Intshayelelo
Ukukhetha i-ball bearing kukutshintshana phakathi komthwalo ekufuneka iwuthwale, ukuba kufuneka ijikeleze ngesantya esingakanani, kunye nokuba kufuneka ihlale ixesha elingakanani ngaphambi kokuba ukudinwa kube ngumngcipheko. Ukukhetha isandi kuqala ngeprofayili yokusebenza yokwenyani: imithwalo ye-radial kunye ne-axial, umjikelo womsebenzi, uluhlu lwesantya, ubushushu, ukuthambisa, kunye nokuvezwa kongcoliseko. Ukusuka apho, amanqaku aphambili afana nomthamo womthwalo oguqukayo, umthwalo olinganayo, kunye nobomi be-L10 obubaliweyo kunceda ekuchazeni ukuba i-bearing iya kuhlangabezana na neenjongo zokuthembeka ngaphandle kokuba ibe nkulu kakhulu. Esi sikhokelo sichaza izinto eziphambili zokukhetha, sibonisa indlela imida yomthwalo kunye nesantya esebenzisana ngayo, kwaye sikulungiselele ukuvavanya ubomi benkonzo ngeengcamango ezimbalwa zoyilo.
Kutheni Ukukhethwa Kweebhere Zebhola Kumisela Umthamo Womthwalo kunye Nemida Yesantya
Inkcazo yebhereyitha yebhola imisela imida yokusebenza esisiseko yezixhobo ezijikelezayo. Iinjineli kufuneka zilinganisele umthamo womthwalo, ochaza amandla aphezulu ibhereyitha enokumelana nawo ngaphandle kokuguquka okusisigxina, ngokuchasene nemida yesantya, echaza isantya esiphezulu sokujikeleza ngaphambi kokuba kwenzeke ukuphazamiseka kobushushu. Ukukhetha okufanelekileyo kuqinisekisa ukuba inkqubo yoomatshini ifezekisa ixesha layo eliphakathi phakathi kokusilela (MTBF) ngelixa ithintela ubunjineli obugqithisileyo obunyusa ngokungeyomfuneko iindleko zokuvelisa.
Indlela yokukhetha iiBearing kwiSakhelo
Ukumisela isiseko seukukhetha iibherethi zebholaifuna ukubala ubomi benkonzo ye-L10, echazwe ngumgangatho we-ISO 281 njengenani leenguqu eziza kugqitywa okanye zidlule kwi-90% yeqela elithile leebheringi ezifanayo ngaphambi kokuba kuvele ubungqina bokuqala bokudinwa kwesinyithi. I-equation esisiseko, i-L10 = (C/P)³ × iinguqu eziyi-1,000,000, ixhomekeke kumlinganiselo wesiseko womthwalo oguqukayo (C) kunye nomthwalo we-dynamic bearing oguqukayo (P). Ukuze uqhubeke.izicelo zoshishino, iinjineli zihlala zijolise kubomi be-L10 obuyiiyure ezingama-20,000 ukuya kuma-40,000, ngelixa imijikelo yomsebenzi oqhubekayo ingadinga iiyure ezingama-4,000 ukuya kuma-8,000 kuphela. Ukuchonga umthwalo ngokuchanekileyo—ukwahlula amandla e-radial kunye ne-axial—kubaluleke kakhulu ekumiseleni ixabiso le-P elichanekileyo.
Zeziphi Iimeko Zokusebenza Ezibangela Ukusilela Kwangethuba
Ukuphambuka kwiimeko zokusebenza ezithile kukhawulezisa ngokukhawuleza ukuwohloka kweebheringi. Idatha yeshishini ibonisa ukuba malunga nama-54% okusilela kweebheringi zebhola ngaphambi kwexesha kuvela ekuthambiseni okungafanelekanga, nokuba kukutya kakhulu, ukuthambisa kakhulu, okanye amanqanaba e-viscosity angachanekanga. I-16% eyongezelelweyo yokusilela ibangelwa ziindlela ezingafanelekanga zokufakela, ezifana nokuphazamiseka okugqithisileyo okususa ukususwa kwangaphakathi. Xa ibheringi isebenza ngaphaya kokulingana kwayo kobushushu—idla ngokudlula ama-80°C (176°F) kwigrisi eqhelekileyo—ubude befilimu yokuthambisa buyehla ngaphantsi koburhabaxa bomphezulu wendlela yokugijima, nto leyo ekhokelela ekunxibelelaneni kwesinyithi nesinyithi, ukusasazeka kancinci, kunye nokubaleka kobushushu obubi ngaphakathi kweeyure ezimbalwa. Ukubeka iliso ekungcangcazelweni kunokulandelela oku kuwohloka, kunye nokufundwa kwesantya se-RMS esidlula i-0.15 in/s ngokuqhelekileyo kubonisa ukuqala kokuwohloka okukhulu koomatshini.
Zeziphi iinkcukacha zokuthwala ibhola ezibaluleke kakhulu
Ukuvavanya iinkcukacha zebhereyitha yebhola kufuna uhlalutyo olucokisekileyo lwezilinganiso eziguquguqukayo nezizinzileyo, ijiyometri yangaphakathi, kunye nemida yezinto eziphathekayo. Ezi parameters zakha isiseko sedatha yebhereyitha kwaye ziyalela indlela eza kusabela ngayo kwiimeko zoxinzelelo oluntsonkothileyo ngexesha lokusebenza.
Indlela Uvavanyo Lomthwalo Oguquguqukayo Nongaguqukiyo Oluchaphazela Ngayo Ukukhetha
Umlinganiselo osisiseko womthwalo oguqukayo (C) umele umthwalo oqhubekayo apho ibhereyitha iya kufikelela kubomi be-L10 besigidi esinye sokujikeleza. Ngokwahlukileyo koko, umlinganiselo osisiseko womthwalo oshukumayo (C0) ngumthwalo ophezulu osetyenziswayo okhokelela ekuguqukeni kweplastiki okusisigxina kwento eqengqelekayo kunye nendawo yokunxibelelana yendlela yokukhwela elingana ne-0.0001 amaxesha ububanzi bento eqengqelekayo. Ukudlula umda we-C0, nokuba kwangoko ngexesha lomthwalo oshukumayo, kubangela ukuxinana—ukuxinana kwindlela yokukhwela okuvelisa ukungcangcazela okukhulu kunye nengxolo ngexesha lokujikeleza okulandelayo. Kwizicelo eziphantsi kokungcangcazela okukhulu okanye impembelelo, iinjineli kufuneka zisebenzise i-static safety factor (s0 = C0/P0), zigcine ngokungqongqo i-s0 > 1.5 kwiibhokisi zegiya eziqhelekileyo zoshishino kunye ne-s0 > 3.0 kwizicelo ezishukumayo kakhulu njengee-crushers zoshishino.
Indlela isantya, ukuthambisa, ukucoca, kunye nokulayisha kwangaphambili okunefuthe ngayo ekusebenzeni
Amandla esantya sokujikeleza achazwa kakhulu yi-Ndm factor (ububanzi obuphakathi bokuthwala kwiimilimitha buphindaphindwe ngesantya kwi-RPM).iibheringi zebholaUkusebenzisa i-grisi lubrication kudla ngokuxhasa amaxabiso e-Ndm ukuya kuthi ga kwi-500,000. Ukutshintshela kwi-oyile-umoya okanye i-oyile-mist lubrication kunokunyusa lo mda udlule kwi-1,500,000 Ndm, nangona ngexabiso elikhulu lenkqubo. Ngaphezu koko, i-internal clearance—ehlelwe ukusuka kwi-C2 (tight) ukuya kwi-C5 (ekhululekileyo)—kufuneka ihambelane namaqondo obushushu okusebenza. I-CN clearance eqhelekileyo inokwanela imisebenzi yobushushu begumbi, kodwa i-C3 okanye i-C4 clearance iyimfuneko xa i-inner ring isebenza kumaqondo obushushu aphezulu kakhulu kune-outer ring, ihlawulela ukwanda kobushushu obuhlukeneyo. Ukulayisha kwangaphambili, okufezekiswa ngee-springs okanye ii-locknuts eziqinileyo, kusetyenziselwa ukususa i-radial play ngokupheleleyo, kwandisa ukuqina kwenkqubo kodwa ngaxeshanye kuphakamisa ukungqubana kunye nokuveliswa kobushushu.
Indlela Iintlobo Zeebhere Zithelekiswa Ngayo Kwizicelo Ezahlukeneyo
Ukukhetha ijometri echanekileyo kuxhomekeke ngokupheleleyo kwicala kunye nobukhulu bamandla asetyenzisiweyo.
| Uhlobo lokuthwala | Isikhokelo soMthwalo oPhambili | Umda wesantya oqhelekileyo (Ndm) | Ukunyamezelana Okungalunganga |
|---|---|---|---|
| Umjelo onzulu | I-Radial (i-axial ephakathi) | ~500,000 (Igrisi) | < 0.25° |
| Uqhagamshelwano lwe-Angular | I-Axial kunye ne-Radial ezibhekiselele kwelinye icala | ~700,000 (Igrisi) | < 0.06° |
| Ukuzilungelelanisa | I-Radial (i-axial ekhanyayo) | ~400,000 (Igrisi) | Ukuya kuthi ga kwi-3.0° |
Iibheringi zebhola ezinzulu zihlala ziyindlela eqhelekileyo yokusebenza ngesantya esiphezulu apho imithwalo yeradial ilawula khona. Iibheringi ze-angular contact, ezinee-engile zoqhagamshelwano eziqhelekileyo ukusuka kwi-15° ukuya kwi-40°, zifakwa ngababini ukuze ziphathe imithwalo ephezulu ye-axial kwaye zibonelele ngokuqina kwexesha, okubalulekileyo kwiispindles zesixhobo somatshini. Iindidi ezizilungelelanisayo zinendlela yangaphandle yesangqa, zinciphisa amandla omthwalo opheleleyo ukuze zilungele ukuphambuka kweshaft ukuya kuthi ga kwi-3 degrees ngaphandle kokufaka umthwalo we-edge kwi-rolling elements.
Indlela yokuHlanganisa iBall Bearing kunye neSicelo soMsebenzi
Ukuguqulela iinkcukacha zethiyori zibe yi-functional mechanical design kufuna uphononongo olupheleleyo lomjikelo womsebenzi wesicelo. Iinjineli kufuneka zenze iiprofayili zomthwalo, iimeko ezigqithisileyo zokusingqongileyo, kunye nemida yebhajethi ukuze kuchazwe i-bearings enikezela ukuthembeka okuphezulu.
Zeziphi iiNgeniso zeSicelo ekufuneka ziqokelelwe kuqala
Inkqubo yokuchazwa iqala ngengqokelela epheleleyo yezinto ezifakwayo ngoomatshini: ububanzi be-shaft, imida yezindlu, isantya esiphezulu sokujikeleza, kunye ne-spectrum yomthwalo womjikelo womsebenzi. Iinjineli kufuneka zibale umthwalo olinganayo we-dynamic bearing bearing besebenzisa ifomula P = X(Fr) + Y(Fa), apho i-Fr kunye ne-Fa ziyimithwalo ye-radial kunye ne-axial, kwaye i-X kunye ne-Y zizinto ezithile zejometri. Ukuba isicelo siquka imithwalo eguquguqukayo, umthwalo we-cubic mean kufuneka ubalwe ukuze ubonise ngokuchanekileyo uxinzelelo oluguquguqukayo kwiindlela zomdyarho. Ukongeza, iinjineli kufuneka zichaze i-reliability factor efunekayo. Ngelixa ubomi be-L10 buthatha ukuthembeka kwe-90%, izicelo ezibalulekileyo ze-mission zinokufuna ubomi be-L1 (ukuthembeka kwe-99%), esebenzisa i-a1 modifier ye-0.21, enciphisa ngempumelelo ubomi benkonzo ebaliweyo phantse nge-80%.
Indlela Okusingqongileyo kunye nobushushu obuchaphazela ngayo ukukhethwa
Izinto eziguquguqukayo kwindalo zilawula ukwakheka kwezinto kunye nokulungiswa kokutywinwa kwebheriya. Intsimbi ethwala i-SAE 52100 eqhelekileyo itshintsha ngokwesinyithi kunye nokungazinzi kobukhulu xa ivezwa kumaqondo obushushu aqhubekayo adlula i-120°C (250°F). Kwiindawo ezinobushushu obuphezulu, abachazi-magama kufuneka bagunyazise iiringi ezizinziswe bubushushu (ezibizwa ngokuba yi-S0 ukuya kwi-S4), ezinokumelana ukuya kuthi ga kwi-350°C (660°F) kodwa zinciphise umthamo womthwalo oguqukayo ngama-20% ukuya kuma-40%. Ulawulo longcoliseko lubaluleke ngokulinganayo; ukungena kwezinto ezincinci njengee-microns ezi-5 kunokuvala ifilimu yokuthambisa ye-elastohydrodynamic. Ngenxa yoko, iinjineli kufuneka zikhethe ubuchwepheshe bokutywina obufanelekileyo, zikhethe phakathi kwezihlangu zesinyithi ezingaqhagamshelaniyo (ZZ) kwiimfuno zesantya esiphezulu, eziphantsi kokungqubana, okanye izitywino zoqhagamshelwano ezinzima (2RS) ezinokukwazi ukukhupha uthuli olunzima kunye nokufuma ngexabiso lokunciphisa isantya esiphezulu nge-15%.
Yintoni Inkqubo Yokukhetha Elinganisa Ukusebenza kunye Neendleko
Ukulinganisela ukusebenza okuphezulu xa kuthelekiswa nohlahlo-lwabiwo mali lokuthenga kufuna ukuvavanya iindleko zizonke zobunini endaweni yexabiso lokuqala lokuthenga. Umzekelo, ukutshintsha iibheringi zebhola zentsimbi ezisemgangathweni ngeenguqulelo ze-ceramic hybrid (iibhola ze-silicon nitride ezineendandatho zentsimbi) kunokunyusa ixabiso lokuqala leyunithi nge-3 ukuya kwi-5. Nangona kunjalo, ngenxa yokuba iibhola ze-ceramic zikhaphukhaphu ngama-60% kwaye zivelisa amandla aphantsi kakhulu e-centrifugal, zinokwandisa ubomi be-lubricant ukuya kuthi ga kwi-40% kwizicelo zesantya esiphezulu, ezifana neemoto zombane ezithwala iimoto ezisebenza kwi-18,000 RPM. Ukuba iindleko zewaranti yenkqubo yoomatshini okanye izohlwayo zexesha lokungasebenzi zidlula i-$10,000 ngeyure, iprimiyamu yezixhobo eziphambili, ii-coating ezikhethekileyo, okanye ukunyamezelana okuchanekileyo kakhulu kuyathetheleleka ngokukhawuleza.
Zeziphi Izinto Ezibalulekileyo Ngomgangatho, Umthombo, kunye Nokuthobela Imithetho
Ukuthengwa kwee-ball bearings kudlulela ngaphaya kweenkcukacha zobukhulu; kufuna uvavanyo olungqongqo lomgangatho wokwenziwa, ukuthembeka kwe-metallurgical, kunye nokuthembeka kwababoneleli. Imarike yee-bearings zehlabathi inamanqanaba amaninzi ezakhono, ezifuna ubuchule obuqinileyo.isiqinisekiso somthengisiukuthintela ukusilela okukhulu kwenkqubo.
Indlela yokuthelekisa umgangatho wezinto, unyango lobushushu, kunye nokuchaneka
Ukuchaneka kobukhulu kunye nokuchaneka kokusebenza kulawulwa ziiklasi zokunyamezelana zamazwe ngamazwe, ikakhulu isikali se-ABEC (iKomiti yoBunjineli be-Annular Bearing) okanye umgangatho ofanayo we-ISO 492. Iimoto zombane eziqhelekileyo zoshishino zihlala zisebenzisa iibheringi ze-ABEC 1 okanye ze-ABEC 3 (ISO P0 okanye P6). Nangona kunjalo, izixhobo zomatshini wokuchaneka zifuna amanqanaba e-ABEC 7 okanye e-ABEC 9 (ISO P4 okanye P2). Umzekelo, ibheringi ye-ABEC 7 ifuna i-inner ring radial runout engaphantsi kwe-0.0001 intshi (2.5 micrometers), ukuqinisekisa ukungcangcazela okuncinci kwisantya esiphezulu. Ngaphaya kokunyamezelana kobukhulu, umgangatho we-metallurgical ubaluleke kakhulu. Iibheringi kufuneka zenziwe ngentsimbi ekhutshwe nge-vacuum ukuze kuncitshiswe izinto ezingezizo zesinyithi. Inkqubo yonyango lobushushu be-martensitic kufuneka ivelise ubunzima obufanayo be-58 ukuya kwi-62 HRC, ukuqinisekisa ukumelana nokudinwa okuphezulu.
Yeyiphi iMigangatho kunye neeMpawu eziBalulekileyo
Ukuthobela imigangatho yokuvelisa neyendalo yamazwe ngamazwe kusebenza njengesiseko sokufaneleka komthengisi.I-ISO 9001:2015isiqinisekiso sezicelo zemizi-mveliso ngokubanzi, ngelixa izinto zeenqwelo-moya zifuna ukuqinisekiswa kwe-AS9100. Ngaphezu koko, iinjineli kufuneka zicele iiNgxelo zoVavanyo lweMpahla (ii-MTR) ukuqinisekisa ukwakheka kweekhemikhali kunye neerekhodi zebhetshi yonyango lobushushu bentsimbi. Kwimixokelelwane yokubonelela ngeenkonzo zehlabathi, ukuthotyelwa kweRoHS (Umda weZinto eziyingozi) kunye nemiyalelo yeREACH kuyimfuneko, ngakumbi malunga nokwakheka kweekhemikhali zeeoyile zokuthintela umhlwa, izinto zekheji, kunye neegrisi zokwenziwa ezisetyenziswa kwindibano yokugqibela yebheyari.
Indlela Ababoneleli Abathelekisa Ngayo
Indawo yokuthenga izinto yahlulwe yangamanqanaba ahlukeneyo ababoneleli, ngalinye linikezela ngeenkcukacha ezahlukeneyo zexabiso, umgangatho, kunye nothutho.
| Umgangatho woMboneleli | Izinga Eliqhelekileyo Lesiphako | Ubungakanani be-oda obuncinci (MOQ) | Ixesha Eliqhelekileyo Lokukhokela | Ingqwalasela ephambili yesicelo |
|---|---|---|---|---|
| Inqanaba 1 (iPremium Global) | < 10 PPM | Ephantsi (iiyunithi ezili-1-10) | Iiveki ezi-2-4 (Zigciniwe) | Inqwelo-moya, Ezonyango, Ukuchaneka Okuphezulu |
| Inqanaba lesi-2 (Imarike ephakathi) | 50 – 100 PPM | Phakathi (iiyunithi ezingama-500) | Iiveki ezi-8-12 | Imizi-mveliso Jikelele, iiMoto |
| Inqanaba lesi-3 (Uqoqosho) | > 500 PPM | Phezulu (iiyunithi ezingaphezu kwe-5,000) | Iiveki ezili-16-24 | Iimpahla zabathengi ezingabizi kakhulu, Izinto zokudlala |
Abavelisi beTier 1 batyala imali eninzi kwiijiyometri zangaphakathi ezizimeleyo, iindlela zokuphucula eziphucukileyo, kunye neziphene ezingenazoulawulo lwemeko, ephethe iprimiyamu yexabiso eliphakathi kwama-40% ukuya kwi-100%. Ababoneleli beTier 2 banikezela ngexabiso elilinganayo kwiimoto zombane ze-NEMA kunye neebhokisi zegiya, ukuba nje baphononongwa ngokungqongqo kolawulo lomgangatho. Ukuthembela kubaboneleli beTier 3 kwimishini ebalulekileyo yemizi-mveliso kudla ngokuphumela kuqoqosho olungelulo, apho ukonga kokuqala kweeyunithi ezingama-20% ukuya kuma-30% kupheliswa ngamabango aphezulu ewaranti kunye nokusilela kwangaphambi kwexesha.
Yeyiphi iSakhelo seSigqibo esiSebenza kakuhle kuKhetho lokugqibela
Ukukhetha ibherethi yokugqibela kufuna isakhelo sokwenza izigqibo esicwangcisiweyo esitshintsha ukusuka kwiimodeli zobunjineli bethiyori ukuya kwizigaba zokuthenga ezisebenzayo kunye nokuqinisekisa. Oku kuqinisekisa ukuba icandelo elikhethiweyo liyahlangabezana nemiyalelo yobugcisa kunye neyezorhwebo.
Indlela yokuGqibezela iinkcukacha kunye nokukhethwa kwababoneleli
Ukugqiba iinkcukacha kubandakanya ukutshixa amagama apheleleyo eebheriya, achaza ubungakanani bebhore, uthotho, izinto zekheji, ukususwa kwangaphakathi, ulungiselelo lokutywina, kunye nesantya sokuzalisa i-lubricant (ngesiqhelo yi-25% ukuya kwi-35% yendawo yangaphakathi ekhululekileyo). Nje ukuba iinkcukacha ziqandisiwe, iinjineli kufuneka zenze uvavanyo lokuqinisekiswa kweprototype. Iprototype esemgangathweni ibandakanya uvavanyo lobomi olukhawulezileyo lweeyure ezingama-500 phantsi komthwalo oqhubekayo ophezulu kunye nobushushu obuphezulu bokusebenza, kulandele uhlalutyo lokuchithwa ukuze kuhlolwe iindlela zomdyarho ukuze kubonwe iimpawu zokuqala zokuqhekeka kwe-micro-spalling okanye ukuwohloka kwe-lubricant. Kwangaxeshanye, amaqela okuthenga kufuneka ahlole iTotal Cost of Ownership (TCO), aqwalasele ixabiso leyunithi, izinto zokuhambisa, iindleko zokubamba izinto, kunye ne-MTBF eqikelelweyo. Kuphela xa zombini iprototype ebonakalayo idlula ukuqinisekiswa okukhawulezileyo kwaye umthengisi ehlangabezana nemida ye-TCO kunye nezinga lesiphene (njengokunamathela ngokungqongqo kwi-<50 PPM defect limits) apho i-beriya kufuneka ivunywe kwimveliso epheleleyo ye-serial.
Izinto ezibalulekileyo ekufuneka ziqwalaselwe
- Izigqibo ezibaluleke kakhulu kunye nesizathu sokuthwala ibhola
- Iinkcukacha, ukuthobela imithetho, kunye nokuhlolwa komngcipheko okufuneka kuqinisekiswe ngaphambi kokuba uzibophelele
- Amanyathelo alandelayo asebenzayo kunye nezilumkiso abafundi abanokuzisebenzisa ngoko nangoko
Imibuzo ebuzwa qho
Ndingakhetha njani phakathi kwee-deep groove kunye nee-angular contact ball bearings?
Sebenzisa iibheringi ezinzulu zegroove kwimithwalo yeradial enomthwalo ophakathi we-axial kunye nesantya esiphezulu. Khetha iibheringi zoqhagamshelwano ze-angular xa umthwalo we-axial ubalulekile okanye imithwalo edibeneyo ifuna ukuqina okuphezulu.
Ngowuphi umsebenzi endifanele ndiwujolise kwi-industrial ball bearing?
Kwimisebenzi yemizi-mveliso eqhubekayo, jolise kwiiyure zokusebenza ezimalunga nama-20,000–40,000. Kwizixhobo eziphuma ngexesha elinye, iiyure ezingama-4,000–8,000 zinokwanela ukuba umthwalo kunye nesantya zilawulwa kakuhle.
Ndingayikhetha nini i-C3 clearance endaweni ye-CN?
Khetha i-C3 xa iringi yangaphakathi ishushu ngakumbi kuneringi yangaphandle, njengeemoto okanye iiyunithi ezinesantya esiphezulu. I-CN idla ngokufaneleka kwiimfuno zobushushu obuqhelekileyo, ezisemgangathweni.
Ndingakuphepha njani ukungaphumeleli kwebhereyitha yebhola ngaphambi kwexesha?
Sebenzisa i-lubricant kunye ne-viscosity efanelekileyo, kuphephe ukuthambisa kakhulu, faka ngendlela efanelekileyo, kwaye ugcine ubushushu bokusebenza bungaphantsi kwemida eqhelekileyo ye-grisi. Jonga ukungcangcazela kwangethuba ukuba ingxolo okanye ubushushu buyaphakama.
Ngaba ii-DEMY Bearings zinokunceda ekukhetheni ii-OEM okanye ii-bulk ball bearing?
Ewe. I-DEMY Bearings inikezela ngenkxaso yokukhetha esekelwe kwikhathalogu kwii-OEM, abasasazi, kunye nabathengi bemizi-mveliso, kunye noluhlu olubanzi lwee-bearings zebhola ezichanekileyo kunye nolwazi lobuchwephesha ngekhathalogu yayo ye-e kunye nezixhobo ze-FAQ.
Ixesha leposi: Epreli-27-2026