0820059103現(xiàn)貨REXROTH氣動閥

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0820059103現(xiàn)貨REXROTH氣動閥 力士樂氣動閥   氣動控制閥的結(jié)構(gòu)特性

氣動控制閥的結(jié)構(gòu)可分解成閥體(包含閥座和閥孔等)和閥心兩部分，根據(jù)兩者的相對位置，有常閉型和常開型兩種。閥從結(jié)構(gòu)上可以分為：截止式、滑柱式和滑板式三類閥。

 

（一）截止式閥的結(jié)構(gòu)及特性

 

截止式閥的閥心沿著閥座的軸向移動，控制進氣和排氣。圖4.2所示為二通截止式閥的基本結(jié)構(gòu)。圖4.2a中，在閥的P口輸入工作氣壓后，閥芯在彈簧和氣體壓力作用下緊壓在閥座上，壓縮空氣不能從A口流出；圖4.2b為閥桿受到向下的作用力后，閥芯向下移動，脫離閥座，壓縮空氣就能從P口流向A口輸出。這就是截止式閥的切換原理。

下離開閥座，壓縮空氣從P口流向A口輸出。圖4.3b為工作狀態(tài)，閥桿在向上的力作用下，閥心緊壓在閥座上關(guān)閉閥口，流道被關(guān)斷，A口沒有壓縮空氣流出。

圖4.4所示為三通截止式閥的結(jié)構(gòu)，閥有P、A、0三個孔口。圖4.4a為閥的初始狀態(tài)，閥心緊壓在上閥座上，P口和A口通路被關(guān)斷，A口和0口相通。閥的輸出A口沒有輸出。

圖4.4b為工作狀態(tài)。閥桿受力后使閥心離開上閥座而緊壓在下閥座上，關(guān)閉排氣O口，打開P口至A口之間的通道，壓縮空氣從P口流向A口輸出。圖4.4c所示為閥在切換過程中閥心所處的瞬態(tài)位置。此時，P、A、0三個孔口同時相通，而發(fā)生串氣現(xiàn)象。實際上，對于快速切換的閥，這種串氣現(xiàn)象對閥的動作不存在什么影響。但緩慢切換時，應(yīng)予以注意。

截止式閥的結(jié)構(gòu)決定了其開啟所需的時間較短，但開啟大口徑的閥則需較大的開啟力。因此截止式閥多用于****的閥。需要大流量或高壓時，往往采取先導(dǎo)式的結(jié)構(gòu)。其方法是增加一個控制活塞，先導(dǎo)控制氣壓作用在活塞上產(chǎn)生的較大操縱力，以彌補上述缺點。

 

為了使截止式閥密封可靠，操縱方便，另一種方法是采用壓力平衡的方法，如圖4.5所示，在閥桿兩側(cè)增加了活塞，活塞受氣壓作用面積和閥心受壓面積相等，這種閥稱為壓力平衡式閥。由于初始狀態(tài)時，工作氣壓作用在閥桿上的合力為零，使開啟閥門的操作力大大降低。

（二）滑柱式閥的結(jié)構(gòu)及特性

滑柱式閥是用圓柱狀的閥心在圓筒形閥套內(nèi)沿軸向移動，從而切換氣路。圖4.6所示為滑柱式閥的基本結(jié)構(gòu)。圖4.6左圖為閥的初始狀態(tài)，滑柱在彈簧力的作用下右移。此時，壓縮空氣從輸人口P流向輸出口A，A口有氣壓輸出，B口無氣壓輸出。圖4.6右圖為閥的工作狀態(tài)；滑柱在操縱力作用下克服彈簧力左移，關(guān)斷P口和A口通路，接通P口和B口。于是，B口有輸出，A口無輸出。

 

滑柱式閥在結(jié)構(gòu)上只要稍稍改變閥套或滑柱的尺寸、形狀就能實現(xiàn)兩位四通和兩位五通閥的功能。

4.2

方向控制閥

一、方向控制閥概述

（一）操作方式

 

為了使閥換向，必須對閥心施加一定大小的軸向力。使其迅速移動改變閥心的位置。這種獲得軸向力的方式叫做換向閥的操作方式，或控制方式。通�？煞譃闅鈮�、電磁、人力和機械四種操作方式。

 

1．氣壓操作

用氣壓力來獲得軸向力使閥心迅速移動換向的操作方式叫做氣壓操作。它按施加壓力的方式可分為加壓控制、卸壓控制、差壓控制和時間控制。

1)加壓控制是指施加在閥心控制端的壓力逐漸升到一定值時，使閥心迅速移動換向的控制，閥心沿著加壓方向移動。

 

2)卸壓控制是指施加在閥心控制端的壓力逐漸降到一定值時，閥心迅速換向的控制，常用作三位閥的控制。

 

3)差壓控制是指閥心采用氣壓復(fù)位或彈簧復(fù)位的情況下，利用閥心兩端受氣壓作用的面積不等(或兩端氣壓不等)而產(chǎn)生的軸向力之差值，使閥心迅速移動換向的控制。其原理如圖4.7所示，K1為控制氣壓口。

圖4.10

延長法的四種狀態(tài)

ａ）常斷延長通型　ｂ）常通延長斷型

ｃ）常通延長通型�。洌┏�斷延長斷型

 

 

這種控制方式只需一個控制信號，故得到廣泛的應(yīng)用，可應(yīng)用于各種結(jié)構(gòu)的主閥．。氣壓復(fù)位省去了彈簧，提高了可靠性。差壓控制的特點是所控制的主閥不具有記憶功能，且控制信號和復(fù)位信號均須為長信號。

 

4)時間控制是指利用氣流向由氣阻(節(jié)流孔)和氣容構(gòu)成的阻容環(huán)節(jié)充氣，經(jīng)過一定時間后，當(dāng)氣容內(nèi)壓力升至一定值時，閥心在差壓力作用下迅速移動換向的控制。

 

時間控制的信號輸出有脈沖信號和延長信號兩種。圖4.8所示為脈沖閥原理圖，在閥的P口輸入氣壓信號后，A口即有輸出，同時氣流經(jīng)節(jié)流孔向氣室充氣，當(dāng)氣容內(nèi)的壓力上升到閥的切換壓力時，活塞向左移關(guān)斷P—A通路，A口無輸出，即閥的A口輸出為脈沖信號。脈沖信號的寬度決定于節(jié)流孔和氣室的大小。

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BRBRBRBRARARBRBRBRBRBRBRBRBR 0821739302 VTS HF03M1 GRBRBRGRBRBRBRBRBRXXX0821739303 VTS HF03M1 BRBRBRBRBRBRXXXXXX0821739304 VTS HF03M1 BRBRGRBRBRBRBRBRBRXXX0821739305 VTS HF03M1 BRBRBRBRBRBRGRBRBRXXX0821739306 VTS HF03M1 BRBRBRBRBRBRBRBRXXXX0821739307 VTS HF03M1 GRBRGRDRBRDRGRBRBRBRBRBRBRBR 0821739308 VTS HF03M1 BRBRBRBRBRBRBRBRBRBRBRBRBRGR 0821739309 VTS HF03M1 ANANAN0821739310 VTS HF03M1 CRCRCRCRCRCR0821739311 VTS HF03M1 BRBRBRBRBRBRGRGRGR0821739312 VTS HF03M1 BRBRBR0821739313 VTS HF03M1 BRBRBRBRBRAR0821739314 VTS HF03M1 BRBRBRARAR0821739315 VTS HF03M1 ANANANANBNBNBN0821739316 VTS HF03M1 GRGRBRARARARXAR0821739317 VTS HF03M1 BNBNBNBNHNANXYDNXBNANHN0821739318 VTS HF03M1 BNANANBNBNBNANANANX0821739319 VTS HF03M1 ANCNBNBNBNXBNXBN0821739320 VTS HF03M1 GNGNDNGNX0821739321 VTS HF03M1 DNANANXANX0821739322 VTS HF03M1 ANANBNXBNHNHNBNX0821739323 VTS HF03M1 BNBNBNBNXX0821739324 VTS HF03M1 ARARXX0821739325 VTS HF03M1 BRBRBRBRXX0821739326 VTS HF03M1 GRYGRXGRGR0821739327 VTS HF03M1 GRGRBRARXX0821739328 VTS HF03M1 ANBNBNBNBNBNGN0821739329 VTS HF03M1 BNBNBNGNGN0821739330 VTS HF03M1 BNBN0821739331 VTS HF03M1 BNBNBNBNBNGN0821739332 VTS HF03M1 BNBNBNBNBNBNBNGN0821739333 VTS HF03M1 ARARARARXXARARARARXXXXX0821739334 VTS HF03M1 ARARARARARARARARARARARARXXX0821739335 VTS HF03M1 ARARARARARARARARARARARARARAR 0821739336 VTS HF03M1 ANANANANANANANANANANBN0821739337 VTS HF03M1 ARARARARARARBRARARARARBR0821739338 VTS HF03M1 CRBRBRBRBRBRXX0821739339 VTS HF03M1 BRBRBRBRBRARBRBRDRBRBRBRBRBR 0821739340 VTS HF03M1 BNBNBNBNBNBNBN0821739341 VTS HF03M1 HRHRIRIRBNBN0821739342 VTS HF03M1 BRBRARARARARARARARARARARARAR 0821739343 VTS HF03M1 ARARARARARARARARARARARARARAR 0821739344 VTS HF03M1 BRBRBRBRARARARARARARARARARAR 0821739345 VTS HF03M1 DRBRARARARARARARARARARARGRGR 0821739346 VTS HF03M1 DNBNDNBNBNBNBNDNDNBNBNBNXX0821739347 VTS HF03M1 IRGRGRGRGR0821739348 VTS HF03M1 XARARARARARARARARARARARARAR0821739349 VTS HF03M1 BNBNBNBN0821739350 VTS HF03M1 BRBRBRBRBRBRBRBR0821739351 VTS HF03M1 GRGRGR0821739352 VTS HF03M1 GRBRBRGRGR0821739353 VTS HF03M1 GRARARARGRBRARBRAR0821739354 VTS HF03M1 GRBRBRGRAR0821739355 VTS HF03M1 GRBRGRGRBR0821739356 VTS HF03M1 ARBRBRBRBRARARBR0821739357 VTS HF03M1 ARARBRGRARARBRARBR0821739358 VTS HF03M1 BRARARBRBR0821739359 VTS HF03M1 GNDN0821739360 VTS HF03M1 GRYGRXGR0821739361 VTS HF03M1 BRBRXX0821739362 VTS HF03M1 BRBRBRBRBRBRXX0821739363 VTS HF03M1 ARBRBRBRXX0821739364 VTS HF03M1 ARBRARBRBRXXX0821739365 VTS HF03M1 ARBRBRARBRBRBRBRXX0821739366 VTS HF03M1 ANANANANAN力士樂Rexroth節(jié)流閥：REXROTH單向力士樂節(jié)流閥、力士樂6通經(jīng) 10通經(jīng)單向節(jié)流閥、力士樂(BOSCH_REXROTH)DR系列單向節(jié)流閥、力士樂(BOSCH-REXROTH)SV系列單向節(jié)流閥、力士樂Rexroth雙單向節(jié)流閥、力士樂REXROTH疊加單向節(jié)流閥、力士樂Rexroth疊式節(jié)流閥、力士樂Rexroth液控節(jié)流閥Z2S系列、力士樂rexroth節(jié)流閥、力士樂單向節(jié)流閥，rexroth單向閥、力士樂單向節(jié)流閥、力士樂帶集成放大器比例節(jié)流閥rexroth、力士樂節(jié)流閥，rexroth節(jié)流閥、力士樂節(jié)流閥、博世力士樂rexroth 二通比例節(jié)流閥、博世力士樂rexroth單向節(jié)流閥、博世力士樂rexroth準(zhǔn)確節(jié)流閥F6型、博世力士樂rexroth節(jié)流閥 單向閥、博世力士樂疊加式節(jié)流閥 兩路節(jié)流單向閥、博世力士樂節(jié)流閥、疊加式雙單向節(jié)流閥、德國力士樂REXROTH(液壓閥)單向節(jié)流閥、比例節(jié)流閥、節(jié)流和單向節(jié)流閥、力士樂節(jié)流閥力士樂液壓閥：Bosch Rexroth比例閥 齒輪泵、Bosch-Rexroth比例液壓閥、力士樂rexroth電磁閥、力士樂放大板、力士樂電磁換向閥、力士樂電磁溢流閥、博世力士樂rexroth單向節(jié)流閥、博世力士樂rexroth壓力繼電器、博世力士樂rexroth齒輪泵、博世力士樂液壓備件、德國Bosch Rexroth比例伺服閥、德國博世力士樂rexroth液壓閥、德國博世力士樂rexroth電磁閥 柱塞泵 力士樂氣動閥  REXROTH氣動閥 力士樂氣動元件 REXROTH氣動元件 力士樂氣動產(chǎn)品Rexroth氣動產(chǎn)品 力士樂氣動 REXROTH力士樂 博世力士樂氣動 BOSCH力士樂氣動 BOSCH-REXROTH氣動力士樂伺服驅(qū)動器 力士樂伺服驅(qū)動 力士樂變頻器 博世力士樂伺服驅(qū)動 博世力士樂變頻器 博世變頻器 BOSCH-REXROTH伺服驅(qū)動 BOSCH-REXROTH伺服驅(qū)動控制器 REXROTH伺服驅(qū)動控制器 力士樂伺服電機  力士樂異步電機 力士樂三相同步電機 REXROTH伺服電機 REXROTH i/o模塊 力士樂IO模塊 BOSCH-REXROTH伺服電機 REXROTH伺服電機 REXROTH伺服控制 REXROTH PLC模塊 REXROTH工業(yè)PC 力士樂工業(yè)PC 力士樂工業(yè)CPU REXROTH工業(yè)CPU 力士樂數(shù)控系統(tǒng) REXROTH數(shù)控系統(tǒng) 力士樂數(shù)控驅(qū)動 REXROTH數(shù)控驅(qū)動 力士樂驅(qū)動系統(tǒng) REXROTH驅(qū)動系統(tǒng) 力士樂驅(qū)動控制器 REXROTH驅(qū)動控制器 博世REXROTH驅(qū)動系統(tǒng)