JPS58185903A - Steam turbine casing - Google Patents
Steam turbine casingInfo
- Publication number
- JPS58185903A JPS58185903A JP6740582A JP6740582A JPS58185903A JP S58185903 A JPS58185903 A JP S58185903A JP 6740582 A JP6740582 A JP 6740582A JP 6740582 A JP6740582 A JP 6740582A JP S58185903 A JPS58185903 A JP S58185903A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- pressure
- casing
- seal liner
- partition wall
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は二重車室構造蒸気タービンに係わり、特に内部
車室と外部車室の嵌合部を備えた蒸気室仕切壁における
嵌合部が東南分解組立時の嵌合部摩耗金防＋ｈＬ、かつ
運転中嵌合部のシール効果を高める機能を備えた、蒸気
タービン車室に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam turbine with a double casing structure, and in particular, the fitting part in a steam chamber partition wall having a fitting part between an inner casing and an outer casing is a double casing structure that is difficult to fit during southeast disassembly and assembly. This invention relates to a steam turbine casing that has joint wear resistance +hL and a function that enhances the sealing effect of the joint during operation.
第１図は本発明の対象となる蒸気タービンの一例で、再
熱式蒸気タービン高中圧部組立断面図である。また第２
図は第１図のＡ部詳細で従来技術による内部車室と外部
車室の嵌合仕切壁構造図である。第１図において、高中
圧タービンは複数の段落を有するロータ１と複数段落の
ノズルダイヤフラム１０、ダイヤフラムを支持しかつ蒸
気室を形成するだめの高圧内部東学２、中圧内部車室１
４とこれら内部車室を支持しかつ蒸気を外部から導入ま
たは外部へ排出するだめの連結室を形成するだめの高中
圧外部車室３によって構成されている。高圧排気室１１
は高圧内部東外周の一部と高中圧外部車室の内壁および
該内部車室、外部車室とそれぞれ一体で構成されかつ相
互の分解可能ならしめるための嵌合部を有する高圧仕切
壁１２の高圧后段落側面によって形成されている。また
再熱蒸気室７は高圧内部車室ならびに中圧内部車室１４
の外周の一部と高中圧外車室の中央部内壁および高圧仕
切壁の高圧前段路側、さらに中圧内部車室と高中圧外車
室の相対部に核内・外部車室とそれぞれ一体で構成され
かつ相豆の分解可能な□らしめるための嵌合部を有する
中圧仕切壁２０の中圧前段落側面によって形成されてい
る。ボイラ（図示せず）からの主蒸気５は蒸気加減弁４
を介して高圧初段１７に入り、高圧タービン１５の後段
側へ順次仕事をし、高圧最終段８を出だ蒸気は高圧排気
９となって高圧排気室１１に流入する。FIG. 1 shows an example of a steam turbine to which the present invention is applied, and is an assembled sectional view of a high and intermediate pressure section of a reheat steam turbine. Also the second
The figure is a detailed view of part A in FIG. 1 and is a structural diagram of a fitting partition wall between an internal compartment and an external compartment according to the prior art. In FIG. 1, a high- and intermediate-pressure turbine includes a rotor 1 having multiple stages, a nozzle diaphragm 10 having multiple stages, a high-pressure internal Togaku 2 that supports the diaphragm and forms a steam chamber, and an intermediate-pressure internal casing 1.
4 and a high-medium pressure external chamber 3 that supports these internal chambers and forms a connecting chamber for introducing or discharging steam from the outside. High pressure exhaust chamber 11
A high-pressure partition wall 12 is constructed integrally with a part of the east outer periphery of the high-pressure interior, the inner wall of the high-medium pressure external compartment, and the internal compartment and the external compartment, respectively, and has a fitting part to enable mutual disassembly. The high pressure is formed by the rear stage side. In addition, the reheat steam chamber 7 includes a high-pressure internal casing and a medium-pressure internal casing 14.
A part of the outer periphery of the casing, the central inner wall of the high-medium pressure outer casing, the road side of the high-pressure front stage of the high-pressure partition wall, and the opposing parts of the medium-pressure inner casing and the high-medium-pressure outer casing are integrated with the core inner and outer casings, respectively. It is also formed by the side surface of the intermediate pressure front stage of the intermediate pressure partition wall 20, which has a fitting part to make it removable. Main steam 5 from a boiler (not shown) is supplied to a steam control valve 4.
The steam enters the high-pressure first stage 17 via the high-pressure first stage 17 and sequentially works on the downstream side of the high-pressure turbine 15, and the steam leaving the high-pressure final stage 8 becomes high-pressure exhaust 9 and flows into the high-pressure exhaust chamber 11.
高圧排気蒸気は一旦排気室に接続されている蒸気管（図
示せず）によってボイラーの再熱器（図示せず）に導び
かれ加熱昇温されたあと再び再熱蒸気６となって蒸気タ
ービンに雑犬される。再熱蒸気６け高中圧外部車室に連
結された再熱蒸気管１９により再熱蒸気室７へ導入され
、中圧初段１８へ流入し、中圧タービン１６の后段落へ
と仕事をしながら流れる。一般に高圧排気蒸気を再熱器
へ流し再びタービン再熱蒸気室に戻す迄の圧力損失は８
〜１０係発生することは周知である。この様なタービン
においては、高圧排気室１１と再熱蒸気室７との間に８
〜１０％の圧力差が生じ、圧力値にして約４ｋｇ々♂前
后再熱蒸気室の圧力が排気室のそれより低くなる。従来
技術においては両市室間を区分する高圧仕切壁１２の構
造は第２図に示す如く高圧内部車室の外囲部と高中圧外
部車室の内周部にそれぞれ該単室と一体で構成した仕切
壁を設け、円卓室側をメス、外車室側をメス（−または
その逆）とする嵌合構造としである。The high-pressure exhaust steam is once led to the reheater (not shown) of the boiler through a steam pipe (not shown) connected to the exhaust chamber, where it is heated and heated, and then becomes reheated steam 6 again to generate steam into the steam turbine. Become a mutt. Reheating steam is introduced into the reheating steam chamber 7 through a reheating steam pipe 19 connected to a high-medium pressure external casing, flows into the intermediate-pressure first stage 18, and flows to the rear stage of the intermediate-pressure turbine 16 while performing work. flows. Generally, the pressure loss between high-pressure exhaust steam flowing to the reheater and returning to the turbine reheating steam chamber is 8.
It is well known that 10 to 10 cases occur. In such a turbine, there is an air gap between the high pressure exhaust chamber 11 and the reheat steam chamber 7.
A pressure difference of ~10% occurs, and the pressure in the reheat steam chamber is lower than that in the exhaust chamber by about 4 kg in pressure value. In the prior art, the structure of the high-pressure partition wall 12 that separates the two compartments is constructed integrally with the single compartment at the outer circumference of the high-pressure internal compartment and the inner peripheral part of the high-medium pressure external compartment, respectively, as shown in FIG. A fitting structure is provided in which a female is provided on the side of the round table room and a female is provided on the side of the outer compartment (or vice versa).
また両車室間の分解組立を可能ならしめるために嵌合部
にギャップｇを設けである。運転中は両車室間の圧力差
により内部屯室側仕切壁が再熱蒸気室側へ押付けられａ
面がタッチして再熱蒸気室側への蒸気漏洩を防ぐ役目を
はたす。しかしながら、この様な従来技術においては、
運転中高温にさらされるだめ、嵌合部金属面は酸化固着
することがあり、定期点検等で単室を分解する際ａ面の
かじり現象が発生することはめずらしくない、、壕だ、
分解組立のくり返しによ１７ａ面に不均一な摩耗が発生
することも多い。この様な接合面のかじりや不均一な摩
耗がおきると、運転中ａ面が密着せず、局部的に間隙が
出来ため、高圧排気室側から再熱蒸気室側へこの間隙を
通って蒸気が漏洩する。漏洩蒸気は再熱器へ行かず低温
状態のまま直接再熱蒸気室へ漏れ込むことになるので、
再熱蒸気室温度を低下させ、中圧タービン以降の効率を
低下させる欠点がある。In addition, a gap g is provided at the fitting portion to enable disassembly and assembly between the two vehicle compartments. During operation, due to the pressure difference between the two compartments, the internal compartment wall is pushed toward the reheat steam compartment a.
The surface touches the surface and serves to prevent steam leakage to the reheating steam room side. However, in such conventional technology,
Due to exposure to high temperatures during operation, the metal surfaces of the mating parts may become oxidized and solidified, and it is not uncommon for galling on the A side to occur when disassembling a single chamber for periodic inspections, etc.
Uneven wear often occurs on the surface 17a due to repeated disassembly and assembly. If such galling or uneven wear occurs on the joint surface, the a-side will not come into close contact during operation, and a gap will be formed locally, allowing steam to flow from the high-pressure exhaust chamber side to the reheat steam chamber side through this gap. leaks. The leaked steam does not go to the reheater and leaks directly into the reheating steam room in a low temperature state.
It has the disadvantage of lowering the reheat steam chamber temperature and lowering the efficiency of the intermediate pressure turbine and subsequent parts.
本発明の目的は、タービン運転中に車室仕切壁嵌合部か
らの蒸気漏洩を防止した嵌合部シールを有する蒸気ター
ビン車室を提供することにある。An object of the present invention is to provide a steam turbine casing having a fitting seal that prevents steam leakage from the fitting part of the casing partition wall during turbine operation.
次に本発明の一実施例である蒸気タービン東南の部分図
を第３図および第４図により説明する。Next, a partial view of the southeast part of a steam turbine according to an embodiment of the present invention will be explained with reference to FIGS. 3 and 4. FIG.
第３図は第１図のＡ部詳細で本発明による高圧仕切壁嵌
合部構造図、また第４図は第３図のＢ−Ｂ断面図である
。高圧仕切壁１２の嵌合部において、高圧内部車室側溝
２２０反タッチ面に溝２１を設け、この溝に本発明によ
るシールライナー１３をボルト（図示せず）で締付固定
する。シールライナーは円周方向に数等分に分別し、各
セグメント間に運転中の熱膨張差を吸収するだめの間隙
ｍを設けである。高圧内部車室、高中圧外部車室の旧料
には一般に高温用低合金鋼が用いられており、フェライ
ト系組織の材料が開用される。これに対しシールライナ
ーの材料には単室材よりも線膨張係数の大きい材料、例
えばオーステナイト系ステンレス鋼を［吏用する。また
シールライナーの嵌合溝開口側の面Ｃには１個または複
数個の溝ｄをライナーの円周にそって設けである。さら
に、シールライナーの面Ｃと相対する高中圧外部車室側
仕切壁面すとの間には分解組立を容易にし、かつ運転中
の単室とシールライナーの熱膨張差全吸収するだめの間
隙ｇ′を設ける。この様な本案によれば運転中車室側の
熱膨張量よりもシールライナーの熱膨張量が大きいので
、その差の分だけ間隙ｇ′がせまくなる。その量が間隙
ｇ′と等しくなる様にシールライナーの厚さを選定して
おけば、運転中は面Ｃと面すが密層した状態となり、タ
ッチ面ａがかじり損傷や摩耗により当りが不均一となり
間隙が生じて蒸気が漏洩するような状況下にあつても２
面側から漏れて来た蒸気を阻止することが出来ル。−ま
たシールライナーに溝ｄを設けることにより面Ｃと面す
の接触面積が少くなり、密差時の面圧を高める効果があ
るのみならず、ラビリンス効果による蒸気漏洩防止効果
も期待することが出来る。FIG. 3 is a detailed view of the section A in FIG. 1, showing the structure of the high-pressure partition wall fitting part according to the present invention, and FIG. 4 is a cross-sectional view taken along the line B--B in FIG. 3. At the fitting portion of the high-pressure partition wall 12, a groove 21 is provided on the non-touch surface of the high-pressure internal compartment side groove 220, and the seal liner 13 according to the present invention is tightened and fixed in this groove with a bolt (not shown). The seal liner is divided into several equal parts in the circumferential direction, and a gap m is provided between each segment to absorb the difference in thermal expansion during operation. High-temperature low-alloy steel is generally used as the material for the high-pressure internal casing and the high-medium pressure external casing, and materials with ferritic structures are now being used. On the other hand, the seal liner is made of a material having a higher coefficient of linear expansion than the single-chamber material, such as austenitic stainless steel. Further, one or more grooves d are provided along the circumference of the liner on the surface C of the seal liner on the fitting groove opening side. Furthermore, there is a gap g between the surface C of the seal liner and the opposing high-medium pressure external compartment side partition wall surface to facilitate disassembly and assembly and to absorb the entire difference in thermal expansion between the single chamber and the seal liner during operation. ′ is provided. According to the present invention, since the amount of thermal expansion of the seal liner is larger than the amount of thermal expansion on the side of the passenger compartment during operation, the gap g' becomes narrower by the difference. If the thickness of the seal liner is selected so that the amount is equal to the gap g', the seal liner will face C during operation, but will be in a dense layered state, and touch surface A will be damaged due to galling or wear. 2 Even under conditions where the steam becomes uniform and gaps occur and the steam leaks.
It is possible to prevent steam from leaking from the surface side. - Also, by providing the groove d in the seal liner, the contact area between the surface C and the facing surface is reduced, which not only has the effect of increasing the surface pressure at the time of a difference in density, but also can be expected to prevent steam leakage due to the labyrinth effect. I can do it.
本発明によれば、タービン運転中に単室仕切壁嵌合部か
らの蒸気漏洩を確実に防止しうる嵌合部シールを備えた
蒸気タービン車室が実現できるという効果を奏する。According to the present invention, it is possible to realize a steam turbine casing equipped with a fitting part seal that can reliably prevent steam leakage from the single-chamber partition wall fitting part during turbine operation.
第１図は本発明のメを象となる再熱式蒸気タービンの高
中圧部所面図、第２図は第１図のＡ部詳細で従来技術に
よる内部車室と外部車室の嵌合仕切壁構造図、第３図は
第１図のＡ部詳細で本発明の一実施例である蒸気タービ
ンの内部車室と外部車室の嵌合仕切壁構造図、第４図は
第３図のＢ−Ｂ断面図である。Fig. 1 is a top view of the high and intermediate pressure part of a reheat steam turbine embodying the present invention, and Fig. 2 is a detailed view of part A in Fig. 1, showing the fitting of the internal casing and external casing according to the prior art. 3 is a detailed diagram of part A in FIG. 1, and is a structural diagram of a partition wall where the internal and external casings of a steam turbine that is an embodiment of the present invention fit together; FIG. 4 is a diagram of the partition wall shown in FIG. It is a BB sectional view of.
Claims (1)
成され、かつ内部車室および外部と一体に設けられ互に
分解可能ならしめる嵌合部を有する仕切壁によって形成
された２つ以上の蒸気室を有する蒸気タービン東南にお
いて、隣接する蒸気室の内部圧力が異なり、該仕切壁が
両蒸気室間の蒸気漏洩防止膜を果たしている仕切壁嵌合
部に、前記内・外車室とは線膨張系数の異なる材質から
なるシールライナーを設けて、分解組立時の嵌合部摩耗
を防止すると共に、運転中嵌合部のシール効果を高める
ことを特徴とする蒸気タービン車室。 ２、特許請求の範囲第１項において、シールライナーの
蒸気シール面に凹凸溝を設けたことを特徴とする蒸気タ
ービン車室。[Claims] 1. It is formed of an internal compartment and an external compartment surrounding the internal compartment, and has a fitting part that is provided integrally with the internal compartment and the outside and can be disassembled from each other. A partition wall fitting part in the southeast of a steam turbine having two or more steam chambers formed by partition walls, where adjacent steam chambers have different internal pressures and the partition wall acts as a steam leak prevention membrane between both steam chambers. A seal liner made of a material having a linear expansion coefficient different from that of the inner and outer casings is provided to prevent wear of the fitting part during disassembly and assembly, and to enhance the sealing effect of the fitting part during operation. Steam turbine casing. 2. A steam turbine casing according to claim 1, characterized in that an uneven groove is provided on the steam sealing surface of the seal liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6740582A JPS58185903A (en) | 1982-04-23 | 1982-04-23 | Steam turbine casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6740582A JPS58185903A (en) | 1982-04-23 | 1982-04-23 | Steam turbine casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58185903A true JPS58185903A (en) | 1983-10-29 |
Family
ID=13343993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6740582A Pending JPS58185903A (en) | 1982-04-23 | 1982-04-23 | Steam turbine casing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58185903A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997012125A3 (en) * | 1995-09-29 | 1997-06-19 | Siemens Ag | Sealing element for sealing a gap and gas turbine facility |
| JP2008075651A (en) * | 2006-09-19 | 2008-04-03 | General Electric Co <Ge> | System and method for positioning and sealing turbine shell assembly |
| US7497658B2 (en) * | 2005-11-11 | 2009-03-03 | General Electric Company | Stacked reaction steam turbine stator assembly |
| WO2012116943A1 (en) | 2011-02-28 | 2012-09-07 | Alstom Technology Ltd | Turbine comprising a sealing device between the stator blade carrier and the housing |
| EP2538031A1 (en) * | 2011-06-22 | 2012-12-26 | Siemens Aktiengesellschaft | Rotor with sealing element for a stationary gas turbine |
| CN106089334A (en) * | 2016-08-12 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of HP-IP combined casing unit with interior outer shell interlayer sealing member |
| KR20240055849A (en) | 2021-12-15 | 2024-04-29 | 미츠비시 파워 가부시키가이샤 | steam turbine |
-
1982
- 1982-04-23 JP JP6740582A patent/JPS58185903A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997012125A3 (en) * | 1995-09-29 | 1997-06-19 | Siemens Ag | Sealing element for sealing a gap and gas turbine facility |
| US7497658B2 (en) * | 2005-11-11 | 2009-03-03 | General Electric Company | Stacked reaction steam turbine stator assembly |
| JP2008075651A (en) * | 2006-09-19 | 2008-04-03 | General Electric Co <Ge> | System and method for positioning and sealing turbine shell assembly |
| WO2012116943A1 (en) | 2011-02-28 | 2012-09-07 | Alstom Technology Ltd | Turbine comprising a sealing device between the stator blade carrier and the housing |
| US9422822B2 (en) | 2011-02-28 | 2016-08-23 | Alstom Technology Ltd | Turbine comprising a sealing device between the stator blade carrier and the housing |
| EP2538031A1 (en) * | 2011-06-22 | 2012-12-26 | Siemens Aktiengesellschaft | Rotor with sealing element for a stationary gas turbine |
| WO2012175274A1 (en) * | 2011-06-22 | 2012-12-27 | Siemens Aktiengesellschaft | Rotor with sealing element for a stationary gas turbine |
| CN106089334A (en) * | 2016-08-12 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of HP-IP combined casing unit with interior outer shell interlayer sealing member |
| CN106089334B (en) * | 2016-08-12 | 2018-09-25 | 浙江浙能技术研究院有限公司 | The HP-IP combined casing unit of outer shell interlayer sealing element in a kind of band |
| KR20240055849A (en) | 2021-12-15 | 2024-04-29 | 미츠비시 파워 가부시키가이샤 | steam turbine |
| DE112022003962T5 (en) | 2021-12-15 | 2024-05-29 | Mitsubishi Heavy Industries, Ltd. | STEAM TURBINE |
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