| 摘要 |
PROBLEM TO BE SOLVED: To prevent abrasion and galling from being generated between a fixed scroll and a rotary scroll and to enhance a compression performance. SOLUTION: Fixed scrolls 6A, 6B are axially movably provided in scroll accommodation cylinder parts 5A, 5B of a casing 1. Pressure chambers 34A, 34B positioned between the casing 1 and fixed scrolls 6A, 6B and introducing an intermediate pressure in compression chambers 32A, 32B are provided at back surface sides of the fixed scrolls 6A, 6B. Restriction members 36A, 36B are provided on the scroll accommodation cylinder parts 4A, 4B of the casing 1. When the fixed scrolls 6A, 6B are axially moved by the pressure chambers 34A, 34B at the time of driving, the fixed scrolls 6A, 6B are butted to the restriction members 36A, 36B. At this state, the fixed scrolls 6A, 6B and the rotary scrolls 27A, 27B are maintained in the non-contact state in a thrust direction.
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