活塞式气动真空发生器节能控制研究

Research on energy-saving control of piston typed pneumatic vacuum generator

在真空吸盘吸取工件后的真空维持阶段,为了能够减少活塞式气动真空发生器的耗气量,提出了3种节能控制回路进行对比试验。结果表明,阶梯式流量控制方式节能效果显著、适应范围广。为此,深入研究了供给流量与工况参数、结构参数的相互影响关系,以此为依据设计了真空压差致动的阶梯式流量控制阀。试验结果表明,相比同级别射流式真空发生器,改进后的活塞式真空发生器不仅能够迅速达到要求的真空度,而且在60 s工作时间内减少约71%的耗气量,实现了节能。

In the vacuum maintaining stage after the vacuum sucking disk sucked up the workpiece, for the sake of capable of reducing the air consumption of piston typed pneumatic vacuum generator, three kinds of energy-saving controlling loops was put forward for carrying out the contrast experiment. The result showed that the stepped flow rate control was notable in the effect of energy-saving and has a wide suitability range. Therefore, the mutual influencing relationship between the supplied volume of flow and working condition parameters and structural parameters was deeply studied. Taking this as a foundation the vacuum pressure difference actuated staged flow rate control valve was designed. The result of experiment showed that while comparing with the same leveled jet typed vacuum generator, the being improved piston typed vacuum generator realized the energy saving, it could not only reach the needed vacuity rapidly but could reduce the air consumption to about 71% within 60 seconds of operation time.