Title:
蒸気タービン
Document Type and Number:
Japanese Patent JP7458947
Kind Code:
B2
Abstract:
A steam turbine 1B comprising a rotor shaft 21 that is configured to rotate about an axis, a plurality of rotor blade rows 31 that are fixed to an outer side in a radial direction about the axis with respect to the rotor shaft 21 and disposed at intervals in an axial direction along which the axis extends, a casing 10 that covers the rotor shaft 21 and the plurality of rotor blade rows 31 and stator vane rows 41 that are fixed to the casing 10, wherein each of the stator vane rows 41 is disposed at intervals on a first side in the axial direction with respect to each of the plurality of rotor blade rows 31, wherein the casing 10 has a diffuser 60 that is configured to guide steam flowing out from a rotor blade row 31F of a final stage, which is disposed on a second side farthest in the axial direction among the plurality of rotor blade rows 31, to an outside of the casing, the diffuser 60 including an outer guide 61 that gradually expands to the outer side in the radial direction from the first side to the second side in the axial direction, an inner guide 62 that is disposed at intervals to the inner side in the radial direction with respect to the outer guide 61 and gradually expands to the outer side in the radial direction from the first side to the second side in the axial direction, the diffuser 60 including a first region P11 that is a region closest to the rotor blade row 31F of the final stage in the axial direction, and in which a cross-sectional area A1 of a flow passage defined between the outer guide 61 and the inner guide 62 gradually decreases toward the second side in the axial direction, and a second region P12 that is connected to the first region P11 on the second side in the axial direction, in which the cross-sectional area A2 of the flow passage gradually increases toward the second side in the axial direction.
Inventors:
Masatomo
Eito Kunimoto
Eito Kunimoto
Application Number:
JP2020154499A
Publication Date:
April 01, 2024
Filing Date:
September 15, 2020
Export Citation:
Assignee:
Mitsubishi Heavy Industries Compressor Corporation
International Classes:
F01D25/30
Domestic Patent References:
| JP6066157A | ||||
| JP2018115581A | ||||
| JP2016148331A |
Foreign References:
| EP3653850A1 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Eisuke Ito
Hiroyuki Hashimoto
Ancient city Satoshi
Koichiro Kamada
Eisuke Ito
Hiroyuki Hashimoto
Ancient city Satoshi
Koichiro Kamada
Previous Patent: construction machinery
Next Patent: Template, template manufacturing method, and semiconductor device manufacturing method
Next Patent: Template, template manufacturing method, and semiconductor device manufacturing method