摘要
为了提高氮爆式液压冲击器在公路夯实领域的冲击稳定性,建立氮爆式液压冲击器活塞回程运动、冲击运动的数学模型,并运用Simulink数值计算平台建立活塞运动的仿真模型。结果表明:冲程运动时,活塞加速度随时间单调减小;回程运动时,活塞加速度随时间先减小后增加,蓄能器氮气室和液压系统的配合明显提高了速度控制的稳定性。以应用氮爆式液压冲击器的小型破碎锤为例,实测不同液压系统压力下冲程和回程最大速度,通过与仿真结果比较,回程速度和冲程速度的相对误差分别为13.3%和2.6%。
In order to improve the nitrogen explosion type hydraulic impacter stability in the field of highway cement,the mathematical models of return movement,impact piston movement of the nitrogen explosion type hydraulic impactor were established. The simulation model of the piston movement was set up by using numerical calculation platform Simulink. The results show that the acceleration of the piston monotonically decreases at stroke; the acceleration of the piston decreases firstly then increases at return. The cooperation of the accumulator nitrogen chamber and the hydraulic system obviously improves the stability of the speed control. Taking a small hammer with nitrogen explosion type hydraulic impacter as example,the stroke and return maximum speeds under different hydraulic system pressures were measured. Through comparing test results with simulation,the relative errors of the stroke and the return speeds are 13. 3% and 2. 6% respectively.
作者
李占锋
赖成
LI Zhanfeng;LAI Cheng(Mechanical Engineering Department,Yantai Vocational College,Yantai Shandong 264670,China;College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China)
出处
《机床与液压》
北大核心
2018年第10期100-103,共4页
Machine Tool & Hydraulics
