0820059111力士乐REXROTH气动阀

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0820059111力士乐REXROTH气动阀 力士乐气动阀   气动控制阀的结构特性

气动控制阀的结构可分解成阀体(包含阀座和阀孔等)和阀心两部分，根据两者的相对位置，有常闭型和常开型两种。阀从结构上可以分为：截止式、滑柱式和滑板式三类阀。

 

（一）截止式阀的结构及特性

 

截止式阀的阀心沿着阀座的轴向移动，控制进气和排气。图4.2所示为二通截止式阀的基本结构。图4.2a中，在阀的P口输入工作气压后，阀芯在弹簧和气体压力作用下紧压在阀座上，压缩空气不能从A口流出；图4.2b为阀杆受到向下的作用力后，阀芯向下移动，脱离阀座，压缩空气就能从P口流向A口输出。这就是截止式阀的切换原理。

下离开阀座，压缩空气从P口流向A口输出。图4.3b为工作状态，阀杆在向上的力作用下，阀心紧压在阀座上关闭阀口，流道被关断，A口没有压缩空气流出。

图4.4所示为三通截止式阀的结构，阀有P、A、0三个孔口。图4.4a为阀的初始状态，阀心紧压在上阀座上，P口和A口通路被关断，A口和0口相通。阀的输出A口没有输出。

图4.4b为工作状态。阀杆受力后使阀心离开上阀座而紧压在下阀座上，关闭排气O口，打开P口至A口之间的通道，压缩空气从P口流向A口输出。图4.4c所示为阀在切换过程中阀心所处的瞬态位置。此时，P、A、0三个孔口同时相通，而发生串气现象。实际上，对于快速切换的阀，这种串气现象对阀的动作不存在什么影响。但缓慢切换时，应予以注意。

截止式阀的结构决定了其开启所需的时间较短，但开启大口径的阀则需较大的开启力。因此截止式阀多用于****的阀。需要大流量或高压时，往往采取先导式的结构。其方法是增加一个控制活塞，先导控制气压作用在活塞上产生的较大操纵力，以弥补上述缺点。

 

为了使截止式阀密封可靠，操纵方便，另一种方法是采用压力平衡的方法，如图4.5所示，在阀杆两侧增加了活塞，活塞受气压作用面积和阀心受压面积相等，这种阀称为压力平衡式阀。由于初始状态时，工作气压作用在阀杆上的合力为零，使开启阀门的操作力大大降低。

（二）滑柱式阀的结构及特性

滑柱式阀是用圆柱状的阀心在圆筒形阀套内沿轴向移动，从而切换气路。图4.6所示为滑柱式阀的基本结构。图4.6左图为阀的初始状态，滑柱在弹簧力的作用下右移。此时，压缩空气从输人口P流向输出口A，A口有气压输出，B口无气压输出。图4.6右图为阀的工作状态；滑柱在操纵力作用下克服弹簧力左移，关断P口和A口通路，接通P口和B口。于是，B口有输出，A口无输出。

 

滑柱式阀在结构上只要稍稍改变阀套或滑柱的尺寸、形状就能实现两位四通和两位五通阀的功能。

4.2

方向控制阀

一、方向控制阀概述

（一）操作方式

 

为了使阀换向，必须对阀心施加一定大小的轴向力。使其迅速移动改变阀心的位置。这种获得轴向力的方式叫做换向阀的操作方式，或控制方式。通常可分为气压、电磁、人力和机械四种操作方式。

 

1．气压操作

用气压力来获得轴向力使阀心迅速移动换向的操作方式叫做气压操作。它按施加压力的方式可分为加压控制、卸压控制、差压控制和时间控制。

1)加压控制是指施加在阀心控制端的压力逐渐升到一定值时，使阀心迅速移动换向的控制，阀心沿着加压方向移动。

 

2)卸压控制是指施加在阀心控制端的压力逐渐降到一定值时，阀心迅速换向的控制，常用作三位阀的控制。

 

3)差压控制是指阀心采用气压复位或弹簧复位的情况下，利用阀心两端受气压作用的面积不等(或两端气压不等)而产生的轴向力之差值，使阀心迅速移动换向的控制。其原理如图4.7所示，K1为控制气压口。

图4.10

延长法的四种状态

ａ）常断延长通型　ｂ）常通延长断型

ｃ）常通延长通型　ｄ）常断延长断型

 

 

这种控制方式只需一个控制信号，故得到广泛的应用，可应用于各种结构的主阀．。气压复位省去了弹簧，提高了可靠性。差压控制的特点是所控制的主阀不具有记忆功能，且控制信号和复位信号均须为长信号。

 

4)时间控制是指利用气流向由气阻(节流孔)和气容构成的阻容环节充气，经过一定时间后，当气容内压力升至一定值时，阀心在差压力作用下迅速移动换向的控制。

 

时间控制的信号输出有脉冲信号和延长信号两种。图4.8所示为脉冲阀原理图，在阀的P口输入气压信号后，A口即有输出，同时气流经节流孔向气室充气，当气容内的压力上升到阀的切换压力时，活塞向左移关断P—A通路，A口无输出，即阀的A口输出为脉冲信号。脉冲信号的宽度决定于节流孔和气室的大小。

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HF03M1 BRGRAR0821739635 VTS HF03M1 BRARAR0821739636 VTS HF03M1 BRAR0821739637 VTS HF03M1 BRARARARARARAR0821739638 VTS HF03M1 BRBRBRBRBRARARARARAR0821739639 VTS HF03M1 ARARARARARGR0821739640 VTS HF03M1 ARYARYARYARARARBRXX0821739641 VTS HF03M1 HRGRHRDRDRDRGRGRXX0821739642 VTS HF03M1 GRARARARARGRGRBRBRBRBRX0821739643 VTS HF03M1 ANANANANANANANANANANAN0821739644 VTS HF03M1 DNDNDNDNDNDNDNDNDNDNDNDNDNDN 0821739645 VTS HF03M1 HNHNININBNBN0821739646 VTS HF03M1 DNDNDNDNDNDNDNDNDNDNDNDNDNDN 0821739647 VTS HF03M1 GNGNGNGNGNGNGNGNGNGNGNGNGNGN 0821739648 VTS HF03M1 ARBRBRBRARARXXBRBRARBRXX0821739649 VTS HF03M1 IRIRXXGRX0821739650 VTS HF03M1 BRBRBRBRDR0821739651 VTS HF03M1 BRBRBRBRBRARBRARXARBRBRARX0821739652 VTS HF03M1 GRBRARARBRARARBRARX0821739653 VTS HF03M1 GRGRGRBRARARBRARARBRARX0821739654 VTS HF03M1 GRGRGRARBRARBRARARARBRARARX0821739655 VTS HF03M1 CNCNCNCNCNCNCNCNCNCNCNCNCNCN 力士乐Rexroth节流阀：REXROTH单向力士乐节流阀、力士乐6通经 10通经单向节流阀、力士乐(BOSCH_REXROTH)DR系列单向节流阀、力士乐(BOSCH-REXROTH)SV系列单向节流阀、力士乐Rexroth双单向节流阀、力士乐REXROTH叠加单向节流阀、力士乐Rexroth叠式节流阀、力士乐Rexroth液控节流阀Z2S系列、力士乐rexroth节流阀、力士乐单向节流阀，rexroth单向阀、力士乐单向节流阀、力士乐带集成放大器比例节流阀rexroth、力士乐节流阀，rexroth节流阀、力士乐节流阀、博世力士乐rexroth 二通比例节流阀、博世力士乐rexroth单向节流阀、博世力士乐rexroth准确节流阀F6型、博世力士乐rexroth节流阀 单向阀、博世力士乐叠加式节流阀 两路节流单向阀、博世力士乐节流阀、叠加式双单向节流阀、德国力士乐REXROTH(液压阀)单向节流阀、比例节流阀、节流和单向节流阀、力士乐节流阀力士乐液压阀：Bosch Rexroth比例阀 齿轮泵、Bosch-Rexroth比例液压阀、力士乐rexroth电磁阀、力士乐放大板、力士乐电磁换向阀、力士乐电磁溢流阀、博世力士乐rexroth单向节流阀、博世力士乐rexroth压力继电器、博世力士乐rexroth齿轮泵、博世力士乐液压备件、德国Bosch Rexroth比例伺服阀、德国博世力士乐rexroth液压阀、德国博世力士乐rexroth电磁阀 柱塞泵 力士乐气动阀  REXROTH气动阀 力士乐气动元件 REXROTH气动元件 力士乐气动产品Rexroth气动产品 力士乐气动 REXROTH力士乐 博世力士乐气动 BOSCH力士乐气动 BOSCH-REXROTH气动力士乐伺服驱动器 力士乐伺服驱动 力士乐变频器 博世力士乐伺服驱动 博世力士乐变频器 博世变频器 BOSCH-REXROTH伺服驱动 BOSCH-REXROTH伺服驱动控制器 REXROTH伺服驱动控制器 力士乐伺服电机  力士乐异步电机 力士乐三相同步电机 REXROTH伺服电机 REXROTH i/o模块 力士乐IO模块 BOSCH-REXROTH伺服电机 REXROTH伺服电机 REXROTH伺服控制 REXROTH PLC模块 REXROTH工业PC 力士乐工业PC 力士乐工业CPU REXROTH工业CPU 力士乐数控系统 REXROTH数控系统 力士乐数控驱动 REXROTH数控驱动 力士乐驱动系统 REXROTH驱动系统 力士乐驱动控制器 REXROTH驱动控制器 博世REXROTH驱动系统