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本文讨论了一种用于气动输送系统的喷射器组(jet-pair),由通过吸入口相联接的压空喷射器和真空喷射器组成,通过气液活塞式换能运动,产生脉冲液压做功以输送流体。该喷射器组在做功过程中不仅处于变工况状态,而且其设计尺寸及交替工作时间必须相互搭配,因此需要一套不同于传统喷射器设计的方法.本文基于对喷射器组的仿真试验结果,研究了压空喷射器不同于传统喷射器的设计思路,以及真空喷射器气源压力、喷嘴直径、面积比、喉管长径比对喷射系数的影响,得出了喷射器组优化结构的配套思路,为喷射器组的工业设计打下了基础.
This article discusses a jet-pair for a pneumatic delivery system consisting of a jet ejector and a vacuum ejector coupled through a suction port to generate pulsed hydraulic work through a reciprocating motion of a gas-liquid piston To deliver fluid. The injector group is not only in a changing state during its work, but also its design size and alternate working time must be matched with each other, so a different set of methods than the traditional injector design is needed.Based on the simulation results of the injector group, , The design idea of the pressure ejector different from the traditional ejector is studied, and the influence of the ejector pressure, the nozzle diameter, the area ratio and the throat length-diameter ratio on the injection coefficient is studied. The optimum structure of the ejector group Matching ideas for the injector group laid the foundation for industrial design.