煙臺執(zhí)行機構批發(fā)廠家客戶至上江蘇蘭閥通用設備供應-b2b網(wǎng)站_b2b電子商務平臺【買產品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="根據(jù)生產工藝控制要求確定電動執(zhí)行器的控制模式：電動執(zhí)行器的控制模式一般分為開關型（開環(huán)控制）和調節(jié)型（閉環(huán)控制）兩大類。1.開關型（開環(huán)控制）開關型電動執(zhí)行器一般實現(xiàn)對閥門的開或關控制，閥門要么處于全開位置，要么處于全關位置，此類閥門不需對"><meta name="keywords" content="煙臺執(zhí)行機構批發(fā)廠家,機構"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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</span>0519_</p><p><span>網(wǎng)址: </span>http://www.lanfa.cn</p><p><span>手機: </span>0519-88610258</p><p><span>地址: </span>橫山橋鎮(zhèn)省莊村</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="df7fzvj" class="page-proshow02"><p class="title">詳細說明</p><div id="lt7d7xt" class="box"><p><p style="text-indent:25px">根據(jù)生產工藝控制要求確定電動執(zhí)行器的控制模式：電動執(zhí)行器的控制模式一般分為開關型（開環(huán)控制）和調節(jié)型（閉環(huán)控制）兩大類。1.開關型（開環(huán)控制）開關型電動執(zhí)行器一般實現(xiàn)對閥門的開或關控制，閥門要么處于全開位置，要么處于全關位置，此類閥門不需對介質流量進行精確控制。特別值得一提的是開關型電動執(zhí)行器因結構形式的不同還可分為分體結構和一體化結構。選型時必需對此做出說明，不然經常會發(fā)生在現(xiàn)場安裝時與控制系統(tǒng)***等不匹配現(xiàn)像。a）分體結構（通常稱為普通型）：控制單元與電動執(zhí)行器分離，煙臺執(zhí)行機構批發(fā)廠家，煙臺執(zhí)行機構批發(fā)廠家，煙臺執(zhí)行機構批發(fā)廠家，電動執(zhí)行器不能單獨實現(xiàn)對閥門的控制，必需外加控制單元才能實現(xiàn)控制，一般外部采用控制器或控制柜形式進行配套。執(zhí)行機構通過變更齒輪的減速比可以得到較高的輸出。煙臺執(zhí)行機構批發(fā)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺執(zhí)行機構批發(fā)廠家,機構" src="https://tyunfile.71360.com/WaterMark/UploadFile/lanfatonyon/637418191745924950/5880969.png"></div><p style="text-indent:25px">驅動能源：好常用的驅動能源是電源或流體源，如果選擇電源為驅動能源，對于大尺寸閥門一般選用三相電源，對于小尺寸閥門可選用單相電源。一般電動執(zhí)行機構可有多種電源類型供選擇。有時也可選直流供電，此時可通過安裝電池實現(xiàn)電源故障安全操作。流體源種類很多，首先可以是不同的介質如：壓縮空氣、氮氣、天然氣、液壓流體等，其次它們可以具備各種壓力，第三執(zhí)行機構具有各種尺寸以提供輸出力活力閥門類型選擇閥門用執(zhí)行機構時，必須要知道閥門的種類，這樣才可以選擇正確的執(zhí)行機構類型。有些閥門需要多回轉驅動，有些需要單回轉驅動，有些需要往復式驅動，它們影響了執(zhí)行機構類型的選擇。通常多回轉的氣動執(zhí)行機構比電動多回轉執(zhí)行機構價格要貴，但是往復式直行程輸出的氣動執(zhí)行機構價格比電動多回轉執(zhí)行機構便宜。山西IFB系列智能型電動執(zhí)行器機構多少錢執(zhí)行機構通過微型馬達、壓電晶體等作用可使機構產生微米級工作行程，實現(xiàn)機構微型化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺執(zhí)行機構批發(fā)廠家,機構" src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637418201853805809/8254593.png"></div><p style="text-indent:25px">執(zhí)行機構的動作方向不受伺放板的控制：故障判斷和檢修過程:首先讓用戶用萬用表檢測兩個限流電阻和移相電容及電機的繞組阻值，發(fā)現(xiàn)其中一個限流電阻開路。影響執(zhí)行機構轉向的三個因素就是①電機本身的繞組;②限流電阻;③移相電容，以后發(fā)生這種情況都有要從這三方面考慮。故障現(xiàn)象:無論現(xiàn)場給什么信號電機都不動作。故障判斷和檢修過程:直接在電機繞組間通電，電機也不轉，抱閘拆下通電電機還是不轉，檢測電機繞組阻值均正常，手輪搖執(zhí)行機構動作正常。檢測的結果都正常就是通電時電機不轉，此時懷疑電機的轉子，把電機拆開，發(fā)現(xiàn)轉子用手都擰不動，原來轉子和電機端蓋之間已有一層堅固的灰，把這層灰除去之后，加上一點潤滑油，用手就可以擰動了。重新把電機裝好并與執(zhí)行機構配合裝上，通電正常，重新調試。</p><p style="text-indent:25px">電動執(zhí)行器的要求：（1）對于輸出為轉交的執(zhí)行機構要有足夠的轉矩，對于輸出為直線位移的執(zhí)行機構要有足夠的力，以便克服負載的阻力。特別是高溫高壓閥門，其密封填料壓的比較緊，長時間關閉之后在開啟時往往比正常情況要費更大的力，至于動作速度并不一定很高，因為流量調節(jié)和控制不需要太快。為了加大輸出轉矩或力，電動機的輸出軸都有減速器，如果電機本身就是低速的，減速器可以簡單些。（2）減速器或電機的傳動系統(tǒng)中應該有自鎖特性，當電機不轉時，負載的不平衡力（例如閘板閥的自重）不可引起轉角或位移的變化。因此往往要用渦輪蝸桿機構或電磁制動器。有了這樣的措施，在意外停電時，閥位就能保持在停電前的位置上。執(zhí)行機構增強工作安全性能和環(huán)境保護性能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺執(zhí)行機構批發(fā)廠家,機構" src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637418201816764799/54942.png"></div><p style="text-indent:25px">分類：以電能、壓縮空氣或壓力油為動力，輸出與控制信號相對應的轉角或直線位移，以一定轉矩或推力推動調節(jié)機構，從而完成生產過程參數(shù)控制要求的裝置，也稱執(zhí)行器。根據(jù)采用動力源的不同，通常有電動執(zhí)行機構，氣動執(zhí)行機構，液動執(zhí)行機構等。執(zhí)行機構是自動控制系統(tǒng)的重要環(huán)節(jié)。它接受來自控制儀表或人工給定的控制信號，對其進行功率放大，然后轉換為輸出軸的相應的角位移或直線位移，用以推動各種調節(jié)機構，如調節(jié)閥、風門擋板等，改變被調介質流量，以完成各種過程參數(shù)的自動控制或人工手動控制。執(zhí)行機構的動作規(guī)律通常是線性的，也有采用等百分比型的。其控制信號有連續(xù)的電流信號，也有斷續(xù)的電壓信號或脈沖信號。目前好常用的執(zhí)行機構是電信號氣動長行程執(zhí)行機構和電動執(zhí)行器。執(zhí)行機構具有動作平穩(wěn)，推力大，精度高，本質防爆，易于實現(xiàn)所要求的控制規(guī)律等特點。煙臺執(zhí)行機構批發(fā)廠家</p><p style="text-indent:25px">執(zhí)行機構不選用隔膜閥。防腐性能強，使用壽命長。執(zhí)行機構驅動靈活。反饋、聯(lián)鎖信號準確。煙臺執(zhí)行機構批發(fā)廠家</p><p style="text-indent:25px">在日常維護中我們發(fā)現(xiàn)，電動執(zhí)行機構的故障多發(fā)于伺服放大器故障。而伺服放大器是由電器元件組成的電子線路板構成，電子元件的質量和電路板的可靠性決定了伺服放大器的可靠性。常規(guī)伺服放大器抗干擾的能力普遍不高，電壓的波動、高溫、高粉塵、振動等外部環(huán)境的影響都容易導致伺服放大器故障。針對伺服放大器存在可靠性差的缺點，建議利用DCS來實現(xiàn)伺服放大器的控制功能。因為DCS具有靈活的組態(tài)方法、豐富的軟件功能和很高的可靠性，可自動判斷執(zhí)行機構的狀態(tài)，當固態(tài)繼電器擊穿或者閥位反饋信號有誤時能夠使電動執(zhí)行機構保持在原位置，以防止事故的擴大化。而且在可靠性方面有了很大程度的提高。煙臺執(zhí)行機構批發(fā)廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3108511.html</p></div></div></div></div></div><div id="bxl757l" class="page-right twoColRt"><div id="tt7z7xh" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="tv7rrvp" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="lvhlzlf" 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