Patent ID: 9045986
Filing Date: 2015-06-02
Classification: B29D,B64C,F01D

Abstract:
1. A rotor blade provided with an outer covering and with at least one load take-up spar associated with at least one pin-receiving bushing, the spar extending spanwise from an attachment zone towards a distal zone, the attachment zone of the spar having the at least one pin-receiving bushing of the spar passing therethrough, wherein the spar is a compartmentalized spar comprising centrifugal force take-up means incorporated within a twisting stress take-up casing, the centrifugal force take-up means comprising at least two boxes, each box having the pin-receiving bushing of the spar passing therethrough, each box forming a compartment of a spar, each box including a closed retention belt extending in the spanwise direction of the blade, the retention belt of one box of the spar surrounding the retention belt of another box of the spar, each retention belt being provided with unidirectional fibers wound around the pin-receiving bushing, the casing being provided with inclined fibers presenting an angle relative to the unidirectional fibers.