| 摘要 |
Permanent magnets (30, 31) are placed in both sides on the basis of a centerline of a rotor (16) perpendicular to a direction of a load applied to an impeller (4) by a pressure distribution within a pump flow path (7), and also an axial center (31a) of the permanent magnet (31) is placed with the axial center offset to the side of the impeller (4) from an axial center (30a) of the other permanent magnet (30) and a turning moment is generated on the rotor (16) and thereby, a load applied to bearings (17, 18) is reduced and an electric motor-driven fuel pump difficult to occurrence of a decrease in pump efficiency and wear in the bearings (17, 18) is obtained. <IMAGE> |
