JPS60128976A - Casing of hydraulic machine - Google Patents

Casing of hydraulic machine

Info

Publication number
JPS60128976A
JPS60128976A JP58235056A JP23505683A JPS60128976A JP S60128976 A JPS60128976 A JP S60128976A JP 58235056 A JP58235056 A JP 58235056A JP 23505683 A JP23505683 A JP 23505683A JP S60128976 A JPS60128976 A JP S60128976A
Authority
JP
Japan
Prior art keywords
casing
casing drum
outer diameter
drum
stay
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
JP58235056A
Other languages
Japanese (ja)
Inventor
Takaomi Morii
森井　啓臣
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 JP58235056A priority Critical patent/JPS60128976A/en
Publication of JPS60128976A publication Critical patent/JPS60128976A/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
    • 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
    • F03B11/02—Casings
    • 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 reduce frictional loss in casing drum thus to improve the hydraulic performance by reducing the outer diameter of annular plate corresponding with start to end sections of casing drum and the size of stay vane gradually. CONSTITUTION:When operating a hydraulic mechanism as water turbine, water will flow through casing drum 1, between stay vane 3, between guide vane 4 and through runner 5 in this order. Upon reduction of the outer diameter of annular plate 2, the effective flow path area A of casing drum will increase by such amount B as corresponding with the reduction of outer diameter. For reduction of the outer diameter of annular plate 2 by 10% of the diameter D of casing drum 1, for example, the effective flow path area A of casing drum will increase approximately 3%. Here, the speed head proportional to the square of flow speed will reduce by 6%. Since the frictional loss and the speed head are proportional, the frictional loss in casing drum 1 will reduce approximately 6%.

Description

【発明の詳細な説明】 ［発明の技術分野］ 本発明は、水車、ポンプ又はポンプ水車等の水力機械の
ケーシングの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to improvements in casings for hydraulic machines such as water turbines, pumps or pump water turbines.

［発明の技術的背景とその問題点コ 従来の水力機械のケーシングについて第１図を参照して
説明する。　Ｍ　１図は水力機械の断面な示す断面図で
ある。第１図中５は主軸に直結されたランチであり、こ
のランナ１の外周部には複数のガイドベーン４が放射状
ζニ装置されている。またこのガイドベーン４の外周部
には放射状に複数のステーベーン３が配置され、さらに
このステーベーン３の上下端には一対の環状平板２が固
着されている。この環状平板２の反ステーベーン側には
ケーシング巻胴１の開口端が夫々固着されている。[Technical background of the invention and its problems] The casing of a conventional hydraulic machine will be explained with reference to FIG. Figure M1 is a cross-sectional view of a hydraulic machine. Reference numeral 5 in FIG. 1 is a launch directly connected to the main shaft, and a plurality of guide vanes 4 are arranged radially around the outer periphery of the runner 1. A plurality of stay vanes 3 are arranged radially around the outer circumference of the guide vane 4, and a pair of annular flat plates 2 are fixed to the upper and lower ends of the stay vanes 3. The open ends of the casing winding drums 1 are fixed to the side of the annular flat plate 2 opposite to the stay vanes.

このような構造の水力機械において、従来はケーシング
巻胴１の巻き始め部及び巻き終り部に対応する環状主板
２の内径及び外径が同一であるとともに、各ステ−ベー
ンの長さ及び厚さが同一であった。そのためケージレグ
巻胴１内にステーベーン２がかなり突出し、そのためク
ーシング巻胴内の流路を大きく阻害し、水力性能の低下
を引き起こす要因となっていた。In a hydraulic machine having such a structure, conventionally, the inner diameter and outer diameter of the annular main plate 2 corresponding to the winding start and end of the casing drum 1 are the same, and the length and thickness of each stay vane are the same. were the same. As a result, the stay vanes 2 protrude considerably into the cage leg winding drum 1, which greatly obstructs the flow path within the Cushing winding drum, causing a decline in hydraulic performance.

［発明の目的］ 本発明は、効率を向上させた水力機械のケーシングを提
供することを目的と５する。[Object of the Invention] It is an object of the present invention to provide a casing for a hydraulic machine with improved efficiency.

［発明の概喪コ 上記の目的を達成するため本発明は、ランナの外周部に
放射状に配置された複数のステーベーンとこのステーベ
ーンの上下端にそれぞれ固着された一対の環状平板とこ
の環状平板の反ステーベーン側にその開口端が固着され
たケーシング巻胴とを有する水力機械のケーシングにお
いて、ケーシング巻胴の巻き始め部より巻き終わり部：
二対芯する前記環状平板の外径及び前記ステーベーンの
大きさを順次減少させることにより、ケーシング巻胴内
の摩擦損失及びステーベーンの衝突損失等の流体摩擦損
失を低減し、水力性能を向上させたことを特徴としてい
る０ ［発明の実施例］ 次に本発明の一実施例について第１図及び＄２図を参照
して説明する。主はケーシング巻胴であり、このケーシ
ング巻胴の巻き始め部より巻き終り部に対応する環状平
板２の外径を曲線により順次減少させている。さらにス
テーベーン３につＩ、ｚても同様にその長さ及び厚さを
順次減少させてＶ）る−Ｐ 次に作用を説明する。水力機械のケーシングにおいては
、水力機械を水車として使用する場合。[Summary of the Invention] To achieve the above object, the present invention provides a plurality of stay vanes arranged radially around the outer periphery of a runner, a pair of annular flat plates fixed respectively to the upper and lower ends of the stay vanes, and a pair of annular flat plates fixed to the upper and lower ends of the stay vanes. In a hydraulic machine casing having a casing drum whose open end is fixed to the side opposite to the stay vane, the winding start part to the winding end part of the casing drum:
By sequentially decreasing the outer diameter of the two pairs of annular flat plates and the size of the stay vane, fluid friction losses such as friction loss in the casing drum and collision loss of the stay vanes are reduced, and hydraulic performance is improved. [Embodiment of the Invention] Next, an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2. The main body is a casing winding drum, and the outer diameter of the annular flat plate 2 corresponding to the winding start part to the winding end part of this casing winding drum is gradually decreased along a curve. Furthermore, the length and thickness of the stay vanes 3 are sequentially reduced in the same manner.V)-P Next, the operation will be explained. In the casing of a hydraulic machine, when the hydraulic machine is used as a water wheel.

水はケーシング巻胴１内、ステーペー７３の間。The water is inside the casing drum 1 and between the stays 73.

ガイドベージ４の間、ランナ５内の順に流れる。It flows between the guide pages 4 and within the runners 5 in this order.

この場合の水力性能（水力効率）について以下考察する
。即ち環状平板２の外径が小さくなると第１図に示すよ
うに、ケーシング巻胴有効流路面積Ａが外径の少さくな
った分に対応する流路面積Ｂ分だけ増加する。例えば環
状主板の外径をケージ小 ング巻胴１の直径りの１０％分たけ歩さくすると、ケー
シング巻胴有効流路面積Ａは約３チ増加する。The hydraulic performance (hydraulic efficiency) in this case will be discussed below. That is, when the outer diameter of the annular flat plate 2 becomes smaller, as shown in FIG. 1, the effective flow passage area A of the casing drum increases by the flow passage area B corresponding to the decrease in the outer diameter. For example, if the outer diameter of the annular main plate is increased by 10% of the diameter of the cage small winding drum 1, the effective flow passage area A of the casing winding drum increases by about 3 cm.

このとき速度水頭は流速の２乗に比例するため約６チ小
さくなる。摩擦損失と速波水頭は比例するから、結果と
してこの場合ケーシング巻胴１内の摩擦損失は約６％減
少する。At this time, the velocity head is proportional to the square of the flow velocity, so it becomes smaller by about 6 inches. Since the friction loss and the fast wave head are proportional, as a result, the friction loss in the casing drum 1 is reduced by about 6% in this case.

またステーベーン３の入口部では、ケーシング巻胴１内
の速度水頭が小さくなっているため、更にステ−ベーン
３自体の厚さが少さくなっているため、衝突損失が減少
する。Furthermore, at the inlet portion of the stay vane 3, the velocity head within the casing drum 1 is reduced, and the thickness of the stay vane 3 itself is also reduced, resulting in a reduction in collision loss.

次に第３図及び第４図を参照して本発明の他の実施例に
ついて説明する。第３図；二示す実施例では環状平板２
の外径を直線により順次減少させている。また第４図に
示す実施例では、環状平板２の外径を直線及び円弧の組
み合せにより順次減少させている。Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3; In the second embodiment shown, the annular flat plate 2
The outer diameter of the outer diameter is gradually decreased in a straight line. Further, in the embodiment shown in FIG. 4, the outer diameter of the annular flat plate 2 is gradually reduced by a combination of straight lines and circular arcs.

これらの実施例においては、直線又は直線及び円弧の組
み合せにより環状平板２の外径を減少させているので、
環状平板２の機械加工及び組み立て尋がより平易となる
。In these embodiments, the outer diameter of the annular flat plate 2 is reduced by a straight line or a combination of a straight line and a circular arc.
Machining and assembly of the annular flat plate 2 become easier.

［発明の効果］ 以上説明したように、本発明によれば、ケーシング巻胴
内の鳴動流路面積を増加させること：二よリケーシング
巻胴内の摩擦損失を減少させ、さらにステーベーンの大
きさを減少させること（二よりステーベーン入口部の衝
突損失を減少させたので、水力性能の向上させた水力機
械のケーシングを提供できる。[Effects of the Invention] As explained above, according to the present invention, it is possible to increase the area of the rumble flow path in the casing drum, reduce the friction loss in the casing drum, and further reduce the size of the stay vane. (2) Since the collision loss at the stay vane inlet is reduced, it is possible to provide a casing for a hydraulic machine with improved hydraulic performance.

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

第１図は水力機械のケーシングを示す断面図、第２図は
本発明の水力機械のケーシングの一実施例を示す第１図
のｎ−ｎ線における断面図、第３図及び第４図は夫々本
発明の他の実施例を示す第１図の■−■線における断面
図である。 １・・・ケーシング巻胴　２・・・環状平板３・・・ス
テーベーン “代理人　弁理士　則　近　憲　佑（ほか１名）第１図 召 第２図 第４図FIG. 1 is a sectional view showing a casing of a hydraulic machine, FIG. 2 is a sectional view taken along line nn of FIG. 2A and 2B are sectional views taken along the line ■-■ in FIG. 1, respectively showing other embodiments of the present invention. 1...Casing winding drum 2...Annular flat plate 3...Stay vane "Representative Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 4

Claims (1)

【特許請求の範囲】[Claims] ランチの外周部に放射状に配置された複数のステーベー
ンとこのステーベーンの上下端にそれぞれ固着された一
対の環状平板とこの環状平板の反ステーベーン側にその
開口端が固着されたケーシング巻胴とを有する水力機械
のケーシングにおいて、ケーシング巻胴の巻き初め部よ
り巻き終り部に対応する前記環状平板の外径及び前記ス
テーベーンの大きさを順次減少させたことを特徴とする
水力機械のケーシング。It has a plurality of stay vanes arranged radially around the outer periphery of the launch, a pair of annular flat plates fixed to the upper and lower ends of the stay vanes, respectively, and a casing winding drum having an open end fixed to the side opposite to the stay vanes of the annular flat plates. A casing for a hydraulic machine, characterized in that the outer diameter of the annular flat plate and the size of the stay vane corresponding to a winding end portion of a casing drum are sequentially decreased from a winding start portion to a winding end portion.
JP58235056A 1983-12-15 1983-12-15 Casing of hydraulic machine Pending JPS60128976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58235056A JPS60128976A (en) 1983-12-15 1983-12-15 Casing of hydraulic machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58235056A JPS60128976A (en) 1983-12-15 1983-12-15 Casing of hydraulic machine

Publications (1)

Publication Number Publication Date
JPS60128976A true JPS60128976A (en) 1985-07-10

Family

ID=16980427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58235056A Pending JPS60128976A (en) 1983-12-15 1983-12-15 Casing of hydraulic machine

Country Status (1)

Country Link
JP (1) JPS60128976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005226645A (en) * 2004-02-10 2005-08-25 Robert Bosch Gmbh Angle adjusting device for crank shaft and its method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005226645A (en) * 2004-02-10 2005-08-25 Robert Bosch Gmbh Angle adjusting device for crank shaft and its method

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