I-actuator ye-pneumatic yi-actuator esebenzisa uxinzelelo lomoya ukuqhuba ukuvulwa, ukuvalwa okanye ukulawulwa kwevalvu. Ikwabizwa ngokuba yi-actuator ye-pneumatic okanye isixhobo se-pneumatic. Ii-actuator ze-pneumatic ngamanye amaxesha zixhotyiswe ngezixhobo ezithile ezincedisayo. Ezisetyenziswa rhoqo zii-valve positioners kunye neendlela ze-handwheel. Umsebenzi we-valve positioner kukusebenzisa umgaqo wempendulo ukuphucula ukusebenza kwe-actuator ukuze i-actuator ikwazi ukufikelela kwindawo echanekileyo ngokwesignali yokulawula yomlawuli. Umsebenzi we-handwheel mechanism kukuyisebenzisa ukusebenzisa ngqo i-control valve ukugcina imveliso eqhelekileyo xa inkqubo yolawulo ingaphumeleli ngenxa yokucima kombane, ukuphuma kwegesi, ukungabikho komlawuli okanye ukusilela kwe-actuator.
Umgaqo wokusebenza we-Pneumatic Actuator
Xa umoya ocinezelweyo ungena kwi-actuator ye-pneumatic ukusuka kwi-nozzle A, igesi ityhala ii-piston ezimbini ukuba zihambe ngokuthe ngqo ukuya kumacala omabini (iziphelo zentloko yesilinda), kwaye i-rack kwi-piston iqhuba igiya kwi-shaft ejikelezayo ukuze ijikeleze ngama-90 degrees ngokuchasene newotshi, kwaye i-valve iyavulwa. Ngeli xesha, igesi kuzo zombini iziphelo ze-actuator ye-pneumatic ikhutshwa kwi-nozzle B. Ngokwahlukileyo koko, xa umoya ocinezelweyo ungena kumacala omabini e-actuator ye-pneumatic ukusuka kwi-nozzle B, igesi ityhala i-piston ezimbini ukuba ihambe ngokuthe ngqo phakathi, kwaye i-rack kwi-piston iqhuba igiya kwi-shaft ejikelezayo ukuze ijikeleze ngama-90 degrees ngokulandelana kwewotshi, kwaye i-valve ivaliwe. Ngeli xesha, igesi ephakathi kwe-actuator ye-pneumatic ikhutshwa kwi-nozzle A. Oku kungasentla ngumgaqo wokudlulisa wohlobo oluqhelekileyo. Ngokweemfuno zomsebenzisi, i-actuator ye-pneumatic ingafakwa ngomgaqo wokudlulisa ochasene nohlobo oluqhelekileyo, oko kukuthi, i-axis ekhethiweyo ijikeleza ngokuthe ngqo ukuvula i-valve, kwaye ijikeleze ngokuthe ngqo ukuvala i-valve. I-nozzle A ye-actuator ye-pneumatic esebenza kanye (uhlobo lokubuyela kwentwasahlobo) yi-air inlet, kwaye i-nozzle B yi-exhaust hole (i-nozzle B kufuneka ifakwe nge-muffler). I-nozzle A inlet ivula i-valve, kwaye amandla e-spring avala i-valve xa umoya ucinyiwe.
Ukusebenza kwe-Pneumatic Actuator
1. Amandla okukhupha okanye i-torque elinganisiweyo yesixhobo somoya kufuneka ihambelane nemigaqo yamazwe ngamazwe neyabathengi
2. Phantsi kweemeko ezingenamthwalo, isilinda singena ngoxinzelelo lomoya oluchazwe kwi "Theyibhile 2", kwaye intshukumo yaso kufuneka igudileyo ngaphandle kokuxinana okanye ukurhubuluza.
3. Phantsi koxinzelelo lomoya lwe-0.6MPa, i-torque yokukhupha okanye i-thrust yesixhobo somoya kuzo zombini iindlela zokuvula nezokuvala akufuneki ibe ngaphantsi kwexabiso eliboniswe kwi-nameplate yesixhobo somoya, kwaye isenzo kufuneka sibe bhetyebhetye, kwaye akukho tshintsho oluhlala luhleli okanye ezinye izinto ezingaqhelekanga eziya kwenzeka nakweyiphi na indawo.
4. Xa uvavanyo lokutywina lwenziwa ngoxinzelelo oluphezulu olusebenzayo, ubungakanani bomoya ovuzayo kwicala ngalinye loxinzelelo olungasemva abuyi kudlula (3+0.15D)cm3/min (imeko eqhelekileyo); ubungakanani bomoya ovuzayo kwisiciko sokugqibela kunye nomngxuma wokukhupha awuyi kudlula (3+0.15d)cm3/min.
5. Uvavanyo lwamandla lwenziwa ngoxinzelelo olusebenzayo oluphindwe kayi-1.5. Emva kokugcina uxinzelelo lovavanyo imizuzu emi-3, isigqubuthelo sesiphelo sesilinda kunye neendawo zokutywina ezingashukumiyo azivumelekanga ukuba zivuza kwaye ziguquguquke kwisakhiwo.
6. Inani lobomi besenzo, isixhobo somoya silingisa isenzo sevalvu yomoya. Phantsi kwemeko yokugcina i-torque yokukhupha okanye umthamo wokutyhala kuzo zombini iindlela, inani lemisebenzi yokuvula nokuvala aliyi kuba ngaphantsi kwamaxesha angama-50,000 (umjikelo omnye wokuvula nokuvala).
7. Kwizixhobo zomoya ezineendlela ze-buffer, xa i-piston isiya kwindawo yokugqibela ye-stroke, impembelelo ayivumelekanga.
Iingenelo ze-Pneumatic Actuators
1. Yamkela imiqondiso yegesi eqhubekayo kunye nokususwa okuhambayo okuthe ngqo (emva kokongeza isixhobo sokuguqula umbane/igesi, ingamkela nemiqondiso yombane eqhubekayo). Ezinye zinokukhupha ukususwa kwe-angular emva kokuba zixhotyiswe ngengalo ye-rocker.
2. Kukho imisebenzi yesenzo elungileyo nengalunganga.
3. Isantya sokuhamba siphezulu, kodwa isantya siya kuncipha xa umthwalo usanda.
4. Amandla okukhupha anxulumene noxinzelelo olusebenzayo.
5. Ukuthembeka okuphezulu, kodwa ivalvu ayinakugcinwa emva kokuba umthombo womoya uphazamisekile (inokugcinwa emva kokongeza ivalvu yokugcina indawo).
6. Akulula ukwenza ulawulo oluhlukeneyo kunye nolawulo lwenkqubo.
7. Ukugcinwa okulula kunye nokuzivumelanisa nezimo kakuhle nokusingqongileyo.
8. Amandla amakhulu okukhupha.
9. Inomsebenzi wokumelana nokuqhuma.
Ehlotyeni
Ubukhulu bokufakelwa kunye noqhagamshelo lwee-actuators zomoya kunye neevalvu ziyilwe ngokwemigangatho yamazwe ngamazwe ye-ISO5211, i-DIN3337 kunye ne-VDI/VDE3845, kwaye zinokutshintshiswana nee-actuators eziqhelekileyo zomoya.
Umngxuma womthombo womoya uhambelana nomgangatho we-NAMUR.
Umngxuma wokuhlanganisa umngxuma osezantsi we-actuator ye-pneumatic (ehambelana nomgangatho we-ISO5211) sisikwere esiphindwe kabini, esilungele ukufakwa kweevalvu ezineentonga zesikwere ezithe nkqo okanye ezingama-45°.
Ixesha leposi: Feb-16-2025