船舶液压系统备件力士乐REXROTH二通插装阀R900912549 LC25DB20E7X/逻辑阀船舶液压系统备件力士乐REXROTH二通插装阀R900912549 LC25DB20E7X/逻辑阀，上海韦米机电设备有限公司供应产品，销售热线：13524123009，在线QQ：2896079243，传真：021-51334670；联系人：雷青。产品图片实拍，价格货期快速报价，大量产品现货供应，价格优惠；热诚欢迎新老客户咨询下单！







力士乐REXROTH二通插装阀，压力控制功能

R900912549 LC25DB20E7X/

R900912543 LC32DB20E7X/

LC..DB（标准）

规格 16 … 100

组件系列 6X, 7X

大流量 7000 l/min

规格 16 … 100

组件系列 6X, 7X

用于压力功能的二通插装阀为先导式座阀或滑阀。设计为插装阀的功率单元安装在按照 DIN ISO 7368 进行标准化的接收孔内，且使用控制盖闭合。

用于手动或电动比例压力调节的先导控制阀作为先导阀集成到控制盖内或安装在控制盖上，其安装尺寸符合 DIN 24 340。

通过将插装阀与控制盖组合，可以实现不同的压力功能。

压力溢流功能

用于压力溢流功能的插装阀（型号 LC .DB...）被设计为无面积差的座阀（在油口 B 处无有效面积）。油口 A 处的有效压力经先导油供油节流孔导入到元件的弹簧侧。在先导控制阀上设定的压力下，阀芯由弹簧力进行压力补偿和闭合。

当达到调定压力时，阀芯开启，且油口 A 处的压力将根据压力-流体特性而受到限制。

减压功能

静止位置闭合

对于具有开启特性的减压功能，将应用一个压力限制插装阀（型号LC..DB40D...）和一个带有减压先导控制阀的控制盖（型号 LFA..DR...）。先导油经供油节流孔和打开的先导控制阀从油口 A 导入到 B 侧。

主阀芯打开，并释放从油口 A 到油口 B 的流量。

当达到调定压力时，阀芯闭合并且油口 B 处的压力将根据压力-流体特性降低。次级受控侧的潜在压力增加经先导控制阀第三路排放至油箱。方向阀的设置将启动执行附加阻塞功能（型号 LFA..DRW...）。

压力顺序功能

此功能启动次级系统基于压力的连接。

所需的切换压力通过集成在控制盖内的先导控制阀进行设置。

先导油供油可通过外部（先导油油口 X）或内部（经先导油油口 X 或 Z2 从油口 A）实现。

先导控制弹簧腔通过卸压经油口 Y 或 Z1 导入到油箱。

油路示例

示例 1： （用于低压系统基于压力卸载的油路）

系统通过高压泵和低压泵供给。系统压力 pS 经先导油油口在外部从高压侧作用在先导控制阀上，其在达到调定压力值后设置卸压油路的低压侧。单向阀 RV（不包括在交付范围内）保护高压系统与现有卸压低压系统的连接。

当达到先导控制弹簧上设定的压力时，将切换先导控制阀，并卸载油箱主阀的弹簧腔。主阀芯打开，并释放 A 至 B 的连接。

在型号 LFA..DZW... 中，可通过电动先导控制阀（不包括在 LFA..DZ... 型控制盖的交付范围内）选择除液压油路之外的所需切换位置。

示例 2： （用于次级系统基于压力的连接的油路）

通过此油路，当系统 1 中的压力未达到指定值之前，不会连接系统 2。先导油排放从主阀油口 A 内部实现。





力士乐REXROTH逻辑单元，压力作用

力士乐REXROTH插装阀

力士乐REXROTH插装阀，压力作用LC..DB

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R900929000 LC100DB120E6X/-118

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二通插装阀是一种较新型的液压控制元件，

它适用于高压大流量的液压系统中，与普通液阀相比,它有以下优点:

(1)结构简单、紧凑、工艺性好，流动流阻小;(2)通流能力大,适用于大流量场合;(3)阀芯动作灵敏，响应快;(4)密封性能好,泄漏少;(5)工作可靠,抗污染能力强，寿命长;(6)适用于各种液压介质:如液压油、乳化液、水质;(7)便于实现集成化，能高度集成，适于与数字元件、比例元件及计算机组合使用，实现自动控制;(8)便于实现标准化、系统化、通用化。

由于二通插装阀具有独特的优点，因此它被广泛应用于重型机械、锻压机械、塑料机械、冶金机械、船舶、工程机械、矿山机械等领域。



基本结构

二通插装阀与普通液压阀的功能相同，都是用来控制液压系统工作介质的压力、流量和流动方向的。二通插装阀由插入元件、先导元件、控制盖板和插装块体四部分组成。插入元件主要由阀芯、阀套、弹簧和密封件组成，图1为其示意图。控制盖板上,根据插装阀的不同控制功能，安装有相应的先导控制级元件，以实现对液压系统压力、流量和方向的控制,插装块体则既是嵌入插入元件及安装控制盖板的基础阀体，又是主油路和控制油路的通道体。

二通插装阀通过不同的盖板和各种先导阀(一般为滑阀)组合，即可构成方向控制阀、压力控制阀和流量控制阀。

二通插装阀液压系统实例分析

二通插装阀以其独特的优点以及经济和技术上的明显优势被广泛应用到各个行业。在集成的液压元件中，当通径小于32mm时，可采用叠加

阀，当通径大于中32mm时，应考虑采用插装阀。在一个液压系统中,可根据需要，液压控制阀全部采用二通插装阀;也可以部分液压控制阀采用滑阀式，另一部分液压控制阀采用二通插装阀，充分发挥两种液压控制阀各自的优点。

压力机械属于重型机械，主要应用于冶金行业.重型机械制造、化工等行业，如冲压机、锻造机、剪切机、粉末制品压力机、挤压机等。压力机械的动力及控制部分多数采用液压传动,由于液压系统所需的压力高、流量大，故适于用二通插装阀来控制液压系统的压力、流量和流动方向。



使用二通插装阀的粉末制品液压机液压系统分析

控制上液压缸的液压阀采用了二通插装阀，

控制下液压缸的液压阀采用了滑阀。粉末制品液压机与普通液压机有所不同，下缸装有控制活塞高位置的限程机构，调节限程机构，可控制模具中的装料量。下缸带有中心缸，以满足不同制品的工艺要求。

由于主机各液压缸的大小和速度相差较大，所需流量也有较大差别，液压系统采用压力补偿轴向柱塞变量泵，可以根据负载的大小，自动变换泵输出的流量,以适应不同工作状态压力和流量的不同要求。液压控制阀采用了二通插装阀与滑阀混合使用，以发挥两种控制阀各自的优点。在液压系统中，上缸液压系统需要大流量,使用了二通插装阀，下缸液压系统需要小流量,使用滑阀，以降低成本。



使用二通插装阀的液压机液压系统分析

液压机液压系统因其压力高，流量大，液压控制阀适于采用二通插装阀,YA液压机液压系统原理，液压系统的液压控制阀全部采用二通插装阀。系统采用双泵供油，泵1为低压大流量泵,用于上缸和下缸的快速行程;泵2为高压小流量泵，用于系统实现压制及保压。液压系统控制部分包括七个集成块。泵1的调压、安全、卸荷及防止油液倒流由集成块②控制，泵2的调压、安全、卸荷由集成块①控制;上缸运动由集成块⑤和⑥控制;下缸运:动由集成块③和④控制;送料缸由集成块⑦控制。

由于液压系统控制阀除送料缸液压系统外，其余部分采用了二通插装阀;集成块,使液压系统结构紧凑、简单,便于安装、调试和维护。系统的工作性能得以改善:速度快、稳定性好、响应快、精度高,系统配以计算机控制,可方便地实现自动控制。





联系我时，请说是在易船商圈上看到的，谢谢！