JPS62225701A - Steam turbine - Google Patents

Steam turbine

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Publication number
JPS62225701A
JPS62225701A JP7168786A JP7168786A JPS62225701A JP S62225701 A JPS62225701 A JP S62225701A JP 7168786 A JP7168786 A JP 7168786A JP 7168786 A JP7168786 A JP 7168786A JP S62225701 A JPS62225701 A JP S62225701A
Authority
JP
Japan
Prior art keywords
steam
balance
regulating
holes
hole
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
JP7168786A
Other languages
Japanese (ja)
Inventor
Shigetoshi Ono
小野 繁利
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 JP7168786A priority Critical patent/JPS62225701A/en
Publication of JPS62225701A publication Critical patent/JPS62225701A/en
Pending legal-status Critical Current

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  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

PURPOSE:To improve performance and/or reliability of a steam turbine by providing disc parts of a multi-staged turbine rotary shaft with drilled balance holes of a command diameter and attaching regulating plates with regulating orifices to specified balance holes to make the passage area of said balance holes be determined at will. CONSTITUTION:Balance holes 7 are drilled out in disc parts of a rotary shaft 3 fitted with turbine blades 4, said balance holes being located on the same circumference around said rotary shaft 3 and with the same peripheral pitch between each other. Regulating plates (orifice) 9 made of a erosion-resisting material are fitted to said balance holes 7 and a regulating hole 10 is provided to each of said regulating plates 9, the inside diameter of said regulating hole 10 being smaller than that of said balance holes 7. Said regulating plates 9 are prepared with regulating holes 10 of various diameters to be selected at will. Attaching each of said regulating plates 9 to each balance hole of the rotary shaft at each stage and varying the diameters of regulating holes 10 of said regulating plates 9 at respective stages, distributed leak steam can be either blown into or induced from main steam Mo.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) 本発明【、1蒸気のタービンに係り、特に回転軸に設(
プられるバランスホールの通過蒸気母を最適値に調整し
得るようにした蒸気タービンに関する。
Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a single steam turbine, and particularly relates to a turbine installed on a rotating shaft.
The present invention relates to a steam turbine capable of adjusting the amount of steam passing through a balance hole to an optimum value.

(従来の技術) 蒸気タービンの各段落は、第9図に一部の断面を示すよ
うに、ノズルダイレフラム1に形成されたノズル2と、
このノズル2の下流側に位置する回転軸3に植設さ゛れ
たタービン羽根4とからタービン段落が構成されてJ3
す、主流蒸気M。はノズル2からタービン羽根4へ向(
)て噴出することによりタービン羽根4を介して回11
i軸3に回転力を与えるようになっている。前記ノズル
ダイヤフラム1には、回転軸3との対向面に多数の歯が
植設されたラビリンスパツキン5が配置されており、漏
洩蒸気M1を制限している。
(Prior Art) Each stage of a steam turbine includes a nozzle 2 formed in a nozzle diagonal frame 1, as shown in a partial cross section in FIG.
A turbine stage is constructed from the turbine blades 4 installed on the rotating shaft 3 located on the downstream side of the nozzle 2.
Mainstream steam M. is from the nozzle 2 to the turbine blade 4 (
) through the turbine blades 4
A rotational force is applied to the i-axis 3. On the nozzle diaphragm 1, a labyrinth packing 5 in which a large number of teeth are implanted is disposed on a surface facing the rotating shaft 3, and limits leakage steam M1.

上記うどリンスパツキン5から漏洩した蒸気M1は、ノ
ズルダイヤフラム1と回転軸3との間の通路6を通り、
一部は矢印M2で示すように、タービン羽根5へ流れ、
残りの蒸気M3は回転軸3に穿設されたバランスホール
7を通って矢印のように次段落へ流れる。
The steam M1 leaking from the rinse gasket 5 passes through the passage 6 between the nozzle diaphragm 1 and the rotating shaft 3,
A part of it flows to the turbine blade 5 as shown by arrow M2,
The remaining steam M3 passes through the balance hole 7 formed in the rotating shaft 3 and flows to the next stage as shown by the arrow.

上記の漏洩分配蒸気M、M3の中で特に漏洩蒸気流M2
は、主流蒸気M。へ混合する際に蒸気流に干渉を及ぼし
、蒸気タービンの性能に大きな影響を及ばず。その試験
結果を第10図に示すように、横軸に漏洩分配蒸気M2
の聞と主流蒸気Moの舟との比、縦軸にタービンでの内
部損失をとった場合、漏洩分配蒸気M2が第9図に示す
矢印のように主流蒸気M。へ吹出すような混合の状態の
場合、漏洩分配蒸気M2の吊にほり比例して内部損失Δ
ηが増加している。
Especially leakage steam flow M2 among the above-mentioned leakage distribution steam M, M3
is mainstream steam M. It interferes with the steam flow when mixing into the steam turbine, but does not significantly affect the performance of the steam turbine. The test results are shown in Figure 10, where the horizontal axis shows the leakage distribution steam M2.
If we take the internal loss in the turbine on the vertical axis, the leakage distribution steam M2 becomes the mainstream steam M as shown by the arrow in Fig. 9. In the case of a mixed state in which the steam is blown out to
η is increasing.

一方、漏洩分配蒸気M2が第9図に示す矢印とは反対方
向、ずなわら主流蒸気M。から吸込む状態においてtよ
、ある程度までは漏洩分配蒸気M2のmが増加するにし
たがい、内部性能は向上り゛るが、さらに増加すると内
部損失の増大を招く。このように漏洩分配蒸気M2は主
流蒸気M。より吸込み、かつ内部性能向上の最大となる
最適漏洩分配蒸気M2の足が存在する。
On the other hand, the leaked distributed steam M2 is in the opposite direction to the arrow shown in FIG. 9, and is the mainstream steam M. In the state of suction from t, internal performance improves to a certain extent as m of leaked distributed steam M2 increases, but further increase leads to an increase in internal loss. In this way, the leaked distribution steam M2 is the mainstream steam M. There exists an optimal leakage distribution steam M2 leg that provides maximum suction and maximum improvement in internal performance.

以上のように、各段落における内部性能を最高の状態で
運用させるよう、最適漏洩分配蒸気M2の量として主流
蒸気M。から吸込ませることが蒸気タービン運用上経済
的に右利となる。これを実現するには、ラビリンスパツ
キン5と回転軸3との間隙、およびバランスホール7の
穿孔径と個数を調整することにより最適漏洩分配蒸気M
2のh!で主流蒸気MOからの吸込みができるようには
9調整することができる。
As described above, in order to operate the internal performance in each stage at its best, the mainstream steam M is set as the optimal amount of leakage distribution steam M2. It is economically advantageous for steam turbine operation to draw in air from above. To achieve this, the optimum leakage distribution steam M
2 h! 9 can be adjusted to allow suction from the mainstream steam MO.

(発明が解決しようとする問題点) しかるに蒸気タービンは、通常第11図に示すように多
数対のノズル2おJ:びタービン羽根4が近接配置され
た構成であり、隣接段落のタービン羽根が植設された回
転軸3のディスク部同士の隙間が狭いため、バランスホ
ール7の孔あけには回転軸3の軸方向にあたかも串刺し
するようにドリルにより穿孔せざるをiqず、そのため
各段落におりるバランスボール7の内径および個数を任
意に選ぶことができない。したがって殆んどの蒸気ター
ビンのバランスホール7の穿孔径および穿設個数は各段
落において同一径、同一個数とならざるを得ないことに
なる。
(Problems to be Solved by the Invention) However, a steam turbine usually has a configuration in which multiple pairs of nozzles 2 and turbine blades 4 are arranged close to each other, as shown in FIG. Since the gap between the disk parts of the implanted rotating shaft 3 is narrow, it is necessary to drill the balance hole 7 in the axial direction of the rotating shaft 3 with a drill as if it were a skewer. The inner diameter and number of the balance balls 7 cannot be arbitrarily selected. Therefore, in most steam turbines, the diameter and number of balance holes 7 must be the same in each stage.

各段落におけるバランスホール7の穿孔径と個数がいず
れも等しいと、段落ごとにノズル2とタービン羽根4と
の圧力がそれぞれ異なるため、特定の段落では最適1T
11洩分配蒸気M2の砧および主流蒸気M。の吸込みが
達成されたどしても、他の段落では逆に漏洩分配蒸気M
2が主流蒸気M。へ吹出して蒸気タービンの性能を低下
さけるという事態がしばしば起っている。
If the diameter and number of balance holes 7 in each stage are equal, the pressure between the nozzle 2 and the turbine blade 4 will be different for each stage, so the optimum 1T for a particular stage
11 Leakage distribution steam M2 and mainstream steam M. Even if the suction of M is achieved, in other paragraphs the leakage distribution steam M
2 is mainstream steam M. Situations often occur in which the steam turbine's performance is degraded by blowing out to the steam turbine.

一方、蒸気タービンの性能向上を目的として漏洩分配蒸
気の主流蒸気M。への吸込みを行なわせるようにするこ
とに対し、性能向上よりはむしろ蒸気タービンの信頼性
向上を目的として、漏洩分配蒸気の主流蒸気M。への吹
出しを行なわせる場合がある。すなわら主流蒸気M。と
して高温蒸気を用いる蒸気タービンでは、回転軸3に植
設されたタービン羽根4の植込部が回転にJこる遠心力
により高い応力を受け、かつ高温の主流蒸気にざらされ
るため、タービン羽根4および回転軸3はその材料の強
度が低下し、非常に厳しい状況下におかれることになる
On the other hand, mainstream steam M is leakage distribution steam for the purpose of improving the performance of the steam turbine. For the purpose of improving the reliability of the steam turbine rather than improving the performance, the mainstream steam M of the leakage distribution steam is caused to be sucked into the leakage distribution steam. There are cases where you may be asked to make a speech bubble. In other words, mainstream steam M. In a steam turbine that uses high-temperature steam as a steam turbine, the implanted part of the turbine blade 4 installed in the rotating shaft 3 is subjected to high stress due to the centrifugal force exerted during rotation, and is also rubbed by high-temperature mainstream steam. 4 and the rotating shaft 3, the strength of their materials will be reduced and they will be placed under very severe conditions.

そこで、羽根植込部における材料の強度低下を防止する
ため、比較的低温の冷1(I蒸気を導入することにより
羽根植込部の冷却を行なうようにすることがある。
Therefore, in order to prevent the strength of the material in the blade implantation portion from decreasing, the blade implantation portion may be cooled by introducing relatively low-temperature cold 1 (I steam).

この場合には、第12図に示すように、先頭段落におけ
るノズルダイヤフラム1に主流然気M。
In this case, as shown in FIG. 12, there is a main stream of natural air M in the nozzle diaphragm 1 in the first paragraph.

と隔離するように隣接して配raされたパツキンヘッド
8にラビリンスパラ4:ン9を取付け、このうごリンス
パツキン9と回転軸3との間隙に比較的低温の冷却蒸気
M4を流入させ、この冷却蒸気M4をノズルダイヤフラ
ム1に設けられたラビリンスパツキン5と回転軸3との
間隙を通して通路6に導くようにしている。
A labyrinth para 4:n 9 is attached to the gasket head 8 arranged adjacent to and isolated from the labyrinth gasket 9, and relatively low-temperature cooling steam M4 is allowed to flow into the gap between the rinse gasket 9 and the rotating shaft 3. This cooling steam M4 is guided to a passage 6 through a gap between a labyrinth packing 5 provided on the nozzle diaphragm 1 and the rotating shaft 3.

上記通路6へ入った冷却蒸気M4の一部は、通路6から
直接主流蒸気M。へ吹出し、残りの冷W蒸気はバランス
ホール7を通って次段落へ流出する。
A part of the cooling steam M4 that has entered the passage 6 is directly converted into mainstream steam M from the passage 6. The remaining cold W steam passes through the balance hole 7 and flows out to the next stage.

このような漏洩分配蒸気を冷却蒸気として使用する揚台
においても、各段落のバランスホール7の穿孔径d3よ
び穿設個数が一定であると、段落ににっては主流蒸気M
。が通路6へ流れ込み、冷却が十分に行なえない箇所が
生じるという問題がある。
Even in a lifting platform that uses such leakage distribution steam as cooling steam, if the hole diameter d3 and the number of balance holes 7 in each stage are constant, the mainstream steam M in the stage is
. There is a problem in that the water flows into the passage 6 and some parts are not sufficiently cooled.

本発明は上述した事情を考慮してなされたもので、バラ
ンスホールを通る蒸気量を所望の値に選定し、漏洩蒸気
ににる主流蒸気の乱れを解消し、蒸気タービンの性能や
信頼性を向上させることができる熱気タービンを提供す
ることを目的とする。
The present invention was made in consideration of the above-mentioned circumstances, and it selects the amount of steam passing through the balance hole to a desired value, eliminates the disturbance in the mainstream steam caused by the leaked steam, and improves the performance and reliability of the steam turbine. The purpose is to provide a hot air turbine that can be improved.

〔発明の構成) (問題点を解決覆るための手段) 本発明は上記従来技術の問題点を解決するため、複数段
落の回転軸のディスク部に同一径のバランスボールを穿
設し、穿孔面積の過大なバランスホールには所要の調整
孔を右する調整板を取(Jけることによりバランスホー
ルの穿孔面積を任意に設定するようにしたことを特徴ど
するものである。
[Structure of the Invention] (Means for Solving and Overcoming Problems) In order to solve the problems of the above-mentioned prior art, the present invention drills balance balls of the same diameter in the disc portion of the rotating shaft in multiple stages, and reduces the drilling area. This is characterized by the fact that the perforation area of the balance hole can be arbitrarily set by installing an adjustment plate to fit the required adjustment hole in the oversized balance hole.

(作 用) 上記の構成により、バランスホールの穿孔径を各段落で
調整するうちの最も大きい内径で穿孔しておき、調整板
によって任意所望の内径の調整孔を容易に選定すること
ができ、これにより漏洩分配蒸気帛を調節して主流然気
への混合の意図的選定、あるいは冷W蒸気f71の調節
を行なう場合においても各段落への冷n1蒸気迅の調整
が可能となる。
(Function) With the above configuration, the hole diameter of the balance hole is drilled at the largest inner diameter among those adjusted in each stage, and the adjustment hole with any desired inner diameter can be easily selected using the adjustment plate. This makes it possible to adjust the speed of the cold n1 steam to each stage even when adjusting the leakage distributed steam to intentionally select the mixture to be mixed into the main stream, or to adjust the cold W steam f71.

(実施例) 以下本発明の実施例を第1図ないし第8図により、第9
図ないし第12図と共通する部分には同一符号を何して
説明する。
(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 8.
The same reference numerals are given to the parts common to those in the figures to FIG. 12 for explanation.

第1図はバランスホールとタービン羽根の位置関係を示
寸もので、ターごン羽根4が植設された回転軸3のディ
スク部分には回転軸3の軸心から同一円周上でかつ円周
方向に等間隔をおいて複数個のバランスホール7が穿設
されている。
Figure 1 shows the positional relationship between the balance hole and the turbine blades, and the disk part of the rotating shaft 3 in which the targon blades 4 are implanted is located on the same circumference and circularly from the axis of the rotating shaft 3. A plurality of balance holes 7 are bored at equal intervals in the circumferential direction.

第2図は前記バランスホール7に耐食材料で形成された
調整板くオリフィス)9を取付けた状態の第1図の側断
面を示している。この調整板9は、バランスボール7の
穿孔径J:り小さい内径の調整孔10を有してJ3つ、
この調整孔10の孔径はO馴から最大ではバランスホー
ル7の穿孔径と同径までの範囲内で任意に選択できるJ
:うに多種用なされ、この調整板9を各段落の回転軸3
に設+jられたバランスボール7に取イー1けることに
よって、各段落の調整板9の調整孔1oの孔径をそれぞ
れ微妙に変えることができ、これにより各段落の漏洩分
配蒸気M2を主益気M。へ吹出さけることや、吸込よぜ
ることが可能どイする。
FIG. 2 shows a side sectional view of FIG. 1 with an adjusting plate (orifice) 9 made of a corrosion-resistant material attached to the balance hole 7. This adjustment plate 9 has three adjustment holes 10 with an inner diameter smaller than the perforation diameter J of the balance ball 7.
The diameter of the adjustment hole 10 can be arbitrarily selected within the range from 0 to the same diameter as the balance hole 7.
: Sea urchins are used for many different types of sea urchins, and this adjusting plate 9 is connected to the rotating shaft 3 of each row.
By inserting a balance ball 7 into the balance ball 7 installed at the bottom, it is possible to slightly change the hole diameter of the adjustment hole 1o in the adjustment plate 9 of each stage. M. It can be blown out or sucked in.

上記調整板9の取付手段の具体例について説明すると、
第2図の場合は、バランスホール7の端縁に切欠段部1
1が形成され、調整板9の一端をかしめてこの段部11
に折り込むようにして固定されている。このかしめは、
第2図のΔ矢視方向からみた第3図に一例を示J゛よう
にかしめ工具にて数箇所(この例では4箇所)とされる
A specific example of the means for attaching the adjustment plate 9 will be explained below.
In the case of Fig. 2, there is a notched step 1 at the edge of the balance hole 7.
1 is formed, and one end of the adjustment plate 9 is caulked to remove this stepped portion 11.
It is fixed by folding it into the This caulking is
An example is shown in FIG. 3 as seen from the direction of the Δ arrow in FIG. 2, and as shown in FIG.

第4図は調整板9の1^1定をより確実にするため、調
整板9の外周にそった位置にあって調整板9に平行にす
るようにかしめ満12を設け、第6図に示寸にうに予じ
め設けられた調整板9の面取部13にぞってかしめ満1
2により形成された余肉部14を折り曲げることにより
調整板9の回転軸3への固定をJ、り確実強固にηるこ
とができるようにしたbのである。
In order to ensure the 1^1 constant of the adjustment plate 9, FIG. Fully caulk 1 along the chamfered part 13 of the adjustment plate 9, which has been provided in advance according to the indicated size.
By bending the extra wall portion 14 formed by 2, it is possible to securely and firmly fix the adjusting plate 9 to the rotating shaft 3.

第4図および第6図に示した調整板9は、漏洩分配然気
の入口側を蒸気が流入しやりいように丸みを6だせてい
るが、当該蒸気が、lt人しにくいJ、うにヅ−るため
に第7図に承りような調整板9の人口側の開口縁をエツ
ジにJることムでさる。これは調整孔10の孔径を変え
る手段によるほか蒸気入口側の開口縁形状の選択によっ
てもバランスホール7の通過蒸気量を調整することがで
きる。また第7図では、かしめ用の切欠段部11を形成
する分だけ回転軸3のディスク側面より主流蒸気入口側
に肉厚に形成されており、これにより切欠段部11の形
成による回転軸3の強度低下を防ぐことができる。
The adjusting plate 9 shown in Figs. 4 and 6 is rounded to allow steam to easily flow into the inlet side of the leaked air, but the steam is not easily accessible to people. In order to do this, insert the edge of the opening on the artificial side of the adjusting plate 9 as shown in FIG. The amount of steam passing through the balance hole 7 can be adjusted not only by changing the diameter of the adjustment hole 10 but also by selecting the shape of the opening edge on the steam inlet side. In addition, in FIG. 7, the thickness of the rotary shaft 3 is thicker on the mainstream steam inlet side than the disk side surface of the rotary shaft 3 by an amount corresponding to the formation of the notch step 11 for caulking. can prevent a decrease in strength.

第8図は、調整板9をタービン羽根4の主流蒸気出口側
に設けた場合の実施例を示すもので、この場合にお番プ
る調整板9の固定の仕方、および漏洩分配蒸気の流入側
の開[1縁形状等については、いずれも前述の各手段を
採用し得ることはもちろlυである。
FIG. 8 shows an embodiment in which the adjustment plate 9 is provided on the mainstream steam outlet side of the turbine blade 4. In this case, the method of fixing the adjustment plate 9 and the inflow of leakage distribution steam are shown. Of course, each of the above-mentioned means can be used for the side opening [1 edge shape, etc.].

(発明の効果〕 以上説明したように本発明は、複数段落の回転軸のディ
スク部に同一径のバランスホールを穿設し、穿孔面積の
過大なバランスホールには所要の調整孔を有する調整板
を取付けることによりバランスボールの穿孔面積を任意
に設定するようにしたので、バランスボールの実効穿孔
径および形状を任意に設定することができ、漏洩蒸気に
よる主流蒸気の乱れを生じることがなく、蒸気タービン
の性能を著しく向上することができる。また、冷却蒸気
を導くバランスホールの場合にあっても、調整板の調整
孔の孔径を適宜に選定することにより、各段落への冷却
蒸気量の調整ができ、これにより羽根の植込部の冷ね1
を十分に行なわせることができて蒸気タービンの信頼性
を大巾に向上することかできる。
(Effects of the Invention) As explained above, the present invention provides balance holes having the same diameter in the disk portion of a rotating shaft of multiple stages, and adjusting plates having required adjustment holes for balance holes with an excessively large hole area. Since the perforation area of the balance ball can be set arbitrarily by attaching a The performance of the turbine can be significantly improved.Also, even in the case of a balance hole that guides cooling steam, the amount of cooling steam to each stage can be adjusted by appropriately selecting the hole diameter of the adjustment hole in the adjustment plate. This allows cooling of the implanted part of the blade 1.
The reliability of the steam turbine can be greatly improved.

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

第1図は本発明を適用する蒸気タービンにおけるバラン
スホールと羽根との位置関係を示す斜視図、第2図は本
発明の一実施例を示す要部の断面図、第3図は第2図の
A矢視図、第4図は本発明の他の変形例を示す要部の断
面図、第5図は第4図のB矢視図、第6図は第4図の0
部の拡大断面図、第7図および第8図は本発明のさらに
他の変形例を示ず要部の断面図、第9図は従来の蒸気り
・  −ビンにおける1段落分のノズルダイヤフラムと
タービン羽根等を示す縦断面図、第10図は漏洩分配蒸
気M の♀と主流蒸気M。の量との比とり−ビンでの内
部損失との相関図、第11図および第12図は従来の蒸
気タービンにおける各段落の位置関係を示す説明図であ
る。 1・・・ダイ翫1フラム、2・・・ノズル、3・・・回
転軸、4・・・タービン羽根、5・・・ラビリンスパツ
キン、6・・・通路、7・・・バランスボール、8・・
・パツキンヘッド、9・・・調整板、10・・・調整孔
、11・・・切欠段部、12・・・かしめ溝、13・・
・面取部、14・・・余肉部。 出願人代理人  波 多 野    久第2図 第 3 回 $4図 $5図    $6図 第 θ 回 第1θ図
FIG. 1 is a perspective view showing the positional relationship between a balance hole and a blade in a steam turbine to which the present invention is applied, FIG. 2 is a sectional view of a main part showing an embodiment of the present invention, and FIG. , FIG. 4 is a sectional view of a main part showing another modification of the present invention, FIG. 5 is a view along arrow B in FIG. 4, and FIG.
FIGS. 7 and 8 are enlarged cross-sectional views of the main parts without showing still other modifications of the present invention, and FIG. 9 shows a nozzle diaphragm for one stage in a conventional steam bottle. FIG. 10 is a vertical cross-sectional view showing the turbine blades, etc., showing leakage distribution steam M ♀ and mainstream steam M. Figures 11 and 12 are explanatory diagrams showing the positional relationship of each stage in a conventional steam turbine. 1... Die rod 1 flam, 2... Nozzle, 3... Rotating shaft, 4... Turbine blade, 5... Labyrinth packing, 6... Passage, 7... Balance ball, 8・・・
・Packing head, 9...adjustment plate, 10...adjustment hole, 11...notch step, 12...caulking groove, 13...
- Chamfered portion, 14...Excess portion. Applicant's agent Hisashi Hatano Figure 2 Figure 3 Figure 4 Figure $5 Figure 6 Figure θ Figure 1 Theta

Claims (1)

【特許請求の範囲】 1、複数段落の回転軸のディスク部に同一径のバランス
ホールを穿設し、穿孔面積の過大なバランスホールには
所要の調整孔を有する調整板を取付けることによりバラ
ンスホールの穿孔面積を任意に設定するようにしたこと
を特徴とする蒸気タービン。 2、前記調整板の外周をバランスホールの周縁にかしめ
て固定したことを特徴とする特許請求の範囲第1項に記
載の蒸気タービン。 3、前記調整板の調整孔入口側内周縁を断面弧状および
角状に形成し、これら調整板を適度に選択混在して配置
したことを特徴とする特許請求の範囲第1項または第2
項に記載の蒸気タービン。 4、前記調整板を前記ディスクの後面付近に接するよう
に設けたことを特徴とする特許請求の範囲第1項ないし
第3項のいずれか1項に記載の蒸気タービン。
[Claims] 1. Balance holes with the same diameter are drilled in the disc portion of the rotary shaft of multiple stages, and balance holes with an excessively large drilled area are fitted with adjustment plates having the required adjustment holes. A steam turbine characterized in that the perforation area can be arbitrarily set. 2. The steam turbine according to claim 1, wherein the outer periphery of the adjustment plate is caulked and fixed to the periphery of the balance hole. 3. The inner circumferential edge of the adjustment plate on the entrance side of the adjustment hole is formed into an arcuate and angular cross-section, and these adjustment plates are appropriately selected and mixed and arranged.
The steam turbine described in Section. 4. The steam turbine according to any one of claims 1 to 3, wherein the adjustment plate is provided so as to be in contact with the vicinity of the rear surface of the disk.
JP7168786A 1986-03-28 1986-03-28 Steam turbine Pending JPS62225701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7168786A JPS62225701A (en) 1986-03-28 1986-03-28 Steam turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7168786A JPS62225701A (en) 1986-03-28 1986-03-28 Steam turbine

Publications (1)

Publication Number Publication Date
JPS62225701A true JPS62225701A (en) 1987-10-03

Family

ID=13467714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7168786A Pending JPS62225701A (en) 1986-03-28 1986-03-28 Steam turbine

Country Status (1)

Country Link
JP (1) JPS62225701A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06129202A (en) * 1992-10-15 1994-05-10 Toshiba Corp Device for restraining vibration of rotor in steam turbine
JP2009168019A (en) * 2008-01-10 2009-07-30 General Electric Co <Ge> Device for plugging turbine wheel hole
JP2010127281A (en) * 2008-11-26 2010-06-10 General Electric Co <Ge> Insert for through-holes and method therefor
JP2014177869A (en) * 2013-03-13 2014-09-25 Toshiba Corp Steam turbine
KR101663306B1 (en) * 2015-10-02 2016-10-06 두산중공업 주식회사 Gas Turbine disk

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06129202A (en) * 1992-10-15 1994-05-10 Toshiba Corp Device for restraining vibration of rotor in steam turbine
JP2009168019A (en) * 2008-01-10 2009-07-30 General Electric Co <Ge> Device for plugging turbine wheel hole
JP2010127281A (en) * 2008-11-26 2010-06-10 General Electric Co <Ge> Insert for through-holes and method therefor
JP2014177869A (en) * 2013-03-13 2014-09-25 Toshiba Corp Steam turbine
US10018046B2 (en) 2013-03-13 2018-07-10 Kabushiki Kaisha Toshiba Steam turbine
KR101663306B1 (en) * 2015-10-02 2016-10-06 두산중공업 주식회사 Gas Turbine disk
EP3150798A1 (en) * 2015-10-02 2017-04-05 Doosan Heavy Industries & Construction Co., Ltd. Gas turbine disk
WO2017057994A1 (en) * 2015-10-02 2017-04-06 두산중공업 주식회사 Gas turbine disc
US10605085B2 (en) 2015-10-02 2020-03-31 DOOSAN Heavy Industries Construction Co., LTD Gas turbine disk

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