JPS60187775A - Needle valve control device for pelton water turbine - Google Patents

Needle valve control device for pelton water turbine

Info

Publication number
JPS60187775A
JPS60187775A JP59044750A JP4475084A JPS60187775A JP S60187775 A JPS60187775 A JP S60187775A JP 59044750 A JP59044750 A JP 59044750A JP 4475084 A JP4475084 A JP 4475084A JP S60187775 A JPS60187775 A JP S60187775A
Authority
JP
Japan
Prior art keywords
needle valve
force
valve
opening direction
arm
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
JP59044750A
Other languages
Japanese (ja)
Inventor
Shigekatsu Naka
中　茂勝
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 JP59044750A priority Critical patent/JPS60187775A/en
Publication of JPS60187775A publication Critical patent/JPS60187775A/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
    • F03B1/00—Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto
    • F03B1/04—Nozzles; Nozzle-carrying members
    • 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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  • 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 keep the needle valve under a no-load condition at all times by a method wherein the length of an arm, which is formed between a rotating shaft and a contact point of a wire, is made long at a position whereat a force in the opening direction of the valve becomes large and the same is made short at a position whereat the force in the same direction becomes small. CONSTITUTION:The variable radius arm 14 is formed into the shape of a cam plate, in which the rotating radius thereof is changed continuously. The rotating radius, connecting the contact point P1 of the wire and a rotating center O, becomes the maximum value R1 at the fully closed position of the needle valve 3 while the contact point with the second connecting wire 16 moves on a route shown by the points P2, P3 in accordance with the movement to open the needle valve 3. Then the rotating radius decreases gradually as shown by the signs R2, R3 and the rotating radius R6 becomes the minimum valve at the fully opened position of the needle valve 3. According to this method, the needle valve may be kept under no-load condition substantially.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、ペルトン水車のニードル弁制御装置に係り、
特にニードル弁の平衡を保つよう負荷される弁開方向荷
重をノズル噴射水力による弁閉方向力の変動に追従させ
る装置を設けることにより、小型で信頼性の高いペルト
ン水車のニードル弁制御装置を提供することを目的とす
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a needle valve control device for a Pelton water turbine.
In particular, by providing a device that makes the load in the valve opening direction, which is applied to keep the needle valve balanced, follow the fluctuations in the force in the valve closing direction due to the hydraulic force injected from the nozzle, we provide a compact and highly reliable needle valve control device for a Pelton water turbine. The purpose is to

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

一般に、ペルトン水車は、第１図圧示すようなノズルｌ
を備え、このノズル／から図示を省略し九ランナに噴射
水流コが射出されるよう釦なっている。また、ノズル／
の内部には、軸方向に往復移動するニードル弁３が配設
され、このニードル弁３によって上記噴射水流−の流量
が負荷延対応するよう調整されている。さらに上記ニー
ドル弁３は、図示を省略した調速機に付属するサーボモ
ータ（油圧シリンダ）４Ｉによシ作動されるとともＫ、
該サーボモータグとの連結部分にスタンド３が立設され
、このスタンドＳの連結のワイヤ７を介して弁開方向荷
重として作用する錘り６が連結されている。Generally, a Pelton turbine has a nozzle as shown in Figure 1.
This nozzle is provided with a button so that a water jet (not shown) is ejected from the nozzle to nine runners. Also, the nozzle/
A needle valve 3 that reciprocates in the axial direction is disposed inside the pump, and the needle valve 3 adjusts the flow rate of the jet water flow to correspond to the load spread. Further, the needle valve 3 is operated by a servo motor (hydraulic cylinder) 4I attached to a speed governor (not shown).
A stand 3 is erected at the connection to the servo motor tag, and a weight 6 that acts as a load in the valve opening direction is connected via a connecting wire 7 to the stand S.

すなわち、上記ニードル弁３は上記噴流−の射出力によ
り弁閉方向力Ｍｈを常時受けるが、上述のような錘り６
を設けておけば、ニードル弁３を開放する際に上記飾り
６による弁開方向力ｌＦｒ０分だけニードル弁３の開放
操作力Ｆを低減させることができる。そして、この結果
、サーボモータグおよびその周辺機器を小型にすること
ができるととも忙、ニーＰル弁コの調整を正確紀行うこ
とができる。That is, the needle valve 3 always receives a force Mh in the valve closing direction due to the injection force of the jet flow, but the above-mentioned weight 6
By providing this, when opening the needle valve 3, the opening operation force F of the needle valve 3 can be reduced by the valve opening direction force lFr0 due to the decoration 6. As a result, the servo motor tag and its peripheral equipment can be made smaller, and the needle valve can be adjusted more accurately.

第一図は、縦軸の上向側にニードル弁３の弁閉方向作用
力を、また縦軸の下向側圧弁開方向作用力をそれぞれと
るとともに、横軸にノズル開度をとったものｆある。ま
ず本図中線図１で表わすようにノズルｌからの噴射水流
−による弁閉方向力Ｍｈは、全閉位置近傍で最大値Ｍｈ
ｍａｘを有するとともに、ノズル開度の増大に従って次
第に減少していく。一方、線図■で表す錘シロによる弁
開方向力Ｆｒは、常に一定の値である。そして、との弁
開方向力Ｆｒを大きめ、たとえば上記最大弁閉方向力Ｍ
ｈ　ｍａｗに等しくなるように設定すると、該弁開方向
力Ｆｒと弁閉方向力Ｍｈとの合成力は線図■で表され、
この合成力■が常時弁開方向力としてニードル弁３に作
用する。したがって、ニーｙル弁３を開放するときには
線図■で表すサーボモータグの弁開操作力Ｆはほとんど
不要になる。In Figure 1, the upward side of the vertical axis represents the force acting on the needle valve 3 in the valve closing direction, the vertical axis represents the force acting on the downward side of the pressure valve in the opening direction, and the horizontal axis represents the nozzle opening degree. There is f. First, as shown in diagram 1 in this figure, the force Mh in the valve closing direction due to the jet water flow from the nozzle l has a maximum value Mh near the fully closed position.
max, and gradually decreases as the nozzle opening increases. On the other hand, the valve-opening direction force Fr due to the weight margin represented by the diagram ■ is always a constant value. Then, the valve opening direction force Fr is increased, for example, the maximum valve closing direction force M
When set to be equal to h maw, the resultant force of the valve opening direction force Fr and the valve closing direction force Mh is represented by the diagram ■,
This resultant force (2) always acts on the needle valve 3 as a force in the valve opening direction. Therefore, when the needle valve 3 is opened, the valve opening operation force F of the servo motor tag shown in the diagram (■) is almost unnecessary.

外お、この場合、ニードル弁３に作用する弁開操作力は
、線図■と線図■とを合成して得られる線図■で表され
ることＫなる。In addition, in this case, the valve opening operation force acting on the needle valve 3 is represented by the diagram ■ obtained by combining the diagram ■ and the diagram ■.

一方、ニードル弁３を閉じる場合には、線図■で表した
サーボモータｑによる弁閉操作力Ｆ′と、線図Ｉで表し
た弁閉方向力Ｍｈと線図■で表した錘り乙による弁開方
向力Ｆｒとの３力合成力（線図■）がニードル弁Ｊに作
用する。ところが、この線図■で表される合成作用力は
、ノズルの全閉状態（Ｏチ開度）からａ％開度まではニ
ードル弁３に弁閉方向力として作用するが、ａチ開度以
上では逆に弁開方向力として作用する。このため、ａチ
開度以上に開放された状態からは小型のサーボモータｔ
ではニーｒル弁コを閉じることができないこととなる。On the other hand, when closing the needle valve 3, the valve closing operation force F' by the servo motor q shown in the diagram ■, the valve closing direction force Mh shown in the diagram I, and the weight B shown in the diagram ■ A three force resultant force (diagram ■) with the valve opening direction force Fr acts on the needle valve J. However, the resultant acting force represented by this diagram ■ acts on the needle valve 3 as a force in the valve closing direction from the nozzle fully closed state (O opening) to a% opening; In the above case, the force acts conversely as a force in the valve opening direction. For this reason, from the state where a is opened beyond the opening degree, the small servo motor t
In this case, the needle valve cannot be closed.

これを解決するために、錘り６を軽くして弁開方向力Ｆ
ｒを小さくすれば、上述のような弁動作不能状態はなく
すことができるが、錘＃）６を軽くしだ分だけサーボモ
ータグを大型の大出力のものにしなければならず、錘り
６を設ける効果が十分得られなかった。In order to solve this problem, the weight 6 is made lighter and the valve opening direction force F
If r is made smaller, the above-mentioned non-operational state of the valve can be eliminated, but the servo motor tag must be made larger and have a higher output to compensate for the weight #6 being made lighter, and the weight #6 is provided. The effect was not sufficient.

〔発明の目的〕[Purpose of the invention]

そこで本発明は、このような従来のニードル弁制御装着
の欠点を解消し、小型で信頼性の高いペルトン水車のニ
ードル弁制御装置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 eliminate such drawbacks of the conventional needle valve control installation and to provide a small and highly reliable needle valve control device for a Pelton water turbine.

〔発明の概要〕[Summary of the invention]

上記目的を達成するため、本発明によるペルトン水車の
ニードル弁制御装置は、カム板状の半径可変アームを介
してニードル弁と弁開方向荷重とをワイヤ連結してなり
、上記半径可変アームの回転軸とワイヤ接点との間に形
成されるアーム長は、ノズル噴射水力による弁開方向力
が大きくなる位置にて長く形成されかつノズル噴射水力
による弁開方向力が小さくなる位置にて短くなるように
形成されていることを特徴とし、ノズル噴射水力による
弁開方向力の変動に対応して弁開方向荷重を変動させる
ようにしている。In order to achieve the above object, a needle valve control device for a Pelton water turbine according to the present invention connects a needle valve and a load in the valve opening direction with a wire via a variable radius arm in the form of a cam plate, and rotates the variable radius arm. The length of the arm formed between the shaft and the wire contact point is longer at the position where the force in the valve opening direction due to the nozzle jet hydraulic force is large and becomes shorter at the position where the valve opening direction force due to the nozzle jet hydraulic force is small. The load in the valve opening direction is varied in response to the variation in the force in the valve opening direction due to the nozzle jet hydraulic force.

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

以下、本発明の実施例を図面に基いて詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.

第１図に示したペルトン水車のニードル弁制御装着と同
一構成物を同一符号で表した第３図において、ニードル
弁３とサーボモータグとの連結部分にスタンＰＳが立設
され、このスタンｒＳの先端部分に第１連結ワイヤＩ／
が連結されるとともに、この第７連結ワイヤ／／の先端
部分は、回転軸／コの一端側に固定された扇板状の半径
固定アーム／Ｊに巻付けられている。上記半径固定アー
ム１３は、一定の回転半径ＲＯを備え、回転軸！−から
該半径固定アーム１３に加えられたトルクＴ０が上記第
１連なりている。In FIG. 3, in which the same components as the needle valve control installation of the Pelton turbine shown in FIG. The first connecting wire I/
are connected, and the tip portion of the seventh connecting wire // is wrapped around a fan-shaped radius fixed arm /J fixed to one end of the rotating shaft /J. The fixed radius arm 13 has a constant rotation radius RO, and has a rotation axis! - The torque T0 applied to the fixed radius arm 13 is the first series.

さらに、前記回転軸１２の他端側には、半径可変アーム
ｌｌＩが固定され、この半径可変アーム／りは、上記ニ
ードル弁３の往復移動に伴ッて半径固定アーム１３と一
体的に回動するようになっている。そして、上記半径可
変アーム／ダには、錘り／Ｓを垂下する第一連結ワイヤ
／６が巻付けられている。これによって上記半径可変ア
ーム／ダは、錘り／Ｓから第３図右回りの回転モーメン
トすなわちトルクＴ。Further, a variable radius arm LLI is fixed to the other end of the rotating shaft 12, and this variable radius arm rotates integrally with the fixed radius arm 13 as the needle valve 3 reciprocates. It is supposed to be done. A first connecting wire /6 that hangs down the weight /S is wound around the variable radius arm /da. As a result, the variable radius arm/da receives a clockwise rotation moment, ie, torque T, from the weight/S in FIG.

を受け、上述のように、このトルクＴｏに基いてニード
ル弁３に開方向力Ｆｒを常時付与している。In response to this, as described above, an opening direction force Fr is constantly applied to the needle valve 3 based on this torque To.

また、上記半径可変アーム／４１は１回転半径が連続的
に変化するカム板状に形成されている。すなわち、第４
図に示すように、ニードル弁３の全閉位置（第１図の状
態）でワイヤ接点Ｐｌと回転中心０とを結ぶ回転半径は
、最大値Ｒ１を有する。さらに、ニードル弁３の開放移
動に伴い第コ連結ワイヤ１６との接点がＰ＠　、Ｐ３　
＊　Ｐ４　’　”のように移動していくと、回転半径は
、　Ｒ２、ＲＢ　、Ｒ４＋Ｒ６のように次第に小さくな
っていく。そして、ニードル弁３の全開位置でワイヤ接
点Ｐ６に対して回転半径は最小値Ｒ６となる。Further, the variable radius arm/41 is formed in the shape of a cam plate whose radius of one rotation changes continuously. That is, the fourth
As shown in the figure, the radius of rotation connecting the wire contact Pl and the rotation center 0 when the needle valve 3 is in the fully closed position (the state shown in FIG. 1) has a maximum value R1. Furthermore, as the needle valve 3 moves to open, the contact point with the No. 1 connecting wire 16 becomes P@, P3.
* As you move like P4 ''', the radius of rotation gradually becomes smaller like R2, RB, R4+R6.Then, at the fully open position of the needle valve 3, the radius of rotation becomes the minimum with respect to the wire contact P6. The value becomes R6.

このよう表構成からなるペルトン水車のニードル弁制御
装置においては、上述のように、錘り／３の下向荷重Ｗ
は、第一連結ワイヤ／６および半径可変アーム／４１を
介して回転軸／Ｊに弁開方向トルクＴ。In the needle valve control device for a Pelton turbine having such a table configuration, as described above, the downward load W of weight/3 is
is a torque T in the valve opening direction applied to the rotating shaft /J via the first connecting wire /6 and the variable radius arm /41.

を付与する。さらに、この回転軸７．２に付与された弁
開方向トルクＴｏは、半径固定アーム１３および第１連
結ワイヤ／／を介してニーＩＦル弁３に弁開方向力Ｆｒ
として伝達される。Grant. Furthermore, the valve opening direction torque To applied to this rotating shaft 7.2 is applied to the knee IF valve 3 via the radius fixed arm 13 and the first connecting wire // to the valve opening direction force Fr.
It is transmitted as

第３図は、第一図と同様に、縦軸の上向側にニードル弁
３の弁閉方向力を、また縦軸下向側に弁開方向力をそれ
ぞれとるとともに、横軸にノズル開度をとったものであ
る。そして、図中線図Ａは、第２図と同様のノズル噴射
水流による弁閉方向力Ｍｈである。また、本図中、線図
Ｂは、本発明により得られる弁開方向力Ｆｒを表してお
り、との弁開方向力Ｆｒはノズル開度に比例して変動す
るようになっている。すなわち、錘り１３の下向荷重Ｗ
から半径可変アーム／ｑをブＮ、て付与される弁開方向
のトルクＴｏは、上記半径可変アームｌｑの回転半径に
比例した大きさを有する。たとえば、半径可変アーム／
４（と第コ連結ワイヤ１６との各接点ｐ１．ｐ２．・・
・＋Ｐ６における回転半径はＲ１＋Ｒ２、・・・＋Ｒ６
であシ、上記弁開方向トルクＴ。In Fig. 3, as in Fig. 1, the force in the valve closing direction of the needle valve 3 is taken on the upward side of the vertical axis, the force in the valve opening direction is taken on the downward side of the vertical axis, and the nozzle opening is taken on the horizontal axis. It was taken to a certain degree. Line A in the figure is a force Mh in the valve closing direction due to the nozzle jet water flow similar to that shown in FIG. Moreover, in this figure, line B represents the valve opening direction force Fr obtained by the present invention, and the valve opening direction force Fr varies in proportion to the nozzle opening degree. That is, the downward load W of the weight 13
The torque To in the valve opening direction applied from the variable radius arm /q to the variable radius arm lq has a magnitude proportional to the radius of rotation of the variable radius arm lq. For example, variable radius arm/
4 (each contact point p1, p2... with the No. 1 connecting wire 16)
・The rotation radius at +P6 is R1+R2,...+R6
Yes, the above-mentioned valve opening direction torque T.

は、それぞれＷＲｌ　＋ＷＲ２、・・・、ＷＲｌとなる
。ここでＲ１＞Ｒ’、・・・＞Ｒｅとなっているため、
ニードル弁３の全開位置（第４図の状態）で最大弁開方
向トルクＷＲＩが得られるとともに、該弁開方向トルク
Ｔｏはニードル弁３の開放に従って次第に低下していき
、全開位置で最小値ＷＲ，となる。この結果、半径固定
アーム１３を介して得られる弁開方向力Ｆｒは、第５図
線図Ｂで表されるように該半径固定アーム１３の回転半
径Ｒ，で上記弁開方向トルクＴｏを割ったものとなり、
全閉位置で最大線的に低下し、全開位置で最小、ＷＲｌ
となる。are WRl +WR2, . . . , WRl, respectively. Here, R1>R',...>Re, so
The maximum valve opening torque WRI is obtained at the fully open position of the needle valve 3 (the state shown in FIG. 4), and the valve opening torque To gradually decreases as the needle valve 3 opens, and reaches the minimum value WR at the fully open position. , becomes. As a result, the force Fr in the valve opening direction obtained via the fixed radius arm 13 is calculated by dividing the torque To in the valve opening direction by the radius of rotation R of the fixed radius arm 13, as shown in diagram B in Figure 5. It became something that
Maximum linear drop in fully closed position, minimum in fully open position, WRl
becomes.

Ｏ したがって、上記ノズル噴射水流による弁開方向力Ｍｈ
（線図Ａ）と錘り６による弁開方向力Ｆｒ（線図Ｂ）と
を合成すると、線図Ｏのようになり、本合成力０は、上
記両力Ｍｈ　ｒ　Ｆｒの完全均衡線である横軸線にほぼ
沿うように全閉位置から全開位置まで分布する。すなわ
ち、上記両刃Ｍｈ、Ｆｒは常時はぼ釣合った状態を維持
することとなり、このため、ニードル弁３を開ける場合
も閉じる場合も該ニードル弁３を非常に小さな力で操作
させることができ、第Ｓ図中線図りおよびＥで表した弁
閉操作力Ｆを極めて小さな力に設定することができる。O Therefore, the valve opening direction force Mh due to the nozzle jet water flow is
(Diagram A) and the force Fr in the valve opening direction due to the weight 6 (Diagram B) are combined to form a diagram O, and this resultant force 0 is the perfect balance line of the above two forces Mh r Fr. It is distributed from the fully closed position to the fully open position approximately along a certain horizontal axis line. That is, the double-edged blades Mh and Fr always maintain a roughly balanced state, and therefore, the needle valve 3 can be operated with a very small force when opening or closing the needle valve 3. The valve closing operation force F shown by the middle line in FIG. S and E can be set to an extremely small force.

なお、本実施例では半径可変アームの形状を弁開方向力
Ｆｒが直線的に変化するように成形しているが、弁開方
向力Ｍｈに完全に沿って変化させるような形状やその他
任意形状に成形することもやきる。In this embodiment, the shape of the variable radius arm is formed so that the force in the valve opening direction Fr changes linearly, but it may be shaped so that the force in the valve opening direction changes completely along the force Mh, or any other arbitrary shape. It can also be molded into

〔発明の効果〕〔Effect of the invention〕

以上述べたように、本発明によるペルトン水車のニード
ル弁制御装置は、半径可変アームを介して弁開方向荷重
をニードル弁に負荷させ、ノズル噴射水力による弁閉方
向力と上記弁開方向荷重とが常に釣合い状態を維持する
ように、前記半径可変アームのアーム長を弁開方向力が
大きくなる位置にて長く形成し、かつ弁開方向力が小さ
くなる位置にて短く形成するようにしたから、ニードル
弁を常にほぼ無負荷の状態に保つことがｆき、咳ニーＰ
ル弁の操作力を不必要に大きくしなくてすむとともに、
ニードル弁の微調整を容易に行うことができる。したが
って、本発明によれば、ニードル弁を作動するサーボモ
ータおよびその周辺機器を小型化することによって装置
全体の小型化を図ることができるとともに、水車の回転
制御を正確かつ容易に行うことができる。As described above, the needle valve control device for a Pelton water turbine according to the present invention applies a load in the valve opening direction to the needle valve via the variable radius arm, and combines the force in the valve closing direction due to the nozzle injection hydraulic force with the load in the valve opening direction. The arm length of the variable radius arm is made longer at the position where the force in the valve opening direction is large and short at the position where the force in the valve opening direction is small so that the variable radius arm always maintains a balanced state. , the needle valve can always be kept in an almost unloaded state, and the cough knee P
This eliminates the need to unnecessarily increase the operating force of the valve, and
Fine adjustment of the needle valve can be easily performed. Therefore, according to the present invention, by downsizing the servo motor that operates the needle valve and its peripheral equipment, the entire device can be downsized, and the rotation of the water turbine can be accurately and easily controlled. .

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

第１図は従来のペルトン水車のノズル部分を表した縦断
面図、第２図は従来装置におけるノズル開度とニーｙル
弁に作用する力との関係を表した線図、第３図は本発明
の一実施例におけるペルトン水車の第７図相当の縦断面
図、第４図は半径可変形アームの拡大図、第Ｓ図は本発
明に計けるノズル開度とニードル弁作用力との関係線図
である。 ｌ・・・ノズル、：１・・・ノズル噴射水流、３・・・
ニードル弁、ｑ・・・サーボモータｔ’　／ｌ・・・第
１連結ワイヤ、／コ・・・回転軸、１３・・・半径固定
形アーム、　／４（・・・半径可変形アーム、／Ｓ・・
・錘り、／６・・・第２連結ワイヤ。 出願人代理人　猪　股　清 躬１図 躬２繍 躬３目 躬４目 第５目Figure 1 is a longitudinal sectional view showing the nozzle part of a conventional Pelton turbine, Figure 2 is a diagram showing the relationship between the nozzle opening and the force acting on the knee valve in the conventional device, and Figure 3 is A vertical cross-sectional view corresponding to FIG. 7 of a Pelton turbine according to an embodiment of the present invention, FIG. 4 is an enlarged view of a variable radius arm, and FIG. It is a relationship diagram. l... Nozzle, :1... Nozzle jet water flow, 3...
Needle valve, q... Servo motor t' /l... First connection wire, /co... Rotating shaft, 13... Fixed radius arm, /4 (... Variable radius arm, / S...
- Weight, /6... second connection wire. Applicant's agent: Inomata

Claims (1)

【特許請求の範囲】[Claims] ノズル開度調節用のニードル弁に弁開方向荷重をワイヤ
を連結して上記ニーｙル弁に弁閉方向力として作用する
ノズル噴射水力に対抗せしめることにより上記ニードル
弁の開度調整用操作力を低減しうるようにしたペルトン
水車のニードル弁制御装置において；上記弁開方向荷重
とニードル弁とを結ぶ連結ワイヤを回転半径が連続的に
変化するカム板状に形成された半径可変アームにワイヤ
掛けしてなり、上記半径可変アームの回転軸とワイヤ接
点との間に形成されるアーム長は、ノズル噴射水力によ
る弁閉方向力が大きくなる位置にて長く形成され、かつ
ノズル噴射水力による弁閉方向力が小さくなる位置にて
短くなるように形成されていることを特徴とするペルト
ン水車のニードル弁制御装置。The operation force for adjusting the opening of the needle valve is achieved by connecting a wire to the needle valve for adjusting the opening of the nozzle and applying a load in the valve opening direction to counteract the nozzle injection hydraulic force acting on the needle valve as a force in the valve closing direction. In a needle valve control device for a Pelton water turbine that is capable of reducing The length of the arm formed between the rotation axis of the variable radius arm and the wire contact point is longer at the position where the force in the valve closing direction due to the hydraulic force of the nozzle injection is large, and the arm length is formed between the rotation axis of the variable radius arm and the wire contact point. A needle valve control device for a Pelton water turbine, characterized in that the needle valve control device is formed to be short at a position where the force in the closing direction is small.
JP59044750A 1984-03-08 1984-03-08 Needle valve control device for pelton water turbine Pending JPS60187775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59044750A JPS60187775A (en) 1984-03-08 1984-03-08 Needle valve control device for pelton water turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59044750A JPS60187775A (en) 1984-03-08 1984-03-08 Needle valve control device for pelton water turbine

Publications (1)

Publication Number Publication Date
JPS60187775A true JPS60187775A (en) 1985-09-25

Family

ID=12700119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59044750A Pending JPS60187775A (en) 1984-03-08 1984-03-08 Needle valve control device for pelton water turbine

Country Status (1)

Country Link
JP (1) JPS60187775A (en)

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