JPH05125902A - Falling out preventing structure for dummy ring pin. - Google Patents
Falling out preventing structure for dummy ring pin.Info
- Publication number
- JPH05125902A JPH05125902A JP31386891A JP31386891A JPH05125902A JP H05125902 A JPH05125902 A JP H05125902A JP 31386891 A JP31386891 A JP 31386891A JP 31386891 A JP31386891 A JP 31386891A JP H05125902 A JPH05125902 A JP H05125902A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- dummy ring
- hole
- stopper
- falling out
- 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.)
- Withdrawn
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、蒸気タービンに適用さ
れるダミー環ピン抜止め構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dummy ring pin retaining structure applied to a steam turbine.
【０００２】[0002]
【従来の技術】一般に、蒸気タービンにおいては、その
内部の圧力が異なる部分を仕切るのにダミー環が使用さ
れる。図４〜図７は従来の蒸気タービンの一例を示す。
本例の蒸気タービンでは、図４に示す高圧部１と中圧部
２との間には定格出力において約６０ｋｇ／ｃｍ2の圧
力差があり、この間を仕切るのに高圧ダミー環３が設け
られている。2. Description of the Related Art Generally, in a steam turbine, a dummy ring is used to partition a portion having different internal pressures. 4 to 7 show an example of a conventional steam turbine.
In the steam turbine of this example, there is a pressure difference of about 60 kg / cm 2 between the high pressure portion 1 and the intermediate pressure portion 2 shown in FIG. 4 at the rated output, and the high pressure dummy ring 3 is provided to partition this portion. ing.
【０００３】そして、図４〜図７に示すように、該高圧
ダミー環３には複数のシールリング４が設けられてお
り、該シールリング４に取り付けられている多数のシー
ルフィン５とロータ６との間でラビリンスを構成してい
る。また、高圧ダミー環３に嵌め込まれているシールリ
ング４の回り止めと、上半部からの落下防止とのため、
該上半部の水平継手面付近にあけたピン穴７を通してピ
ン８が設けられている。なお、図４において、符号９は
外車室を示す。As shown in FIGS. 4 to 7, the high-pressure dummy ring 3 is provided with a plurality of seal rings 4, and a large number of seal fins 5 and rotors 6 attached to the seal rings 4. It forms a labyrinth with. Further, in order to prevent the seal ring 4 fitted in the high-pressure dummy ring 3 from rotating and to prevent the seal ring 4 from falling from the upper half,
A pin 8 is provided through a pin hole 7 formed in the upper half portion near the horizontal joint surface. In addition, in FIG. 4, reference numeral 9 indicates an outer vehicle compartment.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、以上述
べた従来の蒸気タービンの構造にあっては、高圧ダミー
環３のピン８はピン穴７との間の隙間を漏洩する蒸気流
１０（図６参照）によって励振され、該ピン８の端部の
ねじ１１のかしめが緩み、これによってピン８の断面積
に加わる圧力差によってピン８が下流側へ抜け出ること
がある。However, in the structure of the conventional steam turbine described above, the pin 8 of the high pressure dummy ring 3 leaks through the gap between the pin 8 and the pin hole 7 (see FIG. 6). When the pin 8 is excited, the caulking of the screw 11 at the end of the pin 8 is loosened, whereby the pressure difference applied to the cross-sectional area of the pin 8 may cause the pin 8 to escape to the downstream side.
【０００５】そして、該ピン８が抜け出ると、高圧ダミ
ー環３の下流にある中圧タービンディスク１２にピン８
の端部が当接する。これによって、中圧タービンディス
ク１２が損傷したり、また該中圧タービンディスク１２
と摩擦することによってピン８の端部が折れ、該ピン８
の破片が中圧の翼列に流入して該翼列を損傷することが
あった。When the pin 8 comes out, the pin 8 is attached to the intermediate pressure turbine disk 12 downstream of the high pressure dummy ring 3.
Abutting against each other. As a result, the intermediate pressure turbine disk 12 may be damaged, or the intermediate pressure turbine disk 12 may be damaged.
The end portion of the pin 8 is broken by friction with the pin 8
The debris of No. 1 may flow into the blade row of medium pressure and damage the blade row.
【０００６】本発明は、このような従来技術の課題を解
決するためになされたもので、ピンが抜け出してディス
クや翼列を損傷することを確実に防止できるようにした
ダミー環ピン抜止め構造を提供することを目的とする。The present invention has been made in order to solve the problems of the prior art, and a dummy ring pin retaining structure for surely preventing a pin from coming out and damaging a disk or a blade row. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明は、ダミー環に嵌め込まれたシールリング
と、該ダミー環の水平継手面付近に設けた穴に挿入配置
されたピンとを備えた蒸気タービンにおいて、上記ダミ
ー環の水平継手面に凹部を設けると共に、該凹部にピン
の端部に対接するストッパを取り付けたものである。In order to solve the above problems, the present invention provides a seal ring fitted in a dummy ring, and a pin inserted into a hole provided near the horizontal joint surface of the dummy ring. In the steam turbine provided with, a recess is provided on the horizontal joint surface of the dummy ring, and a stopper that is in contact with the end of the pin is attached to the recess.
【０００８】[0008]
【作用】このようなダミー環ピン抜止め構造によれば、
ピンの抜止めをピンと別体のストッパによって行ってい
るので、ピンの振動によって抜止めが緩むことがない。
また、該ストッパは凹部内に包み込まれているので、仮
に該ストッパが外れても、ダミー環の外へ飛び出すよう
なことはない。According to such a dummy ring pin retaining structure,
Since the stopper of the pin is kept separate from the pin, the stopper does not loosen due to the vibration of the pin.
Further, since the stopper is wrapped in the recess, even if the stopper comes off, it will not jump out of the dummy ring.
【０００９】[0009]
【実施例】以下、図１〜図３を参照して本発明の一実施
例について詳細に説明する。図１は本実施例に係るダミ
ー環ピン抜止め構造を示す断面図、図２は図１のＩＩ−
ＩＩ線断面図、図３は同ダミー環ピン抜止め構造の要部
の斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a sectional view showing a dummy ring pin retaining structure according to the present embodiment, and FIG. 2 is II- of FIG.
FIG. 3 is a sectional view taken along line II, and FIG. 3 is a perspective view of a main part of the dummy ring pin retaining structure.
【００１０】これらの図において、蒸気タービン内部の
高圧部と中圧部との間を仕切る高圧ダミー環２１には、
複数のシールリング２２が嵌め込まれており、該シール
リング２２に取り付けられている多数のシールフィン２
３とロータ（図示せず）との間でラビリンスを構成して
いる。また、高圧ダミー環２１の水平継手面２４の近傍
には穴２５が高圧ダミー環２１の端面２６からロータの
長手方向に沿って穿設されていると共に、該穴２５には
抜止め用のピン２７が挿入配置されている。そして、該
穴２５の端部には蒸気漏洩防止用のプラグ２８が嵌め込
まれており、穴２５の端部を閉塞した構造となってい
る。In these drawings, the high pressure dummy ring 21 for partitioning the high pressure portion and the intermediate pressure portion inside the steam turbine is
A plurality of seal rings 22 are fitted and a large number of seal fins 2 attached to the seal rings 22.
3 and a rotor (not shown) form a labyrinth. Further, a hole 25 is formed in the vicinity of the horizontal joint surface 24 of the high-voltage dummy ring 21 from the end surface 26 of the high-pressure dummy ring 21 along the longitudinal direction of the rotor, and the hole 25 has a retaining pin. 27 is inserted and arranged. A plug 28 for preventing vapor leakage is fitted into the end of the hole 25, and the end of the hole 25 is closed.
【００１１】また、上記高圧ダミー環２１の水平継手面
２４には、該水平継手面２４を削り込むことによって形
成された凹部２９が設けられており、該凹部２９には上
記ピン２７の端部に対接するストッパ３０がボルト３１
によって取り付けられている。すなわち、本実施例にお
いては、ピン２７は従来より短かめに作製されており、
該ピン２７の端部をピン２７と別体のストッパ３０によ
って押さえるよう構成している。また、高圧ダミー環２
１の上下半部を締め付けるとストッパ３０は凹部２９の
中に包み込まれるので、外部に出るようなことはない。Further, the horizontal joint surface 24 of the high-pressure dummy ring 21 is provided with a recess 29 formed by cutting the horizontal joint surface 24, and the recess 29 has an end portion of the pin 27. The stopper 30 facing the
Installed by. That is, in this embodiment, the pin 27 is made shorter than the conventional one,
The end portion of the pin 27 is configured to be held by a stopper 30 that is separate from the pin 27. Also, the high pressure dummy ring 2
When the upper and lower halves of 1 are tightened, the stopper 30 is wrapped in the recess 29 so that it does not come out.
【００１２】[0012]
【発明の効果】以上述べたように、本発明に係るダミー
環ピン抜止め構造によれば、ダミー環の水平継手面に凹
部を設けると共に、該凹部にピンの端部に対接するスト
ッパを取り付けており、ピンの抜止めを該ピンと別体の
ストッパによって行う構成としたので、ピンの振動によ
って抜止めが緩むようなことがない。また、ストッパが
凹部の中に包み込まれる構造となっているので、仮にス
トッパが外れたとしても、ダミー環の外へ飛び出すこと
がない。As described above, according to the dummy ring pin retaining structure according to the present invention, the recess is provided in the horizontal joint surface of the dummy ring, and the stopper which is in contact with the end of the pin is attached to the recess. Since the pin is prevented from coming off by a stopper that is separate from the pin, vibration does not cause the pin to loosen. Further, since the stopper is structured so as to be wrapped in the concave portion, even if the stopper comes off, it will not jump out of the dummy ring.
【００１３】したがって、本発明によれば、ピンが抜け
出してディスクや翼列を損傷することが確実に防止さ
れ、蒸気タービンの信頼性を高く維持することができる
という優れた効果を奏する。Therefore, according to the present invention, it is possible to reliably prevent the pins from coming off and damaging the disks and the blade rows, and it is possible to maintain a high reliability of the steam turbine.
【図１】本発明の一実施例に係るダミー環ピン抜止め構
造を示す断面図である。FIG. 1 is a cross-sectional view showing a dummy ring pin retaining structure according to an embodiment of the present invention.
【図２】図１のＩＩ−ＩＩ線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】同ダミー環ピン抜止め構造の要部の斜視図であ
る。FIG. 3 is a perspective view of a main part of the dummy ring pin retaining structure.
【図４】従来の蒸気タービンの一例を示す断面図であ
る。FIG. 4 is a sectional view showing an example of a conventional steam turbine.
【図５】従来の蒸気タービンの一部拡大断面図である。FIG. 5 is a partially enlarged sectional view of a conventional steam turbine.
【図６】図５のＶＩ部の拡大断面図である。6 is an enlarged cross-sectional view of a VI portion of FIG.
【図７】図６のＶＩＩ−ＶＩＩ線断面図である。7 is a sectional view taken along line VII-VII in FIG.
２１ 高圧ダミー環 ２２ シールリング ２３ シールフィン ２４ 水平継手面 ２５ 穴 ２６ 端面 ２７ ピン ２８ プラグ ２９ 凹部 ３０ ストッパ ３１ ボルト 21 High-pressure dummy ring 22 Seal ring 23 Seal fin 24 Horizontal joint surface 25 Hole 26 End surface 27 Pin 28 Plug 29 Recess 30 Stopper 31 Bolt
Claims (1)
該ダミー環の水平継手面付近に設けた穴に挿入配置され
たピンとを備えた蒸気タービンにおいて、上記ダミー環
の水平継手面に凹部を設けると共に、該凹部にピンの端
部に対接するストッパを取り付けたことを特徴とするダ
ミー環ピン抜止め構造。1. A seal ring fitted in a dummy ring,
In a steam turbine provided with a pin inserted into a hole provided in the vicinity of a horizontal joint surface of the dummy ring, a recess is provided in the horizontal joint surface of the dummy ring, and a stopper that is in contact with the end of the pin is provided in the recess. Dummy ring pin retaining structure characterized by being attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31386891A JPH05125902A (en) | 1991-10-31 | 1991-10-31 | Falling out preventing structure for dummy ring pin. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31386891A JPH05125902A (en) | 1991-10-31 | 1991-10-31 | Falling out preventing structure for dummy ring pin. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05125902A true JPH05125902A (en) | 1993-05-21 |
Family
ID=18046474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31386891A Withdrawn JPH05125902A (en) | 1991-10-31 | 1991-10-31 | Falling out preventing structure for dummy ring pin. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05125902A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109275A (en) * | 2012-12-04 | 2014-06-12 | General Electric Co <Ge> | Turbomachine diaphragm ring with packing retainment apparatus |
| JP2019108907A (en) * | 2017-12-15 | 2019-07-04 | 株式会社荏原製作所 | Non-contact annular seal, centrifugal pump, impeller ring, and casing ring |
-
1991
- 1991-10-31 JP JP31386891A patent/JPH05125902A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109275A (en) * | 2012-12-04 | 2014-06-12 | General Electric Co <Ge> | Turbomachine diaphragm ring with packing retainment apparatus |
| US9382813B2 (en) * | 2012-12-04 | 2016-07-05 | General Electric Company | Turbomachine diaphragm ring with packing retainment apparatus |
| JP2019108907A (en) * | 2017-12-15 | 2019-07-04 | 株式会社荏原製作所 | Non-contact annular seal, centrifugal pump, impeller ring, and casing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990107 |