| 摘要 |
A cover disk (1) for a closed rotor of a radial flow machine or diagonal flow machine for defining a flow channel has a wall thickness which has a local maximum along the profile mean line of the meridional cross section of the cover disk between a first front side (2) and a second front side (3) of the cover disk. An outer surface (1.2) of the cover disk remote of the flow channel has in the area of this local maximum a convex curvature with a radius (R2.2) whose ratio (R2.2/D2) to an outer diameter (D2) of the rotor is within a range of 0.05 to 0.5 (0.05@R2.2/D2@0.5).
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