液压凿岩机部分结构参数的设计  

Design on Part of Structural Parameters of Hydraulic Rock Drill

作　　者：田文元[1] 胡明[1] 朱春霞[1] 蔡光起[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2006年第10期1134-1137,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50475052).

摘　　要：介绍了双面回油型液压凿岩机冲击机构的工作原理,给出了其活塞运动速度的表达式.以活塞台肩封油段的能量损失最小为优化目标,给出了活塞与缸体之间间隙以及封油长度的计算方法.分析了配油阀的能量损失情况,并以配油阀的能量损失最小为目标,推导出计算配油阀运动行程的方程,给出了阀芯运动行程的确定方法.将上述方法应用于YYT30型液压凿岩机的设计中.测试结果表明该凿岩机冲击机构总效率达到了50%,进一步验证了这种设计方法的正确性.The operating principle of hydraulic impact mechanism with double-chamber oil scavenger is introduced with the formula of its piston＇s moving velocity given. To minimize the energy loss due to piston shoulder in sealing section, the formula to calculate the gap between piston and inner surface of cylinder block and oil sealing length are provided. Analyzing the energy loss due to oil distributing valve, the equation to calculate the moving distance of distributing valve is derived so as to determine the moving distance of valve core. An exemplification is presented to apply the calculation results to the YYT30 hydraulic rock drill we designed, and the test result indicated that total impact efficiency of the hydraulic rock drill comes up to 50%. The correctness of such design is thus verified.

关 键 词：液压凿岩机 结构参数 能量损失 间隙 封油长度 运动行程 

分 类 号：TD421.2[矿业工程—矿山机电]