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Invention Grant
US07984873B2 Retraction cylinder and rotorcraft undercarriage furnished with such a retraction cylinder 有权
回缩缸和旋翼航空器底盘装有这样的回缩缸

Retraction cylinder and rotorcraft undercarriage furnished with such a retraction cylinder
Abstract:
A retraction cylinder (20) makes it possible to retract a leg (10) of a rotorcraft landing gear, the retraction cylinder (20) comprising a retraction chamber (33) and an extension chamber (34) separated by a head (26) of a piston (25), the piston (25) sliding in a cylindrical sheath (35). In addition, the retraction cylinder (20) comprises a return element (23) and a control chamber (22) furnished with a first fluid, this control chamber (22) being separated from the return element (23) by a movable release member (24), the movable release member (24) sliding so that the retraction cylinder (20) fulfils a damping function when a control pressure exerted by the first fluid on the movable release member (24) is greater than a return pressure exerted by the return element (23).
Abstract(Chinese):

缩回气缸（20）使得可以缩回旋翼飞机起落架的腿部（10），缩回气缸（20）包括收缩室（33）和由头部（26）分开的延伸室（34） 活塞（25），所述活塞（25）在圆柱形护套（35）中滑动。 此外，回缩缸（20）包括具有第一流体的返回元件（23）和控制室（22），该控制室（22）通过可移动释放构件与返回元件（23）分离 24），当由第一流体施加在可移动释放构件（24）上的控制压力大于由返回件施加的返回压力时，可移动释放构件（24）滑动使得缩回缸（20）履行阻尼功能 元件（23）。

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