| 摘要 |
PROBLEM TO BE SOLVED: To reduce mechanical friction loss in a main bearing part and facilitate insertion and assembly work of a rotor shaft and thereby to improve assembly accuracy. SOLUTION: A sealed vessel 6 having a cylindrical casing of a scroll fluid machinery houses therein: a compression mechanism part 12 having a fixed scroll 7 and a swirl scroll 8; a drive part 17 having a rotor 14 for driving the swirl scroll, and a stator 13; a rotor shaft 11 constituted integrally with the rotor and connected to the swirl scroll; the main bearing 16 disposed between the rotor and a scroll mechanism part to support the rotor shaft; and an auxiliary bearing 19 disposed to an opposite side of the main shaft with sandwiching the rotor therebetween. The auxiliary bearing is attached to the casing through a support member 21 having a circular guide face 21a. The relationship of Dr<Di<Ds is satisfied when an inside diameter of the guide face of the support member is Di, an inside diameter of the stator is Ds, and an outside diameter of a rotor is Dr. COPYRIGHT: (C)2005,JPO&NCIPI
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