| 摘要 |
The invention relates to a cover disk (1) for a closed impeller of a radial or diagonal turbomachine for the definition of a flow channel, having a wall thickness that has a local maximum along the profile center line of the meridian cross-section of the cover disk between a first and a second front (2, 3) of the cover disk, wherein an outer surface (1.2) of the cover disk facing away from the flow channel has a convex curvature with a radius (R2.2) in the region of said local maximum, the ratio (R2.2/D2) of which to an outside diameter (D2) of the impeller is in a range of 0.05 to 0.5 (0.05 = R2.2/D2 = 0.5). |
