JPS6079178A - Operation of propeller water-wheel - Google Patents

Operation of propeller water-wheel

Info

Publication number
JPS6079178A
JPS6079178A JP58184963A JP18496383A JPS6079178A JP S6079178 A JPS6079178 A JP S6079178A JP 58184963 A JP58184963 A JP 58184963A JP 18496383 A JP18496383 A JP 18496383A JP S6079178 A JPS6079178 A JP S6079178A
Authority
JP
Japan
Prior art keywords
water
air
valve
vacuum
air supply
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
Application number
JP58184963A
Other languages
Japanese (ja)
Inventor
Toshiro Konno
敏郎 金野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP58184963A priority Critical patent/JPS6079178A/en
Publication of JPS6079178A publication Critical patent/JPS6079178A/en
Pending legal-status Critical Current

Links

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
    • F03B15/00—Controlling
    • 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)
  • Control Of Water Turbines (AREA)

Abstract

PURPOSE:To prevent the leak of water from a vacuum destructing valve and the delay of the starting time of feeding air for destructing vacuum, by pushing- down the water in an air feeding valve for destructing vacuum which is opened into a runner upper chamber and operating the water wheel by controlling the water level always under a certain level. CONSTITUTION:When a propeller water-wheel stops the generation operation, if the opening-degree of a guide vane 2 becomes the min. or a small opening degree in the vicinity of the rated value of revolution speed of the water wheel, the water in a runner upper chamber 5 is drawn-out to a suction pipe 7 side by the pumping action of a runner 8, and the pressure in the runner upper chamber 5 lowers. Therefore, a compressed-air valve 13 connected to an air feeding pipe 9a equipped with a vacuum destructing valve 4 is opened to feed the compressed air in a tank 11 into the air feeding pipe 9a, and the water in the air feeding pipe 9a is pushed down. Then, the water level in the air feeding pipe 9a is kept lower than a certain water-level 14 in the air feeding pipe 9a by automatically controlling the opening and closing of the compressed-air valve 13 by a water- level detecting apparatus 12.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明はプロペラ水車停止時の給気条件を改良し九運転
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for improving air supply conditions when a propeller water turbine is stopped.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

水力発電所のプロペラ水車を発電運転から停止する場合
、水車の回転速度が定格速度又はその近傍で、ガイドベ
ーン開度が全閉又は小開度（無負荷開度以下）になる状
態が発生する。When a propeller turbine at a hydroelectric power plant is stopped from generating operation, the guide vane opening may become fully closed or slightly open (below the no-load opening) when the rotational speed of the turbine is at or near the rated speed. .

プロペラ水車がこのような状態になると、ランナのポン
プ作用により、ランチ上面室の水を吸出管側に吸い出し
てしまいランナ上面室の圧力が低下する。その結果、ラ
ンナを上方に押し上けるいわゆる逆スラストが作用し、
仁の逆スラストが回転部重量を土建ると、回転体がスラ
スト軸受面から飛び上がり、ランナボスが水車カバに撃
突したり、飛び上った後の落下の際、スラスト軸受に衝
撃を与えたりし、機器の損傷につながる場合がある。When the propeller water wheel is in such a state, the water in the launch upper chamber is sucked out to the suction pipe side by the pumping action of the runner, and the pressure in the runner upper chamber decreases. As a result, a so-called reverse thrust that pushes the runner upwards acts.
When the reverse thrust of the engine lifts the weight of the rotating part, the rotating body may fly up from the thrust bearing surface, causing the runner boss to hit the water turbine cover, or when it falls after flying up, it may give an impact to the thrust bearing. , which may lead to equipment damage.

従来この現象の対策として、第１図に示すプロペラ水車
の断面図において、上カバ（３）に備えられた真空破壊
弁（４）により、ランナ上面室（５）に大気以下の負圧
が形成された時点で大気を自然吸入させて、負圧を大気
圧近くまで回復させる方法をとっている。Conventionally, as a countermeasure against this phenomenon, in the cross-sectional view of the propeller-turbine shown in Figure 1, a vacuum breaker valve (4) provided in the upper cover (3) creates negative pressure below atmospheric pressure in the runner upper chamber (5). At this point, air is naturally inhaled to restore the negative pressure to near atmospheric pressure.

又ランナ上面室（５）が負圧になった時に、できるだけ
すみやかに空気を吸入させるために、真空破壊弁（４）
は水車上カバ（３）に設置し、かつ給気管開口部（９）
と真空破壊弁（４）との間の距離をできるかぎり短くな
るよう憂ご配慮している。In addition, in order to suck air as quickly as possible when the runner upper chamber (5) becomes negative pressure, a vacuum breaker valve (4) is installed.
is installed on the water turbine cover (3), and the air supply pipe opening (9)
Care has been taken to keep the distance between the vacuum breaker valve (4) and the vacuum breaker valve (4) as short as possible.

この真空破壊弁（４）に何らかの不具合のために漏水が
生じた場合の排水対策として、真空破壊弁（４）の設置
位置を放水側水位（図示せず）より高くすることを要求
される場合がある。特に無人発電所の場合は重要な問題
となる。このように真空破壊弁（４）を放水側水位より
高くする場合、発電所の条件（洪水水位、発電所連球の
構造等）によっては給気管開口部（９）と真空破壊弁（
４）との間の給気管（９ａ）が長くなり、運転中に配管
のその部分に水が充満していると、真空破壊弁（４）の
動作時に、その水が排出されるに要する時間だけ、実際
に給気開始する時間が遅れ、最悪の場合は回転部の浮き
上り現象を生ずる。As a drainage measure in the event that water leaks due to some malfunction in this vacuum breaker valve (4), the installation position of the vacuum breaker valve (4) must be higher than the water level on the water discharge side (not shown). There is. This is a particularly important issue in the case of unmanned power plants. If the vacuum breaker valve (4) is set higher than the water level on the water discharge side in this way, depending on the conditions of the power plant (flood water level, structure of the power plant relay, etc.), the air supply pipe opening (9) and the vacuum breaker valve (
If the air supply pipe (9a) between the air supply pipe (9a) between the However, the actual start of air supply is delayed, and in the worst case, the rotating parts float up.

〔発明の目的〕[Purpose of the invention]

本発明は従来の構成において真空破壊弁と給気管開口部
との間の水の排出による給気開始の遅れを除去すること
によって、回転部の浮き上りを防止し水車を安全に停止
させることが可能なプロペラ水車の運転方法を提供する
ことを目的としている。The present invention eliminates the delay in the start of air supply due to the discharge of water between the vacuum breaker valve and the air supply pipe opening in the conventional configuration, thereby preventing the rotating parts from floating and safely stopping the water turbine. The purpose is to provide a possible operating method for a propeller water turbine.

〔発明の概要〕[Summary of the invention]

本発明においては、プロペラ水車のランチ上面室に開口
する真空破壊用の給気管内の水を圧縮空気によって押し
下げ、常に一定レベル以下に制御しておくことによって
、給気開始の遅れを除去するものである。In the present invention, the delay in the start of air supply is eliminated by using compressed air to push down the water in the air supply pipe for vacuum breaking, which opens into the launch top chamber of the propeller water turbine, and always controlling it below a certain level. It is.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例１ζついて、第２図を参照して
説明する。尚、第１図にも第２図の部品で同一のものに
は同一符号を付しておくから、従来技術の理解の参考に
供して頂きたい。Hereinafter, one embodiment 1ζ of the present invention will be explained with reference to FIG. Incidentally, parts in FIG. 1 that are the same as those in FIG. 2 are given the same reference numerals, so please use this as a reference for understanding the prior art.

第２図において、（１）はケーシング、（２）はガイド
ベーン、（３）は上カバ、（４）は真空破壊弁、（５）
はランチ上面室、（６）はディスチャージリング、（７
）は吸出管、（８）はランナ、（Ｓａ）は給気管、（９
）は給気管開口部、Ｈは放水側水位、αυは圧縮空気タ
ンク、ａ４は水位検出装置、輪は圧縮空気供給弁、Ｈｔ
ｔ給気管内水位を示す。In Figure 2, (1) is the casing, (2) is the guide vane, (3) is the upper cover, (4) is the vacuum breaker valve, (5) is the
is the launch top chamber, (6) is the discharge ring, (7
) is the suction pipe, (8) is the runner, (Sa) is the air supply pipe, (9
) is the air supply pipe opening, H is the water level on the water discharge side, αυ is the compressed air tank, a4 is the water level detection device, the ring is the compressed air supply valve, Ht
t Indicates the water level in the air supply pipe.

しかして、本実施例においては、圧縮空気供給弁Ｉを開
いて給気管（９ａ）内に圧縮空気を供給し、給気管（９
ａ）内にある水を押し下げ、水位検出装置（ｌ邊により
圧縮空気供給弁（至）を自動開閉制御することにより給
気管（９ａ）内の水位を一定の水位Ｉ以下に保持する。Therefore, in this embodiment, the compressed air supply valve I is opened to supply compressed air into the air supply pipe (9a), and the compressed air is supplied into the air supply pipe (9a).
a) The water level in the air supply pipe (9a) is maintained below a certain water level by pressing down the water in the air supply pipe (9a) and automatically controlling the opening and closing of the compressed air supply valve (to) using the water level detection device (l side).

次に作用について説明する。Next, the effect will be explained.

圧縮空気供給弁α樽を開くことにより真空破壊弁（４）
と給気管開口部（９）との間の給気管（９ａ）内に充満
している水を排除することができる。また水位検出装置
員により圧縮空気供給弁ａ埠を開閉させることにより、
給気管（９ａ）内の水位をある決められた水位ａ◆以下
に自動的に保持することができる。Vacuum break valve (4) by opening the compressed air supply valve α barrel
Water filling the air supply pipe (9a) between the air supply pipe opening (9) and the air supply pipe opening (9) can be removed. In addition, by opening and closing the compressed air supply valve a by the water level detection equipment personnel,
The water level in the air supply pipe (9a) can be automatically maintained below a certain determined water level a◆.

従って、真空破壊弁（４）の漏水を防ぐために、真空破
壊弁（４）を放水側水位ａ呻より高い位置に設置し、そ
のため途中の配管が長くなる場合でも、本実施例のよう
に給気管（９ａ）内の水を大部分排除し、極力低いある
定められた水位ａ弗以下に保持しながら運転すれば、背
景技術の問題点として述べた給気開始の遅れは問題にな
らない程小さくできる。Therefore, in order to prevent water leakage from the vacuum breaker valve (4), the vacuum breaker valve (4) is installed at a position higher than the water level on the water discharge side. If most of the water in the trachea (9a) is removed and the system is operated while keeping the water level below a certain level as low as possible, the delay in the start of air supply mentioned as a problem in the background art will be so small that it will not become a problem. can.

〔発明の効果〕〔Effect of the invention〕

上述のように本発明によると、真空破壊弁の漏水問題と
真空破壊のための給気の開始時間の遅れの問題を両方共
解決できるために、従来より信頼性の高いプロペラ水車
の運転方法を提供することができる。As described above, according to the present invention, both the problem of water leakage from the vacuum breaker valve and the problem of the delay in the start time of air supply for vacuum breaker can be solved. can be provided.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の運転方法を実施していたプロペラ水車を
示す断面図、第２図は本発明の１実施例を実施している
プロペラ水車の状態を示す断面図である。 １・・・ケーシング　２・・・ガイドベーン３・・・上
カバ　４・・・真空破壊弁 ５・・・ランナ上面室　６・・・ディスチャージリング
７・・・吸出管　８・・・ランチ ９ａ・・・給気管　９・・−給気管開口部１０・・・放
水側水位　１１・・・圧縮空気タンク１２・・・水位検
出装置　１３・・・圧縮空気供給弁１４・・・給気管内
水位 代理人　弁理士　井　上　−男 第　１　図 第　２　図FIG. 1 is a sectional view showing a propeller water turbine in which a conventional operating method is implemented, and FIG. 2 is a sectional view showing a state of a propeller water turbine in which an embodiment of the present invention is implemented. 1... Casing 2... Guide vane 3... Upper cover 4... Vacuum breaker valve 5... Runner top chamber 6... Discharge ring 7... Suction pipe 8... Lunch 9a. ...Air supply pipe 9...-Air supply pipe opening 10...Water level on the water discharge side 11...Compressed air tank 12...Water level detection device 13...Compressed air supply valve 14...Substitute for water level in the air supply pipe Person Patent Attorney Inoue - Male Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] プロペラ水車のランナ上面室に開口する真空破壊用の給
気管内の水を圧縮空気によって押し下げ常に一定レベル
以下に制御しながら運転することを特徴とするプロペラ
水車の運転方法。A method for operating a propeller water turbine, characterized in that the water in the air supply pipe for vacuum breaking, which opens into the upper chamber of the runner of the propeller water turbine, is pushed down by compressed air and the water is constantly controlled to be below a certain level during operation.
JP58184963A 1983-10-05 1983-10-05 Operation of propeller water-wheel Pending JPS6079178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58184963A JPS6079178A (en) 1983-10-05 1983-10-05 Operation of propeller water-wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58184963A JPS6079178A (en) 1983-10-05 1983-10-05 Operation of propeller water-wheel

Publications (1)

Publication Number Publication Date
JPS6079178A true JPS6079178A (en) 1985-05-04

Family

ID=16162408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58184963A Pending JPS6079178A (en) 1983-10-05 1983-10-05 Operation of propeller water-wheel

Country Status (1)

Country Link
JP (1) JPS6079178A (en)

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