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针对目前各国液压冲击机械工作参数调节方法的局限性,突破传统结构原理,率先提出了变行程无级调节理论。通过协调改变施加于冲击器上的推进力Ft和系统工作压力P这两个控制参数,从而相对改变活塞回程反馈信号孔位置,实现活塞行程的连续可变调节来达到无级控制冲击器输出参数的目的。在此基础上设计了一种新型的变行程无级调节装置,并对该装置进行了数字仿真研究,仿真结果说明了该设计方案的正确性,为进一步研制可变频调能的液压冲击机械提供了理论依据。
Aiming at the limitations of current hydraulic impact machinery working parameters adjustment methods in various countries, the traditional structure principle is broken through and the theory of stepless adjustment with variable stroke is first proposed. By coordinating and changing the two control parameters of propulsive force Ft and system working pressure P applied to the impactor, the position of the feedback signal hole of the piston return valve is relatively changed so as to realize the continuously variable adjustment of the piston stroke to achieve the stepless control of the impactor output parameter the goal of. On this basis, a new type of variable stroke stepless adjustment device is designed, and the digital simulation of the device is carried out. The simulation results show the correctness of the design scheme, which can be used to further develop the hydraulic impact machinery with variable frequency energy The theoretical basis.