| 摘要 |
PURPOSE: A scroll fluid machinery is provided to effectively cancel the thrust load applied to left/right rotating scrolls by a thrust offset shaft. CONSTITUTION: A scroll fluid machinery comprises a housing(1), two fixed scrolls(2), a transfer member(6), a cylindrical driven pulley(5), a thrust offset shaft(10), two rotating scrolls(3), and rotation prevention structure(30). The two fixed scrolls are respectively fixed to both sides of the housing and comprise a fixed wrap(21). The transfer member is connected to an external electric motor. The cylindrical driven pulley is arranged between two fixed scrolls in the housing and rotates around a first shaft by the electric motor through the transfer member. The thrust offset shaft rotates around a secondary shaft making eccentricity from the first shaft of the pulley. The two rotating scrolls rotate with the thrust offset shaft and forms a compression chamber between the fixed wrap and a rotating wrap(31) engaged by the rotation of the thrust offset shaft due to the rotation of the driven pulley. The rotation prevention structure prevents the rotating scroll from rotating around the second shaft when the thrust offset shaft rotates.
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