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Title:
ROTOR DISC, ROTOR SHAFT, TURBINE ROTOR, AND GAS TURBINE
Document Type and Number:
WIPO Patent Application WO/2020/241133
Kind Code:
A1
Abstract:
A rotor disc (60) has diametrically outer surfaces (63, 75b), a diametrically inner surface, a plurality of blade root grooves (64) recessed diametrically inward (Dri) from the diametrically outer surfaces (63) and aligned in a circumferential direction (Dc), and a plurality of hole groups (77) formed in each of the plurality of blade root grooves and aligned in the circumferential direction. Each of the plurality of hole groups has a hole including a cooling orifice (78) penetrating from the diametrically inner surface through to the diametrically outer surface (75b). The width (dgc) of each of the plurality of hole groups in the circumferential direction is greater than the width (dga) of each of the plurality of hole groups in an axial direction (Da) and smaller than a minimum gap (dg) among gaps between the plurality of hole groups in the circumferential direction.

Inventors:
KITAGAWA KAZUKI (JP)
HASHIMOTO SHINYA (JP)
Application Number:
PCT/JP2020/017500
Publication Date:
December 03, 2020
Filing Date:
April 23, 2020
Export Citation:
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Assignee:
MITSUBISHI POWER LTD (JP)
International Classes:
F01D5/02; F01D25/00; F01D25/12; F02C7/12
Domestic Patent References:
WO2017129455A12017-08-03
Foreign References:
JP2009203926A2009-09-10
US6022190A2000-02-08
JP2015206462A2015-11-19
JPS63108345A1988-05-13
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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