Title:
TURBO MACHINE
Document Type and Number:
Japanese Patent JP2017160861
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce the leakage of a working fluid in a shaft sealing device of a turbo machine handling liquid as the working fluid, and to reduce unstable fluid force acted on a rotor.SOLUTION: A turbo machine has: a rotor which has an impeller; a bearing which rotatably supports the rotor; a casing which involves the rotor to form a static flow path; and a shaft sealing device which reduces the leakage of the working fluid from a clearance portion between the casing and the rotor. The working fluid is liquid, and the shaft sealing device is provided with a plurality of axial grooves intermittently disposed through a land portion in an axial direction and a circumferential direction of the rotor, on an inner peripheral surface.SELECTED DRAWING: Figure 2
Inventors:
YAMAGUCHI KAZUYUKI
YOSHIDA TETSUYA
KATAYAMA HIROKI
YAMAMOTO HITOSHI
PENG SHICHAO
UENO TAKUMA
YOSHIDA TETSUYA
KATAYAMA HIROKI
YAMAMOTO HITOSHI
PENG SHICHAO
UENO TAKUMA
Application Number:
JP2016046891A
Publication Date:
September 14, 2017
Filing Date:
March 10, 2016
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F04D29/16; F04D1/08; F04D29/66; F16J15/447
Domestic Patent References:
| JPS6116294A | 1986-01-24 | |||
| JP2014219023A | 2014-11-20 | |||
| JP2014126139A | 2014-07-07 | |||
| JPS53117158A | 1978-10-13 | |||
| JPH0271115U | 1990-05-30 | |||
| JP2014238066A | 2014-12-18 | |||
| JP2011185272A | 2011-09-22 | |||
| JP2010196797A | 2010-09-09 |
Foreign References:
| US20110049809A1 | 2011-03-03 | |||
| WO2014077058A1 | 2014-05-22 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation