| 摘要 |
A rotary machine for a compression or an expansion of a gaseous working fluid comprises a machine housing (10), a rotor (11) which is rotatably mounted within said housing and which, in its peripheral outer surface, is provided with at least one helically extending groove (14), having a depth varying along its length and serving as a flow passage for the working fluid, and a rotatable separation wheel (15) which is provided with a number of blades (17), evenly distributed in the circumferential direction of said wheel and serving as separation elements, successively insertable into the groove (14) of the rotor (11) and arranged to divide the groove (14) into a number of working chambers which follow one after the other in the longitudinal direction of the groove and which, during coordinated simultaneous rotation of the rotor (11) and the separation wheel (15), are brought to move along the groove (14) in the longitudinal direction thereof while successively changing their volume. The wheel blades (17) have peripheral edge portions (26), having an acute-angled wedge-shaped profile and terminating in thin sealing edges (27), moveable along the walls of the groove (14) and located at least approximately flush with the main surfaces (25) of the wheel blades (17), located at the high-pressure sides of the wheel blades (17).
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