Isimiso Esisebenzayo kanye Nezisekelo Ze-Tribological Ze-Plain Bearings (Ama-Sliding Bearings)

Ama-plain bearings , avame ukubizwa ngokuthi ama-EPEN sliding bearings, ayizingxenye ezibalulekile zezinhlelo eziningi zemishini. Indlela la ma-bearings asebenza ngayo ukuthi izindawo ezimbili zishelelane ngokungqubuzana okuncane kakhulu. Umqondo oyisisekelo ukubeka ungqimba oluncane lokugcotshwa phakathi kwezingxenye ezihambayo. Lokhu kuzigcina zingagugi futhi kuzivumele zisebenze kahle. Ukuqonda ukuthi ama-plain bearings asebenza kanjani kudinga ukuqonda okuhle kwezisekelo ze-tribological, ezifaka izinto ezifana nokungqubuzana, ukugcotshwa, kanye nezindlela zokuguga. Onjiniyela bangenza ama-bearings aqinile, asebenza kahle, futhi athembekile ezinhlobonhlobo zokusetshenziswa, kusukela ezinjinini zezimoto kuya emishinini yezimboni, ngokuthuthukisa lezi zingxenye.

1. Isimiso Esiyinhloko: I-Fluid Film Creation

Umgomo oyinhloko wokusebenza ukuhlukanisa izindawo ezishelelayo (i-shaft ne-bearing) ngesigcobo ukuvimbela ukuthintana okuqondile kwensimbi kuya kwensimbi. Lokhu kunciphisa kakhulu ukungqubuzana nokuguga.

Inqubo ingahlukaniswa ibe yizimiso ezintathu ezibalulekile zokusebenza:

Ukugcotshwa Komngcele (Ukuqalisa/Ukuvala):

Ngesivinini esiphansi kakhulu, ngesikhathi sokuqalisa, ukuvala shaqa, noma ngaphansi komthwalo omkhulu, i-shaft kanye ne-bearing kuthintana ngokwengxenye.

Ungqimba oluncane kakhulu lwe-lubricant (ama-molecule ambalwa kuphela awugqinsi) lunamathela endaweni yensimbi, lunikeze isivikelo esanele sokuvikela ukuguga nokubanjwa okunzima. Ukungqubuzana kuphakeme kakhulu.

Ukugcotshwa Okuxubile:

Njengoba isivinini se-shaft sikhula, sidonsa amafutha amaningi esikhaleni esiguquguqukayo phakathi kwe-shaft ne-bearing.

Umthwalo uthwalwa ngokwengxenye ukucindezela koketshezi futhi ngokwengxenye yi-asperities yendawo ethintanayo (amaphuzu aphezulu). I-friction iqala ukuncipha.

I-Hydrodynamic Lubrication (Ifilimu Egcwele - Ukusebenza Okuvamile):

Lesi isimo esifanelekile sokusebenza. Ngesivinini esanele, i-shaft ejikelezayo isebenza njengepompo, idonsela okokugcoba kwe-viscous endaweni emise okwe-wedge phakathi kwe-shaft ne-bearing.

Lesi senzo sikhiqiza ingcindezi eyanele ngaphakathi kwefilimu ewuketshezi ukuze iphakamise ngokugcwele umgodi bese iwubeka phakathi nendawo ngaphakathi kwebheri.

Izindawo zihlukaniswe ngokuphelele yifilimu encane ye-lubricant (ingaba ubukhulu obungama-micron). Akukho ukuthintana ngokomzimba , okuholela ekungqubuzaneni okuphansi kakhulu futhi cishe akukho ukuguguleka.

Isici Sokuklama Esibalulekile: Ukucaciswa kanye Ne-Wedge

I-bearing yakhelwe ububanzi obungaphakathi obukhulu kancane kunobubanzi obungaphandle be-shaft. Lokhu kudala isikhala se-radial . Ngaphezu kwalokho, i-bearing ivame ukushintshwa kancane noma i-shaft iphenduke ngaphansi komthwalo, yakha i -wedge ehlanganayo — isikhala esinciphayo ohlangothini lokunyakaza. Le wedge ibalulekile ekwakheni ingcindezi ye-hydrodynamic esekela umthwalo.

2. Izisekelo ze-Tribological

I-Tribology isayensi yezindawo ezisebenzisanayo ngokunyakaza okuhlobene, okuhlanganisa ukungqubuzana, ukuguga, nokugcotshwa. Ukusebenza kwebheringi eshelelayo kulawulwa yizimiso ze-tribological.

A) Ukungqubuzana

Ukungqubuzana ekushintsheni kwebhereyi elishelelayo ngokusebenzisa izindlela ezintathu zokugcoba:

Umngcele Nokuxubile: Ukungqubuzana kuphakeme futhi kunqunywa amandla okusika kwezingqimba zokugcoba zomngcele kanye nokuxhumana phakathi kokungabi namandla kobuso.

I-Hydrodynamic: Ukungqubuzana kungenxa nje yokushefa okuqinile kwefilimu yoketshezi. Kubalwa kusetshenziswa i-equation ye-petroffs futhi kuwumsebenzi walokhu:

I-Lubricant viscosity (μ)

Isivinini esihlobene (N)

Ubukhulu be-Bearing (D, L, c)

Ayixhomekile kumthwalo nezinto ezisetshenziswayo ebusweni, inqobo nje uma ifilimu igcinwa.

B) Gqoka

I-Wear ukulahlekelwa okuqhubekayo kwezinto ezibonakalayo. Kubhere ye-hydrodynamic esebenza kahle, ukugqokwa akunakwa ngoba akukho ukuxhumana. Nokho, ukugqoka kuba yisici esibalulekile ku:

Imijikelezo yokuqalisa/yokuvala (ukuthambisa komngcele).

Ukulayisha ngokweqile noma isivinini esinganele , okubhidliza ifilimu yoketshezi.

Ukungcoliswa yizinhlayiya ezihudulayo (isb. ukungcola, izingcezu zensimbi).

Indlala noma ukwehluleka kokugcoba .

Ukunciphisa ukuguga, izinto zokuthwala zikhethwa ngokuhambisana kwazo, ukushumeka (ikhono lokubamba ukungcola), nokumelana nokugqwala.

C) Ukuthambisa

I-lubricant iyigazi le-bearing. Izici zayo ezibalulekile yilezi:

Ukuqina (μ): Isici esibaluleke kakhulu. Ukumelana koketshezi ukugeleza. Ukuqina okuphezulu kudala ifilimu yoketshezi ejiyile futhi eqinile kodwa futhi kwandisa ukungqubuzana okunamandla kanye nokukhiqizwa kokushisa. Ukuqina okulungile ibhalansi ecophelelayo yezimo zokusebenza (isivinini, umthwalo, izinga lokushisa).

Inkomba ye-Viscosity (VI): Isilinganiso sokuthi i-viscosity ishintsha kangakanani ngokushisa. I-VI ephezulu isho ukuthi i-viscosity ihlala izinzile, okuyinto efiselekayo.

Izithasiselo: Izithambisi zesimanje ziqukethe izithasiselo ze:

I-Anti-wear (AW): Yakha izendlalelo zokuvikela ezindaweni ngesikhathi sokugcotshwa komngcele.

Ukucindezela Okukhulu (EP): Yakha amafilimu amakhemikhali avikelayo ngaphansi kwemithwalo ephezulu kakhulu kanye namazinga okushisa.

Ukuvimbela ukuminyana kwe-oxidation: Vimbela ukuthi igrisi ingaphuki emazingeni okushisa aphezulu.

Ukugqwala nokuvimbela ukugqwala.

3. Ukuthwala Izinto

Ukukhethwa kwezinto ezibonakalayo kungukuvumelana kwe-tribological. Ayikho impahla eyodwa enazo zonke izakhiwo ezifanele. Izinto ezijwayelekile zifaka:

I-Babbitt (Insimbi Emhlophe): I-alloy esuselwe kuthini noma ku-lead. Ukuhambisana okuhle kakhulu (ikhono lokuzivumelanisa nokungalungi kahle) kanye nokukwazi ukunamathela . Ukuhambisana okuhle kakhulu ukuvimbela ukuguguleka kwe-shaft. Amandla aphansi, ngakho-ke ivame ukuboshwa egobolondweni lensimbi eliqinile.

Ithusi: Ingxubevange esekelwe ethusi. Amandla amahle, ukumelana nokukhathala, kanye nokuqhuba ukushisa. Ayihambisani kahle neBabbitt. Ivame ukusetshenziswa ne-lead-tin overlay ukuze kube nezakhiwo ezingcono zobuso.

Ama-Aluminiyamu Alloys: Ukumelana okuhle nokugqwala kanye namandla okukhathala. Izindleko ezimaphakathi.

Izinto Ezinezingqimba Eziningi: Amabheringi esimanje ayizakhiwo eziyinkimbinkimbi ezinezingqimba (isb., isisekelo sensimbi samandla, ungqimba lwethusi lomthamo womthwalo, kanye ne-Babbitt overlay yezakhiwo zangaphezulu).

Ithebula Elifingqiwe: Izici Eziyinhloko Ze-Tribological

4. Ukusatshalaliswa Kwemithwalo kanye Nezindawo Zokuthwala

Ama-bearings angenalutho ahamba phambili ekusabalaliseni imithwalo ezindaweni zawo. Ukuklanywa kwalawa ma-bearings kuvumela ngisho nokusabalalisa ingcindezi, okubalulekile ekugcineni ukuzinza nokunciphisa ukuguga. Indawo ethwalayo, ngokuvamile eyenziwe ngezinto ezifana nethusi, izinhlanganisela ze-bimetal, noma ama-polymer akhiwe, idlala indima ebalulekile kule nqubo. Lezi zinto zinikeza izakhiwo eziyingqayizivele ezithuthukisa umthamo wokuthwala umthwalo futhi zinciphise ukungqubuzana.

Isibonelo, ama-bronze bushings, noma ngabe i-bronze efakwe uwoyela efakwe uwoyela noma ithusi elicijile, ahlinzeka ngezinto ezinhle kakhulu zokusabalalisa umthwalo. Isakhiwo sabo se-porous sivumela ukugcinwa kwamafutha, ukuqinisekisa ukugcoba okungaguquki ngesikhathi sokusebenza. Ama-Bimetal bushings, anesisekelo sensimbi nezinto ezithambile zolwelwesi, anikeza inhlanganisela yamandla nokungqubuzana okuphansi, okuwenza alungele izinhlelo zokusebenza ezinomthwalo omkhulu.

I-Friction and Wear Characters

Ukuqonda ukungqubuzana kanye nokuguga kubalulekile ekwenzeni ngcono ukusebenza kahle kokuthwala okucacile . Ukungqubuzana kuma-bearings acacile kuthonywa yizici ezifana nokuba lukhuni kwendawo, izakhiwo zezinto, kanye nezimo zokugcoba. Ukuguguleka, ngakolunye uhlangothi, ukususwa kancane kancane noma ukuguqulwa kwezinto ezivela ezindaweni zokuthwala.

Izinto zokuthwala ezihlukene zibonisa izici ezihlukile zokungqubuzana nezici zokugqoka. Isibonelo, izinhlanganisela ezenziwe ngethusi zivame ukunikeza ibhalansi enhle phakathi kokumelana nokugqokwa nokungqubuzana okuphansi. Ama-alloy bushings akhethekile, adizayinelwe izimo ezimbi kakhulu, angase ahlanganise izinto ezinikeza ukumelana nokugqokwa okukhethekile endaweni eshisa kakhulu noma ebolayo.

Ama-polymer bushings akhiwe ngobunjiniyela, njengalawo enziwe ngenayiloni noma amanye amapulasitiki asebenza kahle kakhulu, anganikeza ama-coefficients aphansi kakhulu wokungqubuzana nokumelana nokugqokwa okuhle, ikakhulukazi ezinsizeni lapho ama-metallic bendabuko angase athwale kanzima.

5. Ukukhethwa Kwempahla Nokuthuthukisa

Ukukhetha izinto ezifanele ze-plain bear kuyinqubo enama-nuanced ecabangela izici eziningi. Indawo yokusebenza, izimo zomthwalo, isivinini, nokutholakala kokugcoba konke kudlala indima ebalulekile ekukhetheni izinto. Imiklamo ethuthukisiwe enethafa ngokuvamile ihlanganisa izinto eziyinhlanganisela noma izakhiwo ezinezingqimba ukuze kuthuthukiswe ukusebenza kahle.

Isibonelo, ama-bimetal bushings ahlanganisa amandla okusekela kwensimbi kanye nezakhiwo ze-tribological zempahla yolwelwesi oluthambile. Lokhu kwakhiwa kuvumela umthamo ophezulu wokuthwala umthwalo ngenkathi kugcinwa ukungqubuzana okuhle kakhulu nezici zokugqoka. Impahla yolayini ingafanelana nezinhlelo zokusebenza ezithile - ulwelwesi olusekelwe kumthofu lwezimo ezingokwesiko ezinomthwalo omkhulu, noma ezinye izindlela ezingenamthofu zezinhlelo zokusebenza ezizwelayo kwimvelo.

Ama-polymer bushings amelela enye indawo yokuqamba izinto ezintsha. Amapulasitiki obunjiniyela athuthukile afana ne-PTFE, i-POM, namanayiloni asebenza kahle kakhulu anikeza inhlanganisela eyingqayizivele yokungqubuzana okuphansi, ukumelana namakhemikhali, kanye nezakhiwo zokuzithambisa. Lezi zinto zibaluleke kakhulu ezisetshenziswa lapho ukuthambisa ngokwesiko kungenzeki noma lapho ukwehlisa isisindo kubaluleke kakhulu.

Ubunjiniyela be-Surface and Coatings

Ubunjiniyela bobuso buvele njengethuluzi elinamandla ekuthuthukiseni ukusebenza kwe-plain bear. Ngokushintsha izakhiwo ezingaphezulu zama-bearings, onjiniyela bangathuthukisa kakhulu ukumelana nokugqokwa, banciphise ukungqubuzana, futhi balule impilo yokusebenza.

Amasu afana ne-nitriding, carburizing, noma ukusetshenziswa kwezimbotshana zefilimu elincanyana kungashintsha kakhulu izici ezingaphezulu zamabhering ensimbi. Isibonelo, ukunamathela kwe-chrome eqinile ku-bearing ene-steel kunganikeza ukumelana nokuguga okukhethekile nokuvikela ukugqwala.

Emkhakheni wama-polymer bearings, ukwelashwa kwendawo kungathuthukisa ukubopha ngezinto ezisekelayo noma kuthuthukise umthamo wokuthwala umthwalo. Amanye ama-polymer bearings athuthukisiwe ahlanganisa izinto zokugcoba eziqinile noma ama-nanoparticles ezingxenyeni zawo ezingaphezulu, anikeze izakhiwo ezithuthukisiwe ze-tribological.

Ukumodela Kwekhompyutha Nokulingisa

Ukufika kwamathuluzi anamandla okusebenzisa amakhompyutha kushintshe ukwakheka kwama-plain bearing . Ukuhlaziywa kwe-Finite element (FEA) kanye ne-computational fluid dynamics (CFD) kuvumela onjiniyela ukuthi balingise ukuziphatha kwama-bearing okuyinkimbinkimbi ngaphansi kwezimo zokusebenza ezahlukahlukene.

Lezi zifaniso zingabikezela izinto ezifana nokusatshalaliswa kwengcindezi, ukushuba kwefilimu, namagradient ashisayo ngaphakathi kwebheyili. Ngokuhlaziya lezi zinhlaka, abaklami bangakwazi ukuthuthukisa i-geometry ene-bearing, ukukhethwa kwezinto ezibonakalayo, namasu okugcoba ngaphambi kwe-prototyping ebonakalayo.

Izindlela zokumodela ezithuthukisiwe ziphinde zinike amandla ukucwaninga kwemiphumela enqenqemeni, ukungezwani kahle, nokuziphatha kwesikhashana okunzima ukukubona ekuhlolweni komzimba. Leli khono libaluleke kakhulu lapho uklama ama-bearings wezinhlelo zokusebenza ezibucayi noma lapho uphusha imingcele yemikhawulo yedizayini evamile.

Isibonelo, ekuthuthukiseni i-alloy bushings ekhethekile yezindawo eziyingozi kakhulu, ukumodela ngekhompyutha kungasiza ukubikezela ukuziphatha okubalulekile ngaphansi kwezimo ezingaba inselele noma ezibizayo ukuziphindaphinda ezivivinyweni zomzimba. Le ndlela isheshisa ukuthuthukiswa kwezisombululo ezintsha zobuchwepheshe obusafufusa kanye nezinhlelo zokusebenza ezinzima.

Isiphetho

Ama-bearings angenalutho, abukeka elula, empeleni ayingxube eyinkimbinkimbi yemiqondo ye-tribological. Umkhakha wobuchwepheshe be-plain bearing uhlala ushintsha, kusukela emibonweni eyisisekelo yokusabalalisa umthwalo kanye nokugcoba kuya emibonweni ethuthuke kakhulu kwisayensi yezinto ezibonakalayo kanye nokumodela kwekhompyutha. Ngokufunda kanye nokwenza ngcono lezi zimiso eziyisisekelo ze-tribological, onjiniyela bangenza ama-bearings asebenze kangcono, ahlale isikhathi eside, futhi asebenzise amandla amancane ezimweni eziningi ezihlukahlukene. Njengoba izimboni zicindezela imikhawulo yokuthi imishini ingasebenza kahle kangakanani, ama-bearings athafa aklanywe kahle abaluleke kakhulu ekuqinisekiseni ukuthi yonke into ihamba kahle futhi inokwethenjelwa.

Imibuzo Evame Ukubuzwa

Yiziphi izinhlobo eziyinhloko zama-EPEN Sliding bearings?

Izinhlobo eziyinhloko zihlanganisa i-bronze bushings (i-bronze-impregnated sintered bronze, cast bronze), i-bimetal bushings (i-steel-backed with linings ehlukahlukene), ama-polymer bushings (PTFE, POM, Nylon), kanye ne-alloy bushings ekhethekile yezimo ezimbi kakhulu.

Ama-bearings angenalutho (ama-sliding bearings) anciphisa kanjani ukungqubuzana?

Amabheringi angenalutho anciphisa ukungqubuzana ngokusebenzisa izindlela zokuthambisa ezifana ne-hydrodynamic kanye ne-border lubrication, kanye nezakhiwo ezibonakalayo ezikhuthaza ukuslayida kwe-low-friction.

Yiziphi izici okufanele zicatshangelwe lapho ukhetha i-bearing ethafeni?

Izici ezibalulekile zifaka izidingo zokulayisha, isivinini sokusebenza, izinga lokushisa, izimo zemvelo, ukutholakala kokugcoba, nezidingo ezithile zohlelo lokusebenza.

Khetha I-Plain Bearing Elungile (I-Sliding Bearing) yohlelo lwakho lokusebenza | Mayelana ne-EPEN

I-Jiashan Epen Bearing Co.Ltd. ingumkhiqizi ochwepheshe wamabheringi angenalutho kanye namapuleti okugqoka, futhi isikhule ngokushesha kwaze kwaba seqophelweni lapho manje zonke izinhlobo zama-bearings angenalutho zingahlinzekwa. Osayizi bekhathalogi abajwayelekile, osayizi abakhethekile kanye nemiklamo ingakhiqizwa ngamanani ancintisanayo kanye nezinga eliphezulu. I-Jiashan Epen Bearing Co.Ltd. Isebenza kokubili izimakethe zasekhaya nezamazwe ngamazwe. I-Jiashan Epen Bearing Company ihlose ukuhlala phambili kule makethe.

Imikhiqizo eyinhloko ekhona ye-EPEN iwuchungechunge lwensimbi oluyinhlanganisela yepulasitiki eyisilayidi, amabheringi ochungechunge lwe-bimetal, uchungechunge lwensimbi olulodwa olushelelayo, njll.

Imikhiqizo isetshenziswa kabanzi emikhakheni engaphezu kwama-30 efana nemboni yezimoto, i-metallurgy, imishini yobunjiniyela, imishini yokwakha, imishini yepulasitiki, imboni yamathuluzi omshini, ukongiwa kwamanzi kanye namandla aphehla ugesi.

Xhumana nathi ku-epen@cnepen.cn ukuze uxoxe ngezidingo zakho ezijwayelekile zokuthwala imithwalo futhi uthole ukuthi izixazululo zethu zingathuthukisa kanjani ukusebenza kwemishini yakho kanye nobude bayo.

Okubhekwayo

Johnson, KL (1985). Xhumana noMechanics. I-Cambridge University Press.

Stachowiak, GW kanye Batchelor, AW (2013). I-Tribology yobunjiniyela. Butterworth-Heinemann.

Khonsari, MM and Booser, ER (2008). I-Tribology Esetshenziswayo: Idizayini Ye-Bearing and Lubrication. UJohn Wiley & Amadodana.

Bowden, FP kanye neTabor, D. (2001). I-Friction and Lubrication of Solids. I-Oxford University Press.

UNeale, MJ (1995). I-Tribology Handbook. Butterworth-Heinemann.

U-Harnoy, A. (2002). I-Bearing Design Emishinini: I-Engineering Tribology kanye Nokugcoba. CRC Cindezela.