Izidingo zokugcinwa kwesikhathi eside kanye nokuhlanganisa ama-valve
I-valve resistance coefficient ¦Æ incike kusayizi, ukwakheka kanye nokuma kwesikhala somkhiqizo wevalvu. Ingxenye ngayinye emgodini womzimba we-valve ingacatshangwa njengohlelo lwezingxenye ezikhiqiza ukumelana (ukuphenduka kwamanzi, ukwanda, izinkontileka, ukuphenduka futhi, njll.). Ngakho-ke, ukulahlekelwa kwengcindezi ku-valve cishe kulingana nesamba sokulahlekelwa kwengcindezi yengxenye ngayinye ye-valve. Kufanele kuphawulwe ukuthi ukuguqulwa kokumelana kwengxenye eyodwa ohlelweni kuzobangela ukuguqulwa noma ukusabalalisa kabusha ukumelana kulo lonke uhlelo, okungukuthi, ukugeleza okuphakathi kuthinta ngokulinganayo ingxenye ngayinye yepayipi.
Lapho uketshezi ludlula ku-valve, ukulahlekelwa kwalo ukumelana noketshezi limelelwa ukwehla komfutho we-fluid ¡÷P ngaphambi nangemuva kwevalvu.
Ngoketshezi oluyaluzayo:
Lapho ¡÷P - ukulahlekelwa kwe-valve ngaphansi kokuhlolwa (MPa)
¦Æ - i-valve yokumelana nokugeleza kwe-coefficient;
P - Ukuminyana koketshezi (kg/mm)
U - Isilinganiso sokugeleza kwesivinini soketshezi olusepayipini (mm/s)
Ukumelana noketshezi kwezingxenye ze-valve
I-valve resistance coefficient ¦Æ incike kusayizi, ukwakheka kanye nokuma kwesikhala somkhiqizo wevalvu. Ingxenye ngayinye emgodini womzimba we-valve ingacatshangwa njengohlelo lwezingxenye ezikhiqiza ukumelana (ukuphenduka kwamanzi, ukwanda, izinkontileka, ukuphenduka futhi, njll.). Ngakho-ke ukulahlekelwa kwengcindezi ku-valve cishe kulingana nesamba sokulahlekelwa kwengcindezi yengxenye ngayinye ye-valve, okungukuthi:
Kufomula, i-coefficient yokumelana yezingxenye zevalvu enezinga elifanayo lokugeleza elimaphakathi epayipini.
Kufanele kuphawulwe ukuthi ukuguqulwa kokumelana kwesici esisodwa ohlelweni kubangela ukuguqulwa noma ukwabiwa kabusha kokumelana kulo lonke uhlelo, okungukuthi, ukugeleza okuphakathi kuthinta ingxenye ngayinye yepayipi ngokulinganayo. Ukuze kuhlolwe ithonya lezingxenye ezihlukahlukene ekuphikiseni kwe-valve, idatha yokumelana yezingxenye ezithile ze-valve ezivamile ziyasetshenziswa. Le datha ibonisa ubudlelwano phakathi komumo nosayizi wezingxenye zama-valve kanye nokumelana noketshezi.
(1) Ukwanda okungazelelwe
Njengoba kuboniswe kuMfanekiso 1-12, ukwanda okungazelelwe kubangela ukulahlekelwa okukhulu kwengcindezi. Kuleli qophelo, ingxenye yesivinini soketshezi isetshenziswa ekwakhekeni kwe-eddi, ukunyakazisa uketshezi kanye nokushisisa. Ubuhlobo obuseduze phakathi kwe-coefficient yendawo yokumelana kanye nesilinganiso sendawo ye-cross-sectional A1 ngaphambi kokunwetshwa kanye ne-A2 ngemva kokunwetshwa kungavezwa ngezibalo (1-9) kanye (1-10). I-coefficient yokudonsa iboniswa kuthebula
Umfanekiso 1-12 Ukwandiswa okungazelelwe
(1-9)
(1-10)
Thayipha i-%
¦Æ — i-coefficient yokumelana nesivinini esimaphakathi epayipini elinwetshiwe;
¦Æ - Hudula i-coefficient ngesivinini esimaphakathi kushubhu ngaphambi kokunwetshwa.
Ithebula 1-32 ¦Æ amanani we-coefficient yendawo yokudonsa phakathi nokunwetshwa okungazelelwe
(2) Iyakhula kancane kancane Njengoba kuboniswe kuMfanekiso 1-13, lapho ¦È 40¡ã, i-coefficient yokumelana yeshubhu ekhula kancane kancane incane kunaleyo yeshubhu eyanda ngokuzumayo, kodwa uma ¦È=50¡ã -90 ¡ã , i-coefficient yokumelana ikhuphuka ngo-15% -20%. I-engeli yokunweba engcono kancane kancane ¦È: ishubhu eliyindilinga ¦È=5¡ã ~6¡ã30′; Ishubhu yesikwele ¦È =7¡ã~8¡ã; I-coefficient yendawo yokumelana yeshubhu elingunxande ¦È= 10¡ã -12 ¡ã ingabalwa kanje:
(1-11)
¦Æ — i-coefficient, njengoba kukhonjisiwe kuThebula 1-33;
¦Ëm - i-coefficient yokumelana nesilinganiso endleleni,
¦Ë1¦Ë2 — ama-coefficients wokuhudula ahambisana namashubhu amancane namakhulu ngokulandelanayo.
Umfanekiso 1-13 ukhula kancane kancane
Ithebula 1-33 ¦Æ amanani
(3) Ukuncipha okungazelelwe kuboniswa kuMfanekiso 1-14. I-coefficient yokumelana yendawo yokuncipha okungazelelwe iboniswa kuThebula 1-34. ¦Æ ingaphinda ibalwe ngefomula ye-empirical elandelayo:
(1-12)
Umfanekiso 1-14 sondeza
(4) Ukuncipha kancane kancane Njengoba kuboniswe kuMfanekiso 1-15, ukulahlekelwa kwengcindezi okukhiqizwa ngokuncipha kancane kancane kuncane, futhi i-coefficient yokumelana yendawo ibalwa kanje:
(1-13)
¦Î C — i-coefficient, njengoba kukhonjisiwe kuThebula 11-35;
¦Å — i-coefficient, bheka Ithebula 1-36
¦Æ amanani angatholakala ngokuqondile kuMfanekiso 1-16.
Umfanekiso 1-15 uyancipha kancane kancane
Ithebula 11-34 ¦Æ amanani ama-coefficients wendawo anciphe ngokuzumayo
Izidingo zokugcinwa kwesikhathi eside kanye nokuhlanganisa ama-valve
I-Valve iyingxenye yokulawula yesistimu yokudlulisa uketshezi, enokunqanyulwa, ukulungiswa, ukuphambukisa, ukuvimbela i-countercurrent, isilawuli sokucindezela, i-shunt noma i-overflow pressure kanye neminye imisebenzi. Amavalvu ezinhlelo zokulawula uketshezi, kusukela kumavalvu embulunga alula kakhulu kuya kumasistimu okulawula okuzenzakalelayo ayinkimbinkimbi kakhulu asetshenziswa kunhlobonhlobo yamavalvu nokucaciswa. Amavalvu angasetshenziswa ukulawula ukugeleza komoya, amanzi, isitimu, imithombo yezindaba eyonakalisayo ehlukahlukene, udaka, uwoyela, insimbi ewuketshezi kanye nemidiya ekhipha imisebe nezinye izinhlobo zoketshezi. Ngakho-ke, ekusetshenzisweni kwesikhathi eside kwenqubo ye-valve kufanele kube indlela yokulondoloza?
1. Ungasebenzisi ama-lever amade noma amasondo okukhiya lapho uvala noma uvula ivalvu.
2. Izintambo ze-stem zivame ukungqubuzana ne-stem nut, kufanele zibe ku-screw ukuze kugcinwe inani elithile lamafutha, ukugcoba, ukuqinisekisa ukunyakaza okukhululekile kwe-stem, okuguquguqukayo nokuhle. I-valve mechanical transmission, ukuya ngesikhathi ezithasiselweni ze-gearbox, ukuvimbela ukuluma.
3. Vula i-valve isikhathi eside, indawo yokuvala ingase inamathele ngokungcola; Lapho uvala, i-valve ingavalwa ngobumnene kuqala, bese ivula kancane, ukuze ukungcola kugezwe ukugeleza kwesivinini esiphezulu se-medium, bese ivala futhi.
4. Ivalvu efakwe ngaphandle kufanele ivikelwe ngomkhono ovikelayo esiqwini sevalvu ukuvikela imvula, iqhwa, uthuli nokugqwala.
5. Ivalvu kufanele ihlanzwe futhi ihlolwe njalo ukuze kugcinwe izingxenye zevalvu zihlanzekile futhi ziphelele. Ungabeki izinto ezisindayo kuvalvu futhi ungami kuvalvu.
6. Ngaphambi kokuvula i-valve ye-steam, susa amanzi ahlangene ohlelweni, bese uvula kancane kancane i-valve ukuze ugweme umthelela wamanzi e-soda; Uma i-valve isivuleke ngokugcwele, buyisela isandla emuva kancane.
7. I-valve eyisipele kufanele ibekwe endaweni eyomile endlini, futhi isixhumi esibonakalayo kufanele sivalwe ngebhodi lephepha le-wax noma ipulaki ukuze kugwenywe ukungena kokungcola.
Izidingo zokuhlanganisa ama-valve
Izingxenye ezihlanziwe kufanele zivalwe ukuze zifakwe. Izidingo zenqubo yokufaka zimi kanje:
1. Indawo yokusebenzela yokufaka kufanele ihlanzeke, noma imise izindawo ezihlanzekile zesikhashana, njengendwangu esanda kuthengwa yombala noma ifilimu yepulasitiki, ukuvimbela uthuli ukuthi lungangeni ngesikhathi sokufakwa.
I-2, izisebenzi zomhlangano kumele zigqoke izingubo zokusebenza zikakotini ezihlanzekile, zigqoke isigqoko sikakotini esihlanzekile, izinwele azikwazi ukuvuza, izinyawo zigqoke izicathulo ezihlanzekile, izandla zigqoke amagilavu epulasitiki, ukugcoba,.
3. Amathuluzi omhlangano kufanele asuswe amafutha futhi ahlanzwe ngaphambi kokuhlanganiswa ukuze kuqinisekiswe ukuhlanzeka.
Isikhathi sokuthumela: Jun-30-2022
