| 摘要 |
The invention relates to axial securing means for impeller blades (10) of turbo generators with axial passage. In said generators the impeller blades (10) are secured radially and in a peripheral direction by means of a blade root (12) that is axially inserted into a radial groove (14) of a blade support (16). The axial securing means (20) have a securing body (22) with a first axial end region (26, 26') and a second axial end region (28), which are interconnected by a connection region (30), whereby the first end region (26, 26') engages behind a front face (32) of the blade root (12) and a front face (30) of the blade support (16) on the flow exit side and the second end region (28) engages behind a front face (34) of the blade support (16) on the flow entry side. Said end regions (26, 26', 28) help to secure the blade (10) against axial forces that originate from the flow and act from the flow entry side in the direction of arrow (A). A spring element (38) is configured in the connection region (36), said element when installed exerting a radial force between the blade root (12) and the base (15) of the radial groove. The force is sufficient to secure the impeller blade (10) in its axial position against axial forces exerted in the entry direction (B) of the flow.
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