JPH0712038A - Welded structure type stress reduced water turbine runner - Google Patents
Welded structure type stress reduced water turbine runnerInfo
- Publication number
- JPH0712038A JPH0712038A JP5150115A JP15011593A JPH0712038A JP H0712038 A JPH0712038 A JP H0712038A JP 5150115 A JP5150115 A JP 5150115A JP 15011593 A JP15011593 A JP 15011593A JP H0712038 A JPH0712038 A JP H0712038A
- Authority
- JP
- Japan
- Prior art keywords
- crown
- band
- vane
- joint
- welding
- 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
Links
Classifications
-
- 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
Landscapes
- Hydraulic Turbines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶接構造型水車ランナに
おいて、ベーンとクラウン及びバンドの溶接部の継手形
状を変化させ、接合部の応力集中を緩和させることによ
り、数十年に渡る長期使用を要求される水車ランナの溶
接部の強度を向上させ、信頼性を高めるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welded structure type water turbine runner, in which a joint shape of a welded portion of a vane, a crown and a band is changed to reduce stress concentration at the jointed portion, and thus long-term use for decades. It is intended to improve the strength of the welded portion of the water turbine runner, which enhances reliability.
【０００２】[0002]
【従来の技術】従来の水車ランナの溶接は、特開平1−1
70583 号公報のように、溶接方法をコントロールするこ
とにより、溶接継手部の強度を維持・向上させる手法が
一般的であった。ところが、継手形状そのものを変更す
ることにより溶接継手部の強度を維持・向上させる手法
については、最近までの水車ランナは一体型鋳鋼により
製作されていたこともあり、その形状をそのまま踏襲す
るのが安全ということで、ほとんど着目されていなかっ
た。2. Description of the Related Art Conventional welding of a water turbine runner is disclosed in Japanese Patent Laid-Open No. 1-1.
As in Japanese Patent No. 70583, a method of maintaining and improving the strength of a welded joint by controlling the welding method has been generally used. However, regarding the method of maintaining and improving the strength of the welded joint by changing the joint shape itself, water turbine runners until recently have been manufactured from monolithic cast steel, so that shape is followed as it is. Little attention was paid to safety.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、溶接構造型
水車ランナの溶接継手部の強度を、比較的割れの入りや
すいベーンとクラウン及びバンドの溶接始終端部での応
力集中を緩和することにより高めようとしている。SUMMARY OF THE INVENTION According to the present invention, the strength of a welded joint portion of a welded structure type water turbine runner is relieved of stress concentration at the beginning and end of welding of a vane, a crown and a band which are relatively susceptible to cracking. I am trying to raise it.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、溶接継手の形状を水車の性能には影響を与えない範
囲で変更することにより、比較的割れの入りやすいベー
ンとクラウン及びバンドの溶接始終端部での応力集中を
緩和することにより、溶接構造型水車ランナの溶接継手
部の強度を高める。In order to solve the above problems, the shape of the welded joint is changed within a range that does not affect the performance of the water turbine, so that the vane, the crown and the band which are relatively easily cracked can be formed. By relaxing the stress concentration at the start and end of welding, the strength of the welded joint of the welded structure type water turbine runner is increased.
【０００５】[0005]
【作用】溶接構造型水車ランナのベーンは、クラウン及
びバンドに溶接される際、ベーンの溶接始終端部それぞ
れの接合部に位置するＴ型形状の継手のフランジ側に相
当するクラウン及びバンドの板厚を、継手部の周辺のみ
接合部ではないクラウン及びバンドの板厚に比べて薄く
することにより、接合部の剛性を低下させ、ベーンとク
ラウン及びバンドの溶接始終端部での応力集中を緩和す
ることにより、溶接継手部の強度を高めることができ
る。When the vane of the welded structure type water turbine runner is welded to the crown and the band, the plate of the crown and the band corresponding to the flange side of the T-shaped joint located at the joint of each of the welding start and end portions of the vane. The thickness of the joint and joint is reduced by reducing the thickness compared to the thickness of the crown and band, which is not the joint only around the joint, to reduce the rigidity of the joint and reduce stress concentration at the beginning and end of welding of the vane, crown and band. By doing so, the strength of the welded joint can be increased.
【０００６】[0006]
【実施例】以下、本発明の実施例を説明する。EXAMPLES Examples of the present invention will be described below.
【０００７】図１は、本発明による溶接構造型水車ラン
ナのベーン１とクラウン２及びバンド３の溶接継手部の
断面図を示す。ベーン１の溶接始終端部ではクラウン２
及びバンド３の板厚を薄くしている。その際、クラウン
２及びバンド３の外側の加工部は、なだらかな削り加工
を施し、加工端部に新たな応力集中がでないようにして
いる。図２には、ベーン１の一枚を中心としたクラウン
２及びバンド３との接合部の位置関係を示す。図１と同
様に、継手の始終端部ではクラウン２及びバンド３の板
厚を薄くしている様子がわかる。図３には、従来のクラ
ウン５及びバンド６の構造により製作された溶接構造型
ランナの断面図を示す。ベーン４の溶接始終端部と中央
部では、クラウン５及びバンド６の板厚は変化していな
い。図３のクラウン５及びバンド６に比べて、図１，図
２に示すように、クラウン２及びバンド３の継手部での
板厚を薄くすることにより、接合部の剛性が小さくな
り、溶接による応力集中を抑えることができる。その結
果、溶接継手部の強度は向上し、水車ランナの耐用年数
は増大する。FIG. 1 is a sectional view of a welded joint portion of a vane 1, a crown 2 and a band 3 of a welded structure type water turbine runner according to the present invention. Crown 2 at the beginning and end of welding of vane 1
Also, the plate thickness of the band 3 is reduced. At this time, the processed parts on the outer sides of the crown 2 and the band 3 are subjected to a gentle shaving process so that no new stress concentration occurs at the processed ends. FIG. 2 shows the positional relationship of the joint portion with the crown 2 and the band 3 centering on one vane 1. Similar to FIG. 1, it can be seen that the plate thicknesses of the crown 2 and the band 3 are thinned at the start and end portions of the joint. FIG. 3 shows a cross-sectional view of a welded structure type runner manufactured by the conventional structure of the crown 5 and the band 6. The plate thicknesses of the crown 5 and the band 6 do not change between the welding start end portion and the center portion of the vane 4. As shown in FIGS. 1 and 2, as compared with the crown 5 and the band 6 in FIG. 3, by reducing the plate thickness at the joint portion of the crown 2 and the band 3, the rigidity of the joint is reduced, and Stress concentration can be suppressed. As a result, the strength of the welded joint is improved and the service life of the turbine runner is increased.
【０００８】図４には、ベーン１との溶接始終端部に相
当する位置以外の板厚を厚くしたクラウン７を示す。ク
ラウン７の板厚を、継手部の始終端部周辺８のみを残し
て溶接部の裏側から厚くすることにより、接合部での剛
性を相対的に低下させ、ベーン１とクラウン７の溶接始
終端部での溶接による応力集中を緩和することにより、
溶接継手部の強度を向上させることができる。また、バ
ンドとベーンの溶接部についても同様のことが言える。FIG. 4 shows a crown 7 having a thickened plate except for the positions corresponding to the start and end of welding with the vane 1. By increasing the plate thickness of the crown 7 from the back side of the welded portion, leaving only the periphery 8 of the joint end portion, the rigidity at the joint portion is relatively reduced, and the welding start and end points of the vane 1 and the crown 7 are reduced. By relaxing the stress concentration due to welding at the
The strength of the welded joint portion can be improved. The same applies to the welded portion between the band and the vane.
【０００９】図５には、ベーン９とクラウン１２を溶接
することにより溶接構造型水車ランナを製作する際に、
開先加工したベーン９の溶接始終端部それぞれの開先形
状の中で、溶接１１の前の初期状態でのクラウン１２と
の接合部１０の面積を、ベーン９の他の溶接箇所に比べ
て大きくした溶接継手を示す。接合部１０の面積を大き
くすることにより、溶接による未溶着部が残りやすくな
る。その結果、接合部の剛性は低下し、結果的にベーン
とクラウンの溶接始終端部での溶接による応力集中が緩
和され、溶接継手部の強度を向上することができる。ま
た、図６には、溶接中央部でのベーン１３とクラウン１
５の溶接部１１の断面を示す。初期接続部の面積は、溶
接始終端部の初期接続部に比べて小さくなっていること
がわかる。また、ベーンとバンドの関係についてもクラ
ウンとバンドの関係と同様のことが言える。In FIG. 5, when manufacturing a welded structure type turbine runner by welding the vane 9 and the crown 12,
In the groove shape of each of the welding start and end portions of the grooved vane 9, the area of the joint portion 10 with the crown 12 in the initial state before the welding 11 is larger than that of the other welded portions of the vane 9. The enlarged welded joint is shown. By increasing the area of the joint portion 10, an unwelded portion due to welding tends to remain. As a result, the rigidity of the joint is reduced, and as a result, stress concentration due to welding at the welding start and end portions of the vane and the crown is relaxed, and the strength of the welded joint can be improved. Further, in FIG. 6, the vane 13 and the crown 1 at the weld center portion are shown.
The cross section of the welded part 11 of 5 is shown. It can be seen that the area of the initial connection part is smaller than that of the initial connection part at the welding start and end parts. Also, the relationship between the vane and the band is the same as the relationship between the crown and the band.
【００１０】[0010]
【発明の効果】本発明により、溶接構造型水車ランナの
ベーンとクラウン及びバンドの接合部の剛性を低下さ
せ、ベーンとクラウン及びバンドの溶接始終端部での応
力集中を緩和することにより、溶接継手部の強度を高め
ることができる。According to the present invention, the rigidity of the joint portion between the vane, the crown and the band of the welded structure type water turbine runner is reduced, and the stress concentration at the welding start and end portions of the vane, the crown and the band is relaxed, and thus welding is performed. The strength of the joint portion can be increased.
【図１】本発明による溶接構造型水車ランナの断面図。FIG. 1 is a sectional view of a welded structure type turbine runner according to the present invention.
【図２】本発明による溶接構造型水車ランナのベーン一
枚に対するクラウン及びバンドの位置関係を示す断面
図。FIG. 2 is a sectional view showing a positional relationship between a crown and a band with respect to one vane of the welded structure type turbine runner according to the present invention.
【図３】従来のクラウン及びバンドの構造を用いて製作
された溶接構造型水車ランナの断面図。FIG. 3 is a cross-sectional view of a welded structure type water turbine runner manufactured using a conventional crown and band structure.
【図４】ベーンとの溶接始終端部以外の板厚を厚くした
クラウンの正面図。FIG. 4 is a front view of a crown having a thickened plate thickness other than a welding start / end portion with a vane.
【図５】本発明によるベーンの溶接始終端部と中央部の
断面図との比較説明図。FIG. 5 is a comparative explanatory view of cross-sectional views of a welding start and end portions and a central portion of a vane according to the present invention.
【図６】従来のベーンの溶接始終端部と中央部の断面図
との比較説明図。FIG. 6 is a comparative explanatory view of a cross-sectional view of a welding start end portion and a central portion of a conventional vane.
１…ベーン、２…クラウン、３…バンド。 1 ... Vane, 2 ... Crown, 3 ... Band.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂田 信二 茨城県土浦市神立町502番地 株式会社日 立製作所機械研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Sakata 502 Jinritsucho, Tsuchiura City, Ibaraki Prefecture Hiritsu Manufacturing Co., Ltd.
Claims (4)
とクラウン及びバンドを溶接することにより水車ランナ
を製作する際に、前記ベーンの溶接始終端部それぞれの
接合部に位置するＴ型形状の継手のフランジ側に相当す
る前記クラウン及び前記バンドの板厚を、継手部の周辺
のみ接合部ではない前記クラウン及び前記バンドの板厚
に比べて薄くすることを特徴とする水車ランナ。1. A welded structure type water turbine runner having a T-shaped joint located at the joint of each of the welding start and end portions of the vane when manufacturing the water turbine runner by welding a vane, a crown and a band. The water turbine runner is characterized in that the plate thickness of the crown and the band corresponding to the flange side of the is made thinner than the plate thickness of the crown and the band only at the periphery of the joint portion and not at the joint portion.
ウン及び前記バンドを溶接することにより溶接構造型水
車ランナを製作する際に、前記ベーンの溶接始終端部そ
れぞれの接合部に位置するＴ型形状の継手のフランジ側
に相当するクラウン及びバンドの板厚を、継手部の周辺
のみ溶接部の裏側から薄くする水車ランナ。2. The T-shape located at the joint of each of the weld start and end portions of the vane according to claim 1, when the welded structure type water turbine runner is manufactured by welding the vane, the crown and the band. A water turbine runner that reduces the plate thickness of the crown and band corresponding to the flange side of the shaped joint from the back side of the weld only around the joint.
ウン及び前記バンドを溶接することにより溶接構造型水
車ランナを製作する際に、前記ベーンの溶接始終端部そ
れぞれの接合部に位置するＴ型形状の継手のフランジ側
に相当するクラウン及びバンドの板厚を、継手部の周辺
のみを残して溶接部の裏側から厚くする水車ランナ。3. The T-shape located at the joint of each of the welding start and end portions of the vane according to claim 1, when manufacturing a welded structure type water turbine runner by welding the vane, the crown and the band. A water turbine runner that increases the plate thickness of the crown and band corresponding to the flange side of the shaped joint from the back side of the weld, leaving only the periphery of the joint.
ウン及び前記バンドを溶接することにより溶接構造型水
車ランナを製作する際に、開先加工した前記ベーンの溶
接始終端部それぞれの開先形状の中で、溶接前の初期状
態での前記クラウン及び前記バンドとの接合部の面積
を、前記ベーンの他の溶接箇所に比べて大きくする水車
ランナ。4. The groove shape of each of the welding start and end portions of the vane, which has been groove-processed, when manufacturing a welded structure type water turbine runner by welding the vane, the crown and the band. Among them, a water turbine runner in which an area of a joint portion between the crown and the band in an initial state before welding is made larger than that of other welded portions of the vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150115A JPH0712038A (en) | 1993-06-22 | 1993-06-22 | Welded structure type stress reduced water turbine runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150115A JPH0712038A (en) | 1993-06-22 | 1993-06-22 | Welded structure type stress reduced water turbine runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0712038A true JPH0712038A (en) | 1995-01-17 |
Family
ID=15489820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5150115A Pending JPH0712038A (en) | 1993-06-22 | 1993-06-22 | Welded structure type stress reduced water turbine runner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712038A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3003309A1 (en) * | 2013-03-18 | 2014-09-19 | Alstom Hydro France | FRANCIS TYPE WHEEL FOR A HYDRAULIC MACHINE, A HYDRAULIC MACHINE COMPRISING SUCH A WHEEL, AND AN ENERGY CONVERSION INSTALLATION COMPRISING SUCH A HYDRAULIC MACHINE |
-
1993
- 1993-06-22 JP JP5150115A patent/JPH0712038A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3003309A1 (en) * | 2013-03-18 | 2014-09-19 | Alstom Hydro France | FRANCIS TYPE WHEEL FOR A HYDRAULIC MACHINE, A HYDRAULIC MACHINE COMPRISING SUCH A WHEEL, AND AN ENERGY CONVERSION INSTALLATION COMPRISING SUCH A HYDRAULIC MACHINE |
| WO2014147026A1 (en) * | 2013-03-18 | 2014-09-25 | Alstom Renewable Technologies | Francis-type runner for a hydraulic machine, hydraulic machine equipped with such a runner and energy conversion plant comprising such a hydraulic machine |
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