| 摘要 |
<p>PURPOSE:To prevent lubricating fluid from deteriorating by providing a sealing means between a main body casing and a bearing member, making it possible to interpose lubricating fluid between a rotary member and the bearing member, and making it possible to lead the bearing member on outer portion than the sealing means out in the atmosphere. CONSTITUTION:A casing 1 is arranged with a rotary shaft 3 in an axial hole 2, and bottom end opening portion is closed with a bearing member 4 constituted with material of good thermal conduction and provided with a permanent magnet 5 and magnetic material pole pieces 6. Meanwhile, on bottom face of the casing 1, is attached a circular magnet 8, which absorbs and holds the bearing member 4 via balls 9 while holds magnetic fluid 11. Therefore a bottom face and a side face of the bearing member 4 are led out outward, and can be cooled under the atmosphere, thereby deterioration of the lubricating fluid 11 can be prevented, and usage attitude can be chosen relatively freely while stable pump performance can be realized.</p> |
