| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact centrifugal (non-positive displacement type) pump being suitable for the use in a region of a small output by an extremely small amount of water and having a comparatively simple structure. SOLUTION: This motor pump is provided with a motor rotator 20 having a cylindrical motor stator 10 and a permanent magnet 30, formed integrally with an impeller 32, and arranged inside the motor stator 10 and a pump casing 44 fixed to an opening end part of a motor casing 12 so as to cover the impeller 32, and a dynamic pressure bearing 54 is constituted between a front face of the impeller 32 and a spiral groove provided on an inner face of the pump casing 44 opposing to the front face. |
