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Title:
VORTEX PUMP
Document Type and Number:
WIPO Patent Application WO/2017/090398
Kind Code:
A1
Abstract:
This vortex pump for pumping gas is provided with a housing, and an impeller which is accommodated in the housing, and which rotates around a rotational axis. The impeller is provided with: a plurality of blades which are provided along the rotation direction, to an outer circumferential portion of at least one end surface of two end surfaces; a plurality of blade grooves which are respectively provided between adjacent blades; and an outer circumferential wall which closes the impeller-outer-circumference side of the plurality of blade groves at the outer circumferential edge. The housing is provided with a facing groove which faces a blade groove region, and extends in the rotation direction of the impeller. Each of the plurality of blade grooves is open at the one end surface of the impeller, and closed at the other end surface of the impeller. When the one end surface of the impeller is viewed in a plan view, each of the plurality of blades is curved, and central portions of the blades are positioned further forward in the rotation direction of the impeller than ends of the blades.

Inventors:
NAKAMURA Eiji (1-1 Kyowa-cho 1-chome, Obu-sh, Aichi 88, 〒4748588, JP)
Application Number:
JP2016/082586
Publication Date:
June 01, 2017
Filing Date:
November 02, 2016
Export Citation:
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Assignee:
AISAN KOGYO KABUSHIKI KAISHA (1-1 Kyowa-cho 1-chome, Obu-shi Aichi, 88, 〒4748588, JP)
International Classes:
F04D23/00
Foreign References:
JPH02215997A1990-08-28
JP2007247421A2007-09-27
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (NAGOYA LUCENT TOWER 9F, 6-1 Ushijima-cho,Nishi-ku, Nagoya-sh, Aichi 09, 〒4516009, JP)
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