I-actuator yombane kunye ne-pneumatickwiivalvu zemibhobho: Kubonakala ngathi ezi ntlobo zimbini ze-actuator zahluke kakhulu, kwaye ukhetho kufuneka lwenziwe ngokomthombo wamandla okhoyo kwindawo yofakelo.Kodwa eneneni le mbono inomkhethe.Ukongeza kwiiyantlukwano eziphambili nezicacileyo, nazo zinenani leempawu ezingaqhelekanga ezingaqhelekanga.

Ii-actuator zombane kunye ne-pneumatic zezona ndlela zixhaphakileyo zokuqhuba kwiinkqubo ezizisebenzelayo.Ngokuqhelekileyo, isigqibo sokukhetha i-actuator senziwe kwinqanaba loyilo olusisiseko, kwaye luya kusetyenziswa kude kube sekupheleni komjikelezo wobomi emva kokufakwa.

Xa ukhetha uhlobo lwamandla e-actuator, abantu bahlala bengacingi iparameters yenkqubo ephakathi kumbhobho, kodwa bathathele ingqalelo kuphela izinto ezibhekiselele kumyili wangaphakathi, imeko yonikezelo lwamandla, okanye ukuba isiza sinokubonelela ngendawo enkulu. isixa serhasi esenziwe kwangaphambili.

Nangona kunjalo, ngexesha lokusebenza, ngokuqhelekileyo kufunyaniswa ukuba ezinye iivalve kufuneka zixhotyiswe nge-actuator, okanye iiparitha zenkqubo yenkqubo kwezinye iivalve ziya kutshintsha.Umbuzo ke uvela: Ngaba kufuneka ndigcine i-activator yokuqala okanye ndiyitshintshe ngenye i-activator ukuphucula ukusebenza?

Ubomi obude benkonzo

Eli nqaku liza kwazisa kwaye lithelekise iimpawu eziphambili zokusebenza zombane kunye ne-pneumatic actuators.

Phantsi kweemeko eziqhelekileyo, abavelisi baya kuqinisekisa imijikelo ye-10,000 yokusebenza kwee-activators zombane kunye ne-100,000 yemijikelo yokusebenza ye-pneumatic actuators.Ngokucacileyo, ngokwenani lemijikelezo yokusebenza, i-actuator ye-pneumatic inobomi obude ngenxa yesakhiwo sayo esilula.Ukongezelela, i-friction contact surface ye-actuator ye-pneumatic yenziwe nge-elastomer okanye i-polymer, kunye ne-O-rings ezigugileyo kunye nezinto zesikhokelo zeplastiki kulula ukutshintshela.

Njenge-actuator yombane, kuhlala kukho i-gearbox yokunciphisa ukusuka kwi-motor ukuya kwi-shaft ephumayo.Kukho iigiya ezininzi ezinxibelelana kunye, eziya kuphelelwa ngexesha lokusebenza.Kwakhona kubalulekile ukuba uqaphele ukuba akukho mfuneko yokutshintsha igrisi yokuthambisa ngexesha lomjikelezo wobomi be-actuator ye-pneumatic.

Torque

Enye yezona zinto zibalulekileyo zeparameters zentsebenzo yee-actuator zevalve yepayipi yitorque.I-torque ye-actuator yombane ixhomekeke kuyilo (icandelo eliqhubekayo) kunye ne-voltage esetyenziswe kwi-stator.I-torque ye-actuator ye-pneumatic ixhomekeke kuyilo (icandelo eliqhubekayo) kunye noxinzelelo lonikezelo lomoya olunikezelwa kwi-activator pneumatic.

Ngokuqhelekileyo, i-torque ye-actuator kufuneka ibe mkhulu kune-torque ephezulu yevalve, okanye ibe nkulu kunetorque efunekayo ukuhambisa into yokuvala.Ekusetyenzisweni okwenyani, i-torque yokwenyani yevalve inokuba nkulu kunowona mthamo uphezulu uchazwe luphawu lokuthengisa lomenzi, kwaye ibe mkhulu kunowona mthamo mkhulu we-actuator.Le yimeko kaxakeka ngokungathandabuzekiyo.

Ukuba uyaqhubeka ukusebenzisa i-actuator, inokubangela umonakalo kwi-actuator kunye nevalve.Ukuba i-torque ye-valve iyanda, i-motor iya kwandisa ngokuthe ngcembe i-torque ide ifikelele kwixabiso lokukhupha (ixabiso lokukhupha).Oku kuthetha ukuba isakhiwo somatshini sinyanzeliswa ukuba siphume kwaye simelane ne-torque egqithisileyo ngaphaya koluhlu loyilo.

Ngaphezulu kokhuseleko lwetorque

Ukuthintela ukuba izixhobo zonakaliswe phantsi kweemeko ezikhankanywe ngasentla, i-actuator yombane inokuxhotyiswa ngezixhobo ezithile ezikhethekileyo.Eyona nto ixhaphakileyo yi-torque switch, enokuthi ibe ngumatshini (umgaqo oqhelekileyo wokusebenza kukuba i-worm gear ihamba nge-axially linearly kwimeko ye-over-torque);inokuba yi-elektroniki (umgaqo oqhelekileyo kukulinganisa i-stator yangoku, okanye umphumo weHolo.).Xa i-torque idlula ixabiso eliphezulu eliyiliweyo, i-torque switch inokunqumla i-voltage ye-stator kwaye imise i-actuator motor.Akukho mfuneko yokukhusela i-torque engaphezulu kwi-actuator ye-pneumatic.Ukuba i-torque esetyenzisiweyo kwi-valve idlula umda ochaziweyo, iimpawu ezibonakalayo zomoya ocinezelweyo ziya kubangela ukuba i-actuator ye-pneumatic iyeke ukuqhuba.Ngokungafaniyo ne-actuator yombane, i-torque ephumayo yee-actuator ze-pneumatic ayiyi kudlula umda woyilo.Inokuthi ithathelwe ingqalelo ukuba i-valve yombhobho ixhotyiswe nge-actuator ye-pneumatic, umngcipheko wokungaphumeleli kwezixhobo ngenxa ye-torque edlula ixabiso elichaziweyo liyapheliswa.

Uyilo-ubungqina bokudubula

Ukuba kukho izinto ezinobungozi kwindawo yokusetyenziswa, izixhobo zombane zinokubangela ugqabhuko-dubulo.Ngokumalunga namanqanaba okukhusela kunye neendlela zokukhusela kwindawo enobungozi, azibandakanyi kweli nqaku ngenxa yokulinganiselwa kwendawo.

Nangona kunjalo, kusafuneka kugxininiswe into yokuba izixhobo ezithintela uqhushumbo kufuneka zisetyenziswe kwindawo enezixhobo eziyingozi.

Xa kuthelekiswa nezivusi zombane ezisemgangathweni eziqhelekileyo kwimizi-mveliso, izivusi zombane ezingagqabhukiyo kwiivalvu zemibhobho zibiza kakhulu kwaye zintsonkothe ​​ngakumbi kuyilo.Nokuba i-actuator ye-pneumatic isetyenziswe kwindawo enobungozi, akukho mngcipheko wokuqhuma.Kwii-actuator ze-pneumatic, uyilo olukhethekileyo lwendalo enobungozi lukhawulelwe kwi-positioners, i-valve ye-solenoid kunye nokutshintsha umda (Umfanekiso 1-3).Ngokuhambelanayo, ukuba i-actuator yomoya enesixhobo sokukhusela ugqabhuko-dubulo sisetyenziselwa ukusebenzisa ivalve yombhobho, iindleko ziya kuba sezantsi kakhulu kunezo ze-actuator-proof actuator yombane enomsebenzi ofanayo.

Ukuma

Ii-activators zomoya zinenye yezona ntsilelo zibalulekileyo.Xa i-actuator ifikelela phakathi kwe-stroke, ukubeka indawo kunzima ngakumbi, oku kuthetha ukuba ukubekwa kwe-spool ye-valve yokulawula kunzima kakhulu.

Ngenxa yeempawu ezibonakalayo zomoya, ukuchaneka kokubeka i-actuator ye-pneumatic amaxesha amaninzi ngaphantsi kune-actuator yombane.Ukuba i-activator yombane ithatha i-motor enyukayo, ukuchaneka kokuma kwayo kunemiyalelo emininzi yobukhulu obuphezulu kuneyo ye-activator ye-pneumatic ene-positioner.Le yokugqibela ingasetyenziselwa kuphela iinkqubo ezingadingi ukuchaneka kokubeka okuphezulu okanye ukuchaneka kokulawula.I-actuator ye-pneumatic esetyenziswe kwii-valve zepayipi zineempawu zayo kwisakhiwo sesakhiwo: zonke iinqununu zenkqubo yokulawula zifakwe kwindawo yangaphandle ye-actuator, okanye ngaphandle kwesakhiwo esiphambili.Ukuba ufuna ukutshintsha imo yokusebenza ukusuka ekucimeni ukuya kulawulo, kufuneka ubuyisele ivalve ye-solenoid ngesihleli.Ekubeni ezi zixhobo zimbini zifakwe ngaphandle kwe-actuator ye-pneumatic, kunye noyilo lwendawo yokukhwelana iyafana, kulungeleka ngakumbi ukususa umsasazi kunye nokufaka i-positioner.Ngamanye amazwi, i-actuator efanayo ye-pneumatic ingasetyenziselwa kokubili ukuvala kunye nokulawula ngokutshintshela izixhobo ezihambelanayo (Umfanekiso 1-2).