软密封液压锁设计改进  

Improved Design of Soft Sealing Hydraulic Lock

作　　者：何寥 陈建有[1] 张宏宇[1] 郭建伟[1] 付曙光[1] HE Liao;CHEN Jian-you;ZHANG Hong-yu;GUO Jian-wei;FU Shu-guang(Beijing Institute of Space Launch Technology,Beijing 100076,China)

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《液压气动与密封》2017年第3期46-48,共3页Hydraulics Pneumatics & Seals

摘　　要：液压锁是实现液压执行机构位置保持的常用元件,软密封液压锁阀口密封垫易受高速射流冲击而损坏,该文通过Fluent对软密封液压锁阀口处流场进行仿真分析,得出影响阀口射流速度最显著因素为阀口遮盖量,其次为阀口导流角度。根据仿真结果提出阀口优化改进措施并进行了试验验证,解决了软密封液压锁射流损伤问题,为液压锁结构设计提供指导。The hydraulic lock is a common component for position holding of hydraulic actuators, while its soft seals tend to crack under high-velocity jet flow around the valve ports. The flow field simulation around the valve port was conducted by Fluent and it was concluded that the overlap of the valve port was the dominant factor affecting the jet flow velocity on the sealing surface with the guiding angle as the second important factor. The adaptation of increasing the overlap and the guiding angle of the valve port to protect soft seals from jet flow cracking was proposed through numerical simulations and verified by the experiment, providing reference for hydraulic lock structure design.

关 键 词：软密封 液压锁 高速射流 仿真 

分 类 号：TH137[机械工程—机械制造及自动化]