供应0811404207现货4WRL16V200M-3X/G24Z4/M

详情描述：

直销德国力士乐伺服比例阀0811404207现货4WRL16V200M-3X/G24Z4/M现货促销

经营产品：

阀类：电磁阀、换向阀、单向阀、溢流阀、减压阀、平衡

阀、插装阀、比例阀等

泵类：齿轮泵、柱塞泵、叶片泵等

承诺：保证原装正品，假一赔十   量大价格好商量！！

武穴黎翔机电设备有限公司REXROTH力士乐销售部

询价联系人：陈先生                                              

询价QQ:      1477538929，         2593165857   

欢迎您的来电！

广泛应用于钢铁、冶金、铝行业、石油化工、航天、船舶制造、煤炭、水泥、电力、汽车、工程机械、食品、药业、林业、纺织、皮革、造纸等行业领域

型号 4WRL 和 4WRLE   

德国REXROTH力士乐高频响方向阀4WRL

高频响方向阀，先导式，带电位反馈

规格10至35   

安装面按DIN 24340 A型和ISO 4401   

控制流量的方向和大小   

用于动力、位置、速度和位置的闭环控制   

RV-PL先导控制阀   

闭环位置控制先导控制阀和主级   

带不同阀标记的模块系统   

集成电控器（OBE），用于4WRLE   

标准和非线性特性曲线

德国REXROTH力士乐4WRL系列高频响方向阀




比例阀采用阀芯+阀体结构。伺服阀和伺服比例阀主要应用在闭环控制系统，比例阀的驱动装置是比例电磁铁。

伺服阀的驱动装置是力马达或力矩马达.阀体兼作阀套。

驱动装置不同.所以近些年出现了比例伺服阀。

比例阀一般高几十Hz，伺服阀中位没有死区，伺服阀对液压油液的要求更高.性能参数不同；否则容易堵塞，

用来控制流量和流向，比例阀要求低一些.比例阀有中位死区；

比例阀和伺服阀的区别主要体现在以下几点：

逐渐向伺服阀靠近，

比例换向阀属于比例阀的一种，滞环、中位死区、频宽、过滤精度等特性不同.阀的额定压降不同；比例换向阀具有与普通换向阀相似的中位机能，

而比例伺服阀性能介于伺服阀和比例阀之间，因此应用场合不同，伺服阀和伺服比例阀采用阀芯+阀套的结构。中位机能种类不同.其它结构的比例阀主要应用在开环控系统及闭环速度控制系统；因为比例阀的性能越来越好；2伺服阀的频响（响应频率）更高。阀芯结构及加工精度不同.伺服阀与比例阀之间的差别并没有严格的规定。

，可以高达200Hz左右，需要精过滤才行，而伺服阀中位机能只有O型（Rexroth产品的E型）。

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电液比例阀简称比例阀。普通液压阀只能通过预调的方式对液流的压力、流量进行定值控制。但是当设备机构在工作过程中要求对液压系统的压力、流量参数进行调节或连续控制，例如.要求工作台在工作进给时按慢、快、慢连续变化的速度实现进给，或按一定精度模拟某个佳控制曲线实现旅力控制.普通液压阀则实现不了。这时可以用电液比例阀对液压系统进行控制。

电液比例阀是一种按输入的电信号连续地、按比例地控制液压系统的液流方向、流量和压力的阀类。它山电-机械比例转换装置和液压控制阀本体两大部分构成.前者将输入的电信号连续地按比例地转换为机械力和位移输出，后者在接受这种机械力和位移之后、按比例连续地输出压力和流量.

电液比例阀的发展主要有两个途径一是用比例电磁铁取代传统液压阀的手动调节装置或取代普通电磁铁发展起来的;二是由电液伺服阀简化结构、降低精度发展起来的。下面介绍的比例阀均指前者，它是当今比例阀的主流。与普通液压阀可以互换。

比例电磁阀的结构如图5-27所示。比例电磁铁是直流电磁铁，但它与普通直流电磁铁不同。普通直流电磁铁的衔铁只有吸合和断开两个工作位置，并且在吸合时磁路中几乎没有气隙.而比例电磁铁要求吸合力或位移与给定电流成比例。并在衔铁的全部工作行程上，磁路中保持一定的气隙‘.其结构主要由极靴1、线圈2、壳体5和衔铁10等组成。线圈2中通电后产生磁场，因隔磁环4的存在。使磁力线主要部分通过衔铁10、气隙和极靴1，形成回路口极靴对衔铁产生吸力门在线圈中电流一定时。吸力的大小因极靴1与衔铁间的距离不同而变化。但衔铁在气隙适中的一段行程中，吸力随位置的改变发生的变化很小。

设计中就使比例电磁铁的衔铁在这段行程中工作。因此。改变线圈中的电流，即可在衔铁上得到与其成正比的吸力。用比例电磁铁代替螺旋手柄来调整液压阀，就能使输出乐力或流量与输人电流对应成比例地发生变化。

比例阀用于模拟控制，是介于普通开关控制与伺服控制之间的控制方式，它也特别适合于

设备的革新或改造。使设备自动化控制水平大为提高。其在现代液雌系统中占比例很大口

与普通液压阀相比.比例阀的优点是:①能简单地实现远距离控制:②能连续地、按比例地控制液压系统的压力和流量。从而实现对执行机构的位置、速度和力的连续控制，并能防止或减小压力、速度变换时的冲击;③油路简化，元件数量少。

比例阀适用于既要求能连续控制胀力、流量.和方向.而又不需要很I的控制精度的场合。

比例阀也分为压力阀、流量阀和方向阀几大类。近来又出现了功能复合化的趋势。

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