| 摘要 |
PROBLEM TO BE SOLVED: To provide a water pump with high convenience having an easy-to-mount and easy-to-maintain structure.SOLUTION: The water pump comprises: a body 11 having a screw mechanism 19 screwed with an apparatus body 12 for circulating fluid by rotating itself; a rotation shaft 14 supported to the body 11 via a bearing 13; an impeller 15 provided at one end of the rotation shaft 14 and conveying the fluid; a seal member 18 provided across the rotation shaft 14 and the body 11 at a position between the impeller 15 and the bearing 13; a fluid entry part 20 arranged to surround a circumference of the rotation shaft 14 in a region of the body 11 opposite to the impeller 15 across the seal member 18, and receiving the fluid entering from the seal member 18; and plural drain flow passages 21 extending outward of the rotation shaft 14 from the fluid entry part 20 and capable of exhausting the fluid of the fluid entry part 20 to outside of the body 11. |
