-
公开(公告)号：US5462242A
公开(公告)日：1995-10-31
申请号：US147851
申请日：1993-11-05
IPC分类号： B64C25/52
CPC分类号： B64C25/52 , B64C2025/325
摘要： An improved helicopter landing gear assembly to substantially increase useful service life. The crosstubes are constructed of a material that allows use of thicker crosstubes thereby reducing the operating stress in the crosstubes and helping to increase the fatigue life, while at the same time preserving the required energy absorption characteristics. The inside and outside of the crosstubes are shot peened to help increase the fatigue life. The crosstubes are formed in an unstable temper condition thereby reducing the stress that is induced into the part during formation, and thus helping to increase the fatigue life. The straps are connected to the crosstubes by fasteners located at the sides of the straps and closer to the neutral bending axis of the crosstube so that the fasteners and the fastener holes are subjected to lower stress levels. The combination of these improvements results in a substantially increased life of the landing gear assembly.
摘要翻译： 改进的直升机起降装置大大增加使用寿命。 交叉管由能够使用较厚交叉管的材料构成，从而降低了交叉管中的工作应力，并有助于增加疲劳寿命，同时保持了所需的能量吸收特性。 柱塞的内部和外部都经过喷丸处理以帮助增加疲劳寿命。 交叉管形成在不稳定的回火条件下，从而减少在形成期间被引入到部件中的应力，从而有助于增加疲劳寿命。 带子通过位于带束侧面的紧固件连接到交叉管，并且更靠近交叉管的中性弯曲轴线，使得紧固件和紧固件孔受到较低的应力水平。 这些改进的组合导致起落架组件的寿命显着增加。
-
公开(公告)号：US09073625B1
公开(公告)日：2015-07-07
申请号：US13024732
申请日：2011-02-10
摘要： A helicopter rotor yoke includes a composite laminate having a plurality of plies of fibers disposed in a polymeric matrix. The polymeric matrix includes a toughened polymer at one of a location or zone that experiences high strain levels during use of the rotor yoke.
摘要翻译： 直升机转子轭包括具有设置在聚合物基质中的多层纤维的复合层压体。 聚合物基质包括在使用转子轭时经历高应变水平的位置或区域之一处的增韧聚合物。
-
搜索结果
2 条记录 (耗时 0.011 秒)
