基于超声振动锯割技术的固体发动机燃烧室解剖方法  

Dissection method for SRM's chamber based on the ultrasonic vibration sawing

作　　者：郭宇 申志彬[1,2] 李海阳 张漩[3] 卞云龙 GUO Yu;SHEN Zhibin;LI Haiyang;ZHANG Xuan;BIAN Yunlong(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha410073,China;Hunan Key Laboratory of Intelligent Planning and Simulation for Aerospace Missions,Changsha410073,China;The 41st Institute of the Sixth Academy of CASIC,Huhhot010010,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]空天任务智能规划与仿真湖南省重点实验室,长沙410073 [3]中国航天科工集团有限公司六院四十一所,呼和浩特010010

出　　处：《固体火箭技术》2021年第6期800-805,共6页Journal of Solid Rocket Technology

基　　金：国家自然科学基金资助项目(11872372);国防科技大学科研计划资助项目(ZK17⁃02⁃06)。

摘　　要：全面解剖和原位取样是获取发动机贮存性能及其分布最直接、最可信的方式,但由于发动机药柱是火化工产品,机械切割过程存在严重安全隐患。金刚石丝超声振动锯割具有适用材料广、切削力小、切割精度高、切缝窄、切割温升低的技术特点,具备发动机全面解剖的潜在技术应用前景。在分析非金属壳体发动机燃烧室主要材料物理特性的基础上,首先开展了以红外测温温度为控制参数的4参数正交试验研究,初步确定了壳体安全切割工艺参数;然后利用埋入式微型热电偶测量固体推进剂方坯内部切割温度,校核了上述切割工艺参数;然后,通过模拟发动机燃烧室一体化锯割试验,进一步验证了方法的安全性,最后,对贮存18年后的大型发动机燃烧室实施了安全切割。结果表明,该切割方法解剖非金属壳体发动机燃烧室具有高效和安全的优点,有望应用于复合材料壳体发动机寿命研究工程实践。The dissection and in⁃situ sampling are authentic and direct methods for studying storage life of solid rocket motor(SRM)combustion chamber.As an explosive device,the chamber cutting was very dangerous.Due to the unique characteristics of wide application ranges of materials,small cutting force,high cutting precision,narrow slot and low cutting temperature rising,the ultrasonic vibration sawing of diamond wire displays a potential prospect in whole SRM dissection.Based on the analysis of the main material physical characteristics of nonmetallic case chamber,the safety saw technological parameters were firstly obtained by means of four factors orthogonal case cutting test with infrared temperature measurement,which were further checked by thermoelectric couple inner temperature monitoring in propellant block cutting.Furthermore,the safety was verified by the simulate camber integral sawing.Finally,a large SRM combustion chamber which had been stored for 18 years was cutting into fragments quickly and safely.The results show that the ultrasonic vibration sawing is a safety and efficient integrated cutting method for dissection the chamber,which demonstrates potential for the storage life investigation of SRM composite case in engineering practice.

关 键 词：固体发动机 燃烧室解剖 超声振动切割 锯割 贮存寿命 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]