| 摘要 |
A displacement machine for compressible media comprising a displacement compartment bounded by an inwardly situated spiral-shaped side wall and an outwardly situated spiral-shaped side wall, the displacement compartment describing a span angle which exceeds 360 DEG and extends from an inlet to an outlet. The displacement compartment is provided with a displacement element which carries out a circulatory movement relative to the displacement compartment and likewise possesses the shape of a spiral and has practically the same span angle as the displacement compartment. The displacement element, during the course of the circulatory movement, always contacts both the outer situated side wall and the inner situated side wall at least at one respective advancing contact line. A pole of a first section, spanning approximately 360 DEG both of the displacement compartment and the displacement element is off set from a pole of a likewise spiral-shaped second section which uniformly merges at the inner end of this first section by an amount which is smaller than the mean radius of curvature at the inner end of the aforementioned first section. |
