JPH0339195B2 - - Google Patents
Info
- Publication number
- JPH0339195B2 JPH0339195B2 JP58178419A JP17841983A JPH0339195B2 JP H0339195 B2 JPH0339195 B2 JP H0339195B2 JP 58178419 A JP58178419 A JP 58178419A JP 17841983 A JP17841983 A JP 17841983A JP H0339195 B2 JPH0339195 B2 JP H0339195B2
- Authority
- JP
- Japan
- Prior art keywords
- runner
- crown
- blade
- band
- manufacturing
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 12
- 230000007547 defect Effects 0.000 description 7
- 238000003466 welding Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はポンプ、水車またはポンプ水車などの
水力機械に適用されるフランシス型ランナの製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a Francis-type runner applied to a hydraulic machine such as a pump, a water turbine, or a pump-turbine.
一般にフランシス型ランナは、第１図に示すよ
うに、回転軸心１のまわりに回転するランナクラ
ウン２と、これに固定され円形翼列状に配置され
た複数枚のランナ羽根３と、前記ランナクラウン
２と対向する側に配置されランナ羽根を固定する
ランナバンド４とから構成されている。この種の
ランナは鋳造法によつて製造されることが多く、
鋳造法によるときには加工性の悪い材料や溶接性
の悪い材料であつても容易に成型できる反面、鋳
造欠陥を避けることができないという問題を有し
ている。すなわち、第３図に明示したように、ラ
ンナクラウン２とランナ羽根３との結合部の隅や
ランナバンド４とランナ羽根３との結合部の隅に
は高温割れ５が発生しやすく、またＴ字状の結合
部の中心には引け巣６が発生する。これらの欠陥
は液体浸透探傷法や超音波探傷法等の非破壊検査
法によつて検出し、欠陥部を溶接によつて補修し
ているのが実情であるが、必ずしも全ての鋳造欠
陥部を十分な郷土を与えた状態で補修できるわけ
ではない。しかるに、ランナ羽根３のランナクラ
ウン２やランナバンド４に対する付け根の部分は
水車運転時やポンプ運転時の水圧によつて発生す
る応力が大きい部分でもあるから、鋳造欠陥を放
置することはできない。
Generally, a Francis type runner includes a runner crown 2 that rotates around a rotation axis 1, a plurality of runner blades 3 fixed to the runner crown 2 and arranged in a circular row of blades, and a runner crown 2, as shown in FIG. It is composed of a runner band 4 arranged on the side facing the crown 2 and fixing the runner blades. This type of runner is often manufactured using the casting method.
When using the casting method, even materials with poor workability or poor weldability can be easily molded, but there is a problem in that casting defects cannot be avoided. That is, as clearly shown in FIG. 3, hot cracks 5 are likely to occur at the corners of the joint between the runner crown 2 and the runner blade 3, and at the corners of the joint between the runner band 4 and the runner blade 3, and the T A shrinkage cavity 6 is generated at the center of the letter-shaped joint. The reality is that these defects are detected using nondestructive testing methods such as liquid penetrant testing and ultrasonic testing, and the defective parts are repaired by welding, but it is not always possible to detect all casting defects. It is not possible to repair the area while preserving the local area. However, since the root portions of the runner blades 3 relative to the runner crown 2 and the runner band 4 are areas where stress is large due to water pressure during water turbine operation or pump operation, casting defects cannot be left untreated.
そこで、本発明の目的は上記鋳造成型によるフ
ランシス型ランナの製造方法の問題点を解決し、
生産性が高く、かつ、ランナクラウンおよびラン
ナバンドに対するランナ羽根の付け根の部分の強
度を確保し信頼性の高いフランシス型ランナの製
造方法を提供することにある。
SUMMARY OF THE INVENTION Therefore, the purpose of the present invention is to solve the problems of the method for manufacturing Francis-type runners by casting,
To provide a method for manufacturing a Francis type runner which is highly productive, secures the strength of the root portion of a runner blade with respect to a runner crown and a runner band, and is highly reliable.
上記目的を達成するために、本発明は、ランナ
クラウンとランナバンドとの間に複数枚のランナ
羽根を挟持してなるフランシス型ランナの製造方
法において、ランナを一体鋳造したのち、ランナ
クラウンおよびランナバンドに対するランナ羽根
３の付け根の部分のうち高い応力が発生する部位
を除去し、その部分に溶接等の溶接金属あるいは
別途の方法で製造された金属材料を埋設するよう
にしたことを特徴とするものである。
In order to achieve the above object, the present invention provides a method for manufacturing a Francis type runner in which a plurality of runner blades are sandwiched between a runner crown and a runner band, in which the runner is integrally cast, and then the runner crown and runner It is characterized in that a part of the base of the runner blade 3 relative to the band where high stress occurs is removed, and welded metal such as welding or a metal material manufactured by a separate method is buried in that part. It is something.
以下本発明によるフランシス型ランナの製造方
法を図面を参照して説明する。
A method of manufacturing a Francis type runner according to the present invention will be explained below with reference to the drawings.
フランシス型ランナは、第４図に示すように、
回転軸心１のまわりに回転するランナクラウン２
と、これに固定され円形整列状に配置された複数
枚のランナ羽根３と、前記ランナクラウン２と対
向する側に配置され、ランナ羽根を固定するラン
ナバンド４とから構成されている。このランナを
製造するには、先ず従来と同様、鋳造法により一
体的に製造する。ランナ羽根３は、第５図に示し
たように、例えば６枚のランナ羽根３が回転軸心
１に関してうず巻状に等間隔をおいて配置されて
いる。第４図に示されたように、各ランナ羽根３
のランナクラウン２あるいはランナバンド４に対
する付け根を羽根出口端（目盛０）から羽根入口
端（目盛10）までを羽根に沿つて10等分し位置配
分した場合、クラウン側では5.5から9.0までの範
囲、またバンド側では6.5から9.0までの範囲が応
力レベルの高い範囲であることが確認されている
（特開昭53−118641号公報参照）。そこで、本発明
では、この領域を例えばハツリ作業によつて部分
的に除去する。この除去した部分が第５図におい
て符号７で示されている。この部分に鋳造欠陥が
存在している確率が高いことは多くの過去の製造
実績によつて確認されている。上記部分７を除去
する手段は、ハツリ作業によつて除去することの
ほか、鋳造の段階でこの部分７にあらかじめ鋳抜
き孔が形成されるようにしておいてもよい。 The Francis type runner, as shown in Figure 4,
Runner crown 2 rotating around rotation axis 1
, a plurality of runner blades 3 fixed thereto and arranged in a circular arrangement, and a runner band 4 arranged on the side facing the runner crown 2 and fixing the runner blades. In order to manufacture this runner, first, it is manufactured in one piece by a casting method as in the prior art. As shown in FIG. 5, the runner blades 3 include, for example, six runner blades 3 arranged in a spiral shape with respect to the rotation axis 1 at equal intervals. As shown in FIG. 4, each runner blade 3
If the base of the runner crown 2 or runner band 4 is divided into 10 equal parts along the blade from the blade outlet end (scale 0) to the blade inlet end (scale 10) and distributed, the range on the crown side is from 5.5 to 9.0. It has also been confirmed that on the band side, the range from 6.5 to 9.0 is a high stress level range (see Japanese Patent Laid-Open No. 118641/1983). Therefore, in the present invention, this area is partially removed by, for example, chiseling. This removed portion is indicated by the reference numeral 7 in FIG. It has been confirmed by many past manufacturing results that there is a high probability that casting defects exist in this part. The means for removing the portion 7 may be by chiseling, or a hole may be formed in advance in the portion 7 at the casting stage.
そして、上記除去部分７に対して溶接により溶
接金属を埋設する。次いで溶接終了後、応力除去
焼鈍を施し溶接による残留応力を除去し歪および
割れ防止を行なう。このような作業を６個のラン
ナ羽根３のそれぞれに対して同様に行なう。 Then, weld metal is buried in the removed portion 7 by welding. After welding is completed, stress relief annealing is performed to remove residual stress caused by welding and prevent distortion and cracking. This operation is similarly performed for each of the six runner blades 3.
このようにランナ羽根の付け根であつて使用時
に高い応力の発生が予想される部位をあらかじめ
除去し、この除去した部分を溶接金属等で埋設す
ることにより鋳造欠陥を除去して強度を高めるこ
とができるのである。 In this way, by removing the base of the runner blade where high stress is expected to occur during use, and burying this removed part with welded metal, etc., it is possible to remove casting defects and increase strength. It can be done.
以上の説明から明らかなように、本発明によれ
ば、ランナ全体を鋳造成型によつて形成し、さら
にランナクラウンおよびランナバンドに対するラ
ンナ羽根の付け根の部分のうち高い応力が発生す
る部分を除去し、その部分に金属材料等を埋設す
るようにしたので、材料の材質や加工性に拘らず
成型でき、複雑な形状のランナに対応でき、か
つ、鋳造欠陥に基づく強度低下を事前に防止でき
る高い生産性と信頼性を有するフランシス型ラン
ナの製造方法を提供することができる。
As is clear from the above description, according to the present invention, the entire runner is formed by casting, and furthermore, the portions where high stress occurs among the runner crown and the root portion of the runner blade relative to the runner band are removed. , by embedding a metal material, etc. in that part, it can be molded regardless of the material quality and workability, it can be used for runners with complex shapes, and it can prevent strength loss due to casting defects in advance. It is possible to provide a method for manufacturing a Francis type runner that is highly productive and reliable.
第１図はフランシス形ランナの半部を示した半
断面図、第２図はランナ羽根を断面で示した平面
図、第３図は第２図の−線に沿う断面図、第
４図はランナクラウンとランナバンドの入口と出
口の間を10分割して示した説明図、第５図は本発
明のはつり工程後のランナを示した平断面図、第
６図は第５図の−線に沿つた断面図である。
１……回転軸心、２……ランナクラウン、３…
…ランナ羽根、４……ランナバンド、５……高温
割れ、６……引け巣、７……除去部分。
Figure 1 is a half cross-sectional view showing half of a Francis-type runner, Figure 2 is a plan view showing a runner blade in cross section, Figure 3 is a cross-sectional view taken along the - line in Figure 2, and Figure 4 is a cross-sectional view of the runner blade. An explanatory diagram showing the runner crown and the inlet and outlet of the runner band divided into 10 parts, Figure 5 is a plan cross-sectional view showing the runner after the chiseling process of the present invention, and Figure 6 is the - line in Figure 5. FIG. 1...Rotation axis center, 2...Runner crown, 3...
...Runner blade, 4...Runner band, 5...High temperature cracking, 6...Shrinkage cavity, 7...Removed portion.
Claims (1)
枚のランナ羽根を挟持してなるフランシス型ラン
ナの製造方法において、ランナを一体鋳造したの
ち、ランナクラウンおよびランナバンドに対する
ランナ羽根の付け根の部分のうち高い応力が発生
する部位を除去し、その部分に溶接等の溶接金属
あるいは別途の方法で製造された金属材料を埋設
するようにしたことを特徴とするフランシス型ラ
ンナの製造方法。 ２ 前記ランナ羽根の付け根を除去する部分は、
ランナ羽根のクラウン側付根およびバンド側付根
の各々を羽根出口端（目盛０）から羽根入口端
（目盛10）まで羽根に沿つて10等分し位置配分し
た場合、クラウン側では5.5から9.0までの範囲
内、またバンド側では6.5から9.0までの範囲内で
あることを特徴とした特許請求の範囲第１項に記
載のフランシス型ランナの製造方法。[Claims] 1. In a method for manufacturing a Francis type runner in which a plurality of runner blades are sandwiched between a runner crown and a runner band, the runner is integrally cast, and then the runner blades are attached to the runner crown and runner band. A method for manufacturing a Francis-type runner, characterized in that a portion of the root portion where high stress occurs is removed, and a welded metal such as welded or a metal material manufactured by a separate method is buried in that portion. . 2. The part where the base of the runner blade is removed is
If each of the crown-side root and band-side root of the runner blade is divided into 10 equal parts along the blade from the blade outlet end (scale 0) to the blade inlet end (scale 10) and the positions are distributed, the crown side will have a range of 5.5 to 9.0. 2. The method for manufacturing a Francis type runner according to claim 1, wherein the value is within a range of 6.5 to 9.0 on the band side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58178419A JPS6069264A (en) | 1983-09-27 | 1983-09-27 | Manufacture of francis type runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58178419A JPS6069264A (en) | 1983-09-27 | 1983-09-27 | Manufacture of francis type runner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6069264A JPS6069264A (en) | 1985-04-19 |
| JPH0339195B2 true JPH0339195B2 (en) | 1991-06-13 |
Family
ID=16048166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58178419A Granted JPS6069264A (en) | 1983-09-27 | 1983-09-27 | Manufacture of francis type runner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6069264A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845448A (en) * | 1971-10-15 | 1973-06-29 |
-
1983
- 1983-09-27 JP JP58178419A patent/JPS6069264A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845448A (en) * | 1971-10-15 | 1973-06-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6069264A (en) | 1985-04-19 |
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