Small space tether system unfolding brake mechanism adopting spinning shaft sleeve

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Small space tether system unfolding brake mechanism adopting spinning shaft sleeve

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WANG CHANGQING / SUN PEIJIE / LI AIJUN / GUO YONG / YANG SHU

The invention discloses a small space tether system unfolding brake mechanism adopting a spinning shaft sleeve, and belongs to the technical field of space tether system equipment. The small space tether system unfolding brake mechanism comprises a small instrument cabin, and a spinning brake, a tether spool core, a tether calibration device, a high-strength tether, an unfolding length measurement module and an ejection module which are arranged in the small instrument cabin, the small instrument cabin is fixed on a mother satellite of the space tether system; the spinning brake restrains the axial displacement of the spinning shaft sleeve through the elastic force of a spring in the spinning brake, so that the unfolding motion of the high-strength tether is braked until the speed is zero; the tether spool core is used for winding a tether, and the unfolding length measuring module is used for guiding the tether and measuring the length and the speed of the tether; and the ejection module is used for control and signal processing of the whole mechanism. The elastic force of the compression spring is changed by changing the thread screwing length of the spinning brake, rotation of the spinning shaft sleeve along threads is restrained, and therefore the braking speed reduction effect of the tether is changed; the braking mechanism is effective in framework damping, low in space occupancy rate and reliable in release.

本发明一种采用旋压轴套的小型空间系绳系统展开制动机构，属于空间系绳系统设备技术领域；包括小型仪器舱及设置于其内的旋压制动器、系绳线轴轴芯、系绳校准装置、高强度系绳、展开长度测量模块和弹射模块；小型仪器舱固定于空间系绳系统的母星上；旋压制动器通过其内弹簧的弹力抑制旋压轴套的轴向位移，进而对高强度系绳的展开运动进行制动直到速度为0；系绳线轴轴芯用于缠绕系绳，展开长度测量模块用于系绳的导向和长度、速度测量；弹射模块用于整个机构的控制和信号处理。本发明通过改变旋压制动器的螺纹旋合长度以改变压缩弹簧的弹力，抑制旋压轴套沿螺纹旋转，从而改变系绳的制动减速效果；制动机构架构阻尼有效，空间占用率低，释放可靠。