectional drawing which shows the prior art example which provides a stub in the crown side. 羽根とバンドの溶接結合の従来例を示す断面図。Sectional drawing which shows the prior art example of the welding coupling | bonding of a blade | wing and a band.

符号の説明Explanation of symbols

１…クラウン、２…スタブ、２ａ…入口側スタブ、２ｂ，２ｃ…出口側スタブ、３…バンド、４，５…開先、６…羽根。   DESCRIPTION OF SYMBOLS 1 ... Crown, 2 ... Stub, 2a ... Inlet side stub, 2b, 2c ... Outlet side stub, 3 ... Band, 4, 5 ... Groove, 6 ... Blade | wing.

Claims (5)

クラウン、バンドおよび複数の羽根を別々に製作の上、溶接組み立てするフランシス型の水車またはポンプ水車のランナの製造方法において、前記クラウンまたはバンドの少なくとも一方の前記羽根取付部のうち、羽根入口側先端または羽根出口側先端の少なくともいずれかに羽根付根Ｒ部を含んだスタブを設け、該スタブの設けられた部分については当該スタブと前記羽根とを溶接するとともに、前記スタブの設けられていない部分については溶接によって前記羽根付根Ｒ部を形成して前記クラウンまたは前記バンドと前記羽根とを接合することを特徴とするランナの製造方法。   In a method for manufacturing a runner of a Francis type turbine or pump turbine in which a crown, a band, and a plurality of blades are separately manufactured and assembled by welding, a blade inlet-side tip of at least one of the blade mounting portions of the crown or band Alternatively, a stub including a blade root R portion is provided at at least one of the blade outlet side tips, and a portion where the stub is provided is welded to the stub and a portion where the stub is not provided. A method of manufacturing a runner, wherein the blade root R portion is formed by welding to join the crown or the band and the blade. 前記スタブのクラウンまたはバンドからの高さを羽根側の付根Ｒ部開始点より高くし、羽根との溶接部分が付根Ｒ部領域から離れた位置になるようにすることを特徴とする請求項１に記載のランナの製造方法。   The height from the crown or band of the stub is made higher than the root R portion start point on the blade side so that the welded portion with the blade is located away from the root R region. A method for producing a runner according to claim 1. 前記スタブの高さを、羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上の高さとすることを特徴とする請求項２に記載のランナの製造方法。   The runner manufacturing method according to claim 2, wherein the height of the stub is set to be 0.3 times or more the root R value of the blade root R toe. クラウン、バンドおよび複数の羽根を別々に製作の上、溶接組み立てするフランシス型の水車またはポンプ水車のランナの製造方法において、前記クラウンまたはバンドの少なくとも一方の羽根取付部のうち、羽根入口側先端または羽根出口側先端の少なくともいずれかの溶接開先を、羽根面側溶接止端部が羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上羽根中心側になる形状として前記クラウンまたはバンドと前記羽根とを溶接することを特徴とするランナの製造方法。   In a method of manufacturing a runner for a Francis type turbine or pump turbine in which a crown, a band, and a plurality of blades are separately manufactured and assembled by welding, a tip of a blade inlet side of at least one blade mounting portion of the crown or band or The crown or band is formed such that at least one of the welding outlets at the tip of the blade outlet side has a shape in which the blade surface side welding toe portion is 0.3 times the root R value of the blade root R toe portion or more and the blade center side. The runner is manufactured by welding the blade and the blade. 前記羽根のクラウン側またはバンド側溶接開先の開先高さを、羽根付根Ｒ止端部よりも付根Ｒ値の０．３倍以上羽根中心側になる高さとすることを特徴とする請求項４に記載のランナの製造方法。

The groove height of the blade-side or groove-side welding groove of the blade is set to a height that is 0.3 times or more the root R value of the blade root R toe and is on the blade center side. 4. The method for producing a runner according to 4.

JP2003383310A 2003-11-13 2003-11-13 Method for manufacturing runner Pending JP2005146934A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008034492A1 (en) * 2006-09-22 2008-03-27 Voith Siemens Hydro Power Generation Gmbh & Co. Kg Method for producing the rotor of a water turbine, and rotor
US20110206518A1 (en) * 2008-09-05 2011-08-25 Alstom Hydro France Francis-type runner for a hydraulic machine, hydraulic machine including such a runner, and method for assembling such a runner
CN103418993A (en) * 2013-07-22 2013-12-04 浙江迅和机械制造有限公司 Machining technology of top cover of large water guide mechanism
CN103939259A (en) * 2013-01-22 2014-07-23 株式会社东芝 Hydraulic turbine runner or pump turbine runner and manufacturing method thereof
CN113074072A (en) * 2020-01-06 2021-07-06 株式会社东芝 Francis turbine impeller and Francis turbine
CN113330210A (en) * 2019-01-14 2021-08-31 福伊特专利有限公司 Method for producing a radial flow rotor and rotor produced

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008034492A1 (en) * 2006-09-22 2008-03-27 Voith Siemens Hydro Power Generation Gmbh & Co. Kg Method for producing the rotor of a water turbine, and rotor
US20110206518A1 (en) * 2008-09-05 2011-08-25 Alstom Hydro France Francis-type runner for a hydraulic machine, hydraulic machine including such a runner, and method for assembling such a runner
US9175662B2 (en) * 2008-09-05 2015-11-03 Alstom Renewable Technologies Francis-type runner for a hydraulic machine, hydraulic machine including such a runner, and method for assembling such a runner
CN103939259A (en) * 2013-01-22 2014-07-23 株式会社东芝 Hydraulic turbine runner or pump turbine runner and manufacturing method thereof
CN103418993A (en) * 2013-07-22 2013-12-04 浙江迅和机械制造有限公司 Machining technology of top cover of large water guide mechanism
CN113330210A (en) * 2019-01-14 2021-08-31 福伊特专利有限公司 Method for producing a radial flow rotor and rotor produced
CN113074072A (en) * 2020-01-06 2021-07-06 株式会社东芝 Francis turbine impeller and Francis turbine
JP2021110246A (en) * 2020-01-06 2021-08-02 株式会社東芝 Runner for francis type water wheel, and francis type water wheel
US11566595B2 (en) 2020-01-06 2023-01-31 Kabushiki Kaisha Toshiba Francis-type turbine runner and Francis-type turbine
JP7269187B2 (en) 2020-01-06 2023-05-08 株式会社東芝 Runner for Francis turbine and Francis turbine

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