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Patent Searching and Data


Title:
VORTEX PUMP
Document Type and Number:
Japanese Patent JP2005069127
Kind Code:
A
Abstract:

To prevent lowering of pump efficiency by approaching the center of a swirl flow in a vortex pump 1 to the axial outer edge of a blade 3 to decrease an area inhibiting the air from returning to a blade passing part 18.

When the axial width of the blade 3 is taken as (a) and the distance between the axial inner wall of a fluid passage 2 and the axial outer edge of the blade 3 is taken as (b), the blade 3 is disposed in the fluid passage 2 to satisfy the relationship expressed by 0.60≤b/a≤0.76. Thus, although the center of the swirl flow separates from the axial edge part of the blade to be biased to the blade non-passing part in the conventional vortex pump, such biasing can be prevented not to lower the pump efficiency.


Inventors:
Yasuda, Masanori
Yokoyama, Shinichi
Application Number:
JP2003000301184
Publication Date:
March 17, 2005
Filing Date:
August 26, 2003
Export Citation:
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Assignee:
NIPPON SOKEN INC
DENSO CORP
International Classes:
F04D23/00; F04D29/30; (IPC1-7): F04D23/00; F04D29/30
Domestic Patent References:
JPH062690A
JPH09242689A
JPH04314996A1992-11-06
Attorney, Agent or Firm:
石黒 健二