Umahluko phakathi kwesitywina esithambileyo kunye nesitywina esiqinileyo sevalvu
2022-08-17
Umahluko phakathi kwetywina elithambileyo kunye netywina eliqinileyo levalve Ukongeza kwivalve ekwaziyo ukumelana nomhlwa, ivelufa eqhelekileyo yokutywina ethambileyo ibhekisa kwispool okanye isihlalo semathiriyeli ezibini ezingezizo ezentsimbi (ikakhulu i-PTFE, irabha, njl. njl.) yevalve. Isiphumo sokutywina sevalve yokutywina ethambileyo ingcono, kodwa kufakelo lombhobho, ukucocwa kwenkqubo kunokushiya inkunkuma engaphezulu okanye encinci engacocekanga (efana ne-welding slag, iifayili zentsimbi, njl.njl.), zihamba ngevalve elawulayo, kulula ukukrwela ukuthambile. isihlalo sokutywina okanye i-spool, ukwenzela ukuba inani lokuvuza linyuke, ukuthembeka kwesitywina akubi. Ke ngoko, ukhetho lwesakhiwo sokutywinwa esithambileyo kufuneka sithathele ingqalelo ukucocwa okuphakathi kunye nombhobho ongqongqo wokugungxulwa phambi kokuba usebenze. Isitywina esithambileyo kunye nomahluko wetywina olukhuni: (1) Isitywina esithambileyo Ukongeza kwivalve ekwazi ukumelana nokudleka, ivelufa eqhelekileyo yokutywina ethambileyo ibhekisa kwi-spool okanye isihlalo sesinye sezinto ezimbini ezingezizo ezentsimbi (ikakhulu i-PTFE, irabha, njl.njl. ) uhlobo olutywiniweyo lwevalve. Isiphumo sokutywina sevalve yokutywina ethambileyo ingcono, kodwa kufakelo lombhobho, ukucocwa kwenkqubo kunokushiya inkunkuma engaphezulu okanye encinci engacocekanga (efana ne-welding slag, iifayili zentsimbi, njl.njl.), zihamba ngevalve elawulayo, kulula ukukrwela ukuthambile. isihlalo sokutywina okanye i-spool, ukwenzela ukuba inani lokuvuza linyuke, ukuthembeka kwesitywina akubi. Ke ngoko, ukhetho lwesakhiwo sokutywinwa esithambileyo kufuneka sithathele ingqalelo ukucocwa okuphakathi kunye nombhobho ongqongqo wokugungxulwa phambi kokuba usebenze. (2) Itywina eliqinileyo Ukutywinwa okuqinileyo kunye nokujonga phezulu kwe-alloy engagugiyo lukhetho olungcono lokusika iivalvu. Le ndlela ekuqwalaseleni ukutywinwa kunye nokuqwalasela ubomi benkonzo kunye nokuthembeka, nangona isalathiso sefektri singu-10-6 ~ 10-8 kuphela, asikwazi ukuphumeza umphumo wokuvuza kwetywina elithambileyo, kodwa ngokwaneleyo ukuhlangabezana neemfuno zokunqunyulwa okuqinileyo, kwaye ihlala ixesha elide, ngokwembono yezoqoqosho ibiza kakhulu. Imodeli yevalufa ukuhlela intsingiselo Iimodeli ezahlukeneyo zevalve hlela intsingiselo enjengesihloko; BZ 3 4 1 H _16 C (B) ikhowudi yesakhiwo esikhethekileyo; (Z) Uhlobo lwekhowudi; (3) Ikhowudi yendlela yokuqhuba; (4) Ikhowudi yefom yoqhagamshelo; (1) Ikhowudi yefom yesakhiwo B..... Uhlobo lokugquma X... Inkuku 0... Isixhobo sombane sombane 1... Umsonto wangaphakathi D..... Uhlobo lobushushu obuphantsi D... Ivalve yebhabhathane 1.. I-electromagnetic fluid 2... intambo yangaphandle F...... Uhlobo lomlilo H... Ivalve yetshekhi 2... Ihydraulic yombane 4... iflange H..... Ukuvala kancinane uhlobo J... Globe ivelufa 3... I-turbine 6... edityanisiweyo Isango 5... Isixhobo se-Bevel 8... i-clamp W... I-Bellows uhlobo 6... I-pneumatic 9... Iseti yekhadi 7... i-hydraulic 8... i-Gas-liquid motion 9... umbane (H) Ikhowudi yemathiriyeli yokutywina (16) Iklasi yoxinzelelo (C) imathiriyeli yomzimba B.... Babbitt 10... 1.0 Mpa C... Carbon steel D.... Nitriding steel 16... 1.6 Mpa F... Low carbon steel F.... Fluorine plastic 25... 2.5 Mpa I... Chrome molybdenum steel H... Cr13 stainless steel 40..... 4.0 Mpa P... Chromium-nickel steel stainless J... . Uyilo lwerabha 63... 6.3 Mpa R... I-Chromium-nickel-molybdenum insimbi engatyiwayo V... Molybdenum chrome vanadium steel W. Ngokufanayo njengeyona nto ingundoqo 250.. 25.0 Mpa X... Irabha 320.. 32.0 Mpa Y... Cemented carbide 420.. 42.0 Mpa