2FRM6B36-3X/16QRV调速控制阀

2FRM6B36-3X/16QRV调速控制阀 德国博世力士乐REXROTH调速阀 二通调速阀 流量控制阀

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2FRM6B36-3X/16QRV调速控制阀

一般信息

2型FRM流量控制阀是2通流量控制阀。

它用于保持恒定流量，而与压力和温度无关。

该阀主要由壳体（1），旋钮（2），节流孔衬套（3），压力补偿器（4）和可选的止回阀组成。

 

流量控制阀类型2FRM 6 B…MV

（无外部关闭，无止回阀）

从通道A到通道B的流量在节流点（5）受到节流。通过旋转旋钮（2）设置节气门横截面。为了确保通道B中的压力单独且恒定，在节流点（5）的下游安装了一个压力补偿器（4）。

当没有流量通过阀时，压缩弹簧（6）向下将压力补偿器（4）压向其止挡，并将压力补偿器（4）保持在打开位置。当流体流过阀时，作用在通道A中的压力会通过节流孔（7）向压力补偿器（4）施加力。

压力补偿器（4）进入受控位置，直到力平衡。如果通道A中的压力升高，则压力补偿器（4）沿关闭方向移动，直到力再次平衡。由于压力补偿器（4）的这种连续补偿，获得了恒定的流量。

为了在两个方向上控制通过阀的流量，可以在此流量控制阀下方安装Z4S 6型整流器夹心板。

流量控制阀

功用:通过改变阀口过流面积来调节输出流量，从而控制执行元件的运动速度。

分类:节流阀、调速阀、温度补偿调速阀、分流集流阀。

常用节流口结构有锥形、三角槽形、矩形、三角形等。由节流方程知，当压力差.定时，改变开口面积即改变液阻就可改变流量。

节流阀实质相当于-一个可变节流口，借助控制机构使阀芯相对于阀体孔运动改变阀口的过流面积。

结构原理

主要零件有阀芯、阀体和螺母。阀体上右边是进油口，左边是出油口。阀芯一端开有三角尖槽，另-端加工有螺纹，旋转阀芯即可轴向移动改变阀口过流面积。为平衡液压径向力，三角槽须对称布置。

调速阀定差减压阀与节流阀串联而成，用来调节通过的流量自动补

偿负载变化的影响。

2FRM6B36-3X/16QRV调速控制阀

力士乐REXROTH流量控制阀

力士乐REXROTH双向流量控制阀2FRM6A

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力士乐REXROTH二通流量控制阀2FRM

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调速阀是进行了压力补偿的节流阀。它由定差减压阀和节流阀串联而成。节流阀前、后的压力p2和p3分别引到减压阀阀芯右、左两端，当负载压力p3加大，于是作用在减压阀芯左端的液压力加大，阀芯右移，减压口加大，压降减小，使p2也加大，从而使节流阀的压差（p2-p3）保持不变；反之亦然。这样就使调速阀的流量恒定不变（不受负载影响）。

节流阀，是调节和控制阀内开口的大小直接限制流体通过的流量达到节流的目的。 调速阀，是在节流阀节流原理的基础上，又在阀门内部结构上增设了一套压力补偿装置，改善节流后压力损失大的现象，使节流后流体的压力基本上等同于节流前的压力，并且减少流体的发热。

调速阀常见问题及解决方法

1、 流量不稳定

减压节流型调速阀当节流口调整好锁紧后，有时会出现流量不稳定现象，特别在较小稳定流量时更易发生。主要原因是锁紧装置松动，节流口部分堵塞，油温升高，进、出油腔较小压差过低和进、出油腔接反等。因此在使用时要注意进、出油腔的位置，避免接反。

2、流量调节失灵

这是指调整节流调节部分，出油腔流量不发生变化，其主要原因是阀芯径向卡住和节流调节部分发生故障等。如果发生阀芯卡住或节流调节部分故障时，应进行清洗和修复。

3、 内泄漏量加大

减压节流型调速阀节流口关闭时，是靠间隙密封，因此不可避免有一定的泄漏量，故它不能作为用。当密封面（减压阀芯、节流阀芯和芯密封面等）磨损过大后，会引起内泄漏量增加，使流量不稳定，特别会影响到较小稳定流量。