Search International and National Patent Collections

1. (WO2015115558) SEAL STRUCTURE AND ROTATING MACHINE

Pub. No.:    WO/2015/115558    International Application No.:    PCT/JP2015/052553
Publication Date: Fri Aug 07 01:59:59 CEST 2015 International Filing Date: Fri Jan 30 00:59:59 CET 2015
IPC: F16J 15/447
F01D 11/02
F01D 11/08
F02C 7/28
Applicants: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
三菱日立パワーシステムズ株式会社
Inventors: NISHIKAWA Toyoharu
西川 豊治
KUWAMURA Yoshihiro
桑村 祥弘
OYAMA Hiroharu
大山 宏治
TANAKA Yoshinori
田中 良典
NISHIMOTO Shin
西本 慎
MATSUMOTO Kazuyuki
松本 和幸
UEHARA Hidekazu
上原 秀和
Title: SEAL STRUCTURE AND ROTATING MACHINE
Abstract:
 Provided is a seal structure (2) for sealing a gap between a first structural body (10) and a second structural body (51) facing the first structural body (10) in a radial direction,wherein the seal structure (2) is provided with: a peripheral surface (4) formed on either the first structural body (10) or the second structural body (51), the peripheral surface (4) being parallel to an axis line; a plurality of seal fins (5) protruding toward the peripheral surface (4), the seal fins (5) being provided at gaps in the axis line direction from the peripheral surface (4) so as to form clearances (m); and protrusions (7) that form re-adhesion edges (15) between pairs of axially adjacent seal fins (5), the re-adhesion edges (15) being locations at which leak currents (SL) re-adhere that have passed through a clearance (mA) of an upstream-side seal fin (5a), and the protrusions (7) also forming first cavities (17) in which eddies (B1) are created that flow along the upstream-side seal fin (5a) toward the second structural body (51), and second cavities (18) in which currents (B2) are created that cause a contraction flow effect on a clearance (mB) of a downstream-side seal fin (5b).