| 摘要 |
A fuel pump 10 may be with a substantially disk-shaped impeller 20 and a casing 14 for housing the impeller 20 such that the impeller 20 can rotate. Permanent magnets 26 may be disposed in the impeller 20. A driving coil 40 may be disposed in the casing 14 at a location opposite the permanent magnets 26. The impeller 20 rotates when power is supplied to the driving coil 40. The fuel pump 10 may include a supporting device 42 for supporting the impeller. The supporting device 42 may be located in at least one location in an inner face of the casing 14, this inner face of the casing being located opposite an upper face, a lower face, and an outer peripheral face of the impeller 20. It is preferred that the supporting device 42 has a rolling element that makes rolling contact with the impeller 20.
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