【摘要】 针对标准比例插装阀无法满足压铸机射料系统对控制精度和动态响应指标要求的问题,从系统的工况参数出发,推导主动式比例插装阀结构参数的设计公式,使比例插装阀的最大阀口开度、阀口体积流量增益、阶跃响应速度与系统的需求相匹配,从而降低先导流量的需求,有利于降低先导阀的成本和提高先导阀的频响.根据该设计方法,对压铸机射料系统中所采用的大流量比例插装阀进行匹配性设计,在满足体积流量增益的前提下,有效地缩短了主阀芯的总行程和控制活塞直径,先导阀规格由10通径降低到6通径.仿真结果表明,采用新设计的比例插装阀,压射系统达到了预期的技术指标.更多还原

【Abstract】 A common proportional cartridge valve cant satisfy the requirements of the dynamic and accuracy performances for the shot system of a die-casting machine.The design formulations for the structural parameters of active proportional cartridge valve were deduced from the working conditions and performance requirements of the shot system so that the maximum opening,flow gain and step response of the proportional cartridge valve can match the requirements of system.Then the pilot flow rate was minimized,which is helpful to improve the frequency response of the pilot stage and reduce costs.An active proportional cartridge valve in the shot system of die-casting machine was optimized according to the design formulations.Both the stroke of cone and the diameters of control piston were greatly decreased.The size of pilot valve was reduced from NG 10to NG 6.Simulation results proved that the re-designed proportional cartridge reached the expected performance of the shot system.更多还原