The invention discloses a helicopter rotor variable pitch pull rod with an active vibration reduction mechanism, and relates to the field of active vibration reduction. The problem that a traditional variable-pitch pull rod can only process noise or vibration in a specific flight state is solved. The variable-pitch pull rod comprises an upper pull rod, an outer sleeve, a lower base and a lower pull rod which are fixedly connected in sequence from top to bottom, the outer sleeve comprises a main body part, a spring part and a lower connecting part which are fixedly connected in sequence from top to bottom, an inner core shaft penetrates through the main body part, and the bottom end of the inner core shaft is fixedly connected with the lower connecting part; a groove communicating the inside and the outside of the main body part is formed in the main body part, the active vibration reduction mechanism is arranged perpendicular to the axial direction of the outer sleeve and surrounds the outer sleeve, the pressure on the outer wall of the main body part is adjusted through the active vibration reduction mechanism, and then the friction force between the main body part and the inner core shaft is changed and adjusted. Vibration reduction of the helicopter in different flight states is achieved by periodically changing the rigidity of the variable pitch pull rod, the vibration reduction effect is good, and the application range is wide.
本发明公开了一种具有主动减振机构的直升机旋翼变距拉杆,涉及主动减振领域。解决了传统变距拉杆只能在特定的飞行状态下处理噪声或振动的问题。变距拉杆包括从上到下依次固定相连的上拉杆、外套筒、下底座以及下拉杆,外套筒包括从上到下依次固定相连的主体部、弹簧部以及下连接部,在主体部之内贯穿有内芯轴,内芯轴的底端固定连接下连接部;在主体部上开设有连通主体部内外的槽,主动减振机构垂直于外套筒的轴向设置,并且环抱外套筒,通过主动减振机构调节对主体部外壁的压力大小,进而改变调节主体部和内芯轴之间的摩擦力大小。通过周期性地改变变距拉杆的刚度实现直升机在不同飞行状态下的减振,减振效果好、适用范围广泛。
Helicopter rotor variable pitch pull rod with active vibration reduction mechanism
一种具有主动减振机构的直升机旋翼变距拉杆
2023-07-18
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
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