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Title:
SEALING STRUCTURE OF TURBINE
Document Type and Number:
Japanese Patent JP2007046540
Kind Code:
A
Abstract:

To provide a sealing structure of a turbine capable of minimizing a clearance provided between a turbine rotor and a seal ring at assembly time and preventing generation of excessive stress due to difference in thermal elongation between a diaphragm and the seal ring at operation time.

This sealing structure of the turbine is provided with the diaphragm 10 positioned between the turbine rotor and a stationary blade, supported on a stationary body side, having a plurality of channels 29 extending in the radial direction in its inner peripheral part, and formed integrally, the seal ring 13 provided on an inner peripheral side of the diaphragm 10, forming a labyrinth seal for sealing a clearance between the turbine rotor and a stationary body, having an insertion hole 28 at a position corresponding to the channel 29 of the diaphragm 10, and formed integrally, and an eccentric pin 14 having a small diameter part and a large diameter part whose central axis is deviated from that of the small diameter part and inserting the small diameter part into the insertion hole 28 of the seal ring 13 and the large diameter part into the channel 29 of the diaphragm, respectively.


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Inventors:
Horiuchi, Yasuhiro
Kuroki, Hidetoshi
Kitsuka, Nobuaki
Marushima, Shinya
Application Number:
JP2005000231864
Publication Date:
February 22, 2007
Filing Date:
August 10, 2005
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F01D11/02; F01D25/00; F02C7/28; F16J15/44; F16J15/447
Domestic Patent References:
JPS63170505A
JPS465647B1
JPS5698504A
JPH02149702A
JP2001123803A
Attorney, Agent or Firm:
春日 讓