Kumanga ma valve amagetsi ndikuyika zambiri za valve yamagetsi ndi ubwino wa valve ya pneumatic ndi kuipa koyerekeza

Kumanga valavu yamagetsi ndi kuyika tsatanetsatane wa valve yamagetsi ndi ubwino wa valve ya pneumatic ndi kuipa koyerekeza The valavu yamagetsi yamagetsi ndi yaikulu kuposa valavu wamba, kuthamanga kwa valve yamagetsi kumatha kusinthidwa, kapangidwe kosavuta, kosavuta kusamalira, njira yochitira chifukwa. za buffer makhalidwe a gasi palokha, osati zosavuta kuonongeka ndi kupanikizana, koma ayenera kukhala ndi mpweya gwero, ndi dongosolo ulamuliro wake ndi zovuta kwambiri kuposa valavu magetsi. Vavu yamtunduwu nthawi zambiri iyenera kuyikidwa mopingasa mu payipi. Vavu yamagetsi nthawi zambiri imakhala ndi cholumikizira magetsi ndi valavu. Valavu yamagetsi imagwiritsa ntchito mphamvu yamagetsi ngati mphamvu kuyendetsa valavu kudzera pamagetsi amagetsi kuti izindikire kusintha kwa valve. Kuti akwaniritse cholinga chosinthira mapaipi apakati. Kotero, ndi mfundo ziti zomwe tiyenera kuziganizira poika valavu yamagetsi? Chipangizo cha valve yamagetsi ndi chida chofunikira kwambiri kuti muzindikire kuwongolera pulogalamu ya valve, kuwongolera zokha komanso kuwongolera kutali. Mayendedwe ake amatha kuyendetsedwa ndi sitiroko, torque kapena kukula kwa axial thrust. Chifukwa mawonekedwe ogwirira ntchito ndi kuchuluka kwa magwiritsidwe a chipangizo chamagetsi amagetsi amadalira mtundu wa valavu, momwe chipangizocho chimagwirira ntchito komanso malo a valve mu payipi kapena zida, chifukwa chake, kusankha kolondola kwa chipangizo chamagetsi ndikofunikira kupewa kuchulukirachulukira (makokedwe ogwira ntchito ndi apamwamba kuposa torque yowongolera). Kawirikawiri, kusankha kolondola kwa chipangizo cha valve yamagetsi kutengera zotsatirazi: Torque yogwiritsira ntchito The torque yogwiritsira ntchito ndiyo chizindikiro chachikulu chosankha chipangizo cha valve yamagetsi. Kutulutsa kwamagetsi kwa chipangizo chamagetsi kuyenera kukhala 1.2 ~ 1.5 nthawi za torque ya ma valve ogwiritsira ntchito katatu. Pali mitundu iwiri ikuluikulu ya chipangizo cha valve yamagetsi: imodzi sinakonzedwe ndi thrust disc, torque yachindunji; Chinanso ndi kasinthidwe ka thrust disc, torque yotulutsa kudzera mumtundu wa tsinde la disc kuti mutulutse. Chiwerengero cha mphete zogubuduza za shaft yotulutsa ya chipangizo chamagetsi chamagetsi chimagwirizana ndi kuchuluka kwa tsinde la valve ndi kuchuluka kwa ulusi. Iyenera kuwerengedwa molingana ndi M = H / ZS (M ndi chiwerengero cha mphete zogubuduza zomwe chipangizo chamagetsi chiyenera kukhutitsidwa, H ndi kutalika kwa valve, S ndi phula la ulusi wa valve stem drive ndi Z. ndi nambala ya ulusi wa valve). tsinde m'mimba mwake kwa Mipikisano kutembenukira lotseguka ndodo mavavu, ngati lalikulu tsinde awiri anagwirizana ndi chipangizo magetsi sangathe kudutsa tsinde valavu, sangathe anasonkhana mu valavu magetsi. Choncho, m'mimba mwake mkati mwa dzenje linanena bungwe shaft wa chipangizo magetsi ayenera kukhala wamkulu kuposa awiri akunja tsinde la valavu lotseguka ndodo. Kwa ma valve a mdima wamdima mu dipatimenti yozungulira ma valve ndi ma valve ambiri ozungulira, ngakhale kuti sikoyenera kulingalira kukula kwa tsinde la valve, kukula kwa tsinde la valve ndi kukula kwa njira yofunikira ziyenera kuganiziridwanso mokwanira mu kusankha, kuti msonkhano ugwire ntchito bwino. Ngati kutsegula ndi kutseka kwa valve yothamanga kwambiri, n'kosavuta kupanga chodabwitsa cha madzi. Choncho, liwiro loyenera lotsegula ndi kutseka liyenera kusankhidwa malinga ndi zochitika zosiyanasiyana zogwiritsira ntchito. Kuyerekeza ubwino ndi kuipa kwa valavu yamagetsi ndi valavu ya pneumatic Valve magetsi oyendetsa magetsi amagwiritsidwa ntchito makamaka m'mafakitale amagetsi kapena magetsi a nyukiliya, monga momwe madzi othamanga kwambiri amafunira njira yosalala, yosasokonezeka komanso yodekha. Ubwino waukulu wa actuator yamagetsi ndikuti kutalika sikusokoneza ndipo wogwiritsa ntchito amatha kugwiritsa ntchito nthawi zonse. Mphamvu yopangidwa ndi choyimitsa chachikulu imatha kufika 225000kgf. Ndi hydraulic actuator yokhayo yomwe ingathe kukwaniritsa chiwongolero chachikulu chotere, koma mtengo wa hydraulic actuator ndi wokwera kwambiri kuposa wamagetsi amagetsi. Kukhoza odana ndi kupatuka kwa actuator magetsi ndi zabwino kwambiri, ndi linanena bungwe kukankhira kapena makokedwe kwenikweni mosalekeza, amene akhoza bwino kugonjetsa mphamvu wosalinganizika wa sing'anga ndi kukwaniritsa kulamulira olondola magawo ndondomeko. Chifukwa chake, kulondola kowongolera ndikwapamwamba kuposa kwa pneumatic actuator. Ngati servo amplifier ikugwiritsidwa ntchito, zotsatira zabwino ndi zoipa zimatha kusinthanitsa mosavuta, ndipo malo a valavu yopuma chizindikiro akhoza kukhazikitsidwa mosavuta (sungani / kutseguka kwathunthu / kutsekedwa kwathunthu). Cholakwacho chikachitika, chiyenera kukhala pamalo oyamba, zomwe sizingatheke kwa woyendetsa pneumatic. Woyendetsa pneumatic ayenera kugwiritsa ntchito makina ophatikizana oteteza kuti azindikire kusungidwa kwa malo. Zoyipa zazikulu za actuator yamagetsi ndi izi: Mapangidwewo ndi ovuta kwambiri, amatha kulephera, ndipo chifukwa cha zovuta zake, zofunikira zaukadaulo za ogwira ntchito yokonza malo ndizokwera kwambiri; Opaleshoni yamagalimoto kuti ipangitse kutentha, ngati kusintha kumakhala pafupipafupi, kumayambitsa kutenthedwa kwagalimoto mosavuta, chitetezo chamafuta, komanso kumawonjezera kuvala kwa zida zochepetsera; Komanso, ntchito pang'onopang'ono. Zimatenga nthawi yayitali kuti mutulutse chizindikiro kuchokera kwa woyang'anira kupita kumalo ofananirako poyankha wowongolera. Ichi ndichifukwa chake sizowoneka bwino ngati ma pneumatic ndi hydraulic actuators. Vavu yoyendetsedwa ndi mpweya The actuator ndi njira yowongolera ya valve pneumatic actuator ndi yofanana, ndipo chowongoleracho chili ndi magulu awiri: mtundu wa filimu ndi mtundu wa pistoni. Sitiroko ya pisitoni ndi yayitali, yoyenera nthawi yofuna kukankhira kwakukulu; The filimu sitiroko ndi yaing'ono, akhoza mwachindunji kuyendetsa tsinde. Chifukwa chowongolera pneumatic chili ndi zabwino zamapangidwe osavuta, kutulutsa kwakukulu, kuchitapo kanthu kokhazikika komanso kodalirika, komanso chitetezo ndi kuphulika, kumakhala ndi ntchito yabwino pakupangira magetsi, makampani opanga mankhwala, kuyenga mafuta ndi zofunikira zina zachitetezo. Ubwino waukulu wa actuator ya pneumatic: Landirani chizindikiro cha gasi chopitilira, kusuntha kwa mzere (mutatha kuwonjezera chipangizo chosinthira magetsi / gasi, mutha kuvomerezanso chizindikiro chamagetsi chosalekeza), ena okhala ndi mkono wa rocker, amatha kutulutsa kusamutsidwa kwamakona. Lili ndi ntchito zabwino ndi zoipa. Kuthamanga kwachangu ndikwapamwamba koma kumachepetsa pamene katundu akuwonjezeka. Mphamvu yotulutsa ikugwirizana ndi kuthamanga kwa ntchito. Kudalirika kwakukulu, koma valavu silingathe kusungidwa pambuyo pa kusokonezeka kwa mpweya (ikhoza kusungidwa pambuyo powonjezera valavu yosungira). Zovuta kukwaniritsa kuwongolera magawo ndi kuwongolera pulogalamu. Kuyang'ana ndi kukonza kosavuta, kusinthika kwabwino kwa chilengedwe. Mphamvu yotulutsa ndi yayikulu. Ndi ntchito yoteteza kuphulika.