| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiraxial screw fluid machine in two-stage construction while maintaining a conventional whole geometry, allowing the formation of an axial flow in suction to discharge processes for higher vacuum and lower final discharge temperature. SOLUTION: A two-stage spiraxial screw fluid machine comprises a shielding wall fitting groove provided at the midway of the total length of a rotor, in which a shielding wall is mounted to form a first-stage stroke ranging up to the shielding wall and a second-stage stroke ranging from the shielding wall up to the final end of a rotor. Two-stage construction is thus achieved while maintaining the same geometry as conventional, permitting higher vacuum and lower discharge temperature than conventional.
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