JPS6218709Y2 - - Google Patents
Info
- Publication number
- JPS6218709Y2 JPS6218709Y2 JP1980072491U JP7249180U JPS6218709Y2 JP S6218709 Y2 JPS6218709 Y2 JP S6218709Y2 JP 1980072491 U JP1980072491 U JP 1980072491U JP 7249180 U JP7249180 U JP 7249180U JP S6218709 Y2 JPS6218709 Y2 JP S6218709Y2
- Authority
- JP
- Japan
- Prior art keywords
- fins
- draft tube
- steel plate
- piece
- conical part
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 6
- 238000003466 welding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
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
Description
【考案の詳細な説明】
考案の技術分野
本考案は水車或いはポンプ水車等の水力機械の
ドラフトチユーブに関する。[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a draft tube of a hydraulic machine such as a water wheel or a pump water wheel.
考案の技術的背景とその問題点
従来水車或いはポンプ水車のドラフトチユーブ
は軟鋼板にて製作するのが普通である。Technical background of the invention and its problems Conventionally, draft tubes of water turbines or pump water turbines are usually made of mild steel plates.
このドラフトチユーブ内の流水の旋回流を防止
するためドラフトチユーブの上部にフインを円周
上複数個設ける場合がある。 In order to prevent the swirling flow of water within the draft tube, a plurality of fins may be provided on the circumference at the upper part of the draft tube.
この場合のフイン部に発生するキヤビテーシヨ
ンによりフインの周囲のドラフトチユーブが侵食
を受ける危険がある。このためドラフトチユーブ
のフインの周囲をステンレス鋼で肉盛り溶接して
キヤビテーシヨンの侵食を防止していた。しかし
ステンレスの肉盛り溶接及び肉盛り後の表面を滑
らかにグラインダー仕上をする作業に多大の労力
を要していた。又多量の肉盛り溶接を行なうため
ドラフトチユーブが変形し不具合を生ずることが
あつた。 In this case, there is a risk that the draft tube around the fin will be eroded due to cavitation occurring in the fin portion. For this reason, stainless steel was built up and welded around the fins of the draft tube to prevent erosion of the cavitation. However, it took a lot of effort to weld the stainless steel overlay and to grind the surface after the overlay to a smooth finish using a grinder. In addition, since a large amount of overlay welding is performed, the draft tube may be deformed, causing problems.
考案の目的
本考案の目的は従来技術の欠点を解消すべくな
されたものであつて、耐キヤビテーシヨン性にす
ぐれたドラフトチユーブの製作を容易にした水力
機械のドラフトチユーブを提供することにある。Purpose of the Invention The purpose of the present invention was to overcome the drawbacks of the prior art, and to provide a draft tube for a hydraulic machine that facilitates the manufacture of a draft tube with excellent cavitation resistance.
考案の概要
上記目的を達成するため本考案は、ランナから
の流出水を下部池に導き、そのドラフトチユーブ
の上部円錐部に流水の旋回流を防止するフインを
円周上複数個配置した水力機械のドラフトチユー
ブにおいて、フインを含む片と、フインを含まな
い片とに分割して形成するとともに、前記フイン
を含む片の不銹鋼板と、フインを含まない片の軟
鋼板とを交互に配置して一体形成したことを特徴
とするものである。Summary of the invention In order to achieve the above object, the present invention is a hydraulic machine in which the water flowing out from the runner is guided to the lower pond, and a plurality of fins are arranged around the circumference in the upper conical part of the draft tube to prevent the swirling flow of the flowing water. The draft tube is formed by dividing it into a piece containing fins and a piece not containing fins, and the rustless steel plate of the piece containing the fins and the mild steel plate of the piece not including fins are arranged alternately. It is characterized by being integrally formed.
考案の実施例
以下本考案の一実施例について第１図乃至第３
図を参照して説明する。Embodiment of the invention The following is an example of the invention shown in Figures 1 to 3.
This will be explained with reference to the figures.
１はランナからの流出水を下部池に導くドラフ
トチユーブであり、このドラフトチユーブ１の上
部円錐部分には流水の旋回流を防止するフイン２
が円周上複数個配置され取り付けられている。そ
してドラフトチユーブ１の上部円錐部分はフイン
２を含み不銹鋼板４よりなる片と、フイン２を含
まない軟鋼板５よりなる片とで形成されるように
なつている。 Reference numeral 1 designates a draft tube that guides the water flowing out from the runner to the lower pond, and the upper conical part of this draft tube 1 has fins 2 that prevent the swirling flow of the flowing water.
Multiple pieces are arranged and attached on the circumference. The upper conical portion of the draft tube 1 is formed of a piece made of a stainless steel plate 4 including fins 2 and a piece made of a mild steel plate 5 not including the fins 2.
このように構成した本考案において、ドラフト
チユーブ１の上部は一般に円錐状となつており、
この円錐部分を製作する場合円錐部を平板に展開
し、この展開図形を１枚の平板より切断して曲げ
加工を行うことは材料の歩どまり率が悪く不経済
となる。このため平板に展開された扇形を第２図
に示すように複数個に分割して材料取りするのが
一般的である。そこで本考案はフイン２の取り付
け部に相当する分割片を不銹鋼板４とし、それ以
外を軟鋼板５で材料取りするようにし、各々の分
割片４および５を所定形状に曲げ加工後溶接にて
一体結合して円錐形状を形成し、その後フイン２
を所定の位置に取り付けてドラフトチユーブ１の
上部円錐部を製作するようにしたものである。 In the present invention configured in this way, the upper part of the draft tube 1 is generally conical,
When manufacturing this conical part, it is uneconomical to develop the conical part into a flat plate, cut the developed figure from one flat plate, and perform bending because the material yield rate is poor. For this reason, it is common to divide a fan-shaped flat plate into a plurality of pieces as shown in FIG. 2 and then take the material. Therefore, in the present invention, the divided piece corresponding to the attachment part of the fin 2 is made of stainless steel plate 4, and the other parts are made of mild steel plate 5, and each divided piece 4 and 5 is bent into a predetermined shape and then welded. The fins 2 are joined together to form a conical shape, and then the fins 2
The upper conical part of the draft tube 1 is manufactured by attaching it to a predetermined position.
これによれば溶接組立された円錐のフイン２の
周囲は第３図に示す様に不銹鋼板４となつている
ため耐キヤビテーシヨンのための肉盛りを必要と
しない。従つて肉盛り溶接及び仕上に要した労力
は不要となり又、肉盛り溶接による側板に変形を
生じる恐れもなくなるものである。 According to this, the periphery of the conical fin 2 assembled by welding is made of a stainless steel plate 4 as shown in FIG. 3, so there is no need for build-up for cavitation resistance. Therefore, the labor required for build-up welding and finishing becomes unnecessary, and there is no risk of deformation of the side plate due to build-up welding.
考案の効果
以上述べた様に円錐を展開した分割片の１部を
不銹鋼板とすることにより耐キヤビテーシヨンの
円錐部を容易に製作出来るものである。Effects of the invention As described above, by using a stainless steel plate as a part of the cone-shaped divided piece, a cavitation-resistant cone part can be easily manufactured.
第１図は本考案の一実施例を示す水車の説明
図、第２図は第１図のドラフトチユーブの展開説
明図、第３図は第２図のフイン周囲の拡大説明図
である。
１……ドラフトチユーブ、２……フイン、４…
…不銹鋼板、５……軟鋼板。
FIG. 1 is an explanatory view of a water turbine showing an embodiment of the present invention, FIG. 2 is an explanatory expanded view of the draft tube in FIG. 1, and FIG. 3 is an enlarged explanatory view of the fin and its surroundings in FIG. 1... Draft tube, 2... Finn, 4...
...Rustless steel plate, 5...Mild steel plate.
Claims (1)
円錐部に流水の旋回流を防止するフインを円周上
複数個配置した水力機械のドラフトチユーブにお
いて、上部円錐部をフインを含む片とフインを含
まない片とに分割して形成するとともに、前記フ
インを含む片の不銹鋼板と、フインを含まない片
の軟鋼板とを交互に配置して一体形成したことを
特徴とする水力機械のドラフトチユーブ。 In a draft tube of a hydraulic machine, the upper conical part is arranged to guide the runoff water from the runner to the lower pond, and the upper conical part has a plurality of fins arranged around the circumference to prevent the swirling flow of the flowing water. A draft tube for a hydraulic machine, characterized in that it is formed by being divided into a piece that does not contain fins, and is integrally formed by alternately arranging the stainless steel plate that includes the fins and the mild steel plate that does not include the fins. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980072491U JPS6218709Y2 (en) | 1980-05-28 | 1980-05-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980072491U JPS6218709Y2 (en) | 1980-05-28 | 1980-05-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56173780U JPS56173780U (en) | 1981-12-22 |
| JPS6218709Y2 true JPS6218709Y2 (en) | 1987-05-13 |
Family
ID=29665853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980072491U Expired JPS6218709Y2 (en) | 1980-05-28 | 1980-05-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6218709Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166866A (en) * | 1984-09-10 | 1986-04-05 | Fuji Electric Co Ltd | Draft tube for reaction water turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341142A (en) * | 1976-08-02 | 1978-04-14 | Honeywell Inf Systems | Expansion and section clock device |
| JPS5482139A (en) * | 1977-11-23 | 1979-06-30 | Honeywell Inf Systems | Clock system for dynamically selecting clock period |
| JPS5520504A (en) * | 1978-06-27 | 1980-02-14 | Panafacom Ltd | Clock control system |
| JPS5558353A (en) * | 1978-10-20 | 1980-05-01 | Hitachi Ltd | Stainless cast steel for hydraulic turbine runner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5398262U (en) * | 1977-01-14 | 1978-08-09 |
-
1980
- 1980-05-28 JP JP1980072491U patent/JPS6218709Y2/ja not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341142A (en) * | 1976-08-02 | 1978-04-14 | Honeywell Inf Systems | Expansion and section clock device |
| JPS5482139A (en) * | 1977-11-23 | 1979-06-30 | Honeywell Inf Systems | Clock system for dynamically selecting clock period |
| JPS5520504A (en) * | 1978-06-27 | 1980-02-14 | Panafacom Ltd | Clock control system |
| JPS5558353A (en) * | 1978-10-20 | 1980-05-01 | Hitachi Ltd | Stainless cast steel for hydraulic turbine runner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56173780U (en) | 1981-12-22 |
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