摘要
离心过载试验装置可在地面重复再现火箭发动机飞行过程的高过载环境,通过对发动机试验状态进行控制和监测,可为高过载发动机流场及热结构研究提供实时数据。为模拟发动机点火飞行受力工况,试验装置不仅须承载发动机点火产生的巨大冲击振动,还要为发动机提供安装和姿态调整平台。为此,对试验装置采用分层布局,除转臂外,其余各系统布置于地下空间,转臂上的元器件进行了防护,以防发动机点火产生的高温和高温物质对其损伤。转臂采用箱型焊接不等臂结构和较高的安全裕度,通过优化设计,降低了转动惯量。为实现各型发动机安装和姿态调整,在转臂上开发了无级角度调整旋转舱。传动系统作为转臂的支承和传力结构,采用大轴径和大锥度增强系统承载能力,并通过预埋件与土建基础固连,提高主机抗倾覆力能力。驱动系统采用同步电机直接驱动,以提高试验装置快加速和变过载加载能力。最后,对主机结构进行了力学分析和振动测试,结果表明,设计结构可保证试验装置稳定运行。
The centrifugal overload test device can simulate the high-overload environment repeatedly on the ground when the rocket motor is running.The high-overload motor,with its test state under control,is able to provide in-time data on both the flow field and the thermal structure.In order to simulate the working conditions of the rocket motor's ignition flight,the test device not only bears the huge ignition-led impact vibration,but also provides a platform for motor installation and attitude adjustment.Thus,the layered layout of the test device is adopted.Except the swing arm,the other systems are arranged in the underground space.The components on the swing arm are protected,in order to prevent the rocket motor from being damaged by high temperature and those high-temperature materials generated by ignition.The swing arm adopts an asymmetric box-shaped welded structure and enjoys a high standard of safety margin,and the moment of inertia is reduced with the aid of optimal design.For the purpose of installation and attitude adjustment for all types of rocket motor,a stepless angle-adjustment rotating carriage is developed on the swing arm.As the support and transmission structure of the swing arm,the transmission system with large diameter and large taper enhances the load-bearing capacity,and the test device which is firmly connected to the civil foundation by means of the embedded parts improves its anti-overturning ability.The drive system is directly driven by the synchronous machine,so that the test device will ensure the rapid acceleration and improve its variable-overload loading ability.Finally,both the mechanic analysis and the vibration test are conducted on the mainframe structure.The results show that thanks to the structure,the test device runs steadily and smoothly.
作者
冉光斌
宋琼
余绍蓉
刘仕钊
陈文颖
RAN Guang-bin;SONG Qiong;YU Shao-rong;LIU Shi-zhao;CHEN Wen-ying(Institute of Systems Engineering,CAEP,Mianyang 621999)
出处
《机械设计》
CSCD
北大核心
2020年第5期68-73,共6页
Journal of Machine Design
关键词
固体火箭发动机
试验装置
高过载
转臂
旋转舱
solid rocket motor
test device
high overload
swing arm
rotating carriage
