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Patent Searching and Data


Title:
VORTEX PUMP
Document Type and Number:
Japanese Patent JPH1061581
Kind Code:
A
Abstract:

To facilitate the positioning at the time of screwing an impeller to a shaft of a driving unit, and to improve the assembling workability by providing one or more holes or recessed parts in a disc-shaped impeller having a blade, which is formed of multiple sector grooves extended in the radial direction in the periphery, at a part inside of the blade part.

A motor 1 as a driving unit of an electric air pump is surrounded by a motor cover 9, and fixed to an inner casing 3 of two casings by a screw 10, and an impeller 7 is fixed to a shaft 4 by a screw 11 so as to form a pump flow passage coaxial with a casing 3. The other casing is fixed to the casing 3 so as to cover the impeller 7, the casing 3 and the pump flow passage. In this case, the impeller 7 is fixed by using an auxiliary appliance through a fixing hole 14 provided inside of a blade part 13 of the impeller 7. With this structure, the impeller 7 can be screwed to the shaft 4 without damaging the blade 13, and since the assembling of a driving unit side can be firstly performed, degree of freedom of assembling can be improved.


Inventors:
HASHIMOTO MANABU
OTAKA YASUNORI
Application Number:
JP21707396A
Publication Date:
March 03, 1998
Filing Date:
August 19, 1996
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F04D5/00; F04D23/00; F04D29/30; (IPC1-7): F04D5/00; F04D23/00; F04D29/30
Attorney, Agent or Firm:
Ogawa Katsuo