R900923204 4WE6Y6X/EG24N9K4QMAG24力士乐比例阀

我司主要经销气动，液压，工控自动化流体控制设备备品备件

主营品牌：博世力士乐BOSCH-REXROTH、安沃驰AVENTICS、迪普马DUPLOMATIC、爱尔泰克AIRTEC、本特利Bently、贝加莱B&R、世格ASCO、阿托斯ATOS。

主要涵盖产品：电磁阀、比例阀、单向阀、溢流阀、压力继电器、压力传感器、叶片泵、柱塞泵、齿轮泵、蓄能器、气动阀、气缸、气源处理单元、探头、前置器、延伸电缆、监测模块、校验仪、伺服驱动器、PLC模块、I/O模块、伺服电机、触摸屏等。

自动控制可分成断续控制和连续控制。断续控制即开关控制。气动控制系统中使用动作频率较低的开关式(ON-OFF)的换向阀来控制气路的通断。靠减压阀来调节所需要的压力，靠节流阀来调节所需要的流量。这种传统的气动控制系统要想要有多个输出力和多个运动速度，就需要多个减压阀、节流阀及换向阀。这样，不仅元件需要多，成本高，构成系统复杂，且许多元件都需要预先进行人工调节。电气比例阀控制属于连续控制，其特点是输出量随输入量的变化而变化，输出量与输入量之间存在一定的比例关系。比例控制有开环控制和闭环控制之分。

结构原理

输入信号加大，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。

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