DBW10A2-52/200-6EG24N9K4力士乐溢流阀

DBW10A2-52/200-6EG24N9K4力士乐溢流阀 德国博世力士乐REXROTH溢流阀

性能

(1)调压范围：它是指减压阀输出压力P2的可调范围，在此范围内要求达到规定的精度。调压范围主要与调压弹簧的刚度有关。

(2)压力特性：它是指流量g为定值时，因输入压力波动而引起输出压力波动的特性。输出压力波动越小，减压阀的特性越好。输出压力必须低于输入压力—定值才基本上不随输入压力变化而变化。

(3)流量特性：它是指输入压力—定时，输出压力随输出流量g的变化而变化的持性。当流量g发生变化时，输出压力的变化越小越好。一般输出压力越低，它随输出流量的变化波动就越小

DB 型阀是先导控制式的溢流阀； DBW 型阀是先导控制式的电磁溢阀。 DB

型阀是用来控制液压系统的压力； DBW 型阀也可以控制液压系统的压力， 并且

能在任意时刻使系统卸荷。

DB 型阀主要是由先导阀和主阀组成。 DBW 型阀是由电磁换向阀、 先导阀和

主阀组成。

DB 型溢流阀：

A 腔的压力油作用在主阀芯下端的同时，

通过阻尼器 、  和通道 、  、

 作用在主阀芯上端和先导阀 的锥 阀

上。 当系统压力超过弹簧 的调定值时， 锥阀

 被打开。 同时主阀芯上端的压力油通过阻尼

器 、 通道 、 弹簧腔 及通道

流回 B 腔（控制油内排型） 或通过外排口

流回油箱（控制油外排型） 。 这样， 当压力油通过阻尼器 、  时在主阀

芯 上产生了一个压力差， 主阀芯在这个压差的作用下打开， 这样在调定的

工作压力下压力油从 A 腔流到 B 腔（即卸荷） 。

DBW 型电磁溢流阀：

此阀工作原理与 DB 型阀相同， 只是可通过安装在先导阀上的电磁换向阀

 使系统在任意时刻卸荷。

DB/DBW 型阀均设有控制油内部供油道 、  和内部排油道 ；

控制油外供口 X 和外排口 Y。这样就可根据控制油供给和排出的不同形式的组合

内供内排、 外供内排、 内供外排和外供外排 4 种型式。

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电磁线圈是通电产生电磁的一种装置。在铁芯的外部缠绕与其功率相匹配的导电绕组，这种通有电流的线圈像磁铁一样具有磁性，它也叫做电磁铁（electromagnet）。我们通常把它制成条形或蹄形状，以使铁芯更加容易磁化。另外，为了使电磁铁断电立即消磁，我们往往采用消磁较快的的软铁或硅钢材料来制做。这样的电磁铁在通电时有磁性，断电后磁就随之消失。