摘要
为解决某运载器伺服机构曲柄与发动机游机摆轴不锈钢连接螺钉"咬死"问题,通过对不锈钢材料在液氮深冷条件下的特性分析,提出了"液氮深冷"的拆卸方法。利用"液氮深冷"方法,实现了在发动机游机摆轴螺纹完好的情况下,顺利地将伺服机构曲柄连接螺钉分解下来,确保了某运载器的按时出厂,避免了重大经济损失的发生。
This paper studies the low-temperature mechanical properties of stainless steel at cryogenic conditions and offers a new liquid nitrogen cooling approach for thread galling on stainless steel fasteners.The liquid nitrogen cooling method has been applied to solve the thread galling problem in fastening screw which connected the servomechanism crank and the vernier engine on a launch vehicle.The screw was removed with full protection of the internal threads,which also protected the pendulous axis of the vernier engine.The application of the liquid nitrogen cooling method ensures the on-time completion of the launch vehicle,therefore avoiding potential economic loss.
作者
刘立新
柳海龙
吴洁
宋漪萍
Liu Lixin,Liu Hailong,Wu Jie,Song Yiping(Beijing Institute of Aerospace System Engineering, Beingjing 10007)
出处
《航天制造技术》
2018年第1期64-65,16,共3页
Aerospace Manufacturing Technology
关键词
液氮
深冷
不锈钢
螺钉
咬死
liquid nitrogen
cryogenics
stainless steel, screw~ thread galling
