关键词: 快速压缩机, 液压制动, 活塞回弹, 高压驱动系统, 液压缓冲系统

Abstract: In order to solve the common problems of piston springbacks in rapid compression machines using pneumatic drive and hydraulic brake,the structure optimization design of a high-pressure drive system and hydraulic buffer system for a rapid compression machine were studied herein.The results show that increasing the number of exhaust ports,which may reduce the resistances of power pistons and improve deflation processs of drive cylinder piston-sides, will be able to alleviate the piston springback to some extent.Meanwhile,the rapid establishment and release of oil in the driven sides of hydraulic buffer system are the crux of the piston springbacks.The structure optimization of hydraulic brake pistons and the adjustment of oil drain holes,which improve the adaptability of hydraulic brake pistons to various experimental conditions,may fundamentally solve the springback problems of hydraulic brake pistons in rapid compression machines.

Key words: rapid compression machine, hydraulic brake, springback of piston, high-pressure drive system, hydraulic buffer system