| 摘要 |
Rotary devices for processing compressible fluids are disclosed, including compressors, vacuum pumps, expanders and internal combustion engines. The devices comprise first and second elements rotatable relative to each other about an axis of rotation. An elongate cavity of varying cross sectional area is defined around the axis of rotation between surfaces of the first and second elements, the first element having at least one slot formed therein at different angular positions. A cavity separating arrangement projects into the cavity in various places to separate the cavity into adjacent working portions, the volumes of which vary as the first and second elements rotate relative to each other. In various different cross sections of the cavity, dimensions of the cavity in perpendicular directions of the cavity both vary. In some devices, an aspect ratio of various different cross sections of the cavity remains within given limits. In some embodiments, cross sections of the cavity corresponding to maximum compression are circular, part-circular, tapered or square in shape. |
