主营:REXROTH电磁阀,PARKER比例阀,ATOS柱塞泵,DUPLOMATIC溢流阀,贝加莱伺服控制器,本特利电涡流传感器
2024/10/24 13:49:20来源:13524125780手机微信点击数:201次
2FRM10-3X/50L调速流量阀 德国博世力士乐REXROTH单向阀 流量控制阀
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2FRM10-3X/50L调速流量阀
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。
2FRM10-3X/50L调速流量阀
单向调速阀基本由以下部件构成:壳体(1)、主提升阀(2)、先导部分(3)、先导滑阀(4)、阻尼滑阀(5)和先导阻尼阀(6)。
通过自由流动
将负载从 A 提升至 B 时,主滑阀(2)打开。如果负载压力出现问题(如:方向阀与油口 A之间管路破裂),主滑阀(2)会立即关闭。将负载侧(7)与弹簧腔8)连接起来,即可实现此功能。
降低负载(回路示例)
流动方向是从 B 流至 A。油口 A 通过方向阀连接到油箱。气缸活塞杆侧的流量与工况相对应。油口 X 上的控制压力与油口 B 上的负载压力 之间的关系为= 1:20.
达到控制压力时,主滑阀会提前打开。通过控制滑阀(4),将先导级(3)抬起,其底座和腔室(8)通过此钻孔和油口 A 减压到油箱中。同时,油口 B 内的负载压力不再施加到腔室(8)上,而是在主滑阀内。主提升阀(2)上的负载因此被卸除。位于主提升阀(2)上的控制滑阀(4)的背面,抵靠在阻尼滑阀(5)轴环上。
油口 X 上用于开启 B 到 A 所需的压力此刻仅受腔室(9)内的弹簧影响。用于开启 B 到 A 连接所需的压力为 20 bar;要完全开启此连接,较大需要 70 bar 的压力,具体情况视型号而定。
控制流量的开口横截面逐渐增加。通过以下方式实现:衬套和主提升阀(2)的径向钻孔依次打开。
控制压力、破裂压力和压差之间的关系确定了通过 B 到 A的连接流入致动器的流量。因此,防止了致动器出现不受控制的情况。
即使方向阀与油口 A 之间出现管道破裂,也不会影响到下降程序的控制。
影响单向调速阀开启和关闭时间的指导原则
通过位于控制滑阀(4)中以及阻尼滑阀(5)两侧的节流孔(6)调整开启顺序。节流孔(6)受筛网保护。
单向调速阀的关闭动作实际上是无节流的。
当与气缸结合使用时,连接到油口 X 的控制管路可装配一个节流止回阀(出口节流控制),以控制关闭顺序。
当与马达结合使用时,无需在连接到油口 X的控制管路中装配节流止回阀。在这种情况下,建议对方向阀的控制时间进行干预。
2FRM10-3X/50L调速流量阀单向阀供应型号
力士乐REXROTH二通流量控制阀2FRM
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力士乐REXROTH二通流量控制阀2FRH
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力士乐REXROTH双向流量控制阀2FRW
平衡阀是一种特殊功能的阀门,阀门本身无特殊之处,只在于使用功能和场所有区别。 在某些行业中,由于介质(各类可流动的物质)在管道或容器的各个部分存在较大的压力差或流量差,为减小或平衡该差值,在相应的管道或容器之间安设阀门,用以调节两侧压力的相对平衡,或通过分流的方法达到流量的平衡,该阀门就叫平衡阀。
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