瑞士BELIMO執(zhí)行(xing)器LM24A-SR-T-2.0型(xing)的(de)工(gong)作(zuo)原理(li)：
瑞士BELIMO執(zhí)行(xing)器在齒輪(lun)級(jí)(ji)，發(fā)動(dòng)(dong)機(jī)的(de)轉(zhuǎn)(zhuan)速(su)可(ke)通(tong)過兩(liang)套(tao)齒輪(lun)傳(chuan)送到輸(shu)出桿上(shang)。主(zhu)減(jian)速器由(you)行(xing)星齒輪(lun)完(wan)成(cheng)，副減(jian)速器由(you)蝸輪(lun)實(shí)(shi)現(xiàn)，它被(bei)壹套(tao)繃緊(jin)的(de)彈(dan)簧固定(ding)在中(zhong)心(xin)位(wei)置(zhi)。在發(fā)生過載的情(qing)況下(xia)，也(ye)就(jiu)是(shi)輸(shu)出桿超過了彈(dan)簧的(de)設(shè)定(ding)轉(zhuǎn)(zhuan)矩(ju)時(shí)(shi)，中(zhong)央(yang)蝸輪(lun)會(huì)發(fā)(fa)生軸(zhou)向(xiang)位移，對(duì)(dui)開關(guān)及(ji)信(xin)號(hào)裝(zhuang)置進(jìn)行(xing)微調(diào)(tiao)，為(wei)系統(tǒng)(tong)提(ti)供(gong)保護(hù)(hu)。 受(shou)由外(wai)部(bu)變化控(kong)制桿操(cao)縱的(de)耦合(he)的作(zuo)用，輸(shu)出桿在發(fā)動(dòng)(dong)機(jī)工(gong)作(zuo)時(shí)(shi)與(yu)蝸輪(lun)耦(ou)合(he)，在手(shou)動(dòng)(dong)操(cao)作(zuo)時(shí)(shi)與(yu)手(shou)輪(lun)耦(ou)合(he)。當(dāng)發(fā)(fa)動(dòng)(dong)機(jī)不(bu)工(gong)作(zuo)時(shí)(shi)，可(ke)以(yi)很容易(yi)地?cái)嗟?diao)電機(jī)驅(qū)(qu)動(dòng)(dong)，並(bing)且只(zhi)需(xu)壓壹下(xia)控(kong)制桿即(ji)可連(lian)上(shang)手(shou)輪(lun)。由(you)於電機(jī)驅(qū)(qu)動(dòng)(dong)優(yōu)(you)先於(yu)手(shou)動(dòng)(dong)操(cao)作(zuo)，因此當(dāng)發(fā)動(dòng)(dong)機(jī)再(zai)次(ci)啟(qi)動(dòng)(dong)時(shí)(shi)，會(huì)自(zi)動(dòng)(dong)發(fā)(fa)生反(fan)向(xiang)動(dòng)(dong)作(zuo)。這樣就(jiu)可(ke)以避(bi)免(mian)當(dāng)發(fā)(fa)動(dòng)(dong)機(jī)運(yùn)(yun)轉(zhuǎn)(zhuan)時(shí)(shi)還(hai)開啟(qi)手(shou)輪(lun)，有(you)利於保護(hù)(hu)系(xi)統(tǒng)(tong)。
由(you)於手(shou)輪(lun)直(zhi)接與輸(shu)出桿耦(ou)合(he)，因此可以保證(zheng)在內(nèi)部(bu)齒輪(lun)失靈(ling)或損壞時(shí)(shi)閥(fa)門(men)的(de)正常(chang)手(shou)動(dòng)(dong)操(cao)作(zuo)。
安裝(zhuang)在齒輪(lun)上(shang)的開關(guān)與(yu)信(xin)號(hào)裝(zhuang)置是(shi)壹(yi)個(gè)密封外(wai)殼(ke)，保護(hù)(hu)其(qi)內(nèi)部(bu)的元件實(shí)現(xiàn)以下(xia)功能：
l 本地(di)或遠(yuǎn)程(cheng)顯示閥(fa)門(men)位(wei)置(zhi)
l 執(zhí)行(xing)器/閥(fa)門(men)的(de)過載保護(hù)(hu)
l 限(xian)定(ding)閥門(men)行(xing)程(cheng)範(fàn)(fan)圍(wei)
l 電氣接口
瑞(rui)士BELIMO執(zhí)行(xing)器在不同型(xing)號(hào)閥(fa)門(men)上(shang)的(de)安裝(zhuang)是(shi)通(tong)過輸(shu)出桿來(lai)完(wan)成(cheng)的，它可適(shi)用於(yu)現(xiàn)有的(de)多(duo)種(zhong)閥(fa)桿組(zu)態(tài)。
在過程(cheng)控(kong)制系(xi)統(tǒng)(tong)中(zhong)，瑞(rui)士BELIMO執(zhí)行(xing)器由(you)執(zhí)(zhi)行(xing)機(jī)構(gòu)(gou)和自(zi)動(dòng)(dong)化(hua)調(diào)(tiao)節(jié)(jie)機(jī)構(gòu)(gou)兩(liang)部(bu)分組(zu)成(cheng)。自(zi)動(dòng)(dong)化(hua)調(diào)(tiao)節(jié)(jie)機(jī)構(gòu)(gou)通過執(zhí)行(xing)元件直接改變(bian)生產(chǎn)過程(cheng)的(de)參數(shù)，使生產(chǎn)過程(cheng)滿(man)足預(yù)(yu)定(ding)的要(yao)求(qiu)。執(zhí)行(xing)機(jī)構(gòu)(gou)則(ze)接受來(lai)自(zi)控(kong)制器的(de)控(kong)制信(xin)號(hào)(hao)把它轉(zhuǎn)(zhuan)換(huan)為(wei)驅(qū)(qu)動(dòng)(dong)調(diào)(tiao)節(jié)(jie)機(jī)構(gòu)(gou)的輸(shu)出（如角(jiao)位移(yi)或直(zhi)線位(wei)移輸(shu)出）。它也(ye)采用(yong)適當(dāng)(dang)的執(zhí)行(xing)元件，但(dan)要(yao)求(qiu)與調(diào)(tiao)節(jié)(jie)機(jī)構(gòu)(gou)不同(tong)。執(zhí)(zhi)行(xing)器直(zhi)接安裝(zhuang)在生產(chǎn)現(xiàn)場(chǎng)，有(you)時(shí)(shi)工(gong)作(zuo)條件嚴(yán)苛(ke)。能否保持(chi)正常(chang)工(gong)作(zuo)直接影響(xiang)自(zi)動(dòng)(dong)調(diào)(tiao)節(jié)(jie)系(xi)統(tǒng)(tong)的(de)安全性和可(ke)靠性。
瑞士BELIMO執(zhí)行(xing)器是(shi)自(zi)動(dòng)(dong)控(kong)制系(xi)統(tǒng)(tong)中(zhong)的(de)執(zhí)行(xing)機(jī)構(gòu)(gou)和控(kong)制閥(fa)組(zu)合(he)體。它在自(zi)動(dòng)(dong)化(hua)控(kong)制系(xi)統(tǒng)(tong)中(zhong)的(de)作(zuo)用是(shi)接受來(lai)自(zi)調(diào)(tiao)節(jié)(jie)器或計(jì)(ji)算(suan)機(jī)（DCS、PLC等(deng)）發(fā)出的(de)信號(hào)(hao)，以(yi)其(qi)在工(gong)藝(yi)管(guan)路的位(wei)置和(he)特(te)性，調(diào)(tiao)節(jié)(jie)工(gong)藝(yi)介質(zhì)的流量，從而將被(bei)控(kong)自(zi)動(dòng)(dong)化(hua)儀表在生產(chǎn)過程(cheng)所(suo)要(yao)求(qiu)的範(fàn)圍(wei)內(nèi)。
瑞(rui)士BELIMO執(zhí)行(xing)器是(shi)自(zi)動(dòng)(dong)控(kong)制系(xi)統(tǒng)(tong)中(zhong)的(de)壹個(gè)重(zhong)要(yao)組(zu)成(cheng)部(bu)分。它的作(zuo)用是(shi)接受控(kong)制器送(song)來(lai)的控(kong)制信(xin)號(hào)(hao)，改變(bian)被(bei)控(kong)介質(zhì)的大小(xiao)，從而將被(bei)控(kong)變量維(wei)持(chi)在所要(yao)求(qiu)的數(shù)值上(shang)或壹(yi)定(ding)的範(fàn)(fan)圍(wei)內(nèi)。執(zhí)(zhi)行(xing)器按(an)其能源形(xing)式可分為(wei)氣動(dòng)(dong)、液(ye)動(dòng)(dong)、電動(dòng)(dong)三大類。氣動(dòng)(dong)執(zhí)(zhi)行(xing)器用(yong)壓縮(suo)空(kong)氣作(zuo)為(wei)能源，其特(te)點(diǎn)是(shi)結(jié)(jie)構(gòu)簡(jiǎn)(jian)單、動(dòng)(dong)作(zuo)可靠、平穩(wěn)、輸(shu)出推(tui)力(li)較(jiao)大、維(wei)修(xiu)方便、防火(huo)防爆，而且價(jià)(jia)格(ge)較(jiao)低(di)，因此廣泛(fan)地應(yīng)用於化工(gong)、造(zao)紙、煉油等(deng)生產(chǎn)(chan)過程(cheng)中(zhong)，它可以(yi)方便地(di)與被(bei)動(dòng)(dong)儀表配套(tao)使用。即(ji)使是(shi)使用電動(dòng)(dong)儀表或計(jì)(ji)算(suan)機(jī)控(kong)制時(shí)(shi)，只(zhi)要(yao)經(jīng)過電-氣轉(zhuǎn)(zhuan)換(huan)器或電-氣閥門(men)定(ding)位器將電信號(hào)轉(zhuǎn)(zhuan)換(huan)為(wei)20-100kPa的標(biāo)(biao)準(zhǔn)氣(qi)壓信號(hào)(hao)，仍(reng)然可用氣動(dòng)(dong)執(zhí)(zhi)行(xing)器。電動(dòng)(dong)執(zhí)(zhi)行(xing)器的(de)能源取(qu)用(yong)方便，信(xin)號(hào)傳(chuan)遞(di)迅速(su)，但(dan)結(jié)(jie)構(gòu)復(fù)(fu)雜(za)、防爆性能差。液(ye)動(dòng)(dong)執(zhí)(zhi)行(xing)器在化工(gong)、煉油等(deng)生產(chǎn)(chan)過程(cheng)中(zhong)基(ji)本上(shang)不(bu)使用，它的特(te)點(diǎn)是(shi)輸(shu)出推(tui)力(li)很大。
產(chǎn)(chan)品實(shí)物(wu)如下(xia)圖所(suo)示：
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