JPH0721899Y2 - Crossflow turbine guide vanes - Google Patents
Crossflow turbine guide vanesInfo
- Publication number
- JPH0721899Y2 JPH0721899Y2 JP1987122506U JP12250687U JPH0721899Y2 JP H0721899 Y2 JPH0721899 Y2 JP H0721899Y2 JP 1987122506 U JP1987122506 U JP 1987122506U JP 12250687 U JP12250687 U JP 12250687U JP H0721899 Y2 JPH0721899 Y2 JP H0721899Y2
- Authority
- JP
- Japan
- Prior art keywords
- guide vane
- water
- guide vanes
- casing
- turbine
- 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
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
Landscapes
- Hydraulic Turbines (AREA)
Description
【考案の詳細な説明】 A.産業上の利用分野 本考案はクロスフロー水車のガイドベーンに関する。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a guide vane of a cross flow turbine.
B.従来の技術 第３図に従来のクロスフロー水車を示すように、ケーシ
ング２内において、ランナ１に導かれる水量を調整する
ことができるよう、ランナ１の上流側にガイドベーン４
が配置されている。ガイドベーン４はその中心を軸５が
貫通し、この軸５を介してケーシング２より軸支されて
いる。外部より、この軸５を操作してガイドベーン４を
回動させて、水量に応じて適切にランナ１に水を導ける
ようにしている。尚、図中３はケーシングカバーであ
る。B. Conventional Technology As shown in the conventional cross-flow turbine in FIG. 3, in the casing 2, a guide vane 4 is provided upstream of the runner 1 so that the amount of water introduced to the runner 1 can be adjusted.
Are arranged. A shaft 5 penetrates the center of the guide vane 4, and is axially supported by the casing 2 via the shaft 5. From the outside, the shaft 5 is operated to rotate the guide vanes 4 so that water can be appropriately guided to the runner 1 according to the amount of water. Incidentally, numeral 3 in the drawing is a casing cover.
C.考案が解決しようとする問題点 しかしながら、ガイドベーン４を軸５を中心に回動させ
ることができるよう、第５図に示すようにガイドベーン
４の両端とケーシング２の間にわずかなギャップＧが設
けられている。このため、第４図に示すようにガイドベ
ーン４が回動して部分負荷の開度となった時、矢印で示
すようにガイドベーン先端側においてガイドベーン両端
のギャップＧより多量の水漏れを生じていた。この水漏
れは、ランナブレードに動力として作用しない無効水量
となってしまうばかりでなく、逆にブレーキ作用を生じ
させ大きな損失となり部分負荷時における水車効率を大
巾に低下させている。更にガイドベーン両側のギャップ
Ｇからの水漏れによってキャビテーションが発生するこ
とがあり、キャビテーションの作用により、ガイドベー
ン４、ケーシング２、ランナブレードに障害が生ずるこ
ともあった。つまり、ガイドベーン両端のギャップＧか
らの漏れ水は水車性能及び信頼性を著しく低下させてい
た。C. Problems to be Solved by the Invention However, in order to rotate the guide vane 4 around the shaft 5, as shown in FIG. 5, there is a slight gap between both ends of the guide vane 4 and the casing 2. G is provided. For this reason, when the guide vanes 4 rotate to reach the partial load opening as shown in FIG. 4, a large amount of water leaks from the gaps G at both ends of the guide vanes on the tip side of the guide vanes as shown by the arrow. It was happening. This water leakage not only results in an amount of ineffective water that does not act as power on the runner blade, but also causes a braking action to the contrary, resulting in a large loss, which drastically reduces the turbine efficiency under partial load. Further, water leakage from the gaps G on both sides of the guide vane may cause cavitation, and the action of the cavitation may cause damage to the guide vane 4, the casing 2, and the runner blade. That is, the leaked water from the gaps G at both ends of the guide vane significantly deteriorated the turbine performance and reliability.
本考案はガイドベーン両端からの水漏れを防止できるク
ロスフロー水車のガイドベーンを提供することを目的と
する。An object of the present invention is to provide a guide vane for a cross flow turbine that can prevent water leakage from both ends of the guide vane.
D.問題点を解決するための手段及び作用 ガイドベーンの両端外周部に漏水防止用の鍔を設けたの
で、ガイドベーン両端とケーシングとのギャップから漏
れる水の量が減少し、このため水車効率が大巾に向上す
るばかりでなく、キャビテーションの発生が抑えられ
る。D. Means and Actions for Solving Problems Since the flanges for preventing water leakage are provided on the outer peripheral portions of both ends of the guide vane, the amount of water leaking from the gap between the both ends of the guide vane and the casing is reduced, which results in the turbine efficiency. Not only greatly improves, but also suppresses the occurrence of cavitation.
E.実施例 以下、本考案の一実施例について図面を参照して詳細に
説明する。E. Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図及び第２図に本考案の一実施例を示す。両図に示
すように、ガイドベーン４の両端には鍔4aが設けられて
いる。鍔4aは、ガイドベーン４の開閉に支障をきたさな
いよう、全周にわたって設けられておらず、ガイドベー
ン４の上流側だけに設けられている。鍔4aの高さＨは、
ガイドベーン４が部分負荷開度の位置で水流に対するガ
イドベーン厚さが全体に均一又は大きくなるよう、先端
に近づくに従って高くなっている。鍔4aの厚さｔは、ガ
イドベーン４での水流損失を生じさせない適度な大きさ
とすれば良い。1 and 2 show an embodiment of the present invention. As shown in both figures, the flange 4a is provided at both ends of the guide vane 4. The collar 4a is not provided over the entire circumference so as not to hinder the opening and closing of the guide vane 4, and is provided only on the upstream side of the guide vane 4. The height H of the collar 4a is
The guide vane 4 is increased toward the tip so that the thickness of the guide vane with respect to the water flow becomes uniform or large as a whole at the position of the partial load opening. The thickness t of the collar 4a may be set to an appropriate size that does not cause water flow loss in the guide vane 4.
このような鍔4aを設けると、第２図に示すように、ガイ
ドベーン４の両端とケーシング２との間のギャップＧの
流れ方向に対する長さが、従来のガイドベーン厚さｌか
らこれに鍔4aの高さを加えたＬに大巾に増大させること
ができるので、ギャップＧの大きさを変化させることな
く、漏れ水通路の抵抗を増大させることができる。この
ため漏れ水量を大幅に減少させることができ、無効水量
の減少による水車効率の向上が達成できる。特に、部分
負荷時におけるガイドベーン先端からの漏れ水を防止で
きるから、部分負荷での水車効率を大巾に向上できる。When such a collar 4a is provided, as shown in FIG. 2, the length of the gap G between both ends of the guide vane 4 and the casing 2 with respect to the flow direction is changed from the conventional guide vane thickness 1 to this. Since the height of 4a can be greatly increased to L, the resistance of the leak water passage can be increased without changing the size of the gap G. Therefore, the amount of leaked water can be greatly reduced, and the efficiency of the turbine can be improved by reducing the amount of ineffective water. In particular, water leakage from the tip of the guide vane at the time of partial load can be prevented, so that the turbine efficiency at partial load can be greatly improved.
更に、ガイドベーン両端のギャップＧで生じるキャビテ
ーションを防止でき、クロスフロー水車ランナー、ガイ
ドベーン、ケーシングの信頼性を高めることができる。
また、ガイドベーン４の水流方向の剛性を増すことがで
きるから、肉厚が薄いガイドベーン先端部でも十分な剛
性が得られる。Furthermore, it is possible to prevent cavitation that occurs in the gaps G at both ends of the guide vanes, and it is possible to improve the reliability of the cross flow turbine runner, the guide vanes, and the casing.
Further, since the rigidity of the guide vane 4 in the water flow direction can be increased, sufficient rigidity can be obtained even at the tip end portion of the guide vane having a small wall thickness.
F.考案の効果 以上、実施例に基づいて具体的に説明したように、本考
案ではガイドベーン両端に漏水防止用の鍔を設けたの
で、無効水量が減少して水車効率が高められる。更に
は、キャビテーションの発生防止により信頼性が高めら
れ、ガイドベーンの剛性向上にも寄与する。F. Effect of the Invention As described above in detail with reference to the embodiments, since the present invention is provided with the collars for preventing water leakage at both ends of the guide vanes, the amount of ineffective water is reduced and the efficiency of the turbine is increased. Furthermore, the prevention of cavitation enhances reliability and contributes to the rigidity of the guide vanes.
第１図は本考案の一実施例に係るクロスフロー水車の縦
断面図、第２図は本考案の一実施例に係るクロスフロー
水車の横断面図、第３図は従来のクロスフロー水車の縦
断面図、第４図はギャップからの水漏れを示す説明図、
第５図はギャップの位置を示す説明図である。 図面中、 １はランナ、２はケーシング、３はケーシングカバー、
４はガイドベーン、4aは鍔、５は軸、Ｇはギャップであ
る。1 is a longitudinal sectional view of a cross-flow turbine according to an embodiment of the present invention, FIG. 2 is a transverse sectional view of a cross-flow turbine according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a conventional cross-flow turbine. FIG. 4 is a longitudinal sectional view, and FIG. 4 is an explanatory view showing water leakage from the gap,
FIG. 5 is an explanatory diagram showing the positions of the gaps. In the drawings, 1 is a runner, 2 is a casing, 3 is a casing cover,
4 is a guide vane, 4a is a collar, 5 is a shaft, and G is a gap.
Claims (1)
量を調整するガイドベーンが回動自在に軸支されると共
に該ガイドベーンの両端外周部に漏水防止用の鍔を設け
たことを特徴とするクロスフロー水車のガイドベーン。1. A cross characterized in that a guide vane for adjusting the amount of water introduced to a runner is rotatably supported in a casing, and a flange for preventing water leakage is provided at an outer peripheral portion of both ends of the guide vane. Flow vane guide vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987122506U JPH0721899Y2 (en) | 1987-08-12 | 1987-08-12 | Crossflow turbine guide vanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987122506U JPH0721899Y2 (en) | 1987-08-12 | 1987-08-12 | Crossflow turbine guide vanes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6427478U JPS6427478U (en) | 1989-02-16 |
| JPH0721899Y2 true JPH0721899Y2 (en) | 1995-05-17 |
Family
ID=31370504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987122506U Expired - Lifetime JPH0721899Y2 (en) | 1987-08-12 | 1987-08-12 | Crossflow turbine guide vanes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721899Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62131978A (en) * | 1985-12-04 | 1987-06-15 | Hitachi Ltd | Once-through water turbine |
-
1987
- 1987-08-12 JP JP1987122506U patent/JPH0721899Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6427478U (en) | 1989-02-16 |
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