Title:
遠心式液体ポンプ装置
Document Type and Number:
Japanese Patent JP3996775
Kind Code:
B2
Abstract:
A centrifugal fluid pump apparatus (1) includes a control mechanism (6); and a body 5 including a pump section (2) having an impeller (21) rotating inside a housing (20); a rotor (31) having an impeller attraction magnet (33); a motor (34) for rotating the rotor (31); an impeller attraction electromagnet (41) for attracting the impeller (21) thereto; an impeller-position detection sensor (42); and a groove (38) for hydrodynamic bearing provided on an inner surface of the housing (20). The control mechanism (6) has a position sensor output monitoring function (56) or an electromagnet current monitoring function (57), a motor current monitoring function; and an emergency impeller rotation function. The impeller rotation function operates when the sensors (42) or the electromagnet (41) has a failure by using the position sensor output monitoring function (56) or the electromagnet current monitoring function (57) to rotate the impeller (21) by utilizing the groove (38) for hydrodynamic bearing.
Inventors:
Mitsutoshi Yaegashi
Takehiko Asada
Takehiko Asada
Application Number:
JP2002002584A
Publication Date:
October 24, 2007
Filing Date:
January 09, 2002
Export Citation:
Assignee:
Terumo Corporation
ntn corporation
ntn corporation
International Classes:
F04D15/00; F04D29/046; A61M1/10; F04D13/02; F04D15/02; F04D29/00; F04D29/04; F04D29/041; F04D29/047; F04D29/048; F04D29/42
Domestic Patent References:
| JP9206372A | ||||
| JP2001041166A |
Attorney, Agent or Firm:
Shoichi Mukaiyama