| 摘要 |
<p>There is described a propeller (1) of the type comprising an external cylindrical casing (2) coupled directly or indirectly to an engine shaft in a manner rotatable about the axis (X) of the propeller, and at least one blade (3) provided with at least one fluid dynamic surface (4) constrained to a related blade shaft (5), which is in turn constrained to said external cylindrical casing (2) to be driven in rotation about the axis of the propeller. The blade shaft (5) has its axis (Y) which extends in a direction incident to the axis (X) of the propeller and the at least one fluid dynamic surface is driven by the related blade shaft in rotation about the axis of the propeller. The propeller is characterized by comprising at least one guide constraint (11, 12) between the at least one fluid dynamic surface (4) and the respective blade shaft (5), said at least one guide constraint comprising at least one first section (11a) and at least one second section (11b). The at least one first section (11a) is shaped to allow the translation or the roto-translation of the fluid dynamic surface (4) relative to the blade shaft (5), and vice versa, and the at least one second section (11b) is shaped to allow the roto-translation of the fluid dynamic surface (4) relative to the blade shaft (5), and vice versa.</p> |
