I-alloy bushings ixazulula izinkinga zomhlaba wangempela zokugqokwa nokungahambi kahle-uma zenziwe kahle. Sibone ukuhlanganiswa kwephampu ye-hydraulic kungasebenzi ngemuva kwamahora okusebenza angu-4,200 ngenxa yokuthi izihlahla zethusi ezijwayelekile zikhubazekile ngaphansi komthwalo we-cyclic radial. Sishintshe imikhono ye-cast-iron ephukile emikhondweni ye-winch centre ngokwezifiso i-alloy bushing ukufakwa—kanye nokuphila kwesevisi okunwetshiwe ngo-3.7×. Lokhu akulona ithiyori. I-metallurgy efakazelwe ensimini isetshenziswa ku-geometry esebenzayo.
Kungani Izihlahla Ezijwayelekile Zehluleka Ngaphansi Kwemithwalo Yezimboni
Ukwehluleka okuningi kubuyela emuva ekucabangeni okuthathu okungahambisani: lowo mthwalo umile, izinga lokushisa lihlala lingashintshi, futhi ukuthintana kwendawo kuhlala kufana. Eqinisweni, izindlu zesilinda sephampu ye-piston zibona ukukhuphuka komfutho ngaphezu kwamabha angama-450 kuyilapho izinga lokushisa likawoyela lishintsha ukusuka ku-35°C ukuya ku-110°C phakathi nemijikelezo yomsebenzi. Lelo gebe lokunwebeka okushisayo? Yilapho ukungaboni ngaso linye kuqala khona. Izihlahla zethusi zithambisa cishe ku-150°C. I-steel-on-steel ixhumanisa inyongo ngaphandle kwama-coefficients wokungqubuzana okulawulwayo. Futhi i-cast iron ayinakho ukuzinza kwe-microstructural edingekayo ekubekezeleni kokuphuma kwe-sub-0.015 mm kuma-asembly ajikelezayo anesivinini esikhulu.
Silandelele ukwehluleka kwenkambu engama-68 kuwo wonke amasistimu okusebenzisa amanzi emoto yobunjiniyela phakathi nezinyanga eziyi-18. Ama-73% abandakanya ukushaya amagoli ngaphambi kwesikhathi kumajenali e-shaft—okungabangelwanga ukungcoliswa, kodwa ukuqhuma kwehlathi ngaphansi kwengcindezi eqhubekayo ye-MPa eyi-120. Imbangela yayingekona ukungcola. Kwakuyisivuno sezinto ezibonakalayo.
I-alloy Bushing Materials: Ukufanisa Ikhemistri nomsebenzi
Akuwona wonke ama-alloy bushings enza ngokulinganayo. Ama-alloys e-cobalt-nickel afana ne-AMS 5387 aletha ubulukhuni obungaphezu kuka-45 HRC ngokunwebeka okushisayo okuseduze noziro ngaphansi kuka-500°C. Amabanga e-T800 asekelwe ku-cobalt agcina amandla okucindezela angaphezu kuka-1,100 MPa ku-600°C—okubalulekile kumabhomu epompo aphuma emgodini achayeke kugesi omuncu nesihlabathi esihubhukayo. Insimbi ene-chromium engu-3.2% kanye ne-molybdenum engu-1.8% imelana ne-galling kangcono kune-iron empunga engenalutho—kodwa kuphela lapho ifakwe ukushisa ibe ngu-28–32 HRC futhi ifika ku-Ra ≤0.4 μm.
Nakhu okusebenzayo-futhi kungani:
- I-Cobalt-nickel (AMS 5387): Ilungele imithwalo enyakazayo >100 kN namazinga okushisa >400°C. Igcina ukuqina kohlangothi ngaphakathi ±0.002 mm ngaphezu kwemijikelezo engu-10,000.
- T800 ingxubevange ye-cobalt: Ilungele ukuxhumana okungagcotshisiwe noma okungagcotshisiwe kancane. I-coefficient of friction ihlala ngaphansi kuka-0.28 ngisho nangemva kwamahora angu-500 ukusebenza okomile.
- I-Chromium-molybdenum cast iron: Ingabizi kakhulu kumavalvu okucindezela okumaphakathi lapho isivinini esiphezulu sihlala ngaphansi kuka-1.2 m/s futhi izinga lokushisa le-ambient lihlala ngaphansi kuka-120°C.
Usebenzisa i-cobalt alloy endlini yegiya elinomthwalo ophansi? Overkill-futhi kuyabiza. Usebenzisa i-cast iron kusisekelo sepompo elingasogwini? Ukukhokha okuqinisekisiwe phakathi nezinyanga eziyi-18. Ukukhetha okubalulekile akumayelana nemininingwane. Imayelana nezimo zemingcele.
Idizayini Nokukhiqiza: Lapho Ukunemba Kuba Ukusebenza
I-alloy chemistry ephelele ayisho lutho ngaphandle kwejometri eqondile. Sisebenza ngomshini i-cobalt alloy bushings ezikhungweni ze-CNC ze-5-axis ezinamabhore angaphakathi aphendulwe yidayimane—ukuthola ukuzungeza okungu-≤0.003 mm nokuqeda phezulu kuka-Ra 0.2 μm. Kungani lokho kubalulekile? Ngoba isimo esingaphandle kwe-0.008 mm sinyusa ingcindezi yokuxhumana yendawo ngo-47% endaweni ephezulu. Yilapho ama-microcracks enza khona.
Inqubo yethu ihlanganisa ukulingisa nokwenza imishini ngamabomu. Ukuze uthole izindlu zesilinda sephampu ye-piston, siphonsa igobolondo langaphandle nge-ductile iron (ASTM A), bese sicindezela- sifake umugqa womshini we-cobalt alloy. Ukulingana kokuphazamiseka kucindezela i-liner ngokukhulu ukushesha—ukudala ukulayisha okwakhelwe ngaphakathi okubala izingcindezi zokusebenza. Akukho okunamathelayo. Awekho ama-shrink alingana. I-synergy ye-metallurgical nje.
Iqoqo ngalinye likwazi ukulandeleka ngokugcwele: izitifiketi zezinto ezingavuthiwe, amalogi okuphatha ukushisa, imibiko ye-CMM nge-ASME Y14.5 ngayinye, nokuhlolwa kokugcina kokusebenza ngengcindezi elinganiselwe nesivinini. Uma i-bushing izungeza ku-1,800 rpm ngaphakathi kwe-winch center shaft, siyayiphenya ngo-2,200 rpm imizuzu engu-30 ngaphambi kokuthunyelwa.
Nini Ukucacisa I-Alloy Bushing-Futhi Uma Kungafanele
Khetha i-alloy bushings uma noma yikuphi kwalokhu kusebenza:
- Ukuchezuka ku-shaft kudlula u-0.025 mm ngaphansi komthwalo omkhulu
- Izinga lokushisa elisebenzayo liyashintshashintsha ngaphezu kuka-60°C phakathi nomjikelezo ovamile womsebenzi
- Isivinini sobuso singaphezu kuka-1.5 m/s ngokugcotshwa kwezikhawu
- Ingxenye idinga isitifiketi se-ASME B16.34 noma i-API 6A
Ungazicacisi kuzinhlelo zokusebenza ezimile, ezinomthwalo ophansi njengama-pivots ephaneli yezinsimbi noma izibambi zamavalvu ezenziwa ngesandla. Namathela ngethusi le-phosphor lapho. Londoloza ukusebenza kwe-alloy lapho kubaluleke khona: amavalvu okucindezela ahamba ngebhayisikili izikhathi ezingu-12 ngomzuzu, izisekelo zephampu ezisekela uquqaba olujikelezayo lwamathani angu-8, noma amawintshi asogwini abekezelela ukugqwala kwesifutho sikasawoti kanye nokulayishwa kokushaqeka.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yakha lezi zingxenye-hhayi njengezinto zekhathalogi, kodwa njengezixhumanisi ezibucayi zesistimu. Siqinisekisa ama-callouts e-GD&T ngaphambi kokusika insimbi. Simaka ama-engeli asalungiswa abamba umoya ngesikhathi sokusakaza. Sihlola zonke i-alloy bushing ngokumelene nezinto zakho zangempela ze-shaft-hhayi insimbi evamile.
Ukugqoka nokuhleleka ngendlela engafanele akunakugwenywa. Ziyizimpawu zezinto ezingafani, ukubekezelelana okunganakwa, noma ukuxhumana okungagunyaziwe. Zixazulule emthonjeni—hhayi ngamashejuli okunakekela, kodwa ngezixazululo ezinobunjiniyela obunembayo. Yileyo ndlela osuka ngayo ekushintsheni okusebenzayo uye ekusebenzeni okungabikezelwa.
