摘要
为实现液压弹射,提出一种液压动力系统技术方案,主要由高速液压缸、活塞式蓄能器、主阀和伺服阀组成。设计了新型液压缸缓冲结构,以避免液压缸活塞运动行程末端产生强烈的撞击与振动。论述了系统工作原理和设计方法,建立了系统的数学模型,采用数字仿真的方法对弹射和缓冲过程的特性进行了理论研究,并与实验数据对比且基本吻合,结果表明:动力系统能够在70 ms时间内使液压缸活塞运动速度达到7 m/s,在12 mm液压缸活塞缓冲行程内达到95%的缓冲效率。
A hydraulic power system design was proposed to achieve a hydraulic catapult, which mainly consists of a high-speed hydraulic cylinder, a piston accumulator, a main valve and a servo valve. An ingenious cylinder cushion structure was designed to avoid strong shock and vibration at the stroke end of hydraulic cylinder piston. The system working principle and design method were discussed. Then a system mathematical model was established, and the characteristics of the catapult and cushion process were further investigated through numerical simulation. Theoretical results were finally compared with the experimental ones, and it was found that they are in agreement. The results show that the moving speed of hydraulic cylinder piston is up to 7 m/s within 70 ms, and the cushion efficiency reaches 95% within 12 mm cushion stroke of hydraulic cylinder piston.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2013年第4期459-464,共6页
Acta Armamentarii
基金
浙江省科技厅重大科技专项重点工业项目(2011C11059)
关键词
自动控制技术
液压弹射
高速液压缸
缓冲过程
automatic control technology
hydraulic catapult
high-speed hydraulic cylinder
cushion process
