JPH0777004A - Assembled rotor for steam turbine - Google Patents
Assembled rotor for steam turbineInfo
- Publication number
- JPH0777004A JPH0777004A JP22191293A JP22191293A JPH0777004A JP H0777004 A JPH0777004 A JP H0777004A JP 22191293 A JP22191293 A JP 22191293A JP 22191293 A JP22191293 A JP 22191293A JP H0777004 A JPH0777004 A JP H0777004A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- high temperature
- stress corrosion
- steam turbine
- steam inlet
- 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- Withdrawn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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として急速起動が要
求される蒸気タービンのロータ構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a rotor structure for a steam turbine which requires a quick start.
【０００２】[0002]
【従来の技術】図３は従来の 75,000kW 単車室火力発電
用蒸気タービンロータの一例を示す側面図である。ロー
タは図の左側から軸継手（１），スラスト軸受（２），
ジャーナル軸受（３），グランド（４），複数個のダン
ミー（５），タービンディスク（６），グランド
（７），ジャーナル軸受（８）および軸継手（９）によ
って構成され、耐熱鋼鍛造素材から一体に削り出された
構造になっている。なお車室は高圧車室と低圧車室に分
割されている。2. Description of the Related Art FIG. 3 is a side view showing an example of a conventional 75,000kW single-chamber thermal power generation steam turbine rotor. From the left side of the figure, the rotor is the shaft coupling (1), thrust bearing (2),
Composed of journal bearing (3), gland (4), a plurality of dammy (5), turbine disk (6), gland (7), journal bearing (8) and shaft coupling (9), made of heat-resistant steel forging material It has a structure that is carved out in one piece. The passenger compartment is divided into a high-pressure passenger compartment and a low-pressure passenger compartment.
【０００３】[0003]
１） 火力発電用蒸気タービンは、給電指令に基づいて
ＤＳＳ（Daily Startand Stop）運用やＷＳＳ (Weekly
Start and Stop)運用をする場合が多い。これは電力需
要のばらつきに対応するためである。起動頻度が多いと
起動時の消費蒸気量が増え、プラントの熱利用率が低下
する。このため起動時間の短かい急速起動蒸気タービン
が要求される。しかし急速に起動すると、蒸気温度の上
昇に伴ってロータに過渡的な熱応力が発生し、この熱応
力による低サイクル熱疲労損傷が懸念されるため、起動
時間の短縮には限界があった。1) Steam turbines for thermal power generation use DSS (Daily Start and Stop) operation and WSS (Weekly) based on the power supply command.
Start and Stop) is often used. This is to cope with variations in power demand. If the startup frequency is high, the amount of steam consumed at startup increases, and the heat utilization rate of the plant decreases. Therefore, a rapid start steam turbine having a short start time is required. However, when the engine is rapidly started, transient thermal stress is generated in the rotor as the steam temperature rises, and there is a concern of low cycle thermal fatigue damage due to this thermal stress, so there is a limit to the reduction of the starting time.
【０００４】２） ロータの高温部には上記熱疲労と高
温クリープが発生し、低温部には応力をうけた状態で腐
食が促進される、いわゆる応力腐食によって、応力腐食
割れ（ＳＣＣ：Stress Corrosion Crack）が発生する。
この高温クリープと低温ＳＣＣに対して、同時に対応で
きる材料は無いので、ロータを一体構造とすれば、いず
れかのトラブルが発生する恐れがあった。2) Stress corrosion cracking (SCC) occurs due to so-called stress corrosion, in which the above-mentioned thermal fatigue and high temperature creep occur in the high temperature portion of the rotor, and corrosion is promoted in the low temperature portion under stress. Crack) occurs.
Since there is no material that can simultaneously cope with the high temperature creep and the low temperature SCC, if the rotor has an integral structure, there is a possibility that any trouble may occur.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記従来の課
題を解決するために、ロータの蒸気入口部を中空に形成
し、その中空部分で上記ロータを軸方向に分割するとと
もに、上記分割されたロータをボルト結合したことを特
徴とする蒸気タービンの組立ロータ；ならびに、ロータ
の高温部を耐熱鋼または耐熱合金，低温部を耐応力腐食
割れ材でそれぞれ製造し、それら高温部ロータと低温部
ロータをボルト結合したことを特徴とする蒸気タービン
の組立ロータを提案するものである。In order to solve the above-mentioned conventional problems, the present invention forms a steam inlet portion of a rotor in a hollow manner and divides the rotor axially in the hollow portion, and further Rotor of a steam turbine, characterized by bolting the formed rotor; and a high temperature part of the rotor manufactured by heat resistant steel or heat resistant alloy, and a low temperature part by stress corrosion cracking resistant material The present invention proposes an assembled rotor for a steam turbine, characterized in that the partial rotors are bolted together.
【０００６】[0006]
１） 前記第１の解決手段においては、タービンロータ
の蒸気入口部を中空にしたので、ロータ最高温部の熱容
量が減少し、起動時のロータ熱応力が低下する。また、
ロータの半径方向の肉厚が薄いので、温度の不均一が軽
減され、その点でも熱応力が低下する。1) In the first solving means, since the steam inlet portion of the turbine rotor is hollow, the heat capacity of the rotor highest temperature portion is reduced, and the rotor thermal stress at the time of startup is reduced. Also,
Since the thickness of the rotor in the radial direction is thin, the non-uniformity of temperature is reduced, and the thermal stress is reduced in that respect as well.
【０００７】２） 前記第２の解決手段においては、耐
熱鋼または耐熱合金製の高温部ロータと耐ＳＣＣ材製の
低温部ロータとをボルト結合した組立ロータとなってい
るので、熱疲労と高温クリープおよび応力腐食割れのい
ずれにも優れたタービンロータが得られる。2) In the second means for solving the problems, since the rotor having a high temperature portion made of heat-resistant steel or a heat-resistant alloy and the rotor having a low temperature portion made of SCC material are bolted to each other, they are assembled rotors, so that thermal fatigue and high temperature A turbine rotor excellent in both creep and stress corrosion cracking can be obtained.
【０００８】[0008]
【実施例】図１は本発明の第１実施例を示す縦断面図で
ある。この図において、タービンロータの蒸気入口部Ａ
は中空に形成され、ダンミー部Ｂ以前のロータとは円周
方向に配設された植込リーマボルト（１１）によって結
合されている。1 is a vertical sectional view showing a first embodiment of the present invention. In this figure, the steam inlet portion A of the turbine rotor is shown.
Is hollow and is connected to the rotor in front of the dammy portion B by a reamer bolt (11) which is circumferentially arranged.
【０００９】本実施例においては、タービンロータの蒸
気入口部Ａが中空になっているので、ロータ最高温部の
熱容量が小さく、したがって起動時のロータ熱応力も低
い。またロータの半径方向の肉厚が薄いので、内外の温
度差が小さく、その点でも熱応力が低下する。In this embodiment, since the steam inlet portion A of the turbine rotor is hollow, the heat capacity of the highest temperature portion of the rotor is small, and therefore the rotor thermal stress at startup is also low. Further, since the rotor is thin in the radial direction, the temperature difference between the inside and the outside is small, and the thermal stress is reduced in that respect as well.
【００１０】なお、図１において、ロータの分割部分は
ダンミー部で分割しているが、中空部をダンミー部まで
伸ばしてグランド部で分割しボルト結合しても良い。ま
た、その他の部分で分割しても良い。In FIG. 1, the divided portion of the rotor is divided by the dummy portion, but the hollow portion may be extended to the dummy portion and divided by the ground portion for bolt connection. Also, it may be divided at other portions.
【００１１】次に図２は本発明の第２実施例を示す縦断
面図である。この図において、高温部ロータ（２１）と
低温部ロータ（２２）は、円周方向に配設されたリーマ
ボルト（２３）によって結合されている。低温部ロータ
は３個のタービンディスクとシャフトによって構成され
ている。高温部ロータ（２１）は耐熱鋼または耐熱合金
によって製造されており、低温部ロータ（２２）は耐応
力腐食割れ（耐ＳＣＣ）材で製造されている。Next, FIG. 2 is a vertical sectional view showing a second embodiment of the present invention. In this figure, the high temperature part rotor (21) and the low temperature part rotor (22) are connected by a reamer bolt (23) arranged in the circumferential direction. The low temperature rotor is composed of three turbine disks and a shaft. The high temperature rotor (21) is made of heat resistant steel or heat resistant alloy, and the low temperature rotor (22) is made of stress corrosion cracking resistant (SCC resistant) material.
【００１２】このように本実施例のタービンロータは、
耐熱鋼または耐熱合金製の高温部ロータと耐ＳＣＣ材製
の低温部ロータとをボルト結合した組立ロータなので、
熱疲労と高温クリープおよび応力腐食割れのいずれにも
優れた特性を具えている。In this way, the turbine rotor of this embodiment is
Since it is an assembled rotor in which a high temperature part rotor made of heat resistant steel or heat resistant alloy and a low temperature part rotor made of SCC resistant material are bolted together,
It has excellent properties for both thermal fatigue, high temperature creep and stress corrosion cracking.
【００１３】[0013]
【発明の効果】本発明によれば下記の効果が得られる。 １） 従来に比べて起動時間を大幅に短縮することがで
き、ＤＳＳ運転やＷＳＳ運転を行なう火力発電プラント
の熱利用率が向上する。According to the present invention, the following effects can be obtained. 1) The start-up time can be significantly shortened compared to the conventional one, and the heat utilization rate of a thermal power plant that performs DSS operation or WSS operation is improved.
【００１４】２） タービンロータの熱疲労と高温クリ
ープ強度および耐応力腐食割れ特性の向上により、ロー
タの信頼性が増す。2) The reliability of the rotor is increased by improving the thermal fatigue, high temperature creep strength and stress corrosion cracking resistance of the turbine rotor.
【図１】図１は本発明の１実施例を示す縦断面図であ
る。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】図２は本発明の第２実施例を示す縦断面図であ
る。FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.
【図３】図３は従来の蒸気タービンロータの一例を示す
側面図である。FIG. 3 is a side view showing an example of a conventional steam turbine rotor.
（１），（９） 軸継手 （２） スラスト軸受 （３），（８） ジャーナル軸受 （４），（７） グランド （５） ダンミー （６） タービンディスク （１１） 植込リーマボルト （２１） 高温部ロータ （２２） 低温部ロータ （２３） リーマボルト （Ａ） 蒸気入口部 （Ｂ） ダンミー部 (1), (9) Shaft coupling (2) Thrust bearing (3), (8) Journal bearing (4), (7) Gland (5) Dammy (6) Turbine disk (11) Implanted reamer bolt (21) High temperature Section rotor (22) Low temperature section rotor (23) Reamer bolt (A) Steam inlet section (B) Dammy section
Claims (2)
の中空部分で上記ロータを軸方向に分割するとともに、
上記分割されたロータをボルト結合したことを特徴とす
る蒸気タービンの組立ロータ。1. The rotor has a steam inlet portion formed hollow, and the hollow portion divides the rotor axially, and
An assembled rotor for a steam turbine, characterized in that the divided rotors are bolted together.
金，低温部を耐応力腐食割れ材でそれぞれ製造し、それ
ら高温部ロータと低温部ロータをボルト結合したことを
特徴とする蒸気タービンの組立ロータ。2. An assembly of a steam turbine characterized in that a high temperature portion of a rotor is manufactured by heat-resistant steel or a heat-resistant alloy, a low temperature portion is manufactured by a stress corrosion cracking resistant material, and the high temperature portion rotor and the low temperature portion rotor are bolted together. Rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22191293A JPH0777004A (en) | 1993-09-07 | 1993-09-07 | Assembled rotor for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22191293A JPH0777004A (en) | 1993-09-07 | 1993-09-07 | Assembled rotor for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0777004A true JPH0777004A (en) | 1995-03-20 |
Family
ID=16774109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22191293A Withdrawn JPH0777004A (en) | 1993-09-07 | 1993-09-07 | Assembled rotor for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777004A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1785584A2 (en) * | 2005-11-11 | 2007-05-16 | General Electric Company | Stacked steam turbine rotor assembly |
| JP2009216094A (en) * | 2008-03-07 | 2009-09-24 | General Electric Co <Ge> | Steam turbine rotor and method of assembling the same |
| JP2015025459A (en) * | 2014-10-28 | 2015-02-05 | 三菱重工業株式会社 | Rotor of steam turbine |
| US9657574B2 (en) | 2011-03-30 | 2017-05-23 | Mitsubishi Heavy Industries, Ltd. | Rotor of rotary machine and rotary machine |
| CN109844265A (en) * | 2016-10-24 | 2019-06-04 | 英德科斯控股私人有限公司 | It is suitable for the multiatage axial flow turbine run under low vapor (steam) temperature |
-
1993
- 1993-09-07 JP JP22191293A patent/JPH0777004A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1785584A2 (en) * | 2005-11-11 | 2007-05-16 | General Electric Company | Stacked steam turbine rotor assembly |
| JP2007132352A (en) * | 2005-11-11 | 2007-05-31 | General Electric Co <Ge> | Rotor assembly for stacking type reactionary steam turbine |
| EP1785584A3 (en) * | 2005-11-11 | 2014-03-26 | General Electric Company | Stacked steam turbine rotor assembly |
| JP2009216094A (en) * | 2008-03-07 | 2009-09-24 | General Electric Co <Ge> | Steam turbine rotor and method of assembling the same |
| US9657574B2 (en) | 2011-03-30 | 2017-05-23 | Mitsubishi Heavy Industries, Ltd. | Rotor of rotary machine and rotary machine |
| JP2015025459A (en) * | 2014-10-28 | 2015-02-05 | 三菱重工業株式会社 | Rotor of steam turbine |
| CN109844265A (en) * | 2016-10-24 | 2019-06-04 | 英德科斯控股私人有限公司 | It is suitable for the multiatage axial flow turbine run under low vapor (steam) temperature |
| CN109844265B (en) * | 2016-10-24 | 2022-08-12 | 英德科斯控股私人有限公司 | Multistage axial flow turbine suitable for operation at low steam temperatures |
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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: 20001107 |