JPS5944481B2 - steam turbine rotor system - Google Patents
steam turbine rotor systemInfo
- Publication number
- JPS5944481B2 JPS5944481B2 JP16798780A JP16798780A JPS5944481B2 JP S5944481 B2 JPS5944481 B2 JP S5944481B2 JP 16798780 A JP16798780 A JP 16798780A JP 16798780 A JP16798780 A JP 16798780A JP S5944481 B2 JPS5944481 B2 JP S5944481B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- bearing
- steam turbine
- pressure rotor
- steel
- 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.)
- Expired
Links
Description
【発明の詳細な説明】
本発明は、たとえば蒸気タービン用高圧ロータと蒸気タ
ービン用中圧ロータの如く、同−軸心状に直結したロー
タ軸からなるロータ系に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor system comprising rotor shafts that are directly connected coaxially, such as a high pressure rotor for a steam turbine and an intermediate pressure rotor for a steam turbine.
再熱蒸気タービン技術の発達により、最近ではたとえば
蒸気条件２４６ｋｇ７ｃｖｔ−ｓ−５６６７５６６℃の
如く高温高圧蒸気タービンが実用されるので、高圧ロー
タにも中圧ロータにも、高温強度の大きい材料を使用し
なければならない。With the development of reheat steam turbine technology, high-temperature, high-pressure steam turbines have recently been put into practical use, with steam conditions of 246 kg, 7 cvt-s, and 5,667,566°C, so materials with high high-temperature strength are used for both the high-pressure rotor and the intermediate-pressure rotor. There must be.
これに適した材料として、オーステナイト合金系の強靭
鋼、たとえば１２Ｃｒ−Ｍｏ■ロータ材が賞月される。A suitable material for this purpose is austenitic alloy-based strong steel, such as 12Cr-Mo2 rotor material.
これを用いるとディスク冷却を行わなくても所要強度を
維持し得るので、ディスク冷却による熱損失（約０．２
％）を防止し得るという長所が有るが、その反面、この
材料は軸受面に摺り傷を生じ易いという短所が有を。By using this, the required strength can be maintained without disk cooling, so the heat loss due to disk cooling (approximately 0.2
%), but on the other hand, this material has the disadvantage of easily causing scratches on the bearing surface.
この短所をカバーするため、オーステナイト合金系強靭
鋼製ロータの軸受部に非オーステナイト系の鋼材で作っ
たスリーブを焼きばめすることが一般に行われる。To overcome this drawback, it is common practice to shrink-fit a sleeve made of non-austenitic steel material to the bearing portion of a rotor made of strong austenitic alloy steel.
上記のように摺り傷を生じにくい非オーステナイト系の
鋼材を焼きばめして摺動面を保護する方法は、ロータの
ラジアル方向軸受部には適用できるがスライド方向の軸
受部に適用することが困難である。As mentioned above, the method of shrink-fitting non-austenitic steel materials that do not easily cause scratches to protect the sliding surfaces can be applied to the radial bearing part of the rotor, but it is difficult to apply to the sliding direction bearing part. It is.
従来、たとえば蒸気条件２４６ ｋｙ／ｆｆｌ・ｇ−５
３８１５６６℃程度の蒸気タービン用のプライマリ軸に
おいては、中圧ロータにオーステナイト合金系強靭鋼を
用い、高圧ロータには非オーステナイト系の強靭鋼を用
いることによって前記の短所をカバーしている。Conventionally, for example, steam conditions 246 ky/ffl・g-5
In the primary shaft for a steam turbine having a temperature of about 381,566° C., the above-mentioned disadvantages are covered by using austenitic alloy-based strong steel for the intermediate pressure rotor and using non-austenitic strong steel for the high-pressure rotor.
第１図に従来のロータ系の構造の一例を示す。FIG. 1 shows an example of the structure of a conventional rotor system.
１は摺り傷を生じにくい非オーステナイト合金系のＩ
Ｃｒ −Ｍｏ −Ｖ鋼製の高圧ロータ、２は高温強度に
優れたオーステナイト合金系の１２ Ｃｒ −Ｍｏ −
Ｖ鋼製の中圧ロータである。1 is a non-austenitic alloy type I that does not easily cause scratches.
A high-pressure rotor made of Cr-Mo-V steel, 2 is an austenitic alloy-based 12Cr-Mo- with excellent high-temperature strength.
This is a medium pressure rotor made of V steel.
高圧ロータ１は摺損を生じにくい材質であるから直接的
に第１軸受３と第２軸受４とでラジアル方向の支承をし
ている。Since the high-pressure rotor 1 is made of a material that does not easily cause sliding damage, it is directly supported in the radial direction by the first bearing 3 and the second bearing 4.
しかし中圧ロータ２は摺損を生じ易い材質であるからス
リーブ状の焼ばめジャーナル５，５を固着してその外周
を第３軸受６、第４軸受７でラジアル方向の支承をして
いる。However, since the intermediate pressure rotor 2 is made of a material that easily causes sliding damage, the sleeve-shaped shrink-fit journals 5, 5 are fixed and the outer periphery is supported in the radial direction by the third bearing 6 and the fourth bearing 7. .
そして、高圧ロータ１と一体に作られた削り出しカップ
リング８と中圧ロータ２に固着された焼ばめカップリン
グ９とをボルト１０で締結して両ロータを直結している
。A machined coupling 8 made integrally with the high-pressure rotor 1 and a shrink-fit coupling 9 fixed to the medium-pressure rotor 2 are fastened with bolts 10 to directly connect both rotors.
そして、このロータ系のスラスト方向の位置ぎめのため
、高圧ロータ１に一対のフランジ状の推力受は部ＩＬ１
１を形成し、推力軸受１２をこれに対向せしめている。In order to position the rotor system in the thrust direction, a pair of flange-shaped thrust receivers are installed on the high pressure rotor 1 at part IL1.
1, and the thrust bearing 12 is opposed to this.
この場合、高圧ロータ１は摺損を生じにくい材料で作ら
れているので、適宜の潤滑を与えれば推力軸受１２と摺
触しても別設の問題を生じない。In this case, since the high-pressure rotor 1 is made of a material that does not easily cause sliding damage, if appropriate lubrication is provided, even if it comes into sliding contact with the thrust bearing 12, no separate problems will occur.
１３は発電機のロータで、その一端に削り出しカップリ
ング１４は中圧ロータ２に固着された焼ばめカップリン
グ１５との間にターニング用のリングギヤ１６を介装し
てポルト１７で締結されている。Reference numeral 13 denotes a rotor of the generator, and a coupling 14 machined at one end thereof is connected to a shrink-fit coupling 15 fixed to the medium pressure rotor 2 with a turning ring gear 16 interposed between the two and a port 17. ing.
１８．１８’はそれぞれ高圧ロータ１、中圧ロータ２に
設けられた動翼である。18 and 18' are rotor blades provided on the high pressure rotor 1 and the intermediate pressure rotor 2, respectively.
最近、タービン技術の進歩に伴って、主蒸気温度を５６
０℃以上の高温にすることが研究されており、高圧ロー
タにもオーステナイト合金系の強靭鋼を使用する必要に
迫られているが、高圧ロータ及び中圧ロータの両方をオ
ーステナイト合金系強靭鋼にしようとすると、推力受は
面における摺り傷発生の対策が最大の技術的ネックとな
る。Recently, with the advancement of turbine technology, the main steam temperature has been increased to 56%.
Research is underway to raise the temperature to temperatures above 0°C, and there is a need to use strong austenitic alloy steel for the high-pressure rotor. If this is attempted, the biggest technical bottleneck will be countermeasures against scratches on the thrust receiver's surface.
ラジアル方法の軸受面を保護するためには前述の従来方
法のごとくスリーブ状の焼ばめジャーナルを設ければ良
いが、この方法はスラスト方向の軸受面に適用できない
。In order to protect the bearing surface in the radial method, a sleeve-shaped shrink-fit journal may be provided as in the conventional method described above, but this method cannot be applied to the bearing surface in the thrust direction.
この為、従来、高圧ロータと中圧ロータとの両方をオー
ステナイト合金系強靭鋼で作ると、両ロータの接続部近
傍にスラスト軸受を設けることはできないものとされて
いた。For this reason, it has conventionally been thought that if both the high-pressure rotor and the intermediate-pressure rotor are made of strong austenitic alloy steel, it is not possible to provide a thrust bearing in the vicinity of the connection between the two rotors.
本発明は以上の事情に鑑みて為され、前掲の例のごとく
、同一軸線上に配設されたロータを直結してなる蒸気タ
ービン用のロータ系において、直結されるべき２本のロ
ータの双方を高温強度の大きいオーステナイト合金系強
靭鋼で作り、しかも両ロータの結合部付近に耐久性の大
きいスラスト軸受を設けた蒸気タービンロータ系を提供
しようとするものである。The present invention has been made in view of the above circumstances, and in a rotor system for a steam turbine in which rotors arranged on the same axis are directly connected, as in the above-mentioned example, both of the two rotors to be directly connected are The present invention aims to provide a steam turbine rotor system in which the rotor is made of strong austenitic alloy steel with high high-temperature strength, and a thrust bearing with high durability is provided near the joint between both rotors.
本発明は上記の目的を達成するため、オーステナイト合
金系強靭鋼で作られた２本のロータの間に非オーステナ
イト系の材料で作られた中間ロータを介装して、この中
間ロータに推力受は面を形成したことを特徴とする。In order to achieve the above object, the present invention has an intermediate rotor made of a non-austenitic material interposed between two rotors made of strong austenitic alloy steel, and this intermediate rotor receives thrust. is characterized by forming a surface.
次に、本発明の一実施例を第２図について説明する。Next, an embodiment of the present invention will be described with reference to FIG.
参考線ｘ−ｘ’よりも右方の部分、すなわち中圧ロータ
２およびこれに附属する部材は、第１図に示した従来装
置と同等のものである。The portion to the right of the reference line xx', that is, the intermediate pressure rotor 2 and its attached members, is the same as the conventional device shown in FIG.
そして、高圧ロータ１′はオーステナイト合金系強靭鋼
の１２ Ｃｒ −Ｍｏ−Ｖで作られ、そのジャーナル部
には焼ばめジャーナル５／、５／が嵌着されていて、第
１軸受３′、第２軸受４′によって支承されている。The high-pressure rotor 1' is made of 12 Cr-Mo-V, which is a strong austenitic alloy steel, and has shrink-fit journals 5/, 5/ fitted in its journal portion, and a first bearing 3', It is supported by a second bearing 4'.
而して本実施例においては、非オーステナイト系の強靭
鋼としてＩＣｒ−ＭＯ−■鋼で作られた中間ロータ１９
を設け、この中間ロータ１９を高圧ロータ１′と中圧ロ
ータ２との間に同一軸線状に介装固着するとともに、そ
の中央部付近に推力軸受１２を設けている。In this embodiment, the intermediate rotor 19 is made of ICr-MO-■ steel as a non-austenitic strong steel.
The intermediate rotor 19 is interposed and fixed coaxially between the high pressure rotor 1' and the intermediate pressure rotor 2, and a thrust bearing 12 is provided near the center thereof.
中間ロータ１９を介装固着する手段として、その両端に
削出しカップリング２０および同２１を設け、それぞれ
、高圧ロータ１′に固着された焼きばめカップリング２
３および中圧ｄ−夕２に固着された焼きばめカップリン
グ９と対向せしめてボルトで締結している。As means for interposing and fixing the intermediate rotor 19, machined couplings 20 and 21 are provided at both ends thereof, and shrink-fit couplings 2 are respectively fixed to the high-pressure rotor 1'.
3 and a shrink-fit coupling 9 fixed to the medium pressure d-coupling 2, and are fastened with bolts.
中間ロータ１９の中央部に推力軸受１２を設けるために
、中間ロータの中央付近に一対のフランジ状推力受部２
２．２２を形成し、双方のフランジ状部が対向する面を
推力受は面として、この両面の間に推力軸受１２を嵌合
している。In order to provide the thrust bearing 12 at the center of the intermediate rotor 19, a pair of flange-shaped thrust bearing portions 2 are provided near the center of the intermediate rotor.
2.22, the surfaces where both flanged portions face each other are used as surfaces of the thrust bearing, and the thrust bearing 12 is fitted between these both surfaces.
この実施例のロータ系は、高圧ロータ１′、および中圧
ロータ２の双方がオーステナイト合金系の強靭鋼１２
Ｃｒ −Ｍｏ −Ｖで作られているので、５５６℃程度
の高温蒸気で運転されても充分な高温強度と靭性とを有
している。In the rotor system of this embodiment, both the high-pressure rotor 1' and the intermediate-pressure rotor 2 are made of strong steel made of austenitic alloy.
Since it is made of Cr-Mo-V, it has sufficient high-temperature strength and toughness even when operated with high-temperature steam of about 556°C.
そして、推力軸受１２に摺接する推力受は部２２は非オ
ーステナイト系の強靭鋼Ｉ Ｃｒ −Ｍｏ −Ｖで作ら
れているので、適当な潤滑を行えば充分の耐久性を示し
、摺り傷を発生するおそれが少ない。Since the thrust bearing part 22 that makes sliding contact with the thrust bearing 12 is made of non-austenitic strong steel ICr-Mo-V, it exhibits sufficient durability with proper lubrication and does not cause scratches. There is little risk of it happening.
第１図に示した従来型のロータ系を用いて、蒸気条件２
４６ｋｇ／ｃｙｙＬ ＆−５３８７５６６℃でタービン
を運転した場合に比して、第２図に示した本発明の実施
例を用いて蒸気条件２４６ｋｇ／Ｃ１１１・９−５６６
１５６６で運転した場合、０．９％の効率向上が得られ
た。Using the conventional rotor system shown in Figure 1, steam condition 2
Compared to the case where the turbine was operated at 46 kg/cyyL & -5387566°C, using the embodiment of the present invention shown in Fig.
When operating at 1566, an efficiency improvement of 0.9% was obtained.
以上説明したように、本発明によれば、同一軸線状に直
結される２本の蒸気タービン用ロータ軸の両方をオース
テナイト合金系強靭鋼で製作して充分の高温強度を得る
とともに、両ロータの結合部付近に摺り傷を発生するお
それの少ないスラスト軸受を設けてスラスト方向の位置
ぎめをすることができる。As explained above, according to the present invention, both of the two steam turbine rotor shafts that are directly connected to each other on the same axis are made of strong austenitic alloy steel to obtain sufficient high-temperature strength, and the rotor shafts of both rotors are Positioning in the thrust direction can be performed by providing a thrust bearing that is less likely to cause scratches near the joint.
第１図は従来用いられている蒸気タービンロータ系の断
面図、第２図は本発明の一実施例の断面図である。
１．１・・・・・・高圧ロータ、２・・・・・・中圧ロ
ータ、３．３′・・・・・・第一軸受、４，４′・・・
・・・第２軸受、５．５′・・・・・・焼きばめジャー
ナル、６・・・・・・第３軸受、７・・・・・・第４軸
受、８，１４・・・・・・削り出しカツプリング、９，
１５，２３・・・・・・焼きばめカップリング、１０，
１７・・・・・・ボルト、１１，２２・・・・・・推力
受は部、１２・・・・・・推力軸受、１９・・・・・・
中間ロータ、２０．２１・・・・・・削り出しカップリ
ング。FIG. 1 is a sectional view of a conventional steam turbine rotor system, and FIG. 2 is a sectional view of an embodiment of the present invention. 1.1... High pressure rotor, 2... Medium pressure rotor, 3.3'... First bearing, 4,4'...
...Second bearing, 5.5'...Shrink fit journal, 6...Third bearing, 7...Fourth bearing, 8,14... ...Machined cutlet spring, 9,
15,23...Shrink fit coupling, 10,
17... Bolt, 11, 22... Thrust bearing, 12... Thrust bearing, 19...
Intermediate rotor, 20.21... Machined coupling.
Claims (1)
てなる蒸気タービンロータ系において、オーステナイト
合金系強靭鋼で作られた２本のロータの間に、非オース
テナイト合金系の材料で作られた中間ロータを介装し、
この中間ロータに推力受は面を形成したことを特徴とす
る蒸気タービンロータ系。1 In a steam turbine rotor system in which adjacent rotors are arranged on the same axis and are directly connected, a rotor made of a non-austenitic alloy material is placed between two rotors made of austenitic alloy-based strong steel. Interposed with an intermediate rotor,
A steam turbine rotor system characterized in that a thrust receiver is formed as a surface on this intermediate rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16798780A JPS5944481B2 (en) | 1980-12-01 | 1980-12-01 | steam turbine rotor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16798780A JPS5944481B2 (en) | 1980-12-01 | 1980-12-01 | steam turbine rotor system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5793605A JPS5793605A (en) | 1982-06-10 |
| JPS5944481B2 true JPS5944481B2 (en) | 1984-10-30 |
Family
ID=15859696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16798780A Expired JPS5944481B2 (en) | 1980-12-01 | 1980-12-01 | steam turbine rotor system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5944481B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200089165A (en) | 2019-01-16 | 2020-07-24 | 주식회사 엘지화학 | Charging method for decreasing charging time |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120177494A1 (en) * | 2011-01-06 | 2012-07-12 | General Electric Company | Steam turbine rotor with mechanically coupled high and low temperature sections using different materials |
| US8944761B2 (en) * | 2011-01-21 | 2015-02-03 | General Electric Company | Welded rotor, a steam turbine having a welded rotor and a method for producing a welded rotor |
-
1980
- 1980-12-01 JP JP16798780A patent/JPS5944481B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200089165A (en) | 2019-01-16 | 2020-07-24 | 주식회사 엘지화학 | Charging method for decreasing charging time |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5793605A (en) | 1982-06-10 |
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