The invention belongs to the technical field of helicopter rotors, and discloses a helicopter main blade shimmy single-pendulum vibration absorption device which is installed at the root of a main blade through shell assemblies which are connected up and down, an inserting assembly is fixedly installed below the shell assemblies, and a swinging body capable of swinging horizontally is arranged on the inserting assembly. According to the scheme, the vibration absorption efficiency is high, and theoretically, after the vibration absorption frequency is matched with the rotor target shimmy load frequency, the target shimmy load can be reduced by 90% or above by adjusting the weight of the swing body; the weight cost is low: the weight of the swing body is not counted, the weight of a single structure is 2Kg, and the weight increment of the whole helicopter can be controlled within 0.5% after the helicopter is additionally provided with the device; the mode that a vibration absorption device is installed on a propeller hub in the past is adopted, and due to the fact that the vibration absorption device installed at the position is complex in structure and large in weight, the weight can be greatly reduced under the condition that the same effect is achieved through the novel shimmy damping structure.
本发明属于直升机旋翼技术领域,公开了一种直升机主桨叶摆振单摆吸振装置,通过上下连接的壳体组件安装在主桨叶根部上,插接组件固定安装在壳体组件的下方,插接组件上设有能够水平摇摆的摆动体。本发明的方案吸振效率高:理论上本发明的吸振频率与旋翼目标摆振载荷频率相匹配后,通过调整摆动体重量可降低目标摆振载荷90%以上;重量代价小:不计摆动体重量,本发明单件结构重量2Kg,直升机加装本发明后全机重量增重可以控制在0.5%以内;以往采用在桨毂上安装吸振装置的方式,由于此处安装的吸振装置结构复杂、重量大,因此采用本发明新的减摆结构可以在达到同样的效果下,重量大大减轻。
Helicopter main blade shimmy single-pendulum vibration absorption device
一种直升机主桨叶摆振单摆吸振装置
04.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |
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