Importance

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Abstract

In a displacement machine for compressible media, having a delivery space (6) which is delimited by spiral-shaped peripheral walls (8, 9) extending perpendicularly from a side wall and leads from an inlet (2) outside the spiral to an outlet (3) inside the spiral, and having a spiral-shaped displacement body (5) which projects into the delivery space (6) and is mounted with respect to the delivery space so as to execute a rotary, twist-free movement, the center (10) of said displacement body is offset eccentrically relative to the center (11) of the peripheral walls (8, 9) in such a way that the displacement body (5) at all times almost touches both the outer and the inner peripheral wall (9 and 8 respectively) of the delivery space (6) at in each case at least one advancing sealing line. The sealing line at the inlet-side end of the outer peripheral wall (9) is advanced relative to the 0.degree./360.degree. position by an angle (.alpha.) between 5.degree. and 50.degree., the peripheral wall (9) forming a circular arc (9') in this angle region.

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First Claim