JP3892079B2 - Valve type turbine generator - Google Patents

Valve type turbine generator Download PDF

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Publication number
JP3892079B2
JP3892079B2 JP11828696A JP11828696A JP3892079B2 JP 3892079 B2 JP3892079 B2 JP 3892079B2 JP 11828696 A JP11828696 A JP 11828696A JP 11828696 A JP11828696 A JP 11828696A JP 3892079 B2 JP3892079 B2 JP 3892079B2
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Japan
Prior art keywords
water
valve
turbine generator
channel
dam
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
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JP11828696A
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Japanese (ja)
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JPH09280154A (en
Inventor
宗武 坪田
政夫 菅井
文男 近藤
昌一 久志本
和雄 大谷
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Tohoku Electric Power Co Inc
Fuji Electric Co Ltd
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Tohoku Electric Power Co Inc
Fuji Electric Holdings Ltd
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Priority to JP11828696A priority Critical patent/JP3892079B2/en
Publication of JPH09280154A publication Critical patent/JPH09280154A/en
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    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/50—Hydropower in dwellings
    • 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

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  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Hydraulic Turbines (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、流水路中に設置される立軸のバルブ水車発電機、特にダム上流側に設置されるバルブ水車発電機に関する。
【０００２】
【従来の技術】
図３は従来の横軸バルブ水車発電機を設置した低落差発電所の縦断面図、図４は図３のバルブ水車発電機の縦断面図である。バルブ型水車は落差２５ｍから数ｍの低落差でかつ大流量の地点での水力発電に採用されるチューブラ型水車の一つの形式であり、ランナ径が数ｍの大型機に適用される。流水路内に設置されるバルブ３内に固定子１，回転子２からなる発電機を内蔵している。
バルブ型水車は、流水路内に設置され、大流量の水がバルブの周囲を軸方向に流れるため水の速度が大きい。従って、他の立軸型の水車において一般的に採用されるエルボ型の曲がり吸出し管では、この曲がりに起因する水力損失が大きくなるので、この水力損失が最小となる直線状の吸出し管とするため、バルブ型水車発電機は、回転軸が水平である横軸構成となっていた。
流水路に水平な水車軸５の先端にランナ６が取り付けられ、周方向に配置されたガイドベーン７をリンク機構により開度変化させ流量を調整する。バルブ型水車は、バルブ，ガイドベーン７，ランナ６に作用する水流によるスラストと、水車，発電機の重量とをステーベーン８により支持されている。ステーベーン８の端部は流水路１１を形成するコンクリート基礎構造物９に強固に埋設されている。１２は取水口、１３は吸出し管、２１はダム、２２は発電所建屋、２３はクレーン、２４は取水口ゲート、２５は流水路ゲートである。
【０００３】
【発明が解決しようとする課題】
従来、水車発電機を収納する水力発電所建屋の平面積が必然的に大きくなり、特にバルブ型水車の場合は、水力発電所の建設場所は、発電所建屋の建設スペースまたは敷地が確保し易いダムの直下かまたはダム下流部に限定されていた。また未開発地点においても、地勢上不利な場合には、発電所建設敷地確保や土木コストの関係から開発が見送られてしまうという欠点があった。
【０００４】
横軸の通常のバルブ型水車発電機の場合には、発電所建屋の平面積が大きく、低落差、大流量の未開発水力地点があっても発電所建設敷地確保や土木コストの観点から開発が見送られてしまうことが多く、これらの問題解決したバルブ型水車発電機が望まれていた。
【０００５】
この発明は、従来は地勢上ほとんど検討に値しなかったダムの上流側に建設可能なバルブ型水車発電機を提供することを課題とする。
【０００６】
【課題を解決するための手段】
上記課題を解決するために、この発明は、流水路中に設置されるバルブ型水車発電機において、コンクリート基礎構造物で形成した流水路を、ダムの上流に貯水池の底部から水面上に立ち上げて設け、この流水路内に、前記バルブ型水車発電機をその水車および発電機軸を鉛直にして上方から吊り下げて分解・組立ができるように設置し、さらに、この流水路の取水口および放水路を開閉するゲートを設け、これらのゲートを閉じることにより流水路を締切り、流水路内部から水を排出可能にしたことを特徴とするものである。
この発明においては、流水路を立方向に配置したので、流水路の水平断面積を少なくし狭い場所に設置できる。かつ水車軸及び発電機軸を鉛直にし、流水路を形成するコンクリート基礎構造物に上から吊り下げて組立てまたは分解するため、発電所建屋を小型化できる。
【０００７】
また、流水路をダムの貯水池の底部に配置すれば、バルブ水車発電機を設置する上に好適であり、流水路の水平断面積を少なく、狭い場所に設置できる。かつ、発電所建屋を流水路の上方に設置するため発電所建屋を小型化できる。
【０００８】
【発明の実施の形態】
図１はこの発明の実施の形態を示すバルブ型水車発電機を設置した発電所の縦断面図である。図１において、既設のダム２１にバルブ型水車発電機を設置するときは、水車発電機の設置予定区域に仕切を設け、その区域に溜まっている水を排出する。次いで、立方向の流水路１１ならびに流水路１１の上部に発電所建屋２２，クレーン２３，取水口ゲート２４を設置する。ダム２１の底にトンネルを堀り、吸出し管１３及び放水路トンネル２６を設ける。
【０００９】
図２は図１のバルブ型水車発電機の縦断面図である。 バルブ型水車発電機を組立てるとき、水車軸５及びランナ６からなる水車回転部、スラスト軸受１４、ガイドベーン７などの主要部をステーベーン８に一体に取り付けたまま、クレーン２３で吊り下げる。
４本のステーベーン８は、外側の端部がコンクリート基礎構造物の台部に載せられ、台部９ａに埋め込まれた基礎ボルト１０と締結される。１５はオーバホールのとき作業員が出入りするための点検シャフトである。バルブ３に固定子１と回転子２からなる発電機が内蔵され、回転子２の中心にある発電機軸４は水車軸５と連結されている。バルブ水車発電機２０を据付けたのち、取水口ゲート２４，放水路ゲート２５を開けて、取水口１２から取水し、流水路１１に水を流す。
点検時には、取水口ゲート２４及び放水路ゲート２５を閉じ、水車及び吸出し管に満ちている水を、図示しないポンプで排水した後、組立と逆の順序で分解する。
図１の例はバルブ型水車発電機をダムの貯水池の底に設置した例を示したが、この例とは別に、ダムの上流側から水路により導水し、立方向の流水路と、立軸のバルブ水車発電機をダムの横に設置すれば、ダム上流側の狭い地点にも地勢の影響を受けないで、バルブ型水車発電機を設置できる。
【００１０】
この発明によるバルブ水車発電機は、流水路が立方向なので、流水路の水平断面積は小さくなる。また、バルブ型水車発電機は、立方向に配置され、上からクレーンで吊り下げて組立てるので、組立が容易となる。
さらに、発電所建屋は、流水路及びバルブ型水車発電機の上部に配置されるので、建屋の水平断面積を縮小させる。この発明のバルブ水車発電機は、ダムの上流側に設置されるので、バルブ上部の開口部はそのまま取水口１２となり、特別な取水用土木構造物は不要となり、建屋規模の縮小と合わせて土木建設コストの低減に有利となる。
【００１１】
【発明の効果】
この発明によれば、流水路を立方向としてダムの上流側に配置し、立軸の水車発電機を上から吊り下げて組立または分解する構造としたため、発電所建屋の水平断面積は縮小され、従来地勢的に開発困難であった未開発地点にも、バルブ型水車発電機を設置できる。
また、流水路を既設のダムの貯水池の底部に設ければ、ダムの水を利用して発電所を建設できる。
【図面の簡単な説明】
【図１】この発明の実施の形態を示すバルブ型水車発電機を設置した発電所の縦断面図である。
【図２】図１のバルブ型水車発電機の縦断面図である。
【図３】従来の横軸バルブ型水車発電機を設置した発電所の縦断面図である。
【図４】図３のバルブ水車発電機の縦断面図である。
【符号の説明】
３ バルブ
４ 発電機軸
５ 水車軸
６ ランナ
７ ガイドベーン
８ ステーベーン
９ コンクリート基礎構造物
１０ 基礎ボルト
１１ 流水路
１２ 取水口
１３ 吸出し管
１４ スラスト軸受
２０ バルブ型水車発電機
２１ ダム
２２ 発電所建屋
２３ クレーン
２４ 取水口ゲート
２５ 放水路ゲート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical-axis valve turbine generator installed in a flow channel, and more particularly to a valve turbine generator installed upstream of a dam.
[0002]
[Prior art]
FIG. 3 is a longitudinal sectional view of a low-head power plant in which a conventional horizontal axis valve turbine generator is installed, and FIG. 4 is a longitudinal sectional view of the valve turbine generator of FIG. A valve-type water turbine is a type of tubular water turbine that is employed for hydroelectric power generation at a low head of 25 m to a few meters and having a large flow rate, and is applied to a large machine having a runner diameter of several meters. A generator composed of a stator 1 and a rotor 2 is built in a valve 3 installed in the flow channel.
The valve-type water turbine is installed in the flow channel, and a large flow rate of water flows in the axial direction around the valve, so the water speed is high. Therefore, in the elbow type bent suction pipe generally used in other vertical shaft type water turbines, the hydraulic loss due to this bending becomes large, so that the straight suction pipe that minimizes this hydraulic loss is used. The valve-type water turbine generator has a horizontal axis configuration in which the rotation axis is horizontal.
A runner 6 is attached to the tip of the water wheel shaft 5 that is horizontal to the flow channel, and the flow rate is adjusted by changing the opening degree of the guide vanes 7 arranged in the circumferential direction by a link mechanism. The valve-type water turbine is supported by a stay vane 8 on the valve, the guide vane 7 and the runner 6 and the weight of the water turbine and the generator. The end portion of the stay vane 8 is firmly embedded in the concrete foundation structure 9 that forms the flowing water channel 11. 12 is a water intake, 13 is a suction pipe, 21 is a dam, 22 is a power plant building, 23 is a crane, 24 is a water intake gate, and 25 is a flow channel gate.
[0003]
[Problems to be solved by the invention]
Conventionally, the flat area of the hydroelectric power plant building that houses the turbine generator is inevitably large, especially in the case of valve-type water turbines, it is easy to secure the construction space or site of the power plant building as the construction site of the hydroelectric power plant. It was confined directly below the dam or downstream. Even at undeveloped sites, if there is a disadvantage in the geography, there is a disadvantage that development is not sent due to the construction of the power plant construction site and civil engineering costs.
[0004]
In the case of a normal valve-type water turbine generator on the horizontal axis, the power plant building has a large flat area and is developed from the viewpoint of securing the construction site of the power plant and civil engineering costs even if there is an undeveloped hydropower site with a low head and a large flow rate. In many cases, a valve-type water turbine generator that solves these problems has been desired.
[0005]
An object of the present invention is to provide a valve-type water turbine generator that can be constructed on the upstream side of a dam, which has heretofore hardly been considered in terms of geographical features.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a valve-type water turbine generator installed in a flow channel, and a flow channel formed by a concrete foundation structure is set up on the water surface from the bottom of the reservoir upstream of the dam. The valve-type water turbine generator is installed in the water channel so that it can be disassembled and assembled by suspending it from above with the water turbine and generator shaft vertical. Gates for opening and closing the water channel are provided, and by closing these gates, the water channel is cut off and water can be discharged from the inside of the water channel .
In this invention, since the flowing water channel is arranged in the vertical direction, the horizontal cross-sectional area of the flowing water channel can be reduced and installed in a narrow place. In addition, since the water turbine shaft and the generator shaft are made vertical and are suspended from a concrete foundation structure that forms a flowing water channel from above and assembled or disassembled, the power plant building can be downsized.
[0007]
Further, if the water channel is arranged at the bottom of the reservoir of the dam, it is suitable for installing the valve turbine generator, and the horizontal cross-sectional area of the water channel is small, and it can be installed in a narrow place. In addition, since the power plant building is installed above the water channel, the power plant building can be downsized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a longitudinal sectional view of a power plant provided with a valve-type water turbine generator showing an embodiment of the present invention. In FIG. 1, when installing a valve-type water turbine generator in an existing dam 21, a partition is provided in a planned installation area of the water turbine generator, and water accumulated in the area is discharged. Next, a power plant building 22, a crane 23, and a water intake gate 24 are installed in the vertical flow channel 11 and the upper portion of the flow channel 11. A tunnel is dug in the bottom of the dam 21, and the suction pipe 13 and the discharge channel tunnel 26 are provided.
[0009]
FIG. 2 is a longitudinal sectional view of the valve-type water turbine generator of FIG. When assembling the valve-type water turbine generator, the main portion such as the water turbine rotating portion including the water turbine shaft 5 and the runner 6, the thrust bearing 14, and the guide vane 7 is integrally attached to the stay vane 8 and is suspended by the crane 23.
The four stay vanes 8 are placed on the base portion of the concrete foundation structure at the outer ends and fastened with the foundation bolts 10 embedded in the base portion 9a. Reference numeral 15 denotes an inspection shaft for an operator to enter and exit during an overhaul. A generator including a stator 1 and a rotor 2 is built in the valve 3, and a generator shaft 4 at the center of the rotor 2 is connected to a water wheel shaft 5. After installing the valve turbine generator 20, the water intake gate 24 and the water discharge gate 25 are opened, water is taken from the water intake 12, and water is poured into the water flow passage 11.
At the time of inspection, the intake gate 24 and the discharge channel gate 25 are closed, and the water filled in the water wheel and the suction pipe is drained by a pump (not shown) and then disassembled in the reverse order of assembly.
The example in Fig. 1 shows an example in which a valve-type water turbine generator is installed at the bottom of the reservoir of the dam. Separately from this example, water is led from the upstream side of the dam through the water channel, and the vertical flow channel and the vertical shaft If a valve turbine generator is installed next to a dam, a valve turbine generator can be installed in a narrow spot upstream of the dam without being affected by topography.
[0010]
In the valve turbine generator according to the present invention, the horizontal cross-sectional area of the flow channel is small because the flow channel is vertical. Further, the valve-type water turbine generator is arranged in the vertical direction and is assembled by being suspended from above by a crane, so that the assembly becomes easy.
Furthermore, since the power plant building is disposed above the flow channel and the valve-type water turbine generator, the horizontal sectional area of the building is reduced. Since the valve turbine generator according to the present invention is installed on the upstream side of the dam, the opening at the top of the valve becomes the water intake 12 as it is, and no special civil engineering structure is required. This is advantageous for reducing construction costs.
[0011]
【The invention's effect】
According to the present invention, the horizontal cross-sectional area of the power plant building is reduced because it is arranged on the upstream side of the dam with the flowing water channel as the vertical direction, and the vertical turbine turbine generator is suspended from above and assembled or disassembled. Valve-type water turbine generators can also be installed at undeveloped points, which were difficult to develop in the past.
In addition, if a water channel is installed at the bottom of the reservoir of an existing dam, a power plant can be constructed using the water of the dam.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a power plant provided with a valve-type water turbine generator according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the valve-type water turbine generator shown in FIG.
FIG. 3 is a longitudinal sectional view of a power plant in which a conventional horizontal axis valve-type water turbine generator is installed.
4 is a longitudinal sectional view of the valve turbine generator shown in FIG.
[Explanation of symbols]
3 Valve 4 Generator shaft 5 Turbine shaft 6 Runner 7 Guide vane 8 Stay vane 9 Concrete foundation structure 10 Foundation bolt 11 Flow channel 12 Water intake 13 Suction pipe 14 Thrust bearing 20 Valve type turbine generator 21 Dam 22 Power plant building 23 Crane 24 Inlet gate 25 Drainage gate

Claims (2)

流水路中に設置されるバルブ型水車発電機において、コンクリート基礎構造物で形成した流水路を、ダムの上流に貯水池の底部から水面上に立ち上げて設け、この流水路内に、前記バルブ型水車発電機をその水車および発電機軸を鉛直にして上方から吊り下げて分解・組立ができるように設置し、さらに、この流水路の取水口および放水路を開閉するゲートを設け、これらのゲートを閉じることにより流水路を締切り、流水路内部から水を排出可能にしたことを特徴とするバルブ型水車発電機。In a valve-type water turbine generator installed in a water channel, a water channel formed of a concrete foundation structure is set up on the water surface from the bottom of the reservoir upstream of the dam, and the valve type Install the water turbine generator so that it can be disassembled and assembled by suspending it from above with the water turbine and generator shaft vertical, and also providing gates to open and close the intake and discharge channels of this water flow channel. The valve-type water turbine generator is characterized in that the water channel can be closed by closing and the water can be discharged from the inside of the water channel. 請求項１記載のバルブ型水車発電機において、前記流水路をダムの貯水池の底部に配置したことを特徴とするバルブ型水車発電機。2. The valve-type water turbine generator according to claim 1, wherein the flow channel is arranged at the bottom of a reservoir of a dam.
JP11828696A 1996-04-16 1996-04-16 Valve type turbine generator Expired - Lifetime JP3892079B2 (en)

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Application Number Priority Date Filing Date Title
JP11828696A JP3892079B2 (en) 1996-04-16 1996-04-16 Valve type turbine generator

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Application Number Priority Date Filing Date Title
JP11828696A JP3892079B2 (en) 1996-04-16 1996-04-16 Valve type turbine generator

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Publication Number Publication Date
JPH09280154A JPH09280154A (en) 1997-10-28
JP3892079B2 true JP3892079B2 (en) 2007-03-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4607494B2 (en) * 2004-05-27 2011-01-05 株式会社東芝 Vertical shaft water turbine
CN104452695A (en) * 2014-10-15 2015-03-25 解增友 Downstream ultra-low head tubular turbine power station

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