Uphando kunye nokusetyenziswa kokupakishwa kwevalve yobushushu obuphezulu

Uphando kunye nokusetyenziswa kokupakishwa kwevalve yobushushu obuphezulu Ubushushu bokusebenza kwesivalo yi-425 ~ 550℃ kubushushu obuphezulu ⅰ ibakala (ekubhekiswa kulo njengebakala le-PI). Izinto eziphambili zevalve yeklasi ye-PI "inqanaba lobushushu eliphezulu Ⅰ medium carbon chromium nickel ezinqabileyo zomhlaba titanium umgangatho intsimbi ukumelana nobushushu" kwi ASTMA351 umgangatho CF8 njengesiseko. Ekubeni ibakala le-PI ligama elithile, ingcamango yokushisa okuphezulu kwensimbi engenasici (P) ifakiwe apha. Ngoko ke, ukuba indawo yokusebenza ngamanzi okanye umphunga, nangona ikhona intsimbi yobushushu obuphezulu WC6 (t≤540 ℃) okanye WC9 (t≤570℃), kwioli yesulfure, nangona ikhona intsimbi yobushushu obuphezulu C5(ZG1Cr5Mo), kodwa apha ayinakubizwa ngokuba yi-PI grade. Uphando kunye nokusetyenziswa kwe-valve yokupakisha i-valve yobushushu obuphezulu yimveliso eqhelekileyo yomatshini kumashishini anamhlanje. Njengenxalenye yolawulo oluphambili kwinkqubo yokuhambisa ulwelo, isetyenziswa ikakhulu kwibhoyila, kwipayipi yomphunga, ukucocwa kweoyile, ishishini lemichiza, umlilo kunye nesinyithi, ngenxa yokunqunyulwa kwayo, ukulawulwa, ukulawulwa koxinzelelo, ukucima kunye neminye imisebenzi. Ishishini lanamhlanje libeke phambili iimfuno eziphezulu neziphezulu zokuthembeka kwesitywina sevalvu. Ukutywinwa kokwenziwa komsebenzi sisalathiso esibalulekileyo sobugcisa bokuvavanya umgangatho weemveliso zevalvu. Ivalve yobushushu obuphezulu ibhekisa kwivalve ebushushu bayo bokusebenza bungaphezulu kwama-250 ℃. Itekhnoloji yokutywinwa kwe-filler ye-stem ye-valve ephezulu yokushisa ibe yingxaki evelele engazange isombululwe iminyaka emininzi, kwaye iphinde ibe enye yezixhumanisi ezibuthathaka zokuphucula ukuthembeka kwevalve. Ubushushu obuqhelekileyo be-valve yesikhondo sokupakisha itywina lukhona lungonelanga okanye lugqithise itywina, isiqu sevalvu ekuhambeni kwexesha kulula ukuvuza, ukuvuza kwezinto ezinokutsha, eziqhumayo, ezinetyhefu kunye nezinye ezinobungozi hayi nje ukuvalwa kwezityalo kunye nelahleko yezoqoqosho, kodwa kunokubangela ungcoliseko lokusingqongileyo, kunye neengozi zengozi zabasebenzi, ukuba isixhobo siqhuba umngcipheko omkhulu. Okokuqala, umgaqo wevalve yokupakisha isitywina Ukusebenza kokutywinwa kwevalve yisalathiso esibalulekileyo sokuvavanya umgangatho kunye nokusebenza kwevalve. Ngoku ininzi ye-valve yokulawula okanye i-valve ye-stem jikelele kunye nokupakisha uphawu lokutywinwa koqhagamshelwano, ngenxa yesakhiwo sayo esilula, ukuhlanganisana okulula kunye nokutshintshwa, ixabiso eliphantsi kwaye lisetyenziswa. Isiqu se-valve kunye nokupakisha ukuvuza kuyinto eqhelekileyo. Isizathu sokuba ukupakisha kunokudlala indima yokutywinwa, umgaqo wayo ngoku kukho iimbono ezimbini eziphambili zokutywinwa, ngokulandelelana zivelisa isiphumo kunye nesiphumo semaze. Ukupakisha isiphumo sokuthwala kubhekiselele ekupakishweni phakathi kwesigcwalisi kunye nesiqu, ukupakisha ukupakisha kunye naphantsi kwefuthe le-lubricant yangaphandle, ngenxa yoxinzelelo kwindawo yokunxibelelana yesiqu ukwenza umaleko wenwebu yolwelo, ukwenza ukupakisha kunye nesiqu sifane neso. Ukutyibilika, ubudlelwane phakathi kokupakishwa okunjalo kunye nesiqu abuyi kuba ngenxa yokukhuhlana okugqithisileyo kunye nokuguga, kuba ifilimu yolwelo ikhona ngaxeshanye, ukupakishwa kunye nomzuzu we-valve kwimo etywiniweyo. I-Labyrinth yokupakisha isiphumo ibhekiselele kwiqondo eligudileyo lesiqu elingenakufikelela kwinqanaba elincinci, ukupakisha kunye ne-valve stem ihlangene ngokuyinxenye kwaye ayifaneleki ngokupheleleyo, ukupakisha kwaye kuhlala kukho umsantsa omncinci kakhulu phakathi kwe-valve stem, kwaye ngenxa yokuba ye-asymmetry yokusika phakathi kwendibano yokupakisha, ezi zithuba zenze i-maze kunye, ephakathi, apho i-multiple throttling, i-step-down, kwaye ifikelele kwindima yokutywinwa. Impembelelo ye-labyrinth ibhekiselele kwi-valve stem epakisha idigri yomphezulu womgangatho wetywina ayinakufikelela kwinqanaba elincinci, umsantsa omncinci phakathi kwesiqu kunye nokupakisha oku kubukho benjongo, ayinakushenxisa, ukuba kulo mba ukuqhubekeka kuyilo lokupakisha, amaxesha amaninzi isiphumo asikho. ilungile kakhulu, ebangela iimeko ezisisiseko zokuvuza kwendawo okanye ukuvuza kwamandla. Ukutywinwa kwemithombo yeendaba ngokupakisha kunye nomatshini wokuvuza kwe-stem kuneendlela ezininzi: indlela yokuvuza kwe-corrosion gap, i-porous leage mechanism, indlela yokuvuza kwamandla, njl. iindlela zokuvuza, kunye neskim sophuculo olusebenzayo lubekwe phambili. Emibini, uhlobo lwangoku lokupakisha oluqhelekileyo kunye nesicelo 1, ingcambu ye-teflon pan ingcambu yePolytetrafluoroethylene pan ingcambu yenziwe nge-POLYTETRAFluOROethylene ecocekileyo I-DISPERsing resin njengento ekrwada, yokuqala eyenziwe ngefilimu yezinto ezikrwada, kwaye emva koko ngokujija, ukuphotha kwingcambu eyomeleleyo yepani. Olu UHLOBO lwe-disk ingcambu ngaphandle kwezinye izongezo, zingasetyenziselwa ukutya, amayeza, i-papermaking ifayibha yemichiza kunye nezinye iimfuno eziphakamileyo zokucoceka, kwaye zibe ne-corrosive medium kwi-valve, impompo. Ububanzi besicelo: Sebenzisa ubushushu obungekho ngaphezu kwe-260℃, sebenzisa uxinzelelo olungekho ngaphezu kwe-20MPa, ixabiso le-pH: 0-14. 2, ingcambu yediskhi yegraphite eyandisiweyo Eyandisiweyo ingcambu yediskhi yegraphite ikwabizwa ngokuba yingcambu yediskhi yegraphite eguquguqukayo usebenzisa ucingo lwegraphite oluguquguqukayo olulukwe entliziyweni. Ingcambu yediskhi yegraphite eyandisiweyo ineenzuzo zokuzithambisa kakuhle kunye ne-thermal conductivity, i-coefficient encinci ye-friction, i-versatility enamandla, ukuthambile okuhle, amandla aphezulu, kunye nefuthe lokukhusela kwi-shaft kunye nentonga. Ubungakanani besicelo: Sebenzisa ubushushu obungekho ngaphezu kwe-600℃, sebenzisa uxinzelelo olungekho ngaphezu kwe-20MPa, ixabiso le-pH: 0-14. 3. Ingcambu ye-coil ye-graphite eyandisiweyo Ikhoyili yegraphite eyongeziweyo ilukwe ngefiber yeglasi, ucingo lobhedu, ucingo lwensimbi engenasici, i-nickel wire, i-caustic nickel alloy wire kunye nezinye izinto eziqiniswa ngocingo olusulungekileyo olwandisiweyo lwegraphite. Ngeempawu zegraphite eyandisiweyo, kunye nokuguquguquka okunamandla, ukuthamba okuhle, ukomelela okuphezulu. Idityaniswe neengcambu eziphothiweyo ngokubanzi, yenye yezinto ezisebenzayo zokutywina ukusombulula ingxaki yobushushu obuphezulu kunye nokutywinwa koxinzelelo oluphezulu. Ububanzi besicelo: Iqondo lokushisa elisebenzayo alikho ngaphezu kwe-550 ℃, uxinzelelo lokusebenza alukho ngaphezu kwe-32MPa, ixabiso le-pH: 0-14. Ingcambu yediski yinguqulelo eyandisiweyo yengcambu yediskhi yegraphite eyandisiweyo, eyona nto ilungileyo kakhulu yokutywina. Oku ngasentla kudwelisa iintlobo ezininzi eziqhelekileyo zokupakisha iingcambu zediski. Kweyona nkqubo yokuvelisa, kuya kubakho ezinye iintlobo zokupakisha iingcambu zediski eziphuhliswe iimeko ezikhethekileyo zokusebenza. Umzekelo, ukuxhathisa okulungileyo kweekhemikhali ze-aramid fiber coil ingcambu; Ifanelekile kwi-axis yokujikeleza komthwalo ophezulu i-arylon fiber fiber edibeneyo i-coil root, njl., eli phepha lilinganiselwe kwindawo, kungekhona intshayelelo eneenkcukacha. Isithathu, isakhiwo sokupakisha ivalve eqhelekileyo kunye nokukhethwa Isiqu esiqhelekileyo sokupakisha isakhiwo sokutywina siqulunqwe ikakhulu ngepleyiti yoxinzelelo, igland, i-spacer kunye nokupakisha. Ukuze kuphunyezwe umphumo wokutywina, ukupakishwa ngokuqhelekileyo kufuneka kube nesakhiwo esixineneyo, ukuzinza kweekhemikhali okulungileyo, i-coefficient ephantsi ye-friction. Ngokubanzi, iqondo lobushushu lingaphantsi kwe-200 ℃, i-filler isoloko ikhethwa i-polytetrafluoron disc root, eneempawu zokuthambisa okuphezulu, ukungabonakali kwe-viscosity, ukugqunywa kombane kunye nokumelana nokuguga okulungileyo, kwaye isetyenziselwa i-petroleum, ikhemikhali, i-pharmaceuticals kunye nezinye. amasimi. Ingcambu ye-graphite ye-disc ikhethwe ngenxa yokumelana nokushisa okuphezulu, i-self-lubrication kunye ne-coefficient ephantsi ye-friction kumaqondo okushisa ukusuka kwi-200 ukuya kwi-450. iimeko zokwenyani zokusebenza zohlobo olufanelekileyo lwediski yegraphite, njenge-250 ℃, iimeko zoxinzelelo oluphantsi zingakhetha idiski eyandisiweyo yegraphite, uxinzelelo oluphakathi kunye noluphezulu lunokukhetha idiski yegraphite ephuculweyo okanye indibaniselwano yazo zombini. Okwesine, ubushushu obuphezulu bevalve yokupakisha uhlalutyo lokuvuza Ngaphantsi kweemeko eziphezulu zokushisa, njengokukhethwa kwe-graphite disc root root seal structure, kulula ukubonakala ukuvuza. Izizathu zezi zilandelayo: Ingcambu ye-graphite yediski ifakwe kwibhokisi yokupakisha, kwaye uxinzelelo lwe-axial kwi-packing lusetyenziswa ngokuqinisa i-bolt yokuqinisa kwi-gland yokupakisha. Ngenxa yokuba ukupakisha kunomlinganiselo othile weplastiki, uxinzelelo lwe-axial emva koxinzelelo lwe-radial kunye ne-micro deformation, umngxuma wangaphakathi kunye nesiqu esisondeleyo, kodwa oku kuhambelanayo akufaniyo phezulu nangaphantsi. Ngokutsho kokusasazwa koxinzelelo lokupakisha kunye nokupakisha amandla okutywinwa, kunokubonwa ukuba ukunyanzeliswa kokupakisha okuphezulu kunye nokupakisha okuphantsi kwibhokisi yokupakisha akufani. I-deformation yeplastiki yeengxenye ezimbini zokupakisha ayihambelani ngokuthe ngqo, kwaye kulula ukutywinwa okugqithisileyo okanye okunganeleyo phakathi kokupakisha kunye ne-valve stem. Kwangaxeshanye, ukungqubana phakathi kokupakisha kunye nesiqu sevalve kuya kuba kuninzi xa amandla oxinzelelo lweradial kufuphi negland eninzi, kwaye isiqu sevalve kunye nokupakishwa kulula ukunxiba apha. Kwimeko yobushushu obuphezulu, ubushushu obuphezulu, ukwanda okukhulu kwengcambu ye-graphite disc, ukukhuhlana kuyanda, ukuchithwa kobushushu okubangelwa ubushushu obuphezulu akufikanga ngexesha elifanelekileyo, ukukhawulezisa izinga lokunxiba kwesiqu kunye nokupakisha, eyona nto iphambili. isizathu sokuvuza kokupakisha kwevalve yobushushu obuphezulu. Isihlanu, i-valve ephezulu yokupakisha ukwakhiwa kwesakhiwo sokuphucula i-Valve yokupakisha phantsi kweemeko eziphezulu zokushisa zithandwa kakhulu ukuvuza, kwaye ukupakishwa kobushushu obuphezulu ngokuqhelekileyo kusekelwe kwidiskhi yegraphite eyandisiweyo. I-self-lubricity kunye nokudumba kokupakisha okwandisiweyo kwegraphite kulungile, i-coefficient ye-rebound iphezulu, kodwa into engalunganga i-ethe-ethe, ukumelana nokucheba okungalunganga, kufakwe ngokubanzi kumbindi webhokisi yokupakisha, ukuthintela ukwandiswa kokupakishwa kwegraphite ngokupakisha idlala. kunye nomonakalo ophantsi wephedi ye-extrusion; Ingcambu yediskhi yegraphite eyomeleziweyo inokufakwa phezulu nasezantsi kuba iqulethe ucingo lwenikeli kwaye yomelele kwaye iyakwazi ukumelana ne-extrusion. Nangona indibaniselwano eyandisiweyo yegraphite kunye nediski yegraphite eyandisiweyo isombulula inxalenye yokupakisha ukuvuza kwiqondo lokushisa eliphezulu. Kodwa ngenxa yesenzo sevalve yimeko yokusebenza rhoqo, izinga lokunxiba idiskhi yegraphite liphezulu kakhulu, ukusetyenziswa kwexesha elithile emva kwesidingo sokuqinisa iibholithi zokuqinisa kwibhokisi yokugxusha, kuba incwadi kunye nokuhlola kuzise ingxaki enkulu. Ngokusekelwe kwingqwalasela yale ngxaki ingasentla, sidityaniswe noncwadi lwasekhaya nakwamanye amazwe kunye namava aqokelelwe kwiminyaka yakutshanje ukuphuhlisa isakhiwo sokupakisha ivalve, ngakumbi kwiimeko ezahlukeneyo zokusebenza, ubushushu obuphezulu kunye noxinzelelo oluphantsi kunye nobushushu obuphezulu kunye noxinzelelo oluphezulu, uphuhliso ekujoliswe kulo ubushushu obuphezulu isakhiwo ukupakisha, ukusombulula ivelufa phantsi kwemeko lobushushu eliphezulu ukuvuza lula. Ubushushu obuphezulu kunye nohlobo loxinzelelo oluphantsi, usebenzisa intwasahlobo ekhethekileyo yokuhlawulela umsesane kunye nendibaniselwano yeengcambu zegraphite disc edibeneyo. Uxinzelelo olusebenzayo aluphezulu, ngoko ke umkhono wokupakisha uyacinywa. Umsesane okhethekileyo wembuyekezo wentwasahlobo wongezwa ngaphantsi kwebhokisi yokugxusha. Xa ufaka, iibholiti kufuneka ziqiniswe ngokulayishwa kwangaphambili okuthile. Nokuba ukupakishwa kwegraphite kunye nesiqu kubonakala ukuguga, isipringi seringi sinokwenza ngokukhawuleza uhlengahlengiso oluhambelanayo lwembuyekezo ukuqinisekisa ukuvuza kwevalve. Chwetheza ubushushu obuphezulu kunye noxinzelelo oluphezulu, olu luhlobo lwenkqubo yokupakisha ephezulu, ithatha i-disc spring kunye ne-spring spring yangaphandle kabini isakhiwo sembuyekezo, inokuphepha inzuzo yobushushu obuphezulu bokukhubaza intwasahlobo, olu hlobo lwemeko, ngakumbi kubushushu obuphezulu, uxinzelelo oluphezulu. imbuyekezo point ukusilela kwindawo enye, elinye iqela lembuyekezo lisasebenza, zombini ukungaphazamisi, imbuyekezo enye kodwa kwangaxeshanye ukupakisha umsebenzi. I-disc spring seal iphinda iququzelele ukusetyenziswa kwiimeko ezinqabileyo zangaphandle, kunye nesakhiwo sangaphandle samanqaku amabini embuyekezo siququzelela ukutshintshwa ngaphandle kokususa yonke ibhokisi yokufaka, ukuphucula ukusebenza kunye nokulula ukusebenza. Emva kokulandelwa kwexesha elide lomsebenzisi, olu hlobo lwesakhiwo sokupakisha ukushisa okuphezulu, ukutywinwa kwe-stem yoxinzelelo oluphezulu ukukhusela umphumo wokuvuza kubonakala, ubomi benkonzo ende.