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.

Isisombululo esilula kunye nesona sisebenzayo kukunyusa ubungakanani be-valve core yokutywinwa kwendawo, ukwenzela ukuba ububanzi obuncinci be-valve core end face bube yi-1 ukuya kwi-5 mm encinci kune-diameter yesihlalo se-valve, kwaye inesikhokelo esaneleyo sokuqinisekisa ukuba i-valve core ikhokelwa kwisihlalo se-valve kwaye igcina uqhagamshelwano olulungileyo lokutywinwa kwendawo.