Ama-actuator kagesi kanye ne-pneumatickumavalvu epayipi: Kubonakala sengathi lezi zinhlobo ezimbili zama-actuator zihluke kakhulu, futhi ukukhetha kufanele kwenziwe ngokuya ngomthombo wamandla otholakala endaweni yokufaka.Kodwa empeleni lo mbono uchemile.Ngaphezu komehluko oyinhloko futhi osobala, baphinde babe nenani lezici ezingavamile ezingavamile.

Ama-actuator kagesi nawe-pneumatic yizindlela ezimbili zokushayela ezisetshenziswa kakhulu ezinhlelweni ezizenzakalelayo.Ngokuvamile, isinqumo sokukhetha se-actuator senziwa esigabeni sokuklama esiyisisekelo, futhi sizosetshenziswa kuze kube sekupheleni komjikelezo wempilo ngemva kokufakwa.

Lapho ukhetha uhlobo lwamandla e-actuator, abantu bavame ukungacabangi amapharamitha we-process medium epayipini, kodwa banake kuphela izinto zokubhekisela zangaphakathi zomklami, isimo sokuhlinzekwa kwamandla, noma ukuthi isayithi lingakwazi yini ukuhlinzeka ngempahla enkulu. inani legesi elakhiwe ngaphambili.

Kodwa-ke, ngesikhathi sokusebenza, kuvame ukutholakala ukuthi amanye ama-valve adinga ukuhlonyiswa ngama-actuator, noma imingcele yenqubo yenqubo kwamanye ama-valve izoshintsha.Khona-ke umbuzo uyaphakama: Ingabe kufanele ngigcine i-actuator yoqobo noma ngifake enye i-actuator ukuze ngithuthukise ukusebenza?

Impilo ende yesevisi

Lesi sihloko sizokwethula futhi siqhathanise izici zokusebenza eziyinhloko zama-actuator kagesi kanye ne-pneumatic.

Ngaphansi kwezimo ezijwayelekile, abakhiqizi bazoqinisekisa imijikelezo yokusebenza eyi-10,000 yama-actuator kagesi kanye nemijikelezo yokusebenza eyi-100,000 yama-actuator womoya.Ngokusobala, ngokwenani lemijikelezo yokusebenza, i-actuator ye-pneumatic inempilo ende ngenxa yesakhiwo sayo esilula.Ngaphezu kwalokho, indawo yokuxhumana ye-friction ye-actuator ye-pneumatic yenziwe nge-elastomer noma i-polymer, futhi ama-O-rings agugile kanye nezakhi zomhlahlandlela wepulasitiki kulula ukushintshwa.

Njenge-actuator kagesi, kuvame ukuba ne-gearbox yokunciphisa ukusuka ku-motor kuya ku-shaft okukhiphayo.Maningi amagiya ahlanganayo, azoguga ngesikhathi sokusebenza.Kuyaqapheleka futhi ukuthi asikho isidingo sokushintsha amafutha okugcoba phakathi nawo wonke umjikelezo wokuphila we-actuator yomoya.

Torque

Enye yezimiso ezibaluleke kakhulu zokusebenza kwama-valve actuators i-torque.I-torque ye-actuator kagesi incike ekwakhiweni (ingxenye eqhubekayo) kanye ne-voltage esetshenziswa ku-stator.I-torque ye-actuator ye-pneumatic incike ekwakhiweni (ingxenye eqhubekayo) kanye nokucindezela kokunikezwa komoya okunikezwa ku-actuator yomoya.

Ngokuvamile, i-torque ye-actuator idinga ukuba ibe nkulu kunetorque enkulu ye-valve, noma ibe nkulu kunetorque edingekayo ukuhambisa isici sokuvala.Ekusetshenzisweni kwangempela, itorque yangempela yevalvu ingaba nkulu kunetorque enkulu eshiwo wuphawu lokuthengisa lomkhiqizi, futhi ibe nkulu kunetorque enkulu ye-actuator.Lokhu akungabazeki ukuthi kuyisimo esiphuthumayo.

Uma uqhubeka nokusebenzisa i-actuator, ingase ibangele umonakalo ku-actuator ne-valve.Uma i-torque ye-valve ikhula, i-motor izokwandisa kancane kancane i-torque ize ifinyelele inani lokuphuma (inani lokudonsa).Lokhu kusho ukuthi isakhiwo somshini siyaphoqeleka ukuthi sikhiphe futhi simelane ne-torque eyeqile ngaphezu kwebanga lokuklama.

Ukuvikela phezu kwetorque

Ukuze uvimbele okokusebenza ukuthi konakaliswe ngaphansi kwezimo ezishiwo ngenhla, isiqalisi sikagesi singahlonyiswa ngezisetshenziswa ezithile ezikhethekile.Okuvame kakhulu ukushintshwa kwe-torque, okungaba ngomshini (isimiso esivamile sokusebenza ukuthi igiya lezikelemu lihamba nge-axially linearly esimweni se-over-torque);kungase futhi kube nge-electronic (isimiso esivamile ukukala i-stator current, noma umphumela weHholo.).Lapho i-torque idlula inani eliphakeme eliklanyelwe, inkinobho ye-torque inganqamula i-voltage ye-stator futhi imise i-actuator motor.Asikho isidingo sokuvikelwa kwetorque ngokweqile kuma-actuator womoya.Uma i-torque esetshenziswe ku-valve idlula umkhawulo oshiwo, izakhiwo ezibonakalayo zomoya ocindezelwe zizokwenza ukuthi i-actuator yomoya imise ukushayela.Ngokungafani nama-actuator kagesi, i-torque ephumayo yama-actuator womoya ngeke yeqe umkhawulo wokuklama.Kungacatshangwa ukuthi uma i-valve yepayipi ifakwe i-actuator ye-pneumatic, ingozi yokuhluleka kwemishini ngenxa ye-torque engaphezu kwenani elishiwo iyaqedwa.

Umklamo wokuvikela ukuqhuma

Uma kunezimpahla eziyingozi endaweni esetshenziswayo, okokusebenza kukagesi kungase kubangele ukuqhuma.Mayelana namazinga okuvikela nezindlela zokuvikela endaweni eyingozi, azifakiwe kulesi sihloko ngenxa yemikhawulo yendawo.

Noma kunjalo, kusadingeka ukugcizelela ukuthi izinto ezingaqhumi kufanele zisetshenziswe ezindaweni ezinezinto eziyingozi.

Uma kuqhathaniswa nama-actuator ajwayelekile embonini kagesi, ama-actuator kagesi angaqhumi amavalvu amapayipi abiza kakhulu futhi ayinkimbinkimbi ngokwengeziwe ekuklanyweni.Ngisho noma i-actuator yomoya isetshenziswa endaweni eyingozi, ayikho ingozi yokuqhuma.Kuma-actuator omoya, idizayini ekhethekile yendawo eyingozi nayo ikhawulelwe kuma-positioners, ama-solenoid valves kanye nokushintsha komkhawulo (Umfanekiso 1-3).Ngokuhambisanayo, uma i-actuator yomoya enento yokuvikela ukuqhuma isetshenziswa ukuze kusetshenziswe i-valve yepayipi, izindleko zizoba ngaphansi kakhulu kunalezo ze-activator kagesi engaqhumi enomsebenzi ofanayo.

Ukuma

Ama-actuator e-pneumatic anokunye kokushiyeka okubaluleke kakhulu.Lapho i-actuator ifinyelela phakathi kwe-stroke, ukuma kuyinkimbinkimbi, okusho ukuthi ukuma kwe-spool ye-valve yokulawula kunzima kakhulu.

Ngenxa yezimpawu ezibonakalayo zomoya, ukunemba kokuma kwama-actuator womoya kuphansi ngokuphindwe kaningana kunaleyo yama-activator kagesi.Uma i-actuator kagesi ithatha injini enyathelayo, ukunemba kokuma kwayo ngama-oda amaningana obukhulu obungaphezulu kwalowo we-actuator yomoya efakwe isihleli.Lokhu kwakamuva kungasetshenziswa kuphela kumasistimu angadingi ukunemba kokuma okuphezulu noma ukunemba kokulawula.Ama-actuator we-pneumatic asetshenziswa kuma-valve amapayipi anezici zawo ekwakhiweni kwesakhiwo: zonke izingxenye zesistimu yokulawula zifakwe endaweni yangaphandle ye-actuator, noma ngaphandle kwesakhiwo esikhulu.Uma udinga ukushintsha imodi yokusebenza ukuthi isuke ukuyivala ukuze uyilawule, udinga ukushintsha i-valve ye-solenoid ufake isihleli.Njengoba lezi zingxenye ezimbili zifakwe ngaphandle kwe-actuator ye-pneumatic, futhi ukuklama kwendawo yokukhwelana kuyafana, kulula kakhulu ukususa umsabalalisi bese ufaka i-positioner.Ngamanye amazwi, i-actuator efanayo ye-pneumatic ingasetshenziswa kukho kokubili ukuvala shaqa nokulawula ngokushintsha izesekeli ezihambisanayo (Umfanekiso 1-2).