JPS59105904A - Labyrinth packing - Google Patents

Labyrinth packing

Info

Publication number
JPS59105904A
JPS59105904A JP21546082A JP21546082A JPS59105904A JP S59105904 A JPS59105904 A JP S59105904A JP 21546082 A JP21546082 A JP 21546082A JP 21546082 A JP21546082 A JP 21546082A JP S59105904 A JPS59105904 A JP S59105904A
Authority
JP
Japan
Prior art keywords
packing
turbine
turbine rotor
leakage
fin
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
JP21546082A
Other languages
Japanese (ja)
Inventor
Miharu Fukazawa
深沢 美治
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 JP21546082A priority Critical patent/JPS59105904A/en
Publication of JPS59105904A publication Critical patent/JPS59105904A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PURPOSE:To reduce the leakage of turbine working fluid, enhance the turbine efficiency and enable to protect a turbine rotor or the like from being damaged by a structure wherein packing fins made of an alloy containing the respective specified weight percentages of Mn, Cu and Ni. CONSTITUTION:A gap between the free end of a packing fin 6 and the surface of a turbine rotor 1 constitutes the throttled part of a leakage passage, while a space between adjoining packing fins 6 constitutes its expanded part. The repetition of said throttled and expanded parts prevents steam from leaking. A packing ring 4 including the packing fins 6 is made of an alloy, which is constituted of 70-73wt% Mn, 17-19.5wt% Cu and 9-11wt% Ni and has a large thermal expansion coefficient. In addition, the alloy with the limited range of composition as mentioned just above causes no rise of its hardness by being quenched through the heating and quick cooling in the contact with the rotor due to the abnormal vibration of a turbine or the like and no damage and scattering of labyrinth packing fins is resulted by retouching with the rotator. Accordingly, the increase of leakage can be prevented from occurring and consequently the improvement of turbine efficiency is resulted. Furthermore, the turbine rotor and the like are free from being damaged.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は蒸気タービン等に用いられるラビリンスパツキ
ンに関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a labyrinth packing used in steam turbines and the like.

〔発明の技術的背漿吉、その問題点〕[Technical merits of the invention and its problems]

一般にタービンのタービン作動流体、例えハ蒸気の漏洩
防止のだめに各種パツキンが用いられている。例えば蒸
気タービンのタービンロータとケーンング吉の隙間等で
生L;るロータ軸線方向に沿った蒸気の漏洩通路からの
漏洩を防止するために用いられるものにラビリンスパツ
キンがある。このラビリンスパツキンは、タービンロー
タの表面シてタービンロータの軸の円周溝が多数膜けら
れ、ケーシングに一端が固定されたパツキンフィンの曲
端が自由端として溝IJ5設けられたタービンロータ表
面に近接するよ、うに設けられている。このパツキンフ
ィンはタービンロータ軸方向に複数個設けられ、タービ
ンロータとケーシングとの隙間に狭部、拡大部を多数形
成するっ このようlてラビリンスパツキンが設けられていると、
漏洩する蒸気が狭部にて絞られ、拡大部にて速度つS減
殺されることを繰返し、蒸気の漏洩が防止さ丸る。
Generally, various gaskets are used to prevent leakage of turbine working fluid, such as steam. For example, a labyrinth packing is used to prevent leakage of steam from a leakage passage along the rotor axis, which occurs in a gap between a turbine rotor and a shaft of a steam turbine. This labyrinth packing has many circumferential grooves on the shaft of the turbine rotor on the surface of the turbine rotor, and the curved end of the packing fin, one end of which is fixed to the casing, is provided as a free end with grooves IJ5 on the surface of the turbine rotor. It is set up so that you can get close to each other. A plurality of these packing fins are provided in the axial direction of the turbine rotor, and when a labyrinth packing fin is provided like this, which forms many narrow parts and enlarged parts in the gap between the turbine rotor and the casing,
The leaking steam is constricted in the narrow part and the velocity and S are reduced in the expanded part, which are repeated to prevent steam leakage.

しかし々l)Sら、蒸気タービン作動には例えば、56
6°0246 、°g/ i程度の高幅高圧蒸気を用い
るので蒸気タービン作動時の温度上昇に伴ない、ケーシ
ングとタービンロータとの隙間等の漏洩通路が熱膨張に
より広がってしまい、漏洩蒸気量が増加してしまうとい
う問題点があった。このような漏洩蒸気の増加は圧力損
失をもたらし蒸気タービンの効率を低Fさすてしまうと
いう問題改もあった。
However, S et al., for steam turbine operation, e.g.
Since wide-width, high-pressure steam of approximately 6°0246°g/i is used, as the temperature rises during steam turbine operation, leakage passages such as the gap between the casing and the turbine rotor expand due to thermal expansion, and the amount of leaked steam increases. There was a problem in that the number increased. There is also the problem that such an increase in leakage steam causes pressure loss and reduces the efficiency of the steam turbine.

このような熱膨張による蒸気の漏洩は、高効率化のrr
−、fの蒸気の高温高圧化に伴ない顕著なものとなって
きた。
Steam leakage due to such thermal expansion is a problem in improving efficiency.
-, f has become more prominent as the temperature and pressure of steam increases.

以上のような漏洩を防止するためには、パツキンフィン
七タービンロータさの間隔の縮少、パツキンフィンの数
の増加等の方法が考えられるが、前者性ラビングきいう
運転上のトラブル(、でつながりタービンロータ等の損
傷の問題があり、後者はスパンの増長につなが9これに
伴いタービンロータが長くなる等の問題があるため、お
のずから限界が4す、漏洩蒸気量の減少は非常に難しい
ものであった。
In order to prevent the above-mentioned leakage, methods such as reducing the spacing between the fins and the turbine rotor and increasing the number of fins can be considered, but the former may cause operational troubles such as rubbing. There is the problem of damage to the connected turbine rotor, etc., and the latter leads to an increase in the span.9 This naturally leads to problems such as the turbine rotor becoming longer, so reducing the amount of leaked steam is extremely difficult. Met.

〔発明の目的〕[Purpose of the invention]

本発明は以上の点を考慮してなされたもので、タービン
作動流体の漏洩を減少し、タービン効率を向トし、さら
にタービンロータ等に損傷を与えるのを防止したラビリ
ンスパツキンを提供することを目的とする。
The present invention has been made in consideration of the above points, and it is an object of the present invention to provide a labyrinth packing that reduces leakage of turbine working fluid, improves turbine efficiency, and prevents damage to the turbine rotor and the like. purpose.

〔発明の概要〕[Summary of the invention]

本発明。のラビリンスパツキンは、タービンロータとケ
ージングの隙間、タービンロータ吉ノズルダイヤフラム
の内輪との隙間、ケーシングと動翼上の隙間等のターピ
ノ作動流体の漏洩通路に狭部、拡大部を形成するように
1重量係でMl 70〜7:贈、Cu 17〜19.5
%、Niq 〜uzの合金がらなろパツキンフィンが設
けられている。このMn −Cu−Ni合金からなるパ
ツキンフィンはこの合金自身の持つ大きい熱膨張係数に
よりタービン作動時の高温環境で、この漏洩通路を狭く
する方向に大きく熱膨張変位するように構成されている
This invention. The labyrinth seal is designed to form narrow and enlarged parts in the leakage passage of the turpino working fluid, such as the gap between the turbine rotor and the casing, the gap between the inner ring of the turbine rotor nozzle diaphragm, and the gap between the casing and the rotor blade. Weight staff Ml 70~7: gift, Cu 17~19.5
%, Niq ~ uz alloys are provided with a rotary packing fin. The packing fin made of this Mn--Cu--Ni alloy is configured to undergo large thermal expansion displacement in the direction of narrowing this leakage passage in a high temperature environment during turbine operation due to the large thermal expansion coefficient of this alloy itself.

タービン作動流体としては蒸気、高温燃焼ガス等の高温
高圧の流体を用いるので、タービン作動時の温度上昇に
伴なうケージング、タービンロータ等の熱膨張により前
述の漏洩通路の隙間が広がるが、本発明によればパツキ
ンフィンが前述のケーシング、タービンロータ、動翼等
に比較して非常に大きい熱膨張係数の合金であるため、
それ自身の大きい熱膨張量によりこの漏洩通路を狭くす
るように熱膨張変位するので、熱膨張による漏洩通路の
広がりによるタービン作動流体の漏洩量の増加を防IF
するこ吉ができる〇 なお、本ラビリンスパツキンにMn −Cu −N’ 
合金を使用するこ吉により、タービン熱効率を向上させ
得る理由さしては先に述べだ熱膨張係数に加え前記限定
された組成範囲の合金が、タービンの異常振動などによ
るロータとの接触に対し、加熱、急冷却され焼が入ると
いうような硬さの上昇がなく、再接触てより、ラビリン
スパツキンフィンが破損・1赦しないことを見出した事
による。
As the turbine working fluid uses high-temperature, high-pressure fluid such as steam or high-temperature combustion gas, the gaps in the leakage passages described above widen due to the thermal expansion of the casing, turbine rotor, etc. due to the rise in temperature during turbine operation. According to the invention, the packing fin is made of an alloy with a much larger coefficient of thermal expansion than the aforementioned casing, turbine rotor, rotor blades, etc.
Since it undergoes thermal expansion displacement to narrow this leakage passage due to its own large amount of thermal expansion, it prevents an increase in the amount of leakage of the turbine working fluid due to the expansion of the leakage passage due to thermal expansion.
Sukokichi can be done〇In addition, this labyrinth patchkin has Mn -Cu -N'
The reason why turbine thermal efficiency can be improved by using alloys is that in addition to the thermal expansion coefficient mentioned above, alloys with the limited composition range have a high resistance to heating due to contact with the rotor due to abnormal vibrations of the turbine, etc. This is because it was discovered that there was no increase in hardness due to rapid cooling and quenching, and that the labyrinth packing fin did not break or break even after contacting it again.

ここで、本発明に係るMn−C0−Ni合金の組成限定
について説明すると、CLIはMll中に固溶し、合金
の熱膨張係数を向上させるに必要な元素で、17q6未
満吉19.5%を越えると熱膨張係数を低下させること
から17係〜19.5%の範囲とする。NiはCLIと
同様に合金の熱膨張係数を向上させるに必要な元素で、
9q6未満と11チを越えると熱膨張係数を低下させる
ことから9係〜11チの範囲とする。
Here, to explain the compositional limitations of the Mn-C0-Ni alloy according to the present invention, CLI is an element that is dissolved in Mll and is necessary to improve the coefficient of thermal expansion of the alloy. If it exceeds this, the coefficient of thermal expansion decreases, so it is set in the range of 17% to 19.5%. Like CLI, Ni is an element necessary to improve the coefficient of thermal expansion of the alloy.
If it is less than 9q6 or more than 11 inches, the coefficient of thermal expansion will be lowered, so it is set in the range of 9 coefficients to 11 inches.

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

本発明を蒸気タービンのタービンロータとケ−・イーン
グ吉の隙間からの蒸気漏洩の防止に用いた実施例を示す
。第1図に蒸気タービンの部分断面図を示すっ タービンロータ(1)の表面には、ターピノロータ(1
)の回転軸上同軸の円周n(2)つS ’lfh jj
向に複数個設けら粍ている。またケーシング(3)には
円弧状のパツキンリング(4)が例えばバネ等の伸縮可
能な固定部材(5)にて固定され、このようなパツキン
リング(4)は複数個組合わせられ円環状に構成されて
いる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is used to prevent steam leakage from a gap between a turbine rotor and a key ring of a steam turbine will be shown. Fig. 1 shows a partial cross-sectional view of a steam turbine.
) coaxial circumference n(2) on the axis of rotation S 'lfh jj
There are multiple units installed in each direction. Further, an arc-shaped packing ring (4) is fixed to the casing (3) with an extensible fixing member (5) such as a spring, and a plurality of such packing rings (4) are combined to form an annular shape. It is configured.

このパツキンリング(4)のタービンロータ(1)に対
向する表面ばはパツキンフィン(6)がタービンロータ
(1)軸線方向にそって複数個設けられており、このパ
ツキンフィン(61の一端はパツキンリング(4) K
 固定あるい1寸パツキンリング(4)と一体成形され
、他端は自由端上してタービシロータ(1)の円周溝(
2)が設けられた表面に近接するように設けられている
A plurality of packing fins (6) are provided along the axial direction of the turbine rotor (1) on the surface of the packing ring (4) facing the turbine rotor (1). Ring (4) K
It is fixed or integrally molded with a 1-inch packing ring (4), and the other end is placed above the free end into the circumferential groove (
2) is provided in close proximity to the surface on which it is provided.

従ってパツキンフィン(6)の自由端とタービンロータ
(1)表面との隙間で漏洩通路の狭部を構成し、隣ゆあ
うパツキンフィン161の間が拡大部とな抄、との狭部
、拡大部の繰り返しにより蒸気の漏洩を防ぐこと((な
る。このパツキンリング(4)とパツキンフィン(6)
は1重量俤でMn 70〜73%、Cu 17〜19.
5q6Ni9〜11係からなる大きい熱膨張係数の合金
で構成され、その製作は、従来法と同様の製造法によっ
た0 第1表に本発明例のMn −C0−Ni合金および従来
例の5%りん青銅と13%Cr鋼の機械的性質、熱的性
質を示す。
Therefore, the gap between the free end of the packing fin (6) and the surface of the turbine rotor (1) constitutes a narrow part of the leakage passage, and the space between adjacent packing fins 161 is an enlarged part. By repeating this step, you can prevent steam leakage.
is 70-73% Mn and 17-19% Cu per weight.
It is composed of an alloy with a large coefficient of thermal expansion consisting of 5q6Ni9 to 11, and is manufactured using the same manufacturing method as the conventional method. % phosphor bronze and 13% Cr steel.

第  1  表 このMn−Cl1−Ni合金で製造されたパツキンリン
グおよびパツキンフィンは従来例である。たとえば5係
りん青銅あるいは15%C「銅製のパツキンリングおよ
びパツキンフィンに比較して、第1表に示したようにそ
の機械的性質が大差なく、パツキンフィンf6)、!:
しての兼備特性であるタービンロータ(1)と接触した
場合の摩擦熱による高温加熱とその後の急冷却による硬
さト昇、あるいは接触圧力による加工硬化などが無く、
すみやかに摩耗しタービンロータ(1)表面の損傷が少
ない。また、再接触が生じてもパツキンフィン(6)が
割れずタービン内へ飛散し、事故の原因とならないなど
優れた特性をもっている。
Table 1 Packing rings and packing fins manufactured from this Mn-Cl1-Ni alloy are conventional examples. For example, compared to 5% phosphor bronze or 15% C copper packing rings and packing fins, there is no significant difference in mechanical properties as shown in Table 1, and packing fins f6),!:
There is no increase in hardness due to high-temperature heating due to frictional heat and subsequent rapid cooling when it comes into contact with the turbine rotor (1), which is a combined characteristic of a turbine rotor (1), or work hardening due to contact pressure.
It wears out quickly and there is little damage to the surface of the turbine rotor (1). In addition, even if contact occurs again, the packing fin (6) will not break and will be scattered into the turbine, which has excellent properties such as not causing an accident.

以上のように構成された蒸気タービンにおいては、高温
蒸気によりタービンロータ(1)及びケーシング(3)
(!:もに熱膨張を生じ、タービンロータ(1)トケー
シングC3)との隙間が広がるが、大きい熱膨張係数に
伴なう大きな熱膨張量によりパンキンフィン(6)がこ
の隙間を狭くする方向に変位するので、前記隙間の広が
りをうちけすことができ、パツキンフィン(6)の自由
端の先端とタービンロータ(1)表面との間隔が広がる
ことがない。よってこの間隔の広がりによる漏洩蒸気量
の増加を防止することができるので、蒸気タービン効果
が向上される、近年熱効率向上を目的とし蒸気の高温・
高圧化の傾向があるが、高温となるにつれこの熱膨張に
より間隙の広がりが顕著になるので1本発明の間隙の広
がりを防上する効果は非常に有効となり、タービン効率
の向上につながる。まだ高温高圧化に伴ないタービンロ
ータ、ケーシング等の材料に従来の鉄基フェライト系鋼
にかえて鉄基オーステナイト鋼の使用が検討されている
が、前者の熱膨張係数約12.5X10 ’/’OK比
べ後者は約ls、s xto ’/’Q 、Jz 1.
5培も大きい。二って熱膨張による隙間の広がりも顕著
となるが、本発明のごとくパツキンリング(4)および
パツキンフィン(6)自体に大きな熱膨張変位埼をもた
せることにより、パツキンリング(4)′11.;−よ
びパツキンフィン(6)の長さの変位量を大きくとるこ
とが可能であるので、本発明の効果は特に有効となる。
In the steam turbine configured as described above, high temperature steam causes the turbine rotor (1) and the casing (3) to
(!: Both generate thermal expansion, and the gap between the turbine rotor (1) and casing C3) widens, but the punching fin (6) narrows this gap due to the large amount of thermal expansion associated with the large coefficient of thermal expansion. Since it is displaced in the direction, the gap can be prevented from widening, and the distance between the free end of the packing fin (6) and the surface of the turbine rotor (1) does not widen. Therefore, it is possible to prevent an increase in the amount of leaked steam due to the widening of this gap, thereby improving the steam turbine effect.
There is a tendency for the pressure to increase, but as the temperature increases, the gap widens more significantly due to this thermal expansion, so the effect of the present invention to prevent gap widening is very effective, leading to improved turbine efficiency. The use of iron-based austenitic steel in place of conventional iron-based ferritic steel for materials such as turbine rotors and casings is still being considered due to the rise in high temperatures and pressures, but the thermal expansion coefficient of the former is approximately 12.5 x 10 '/'. OK compared, the latter is about ls, s xto '/'Q, Jz 1.
5 times is also big. Secondly, the gap widens significantly due to thermal expansion, but by giving the packing ring (4) and the packing fin (6) themselves a large thermal expansion displacement as in the present invention, the packing ring (4)'11. ;- and the length of the packing fin (6) can be increased, so the effects of the present invention are particularly effective.

まだパツキンリング(4)は伸縮可能な固定部材(5)
にて固定されているので、何らかの原因でパツキンフィ
ン(6)がタービンロータ(1)に接触した場合この固
定部材(5)が縮み、パツキンフィン(6)とタービン
ロータとの接触を緩和することができ、この接−触によ
るタービンロータ(1)の損傷を防IFするこ古がでへ
る。
The packing ring (4) is still an expandable fixing member (5)
Since the fixing member (5) is fixed in place, if the packing fin (6) comes into contact with the turbine rotor (1) for some reason, this fixing member (5) will contract and alleviate the contact between the packing fin (6) and the turbine rotor. This makes it difficult to prevent damage to the turbine rotor (1) due to this contact.

パッキンフィ/16)のパツキンリング(4)への固定
方法は、植込み、ボルト止め、溶接、ピン市め、カシメ
などの一般の固定方法でよい。さらにパツキンフィン(
6)を高圧側Aに傾斜するように設ければ、高圧の蒸気
によりパンキンフィン(6)が押されパツキンフィン(
6)は蒸気漏洩通路を狭くする方向に変位するので、さ
らに蒸気の漏洩量を減少するこ吉ができる。中だ、パツ
キンフィン(6)を1頃、科して配肯することは、パン
キンフィン自体にバネ効果をもたせること((なるので
、何らかの原因でパツキンフィン(6)がタービンロー
タに接触した場合このバネ効果により曲がり、パツキン
フィン+6)とタービンロータとの接触を緩和すること
ができ、この接触によるタービンロータ(1)の損傷を
防止することができる。
The packing fitting/16) may be fixed to the packing ring (4) by a general fixing method such as implantation, bolting, welding, pin insertion, or caulking. In addition, Patsukinfin (
6) is installed so as to be inclined toward the high pressure side A, the punching fin (6) will be pushed by the high pressure steam and the punching fin (6) will be pushed by the high pressure steam.
6) is displaced in the direction of narrowing the steam leakage passage, thereby further reducing the amount of steam leakage. In the middle of the day, by applying the packing fin (6) around 1, it is possible to give the packing fin itself a spring effect ((because for some reason the packing fin (6) comes into contact with the turbine rotor This spring effect bends and eases the contact between the packing fin +6) and the turbine rotor, making it possible to prevent damage to the turbine rotor (1) due to this contact.

以上の実施例ではパツキンリングとパツキンフィンを一
体成形した場合、およびパッキンリング″こパツキンフ
ィンを接合した場合を説明したが、直接ケーシングにパ
ツキンフィンを設けてもよい。
In the above embodiments, the packing ring and the packing fin are integrally molded, and the packing ring and the packing fin are joined together. However, the packing fin may be provided directly on the casing.

このように直接ケーシングにパツキンフィンを設けた場
合でも、前述のようにパツキンフィンを傾斜して配置道
するこ吉によりパツキンフィン自体にバネ効果をもたせ
るこ吉ができるので、パツキンリングを伸縮可能な固定
部材で固定したのと同等の効果を得ろことができる。さ
らに本発明では漏洩通路の広がりを防止できるので、蒸
気漏洩減少のために設けられているタービンロータ表面
の円周波の深さを小さく又はなくしてしまうこ吉が可能
でちる。この円周溝は熱応力の集中、蒸気量が起こす鴨
<応力腐食割れ、腐食波力などのタービンロータの環境
破壊の一因となり、この上うに円周溝を小さく又はなく
すことにより、このようなタービンロータの環境破壊の
一因を除去することができ、タービンの信頼性を向上す
ることができる。
Even if the packing fin is installed directly on the casing in this way, as mentioned above, by arranging the packing fin at an angle, it is possible to create a spring effect on the packing fin itself, so the packing ring can be expanded and contracted. It is possible to obtain the same effect as fixing with a fixing member. Furthermore, since the present invention can prevent the leakage passage from widening, it is possible to reduce or eliminate the depth of the circular frequency waves on the surface of the turbine rotor, which are provided to reduce steam leakage. This circumferential groove contributes to environmental damage to the turbine rotor, such as concentration of thermal stress, stress corrosion cracking caused by the amount of steam, and corrosive wave force. It is possible to eliminate a cause of environmental damage to the turbine rotor, and improve the reliability of the turbine.

まだタービンロータとケーシングとの隙間からの蒸気漏
洩を防止する他にケーシングと動式との隙間、ノズルダ
イヤフラムとタービンロータとの隙間等のタービンロー
タ軸線方向の蒸気漏洩通路からの蒸気漏洩を防止するだ
めに用いてもよい。
In addition to preventing steam leakage from the gap between the turbine rotor and casing, it also prevents steam leakage from steam leakage passages in the axial direction of the turbine rotor, such as the gap between the casing and the dynamic type, and the gap between the nozzle diaphragm and the turbine rotor. It may be used in vain.

動翼(7)とケーシング(3)との隙間からの蒸気漏洩
を防1トするだめにラビリンスパツキンを用いた本発明
の他の実施例を第2図に概略的に示す。
FIG. 2 schematically shows another embodiment of the present invention in which a labyrinth packing is used to prevent steam leakage from the gap between the moving blade (7) and the casing (3).

ケーシング(3)には高熱膨張係数を有する重数チでM
l 70〜73 Ll)、Cu 17〜19.5%、N
I9〜10チの合金板からなるパツキンフィン(6)が
固定されており、動翼(力の回転軸方向に複数個設けら
れている。
The casing (3) has a high thermal expansion coefficient of M
l 70-73 Ll), Cu 17-19.5%, N
A packing fin (6) made of an I9-10 alloy plate is fixed, and a plurality of rotor blades (a plurality of rotor blades are provided in the direction of the rotation axis of force).

このパツキンフィン(6)は先端が細くなるように構成
され、この先端が動翼(力に近接され、パツキンフィン
(6)は動翼(力に向って垂直あるいは高圧側AK傾斜
して配I!されている。
The packing fin (6) is configured to have a tapered tip, and this tip is placed close to the moving blade (force), and the packing fin (6) is arranged vertically toward the moving blade (force) or tilted on the high pressure side AK. !It has been done.

このように構成されたラビリンスパツキンではタービン
作動時の温度上昇に伴なう熱膨張による隙間の広がりを
、パツキンフィン(6)の大きい熱膨張変位看により打
消すことができるので、漏洩蒸気量を減少することがで
きる。まだ傾斜配置されたパツキンフィン(6)はバネ
効果を有するので、何らかの原1汀でパツキンフィン(
6)が@R(カに接触し/ζ場合でもこの接触を緩和す
ることができ、動翼(力に損傷を与えるのを防止できる
。唾だ、パツキンフィン(6)は先端が細くなっている
ため摩耗しゃすく、接触した場合でもパツキンフィン(
6)が速やかに摩耗し動翼(刀に損傷を与えるのを防止
できるθ〔発明の効果〕 以上説明したように本発明によれば、熱膨張によるター
ビン作動流体の漏洩通路の拡張に伴なう作動流体の漏洩
の増加を防止することができるので、タービン効率を向
上するこ吉がでへる。したり4って大幅な燃料費の節約
等の利改も生じ非常に有効で、ちる。またパンキンフィ
ンがタービンロータ等(て接詐した場合でも、タービン
ロータ等に損傷を与えると七がないのでターピノ運転に
おいても非常に有効である。
With the labyrinth packing configured in this way, the widening of the gap due to thermal expansion accompanying the temperature rise during turbine operation can be canceled out by the large thermal expansion displacement of the packing fin (6), so the amount of leaked steam can be reduced. can be reduced. The patch fin (6), which is still tilted, has a spring effect, so the patch fin (6) is still tilted at an angle.
Even if 6) comes into contact with @R (force/ζ), this contact can be alleviated and damage to the moving blade (force) can be prevented. Because of this, it wears easily, and even if there is contact, it will cause damage to the fins (
6) can be prevented from quickly wearing out and damaging the rotor blade (effect of the invention). As explained above, according to the present invention, as the leakage path of the turbine working fluid expands due to thermal expansion, Since it is possible to prevent an increase in the leakage of working fluid, it is possible to improve the efficiency of the turbine.It is also very effective to improve the efficiency of the turbine, such as greatly reducing fuel costs. Also, even if the punching fin touches the turbine rotor, it will not cause any damage to the turbine rotor, so it is very effective in turpino operation.

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

、lX 1図は本発明の詳細な説明するだめの蒸気ター
ビンの部分断面図、第2図は本発明の他の実施例を示す
断面概略図。 4・・・パーツキンリング、 6・・・パツキンフィン0 第1図 第2図
, lX Figure 1 is a partial cross-sectional view of a steam turbine for detailed explanation of the present invention, and Figure 2 is a schematic cross-sectional view showing another embodiment of the present invention. 4... Partskin ring, 6... Partskin fin 0 Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] タービン作動流体の漏洩1由路に狭部及び拡大部を1形
成すもtうに設けられたパツキンフィンを具備するラビ
リンスパツキンにおいて、前記バンキンフィ/の材料と
して重睦慢で70〜73q6のマンガン、17〜19.
5%の銅、9〜11%のニッケルからなる合金を使用し
たことを特徴とするラビリンスパツキン。
In a labyrinth packing comprising packing fins that are provided to form a narrow part and an enlarged part in a leakage path of turbine working fluid, the material of the bunkin fin is heavy manganese with an amount of 70 to 73q6, 17 ~19.
Labyrinth packing characterized by using an alloy consisting of 5% copper and 9 to 11% nickel.
JP21546082A 1982-12-10 1982-12-10 Labyrinth packing Pending JPS59105904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21546082A JPS59105904A (en) 1982-12-10 1982-12-10 Labyrinth packing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21546082A JPS59105904A (en) 1982-12-10 1982-12-10 Labyrinth packing

Publications (1)

Publication Number Publication Date
JPS59105904A true JPS59105904A (en) 1984-06-19

Family

ID=16672737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21546082A Pending JPS59105904A (en) 1982-12-10 1982-12-10 Labyrinth packing

Country Status (1)

Country Link
JP (1) JPS59105904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02245581A (en) * 1988-12-14 1990-10-01 General Electric Co <Ge> Labyrinth seal device
CN102865108A (en) * 2011-07-04 2013-01-09 阿尔斯通技术有限公司 A labyrinth seal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02245581A (en) * 1988-12-14 1990-10-01 General Electric Co <Ge> Labyrinth seal device
CN102865108A (en) * 2011-07-04 2013-01-09 阿尔斯通技术有限公司 A labyrinth seal
JP2013019537A (en) * 2011-07-04 2013-01-31 Alstom Technology Ltd Labyrinth seal
US9057279B2 (en) 2011-07-04 2015-06-16 Alstom Technology Ltd Labyrinth seals
CN102865108B (en) * 2011-07-04 2016-05-04 阿尔斯通技术有限公司 Labyrinth

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