| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable submerged motor-driven pump that is structured small and light, is conveniently carried in emergency, and can use same pump components even when frequency of a power supply is different. SOLUTION: In this portable submerged motor-driven pump using a DC brush-less motor, a motor shaft 5 is made of an aluminum alloy, a magnetic cylinder 10 is engaged with the outer peripheral surface of the aluminum-alloy- made motor shaft 5 in a portion facing to the inner peripheral surface of a stator 2, a plurality of vertical magnet plates 11 are circumferentially arranged and fixed on the outer peripheral surface of the magnetic cylinder in parallel in a constant interval, an upper projecting part 5a of the motor shaft 5 is journalled to a bearing 7 of a power-side bearing bracket 3, a handle is mounted on a head cover 12, a lower projecting part 5b of the motor shaft 5 is journalled to a bearing 8 of a load-side bearing bracket 4, and an impeller 18 in a pump casing 9 is mounted to the extending tip.
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