流体传动与控制
流體傳動與控製
류체전동여공제
FLUICL POWER TRANSMISSION AND CONTROL
2015年
1期
9-14
,共6页
大直径%气动潜孔锤%动力学%入岩钻进
大直徑%氣動潛孔錘%動力學%入巖鑽進
대직경%기동잠공추%동역학%입암찬진
large diameter%pneumatic DTH hammer%dynamics%entering-rock drilling
大直径气动潜孔锤是一种以压缩空气作为动力的冲击破岩工具。建立了大直径气动潜孔锤的数学模型，采用有限差分法，模拟了活塞在气室内稳定运动状态下的动力学过程，得到了特性的规律以及各结构参数对工作过程的影响。活塞低速运动时，后气室会出现压力波动现象，采取合适的时间步长可以减小数值仿真中出现的压力波动。
大直徑氣動潛孔錘是一種以壓縮空氣作為動力的遲擊破巖工具。建立瞭大直徑氣動潛孔錘的數學模型，採用有限差分法，模擬瞭活塞在氣室內穩定運動狀態下的動力學過程，得到瞭特性的規律以及各結構參數對工作過程的影響。活塞低速運動時，後氣室會齣現壓力波動現象，採取閤適的時間步長可以減小數值倣真中齣現的壓力波動。
대직경기동잠공추시일충이압축공기작위동력적충격파암공구。건립료대직경기동잠공추적수학모형，채용유한차분법，모의료활새재기실내은정운동상태하적동역학과정，득도료특성적규률이급각결구삼수대공작과정적영향。활새저속운동시，후기실회출현압력파동현상，채취합괄적시간보장가이감소수치방진중출현적압력파동。
The large diameter pneumatic Down-the-hole hammer is an entering-rock drilling tool powered by com-pressed air. The mathematical model is built and the kinetic process of impactor is analyzed by using finite differ-ence algorithm. The change rule of parameters is obtained. The overlarge input pressure leads to the unnecessary en-ergy consumption and too low input pressure can't generate the drilling required impact power and frequency. The phenomenon of pressure oscillation happening in the inlet chamber is theoretically analysed. The research results show that the pressure oscillation can be decreased by taking the appropriate time step.
