| 摘要 |
PURPOSE:To protect rotation of a stator against trouble due to heating by rotating the rotary stator through sliding on the sliding face or the bearing face or through rolling balls. CONSTITUTION:A bearing 50 having a bearing face 57 is secured to the outer circumference of a rotary stator 12A. A bearing 51 has a centrifugal bearing face 58 arranged on the inner circumferential face of a machine frame facing with the rotary stator 12A. A ball bearing is placed between the centripetal bearing face 57 of the bearing 50 and the centrifugal bearing face 58 of the bearing 51. Consequently, the rotary stator 12A rotates concentrically with a rotor. Even if the face bearing expands due to heating or abnormal temperature rise, the gap between the faces 57, 58 enlarges and influence of expansion onto the face bearing can be neglected. |
