DBW30B2-52/200-6EG24N9K4

DBW30B2-52/200-6EG24N9K4 REXROTH电磁溢流阀，武汉百士自动化设备有限公司供应产品，现货库存，原厂原装，质量保障，价格优惠；移动电话：15307180902，商务QQ：980227448，传真：027-87680708-608，联系人：雷青；欢迎新老客户咨询购买！

方向控制阀

方向控制阀用于控制或调节液压系统或回路中方向及其通和断,从而控制执行元件的

运动方向及其启动、停止的阀。如单向阀、换向阀等;

大型钢厂现场采用的主要方向控制阀，如:电磁换向阀、手动换向阀、电液换向阀、单向阀、方向插件，插装阀。

3、4WEH..型方向阀

型号4WEH..型方向阀WEH型方向阀是-种电液操作的方向滑阀。它们用于控制液流的开启、停止和方向。

此类阀组成主要包括阀体( 1 )主控制阀芯(2 )一个或两个复位弹簧( 3.1 )和(3.2 ),带一个或两个电磁铁:电磁铁"a” (5.1 ),电磁铁"b" (5.2 )的先导阀(4)。

主阀阀芯由弹簧或液压力保持在中位或初始位置。在初始位置, 两个弹簧腔( 6 )和( 8 )通过先导阀无压的油箱连通。经过控制油路(7 )向先导阀(4)供油。控制泊可以由内部或外部供给( 外部供给油口X )当先导阀操作时,如电磁铁"a”得电,先导滑阀(10)向左移动,因此弹簧腔(8)获得先导油压力而弹簧腔(6)保持无压状态。

先导压力施压于主阀芯的左端, 并克服弹簧力( 3.1),其结果,主阀的P至B和A至T被接通。当电磁铁断电,先导阀回复至初始位置(带定位机构滑阀除外),弹簧腔( 8 )向油箱卸荷。

控制油从弹簧腔经先导阀排入Y口。控制油可内部或外部供油和回油外部经油口Y )可选择的应急手动操作( 9 ),在电磁铁不通电情况下,可对先导滑阀( 10 )进行操作。

DBW30B2-52/200-6EG24N9K4 REXROTH电磁溢流阀

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液压系统的组成及其作用

一个完整的液压系统由五个部分组成，即动力元件、执行元件、控制元件、辅助元件（附件）和液压油。

动力元件的作用是将原动机的机械能转换成液体的压力能，指液压系统中的油泵，它向整个液压系统提供动力。液压泵的结构形式一般有齿轮泵、叶片泵和柱塞泵。

执行元件(如液压缸和液压马达)的作用是将液体的压力能转换为机械能，驱动负载作直线往复运动或回转运动。

控制元件(即各种液压阀)在液压系统中控制和调节液体的压力、流量和方向。根据控制功能的不同，液压阀可分为村力控制阀、流量控制阀和方向控制阀。压力控制阀又分为益流阀(安全阀)、减压阀、顺序阀、压力继电器等；流量控制阀包括节流阀、调整阀、分流集流阀等；方向控制阀包括单向阀、液控单向阀、梭阀、换向阀等。根据控制方式不同，液压阀可分为开关式控制阀、定值控制阀和比例控制阀。

辅助元件包括油箱、滤油器、油管及管接头、密封圈、快换接头、高压球阀、胶管总成、测压接头、压力表、油位油温计等。

液压油是液压系统中传递能量的工作介质，有各种矿物油、乳化液和合成型液压油等几大类。

液压系统结构

液压系统由信号控制和液压动力两部分组成，信号控制部分用于驱动液压动力部分中的控制阀动作。

液压动力部分采用回路图方式表示，以表明不同功能元件之间的相互关系。液压源含有液压泵、电动机和液压辅助元件；液压控制部分含有各种控制阀，其用于控制工作油液的流量、压力和方向；执行部分含有液压缸或液压马达，其可按实际要求来选择。