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Title:
PUMP DEVICE
Document Type and Number:
Japanese Patent JP2011153549
Kind Code:
A
Abstract:

To provide a pump device achieving a reduction in the thickness of a portion interposed between the salient poles of a stator core and a magnet in a cylindrical barrel without deteriorating the strength of the cylindrical barrel of a pump case partitioning a stator from the magnet.

This pump device 1 is a vortex pump, and the stator 4 and a rotor 5 including an impeller 51 and the magnet 55 are partitioned by the cylindrical barrel 34 of the resin pump casing 3. The pump casing 3 is formed with ribs 39 connected to the cylindrical barrel 34 and a bottom 33. The ribs 39 project from the cylindrical barrel 34 toward portions between the salient poles 44 of the stator core 40. Therefore, in the cylindrical barrel 34, it is possible to reduce the thickness of the portion interposed between the salient poles 44 and the magnet 55 without deteriorating the strength of the cylindrical barrel 34.


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Inventors:
YOKOZAWA MITSUO
Application Number:
JP2010014667A
Publication Date:
August 11, 2011
Filing Date:
January 26, 2010
Export Citation:
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Assignee:
NIDEC SANKYO CORP
International Classes:
F04D5/00; F04D23/00
Domestic Patent References:
JP2001280284A2001-10-10
JP2009284704A2009-12-03
JP2006067729A2006-03-09
JP2007332841A2007-12-27
JP2007151210A2007-06-14
Attorney, Agent or Firm:
Shiro Yokozawa