The invention discloses a composite material propeller blade root. The paddle root comprises a paddle root outer sleeve and a concave paddle root inner sleeve, wherein the paddle root inner sleeve is fixed inside the paddle root outer sleeve through screw joint and/or glue joint; a double-inverted-wedge cavity is formed between the paddle root inner sleeve and the paddle root outer sleeve and is used for inserting a composite material layer consisting of a paddle main bearing beam and a skin material; the double-inverted-wedge cavity sequentially comprises an inner concave area, a platform area and an outer expansion area from the root to the outside, and the tail ends of the paddle root inner sleeve and the outer expansion area are filled with light soft rubber which is used for gap compensation and prevention of collapse of the composite material layer. The double-inverted-wedge cavity of the propeller root and the composite material layer form an anti-pull-off structure, when the propeller rotates, the centrifugal force of the propeller can be transmitted through the bonding interface of the propeller blades and the propeller root and can also be transmitted through the inverted-wedge-shaped structure, the connectivity of the roots of the propeller blades is improved, and meanwhile the service life of the propeller blades is prolonged. And the stability and the reliability of the propeller during high-speed rotation are enhanced.
本发明公开了一种复合材料螺旋桨叶片桨根。该桨根包括桨根外套和内凹式桨根内套,桨根内套通过螺接和/或胶接固定于桨根外套内部;所述桨根内套与桨根外套之间设有双倒楔空腔,用以插入桨叶主承力梁和蒙皮材料组成的复合材料层;所述双倒楔空腔由根部向外依次为内凹区、平台区和外扩区,在桨根内套与外扩区的尾端处填充有轻质软胶,用于空隙补偿和防止复合材料层塌陷。本发明所提供桨根的双倒楔空腔与复合材料层形成防拉脱结构,在螺旋桨旋转时,螺旋桨离心力既可通过桨叶与桨根的粘接界面进行传递,又可以通过倒楔形结构进行传递,在提高了螺旋桨叶片根部的连接性的同时,还增强了螺旋桨高速旋转时的稳定性和可靠性。
Composite material propeller blade root
一种复合材料螺旋桨叶片桨根
2024-02-02
Patent
Electronic Resource
Chinese
Propeller blade or airfoil with root wound with composite material
European Patent Office | 2024
|