美国哈威HAWE电磁换向阀资料下载

HAWE电磁换向阀是用电磁铁的吸力来推动阀芯运动以变换流体流动方向的控制阀，简称电磁阀。HAWE电磁换向阀有滑阀和球阀两种结构，通常所说的HAWE电磁换向阀为滑阀结构，称球状或锥状阀芯的HAWE电磁换向阀为电磁换向座阀，也称电磁球阀。
HAWE电磁换向阀的结构种类
在液压传动系统中广泛采用的是滑阀式换向阀，在这里主要介绍这种换向阀的几种结构。 　　1.手动换向阀：手动换向阀是利用手动杠杆来改变阀芯位置实现换向的 　　2.机动换向阀：又称行程阀,它主要用来控制液压机械运动部件的行程，它是借助于安装在工作台上的挡铁或凸轮来迫使阀芯移动，从而控制油液的流动方向。机动换向阀通常是二位的,有二通、三通、四通和五通几种,其中二位二三通机动阀又分常闭和常开两种。 　　3.HAWE电磁换向阀：利用电磁铁的通、断电而直接推动阀芯来控制油口的连通状态。 　　4.液动换向阀 　　5.电液换向阀：由HAWE电磁换向阀和液动换向阀组合而成。 　　HAWE电磁换向阀起先导作用，它可以改变控制液流的方向，从而改变液动换向阀的位置。由于操纵液动换向阀的液压推力可以很大，所以主阀可以做得很大，允许有较大的流量通过。这样用较小的电磁铁就能控制较大的液流。 　　6.比例式HAWE电磁换向阀 　　比例方向阀是以在阀芯外装置的电磁线圈所产生的电磁力，来控制阀芯的移动，依靠控制线圈电流来控制方向阀内阀芯的位移量，故可同时控制油流动的方向和流量。
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