| 摘要 |
<p>Vanes 70 are pivotable about respective radial axes (75, Fig 3.1) so as to be transverse to the direction of motion 34 in a supply-duct part 54 from an inlet 31 to an outlet 32 of an annular duct 30 and to be parallel to the direction of motion 34 in a sealing-duct part 55 from the outlet 32 to the inlet 31 of the annular duct. The sealing-duct part 55 has a cross-section corresponding to the vanes when parallel to the direction of rotation 34 and is always sealed by at least one vane passing through it. At least one deflecting element 90.1 for pivoting the vanes is provided at the transition from the supply-duct part 54 to the sealing-duct part 55. In the region which makes contact with the deflecting element 90.1, the thrust face of the vane 70 has a surface contour 71 adapted to the shape of the control edge or face of the deflecting element.</p> |
