Title:
蒸気タービン
Document Type and Number:
Japanese Patent JP7288374
Kind Code:
B2
Abstract:
To provide a turbine system which is adapted to a high temperature and high efficiency, and can cope with a load variation by a steam turbine structure using austenitic heat resistance steel which is high in rigidity, and low in linear expansion.SOLUTION: In a steam turbine composed of a plurality of constituents, at least two constituents are constituted of (i) a combination of austenitic heat resistance steel and ferrite heat resistance steel, or (ii) a combination of the austenitic heat resistance steel and a Ni-base alloy. An average linear expansion coefficient difference Δα(1/°C) between forming materials of the two constituents within a range in which a temperature T(°C) is 400 to 700°C is Δα=(1.5+(1.4×10-3)×T)×10-6 or lower with respect to (i), and Δα=(2.2-(1.4×10-3)×T)×10-6 or lower with respect to (ii).SELECTED DRAWING: Figure 3
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Inventors:
Shun Ikunuma
Kiyoshi Imai
Takahisa
Yujiro Nakatani
Yasuhito Uejo
Kiyoshi Imai
Takahisa
Yujiro Nakatani
Yasuhito Uejo
Application Number:
JP2019166099A
Publication Date:
June 07, 2023
Filing Date:
September 12, 2019
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Energy Systems & Solutions Corporation
Toshiba Energy Systems & Solutions Corporation
International Classes:
F01D25/00; F01D5/28; F01D9/02; F01D25/24; F01D25/28
Domestic Patent References:
| JP2010121502A | ||||
| JP55042148A |
Foreign References:
| WO2016111249A1 |
Attorney, Agent or Firm:
Hiroyuki Nagai
Yukitaka Nakamura
Satoru Asakura
Takeshi Sekine
Hideaki Maekawa
Jun Suzuki
Yukitaka Nakamura
Satoru Asakura
Takeshi Sekine
Hideaki Maekawa
Jun Suzuki