A10VSO型号(32系列)四孔安装力士乐柱变量泵 力士乐比例阀，比例流量阀 REXROTH液压阀据悉，REXROTH不仅是世界*强公司，也是比较有名高科技企业之一，50多年来，BoschRexroth集团及BoschRexroth公司的业务部门致力开发专业型液压传动领域高科技产品，产品和品牌已享誉。原装力士乐柱塞泵,Rexroth叶片泵上海现货德国力士乐柱塞泵A10VSO71DR/31R-PPA12N00 

就核心组成部件齿轮而言主要由公法线齿轮泵和圆弧齿轮泵。公法线齿轮泵输送含杂质的介质比圆弧齿轮泵要耐用，而圆弧齿轮泵结构特殊，输送干净的介质噪音低，寿命长，各有各的优点。

博世力士乐比例阀REXROTH力士乐比例阀阀对流量的控制可以分为两种：
一种是开关控制：要么全开、要么全关，流量要么zui大、要么zui小，没有中间状态，如普通的电磁直通阀、电磁换向阀、电液换向阀。力士乐比例阀，比例流量阀 REXROTH液压阀
另一种是连续控制：阀口可以根据需要打开任意一个开度，由此控制通过流量的大小，这类阀有手动控制的，如节流阀，也有电控的，如比例阀、伺服阀。
所以使用比例阀或伺服阀的目的就是：以电控方式实现对流量的节流控制（当然经过结构上的改动也可实现压力控制等），既然是节流控制，就必然有能量损失，伺服阀和其它阀不同的是，它的能量损失更大一些，因为它需要一定的流量来维持前置级控制油路的工作。

REXROTH力士乐比例阀力士乐比例阀，比例流量阀 液压阀

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