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Patent Searching and Data


Title:
ANNULAR BLOWER
Document Type and Number:
Japanese Patent JPS5677595
Kind Code:
A
Abstract:

PURPOSE: To prevent leakage of high-pressure air by a method wherein such a gap that a casing and a ring substantially do not contact with each other is provided between the casing and the ring by using a ring made of a hard, light-weighted resin.

CONSTITUTION: An annular groove 22 opening toward the casing 4 is provided at the lateral part of a vane wheel 21 which is faced to the casing 4 with a small gap therebetween. The ring 23 made of the hard, light-weighted resin such as polystyrene foam is fixed in the groove 22 by fitting under pressure. The pressure contact surface of the ring 23 is worn in a short period of time accompanying with the rotation of the wheel 21, and the gap substantially preventing the casing 4 and the ring 23 from mutual contact is formed between the casing 4 and the ring 23 after the blower is operated for a certain period of time. Accordingly, leakage of air at the part in question can be prevented.


Inventors:
Tanaka, Tadao
Application Number:
JP1979000155086
Publication Date:
June 25, 1981
Filing Date:
November 30, 1979
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD
International Classes:
F04D23/00; (IPC1-7): F04D23/00