SHAFT SEAL DEVICE AND ROTARY MACHINE - MITSUBISHI HEAVY IND LTD

Title:

SHAFT SEAL DEVICE AND ROTARY MACHINE

Document Type and Number:

WIPO Patent Application WO/2014/129371

Kind Code:

A1

Abstract:

Disclosed is a shaft seal device (10) that partitions a space between a rotor (6) and a stator into a high-pressure side and a low-pressure side, the shaft seal device (10) comprising: a seal body (12) made by layering a plurality of thin-plate seal pieces (20) in the circumferential direction of the rotor, each thin-plate seal piece extending from the stator toward the rotor side; and a housing (9) that is fixed to the stator, holds the seal body (12) so as to surround the same from radially outside, and includes a first opposing surface (13) that opposes the high-pressure-side edge of the seal body (12) and a second opposing surface (22) that opposes the low-pressure-side edge (20a) of the seal body. The high-pressure-side clearance (t0) between the seal body (12) and the first opposing surface (13) is smaller than the low-pressure-side clearance (t1) between the seal body (12) and the second opposing surface (22), and a slope part (20b) that slopes gradually toward the high-pressure side toward the tip end, which is on the rotor side, is formed in the low-pressure-side edge (20a) of each thin-plate seal piece (20) of the seal body (12).

Inventors:

UEHARA HIDEKAZU (JP)
NISHIMOTO SHIN (JP)
SHINOHARA TANEHIRO (JP)
OYAMA HIROHARU (JP)

Application Number:

PCT/JP2014/053282

Publication Date:

August 28, 2014

Filing Date:

February 13, 2014

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

F16J15/44; F01D11/00; F01D25/00; F02C7/28; F16J15/16; F16J15/3292

Foreign References:

JP2002013647A	2002-01-18
JP2006052765A	2006-02-23
JP2012177420A	2012-09-13
JPH11513781A	1999-11-24
JP3616016B2	2005-02-02
JP2008509369A	2008-03-27

Other References: