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1. (US20180355979) STEP SEAL, SEAL STRUCTURE, TURBO MACHINE, AND METHOD FOR MANUFACTURING STEP SEAL

Office : United States of America
Application Number: 15780752 Application Date: 29.11.2016
Publication Number: 20180355979 Publication Date: 13.12.2018
Publication Kind : A1
Prior PCT appl.: Application Number:PCTJP2016085351 ; Publication Number: Click to see the data
IPC:
F16J 15/447
F01D 11/08
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
J
PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
15
Sealings
44
Free-space packings
447
Labyrinth packings
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
D
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
11
Preventing or minimising internal leakage of working fluid, e.g. between stages
08
for sealing space between rotor blade tips and stator
CPC:
F01D 11/08
F05D 2220/31
F05D 2230/10
F05D 2240/11
F05D 2240/55
F16J 15/447
Applicants: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
Inventors: Toyoharu Nishikawa
Yoshihiro Kuwamura
Hiroharu Oyama
Katsuhisa Hamada
Hideaki Sugishita
Priority Data: 2015-240488 09.12.2015 JP
Title: (EN) STEP SEAL, SEAL STRUCTURE, TURBO MACHINE, AND METHOD FOR MANUFACTURING STEP SEAL
Abstract: front page image
(EN)

There are provided a step seal, a seal structure, a turbo machine, and a method for manufacturing a step seal. The step seal suppresses leak of a fluid from a gap between a first structure and a second structure and is formed on the first structure so as to have a clearance between the step seal and a seal fin formed on the second structure. The first structure and the second structure face each other in a radius direction with the gap inbetween and rotate around an axis line relative to each other. The step seal includes: a step seal body having a step face facing an upstream side of a flow direction of the fluid and an opposed face facing the second structure; and a protrusion formed between the step face and the opposed face.


Also published as:
KR1020180078282CN108368743DE112016005643IN201817020350WO/2017/098960