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为给卸压阀组设计和调试时关键参数的选取提供理论依据,根据三级插装阀式卸压阀组的结构和工作原理,利用AMESim软件搭建卸压、卸荷过程仿真模型,分析卸压阀组关键参数(如插装阀阻尼孔、节流阻尼孔、电磁阀换向时间)对液压机高压容腔卸压、卸荷过程中振动和冲击的影响。结果表明,慢速卸压、快速卸荷电磁阀的换向时间相差1 s且A,B,D3个主要节流孔直径分别为1.2,0.8和2.0 mm时,可在保证快速卸压的前提下,很好地缓解回油管路的压力、流量波动,让压力和流量变化趋于平缓,减少插装阀组的振动。
In order to provide the theoretical basis for the selection of the key parameters for the design and debugging of the relief valve assembly, according to the structure and working principle of the three-stage cartridge relief valve assembly, the simulation model of pressure relief and unloading process was established by AMESim software, The key parameters of the valve block (such as cartridge valve orifice, throttle orifice, solenoid valve commutation time) on the hydraulic press high pressure chamber relief, unloading process of vibration and impact. The results show that the slow relief, rapid unloading electromagnetic valve commutation time difference of 1 s and A, B, D3 main orifice diameter of 1.2, 0.8 and 2.0 mm, respectively, in ensuring the premise of rapid pressure relief Under, well to ease back to the pressure of the oil pipeline, flow fluctuations, so that pressure and flow changes tend to be gentle, reducing the cartridge valve group vibration.