Isihlalo sevalvu kuphethiloli ovuthayo wangaphakathi noma injini yedizili yindawo lapho i-valve yokudonsa umoya noma i-exhaust iphumula khona phakathi nengxenye yomjikelezo wokusebenza kwenjini lapho leyo valve ivaliwe.Isihlalo se-valve siyingxenye ebalulekile yenjini ngokuthi uma sibekwe ngendlela engafanele, siqondiswa, noma sakhiwe ngendlela engafanele ngesikhathi sokwakhiwa, kuyokwenzeka ukuvuza kwe-valve okuzokhinyabeza isilinganiso sokucindezela injini kanjalo nokusebenza kahle kwenjini, ukusebenza (amandla netorque), ukukhishwa kwe-exhaust, nempilo yenjini.
Izihlalo zamavalvu zivame ukwakhiwa ngokucindezela kuqala ucezu olucishe lube yi-cylindrical lwengxube yensimbi eqinile, njenge-Stellite, lube yingcindezi ekhanda le-cylinder ngenhla kwesiqu ngasinye se-valve ekugcineni, bese kwenziwa umshini wengxenye ye-conical ku-valve. isihlalo esizohlangana nesigaba se-conical esihambisanayo sevalvu ehambisanayo.Ngokuvamile izindawo ezimbili ezinengxenye eyindilinga, enye ene-engeli yekhoni ebanzi futhi enye ene-cone-engeli encane, yenziwa ngomshini ngaphezulu nangaphansi kwendawo yokukhwelana yangempela, ukuze kwakheke indawo yokukhwelana ibe ububanzi obufanele (okuthiwa “ukunciphisa” isihlalo), kanye nokwenza ukuthi ibekwe ngendlela efanele maqondana nendawo (ebanzi) yokuhlangana kwe-valve, ukuze kuhlinzekwe ukuvaleka kahle nokudlulisa ukushisa, lapho ivalvu ivaliwe, futhi inikeze izici ezinhle zokugeleza kwegesi ngevalvu, lapho ivuliwe.
Izinjini ezingabizi zingase zibe nezihlalo zamavalvu ezivele zisikwe zibe yimpahla yekhanda le-cylinder noma ibhulokhi yenjini (kuye ngokuthi injini iklanywe kanjani).Ezinye izinjini ezintsha zinezihlalo ezifuthwa kuzo kunokuba zicindezelwe ekhanda, okuzivumela ukuba zibe mncane, zidale ukudluliswa kokushisa okuphumelelayo ngezihlalo zamavalvu, futhi zenze iziqu ze-valve zisebenze ekushiseni okuphansi, ngaleyo ndlela kuvumela i-valve. iziqu (nezinye izingxenye ze-valvetrain) zibe mncane futhi zibe lula.
Kunezindlela eziningana lapho isihlalo se-valve singase sibekwe ngendlela engafanele noma senziwe ngomshini.Lokhu kufaka phakathi izihlalo ezingaphelele ngesikhathi sesinyathelo sokulinganisa, ukuhlanekezela kwezindawo zokuhlala ezibizwa ngokuthi yi-valve eziyisiyingi ukuze zichezuke ngendlela engamukeleki ekubeni yindilinga noma ukuguquguquka okuphelele, ukutsheka kwezindawo eziwumshini ngokuhlobene ne-axis yembobo yokuqondisa i-valve, ukuchezuka kwezihlalo zesihlalo se-valve ukusuka ekugxileni. enezimbobo zokuqondisa ama-valve, kanye nokuchezuka kwengxenye ye-conical eyenziwe ngomshini yesihlalo se-valve ukusuka engeli yekhoni edingekayo ukuze ifane nendawo yevalvu.Ukulawulwa kwekhwalithi okuzenzakalelayo yezihlalo zamavalvu ezifakiwe nezifakwe ngomshini bekulokhu kube nzima kakhulu ukukufeza kwaze kwaba sekufikeni i-digital holography eye yanika amandla i-high-definition metrology yokulinganisa konke lokhu kuchezuka okusohlwini.
| Igama Lempahla | Izakhiwo Eziyinhloko | Amanothi | Izinga Lokushisa |
|---|---|---|---|
| I-VIRGIN PTFE | I-coefficient ephansi kakhulu yokungqubuzana nokumelana kwamakhemikhali okuhle kakhulu. | I-FDA igunyaziwe | -40°C kuya ku-260°C |
| I-PTFE Egcwele Ingilazi engu-15%. | Ukuncipha kwamandla acindezelayo kanye nokuwohloka okuphansi ngaphansi komthwalo kune-PTFE emsulwa. | Izinto eziqhumayo | -40°C kuya ku-260°C |
| I-PTFE Egcwele Ingilazi engu-25%. | Okufana no-15% we-Glass ukumelana kangcono nokugqoka, amandla acindezelayo aphezulu kanye nokuwohloka okuphansi ngaphansi komthwalo. | Izinto eziqhumayo | -40°C kuya ku-260°C |
| I-PTFE Egcwele Insimbi Engagqwali | Ukugqoka kanzima kakhulu.Amandla amahle kakhulu nokuzinza ngaphansi kwemithwalo enzima kanye namazinga okushisa aphakeme. | Ingasetshenziswa ekusetshenzisweni kwe-steam kanye ne-thermal fluid | -40°C kuya ku-260°C |
| I-TFM | Isakhiwo se-polymer esiminyene kakhulu kune-Virgin PTFE.Ibonisa ukutakula okungcono kwengcindezi. | I-TFE Polymer eshintshiwe | -40°C kuya ku-260°C |
| I-Carbon Graphite igcwalise i-TFM | Izinga eliphansi lokunwetshwa kwe-thermal kune-TFM evamile. | Ilungele ukusetshenziswa ekusetshenzisweni kwesitimu noketshezi olushisayo | -40°C kuya ku-260°C ngisho no-320°C ezinhlelweni ze-Thermal Fluid |
| UHMWPE | Imelana kakhulu namakhemikhali abolayo, ngaphandle kwama-oxidising acid nezinyibilikisi eziphilayo. | Eyaziwa nangokuthi i-High Modulus Polyethylene (HMPE) noma i-High Performance Polyethylene (HPPE) | -40°C kuya +80°C |
| I-PCTFE | Kuhle kakhulu ekusetshenzisweni kwe-cryogenic ne-Oxygen. | I-homo-polymer yeChlorotrifluoroethylene | -270°C kuya ku-260°C |
| I-Virgin PEEK 450G | Ukumelana namakhemikhali okuhle kakhulu kanye nezakhiwo zemishini emazingeni okushisa aphakeme. | I-organic polymer thermoplastic | -40°C kuya ku-260°C |
| I-PEEK Egcwele Ikhabhoni | Izakhiwo eziningi ezifanayo ne-Virgin PEEK.Ifaneleka ikakhulukazi amazinga okushisa aphakeme kanye nezimo zomthwalo ophezulu. | I-coefficient ephansi yokungqubuzana futhi ifanele izinhlelo zokusebenza eziningi ezonakalisa kakhulu | -40°C kuya ku-260°C |
| I-PEEK HT | Igcina zonke izici ezibalulekile nezinzuzo ze-PEEK 450G kodwa igcina izakhiwo ezingokoqobo zibe izinga lokushisa eliphezulu. | Ingahlinzekwa kukho kokubili okumsulwa okungagcwalisiwe noma njengokugcwalisiwe okuhlanganisiwe | kufika ku-260°C |
| I-Acetal ne-Delrin | Ibonisa ukumelana okuhle kokugqoka kanye nokuguqulwa ngaphansi komthwalo. | Kuhle kakhulu ekusetshenzisweni kwesihlalo se-valve | kufika ku-80°C |
| I-VESPEL | Impahla ye-polyimide enamandla okushisa aphezulu ngaphansi komthwalo futhi isetshenziselwa kakhulu izinhlelo zokusebenza zokudlulisa ukushisa, amagesi ashisayo namafutha. | Akumele isetshenziswe ne-STEAM |
Isikhathi sokuthumela: Jan-24-2019