| 摘要 |
PROBLEM TO BE SOLVED: To provide an artificial heart pump having a constitution for rotating an impeller while being supported in a noncontact state, restraining a mechanical loss, and improving pump efficiency. SOLUTION: This artificial heart pump has the impeller 3 rotatably supported to a fixed shaft body 2 in a housing 1, and a driving mechanism for rotating this impeller, and forcibly sends blood backward by taking in from the front by rotation of the impeller 3. The shaft body 2 is connected between a front side fixed body 5 fixed to a straightening plate 4 joined to the housing 1 in front of the impeller 3, and a rear side fixed body 7 fixed to a diffuser 6 joined to the housing 1 in the rear of the impeller 3. The impeller 3 is composed of a sleeve 8 having front-rear end surfaces opposed in microscopic clearance to a rear end surface of the front side fixed body 5 and a front end surface of the rear side fixed body 7, together with an inner peripheral surface opposed in microscopic clearance to an outer peripheral surface of the shaft body 2, and an impeller 9 joined to an outer peripheral surface of the sleeve 8. The driving mechanism is composed of a polar anisotropic permanent magnet 10 contained in the sleeve 8, and a rotating magnetic field generator 11 contained in the housing 1. COPYRIGHT: (C)2005,JPO&NCIPI
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