机械科学与技术2017，Vol.36Issue(2)：178-183,6.DOI:10.13433/j.cnki.1003-8728.2017.0203
一种双腔射击式气动冲击锤的设计与性能分析
The Design and Characteristics Analysis of a Dual-chamber Shooting Pneumatic Hammer
肖蒙 1严宏志 2周腾飞 1江晓磊2
作者信息
- 1. 中南大学高性能复杂制造国家重点实验室,长沙410083
- 2. 中南大学机电工程学院,长沙410083
- 折叠
摘要
Abstract
This paper presents a compact dual-chamber shooting pneumatic hammer,establishes a dynamic model for its working process.The pneumatic hammer impact velocity,displacement variation with time and the effects of structural and aerodynamic parameters on motion characteristics of the hammer core are obtained through numerical solutions.The simulation results indicate that impact velocity of the core increases with the diameter of the ventilation holes,the trend of the core's velocity changes by the exhaust hole of back pressure gas chamber within a certain size,when the exhaust hole's diameter is smaller,the core's velocity decrease after an initial increase;but when the exhaust hole's diameter increases to a certain value,the core's velocity always increases.The initial volume of preloading gas chamber has no effect on the impact velocity of the core.Moreover,after using the finite element method to simulate the impact collision process of the hammer,the time of impact process and the size of the impact force are obtained.The study shows that this dual-chamber shooting pneumatic hammer has a light structure and large impact force.关键词
双腔射击式气动冲击锤/动力学模型/数值求解/有限元Key words
dual-chamber shooting pneumatic hammer/dynamic model/numerical solution/finite element method分类
机械制造引用本文复制引用
肖蒙,严宏志,周腾飞,江晓磊..一种双腔射击式气动冲击锤的设计与性能分析[J].机械科学与技术,2017,36(2):178-183,6.
