运动副配合间隙对射流式液动锤性能的影响  

The impact of the fit clearances of kinematic pairs on the performance of the liquid-jet hammer

作　　者：殷其雷[1] 彭枧明[1] 

机构地区：[1]吉林大学建设工程学院

出　　处：《石油机械》2008年第8期4-6,15,共4页China Petroleum Machinery

基　　金：国家863计划专题“高效破岩冲击器的研制及旋冲破岩工艺技术研究”(2006AA06A109-3-2-1)

摘　　要：在活塞杆外径尺寸和缸体内径尺寸确定的情况下,通过更换不同尺寸的缸盖和活塞,观测了射流式液动锤运动副配合间隙变化对其性能影响的规律。观测研究结果表明:(1)当活塞与内缸配合间隙为常规设计值时,随着活塞杆与缸盖配合间隙的加大,在一定范围内冲击频率降低较平缓,超过一定范围后冲击频率随配合间隙的加大而迅速降低;(2)当活塞杆与缸盖配合间隙为常规设计值时,随着活塞与内缸配合间隙的加大,冲击频率几乎成线性迅速降低;(3)输入流量的增加不能改变配合间隙对冲击频率影响的趋势;(4)在数值相同的情况下,活塞与内缸配合间隙对冲击频率的影响比活塞杆与缸盖配合间隙的影响更为显著。Under the condition of determination of O.D.of piston rod and I.D.of cylinder body,the impact rule of kinematic pair fit clearance variation of liquid-jet hammer on its performance is observed by replacing cylinder covers and pistons with different sizes.The observation study result shows that when the fit clearance between the piston and inner cylinder is common designed value,the impact frequency decreases slowly within certain scope with the increase of fit clearance between piston rod and cylinder cover,and over certain scope,the impact frequency decreases rapidly with the increase of fit clearance.When the fit clearance between piston rod and cylinder cover is common designed value,the impact frequency almost decreases rapidly linearly with the increase of fit clearance between piston and inner cylinder.The increase of input flowrate cannot change,the impact tendency of fit clearance on impact frequency.Under the same value,the influence of piston-inner cylinder fit clearance on impact frequency is more significant than that of piston rod-cylinder cover fit clearance on impact frequency.

关 键 词：射流式液动锤 运动副 配合间隙 冲击频率 

分 类 号：TH112[机械工程—机械设计及理论] TK523[动力工程及工程热物理—热能工程]