Title:
LABYRINTH SEAL
Document Type and Number:
WIPO Patent Application WO/2017/221771
Kind Code:
A1
Abstract:
The present invention is able to limit the amount of fluid leakage. A high pressure-side fin (51) is provided on the high pressure-side (X1) of a level difference (40). A low pressure-side fin (52) is provided on the low pressure-side (X2) of the level difference (40). A ring-shaped groove (70) is formed in a portion of a rotating body (20) on the one direction-side (Y1) of the facing direction. The level difference (40) is configured so that a low pressure-side step (42), which is a portion of the rotating body (20) on the low pressure-side (X2) of the level difference (40), is disposed on the other direction-side (Y2) of the facing direction with respect to a high pressure-side step (41), which is a portion of the rotating body (20) on the high pressure-side (X1) of the level difference (40). The ring-shaped groove (70) is disposed in at least a portion of the region on the low pressure-side (X2) of the level difference (40) and on the high pressure-side (X1) of the low pressure-side fin (52).
Inventors:
MORINAKA SHUNSUKE
Application Number:
PCT/JP2017/021830
Publication Date:
December 28, 2017
Filing Date:
June 13, 2017
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
F16J15/447; F01D11/02; F04D29/16
Foreign References:
| JP2011174451A | 2011-09-08 | |||
| JP2002228014A | 2002-08-14 | |||
| JPS53104803U | 1978-08-23 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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