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4WE6H73-6X/EG24N9K4/A12 WE型电磁滑阀

方向控制阀

类型:单向阀、换向阀

一、单向阀

类型:普通单向阀、液控单向阀

1、普通单向阀

作用:只允许油液沿一个方向流动，不允许油液反向倒流(起止回作用)

对单向阀的性能要求:

(1) 正向导通时，压力损失要小;

(2)反向截止时，密封性要好。

2、

液控单向阀

作用:

(1)起止回作用;

(2)必要时解除逆止，允许油液反向通过。

3、单向阀用途

(1)止回作用:安装在泵的出口，p.=0.3~0.5 bar

(2)作背压阀用:防止液压缸前冲或爬行，使系统作平稳。

(3)作锁紧装置用:起重机支腿、夹紧回路等。

(4)保持控制油路有必要的压力: Pr≥P液挖

(5)作复合阀使用:单向节流阀、单向顺序阀、单向减压阀、单向调速阀等。

(6)局部回路作安全阀使用: Ppr>P换热器正常工作的距力

往复式滑阀又有平面型单阀瓣、平面型双阀瓣和柱塞式3种。柱塞式滑阀广泛用于液压和气动装置中。当活塞到达左极限位置（行程终了）时，滑阀驱动轴被带动，使柱塞位置移至左边，切换流体的流向，p1压力的流体便流向B通道，进入压力缸的B′室，使活塞向右移动，A室中的流体则回流至通道 A并流向出口。当活塞到达右极限位置时，滑阀的驱动轴又被带动，使柱塞位置回复到右边位置

WE型换向阀是由电磁铁控制的滑阀式换向阀，它主要用于控制液体的通断和流动方向。

其结构主要是由阀体、电磁铁、滑阀以及复位弹簧等组成。在不通电的情况下被复位弹簧保持在中间位置或初始位置上(脉冲阀除外)。电磁铁的推力通过推杆作用在滑阀上，并且把它从静止位置推到工作位置上(终端位置)，由此改变了液流的方向P→A和B→T或者P→B和A→T。当电磁铁断电后，滑阀被复位弹簧重新推到原来的静止位置上。在电磁铁断电时，用故障检查按钮推动滑阀移动。

电磁阀线圈的额定电压有DC12V、DC24V、AC24V（50/60Hz）、AC110V（50/60Hz）、AC220V（50/60Hz）、AC380V（50/60Hz）。一般在电气设计时要么采用AC220V（不需加装开关电源，成本低、线路简单而便于维护）、要么采用DC24V（常用的的安全电压、开关电源/电磁阀线圈都易于维修更换）。

4WE6H73-6X/EG24N9K4/A12 WE型电磁滑阀

WE型换向阀是电磁换向滑阀，可用作电磁组件。它们控制流的开始，停止和方向。

方向阀主要由壳体（1），一个或两个电磁体（2），控制阀芯（3）和复位弹簧（4）组成。

在断电状态下，控制阀芯（3）通过复位弹簧（4）保持在中间位置或初始位置（“ O”型除外）。

当接通油中的电磁体（2）时，控制阀芯（3）从其静止位置移至所需的较终位置。这将根据所选符号释放所需的流向。

关闭电磁铁（2）后，将控制阀芯（3）推回到中间位置或初始位置（带有棘爪“ OF”的阀和没有弹簧类型“ O”的阀除外）。

辅助执行机构（5）可以在没有磁铁的情况下手动切换阀。

液压系统必须正确通风，以确保正常工作。

没有弹簧复位“ O”（仅在符号A，C和D时可用）

该版本是一种方向阀，具有两个开关位置和两个不带棘爪的电磁体。断电时，控制滑阀（3）上没有弹簧复位的阀没有定义的基本位置。

无弹簧复位，带棘爪“ OF”（仅适用于符号A，C和D）

该版本是具有两个开关位置和两个带棘爪电磁体的方向阀。控制阀芯（3）通过棘爪固定在相应的开关位置。因此，在运行过程中，可以省去向电磁铁的较好电流供应，这有助于节能运行。

版本“ .73 ... A12”（软切换行为）

控制阀芯和螺线管的组成大大减少了在打开或关闭阀门时发生的开关行程数。测得的加速度为a的开关行程可减少约。与标准阀相比，根据控制阀芯的版本，为85％（请参见“加速值”）。

注意事项：

带有两个或更多阀门的泄压管路中的压力峰值可能会导致意外的控制阀芯运动。建议布置单独的回油管路或在排放管路中安装止回阀。

由于设计原理，阀门容易发生内部泄漏，在使用寿命内泄漏可能会增加。

4WE 6 E6X / ... E型

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安全阀(又称泄压阀)是根据压力系统的工作压力(工作温度)自动启闭，一般安装于封闭系统的设备或管路上保护系统安全。当设备或管道内压力或温度超过安全阀设定压力时，自动开启泄压或降温，保证设备和管道内介质压力(温度)在设定压力(温度)之下，保护设备和管道正常工作，防止发生意外，减少损失。安全阀主要被广泛应用于：蒸汽锅炉、液化石油气汽车槽车或液化石油气****罐车、采油井、蒸汽发电设备的高压旁路、压力管道、压力容器等。