1.Yongeza igrisi yokutywina

Kwiivalvu ezingasebenzisi igrisi yokutywina, cinga ngokufaka igrisi yokutywina ukuphucula ukusebenza kwesikhondo sevalve.

2. Yongeza isigcwalisi

Ukuze kuphuculwe ukusebenza kokutywinwa kokupakisha kwi-valve stem, indlela yokongeza ukupakisha ingasetyenziswa.Ngokuqhelekileyo, i-double-layer okanye i-multi-layer mix fillers isetyenziswa.Ukwandisa nje ubuninzi, njengokwandisa inani ukusuka kwiinqununu ezi-3 ukuya kwii-5, aziyi kuba nesiphumo esicacileyo.

3. Faka indawo yokuzalisa igraphite

Ukupakishwa kwePTFE esetyenziswa kakhulu kunobushushu obusebenzayo kuluhlu lwe -20 ukuya +200°C.Xa iqondo lokushisa litshintsha kakhulu phakathi kwemida ephezulu kunye nesezantsi, ukusebenza kwayo kokutywinwa kuya kuncipha kakhulu, kuya kuguga ngokukhawuleza kwaye ubomi bayo buya kuba bufutshane.

I-Flexible graphite fillers yoyisa ezi ntsilelo kwaye inobomi obude benkonzo.Ngoko ke, ezinye iifektri zitshintshile yonke i-PTFE yokupakisha kwi-graphite yokupakisha, kwaye kunye neevalve zokulawula ezisanda kuthengwa zisetyenzisiwe emva kokutshintsha i-PTFE yokupakisha ngokupakisha igraphite.Nangona kunjalo, i-hysteresis yokusebenzisa i-graphite filler inkulu, kwaye ngamanye amaxesha ukukhasa kwenzeka ekuqaleni, ngoko kufuneka kuqwalaselwe oku.

4. Guqula ikhondo lokuhamba kwaye ubeke i-P2 kwisiqu sevalve.

Xa i-△P inkulu kwaye i-P1 inkulu, ukutywina i-P1 ngokucacileyo kunzima kunokutywina i-P2.Ngoko ke, ulwalathiso lokuhamba lunokutshintshwa ukusuka kwi-P1 kwi-valve stem end ukuya kwi-P2 ekupheleni kwe-valve stem, esebenza ngakumbi kwiivalve ezinoxinzelelo oluphezulu kunye nokwahlukana okukhulu koxinzelelo.Umzekelo, iivalvu ze-bellows kufuneka ziqwalasele ukutywina i-P2.

5. Sebenzisa i-lens gasket ukutywinwa

Ukutywinwa kwamaqweqwe aphezulu nangaphantsi, ukutywinwa kwesihlalo sevalve kunye nemizimba yevalve ephezulu nasezantsi.Ukuba isitywina esisicaba, phantsi kobushushu obuphezulu kunye noxinzelelo oluphezulu, ukusebenza kokutywinwa kubi, kubangele ukuvuza.Ungasebenzisa i-lens gasket seal endaweni yoko, enokufikelela kwiziphumo ezanelisayo.

6. Buyisela i-gasket yokutywina

Ukuza kuthi ga ngoku, uninzi lweegasket zokutywina zisasebenzisa iibhodi zeasbestos.Kwiqondo lokushisa eliphezulu, ukusebenza kokutywinwa kubi kwaye ubomi benkonzo bufutshane, kubangela ukuvuza.Kule meko, ungasebenzisa i-spiral wound gaskets, "O" iindandatho, njl., apho iifektri ezininzi ziye zamkela ngoku.

7. Qinisa iibholithi ngokwe-symmetrically kwaye utywine ngee-gaskets ezincinci

Kwisakhiwo sevalve elawulayo ene-"O" ring seal, xa kusetyenziswa i-gaskets engqingqwa ene-deformation enkulu (njengamashiti ajikelezayo) ukuba i-compression i-asymmetrical kwaye i-force i-asymmetrical, isitywina siya konakaliswa ngokulula, sithambekile kwaye siguqulwe.Kuchaphazela kakhulu ukusebenza kokutywinwa.

Ngoko ke, xa kulungiswa kwaye kuhlanganiswa olu hlobo lwe-valve, ii-bolts zoxinzelelo kufuneka ziqiniswe ngokulinganayo (qaphela ukuba azikwazi ukuqiniswa kanye kanye).Kuya kuba ngcono ukuba i-gasket enzima ingatshintshwa ibe yi-gasket encinci, enokunciphisa ngokulula ukuthambekela kunye nokuqinisekisa ukutywinwa.

8.Ukwandisa ububanzi bomphezulu wokutywina

Umbindi wevalve esicaba (njengeplagi yevalve yevalve enendawo-mbini kunye nevalve yomkhono) ayinaso isikhokelo kunye nesikhokelo somphezulu ogobileyo kwisitulo sevalve.Xa ivalve isebenza, i-valve core ixhomekeke kumandla asecaleni kwaye iphuma iphuma kwicala lokungena.I-Square, i-gap ehambelanayo ye-valve core, ibaluleke ngakumbi le nto i-unilateral iya kuba.Ukongeza, i-deformation, i-non-concentricity, okanye i-chamfering encinci ye-valve core yokutywina indawo (ngokubanzi i-30 ° chamfering yesikhokelo) iya kubangela ukutywinwa kwevalve engundoqo xa isondele ekuvaleni.Ubuso besiphelo esine-chamfered bubekwe kwindawo yokutywina yesitulo sevalve, ebangela ukuba undoqo wevalve utsibe xa uvala, okanye ungavali kwaphela, kwandisa kakhulu ukuvuza kwevalve.

Esona sisombululo silula nesona sisebenzayo kukunyusa ubungakanani bomphezulu wevalve engundoqo wokutywina, ukuze ubuncinci bedayamitha yobuso besiseko sevalve ibe yi-1 ukuya kwi-5 mm encinci kunobubanzi besihlalo sevalve, kwaye inesikhokelo esaneleyo sokuqinisekisa ukuba ivalve. Undoqo ukhokelelwa kwisitulo sevalve kwaye ugcina uqhagamshelwano olulungileyo lomphezulu wokutywina.