Title:
BLOWER
Document Type and Number:
WIPO Patent Application WO/2021/246029
Kind Code:
A1
Abstract:
Provided is a blower that includes a rotating shaft (21) inserted into a shaft hole (12) of a casing (10) in which a gas passage (11) is formed, an impeller (22) supported by the rotating shaft (21), and a sealing device (30) sealing the shaft hole (12), wherein the sealing device (30) includes first and second seal rings (31) and (32) surrounding the rotating shaft (21) near the shaft hole (12), a shaft sealing box (33) surrounding these seal rings, a static pressure gas sealing means (40) in which is formed a main sealing chamber (42) for introducing seal air having a pressure higher than that inside a gas passage (11) to prevent exhaust gas from leaking from the gas passage (11) to the atmosphere side, and a backup sealing means (60) that includes an annular third seal ring (61) surrounding the rotating shaft (21) on an axially outer side with respect to the shaft sealing box (33) and forms an auxiliary sealing chamber (62) limiting the leakage of seal air from the main sealing chamber (42) to the atmosphere side.
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| JPH01244196 | AIR BLOWER |
| JPH04246297 | ELECTRIC FAN |
Inventors:
SAKATA KAZUO (JP)
OKUNO KAORU (JP)
KINOSHITA TATSUO (JP)
OKUNO KAORU (JP)
KINOSHITA TATSUO (JP)
Application Number:
PCT/JP2021/011827
Publication Date:
December 09, 2021
Filing Date:
March 23, 2021
Export Citation:
Assignee:
OSAKA BLOWER MFG CO LTD (JP)
International Classes:
F04D25/08; F04D29/08; F04D29/12
Domestic Patent References:
| WO2020017635A1 | 2020-01-23 |
Foreign References:
| JPS624663A | 1987-01-10 | |||
| JP2012107609A | 2012-06-07 | |||
| JP2016089671A | 2016-05-23 | |||
| JP2014125986A | 2014-07-07 |
Attorney, Agent or Firm:
ARIGA, Eiichiro et al. (JP)
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