JP3857465B2 - Vane sealing device - Google Patents

Vane sealing device Download PDF

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Publication number
JP3857465B2
JP3857465B2 JP16682099A JP16682099A JP3857465B2 JP 3857465 B2 JP3857465 B2 JP 3857465B2 JP 16682099 A JP16682099 A JP 16682099A JP 16682099 A JP16682099 A JP 16682099A JP 3857465 B2 JP3857465 B2 JP 3857465B2
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JP
Japan
Prior art keywords
vane
seal rubber
sealing device
holding member
tightening bolt
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JP16682099A
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Japanese (ja)
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JP2000356178A (en
Inventor
伸広 貝沼
寿一郎 河井
正博 吉田
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Hitachi Ltd
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Hitachi Ltd
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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
    • 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

Description

【０００１】
【発明の属する技術分野】
本発明はベーンのシール装置に係わり、特に水車のガイドベーンのように揺動自在に形成されているベーンの端面とベーンの端面に対向している固定壁との間にシールゴムが縮圧状に介在されるベーンのシール装置に関するものである。
【０００２】
【従来の技術】
従来一般に採用されているこの種のシール装置，例えば水車などに用いられるガイドベーンのシール装置は、図２および図３に示されているように、隣接するガイドベーン１、２のステム７、８間で、かつガイドベーン１、２の全閉位置のガイドベーン上下端面に対向する位置の固定側壁面，すなわち上カバー（ボトムリング）６に、シールゴム押え５により取付けられたシールゴム３を設け、そしてこのシールゴム３とガイドベーンの端面とを接触させることにより水のシールを行うようにしている。
【０００３】
この場合、シールゴム３の保持構成は、図にも示されているように、シールゴム３の裏面には補強板４が固着され、この補強されたシールゴム３をシールゴム押え５を介して上カバー（ボトムリング）６に取付け、ガイドベーン１、２の全閉時にシールゴム３をガイドベーン１の頭部下端面およびガイドベーン２の尾部上端面に縮圧状に接触させ、鉄管（水路）側よりランナ室への漏水を防止するように構成されている。シールゴム３は、シールゴム３とガイドベーン１の端面とが縮圧状に接触，すなわちガイドベーンのギャップからの漏水防止の効果を増大させるために、適宜の締代（シールゴム３は間隙ｇより大きな突出高さを有する）が設けられている。
【０００４】
なお、この種ガイドベーンにおけるシール装置に関連するものとしては、例えば特開昭５０−１５４６４０号公報が挙げられる。
【０００５】
【発明が解決しようとする課題】
このように形成されているガイドベーンのシール装置であると、前述したようにシールゴム３には、漏水防止の効果を増大させるため締代が設けられていることから、ガイドベーン１、２の全閉位置付近では、ガイドベーンとシールゴムとの摺動によりシールゴムが片寄り、シールゴム３とシールゴム押え５の間に間隙が生じる。このため、ガイドベーン開閉動作によるシールゴム３の摩擦力の増大によりシールゴム３と補強板４との間に亀裂が生じ、かつ高圧高速の漏水によりシールゴム３の損傷部分に力が作用してシールゴムが流失される恐れがある。
【０００６】
また、ガイドベーン２とボトムリング６との間隙，すなわちサイドギャップｇを通じて微量の漏水量が補強板４部に浸透し、間隙部に腐食が生じ、これによっても、前述同様にシールゴム３に浮き上がりが生じ、損傷や流失が生じる恐れがある。
【０００７】
さらにまた、図からもわかるように腐食性の強い流体のシールの場合、間隙ａ部全周およびｂ部より流体が侵入し、シールゴム補強板４およびシールゴム押え５の座面を間隙腐食により壊食し、座面ｃ面にギャップを発生させることにより、締付ボルト９の締付力を減少させ、シール装置の部品を流失に至らしめる可能性がある。
【０００８】
また、ａ、ｂ面より流体が締付ボルト９のネジ部ｄに侵入しネジ部を間隙腐食により壊食し締付ボルト９のネジ山の減少が発生し、締付力低下、さらに脱落に至らしめる可能性がある。すなわちガイドベーン端面シール装置における個所から間隙腐食により破損が促進され、シール効力が著しく低下してしまう恐れがあるということである。
【０００９】
本発明はこれに鑑みなされたもので、その目的とするところは、構成簡単かつ組立ておよび分解容易にして、ベーンの開閉および高圧流水に対して耐損傷，耐腐食性に優れた寿命の長いベーンのシール装置を提供することにある。
【００１０】
【課題を解決するための手段】
すなわち本発明は、揺動自在に形成されているベーンの端面とこのベーンの端面に対向している固定壁との間に縮圧状に介在され、かつ前記固定壁側に固定保持されたシールゴムを備えたベーンのシール装置において、前記固定壁面に凹部を設けるとともに、この凹部に、前記シールゴムを溝内に埋設状態に保持した保持部材を嵌め込み、かつこの保持部材を締付ボルトにて固定するとともに、前記締付ボルト頭部の周囲に、この締付ボルトの孔を介しての漏洩を阻止する封止材を施し、かつ前記保持部材の外周壁面と前記凹部壁面との間の全周に、シール材を施すようにし所期の目的を達成するようにしたものである。
【００１１】
またこの場合、前記保持部材のシールゴム保持用の溝を、奥部側が幅広の略台形状に形成し、かつ前記シールゴムを、前記溝に圧入後加硫成形するようにしたものである。また、前記保持部材の締付ボルト孔に、締付ボルトの頭部が沈みこむ座繰り孔を設けるとともに、この座繰り孔全面に前記封止材を施し、かつ保持部材の外周側壁部に周方向にのびた周溝を設けるとともに、この周溝に前記シール材を嵌め込み支持させるようにしたものである。また、前記シールゴムをニトリルブチレンゴムで形成するようにしたものである。
【００１２】
すなわちこのように形成されたベーンのシール装置であると、シールゴムを溝内に埋設状態に保持した保持部材が固定壁面に設けられた凹部に嵌め込まれ、すなわち保持部材と一体にシールゴムが保持されることから、ベーンとシールゴムの摺動に際しても、溝とゴムシールとの間に間隙が生じにくく、漏水浸透に伴うシールゴムの浮き上がりによるシールゴムの剥離流失を防止することができ、またこの保持部材固定保持する締付ボルトの頭部および保持部材の外周壁面と前記凹部壁面との間の全周にはシール材が施こされているので、ボルト頭部や保持部材の側壁より締付ボルトのネジ嵌合部への流体浸食を防止することができ、したがって、ベーンの開閉および高圧流水に対して耐損傷および耐腐食性に優れたものとなる。またさらに、シールゴムが保持部材に一体的に保持されているので、その組立てや分解は非常に簡単なものとなるのである。
【００１３】
【発明の実施の形態】
以下図示した実施例に基づいて本発明を詳細に説明する。図１にはベーンの一例であるガイドベーンの場合のシール装置が断面で示されている。１および２がガイドベーンであり、６が上カバー（固定壁，ボトムリング）、３がシールゴム、ｇがガイドベーン２と上カバー６とのギャップ部である。
【００１４】
上カバー６の部分，すなわちガイドベーン１、２の全閉状態における端面に対向している部分に、凹部２０が設けられ、この凹部２０には、シールゴム押え板（保持部材）１２が嵌め込まれる。このシールゴム押え板１２には、シールゴムを保持するための溝２１が設けられる。この溝２１は、奥部側が幅広の略台形状をなし、かつシールゴム押え板１２の長手方向に沿って形成される。この溝２１の内部にはシールゴム３が配置される。
【００１５】
また、シールゴム押え板１２には、シールゴム押え板を固定保持するための締付ボルト孔２３が設けられ、さらにこの締付ボルト孔２３には締付ボルトの頭部が沈みこむ座繰り孔２４が設けられている。
【００１６】
シールゴム押え板１２は、凹部２０に嵌め込まれ締付ボルト９により固定されるわけであるが、この締付ボルトの頭部には、締付ボルトの孔を介しての漏洩を阻止する封止材１１が施されている。すなわち、ボルト頭部よりゴムシール押え座面および締付ボルト９のネジ嵌合部への流体浸食を防止するため、封水を目的とした封水材を、締付ボルト９の締付後に充填するようにしている。また、シールゴム押え板１２の外周壁面と前記凹部２０壁面との間の全周に、封水パッキング（シール材）１０が施される。封水パッキング１０は、シール押え板１２側に加工した溝２２に装着される。
【００１７】
これによりランナ室への流入した高圧高速の漏水により上カバー（ボトムリング）６にキャビテーション損傷が発生するという欠点、および漏水浸透に伴うシールゴム３の浮き上がりおよび高圧高速の漏水によるシールゴム３の流失という欠点を補うことができる。すなわち、腐食性の強い流体に対し、シールゴム押え座面ｃおよび締付ボルト９のネジ嵌合部ｄは、シールゴム押え１２の外周に設置した封水パッキング１０および締付ボルト９頭部に充填する封水材１１により、間隙腐食が防止されるのである。
【００１８】
本装置に於けるシールゴム３としては、種々考えられるが、実験の結果ではニトリルブチレンゴムを用いるのが最も良いようである。またこのシールゴム３は、特に次のようにして形成することにより、さらに堅牢なものとすることができる。すなわち、シールゴム押え１２内に設けられている略台形溝２１内に高圧によりゴムを注入後、ゴムの性質を確保するための加流を行い整形することにより、シールゴム押え５に加工した略台形の溝と間隙が生じないため剥離流失をさらに防止することが可能となる。
【００１９】
以上説明してきたようにこのように形成されたガイドベーンのシール装置であると、シールゴム押え５と一体にシールゴム３が保持されることから、ベーンとシールゴムの摺動に際しても、溝２１とシールゴム３との間に間隙が生じにくく、漏水浸透に伴うシールゴムの浮き上がりによるシールゴムの剥離流失を防止することができ、またこのシールゴム押え１２を固定保持する締付ボルトの頭部およびシールゴム押え１２の外周壁面と前記凹部壁面２０との間の全周にはシール材１０が施こされているので、ボルト頭部やシールゴム押えの側壁より締付ボルトのネジ嵌合部への流体浸食を防止することができ、腐食性の強い流体内でも、シールゴム押え１２の座面およびこれを締付るボルト９のネジ面の腐食を防止可能となる。したがって、ベーンの開閉および高圧流水に対して耐損傷および耐腐食性に優れたものとなる。またさらに、シールゴム３がシールゴム押え５に一体的に保持されているので、その組立てや分解は非常に簡単なものとなるのである。
【００２０】
【発明の効果】
以上説明してきたように本発明によれば、構成簡単かつ組立てや分解容易にして、ベーンの開閉および高圧流水に対して耐損傷および耐腐食性に優れた寿命の長いベーンのシール装置を得ることができる。
【図面の簡単な説明】
【図１】本発明のベーン（ガイドベーン）のシール装置の一実施例を示す平面図および縦断側面図である。
【図２】従来のベーン（ガイドベーン）のシール装置の一実施例を示す平面図である。
【図３】図２のＢ−Ｂ線に沿う断面図である。
【符号の説明】
１，２…ガイドベーン（ベーン）、３…シールゴム、４…シールゴム補強板、５…シールゴム押え、６…上カバー（固定壁，ボトムリング）、７，８…ガイドベーンステム、９…締付ボルト、１０…封水パッキング、１１…封水材、１２…シールゴム押え板（保持部材）、ａ…間隙部、ｂ…間隙部、ｃ…座面、ｄ…ネジ嵌合部、ｇ…ガイドベーンギャップ部、２０…凹部、２１…溝、２２…周溝。[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane sealing device, and in particular, a seal rubber is compressed between a vane end surface formed swingably like a guide vane of a water turbine and a fixed wall facing the vane end surface. The present invention relates to an intervening vane sealing device.
[0002]
[Prior art]
As shown in FIGS. 2 and 3, this kind of sealing device generally used in the prior art, for example, a guide vane sealing device used in a water turbine or the like, has stems 7 and 8 of adjacent guide vanes 1 and 2, respectively. A seal rubber 3 attached by a seal rubber presser 5 is provided on a fixed side wall surface, that is, an upper cover (bottom ring) 6 at a position facing the upper and lower end surfaces of the guide vanes in the fully closed position of the guide vanes 1 and 2; Water is sealed by bringing the seal rubber 3 and the end face of the guide vane into contact with each other.
[0003]
In this case, as shown in the drawing, the holding structure of the seal rubber 3 is fixed to the back surface of the seal rubber 3, and a reinforcing plate 4 is fixed to the upper cover (bottom bottom) via the seal rubber presser 5. Ring) 6 is attached, and seal rubber 3 is brought into contact with the lower end of the head of guide vane 1 and the upper end of the tail of guide vane 2 in a compressed state when guide vanes 1 and 2 are fully closed, and the runner chamber from the iron pipe (water channel) side It is configured to prevent water leakage. In order to increase the effect of preventing leakage of water from the gap of the guide vane, the seal rubber 3 has a proper tightening margin (the seal rubber 3 protrudes larger than the gap g). Having a height).
[0004]
In addition, as a thing relevant to the sealing device in this kind of guide vane, Unexamined-Japanese-Patent No. 50-154640 is mentioned, for example.
[0005]
[Problems to be solved by the invention]
In the guide vane sealing device formed in this way, as described above, the seal rubber 3 is provided with a tightening margin to increase the effect of preventing water leakage. In the vicinity of the closed position, the seal rubber is displaced by sliding between the guide vane and the seal rubber, and a gap is generated between the seal rubber 3 and the seal rubber presser 5. For this reason, a crack occurs between the seal rubber 3 and the reinforcing plate 4 due to an increase in the frictional force of the seal rubber 3 due to the opening and closing operation of the guide vanes, and a force acts on the damaged portion of the seal rubber 3 due to high-pressure and high-speed water leakage. There is a fear.
[0006]
Further, a minute amount of water leaks into the reinforcing plate 4 through the gap between the guide vane 2 and the bottom ring 6, that is, the side gap g, and corrosion occurs in the gap, and this also causes the seal rubber 3 to lift up as described above. Damage and runoff may occur.
[0007]
Furthermore, as can be seen from the figure, in the case of a highly corrosive fluid seal, the fluid enters from the entire circumference of the gap a and b, and the seating surfaces of the seal rubber reinforcing plate 4 and the seal rubber presser 5 are eroded by gap corrosion. By generating a gap in the seating surface c, there is a possibility that the tightening force of the tightening bolt 9 is reduced and parts of the seal device are lost.
[0008]
In addition, fluid enters the screw part d of the tightening bolt 9 from the surfaces a and b, and the screw part is eroded by crevice corrosion, resulting in a decrease in the thread of the tightening bolt 9, leading to a reduction in the tightening force and further dropping. There is a possibility that That is, breakage is accelerated by crevice corrosion from a point in the guide vane end face sealing device, and the sealing effect may be significantly reduced.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of this, and the object of the present invention is to provide a long-life vane that has a simple structure, is easy to assemble and disassemble, and is excellent in damage resistance and corrosion resistance against opening and closing of a vane and high-pressure flowing water. It is in providing a sealing device.
[0010]
[Means for Solving the Problems]
That is, the present invention relates to a seal rubber which is interposed in a compressed state between an end face of a vane formed so as to be swingable and a fixed wall facing the end face of the vane, and is fixedly held on the fixed wall side. In this vane sealing device, a concave portion is provided in the fixed wall surface, and a holding member holding the seal rubber embedded in the groove is fitted into the concave portion, and the holding member is fixed with a tightening bolt. In addition, a sealing material for preventing leakage through the hole of the tightening bolt is provided around the head of the tightening bolt, and on the entire periphery between the outer peripheral wall surface of the holding member and the concave wall surface. In order to achieve the intended purpose, a sealing material is applied.
[0011]
Further, in this case, the groove for holding the seal rubber of the holding member is formed in a substantially trapezoidal shape having a wide back side, and the seal rubber is vulcanized after being press-fitted into the groove. In addition, a counterbore hole in which the head of the tightening bolt sinks is provided in the tightening bolt hole of the holding member, the sealing material is applied to the entire surface of the counterbore hole, and the outer peripheral side wall portion of the holding member is peripherally provided. A circumferential groove extending in the direction is provided, and the sealing material is fitted and supported in the circumferential groove. Further, the seal rubber is made of nitrile butylene rubber.
[0012]
In other words, in the vane sealing device formed in this way, the holding member holding the seal rubber embedded in the groove is fitted into the recess provided on the fixed wall surface, that is, the seal rubber is held integrally with the holding member. Therefore, even when the vane and the seal rubber slide, it is difficult for a gap to be formed between the groove and the rubber seal, and it is possible to prevent the seal rubber from peeling off due to the seal rubber rising due to water penetration, and to hold the holding member fixedly. Since the sealing material is applied to the entire circumference between the head of the tightening bolt and the outer peripheral wall surface of the holding member and the wall surface of the recess, the screw fitting of the tightening bolt from the bolt head or the side wall of the holding member Therefore, it is possible to prevent fluid erosion to the portion, and therefore excellent in damage resistance and corrosion resistance against opening / closing of the vane and high-pressure flowing water. Furthermore, since the seal rubber is integrally held by the holding member, its assembly and disassembly are very simple.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiments. FIG. 1 shows a cross section of a sealing device in the case of a guide vane which is an example of a vane. 1 and 2 are guide vanes, 6 is an upper cover (fixed wall, bottom ring), 3 is a seal rubber, and g is a gap between the guide vane 2 and the upper cover 6.
[0014]
A concave portion 20 is provided in a portion of the upper cover 6, that is, a portion facing the end face of the guide vanes 1 and 2 in the fully closed state, and a seal rubber pressing plate (holding member) 12 is fitted into the concave portion 20. The seal rubber pressing plate 12 is provided with a groove 21 for holding the seal rubber. The groove 21 has a substantially trapezoidal shape with the back side being wide and is formed along the longitudinal direction of the seal rubber pressing plate 12. The seal rubber 3 is disposed inside the groove 21.
[0015]
The seal rubber retainer plate 12 is provided with a tightening bolt hole 23 for fixing and holding the seal rubber retainer plate. Further, the tightening bolt hole 23 has a countersink hole 24 into which the head of the tightening bolt sinks. Is provided.
[0016]
The seal rubber presser plate 12 is fitted in the recess 20 and fixed by the tightening bolt 9. A sealing material for preventing leakage through the hole of the tightening bolt is provided at the head of the tightening bolt. 11 is given. That is, in order to prevent fluid erosion from the bolt head to the rubber seal presser seat surface and the screw fitting portion of the tightening bolt 9, a sealing material for sealing water is filled after the tightening bolt 9 is tightened. I am doing so. Further, a seal packing (seal material) 10 is applied to the entire circumference between the outer peripheral wall surface of the seal rubber pressing plate 12 and the wall surface of the recess 20. The sealing water packing 10 is attached to the groove 22 processed on the seal pressing plate 12 side.
[0017]
As a result, cavitation damage is generated in the upper cover (bottom ring) 6 due to high-pressure and high-speed water leaking into the runner chamber, and the seal rubber 3 is lifted due to water leakage and the seal rubber 3 is washed away due to high-pressure and high-speed water leakage. Can be supplemented. That is, the seal rubber presser seat surface c and the screw fitting portion d of the tightening bolt 9 are filled in the seal packing 10 and the head of the tightening bolt 9 installed on the outer periphery of the seal rubber presser 12 against a highly corrosive fluid. The sealant 11 prevents crevice corrosion.
[0018]
Various seal rubbers 3 are conceivable in this apparatus, but it seems that it is best to use nitrile butylene rubber in the experimental results. The seal rubber 3 can be made more robust by forming it as follows. That is, after injecting rubber with a high pressure into a substantially trapezoidal groove 21 provided in the seal rubber presser 12, the seal rubber presser 5 is shaped by applying a flow to ensure the properties of the rubber, thereby forming a substantially trapezoidal shape. Since no grooves and gaps are formed, it is possible to further prevent separation flow.
[0019]
As described above, in the guide vane sealing device formed as described above, since the seal rubber 3 is held integrally with the seal rubber presser 5, the groove 21 and the seal rubber 3 are also moved when the vane and the seal rubber slide. It is difficult to generate a gap between the seal rubber and the seal rubber, and the seal rubber can be prevented from peeling off due to the rising of the seal rubber due to water leakage. Further, the head of the tightening bolt for fixing and holding the seal rubber presser 12 and the outer peripheral wall surface of the seal rubber presser 12 Since the sealing material 10 is applied to the entire circumference between the wall surface 20 and the concave wall surface 20, it is possible to prevent fluid erosion from the bolt head or the side wall of the seal rubber presser to the screw fitting portion of the tightening bolt. Even in a highly corrosive fluid, it is possible to prevent corrosion of the seating surface of the seal rubber retainer 12 and the threaded surface of the bolt 9 for tightening it. Therefore, it is excellent in damage resistance and corrosion resistance against opening and closing of the vanes and high-pressure flowing water. Furthermore, since the seal rubber 3 is integrally held by the seal rubber presser 5, the assembly and disassembly thereof is very simple.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a long-life vane sealing device that is simple in construction, easy to assemble and disassemble, and is excellent in damage resistance and corrosion resistance against opening and closing of a vane and high-pressure flowing water. Can do.
[Brief description of the drawings]
FIG. 1 is a plan view and a longitudinal side view showing an embodiment of a sealing device for a vane (guide vane) of the present invention.
FIG. 2 is a plan view showing an embodiment of a conventional vane (guide vane) sealing device.
3 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 ... Guide vane (vane), 3 ... Seal rubber, 4 ... Seal rubber reinforcement board, 5 ... Seal rubber retainer, 6 ... Upper cover (fixed wall, bottom ring), 7, 8 ... Guide vane stem, 9 ... Clamping bolt DESCRIPTION OF SYMBOLS 10 ... Sealing water packing, 11 ... Sealing material, 12 ... Sealing rubber pressing board (holding member), a ... Gap part, b ... Gap part, c ... Seat surface, d ... Screw fitting part, g ... Guide vane gap Part, 20 ... concave part, 21 ... groove, 22 ... circumferential groove.

Claims (5)

揺動自在に形成されているベーンの端面と該ベーンの端面に対向している固定壁との間に縮圧状に介在され、かつ前記固定壁側に固定保持されたシールゴムを備えたベーンのシール装置において、
前記固定壁面に凹部を設けるとともに、該凹部に、前記シールゴムを溝内に埋設状態に保持した保持部材を嵌め込み、かつ該保持部材を締付ボルトにて固定するとともに、前記締付ボルト頭部の周囲に、該締付ボルトの孔を介しての漏洩を阻止する封止材を施し、かつ前記保持部材の外周壁面と前記凹部壁面との間の全周に、シール材を施すようにしたことを特徴とするベーンのシール装置。A vane having a seal rubber interposed in a compressed state between an end face of a vane formed so as to be swingable and a fixed wall facing the end face of the vane and fixedly held on the fixed wall side. In the sealing device,
A concave portion is provided on the fixed wall surface, a holding member holding the seal rubber embedded in the groove is fitted into the concave portion, and the holding member is fixed with a tightening bolt. A sealing material that prevents leakage through the hole of the tightening bolt is applied to the periphery, and a sealing material is applied to the entire circumference between the outer peripheral wall surface of the holding member and the concave wall surface. Vane sealing device characterized by. 前記保持部材のシールゴム保持用の溝は、奥部側が幅広の略台形状に形成され、かつ前記シールゴムは、この溝に圧入後加硫成形されたものである請求項１記載のベーンのシール装置。2. The vane sealing device according to claim 1, wherein the groove for holding the seal rubber of the holding member is formed in a substantially trapezoidal shape having a wide back side, and the seal rubber is vulcanized after being press-fitted into the groove. . 前記保持部材の締付ボルト孔に、締付ボルトの頭部が沈みこむ座繰り孔が設けられるとともに、この座繰り孔全面に前記封止材が施され、かつ保持部材の外周側壁部に周方向にのびた周溝が設けられるとともに、この周溝に前記シール材が嵌め込み支持されてなる請求項１または２記載のベーンのシール装置。The retaining bolt hole of the holding member is provided with a countersink hole in which the head of the tightening bolt sinks, the sealing material is applied to the entire surface of the countersink hole, and the outer peripheral side wall portion of the holding member is 3. The vane sealing device according to claim 1, wherein a circumferential groove extending in a direction is provided, and the sealing material is fitted and supported in the circumferential groove. 前記シールゴムがニトリルブチレンゴムである請求項１，２または３記載のベーンのシール装置。4. The vane sealing device according to claim 1, wherein the seal rubber is nitrile butylene rubber. 前記ベーンが水車若しくはポンプ水車のガイドベーンである請求項１〜４いずれかの項に記載のベーンのシール装置。The vane sealing device according to any one of claims 1 to 4, wherein the vane is a guide vane of a water turbine or a pump turbine.
JP16682099A 1999-06-14 1999-06-14 Vane sealing device Expired - Fee Related JP3857465B2 (en)

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JP16682099A JP3857465B2 (en) 1999-06-14 1999-06-14 Vane sealing device

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Publication number Priority date Publication date Assignee Title
CN105604768B (en) * 2016-03-16 2018-08-21 黄河水利委员会黄河水利科学研究院 A kind of steel plastic compount polyurethane movable guide vane facade sealing device
CN106438160A (en) * 2016-12-22 2017-02-22 黄河水利委员会黄河水利科学研究院 Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine
CN113153607A (en) * 2021-03-11 2021-07-23 中国长江电力股份有限公司 Sealing structure and method for end face of guide vane of water turbine

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