JPH0472468A - Francis turbine - Google Patents
Francis turbineInfo
- Publication number
- JPH0472468A JPH0472468A JP2181456A JP18145690A JPH0472468A JP H0472468 A JPH0472468 A JP H0472468A JP 2181456 A JP2181456 A JP 2181456A JP 18145690 A JP18145690 A JP 18145690A JP H0472468 A JPH0472468 A JP H0472468A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary vane
- runner
- vane
- auxiliary
- cone
- 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 claims abstract description 17
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000630 rising 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
Landscapes
- Hydraulic Turbines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は水力発電所用フランシス形ランナの構造に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a Francis-type runner for a hydroelectric power plant.
従来の装置は特開昭５１−２９６１０号公報に記載（第
５図、第６図）のように、ランナボスカバーに複数の羽
根７を取り付けていた。このような羽根を取り付けるこ
とにより、第７図に示されるように、小流量運転時にラ
ンナ出口の旋回速度Ｃｕを小さくすることができ、大き
な旋回速度に起因する振動や効率の低下を防ぐことがで
きる。A conventional device has a plurality of blades 7 attached to a runner boss cover, as described in Japanese Patent Application Laid-Open No. 51-29610 (FIGS. 5 and 6). By installing such a blade, as shown in Fig. 7, it is possible to reduce the swirling speed Cu at the runner outlet during low flow rate operation, and it is possible to prevent vibrations and a decrease in efficiency caused by large swirling speeds. can.
上記従来技術は最高効率運転や大流量時には、小流量時
とは逆に、ランナの回転方向とは逆の旋回流れを生じる
。このような旋回流が生じると、振動の発生や効率の低
下を生じる。In the above-mentioned conventional technology, during maximum efficiency operation or a large flow rate, a swirling flow occurs in the opposite direction to the rotational direction of the runner, contrary to when the flow rate is small. When such a swirling flow occurs, vibrations occur and efficiency decreases.
本発明の目的は小流量時にも、大流量時も振動の発生や
効率の低下を生じることの少ない水車を提供することに
ある。An object of the present invention is to provide a water turbine that does not cause vibration or decrease in efficiency even when the flow rate is small or large.
上記目的を達成するために、本発明は小流量時には旋回
を防ぐ装置をランナコーンより流路へ押し出すことによ
り作動させ、小流量運転時ではランナコーン内部へ収納
することにより、作動させないようにするものである。In order to achieve the above object, the present invention operates a device for preventing swirling by pushing it out from the runner cone into the flow path when the flow rate is small, and prevents it from being activated when the flow rate is small by storing it inside the runner cone. be.
本発明は、小流量時には補助ベーンがランナコーン部よ
り流水部に露出して、補助ベーンの働きをして旋回流を
小さくする。一方、最高効率時や大流量時には、ランナ
コーン内に納まり、流水部に露出しないため、補助ベー
ンが作動せず、ランナ回転方向とは逆の旋回流を生じる
ことはない。In the present invention, when the flow rate is small, the auxiliary vanes are exposed to the flowing water part from the runner cone part, and act as auxiliary vanes to reduce the swirling flow. On the other hand, at maximum efficiency or high flow rate, the auxiliary vanes do not operate because they are housed within the runner cone and are not exposed to the flowing water, and no swirling flow occurs in the opposite direction to the runner rotation direction.
以下、本発明の一実施例を第１図、第２図により説明す
る。第１図はフランシス形水車のランナコーン部の詳細
図であり、第２図は第１図のｎ−■線における平面図で
ある。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a detailed view of the runner cone portion of the Francis type water turbine, and FIG. 2 is a plan view taken along the line n--■ in FIG. 1.
第１図に示されるように、補助ベーン１０はオリジナル
のランナコーン１１と内側ランナコーン１２との間にあ
り、第２図に示されるように、主ベーン８の延長上にあ
る。また、内側ランナコーン１２は支柱１３と外周りン
グ１４により支えられている。また、外周リング１４に
凸部１５があり、ランナ側の凹部３１と一対になって補
助ベーン１０に加わるトルクをランナ５０に伝える。こ
れらの補助ベーンとランナコーンはフランジ１６とボル
ト２１により油圧サーボと連結されているシャフト２０
と結合される。また、メインシャ２１−３６内のシャフ
ト２０はシールリング３３で水が上へ上っていくのを防
いでいる。As shown in FIG. 1, the auxiliary vane 10 is located between the original runner cone 11 and the inner runner cone 12, and as shown in FIG. 2, is an extension of the main vane 8. Further, the inner runner cone 12 is supported by a column 13 and an outer ring 14. Further, the outer ring 14 has a convex portion 15 which forms a pair with a concave portion 31 on the runner side to transmit the torque applied to the auxiliary vane 10 to the runner 50. These auxiliary vanes and runner cones are connected to a shaft 20 which is connected to a hydraulic servo by a flange 16 and bolts 21.
is combined with Further, the shaft 20 in the main shaft 21-36 is equipped with a seal ring 33 to prevent water from rising upward.
さらに、従来使われている水スラスト低減用のバランス
ホール３２を通過した水をドラフト５１側へ流出させる
ため、第２図に示されるように、フランジ１６には、抜
水用孔１７がおいている。Furthermore, in order to drain the water that has passed through the conventional balance hole 32 for reducing water thrust to the draft 51 side, the flange 16 is provided with a drainage hole 17, as shown in FIG. There is.
ランナ５０はメインシャフト３６と、フランジ３４、及
びボルト３５を介して直結されている。The runner 50 is directly connected to the main shaft 36 via a flange 34 and bolts 35.
図示されてはないないが、メインシャフトと発電機シャ
フトとの結合部に油圧サーボモータが設置され、油圧は
発電機主軸上端から供給される。Although not shown, a hydraulic servo motor is installed at the joint between the main shaft and the generator shaft, and hydraulic pressure is supplied from the upper end of the generator main shaft.
このように、油圧サーボにより、補助ベーン１０は第１
図で上下移動することができ、小流量運転時は補助ベー
ンを第１図のように流水面に出し、最高効率運転時や大
流量時には、上に移動して、補助ベーンをランナ流水面
に出さないようにすることができる。また、小流量の程
度により補助ベーンを流水面に出す程度も変えることが
できる。In this way, the auxiliary vane 10 is moved to the first position by the hydraulic servo.
The auxiliary vane can be moved up and down as shown in the figure. During low flow operation, the auxiliary vane is placed on the water surface as shown in Fig. 1, and during maximum efficiency operation or large flow rate, it is moved upward and the auxiliary vane is placed on the runner water surface. You can prevent it from coming out. Furthermore, depending on the degree of small flow rate, the extent to which the auxiliary vanes are exposed to the water surface can be changed.
このように、小流量時には補助ベーンを流水面に出すこ
とにより、従来の振動の発生や効率の低下を押えること
ができ、大流量時や最高効率運転時には、補助ベーンを
上へ移動して、流水面に出さないようにすることにより
、従来と同じく、効率の良い運転を行うことができる。In this way, by bringing the auxiliary vane out to the surface of the flowing water when the flow is small, it is possible to suppress the generation of vibration and decrease in efficiency that would otherwise occur, and when the flow is large or when operating at maximum efficiency, the auxiliary vane can be moved upwards. By keeping it out of the flowing water, efficient operation can be achieved as before.
第３図は本発明の変形例を示す。本変形例では補助ベー
ンの代わりに円筒の流路縮小板８０を設ける。この流路
縮小板により、小流量時におけるランナ流路を狭ばめる
ことかでき、第４図に示されるように、流路縮小板で影
響されない部分の流速が大（Ｗ）となり、その結果、旋
回速度（Ｃｕ）が小さくなり、振動や効率の低下を防ぐ
ことができる。FIG. 3 shows a modification of the invention. In this modification, a cylindrical flow path reduction plate 80 is provided instead of the auxiliary vane. With this flow path reduction plate, the runner flow path can be narrowed when the flow rate is small, and as shown in Figure 4, the flow velocity in the portion not affected by the flow path reduction plate becomes high (W). As a result, the turning speed (Cu) is reduced, making it possible to prevent vibrations and a decrease in efficiency.
本発明によれば、小流量運転時の旋回を小さくすること
ができるので、振動の発生や効率の低下を小さくするこ
とができる。According to the present invention, it is possible to reduce swirling during low flow rate operation, thereby reducing occurrence of vibration and reduction in efficiency.
第１図は本発明の一実施例のフランシス水車ランナコー
ン部の断面図、第２図は第１図の■−■矢視断面図、第
３図は本発明の他の実施例の断面図、第４図は本発明の
他の実施例の説明図、第５図は従来技術の断面図、第６
図は従来技術の平面図、第７図は従来技術のランナ出口
流れの説明図である。
１０・・補助ベーン、１１・・・ランナコーン、１２・
・・内側ランナコーン、１４・・・外周リング、２０・
・・補第
θ
第
第
図
／、Ｓ
第
図
第
１″７Ｊ
δ
デを来
本 方さ θ月FIG. 1 is a cross-sectional view of a Francis turbine runner cone portion according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view of another embodiment of the present invention. FIG. 4 is an explanatory diagram of another embodiment of the present invention, FIG. 5 is a sectional view of the prior art, and FIG.
The figure is a plan view of the prior art, and FIG. 7 is an explanatory diagram of the flow at the runner exit of the prior art. 10... Auxiliary vane, 11... Runner cone, 12...
...Inner runner cone, 14...Outer ring, 20.
・・Supplementary No. θ No. 1/, S No. 1" 7J δ
Claims (1)
、 前記ランナコーンの内部に補助のベーンを設け、前記補
助ベーンを水車の運転状況により出し入れできるように
したことを特徴とするフランシス水車。 ２、請求項１に記載の前記補助ベーンの代わりに、流路
縮小板を、前記水車の運転状況により出し入れできるよ
うにしたフランシス水車。[Claims] 1. A Francis water turbine comprising a runner vane and a runner cone, characterized in that an auxiliary vane is provided inside the runner cone, and the auxiliary vane can be moved in and out depending on the operating conditions of the water turbine. 2. A Francis turbine, in place of the auxiliary vane according to claim 1, in which a flow path reduction plate can be inserted or removed depending on the operating conditions of the turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2181456A JPH0472468A (en) | 1990-07-11 | 1990-07-11 | Francis turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2181456A JPH0472468A (en) | 1990-07-11 | 1990-07-11 | Francis turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0472468A true JPH0472468A (en) | 1992-03-06 |
Family
ID=16101080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2181456A Pending JPH0472468A (en) | 1990-07-11 | 1990-07-11 | Francis turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0472468A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009115729A2 (en) | 2008-03-05 | 2009-09-24 | Alstom Hydro France | Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel |
| WO2009115730A3 (en) * | 2008-03-05 | 2009-11-12 | Alstom Hydro France | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine which are equipped with such a member |
| JP2011236873A (en) * | 2010-05-13 | 2011-11-24 | Mitsubishi Heavy Ind Ltd | Rotary structure and fluid machine |
| JP2013234621A (en) * | 2012-05-10 | 2013-11-21 | Toshiba Corp | Runner of francis water turbine and francis water turbine |
-
1990
- 1990-07-11 JP JP2181456A patent/JPH0472468A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8721288B2 (en) | 2008-03-05 | 2014-05-13 | Alstom Hydro France | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine equipped with such a member |
| WO2009115730A3 (en) * | 2008-03-05 | 2009-11-12 | Alstom Hydro France | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine which are equipped with such a member |
| WO2009115729A3 (en) * | 2008-03-05 | 2009-11-12 | Alstom Hydro France | Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel |
| CN102016291A (en) * | 2008-03-05 | 2011-04-13 | 阿尔斯通水电设备法国公司 | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine which are equipped with such a member |
| JP2011514475A (en) * | 2008-03-05 | 2011-05-06 | アルストム イドロ フランス | Tip forming member for wheel of hydraulic power device, wheel and hydraulic power device provided with the member |
| JP2011514474A (en) * | 2008-03-05 | 2011-05-06 | アルストム イドロ フランス | Francis-type hydro turbine wheel with tip forming member and method for reducing fluctuations using the wheel |
| AU2009227156B2 (en) * | 2008-03-05 | 2013-12-05 | Alstom Renewable Technologies | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine which are equipped with such a member |
| WO2009115729A2 (en) | 2008-03-05 | 2009-09-24 | Alstom Hydro France | Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel |
| US8894366B2 (en) | 2008-03-05 | 2014-11-25 | Alstom Renewable Technologies | Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel |
| KR101507322B1 (en) * | 2008-03-05 | 2015-03-31 | 알스톰 르네와블 테크놀로지즈 | Francis-type wheel and method of reducing fluctuations in a flow |
| KR101507320B1 (en) * | 2008-03-05 | 2015-03-31 | 알스톰 르네와블 테크놀로지즈 | Tip-forming member for a wheel of a hydraulic machine, and wheel and hydraulic machine which are equipped with such a member |
| JP2011236873A (en) * | 2010-05-13 | 2011-11-24 | Mitsubishi Heavy Ind Ltd | Rotary structure and fluid machine |
| JP2013234621A (en) * | 2012-05-10 | 2013-11-21 | Toshiba Corp | Runner of francis water turbine and francis water turbine |
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