Composite propeller blade of propeller

Abstract

The invention discloses a composite propeller blade of a propeller. A circular truncated cone I, a cylinder I, a circular truncated cone II, a transition cylinder II and a curved surface consistent with a propeller body molded surface in bending are sequentially arranged at the small end of a metal propeller root from the back of a tail end cylinder of a large end; an oval end protruding from thecenter of the large end of the foam core matched with the bent shape of the propeller body is inserted into an oval groove in the center of the small end of the metal propeller root; the starting endsof the carbon beams are tightly attached to and wrap the circular truncated cone I, become two parts from the curved surface and are laid along rectangular grooves in the working surface and the non-working surface of the foam core; the skin wraps the curved surface of the metal propeller root and all parts of the propeller body from the transition cylinder II; the front edge filling foam and therear edge filling foam are filled in front edge and rear edge gaps between the skin and the metal propeller root; and the carbon fiber cloth is filled in the skin, the carbon beam and the foam core and all gaps among the skin, the carbon beam and the foam core, and the carbon beam winding belt is wound on the carbon beam portion without skin wrapping. The composite propeller blade disclosed by the invention is light in weight, reliable in structure, excellent in aerodynamic performance and good in paddle root fatigue resistance.

Description

technical field [0001] The invention relates to a propeller composite material blade. Background technique [0002] Existing propeller composite material blades are composed of metal petioles and composite materials wrapped outside the metal petioles. The skins are all wrapped with carbon beams and metal blade roots. There is no foam filling and carbon fiber cloth inside the skin. The shape of the blade root is The aerodynamic performance is low, and there are too many layers on the metal blade root, which is poor in workmanship and prone to defects, and the weight of the blade is heavy. The connection between the petiole and the foam core is V-shaped, the connection between the foam core and the petiole is weak, and it is not easy to locate. The carbon beam layup is not ideal, resulting in poor consistency of the blade after molding and poor bearing capacity of the blade. Propeller blades require good aerodynamic performance, good structural reliability and safety, light w...

AI Technical Summary

Problems solved by technology

[0002] Existing propeller composite material blades are composed of metal petioles and composite materials wrapped outside the metal petioles. The skins are all wrapped with carbon beams and metal blade roots. There is no foam filling and carbon fiber cloth inside the skin. The shape of the blade root is The aerodynamic performance is low, there are many layers on the metal blade root, the workmanship is poor, and defects are prone to occur, and the weight of the blade is heavy

The connection between the petiole and the foam core is V-shaped, the connection between the foam core and the petiole is weak, it is not easy to locate, and the carbon beam layup is not ideal, resulting in poor consistency of the blade after molding, and poor bearing capacity of the blade

Propeller blades require good aerodynamic performance, good structural reliability and safety, light weight, good design manufacturability, low scrap rate, etc. Existing composite material blades cannot meet these requirements

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