JPS59203880A - Reduction of vibration of multistage pump water wheel - Google Patents

Reduction of vibration of multistage pump water wheel

Info

Publication number
JPS59203880A
JPS59203880A JP58076150A JP7615083A JPS59203880A JP S59203880 A JPS59203880 A JP S59203880A JP 58076150 A JP58076150 A JP 58076150A JP 7615083 A JP7615083 A JP 7615083A JP S59203880 A JPS59203880 A JP S59203880A
Authority
JP
Japan
Prior art keywords
air supply
valve
air
main shaft
vibration
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
JP58076150A
Other languages
Japanese (ja)
Inventor
Seiji Miura
三浦　誠二
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58076150A priority Critical patent/JPS59203880A/en
Publication of JPS59203880A publication Critical patent/JPS59203880A/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
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis 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
    • F03B11/002—Injecting air or other fluid
    • 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

PURPOSE:To restrict unstable flow upon transitional operation by feeding air forcibly by opening a valve on the way of an air feeding pipe. CONSTITUTION:A feed air path 6 and the air feeding pipe 4 are provided with the valves 8, 9. When abnormal flow condition is generated, signals to open quickly the valves 9, 8 are sent from a valve control unit and the valves 9, 8 are opened quckly. Then, high pressure air is poured forcibly into the flow path from a high pressure air reservoir 7. According to this method, the unstable vibration of the flowing fluid is restricted. Accordingly, the fluctuation of hydraulic pressure may be reduced and vibrations of a runner 2 and the surrounding structures thereof may be reduced.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は多段ポンプ水車の過渡運転時の不安定流動によ
るランナやその周囲構造物の振動低減に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to reducing vibrations of a runner and its surrounding structures due to unstable flow during transient operation of a multi-stage pump turbine.

〔発明の背景〕[Background of the invention]

ポンプ水車の負荷遮断時、入力遮断時には庄段。 Shodan when the load of the pump-turbine is cut off or the input cut off.

多多段の別なく不安定な流動状態が発生するために第１
図、第２図に示すようにランナ周囲の水圧変動が大きく
、まだ、ランナ、上カバー等は大きな振動を発生する。The first problem is that unstable flow conditions occur regardless of the number of stages.
As shown in Fig. 2, the water pressure around the runner fluctuates greatly, and the runner, upper cover, etc. still generate large vibrations.

そして、ランナの振動が異常に大きくなった場合には静
止部との接触事故も起とシうる。さらに、”Ｒ囲の構造
物は異常な高応力を受けて材料強度的観点からも好まし
くない状態にさらされる。従来、上記のような過渡運転
時の振動は過渡運転時の流動状態が定常時の流動状態と
は全く異なるので、当然発生するものと見做され、対策
に関しては遮断時の水圧鉄管入口圧力と基準圧力とを比
較し、両者の差圧に応じて入口側と吸出側とを連通ずる
制圧機の弁を開閉操作するといったよ５な運転方法を制
御して水圧上昇等を抑制する方式が試みられている。該
方式による場合には基準圧力設定器とか差圧発信器、大
規模な制圧用管路等の複雑な系統の構成を主機の外に必
要とする。また、ランチや吸出管の振動低減のために、
ランナとガイドベーンとの空間に管体の−端を臨ませて
、ランチ内に核管によシ給気を行い、振動を低減する方
法、及び、上カバー側から背圧室への給気による振動低
減方法が考案されているが、これらの方法によると、そ
うでなくても単段ポンプ水車よシはるかに構造が複雑な
多段ポンプ水車の場合には従来構造に加えて上カバー、
若しくは下カバ一部に管体を貫通させる構成が必要とな
シ、上下カバ一部の構造がいっそう複雑化し、製作費１
組立費及び工数の増大を余儀なくさせる。In addition, if the vibration of the runner becomes abnormally large, there is a possibility that an accident of contact with a stationary part may occur. Furthermore, structures in the radius radius are subjected to abnormally high stress and are exposed to conditions that are unfavorable from the viewpoint of material strength. Conventionally, the vibrations during transient operation as described above occur when the flow state during transient operation is steady. Since the flow state is completely different from the flow state of Attempts have been made to control increases in water pressure by controlling various operating methods, such as opening and closing the valves of communicating pressure regulators. A complicated system configuration such as a large-scale pressure control pipe is required outside the main engine.In addition, to reduce vibration of the launch and suction pipes,
A method for reducing vibration by supplying air to the core tube in the launch by making the -end of the tube face the space between the runner and the guide vane, and supplying air to the back pressure chamber from the upper cover side. However, according to these methods, in the case of a multi-stage pump turbine, which has a much more complex structure than a single-stage pump turbine, in addition to the conventional structure, an upper cover,
Alternatively, it is necessary to have a structure in which the tube penetrates a part of the lower cover, and the structure of the upper and lower covers becomes even more complicated, increasing the production cost by 1.
This necessitates an increase in assembly costs and man-hours.

ところで、本発明で対象としている過渡運転時とは異な
るが水車軽負荷運転時のランチ下部から吸出管にかけて
発生する空洞による振動を回避する目的でランチ下部に
設けた給気管によって給気する方法があるが、ポンプ水
車の場合、ランチの吸込側に強度不安定な障害物がある
として妹達されがちである。By the way, although it is different from the transient operation targeted by the present invention, there is a method of supplying air with an air supply pipe provided at the bottom of the launch for the purpose of avoiding vibrations caused by the cavity that occurs from the bottom of the launch to the suction pipe during light load operation of the water turbine. However, in the case of pump turbines, it is often criticized for having unstable obstacles on the suction side of the launch.

〔発明の目的〕 本発明の目的は上記した従来技術の欠点をなくし、構造
簡単にして、しかも効果的に負荷遮断。[Object of the Invention] The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, simplify the structure, and effectively shed the load.

入力遮断等の過渡運転時の不安定流動を抑制し、ランチ
及びランナ周囲構造物の振動低減を可能ならしめるポン
プ水車の運転方法を提供することにある。An object of the present invention is to provide a method for operating a pump-turbine that suppresses unstable flow during transient operation such as input cutoff, and enables vibration reduction of structures surrounding the launch and runner.

〔発明の概要〕[Summary of the invention]

本発明の特徴は主軸あるいはランナクラウン流水面の所
定の流水部に外部給気源と連通ずる複数の給気孔を設け
、該給気孔からランナ及びその周囲に、大きな振動の発
生が予想される運転状態の際に適宜給気管途中の弁を開
けて、強制給気することによって不安定流動を断ち切り
、あるいは、流動流体の変動エネルギを緩衝し、不安定
流動によるランチ及びその周囲構造物の振動を低減する
点にある。A feature of the present invention is that a plurality of air supply holes communicating with an external air supply source are provided in a predetermined water flow section of the main shaft or runner crown water surface, and the operation in which large vibrations are expected to occur from the air supply holes to the runner and its surroundings is provided. In such a situation, the unstable flow can be cut off by opening the valve in the air supply pipe as appropriate and supplying air forcibly, or the fluctuating energy of the flowing fluid can be buffered, and the vibration of the launch and its surrounding structures due to unstable flow can be reduced. It is in the point of reducing.

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

以下、本発明の一実施例を第３図を参照して説明する。 An embodiment of the present invention will be described below with reference to FIG.

第３図において１は主軸、２はランチ、３は給気孔、４
は主軸内の給気管、５は主軸と給気通路との連結部であ
る。６は給気通路で外部給気源である高圧貯気槽７に連
通している。捷た、給気通路途中に運転制御部と連結し
ている弁制御部からの信号によって開閉する弁８、及び
、給気管４の途中に前記と同様な信号によって開閉する
弁９が設置されている。弁９は通常は閉鎖されており、
高圧側の流水が給気管４を自由に通シ抜けて低圧側へ流
出するのを防止している。本実施例は上記のように構成
したので、負荷遮断及び入力遮断の必要が発生した場合
、あるいは異常な流動状態が発生した場合、運転制御部
から弁制御部に上記運転状況を知らせる信号が送られ、
弁制御部から弁９．弁８を急開する信号が送られ、弁９
゜弁８は急開し、７の高圧貯気槽からの高圧空気を３の
給気孔から流路内に強制注入することによシ、流動流体
の不安定動揺を抑制することができる。In Figure 3, 1 is the main shaft, 2 is the launch, 3 is the air supply hole, and 4
5 is an air supply pipe in the main shaft, and 5 is a connecting portion between the main shaft and the air supply passage. An air supply passage 6 communicates with a high-pressure air storage tank 7 which is an external air supply source. A valve 8 that opens and closes in response to a signal from a valve control section connected to the operation control section is installed in the middle of the air supply passage, and a valve 9 that opens and closes in response to the same signal as described above is installed in the middle of the air supply pipe 4. There is. Valve 9 is normally closed;
Water on the high pressure side is prevented from freely passing through the air supply pipe 4 and flowing out to the low pressure side. Since this embodiment is configured as described above, when it becomes necessary to cut off the load or cut off the input, or when an abnormal flow condition occurs, a signal is sent from the operation control section to the valve control section to inform the valve control section of the above operation status. is,
Valve 9 from the valve control section. A signal to suddenly open valve 8 is sent, and valve 9
By opening the valve 8 suddenly and forcibly injecting high pressure air from the high pressure air storage tank 7 into the flow path through the air supply hole 3, it is possible to suppress unstable oscillations of the flowing fluid.

その結果、水圧変動は軽減する。同時に、ランチ及びそ
の周囲構造物の振動は減少する。効果の例を第４図に示
す。該給気孔及び給気装置は揚水操作を空中起動から開
始する際の水面押下げ用にも並用できる。また、給気通
路６を分岐させて１０の排気孔と連通可能にしておけは
充水時の排気用としても該給気孔は並用できる。さらに
弁９の開閉を各位置で調整して異常軸スラスト発生時に
高圧水を低圧側へ逃がしてやることもできる。ところで
、弁制御部は調速機等と連動させることも可能である。As a result, water pressure fluctuations are reduced. At the same time, vibrations of the launch and its surrounding structures are reduced. An example of the effect is shown in FIG. The air supply hole and the air supply device can also be used for pushing down the water surface when starting the pumping operation from the air. Furthermore, if the air supply passage 6 is branched to communicate with the 10 exhaust holes, the air supply holes can also be used for exhaust during water filling. Further, by adjusting the opening and closing of the valve 9 at each position, high pressure water can be released to the low pressure side when abnormal shaft thrust occurs. By the way, the valve control section can also be linked with a speed governor or the like.

また、給気孔３の開孔位置、開孔面積。Also, the opening position and opening area of the air supply hole 3.

孔数及び弁９の位置や寸法は給気量の大小、ポンプ水車
の寸法や特性等によって適宜選定されることは勿論であ
る。Of course, the number of holes and the position and dimensions of the valve 9 are appropriately selected depending on the amount of air supply, the dimensions and characteristics of the pump-turbine, etc.

〔発明の効果〕〔Effect of the invention〕

本発明によれば従来構造に対して大幅な変更はなく、き
わめて簡単な構造によシ、負荷遮断、入力遮断等の過渡
運転時に発生する水圧変動に伴うランナ及びその（資）
囲構造物の振動を低減させることができる。According to the present invention, there are no major changes to the conventional structure, and the runner and its materials are used in response to water pressure fluctuations that occur during transient operations such as load cutoff and input cutoff.
Vibration of the surrounding structure can be reduced.

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

第１図、第２図は２段ポンプ水車の負荷遮断時、入力遮
断時それぞれにおける特性曲線図、第３図は本発明の一
実施例を示す２段ポンプ水車の縦断面図、第４図は本発
明の効果を示すポンプ水車の負荷遮断時の特性曲線図で
ある。 ｌ・・・主軸、グ・・・ランナ、４・・・給気管、７・
・・高圧貯宅１図 先２図 日１１ １−1 and 2 are characteristic curve diagrams of the two-stage pump-turbine at load cutoff and input cutoff, respectively. FIG. 3 is a vertical cross-sectional view of the two-stage pump-turbine showing an embodiment of the present invention. FIG. 4 FIG. 2 is a characteristic curve diagram of a pump-turbine during load shedding, showing the effects of the present invention. l...main shaft, ground...runner, 4...air supply pipe, 7.
・High pressure storage 1st figure destination 2nd figure day 11 1-

Claims (1)

【特許請求の範囲】[Claims] １、主軸あるいはランチクラウンの流水面に、主軸内部
の給気管と連通ずる給気孔を有し、該給気管には主軸方
向の流体の流動を弁制御部からの信号によって開閉する
弁（９）を有し、さらに、該給気管は主軸端部の連結部
で弁制御部からの信号によって開閉する弁（８）を介し
て外部給気源と連通している多段ボング水車妊於て、ポ
ンプ水車の過渡運転時に、弁制御部からの信号によって
前記弁（９）を開き、さらに前記弁（８）を開いて、前
記給気孔よシ強制的に流路に給気することを特徴とする
多段ポンプ水車の振動低減方法。1. The water supply surface of the main shaft or launch crown has an air supply hole that communicates with the air supply pipe inside the main shaft, and the air supply pipe has a valve (9) that opens and closes the flow of fluid in the direction of the main shaft according to a signal from the valve control section. In a multi-stage bong water turbine, the air supply pipe communicates with an external air supply source via a valve (8) that opens and closes in response to a signal from a valve control unit at a connecting portion at the end of the main shaft. During transient operation of the water turbine, the valve (9) is opened in response to a signal from the valve control section, and the valve (8) is further opened to forcibly supply air to the flow path through the air supply hole. Vibration reduction method for multi-stage pump turbines.
JP58076150A 1983-05-02 1983-05-02 Reduction of vibration of multistage pump water wheel Pending JPS59203880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58076150A JPS59203880A (en) 1983-05-02 1983-05-02 Reduction of vibration of multistage pump water wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58076150A JPS59203880A (en) 1983-05-02 1983-05-02 Reduction of vibration of multistage pump water wheel

Publications (1)

Publication Number Publication Date
JPS59203880A true JPS59203880A (en) 1984-11-19

Family

ID=13596986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58076150A Pending JPS59203880A (en) 1983-05-02 1983-05-02 Reduction of vibration of multistage pump water wheel

Country Status (1)

Country Link
JP (1) JPS59203880A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021112811A1 (en) * 2019-12-06 2021-06-10 Иван Иванович КОТУРБАЧ Low-cost anti-cavitation hydraulic turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021112811A1 (en) * 2019-12-06 2021-06-10 Иван Иванович КОТУРБАЧ Low-cost anti-cavitation hydraulic turbine

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