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    • 10. 发明授权
    • Thrust reversal system
    • 推力反转系统
    • US4484439A
    • 1984-11-27
    • US285224
    • 1981-07-20
    • Victor SingerDonald V. LushisThomas J. Kirschner, Jr.
    • Victor SingerDonald V. LushisThomas J. Kirschner, Jr.
    • F02K9/92F02K1/58
    • F02K9/92
    • A thrust reversal system for reducing, neutralizing and/or reversing the thrust vector resultant of a solid propellant rocket motor utilizes a movable conical piston or plenum cover that fits over a plurality of small ports that are arranged in a circumferential band around the aft dome of the rocket motor. Before actuation, the cover seals the ports. When actuated, the cover is retracted aft a pre-set distance to uncover the ports, shock and the stroke time being controlled by a shock absorber which in one embodiment of the invention is of the hydraulic type and in other embodiments is of the mechanical type. The cover becomes a baffle which directs the combustion chamber gas exiting the ports outward and forward. Suitable control of the flow characteristics may be exercised by the setting of the travel distance of the piston cover and the number, size and orientation of the ports. The time to reach a negative thrust vector can be reduced by increasing the size of the hydraulic fluid control orifice or by the use of high rate stroke mechanical shock. The amount of reverse thrust may be increased by optimizing the reversal port area and the reversal nozzle angle.
    • 用于减少,中和和/或反转固体推进剂火箭发动机的推力矢量结果的推力反转系统利用可移动的锥形活塞或增压罩,该可移动的锥形活塞或增压罩安装在多个小孔口周围, 火箭发动机。 在致动之前,盖子密封端口。 当被致动时,盖子被预先设置的距离缩回到预定的距离以露出端口,冲击和行程时间由减震器控制,在本发明的一个实施例中是减震器,在其它实施例中是机械式的 。 盖板成为导向从外部向前和向前排出的燃烧室气体的挡板。 流量特性的适当控制可以通过设定活塞盖的移动距离和端口的数量,尺寸和方向来实现。 可以通过增加液压流体控制孔的尺寸或通过使用高速冲程机械冲击来减小达到负推力矢量的时间。 通过优化反向端口面积和反转喷嘴角度可以增加反向推力的量。