I-coefficient yokuhamba kunye ne-cavitation coefficient yevalve ichazwe kwitheyibhile yokuthelekisa uxinzelelo kunye nobushushu bezinto zevalve.

I-coefficient yokuhamba kunye ne-cavitation coefficient ye-valve ichazwe kwitheyibhile yokuthelekisa uxinzelelo kunye nobushushu bempahla ye-valve I-parameter ebalulekileyo ye-valve yi-coefficient yokuhamba kunye ne-cavitation coefficient ye-valve, efumaneka ngokubanzi kwidatha yeevalve eziveliswayo. kumazwe ahambele phambili kwezoshishino, kwaye ashicilelwe kwisampulu. Ilizwe lethu livelisa ivalve ngokusisiseko ayinalo ulwazi lwenkalo, kuba ukufumana lo mba wedatha kufuneka wenze uvavanyo ukuze ukwazi ukubeka phambili, eli lizwe lethu kunye nenqanaba eliphambili lehlabathi lomsantsa wevalve enye yentsebenzo ebalulekileyo. . A, i-valve flow coefficient I-valve flow coefficient ngumlinganiselo wesalathisi sokuqukuqela kwevalvu, ixabiso le-coefficient ye-flow coefficient, ukuhamba kwamanzi kwivalve xa ilahleko yoxinzelelo incinci. Ngokwe-KV ixabiso leformula yokubala Apho: KV -- flow coefficient Q -- flow flow m3/h δ P -- valve loss loss barP -- Uxinaniso lolwelo kg/m3 Zimbini, i-valve cavitation coefficient I-cavitation coefficient δ ixabiso lisetyenziselwa ukumisela luhlobo luni lolwakhiwo lwevalvu ukukhetha kulawulo lokuhamba. Kuphi: H1 - uxinzelelo mH2 -- umahluko phakathi koxinzelelo lwe-atmospheric kunye noxinzelelo lomphunga ogcweleyo ohambelana nobushushu M δ P -- umahluko phakathi koxinzelelo ngaphambi nangemva kwe-valve M I-coefficient ye-cavitation evumelekileyo δ iyahluka phakathi kweevalve ngenxa yokucwangciswa kwazo ezahlukeneyo. Njengoko kubonisiwe kumfanekiso. Ukuba i-coefficient ye-cavitation edibeneyo inkulu kune-coefficient ye-cavitation evumelekileyo, isitatimende sivumelekile kwaye i-cavitation ayiyi kwenzeka. Ukuba i-coefficient ye-cavitation evumelekileyo yi-2.5, ngoko: Ukuba δ2.5, i-cavitation ayiyi kwenzeka. Kwi-2.5δ1.5, i-cavitation encinci iyenzeka. Kwi-delta ye-1.5, ukungcangcazela kwenzeka. Ukusetyenziswa okuqhubekayo kwe-δ0.5 kuya konakalisa isivalo kunye nemibhobho esezantsi. Iimpawu ezisisiseko kunye nokusebenza kwee-valve ze-valve azibonakali xa i-cavitation isenzeka, ingabikho indawo apho umda wokusebenza ufikeleleke. Ngolu balo lungentla lucacile. Ke ngoko, i-cavitation yenzeka ngenxa yokuba xa impompo ye-rotor idlula kwicandelo lecandelo elinciphayo kwinkqubo yolwelo olukhawulezayo lokuhamba, inxalenye yolwelo ifakwe umphunga, kwaye amaqamza avelisiweyo agqabhuke kwicandelo elivulekileyo emva kwevalve, eneempawu ezintathu: (1) Ingxolo (2) i-vibration (umonakalo omkhulu kwisiseko kunye nezakhiwo ezinxulumene nayo, okubangelwa ukuphuka kokukhathala) (3) Ukonakaliswa kwezinto (ukukhukuliseka komzimba we-valve kunye nombhobho) Ukususela kubalo olungentla, akunzima ukubona loo cavitation. inxulumene kakhulu noxinzelelo lwe-H1 emva kwevalve. Ukwandisa i-H1 kuya kutshintsha ngokucacileyo imeko kunye nokuphucula indlela: A. Faka i-valve ephantsi kumgca. B. Faka ipleyiti ye-orifice kumbhobho emva kwevalve ukwandisa ukuxhathisa. C. I-valve yokuphuma ivulekile kwaye iqokelela ngokuthe ngqo i-reservoir, eyandisa indawo yokuqhuma i-bubble kunye nokunciphisa ukuguguleka kwe-cavitation. Uhlalutyo olubanzi lwemiba emine ingentla, ishwankathela ivalve yesango, iimpawu eziphambili zevalve yebhabhathane kunye noluhlu lweeparamitha ukukhetha lula. Iiparamitha ezimbini ezibalulekileyo zidlala indima ebalulekileyo ekusebenzeni kwevalve. Ivalufa impahla uxinzelelo kunye nobushushu uthelekiso itheyibhile ivalufa ishishini ngaphakathi bayazi ukuba ukhetho izixhobo ivalve kufuneka ukhethe ngokoxinzelelo lobunjineli ivelufa kunye nobushushu obusebenzayo, izinto ezahlukeneyo kuxinzelelo kunye nobushushu bume azifani, sijonge kubudlelwane bolawulo. Abangaphakathi kushishino lwevalvu bayazi ukuba ukhetho lwezixhobo zevalvu kufuneka zikhethwe ngokoxinzelelo lobunjineli kunye nobushushu obusebenzayo bevalve. Uxinzelelo kunye nobushushu obungqongileyo bezinto ezahlukeneyo azifani. Makhe sijonge ubudlelwane bokuchasana phakathi kwabo. Uxinzelelo lwezinto eziphathekayo kunye netheyibhile yokuthelekisa iValve yoxinzelelo lwezinto eziphathekayo kunye netheyibhile yokuthelekisa iqondo lobushushu Intsimbi engwevu: intsimbi engwevu ilungele amanzi, umphunga, umoya, igesi kunye neoyile kunye noxinzelelo lwegama PN≤ 1.0mpa kunye nobushushu -10℃ ~ 200℃. Amabanga aqhelekileyo entsimbi engwevu ngala: HT200, HT250, HT300, HT350. Intsimbi yokuphosa eMalleable: Ifanele uxinzelelo lwegama PN≤ 2.5mpa, ubushushu be-30 ~ 300℃ yamanzi, umphunga, umoya kunye neoli ye-oyile, iimpawu ezisetyenziswa ngokuqhelekileyo zezi: KTH300-06, KTH330-08, KTH350-10. I-Ductile iron: Ifanele amanzi, umphunga, umoya kunye ne-oyile nge-PN≤4.0MPa kunye nobushushu be -30 ~ 350℃. Iimpawu ezisetyenziswa ngokuqhelekileyo zezi: QT400-15, QT450-10, QT500-7. Ngokujonga inqanaba letekhnoloji yasekhaya yangoku, umzi-mveliso ngamnye awulingani, kwaye abasebenzisi badla ngokungabi lula ukuvavanya. Ngokutsho kwamava, kucetyiswa ukuba i-PN≤ 2.5mpa, i-valve yensimbi ikhuselekile. I-Acid resistant high silicon ductile iron: Ifanelekile kwimidiya ebolileyo kunye noxinzelelo lwe-PN≤ 0.25mpa kunye nobushushu obungaphantsi kwe-120 ℃. Intsimbi yeCarbon: Ifanele amanzi, umphunga, umoya, i-hydrogen, i-ammonia, i-nitrogen kunye neemveliso zepetroleum ezinoxinzelelo lwe-PN≤32.0MPa kunye nobushushu -30 ~ 425℃. Amabanga asetyenziswa ngokuqhelekileyo yiWC1, WCB, ZG25 kunye nentsimbi esemgangathweni 20, 25, 30 kunye ne-alloy low structural steel 16Mn. Ifanele amanzi, amanzi olwandle, ioksijini, umoya, ioli kunye nezinye imidiya kunye PN≤ 2.5mpa, kwakunye nemidiya umphunga kunye lobushushu -40 ~ 250 ℃, uphawu esetyenziswa ngokuqhelekileyo ZGnSn10Zn2 (tin bronze), H62, HPB59-1 (ubhedu), i-QAZ19-2, i-QA19-4 (i-aluminium bronze). Ukushisa okuphezulu kobhedu: Ifanelekile kwimveliso ye-steam kunye ne-petroleum kunye noxinzelelo lwe-PN≤ 17.0mpa kunye nobushushu ≤570℃. Iqhele ukusetyenziswa brand ZGCr5Mo, 1 cr5m0. ZG20CrMoV, ZG15Gr1Mo1V, 12 crmov WC6, WC9, njl. Ukukhetha okuthe ngqo kufuneka kuhambelane noxinzelelo lwevalve kunye neenkcukacha zobushushu.