液压破碎锤内锥阀中流道流场的数值分析

通过对液压破碎锤内锥阀内流道流场进行数值计算和模拟，探讨了不同情况下液压锥阀内流场包括流道速度场、压力场、流线和涡量线等的分布情况，分析了产生涡旋的位置和强度，找出了造成能耗的主要原因。结果表明，通过对锥阀阀座的优化设计，减少了流线的疏密程度和涡旋的大小，降低了能量损失，负压区也随之改变，减少了噪声，提高了能量利用率。

A Numerical Analysis of Fluid Flow on the Poppet Valve Channel in Hydraulic Hammer

The velocity,pressure,stream function and velocity magnitude in different case were discussed by numerical analysis and simulation of the fluid flow in the poppet valve channel of hydraulic hammer. The place and intensity of whirlpools were analyzed and the main reasons of energy loss were found. It is indicated that the stream function, velocity magnitude,energy loss and flow noise is reduced ,negative pressure is changed and the use of energy is improved by optimizing design of the poppet valve seat.