PARKER比例阀D31FCE01CC1N1B70维修保养输入信号增大,供气用电磁阀先导阀1换向,而排气用电磁先导阀7处于复位状态,则供气压力从SUP口通过阀1进入先导室5,先导室压力上升,气压力作用在膜片2的上方,则和膜片2相连的供气阀芯4便开启,排气阀芯3关闭,产生输出压力。此输出压力通过压力传感器6反馈至控制回路8。在这里,与目标值进行快速比较修正,知道输出压力与输入信号成一定比例为止,从而得到输出压力与输入信号的变化成比例的变化。由于没有喷嘴挡板机构,故阀对杂质不敏感,可靠性高。
特点
1)可实现压力、速度的无极调节,避免了常通的开关式气阀换向时的冲击现象。
2)能实现远程控制和程序控制。
3)与断续控制相比,系统简化,元件大大减少。
4)与液压比例阀相比,体积小、重量轻、结构简单、成本较低,但响应速度比液压系统慢得多,对负载变化也比较敏感。
5)使用功率小、发热少、噪声低。
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