| 摘要 |
A scroll type fluid displacement apparatus comprises a housing having a front end plate and at least one hole formed on an inner surface thereof, a fixed member attached to the housing, an orbiting ring assembly including an orbiting member having an end plate from which an annular member extends, and an orbiting ring fastened to an axial end surface of said end plate of said orbiting member. The orbiting member has at least one hole formed on the axial end surface thereof. The scroll type fluid displacement further comprises a fixed ring assembly attached to the housing, including a fixed ring fastened to an inner surface of the housing facing the orbiting ring of the orbiting assembly. Each of the fixed and orbiting rings have a plurality of corresponding pockets, each pocket on the fixed ring facing a pocket on the orbiting ring of approximately the same size, pitch, and radial distance, and at least one opening formed in each of said fixed and orbiting rings. A rotation preventing and thrust bearing means is connected to the orbiting assembly for carrying axial loads from said orbiting assembly and preventing the rotation of said orbiting assembly, so that at least one line contact moves toward a compressor discharge side during orbital motion. The rotation preventing and thrust bearing means further includes a plurality of bearing elements, one each being placed within each pair of facing pockets. The corresponding pockets including a predetermined number of rotation preventing pockets on each of the fixed and orbiting rings for interacting with the bearing elements to prevent rotation of the orbiting member during orbital motion. Each of at least one hole of the inner surface of the housing and at least one hole in the axial end of the orbiting scroll member has a diameter smaller than that of each of said at least one opening of the fixed ring and said at least one opening of the orbiting ring, such that the eccentric relationships between the centers of said openings can be measured with respect to the centers of said holes. The rotation preventing and thrust bearing means can then be assembled using a fixed ring assembly and an orbiting ring assembly which have the same or substantially similar eccentric characteristics.
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