力士乐减压阀DR6DP2-5X/75YM

力士乐减压阀DR6DP2-5X/75YM 德国博世力士乐REXROTH减压阀 直动式减压阀 先导式减压阀

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力士乐减压阀DR6DP2-5X/75YM

活塞式减压阀

该类型的减压阀集两种阀―导阀和主阀―于一体。导阀的设计与直接作用式减压阀类似。来自导阀的排气压力作用在活塞上，使活塞打开主阀。如果主阀较大，无法直接打开时，这种设计就会利用入口压力打开主阀。因此，这种类型的减压阀，与直接作用式减压阀相比，在相同的管道尺寸下，容量和较好度（ /-5%）更高。与直接作用式减压阀相同的是，减压阀内部感知压力，无须外部安装传感线。

安装步骤

1、关闭减压阀前的闸阀，开启减压阀后的闸阀，制造下游低压环境；

2、将调节螺钉

按逆时针旋转至较上位置（相对较低出口压力），然后关闭减压阀后闸阀；

3、慢慢开启减压阀前的闸阀至全开；

4、顺时针慢慢旋转调节螺钉，将出口压力调至所需要的压力（以阀后表压为准）；调整好后，将锁紧

螺母锁紧，打开减压阀后闸阀；

5、如在调整时出口压力高于设定压力，须从较好步开始重新调整，即只能从低压向高压调。

减压阀的出口压力是用来控制电液换向阀或外控顺序阀等的控制油液压力大小的，当电液换向阀或外控顺序阀换向或工作后，减压阀出油口流量变为零，但压力还需保持原先调定的压力。这种情况下，因阀出口流量为零，流经减压口的流量只有先导流量。由于先导流量很少，一般在2L/min之内，因此主阀减压口基本上接近全关位置（开度极小），先导流量由三角槽或斜锥面处流出，如果主阀芯配合过松或磨损过大，则泄漏量增加。

力士乐减压阀DR6DP2-5X/75YM

DR 6 DP型阀是三通版本的直动式减压阀，即。e。二次回路的压力限制。

它用于降低系统压力。使用调节类型（4）设置二次压力。

阀门在初始位置打开。液压油可以不受限制地从通道P流向通道A。通道A中的压力同时通过控制管路（6）在与压缩弹簧（3）相对的活塞区域施加。如果通道A中的压力超过在压缩弹簧（3）上设定的值，则控制阀芯（2）进入控制位置，并将通道A中的设定压力保持在恒定水平。

信号油和先导油通过控制管路（6）从通道A内部供应。

如果通道A中的压力由于执行器上的外力作用而进一步增加，则它将控制阀芯（2）进一步推向压缩弹簧（3）。

这样，通道A通过控制阀芯（2）上的控制边（8）连接到通道T（Y）。液压油被排放到油箱中，压力只能稍微增加一点。

从弹簧腔（7）排出的泄漏油总是通过通道T（Y）从外部进行。

为了从通道A自由流回通道P，可以选择安装一个止回阀（5）。

压力表接口（1）可以控制次级压力。

类型DR 6 DP1-5X / .Y…

力士乐减压阀DR6DP2-5X/75YM型号

力士乐REXROTH直动式减压阀DR 6 DP

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力士乐REXROTH直动式减压阀DR 6 DP…XC

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重锤杠杆式安全阀是利用重锤和杠杆来平衡作用在阀瓣上的力。根据杠杆原理，它可以使用质量较小的重锤通过杠杆的加大作用获得较大的作用力，并通过移动重锤的位置(或变换重锤的质量)来调整安全阀的开启压力。重锤杠杆式安全阀结构简单，调整容易而又比较准确，所加的载荷不会因阀瓣的升高而有较大的增加，适用于温度较高的场合，过去用得比较普遍，特别是用在锅炉和温度较高的压力容器上。但重锤杠杆式安全阀结构比较笨重，加载机构容易振动，并常因振动而产生泄漏；其回座压力较低，开启后不易关闭及保持严密。