The invention relates to the field of aerospace, in particular to an automatic telescopic propeller blade which comprises a propeller hub and propeller blades, and the propeller blades comprise large propeller blades and small propeller blades which are of hollow structures; the large paddle and the small paddle are sleeved inside and outside and are in sliding fit; a limiting sealing structure is arranged at the joint of the tail end of the large paddle and the head end of the small paddle; a closed and communicated cavity is formed in the large paddle and the small paddle; a sealing plate is mounted at the free end of the small paddle through a connecting piece; an air valve is arranged on the sealing plate. The blade is of a hollow closed cavity structure, when the propeller does not rotate, the internal air pressure of the cavity of the blade is lower than the external air pressure, the blade is in a contraction state under the action of negative pressure, when the propeller rotates, the blade extends under the action that centrifugal force is larger than negative pressure suction force, and an additional control mechanism is not needed in the whole process; the automatic telescopic propeller blade is a complete automatic telescopic propeller blade, the small propeller blade slides out of the large propeller blade under the action of centrifugal force, the blade extends, and the length change of the propeller blade can be realized without an independent driving device.
本发明涉及航空航天领域,一种自动伸缩式螺旋桨叶片,包括桨毂和桨叶,桨叶包括中空结构的大桨叶和小桨叶;大桨叶和小桨叶内外套装,且滑动配合;大桨叶尾端与小桨叶首端衔接处设置限位密封结构;大小桨叶内部形成一个封闭且连通的腔体;小桨叶自由端通过连接件安装封板,封板上设置气阀。本发明叶片为中空的封闭腔体结构,当螺旋桨不转动时,桨叶腔体内部气压低于外部气压,利用负压作用,叶片处于收缩状态,当螺旋桨转动时,利用离心力大于负压吸力的作用,叶片伸长,全程无需额外的控制机构;本发明是一个完整的自动伸缩式桨叶,小桨叶受离心力的作用,从大桨叶内滑出,叶片伸长,不需要单独的驱动装置即可实现螺旋桨叶片的长短变化。
Automatic telescopic propeller blade
自动伸缩式螺旋桨叶片
2024-12-13
Patent
Electronic Resource
Chinese