JP2008274817A - Steam turbine cylinder communication pipe - Google Patents
Steam turbine cylinder communication pipe Download PDFInfo
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- JP2008274817A JP2008274817A JP2007117924A JP2007117924A JP2008274817A JP 2008274817 A JP2008274817 A JP 2008274817A JP 2007117924 A JP2007117924 A JP 2007117924A JP 2007117924 A JP2007117924 A JP 2007117924A JP 2008274817 A JP2008274817 A JP 2008274817A
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Abstract
Description
本発明は蒸気タービン気筒連絡管に関する。 The present invention relates to a steam turbine cylinder connecting pipe.
蒸気タービンの気筒連絡管では、中圧タービンの最終段出口から排出された蒸気を低圧タービンの複数の車室(低圧部)へ導く。そして、複数の低圧部に導くために分岐部が設けられる。この分岐部は、直角方向に分岐する構造となっている。 In the cylinder connecting pipe of the steam turbine, the steam discharged from the final stage outlet of the intermediate pressure turbine is guided to a plurality of cabins (low pressure portions) of the low pressure turbine. And a branch part is provided in order to guide to a plurality of low-pressure parts. This branch portion has a structure that branches in a right angle direction.
なお、高圧タービン又は中圧タービンの車室出口から流出する蒸気を複数の低圧タービンへと導く蒸気タービン気筒連絡管として、例えば特許文献1に記載のものがある。
In addition, there exists a thing of
分岐部が直角方向に分岐する構造となっているため、蒸気が慣性力で直進する方向に流れ易くなっている。このため、複数の低圧部間では蒸気の分配が均等とならず、本流管側に多く流れてしまう。このため、低圧タービンの負荷分配が不均衡となり、タービン全体の効率が低下することになる。また、分岐部は直角方向に分岐しているため、圧力損失も大きくなり、更に効率が低下することになる。 Since the branching portion has a structure that branches in a right angle direction, the steam easily flows in a direction that goes straight by inertial force. For this reason, the distribution of the steam is not uniform among the plurality of low-pressure parts, and a large amount flows to the main flow pipe side. For this reason, the load distribution of the low-pressure turbine becomes unbalanced, and the efficiency of the entire turbine is reduced. In addition, since the branching portion branches in the right angle direction, the pressure loss increases and the efficiency further decreases.
本発明は、蒸気量を適正に分配することができ、さらに、分岐部の圧力損出も少なくすることができる構造を有する蒸気タービン気筒分岐管を提供することを目的とする。 An object of the present invention is to provide a steam turbine cylinder branch pipe having a structure capable of appropriately distributing the amount of steam and further reducing pressure loss at the branch portion.
本発明は、蒸気タービン気筒連絡管を本流管と分岐管から構成し、分岐管を本流管に対して下流側に傾斜して分岐するように設け、分岐部の下流側の本流管と分岐管の接続部に補強板を設け、該補強板を蒸気通路側に突出させるようにしたことを特徴とする。 In the present invention, the steam turbine cylinder connecting pipe is composed of a main flow pipe and a branch pipe, and the branch pipe is provided so as to branch by being inclined downstream with respect to the main flow pipe, and the main flow pipe and the branch pipe downstream of the branch portion. A reinforcing plate is provided at the connecting portion, and the reinforcing plate protrudes toward the steam passage.
また、本流管の途中に管径を縮小する絞り部を設け、分岐管をこの絞り部に設けたことを特徴とする。 In addition, a throttle part for reducing the pipe diameter is provided in the middle of the main flow pipe, and a branch pipe is provided in the throttle part.
また、補強板の蒸気通路側先端における本流管側の径φd1と分流管側の径φd2が略等しくなるように、補強板の蒸気通路側への突出長さと傾斜角度を設定したことを特徴とする。 In addition, the length and inclination angle of the reinforcing plate projecting to the steam passage side are set so that the diameter φd1 on the main flow pipe side and the diameter φd2 on the shunt pipe side at the steam passage side tip of the reinforcing plate are substantially equal. To do.
本発明によれば、蒸気量を適正に分配することができるようになり、さらに、分岐部の圧力損出も少なくなり、高効率な蒸気タービンが得られる。また、分岐管を傾斜させることに伴う分岐部の応力も低減することができる。 According to the present invention, the amount of steam can be properly distributed, and the pressure loss at the branching portion is reduced, and a highly efficient steam turbine can be obtained. Moreover, the stress of the branch part accompanying inclination of a branch pipe can also be reduced.
図面を用いて本発明の一実施例を説明する。 An embodiment of the present invention will be described with reference to the drawings.
図1は、本発明の一実施例である蒸気タービン気筒連絡管の構成を示す図である。本発明は、高圧又は中圧タービンの車室出口から出た蒸気を低圧タービンの複数の車室入口に分配する蒸気タービン気筒連絡管に関するものであるが、本実施の形態では、中圧タービンの車室出口(最終段出口)から流出する蒸気を2つの低圧タービンへと導く場合を代表例として説明する。 FIG. 1 is a diagram showing a configuration of a steam turbine cylinder communication pipe according to an embodiment of the present invention. The present invention relates to a steam turbine cylinder connecting pipe that distributes steam emitted from a compartment outlet of a high-pressure or medium-pressure turbine to a plurality of compartment inlets of a low-pressure turbine. A case where the steam flowing out from the passenger compartment outlet (final stage outlet) is led to two low-pressure turbines will be described as a representative example.
中圧タービンの車室出口2a,2bから流出する蒸気が気筒連絡管(本流管)1を通って分岐部4に達する。本流管は、中圧タービンや低圧タービンの軸とほぼ平行に伸びる直管部となっている。また、本流管は、ほぼ水平に配設された直管部の途中に管径を縮小する絞り部を有しており、絞り部よりも上流側の大径部と絞り部よりも下流側の小径部とにさらに分けられる。小径部はその管中心線が大径部の管中心線よりも上方に偏心しており、本実施の形態において大径部と小径部は、上方側の管壁がほぼ一直線状となるように絞り部を介して連接されている。
Steam flowing out from the
蒸気は、分岐部で第一低圧タービンと第二低圧タービンに分配される。本実施例では分岐部が絞り部に設けられている。分岐部では、分岐管が本流管の下方に設けられ、また、下流側に傾斜するように本流管に接続されている。この傾斜角度は、45度から60度の範囲で角度を持たせることにより、気筒連絡管の分岐部で主流と分流に蒸気量の分配を均等にすることができる。分配された蒸気の分流は第一低圧タービン車室入口3aへ、本流は第二低圧タービン車室入口3bへと流れる。ここで、第一低圧タービンの前に設けられた分岐部4には、分岐部の補強のための補強板5が設けられている。
Steam is distributed at the bifurcation to the first low pressure turbine and the second low pressure turbine. In the present embodiment, the branch portion is provided in the throttle portion. In the branch part, a branch pipe is provided below the main pipe, and is connected to the main pipe so as to incline downstream. By providing the inclination angle in the range of 45 degrees to 60 degrees, the distribution of the steam amount can be made equal to the main flow and the branch flow at the branch portion of the cylinder connecting pipe. The divided steam flow flows to the first low-pressure
図2は分岐部の拡大したもので、補強板5は分岐する管aとbが交差する部分に傾斜角度αを設けて設置する。さらに補強板は蒸気通路側に突出させている。補強板の突出長さLは、補強板の先端位置において、本流管aと分流管bの面積がほぼ等しくなるよう(φd1≒φd2)に設定する。
FIG. 2 is an enlarged view of the branching portion, and the reinforcing
気筒連絡管の分岐部で分岐管を本流管に対して傾斜させて設けた場合、分岐部の管形状が楕円となる。このため、圧力が加わった場合、真円になろうと変形し、曲げ半径の小さい部分に応力集中が発生する。この応力を低減するために補強板を設けている。さらに、この補強板を流路側に突出させることにより、分流側の蒸気量が制御できるようになる。すなわち、突出させた補強板の傾斜角度αを大きくすると分流側の蒸気量は増加し、小さくすると分流側の蒸気量は減少する。また、分岐部の流れが円滑になり圧力損失も小さくなる。 When the branch pipe is inclined with respect to the main flow pipe at the branch part of the cylinder communication pipe, the pipe shape of the branch part becomes an ellipse. For this reason, when pressure is applied, it deforms to become a perfect circle, and stress concentration occurs in a portion with a small bending radius. In order to reduce this stress, a reinforcing plate is provided. Furthermore, the amount of steam on the diversion side can be controlled by projecting the reinforcing plate toward the flow path. That is, when the inclination angle α of the protruding reinforcing plate is increased, the steam amount on the diversion side increases, and when it is decreased, the steam amount on the diversion side decreases. Moreover, the flow of the branch part becomes smooth and the pressure loss is also reduced.
1 気筒連絡管(本流管)
2a,2b 中圧タービンの車室出口
3a 第一低圧タービン車室入口
3b 第二低圧タービン車室入口
4 分岐部
5 補強板
1 cylinder communication pipe (main pipe)
2a, 2b Medium pressure
Claims (3)
前記蒸気タービン気筒連絡管は本流管と分岐管から構成され、前記分岐管は前記本流管に対して下流側に傾斜して分岐するように設けられ、分岐部の下流側の前記本流管と前記分岐管の接続部に補強板が設けられ、該補強板は蒸気通路側に突出するように設けられていることを特徴とする蒸気タービン気筒連絡管。 A steam turbine cylinder connecting pipe for guiding steam flowing out from a compartment outlet of a high-pressure or medium-pressure turbine to an inlet of a low-pressure turbine having at least two compartments,
The steam turbine cylinder connecting pipe is composed of a main pipe and a branch pipe, and the branch pipe is provided so as to be inclined and branched downstream with respect to the main pipe, and the main pipe on the downstream side of the branch portion and the branch pipe A steam turbine cylinder connecting pipe, wherein a reinforcing plate is provided at a connecting portion of the branch pipe, and the reinforcing plate is provided so as to protrude to the steam passage side.
Priority Applications (1)
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JP2007117924A JP4957358B2 (en) | 2007-04-27 | 2007-04-27 | Steam turbine cylinder connection pipe |
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JP2007117924A JP4957358B2 (en) | 2007-04-27 | 2007-04-27 | Steam turbine cylinder connection pipe |
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JP4957358B2 JP4957358B2 (en) | 2012-06-20 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114542195A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Reversing air cylinder air inlet pipe structure of marine steam turbine |
JP7413244B2 (en) | 2020-12-23 | 2024-01-15 | 株式会社クボタ | mower unit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5456002A (en) * | 1977-10-12 | 1979-05-04 | Mitsui Mining & Smelting Co | Treating of oxidized ore |
JPH05125907A (en) * | 1991-10-30 | 1993-05-21 | Toshiba Corp | Heat insulation device for branch pipe |
JPH08281437A (en) * | 1995-04-06 | 1996-10-29 | Daihen Corp | Welding head for submerged arc welding |
JP2002021506A (en) * | 2000-07-11 | 2002-01-23 | Babcock Hitachi Kk | Pipe repair device |
-
2007
- 2007-04-27 JP JP2007117924A patent/JP4957358B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5456002A (en) * | 1977-10-12 | 1979-05-04 | Mitsui Mining & Smelting Co | Treating of oxidized ore |
JPH05125907A (en) * | 1991-10-30 | 1993-05-21 | Toshiba Corp | Heat insulation device for branch pipe |
JPH08281437A (en) * | 1995-04-06 | 1996-10-29 | Daihen Corp | Welding head for submerged arc welding |
JP2002021506A (en) * | 2000-07-11 | 2002-01-23 | Babcock Hitachi Kk | Pipe repair device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7413244B2 (en) | 2020-12-23 | 2024-01-15 | 株式会社クボタ | mower unit |
CN114542195A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Reversing air cylinder air inlet pipe structure of marine steam turbine |
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JP4957358B2 (en) | 2012-06-20 |
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