Indawo yokuvala i-valve, isiqu kanye ne-stem nut Incazelo ye-valve yasendaweni ilinde inkampani yama-valve ukuthi ithathe izinyathelo ezifanele.

Indawo yokuvala i-valve, isiqu kanye ne-stem nut Incazelo ye-valve yasendaweni ilinde inkampani yama-valve ukuthi ithathe izinyathelo ezifanele.

Indawo yokuvala iwubuso obubalulekile bokusebenza be-valve. Ikhwalithi yendawo yokubeka uphawu ihlobene nempilo yesevisi ye-valve. Imvamisa, indawo yokuvala uphawu kufanele icabangele ukumelana nokugqwala, ukumelana nokuhuqwa, ukumelana nokuguguleka, ukumelana ne-oxidation nezinye izici. I-stem nut ibhekene ngqo namandla e-axial yesiqu ngesikhathi sokuvula nokuvala i-valve ngakho-ke kufanele ibe namandla athile. Ngesikhathi esifanayo, ifakwe nge-stem, idinga i-coefficient encane yokungqubuzana, akukho ukugqwala futhi igweme into yokuluma. I-Stem NUTS ANEZINHAMBI ZEKHABE UKUZE ASENZISELWE KUMVAVAVU KAgesi ADINGA UKWELASHWA OKUSHISA NGOBUQINISO OKUPHEZULU NOMA UBUKHUNI BESE.
Izinto ezingaphezulu zokuvala
Indawo yokuvala iwubuso obubalulekile bokusebenza be-valve. Ikhwalithi yendawo yokubeka uphawu ihlobene nempilo yesevisi ye-valve. Imvamisa, indawo yokuvala uphawu kufanele icabangele ukumelana nokugqwala, ukumelana nokuhuqwa, ukumelana nokuguguleka, ukumelana ne-oxidation nezinye izici.
Ngokuvamile kuba nezigaba ezimbili eziyinhloko:
(1) Izinto ezithambile
1, irabha (kubandakanya irabha ye-butadiene, irabha ye-fluorine, njll.)
2, ipulasitiki (PTFE, inayiloni, njll.)
(2) izinto zokuvala eziqinile
I-1, i-alloy yethusi (ye-valve yokucindezela okuphansi)
2, insimbi engagqwali ye-chromium (yevalvu evamile yomfutho ophezulu)
I-3, i-Sitai alloy (yezinga lokushisa eliphezulu kanye nama-valve omfutho ophezulu kanye nama-valve okugqwala aqinile)
4. I-nickel base alloy (yemidiya ebolayo)
Izinto zesiqu
Isiqu singaphansi kokudonsa, ukucindezelwa kanye namandla ashukumisayo ngesikhathi sokuvulwa nokuvala i-valve, futhi sithintana ngqo ne-medium ngenkathi
FUTHI KUKHONA UKUQHUBEKA KWEFRICTION OKUHLOBANE PHAKATHI NOKUPAKISHA, KHONA I-STEM MATERIAL KUMELE IBE NAMANDLA Anele FUTHI NOMTHELELA Emazingeni Okushisa Acacisiwe.
Ukuqina, ukumelana nokugqwala nokumelana nemihuzuko, nobuchwepheshe obuhle.
Izinto ezivamile ze-stem yilezi ezilandelayo.
Okokuqala, carbon steel
Uma isetshenziswa emanzini naphakathi kwesitimu esinomfutho ophansi kanye nezinga lokushisa eliphakathi nendawo elingeqi ku-300 ℃, i-A5 common carbon steel ngokuvamile ikhethwa.
Ukuze ingcindezi medium and lokushisa medium ingeqi 450 ℃ amanzi, umusi medium, ngokuvamile khetha 35 izinga carbon steel.
Okubili, i-alloy steel
Ngomfutho ophakathi nendawo nomfutho ophakeme, izinga lokushisa eliphakathi alidluli ku-450 ℃ amanzi, umusi, uwoyela kanye neminye imidiya, ngokuvamile ukhetha i-40Cr (insimbi ye-chromium).
Ngomfutho ophakeme, izinga lokushisa eliphakathi alidluli ku-540 ℃ amanzi, umusi neminye imidiya, ungakhetha 38CrMo>
Ngomfutho ophezulu, izinga lokushisa eliphakathi alidluli ku-570℃ medium steam, ngokuvamile khetha i-25Cr2MoVA chromium molybdenum vanadium steel.
Ezintathu, insimbi engagqwali ene-asidi
Ngomfutho ophakathi nendawo nomfutho ophezulu, izinga lokushisa eliphakathi alidluli ku-450 ℃ okuphakathi okungagqwali kanye nendawo edlayo ebuthakathaka, ingakhetha 1Cr13, 2Cr13, 3Cr13 chromium insimbi engagqwali. Okwemidiya eqala ukugqwala, i-Cr17Ni2, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, Cr18Ni12Mo3Ti nezinye insimbi engagqwali engamelana ne-asidi kanye nensimbi eqinisa imvula engu-PH15-7mO.
Okwesine, insimbi ekwazi ukumelana nokushisa
I-4Cr10Si2Mo Martensite uhlobo lwensimbi nensimbi ekwazi ukumelana nokushisa kungasetshenziswa uma izinga lokushisa eliphakathi nendawo lingekho ngaphezu kuka-600 ℃.
4Cr14Ni14W2Mo Austenitic uhlobo lwensimbi ekwazi ukumelana nokushisa.
Impahla ye-stem nut
I-stem nut ibhekene ngqo namandla e-axial yesiqu ngesikhathi sokuvula nokuvala i-valve ngakho-ke kufanele ibe namandla athile. Ngesikhathi esifanayo, ifakwe nge-stem, idinga i-coefficient encane yokungqubuzana, akukho ukugqwala futhi igweme into yokuluma.
Okokuqala, ingxube yethusi
I-Copper alloy friction coefficient incane, ayikho nokugqwala, ingenye yezinto ezisetshenziswa kakhulu. Ku-PG1.6mpa ama-valve okucindezela okuphansi kwe-ZHMN58-2-2 ithusi eliphonswe lingasetshenziswa. Ku-PG16-6.4mpa medium pressure valve ingasebenzisa i-ZQ>
Okwesibili, insimbi
Lapho izimo zokusebenza zingavumeli ukusetshenziswa kwe-alloy yethusi, ungakhetha i-35, i-40 yekhwalithi ye-carbon steel, i-2Cr13, i-1Cr18Ni9, i-Cr17Ni2 nezinye insimbi engagqwali engamelana ne-asidi.
Izimo zokusebenza azivunyelwe ukubhekisela kokulandelayo.
I-1, ye-valve kagesi, i-valve stem nut ene-melon clutch, idinga ukuphathwa ngokushisa ukuze ithole ubulukhuni obuphezulu noma ubulukhuni bobuso.
2, indawo yokusebenza noma indawo ezungezile ayifanele ukukhethwa kwe-alloy yethusi, njengokugqwala kwethusi kwe-ammonia medium. Lapho ukhetha amantongomane e-steel stem, ukunakwa okukhethekile kufanele kukhokhwe kumkhuba wokulunywa kwentambo.
Iminyaka embalwa ezayo kuzoba isikhathi sokushaqeka kwesivinini esikhulu semboni yama-valve, umphumela oqondile walokhu kushaqeka kwesivinini esikhulu ukuthambekela kwamanje kokuhlukaniswa kwekhempu ye-valve brand brand ukuze kwandiswe.
Kulindeleke ukuthi eminyakeni embalwa ezayo kungaba ngempela ukusinda emakethe valve amabhizinisi ababaningi kangaka.
Kodwa imboni ye-valve lokhu kushaqeka kwesivinini esikhulu kuzoletha amathuba amahle, imiphumela yokushaqeka izokwenza ukusebenza kwemakethe kube okunengqondo.