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阀、插装阀、比例阀等
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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最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R431003427 R431003427 R431003427
R431003427 R431003427 R431003427
力士乐司钻阀定位 HD-2-FX/P50970-3/R431002825
力士乐司钻阀复位 HD-2-X/P50973-1/R431002831
力士乐油门气缸 P60266-1/R431005441
力士乐控油门阀 P50208-1/R431002613
力士乐八位换档气缸 P55557-3/R431003808
力士乐八位换档阀 P55556-3/R431003806
力士乐组合阀 HC-2-X/P50975-3/R431002837
力士乐 两位三通阀 2-HA-1/P59331/R431004994
力士乐三位四通阀 2-HA-2/P59335/R431005003
力士乐手柄换向阀 2-HA-3/P61266-1/1 R431005733
力士乐两位三通导气阀 2-HA-1L/R431004997
力士乐三位四通导气阀 2-HA-2Z/R431005013
力士乐手轮调压阀 H-4/P050967-2
力士乐二位三通脚控阀 IA-198/2-BA-1/P54692-2/R431003427
力士乐三位四通阀 PD40041-0098/R431008258
力士乐转盘组合阀 P51612-3/R431002914
力士乐脚踏油门阀 P52971-1/R431003063
力士乐调压阀 6-S NPT3/4/P-055162/R431003665
二位三通脚控阀 P54692-2 R431003427
二位三通脚控阀 P54692-2 R431003427
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REXRTOH气缸,力士乐单作用气缸两个的区别就是一个带弹簧,一个不带弹簧。图里面的有两个气体管路,下面是动作原理:
2 h3 X1 D% ^# c. J( r压缩空气从气口(B)进入气缸两活塞(C)之间中腔时,使两活塞分离向气缸两端方向移动,迫使两端的弹簧压缩,两端气腔的空气通过气口(A)排出,同时使两活塞(C)的齿条同步带动输出轴(D)(齿轮)逆时针方向旋转90度。在压缩空经过电磁阀换向后,气缸的两活塞在弹簧的弹力下向中间方向移动,中间气腔的空气从气口(B)排出,同时使两活塞(C)的齿条同步带动输出轴(D)(齿轮)顺时针方向旋转90度。可以从两端调整微量角度,松动螺母(E)用内六角扳手拧动调节螺栓(F)调整所需角度, 锁紧螺母(E)。
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1/4二位三通手动换向阀 P59331(1/4) R431004994
1/4脚踏油门阀 P52971-1 R431003063
1/4手动换档阀 P5556-3 R431003806
1/4转盘组合阀 P51612-3(1/4) R431002914
主滚筒组合阀 P50970-1 R431002823
1/4脚踏油门阀 P50208-1 R431002613
三位四通阀 P59335 R431005003
手轮调压阀 H-4/P050967-2 R431002819
三位四通阀 PD40041-0098 R431008258
八位气缸 P55557-3 R431003808
三位四通阀 HC-2-X/P50975-3 R431002837
P061966-00000 R431005927
P057378-00375 R431004053
司钻阀 P050973-0003 R431002833
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司钻阀 P050973-1 R431002831
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转盘组合阀 P55582-3 R431003826
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R431005006 导气阀 P059339-0 R431005013
油门控制器 P060266-1 R431005441
R431005733
P068521-00002 R431007308 直动式,不带电子位置反馈
控制电子元件 不带内装式控制电子元件
通径 10 通径 10接口位置,按 ISO 4401,编码: 4401-05-04-0-94
阀芯 W1- 阀芯重叠和阀芯开口如 W 阀芯,带流量比例 2:1 (A:B)
流量 60 60 L/min, 阀压力降 = 10 bar
系列 2X 系列 20 至 29
电压 G24 供电电压 24V DC
手动应急操作装置 N9 配有隐蔽式手动应急操作装置
特殊保护型式 不带特殊保护型式
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