| 摘要 |
PURPOSE:To make it possible to prevent an abrasion and seizing of a bearing, by rotating a member which makes a motor side rotary part eccentric with respect to a crank shaft so that uneven contact of the bearing is reduced by magnetically absorbing force. CONSTITUTION:The total pressure P1 of fluid in a closed space defined between both scrolls 2, 3 acts on the crank part 9b of a crank shaft 9 through a slide bearing. Simultaneously, magnetic absorbing force is generated in a rotor 13 accompanied with non-uniformity of the air-gap of a motor due to that the rotor 13 is made eccentric with a main bearing part as well a stator 19, and acts on the fixed part 9c of the crank shaft. In this stage, P1 due to the fluid pressure and F due to magnetic force act in the same direction, and therefore, uneven contact of the bearing part is reduced, thereby no abrasion and seizing of the bearing are brought about. |
