JPS59115475A - movable impeller water wheel - Google Patents
movable impeller water wheelInfo
- Publication number
- JPS59115475A JPS59115475A JP57224485A JP22448582A JPS59115475A JP S59115475 A JPS59115475 A JP S59115475A JP 57224485 A JP57224485 A JP 57224485A JP 22448582 A JP22448582 A JP 22448582A JP S59115475 A JPS59115475 A JP S59115475A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- blade
- gap
- cavitation
- post
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 19
- 238000012856 packing Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 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
- F03B3/04—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
- F03B3/06—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines
-
- 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
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は可動羽根水車に関する。[Detailed description of the invention] The present invention relates to a movable impeller water turbine.
一般にカブランまたはバルブ形水車の羽根の可動構造は
、可動ランナ羽根とランナホスとの隙間からの漏れ流れ
があり、キャビテーション性能に及ぼす影響が大きく、
特に羽根面の流速が早い高比速度の場合には可動ランナ
羽根付根部のキャビテーションが支配的となり水車効率
を低下させることから、このランナ羽根付根部のキャビ
テーションの発生を抑制することが必要である。In general, the movable structure of the blades of a cablan or valve type water turbine has leakage flow from the gap between the movable runner blade and the runner, which has a large effect on cavitation performance.
In particular, at high specific speeds where the flow velocity on the blade surface is fast, cavitation at the root of the movable runner blade becomes dominant and reduces turbine efficiency, so it is necessary to suppress the occurrence of cavitation at the root of the runner blade. .
第１区は従来の実施例を示しカブラン水車のランナポス
要部の構成図である。図において、１はランナポス、２
は水車軸、３はランナ羽根である。The first section shows a conventional example and is a configuration diagram of the main part of the runner of a Kabran water turbine. In the figure, 1 is Lannapos, 2
is the water wheel shaft, and 3 is the runner blade.
このランナ羽根３は羽根ボス３ａと一体に構成され、羽
根ポス３ａ部がランナポス１に回転可能に埋設されてい
る。また、ランナ羽根３はランナポス１の外周面との間
に隙間δを形成し、図示しないガイドベーンの開度に応
じて自動的に角度を変えられるようにしである。この操
作機構４はランナポスＩＶｃ内蔵され、羽根ポス３ａと
サーボモータピストン５に係合している。図示しないザ
ーボモータは水車軸２の内にあり、サーボモータピスト
ン５の上下動によって操作機構４が操作される。操作機
構４は羽根ボス３ａを操作し、ランナ羽根３が図示しな
いガイドベーンと連動し角度を変えるように構成されて
いる。サーボモータピストン５の操作油圧は水車軸２の
頂部の図示しない圧油導入装置から水車軸２を通して導
入されている。The runner blade 3 is constructed integrally with a blade boss 3a, and the blade post 3a portion is rotatably embedded in the runner post 1. Further, a gap δ is formed between the runner blade 3 and the outer peripheral surface of the runner post 1, so that the angle can be automatically changed according to the opening degree of a guide vane (not shown). This operating mechanism 4 is built into the runner post IVc and engages with the vane post 3a and the servo motor piston 5. A servo motor (not shown) is located inside the water wheel shaft 2, and the operating mechanism 4 is operated by the vertical movement of the servo motor piston 5. The operating mechanism 4 is configured to operate the blade boss 3a and change the angle of the runner blade 3 in conjunction with a guide vane (not shown). The operating oil pressure for the servo motor piston 5 is introduced through the water wheel shaft 2 from a pressure oil introducing device (not shown) at the top of the water wheel shaft 2.
このような構造において、水車運転中のランナ羽根３と
ランナポス１との間の隙間ざを通る漏れ流れがランナ羽
根３下面の流れを乱すため、ランナ羽根３付根部にキャ
ビテーションが発生し易い。In such a structure, the leakage flow passing through the gap between the runner blade 3 and the runner post 1 during operation of the water turbine disturbs the flow on the lower surface of the runner blade 3, and cavitation is likely to occur at the root of the runner blade 3.
特に比速度の大きい４枚ランナ羽根では、このうンナ羽
根付根部のキャビテーションが支配的となり水車効率を
低下させる。従来は、ランナ羽根付根部のキャビテーシ
ョンによる水車効率低下を防止するために、水車を放水
位より低く据付けているが土木掘削量が多（土木工事費
が多大にかかることなどが欠点であった。In particular, in the case of four runner blades having a high specific speed, cavitation at the root portion of the runner blades becomes dominant and reduces the efficiency of the water turbine. In the past, in order to prevent the efficiency of the turbine from decreasing due to cavitation at the base of the runner blades, the turbine was installed lower than the discharge water level, but this method required a large amount of civil engineering work (and the cost of civil engineering work was high).
本発明は上記のような欠点を除去し、簡単な構造でキャ
ビテーションを抑制し土木工事費を低減することのでき
る可動羽根水車を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a movable impeller water turbine that can eliminate the above-mentioned drawbacks, suppress cavitation with a simple structure, and reduce civil engineering costs.
本発明によれば上記の目的は、可動羽根のランナポスと
ランナ羽根との間の隙間をパツキンにより水密に封じ、
前記隙間からの漏れ流れを防止するようにした可動羽根
水車によって達セられろ。According to the present invention, the above object is to watertightly seal the gap between the runner post of the movable blade and the runner blade with a gasket,
This is achieved by a movable impeller water wheel designed to prevent leakage flow from the gap.
第２図は本発明の実施例を示し、第２図（ａ）は第１図
のＡ−Ａ矢視に相当する断面図、第２図（ｂｌは第２１
ｉ９（ａｌのＢ−Ｂ矢視断面拡大図である。図において
第１図に示すものと同じ構成要素のものには同じ符号を
付してその説明を省略する。ランナ羽根２３には、第２
図に示すようにランナポス１との対向面に溝２：（ａが
設けられ、構２３ａにパンキン２４が埋め込まれている
。このパツキンの先端部２４ａはランナポスの外周面１
ａと接し、ランナポス１と隙間なしでランナポス外周面
１ａを摺動可能なようにしである。2 shows an embodiment of the present invention, FIG. 2(a) is a sectional view corresponding to the A-A arrow direction in FIG.
i9(al) is an enlarged cross-sectional view taken along the line B-B. In the figure, the same components as those shown in FIG. 2
As shown in the figure, a groove 2: (a) is provided on the surface facing the runner post 1, and a punch 24 is embedded in the structure 23a.
a, so that the outer peripheral surface 1a of the runner post 1 can be slid on the runner post 1 without a gap.
このようにランナポス１とランナ羽根２３との間の隙間
δをパツキン２４により水密に封じ、パツキン２４がラ
ンナポス外周面１ａを蜜漬摺動することから、サーボモ
ータピストン５の上下動によって、ガイドベーン開度の
変化に応じてランナ羽根２３は角度を変えろことが可能
となる。さらに、ランナポス１とランナ羽根２３との間
の隙間からの漏れ流れがなくなり、ランナ羽根付根部の
キャビテーションが抑制される。従って、水車効率の低
下がなくなり、水車は常に正常な運転を続けることがで
きる。In this way, the gap δ between the runner post 1 and the runner vane 23 is watertightly sealed by the packing 24, and since the packing 24 slides on the outer circumferential surface 1a of the runner post, the guide vane is moved up and down by the vertical movement of the servo motor piston 5. The angle of the runner blade 23 can be changed according to the change in the opening degree. Furthermore, leakage flow from the gap between the runner pos 1 and the runner blade 23 is eliminated, and cavitation at the root of the runner blade is suppressed. Therefore, there is no reduction in water turbine efficiency, and the water turbine can always continue to operate normally.
また、ランナポス１とランナ羽根２３との間の隙間δに
パツキン２４を設けることにより、従来、隙間を小さく
することで加工精度を要したランナポス外周面１ａとラ
ンナ羽根器付根部の加工が隙間を大きくとれることから
容易となり、加工時間を短縮することができる。In addition, by providing the packing 24 in the gap δ between the runner post 1 and the runner blade 23, the machining of the outer circumferential surface 1a of the runner post and the base of the runner impeller, which conventionally required machining precision by reducing the gap, can be done without the gap. Since it can be made large, it is easy and the machining time can be shortened.
本発明は上記のように、可動羽根のランナポスとランナ
羽根との間の隙間をパツキンにより水密に封じ、前記隙
間からの漏れ流れを防止するようにしたことにより、簡
単な構造で水車効率低下の支配的要因となるランナ羽根
付根部のキャビテーションを抑制し、発電所の土木建設
費を大幅に削減することのできろ可動羽根水車を提供す
ることができる。As described above, the present invention has a simple structure that reduces water turbine efficiency by sealing the gap between the runner post of the movable blade and the runner blade water-tightly with a gasket to prevent leakage from the gap. It is possible to provide a movable blade water turbine that can suppress cavitation at the root of the runner blade, which is a dominant factor, and can significantly reduce civil engineering construction costs for power plants.
尚、上述した実施例においては、カブラン水車の可動ラ
ンナ羽根付根部のキャビテーションの低減方法につき述
べたが、本発明はこれに限らず可動羽根ポンプにも利用
できる。In the above-mentioned embodiment, a method for reducing cavitation at the root of a movable runner blade of a Kabran water turbine has been described, but the present invention is not limited to this, and can also be applied to a movable vane pump.
第１図は従来例を示しカブラン水車のランナボス要部の
構成医、第２図は本発明の実施例を示し、第２図（ａｌ
は第１図のＡ−Ａ矢視に相当する断面図、第２図（ｂｌ
は＊！、交隊騒製悌第２因（ａｌのＢ−Ｂ矢視断面拡大
図である。
１・・・ランナポス、２３・・・ランナ羽根、２４・・
・パツキン０Fig. 1 shows a conventional example, and Fig. 2 shows an embodiment of the present invention, and Fig. 2 (al.
is a sectional view corresponding to the A-A arrow direction in Fig. 1, and Fig. 2 (bl
teeth*! This is an enlarged cross-sectional view taken along the line B-B of al. 1... Runner post, 23... Runner blade, 24...
・Patsukin 0
Claims (1)
パツキンにより水密に封じ、前記隙間からの漏れ流れを
防止するよ５１Ｃしたことを特徴とする可動羽根水車。1) A movable blade water turbine characterized in that the gap between the runner post and the runner blade of the movable blade is watertightly sealed with a gasket to prevent leakage from the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57224485A JPS59115475A (en) | 1982-12-21 | 1982-12-21 | movable impeller water wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57224485A JPS59115475A (en) | 1982-12-21 | 1982-12-21 | movable impeller water wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59115475A true JPS59115475A (en) | 1984-07-03 |
Family
ID=16814528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57224485A Pending JPS59115475A (en) | 1982-12-21 | 1982-12-21 | movable impeller water wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115475A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5310316A (en) * | 1991-08-28 | 1994-05-10 | Itt Flygt Ab | Impeller for a propeller pump |
| US5947679A (en) * | 1996-03-28 | 1999-09-07 | Voith Hydro, Inc. | Adjustable blade turbines |
| US5954474A (en) * | 1996-03-28 | 1999-09-21 | Voith Hydro, Inc. | Hydro-turbine runner |
| JP2021173185A (en) * | 2020-04-22 | 2021-11-01 | 株式会社荏原製作所 | Impeller and hydraulic machine |
| WO2024120742A1 (en) * | 2022-12-07 | 2024-06-13 | Voith Patent Gmbh | Method for producing a rotor blade |
-
1982
- 1982-12-21 JP JP57224485A patent/JPS59115475A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5310316A (en) * | 1991-08-28 | 1994-05-10 | Itt Flygt Ab | Impeller for a propeller pump |
| US5947679A (en) * | 1996-03-28 | 1999-09-07 | Voith Hydro, Inc. | Adjustable blade turbines |
| US5954474A (en) * | 1996-03-28 | 1999-09-21 | Voith Hydro, Inc. | Hydro-turbine runner |
| US6164907A (en) * | 1996-03-28 | 2000-12-26 | Voith Siemens Hydro Power Generation Inc. | Adjustable blade turbines |
| US6402477B1 (en) * | 1996-03-28 | 2002-06-11 | Voith Siemens Hydro Power Generation, Inc. | Adjustable blade turbines |
| US6533536B1 (en) | 1996-03-28 | 2003-03-18 | Voith Hydro, Inc. | Hydro-turbine runner |
| JP2021173185A (en) * | 2020-04-22 | 2021-11-01 | 株式会社荏原製作所 | Impeller and hydraulic machine |
| WO2024120742A1 (en) * | 2022-12-07 | 2024-06-13 | Voith Patent Gmbh | Method for producing a rotor blade |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1179238A (en) | Hydropower turbine system | |
| GB1505534A (en) | Turbines and compressors | |
| GB1504635A (en) | Hydraulic machine | |
| GB1081458A (en) | Blade assembly for a fluid flow machine such as a gas turbine engine | |
| US3253816A (en) | De-aeration of sealing fluid in aerated rotary fluid machines | |
| JPS59115475A (en) | movable impeller water wheel | |
| CA1215268A (en) | Sealing of a shaft in a centrifugal pump and a method for effecting the sealing | |
| JP2739874B2 (en) | Inducer pump with shroud | |
| RU2636965C1 (en) | Reversing turbine stage | |
| JPS5744707A (en) | Arrangement for damping vibration of rotor in axial-flow rotary machine | |
| US3405913A (en) | Rotary seal structure | |
| US3360238A (en) | Shroud seal for hydraulic machines | |
| EP0079433A1 (en) | Centrifugal pump | |
| US4588352A (en) | Multistage hydraulic machine | |
| SE7610577L (en) | FOR A GAS TURBINE INTENDED STATOR | |
| US3447782A (en) | Supply of sealing fluid for rotary fluid machines | |
| JPS58113504A (en) | Construction of moving blade in axial flow fluid machine | |
| CN106761959A (en) | For the jet-propelled comb gland seal structure of self-regulated of turbomachinery | |
| JPH08177705A (en) | Main shaft sealing water device of vertical shaft hydraulic turbine | |
| RU2008437C1 (en) | Astern turbine stage | |
| JPH0913905A (en) | Turbine | |
| SE8405244L (en) | IMPROVED MULTI-STEP CENTRIFUGAL PUMP, OF THE TYPE WITH CLOSED PUMP WHEEL, WITH ANY PARTICULAR EFFICIENCY GIVEN | |
| JPS6157959B2 (en) | ||
| SU1232853A1 (en) | Blade of axial hydraulic machine rotor | |
| JP2005214051A (en) | Axial-flow turbine stage and axial-flow turbine |