为了研究换向系统结构参数对液压冲击器工作性能的影响,根据气液联合驱动式液压冲击器,采用高速开关电磁阀作为先导阀和二通插装阀作为主阀的配流换向组合,替代了传统液压换向阀配流换向系统,构建了配流换向系统数学模型,在多领域建模仿真软件AMESim平台下,构建液压冲击器的整体仿真模型,获得了不同主阀芯质量、弹簧刚度下的活塞的速度和位移曲线.结果表明:主阀芯质量越轻,弹簧刚度越大,冲击活塞到达最大冲击速度和最大位移所需的时间越短,冲击效率越高.仿真结果对提升冲击器的品质有一定的指导.%In order to study the influence of structural parameters of commutation system on the working performance of hydraulic impactor,based on the gas-liquid joint drive type hydraulic impactor,a high speed solenoid valve was used as a pilot valve and the two cartridge valve was matched with the main valve,which replaced the traditional hydraulically-commutated valve flow reversing system,and the mathematical model of valve reversing system was established.Under multi-domain modeling and simulation software AMEsim platform,the united simulation model of hydraulic impactor was built.The velocity and displacement curves of the piston under different spool mass and spring stiffness were obtained.The results show that the lighter the mass of the main spool,the greater the spring stiffness,the shorter the time required for the impact pison to reach the maximum impact velocity and maximum displacement,and the higher impact efficiency,which provides some guidance for improving the quality of the impactor.
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