武汉百士自动化设备有限公司

R901224247 DA6VP2A5X/350FSM力士乐液压阀

武汉百士自动化设备有限公司专注于液压、气动、工控自动化备件销售，热诚欢迎新老客户咨询购买！

液压阀是一种用压力油操作的自动化元件，它受配压阀压力油的控制，通常与电磁配压阀组合使用，可用于远距离控制水电站油、气、水管路系统的通断。常用于夹紧、控制、润滑等油路。有直动型与先导型之分，多用先导型。

用于各种机械设备中，为了完成特定的运动控制，各种液压阀应运而生，其中，伺服液压阀因具有响应速度快，执行精度高的特点而成为液压运动控制中完成高精度和高速度的较好。

液压阀是一种用压力油操作的自动化元件，它受配压阀压力油的控制，通常与电磁配压阀组合使用，可用于远距离控制水电站油、气、水管路系统的通断。常用于夹紧、控制、润滑等油路。有直动型与先导型之分，多用先导型。

液压阀是一种用压力油操作的自动化元件，它受配压阀压力油的控制，通常与电磁配压阀组合使用

，可用于远距离控制水电站油、气、水管路系统的通断。

用于降低并稳定系统中某一支路的油液压力，常用于夹紧、控制、润滑等油路。有直动型、先导型、叠加型之分。

液压传动中用来控制液体压力﹑流量和方向的元件。其中控制压力的称为压力控制阀，控制流量的称为流量控制阀，控制通﹑断和流向的称为方向控制阀。

按控制方法分类：手动，电控，液控

按功能分类：流量阀（节流阀、调速阀，分流集流阀）、压力阀（溢流阀，减压阀，顺序阀，卸荷阀）、方向阀（电磁换向阀、手动换向阀、单向阀、液控单向阀）

按安装方式分：板式阀，管式阀，叠加阀，螺纹插装阀，盖板阀[1] 

按用途分为单向阀和换向阀。单向阀：只允许流体在管道中单向接通，反向即切断。换向阀：改变不同管路间的通、断关系。根据阀芯在阀体中的工作位置数分两位、三位等；根据所控制的通道数分两通、三通、四通、五通等；根据阀芯驱动方式分手动，机动，电动，液动等。图2为三位四通换向阀的工作原理。P 为供油口，O 为回油口，A 、B 是通向执行元件的输出口。当阀芯处於中位时，全部油口切断，执行元件不动；当阀芯移到右位时，P 与A 通，B 与O 通；当阀芯移到左位时，P 与B 通，A 与O 通。这样，执行元件就能作正、反向运动。

60年代后期，在上述几种液压控制阀的基础上又研制出电液比例控制阀。它的输出量（压力、流量）能随输入的电信号连续变化。电液比例控制阀按作用不同，相应地分为电液比例压力控制阀﹑电液比例流量控制阀和电液比例方向控制阀等。

按用途分为溢流阀﹑减压阀和顺序阀。⑴溢流阀：能控制液压系统在达到调定压力时保持恒定状态。用於过载保护的溢流阀称为安全阀。当系统发生故障，压力升高到可能造成破坏的限定值时，阀口会打开而溢流，以保证系统的安全。⑵减压阀：能控制分支回路得到比主回路油压低的稳定压力。减压阀按它所控制的压力功能不同，又可分为定值减压阀（输出压力为恒定值）﹑定差减压阀（输入与输出压力差为定值）和定比减压阀（输入与输出压力间保持一定的比例）。⑶顺序阀：能使一个执行元件（如液压缸﹑液压马达等）动作以后，再按顺序使其他执行元件动作。油泵产生的压力先推动液压缸1运动，同时通过顺序阀的进油口作用在面积A 上，当液压缸1运动完全成后，压力升高，作用在面积A 的向上推力大於弹簧的调定值后，阀芯上升使进油口与出油口相通，使液压缸2运动。

利用调节阀芯和阀体间的节流口面积和它所产生的局部阻力对流量进行调节，从而控制执行元件的运动速度。流量控制阀按用途分为 5种。⑴节流阀：在调定节流口面积后，能使载荷压力变化不大和运动均匀性要求不高的执行元件的运动速度基本上保持稳定。⑵调速阀：在载荷压力变化时能保持节流阀的进出口压差为定值。这样，在节流口面积调定以后，不论载荷压力如何变化，调速阀都能保持通过节流阀的流量不变，从而使执行元件的运动速度稳定。⑶分流阀：不论载荷大小，能使同一油源的两个执行元件得到相等流量的为等量分流阀或同步阀；得到按比例分配流量的为比例分流阀。⑷集流阀：作用与分流阀相反，使流入集流阀的流量按比例分配。⑸分流集流阀：兼具分流阀和集流阀两种功能。

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