Title:
SHAFT SEALING DEVICE AND ROTARY MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/223655
Kind Code:
A1
Abstract:
This shaft sealing device is disposed between a rotor and a stator, and partitions an annular space between the outer peripheral surface of the rotor and the inner peripheral surface of the stator into a first axial side and a second axial side. The shaft sealing device comprises fins radially protruding from the rotor toward the stator, and a sealing member radially facing the fins, wherein the sealing member comprises: a first sealing layer formed of a porous abradable material having a first porosity; and a second sealing layer which is stacked on the first sealing layer at a position close to the fins and forms a contact surface with the fins, and is formed of a porous abradable material having a second porosity lower than the porosity of the first sealing layer.
Inventors:
OZAKI KOHEI (JP)
UEHARA HIDEKAZU (JP)
YOSHIDA AZUMI (JP)
YANASE YUTA (JP)
NISHIMOTO SHIN (JP)
FURUSHO TATSURO (JP)
SEGAWA KIYOSHI (JP)
NAKANO TAKASHI (JP)
UEHARA HIDEKAZU (JP)
YOSHIDA AZUMI (JP)
YANASE YUTA (JP)
NISHIMOTO SHIN (JP)
FURUSHO TATSURO (JP)
SEGAWA KIYOSHI (JP)
NAKANO TAKASHI (JP)
Application Number:
PCT/JP2023/010749
Publication Date:
November 23, 2023
Filing Date:
March 17, 2023
Export Citation:
Assignee:
MITSUBISHI POWER LTD (JP)
MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
F01D11/02; F01D25/00; F02C7/28; F16J15/447
Foreign References:
| JP2011007153A | 2011-01-13 | |||
| JPS55101733A | 1980-08-04 | |||
| JP2016540890A | 2016-12-28 | |||
| JP2017218635A | 2017-12-14 | |||
| US20130260132A1 | 2013-10-03 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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