Umphezulu wokutywina wevalve, isiqu kunye nesiqu sentongomane yenkcazelo yevalve yendawo ilindele inkampani yevalvu ukuba ithathe amanyathelo afanelekileyo.

Umphezulu wokutywina wevalve, isiqu kunye nesiqu sentongomane yenkcazelo yevalve yendawo ilindele inkampani yevalvu ukuba ithathe amanyathelo afanelekileyo.

Umphezulu wokutywina bubuso obuphambili bokusebenza kwevalve. Umgangatho wokutywina uhambelana nobomi benkonzo yevalve. Ngokwesiqhelo, indawo yokutywina kufuneka ithathele ingqalelo ukunganyangeki kwe-corrosion, ukuxhathisa ukonakala, ukuxhathisa ukhukuliseko, ukumelana ne-oxidation kunye nezinye izinto. I-stem nut ixhomekeke ngokuthe ngqo kwi-axial force yesiqu ngexesha lokuvulwa kwevalve kunye nokuvala kwaye ngoko kufuneka ibe namandla athile. Ngexesha elifanayo, lixutywe nge-stem, lifuna i-coefficient encinci ye-friction, akukho rust kwaye ugweme into yokuluma. I-Stem NUTS ENE-CLUTCHES ZE-melon UKUSETYENZISWA KWIIVAVVVU ZOMZIMBA ZIFUNA UKUNYANGWA KOBUSHUSHU NGOBUQHUMENI OBUPHAKAMILEYO OKANYE UBUNZIMA boMphezulu.
Izinto ezingaphezulu zokutywina
Umphezulu wokutywina bubuso obuphambili bokusebenza kwevalve. Umgangatho wokutywina uhambelana nobomi benkonzo yevalve. Ngokwesiqhelo, indawo yokutywina kufuneka ithathele ingqalelo ukunganyangeki kwe-corrosion, ukuxhathisa ukonakala, ukuxhathisa ukhukuliseko, ukumelana ne-oxidation kunye nezinye izinto.
Kudla ngokubakho iindidi ezimbini eziphambili:
(1) Izinto ezithambileyo
I-1, irabha (kubandakanya irabha yebutadiene, irabha enefluorine, njl.njl.)
2, iplastiki (PTFE, nayiloni, njl.)
(2) izinto zokutywina eziqinileyo
I-1, i-alloy yobhedu (yevalve yoxinzelelo oluphantsi)
2, intsimbi yechromium (yevalve eqhelekileyo yoxinzelelo oluphezulu)
I-3, i-Sitai alloy (yeqondo lokushisa eliphezulu kunye ne-valve yoxinzelelo oluphezulu kunye ne-corrosion valves eyomeleleyo)
4. I-nickel base alloy (yeendaba ezidlekayo)
Izinto zesiqu
Isiqu siphantsi kokutsalwa, ukucinezela kunye nemikhosi ye-torsional ngexesha lokuvulwa kwevalve kunye nokuvala, kwaye inxibelelana ngokuthe ngqo ne-medium ngelixa.
KUKHONA UKUHAMBA KWEFRICTION PHAKATHI NOKUPAKISHWA, NGOKO I-STEM MATERIAL MAYIBE NAMANDLA OWANELELEYO KUNYE NEMPEMBELELO KUBUFUNGUMVU EZITHILE.
Ukuqina, ukuxhathisa umhlwa kunye nokuxhathisa i-abrasion, kunye neteknoloji elungileyo.
Izinto eziqhelekileyo zesikhondo zezi zilandelayo.
Okokuqala, carbon steel
Xa isetyenziswe emanzini kunye ne-steam medium kunye noxinzelelo oluphantsi kunye nobushushu obuphakathi obungadluli kwi-300 ℃, i-A5 eqhelekileyo ye-carbon steel ikhethwa ngokubanzi.
Uxinzelelo oluphakathi kunye nobushushu obuphakathi aludluli i-450 ℃ yamanzi, i-steam medium, khetha ngokubanzi i-35 ye-carbon steel quality.
Ababini, intsimbi ye-alloy
Kuxinzelelo oluphakathi kunye noxinzelelo oluphezulu, ubushushu obuphakathi abudluli kuma-450 ℃ amanzi, umphunga, i-oyile kunye nolunye uhlobo lweendaba, ngokubanzi khetha i-40Cr (intsimbi yechromium).
Kuxinzelelo oluphezulu, ubushushu obuphakathi abudluli kwi-540 ℃ amanzi, umphunga kunye nezinye imidiya, ungakhetha i-38CrMo>
Kuxinzelelo oluphezulu, ubushushu obuphakathi abugqithi kwi-570℃ umphunga ophakathi, khetha ngokubanzi i-25Cr2MoVA chromium molybdenum vanadium intsimbi.
Ezintathu, intsimbi yeasidi engatyiwayo
Kuxinzelelo oluphakathi kunye noxinzelelo oluphezulu, iqondo lobushushu eliphakathi alidluli kwi-450 ℃ eliphakathi elingadlekiyo kunye neliphakathi elibuthathaka, linokukhetha i-1Cr13, 2Cr13, 3Cr13 chromium yentsimbi. Kwimithombo yeendaba ezonakalisayo, i-Cr17Ni2, i-1Cr18Ni9Ti, i-Cr18Ni12Mo2Ti, i-Cr18Ni12Mo3Ti kunye nenye intsimbi enganyangekiyo ye-asidi kunye ne-PH15-7mO i-precipitation intsimbi eqinile ingakhethwa.
Isine, intsimbi ekwazi ukumelana nobushushu
4Cr10Si2Mo Martensite uhlobo lwentsimbi enganyangekiyo kubushushu kunye nentsimbi ingasetyenziswa xa ubushushu obuphakathi bungekho ngaphezu kwama-600 ℃
4Cr14Ni14W2Mo Austenitic uhlobo intsimbi ukumelana nobushushu.
Isixhobo se-Stem nut
I-stem nut ixhomekeke ngokuthe ngqo kwi-axial force yesiqu ngexesha lokuvulwa kwevalve kunye nokuvala kwaye ngoko kufuneka ibe namandla athile. Ngexesha elifanayo, lixutywe nge-stem, lifuna i-coefficient encinci ye-friction, akukho rust kwaye ugweme into yokuluma.
Okokuqala, i-alloy yobhedu
I-coefficient ye-alloy friction coefficient incinci, akukho mhlwa, yenye yezinto ezisetyenziswa ngokuqhelekileyo. Kwi-PG1.6mpa i-valve yoxinzelelo oluphantsi lwe-ZHMN58-2-2 i-cast cast bras ingasetyenziswa. Kwi-PG16-6.4mpa ivalve yoxinzelelo oluphakathi ingasebenzisa i-ZQ>
Okwesibini, intsimbi
Xa iimeko zokusebenza zingavumeli ukusetyenziswa kwe-alloy yobhedu, ungakhetha i-35, i-40 ye-carbon steel quality, i-2Cr13, i-1Cr18Ni9, i-Cr17Ni2 kunye nezinye i-acid-resistant-resistant steel.
Iimeko zokusebenza azivumelekanga ukuba zibhekiselele koku kulandelayo.
I-1, yevalve yombane, i-valve stem nut ene-melon clutch, kufuneka iphathwe ubushushu ukuze ifumane ubunzima obuphezulu okanye ubulukhuni bomhlaba.
I-2, indawo yokusebenza okanye indawo engqongileyo ayifanelekanga ukukhethwa kwe-alloy yobhedu, njenge-corrosion yethusi ye-ammonia medium. Xa ukhetha i-steel stem nuts, ingqalelo ekhethekileyo kufuneka ihlawulwe kwi-phenomenon of thread bite.
Le minyaka imbalwa izayo iya kuba lixesha lokothuka kwesantya esiphezulu soshishino lwevalvu, isiphumo esithe ngqo solu hlobo lomothuko lwesantya esiphezulu yindlela ekhoyo ngoku yokwahlulwa-hluzwa kwecala kwinkampu yophawu lwekhabhathi yevalvu ukuze kwandiswe.
Kulindeleke ukuba kule minyaka imbalwa izayo iphile ngenene kumashishini eevalvu zentengiso ayininzi kangako.
Kodwa ushishino lwevalvu olu lothuko lukhawulezayo luya kuzisa amathuba amahle, iziphumo zokothuka ziya kwenza ukuba ukusebenza kwentengiso kube nengqiqo ngakumbi.