Title:
MOTOR PUMP
Document Type and Number:
WIPO Patent Application WO/2021/241146
Kind Code:
A1
Abstract:
A motor pump according to the present invention has a restriction member (24) that, in a state in which a rotating part (6) of a motor (2) is in contact with a first bearing (21), is fixed to a pump shaft (4) and restricts movement of an impeller (7) toward a pump casing body (23) side so as to maintain a clearance of a prescribed value between a side surface of the impeller (7) and a wall surface (23a) of the pump casing body (23). A protrusion (35) which protrudes toward a side surface of the impeller (7) is formed on a wall surface (19a) of a middle casing (19). When the impeller (7) is in a middle position between the wall surface (23a) of the pump casing body (23) and the wall surface (19a) of the middle casing (19), the projection size of the protrusion (35) from the wall surface (19a) of the middle casing (19) is set such that the protrusion (35) does not contact the side surface on the middle casing side of the impeller (7).
Inventors:
CAO YINCHUN (JP)
NAGANO HIROTADA (JP)
IMAGAWA YU (JP)
NORISADA KENTA (JP)
NAGANO HIROTADA (JP)
IMAGAWA YU (JP)
NORISADA KENTA (JP)
Application Number:
PCT/JP2021/017313
Publication Date:
December 02, 2021
Filing Date:
May 04, 2021
Export Citation:
Assignee:
SANSO ELEC MFG (JP)
International Classes:
F04D5/00; F04D13/06
Foreign References:
| JP2009299628A | 2009-12-24 | |||
| JP2016160760A | 2016-09-05 | |||
| JP2019210869A | 2019-12-12 | |||
| JP2016037952A | 2016-03-22 | |||
| DE4315448A1 | 1993-12-23 |
Attorney, Agent or Firm:
ASHIKITA Tomoharu (JP)
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