Scroll fluid machine
AssigneeAnest Iwata Corporation
InventorsTamotsu FUJIOKA, Atsushi UNAMI
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Abstract
A seal groove is cut in the distal end face of a wrap of a fixed scroll, with a tip seal being fitted in the seal groove. Swelling members are interposed between both side faces of the tip seal and corresponding opposite side faces of the wrap. Condensed liquid of working medium w and water condensed from steam contained in the working medium w that are present between the tip seal and an end plate provide a sealing effect. When the swelling members swell upon absorbing the condensed liquids, they exert a strong pressing force on the tip seal and the wrap, thereby firmly retaining the tip seal in position. This prevents the tip seal from being pressed against the end plate, so that wear of the tip seal is reduced.
Claims7
A scroll fluid machine, comprising:
- a pair of scrolls, each having an end plate and a spiral wrap provided to stand on the end plate and disposed such that a distal end face of the wrap faces the opposite end plate to form a sealed chamber between the scrolls;
- a seal member inserted in a seal groove formed in the distal end face of the wrap to provide a seal between the distal end face and the opposite end plate;
- and
- a swelling member interposed between the seal member and a side face of the seal groove facing the seal member, the swelling member swelling upon absorbing a liquid in the sealed chamber to press the seal member toward an opposite side face of the seal groove.
Dependencies are inferred from the claim text.