Ukucindezela Ibholithi Lokuthwala I-Slewing vs I-Torque Wrench: Iyiphi Indlela Ehlinzeka Ngokulayisha Okuqhubekayo Kwama-turntable E-Mining Shovel?

Ukucindezela Ibholithi Lokuthwala I-Slewing vs I-Torque Wrench: Iyiphi Indlela Ehlinzeka Ngokulayisha Okuqhubekayo Kwama-turntable E-Mining Shovel? | Yining Hydraulic

TL;DR — Izinto Ezibalulekile Okufanele Uzicabangele

Izindlela ze-torque wrench zithola ukunemba kokulayisha kusengaphambili okungu-+/-25-35% ngoba u-85-90% we-torque esetshenziswayo iya ekunqobeni intambo kanye nokungqubuzana okungaphansi kwekhanda, hhayi ekweluleni i-bolt — ukucindezela i-bolt kufeza ukunemba okungu-+/-5-10% ngokwelula i-bolt ngokuqondile nge-hydraulically.
Kuma-bolts okubopha ama-slewing kuma-turntable e-shovel okumba (M36-M56, Class 10.9 noma 12.9), ukucindezela kwe-hydraulic bolt kuyindlela kuphela eletha umthwalo wangaphambi kwesikhathi oqhubekayo kuwo wonke ama-bolts asendilinga.— izindlela ze-torque zivame ukukhiqiza umehluko wokulayisha kusengaphambili ongu-40-60% phakathi kwama-bolt aqinile kakhulu nakhululekile, okubangela ukulayisha okungalingani kwama-bearing race kanye nokwehluleka kwama-bearing ngaphambi kwesikhathi.
Inqubo yokuqinisa amabhawodi idinga amaphasi okuqinisa amabhawodi angu-3-4 (hhayi iphasi elilodwa) ngoba ibhawodi ngalinye elicindezelwe endilinga likhulula amabhawodi aseduze ngo-10-15% ngenxa yokucindezelwa kwamalunga.— ukweqa ama-re-tensioning passes kushiya ama-outer bolts ku-60-70% wokulayisha kwawo kwangaphambili okucacisiwe.

Kungani Ukungaguquguquki Kwe-Bolt Preload Kubalulekile Kuma-Slewing Bearings: Inkinga Yokulayisha Okungalingani Akekho Oyibonayo Kuze Kube Ukwehluleka Kwe-Bearings

Ngiklame izinhlelo zokushayela i-slewing kwa-Yining Hydraulic iminyaka eyishumi nanhlanu, futhi amajoyinti e-slewing bearing bolt yilapho ngibona khona igebe elikhulu phakathi kwenhloso yokucaciswa kanye nokusebenza kwensimu.I-bearing ye-slewing etafuleni le-shovel lokumba elingamathani angu-200 iqiniswe ngama-bolts angu-40-60 anamandla aphezulu (ngokuvamile i-M42-M56, i-Class 10.9 noma i-12.9) ahlelwe ngephethini ye-bolt eyindilinga enobubanzi bamamitha angu-2-3.Ibholthi ngalinye kumele ligcine ukulayisha kwangaphambili okucacisiwe — ngokuvamile okungu-60-70% womthwalo wokuvikela ibholthi, okuhambisana no-400-600 kN webholthi ye-M48 Class 10.9 — ukuvimbela umjaho wamabhereli ukuthi ungaphakami endaweni yokufaka ngaphansi komzuzu wokugumbuqela owenziwe lapho i-shovel dipper ilayishwe ngokugcwele futhi inwetshiwe. Uma ukulayisha kwangaphambili kungaguquki, umjaho wamabhereli ubhekana nengcindezi yokuxhumana engalingani, futhi umjaho uyawohloka endaweni lapho umthwalo ungaphansi — okudala isimo esibizwa ngokuthi "ukugoqa" lapho izakhi ezigoqayo zingena khona ebusweni bomjaho, ziqala ukugoqa okuqhubekela phambili ekuhlulekeni kwamabhereli okuphelele zingakapheli amahora okusebenza angu-2,000-5,000.

Inkinga yokungaguquguquki kokulayisha kusengaphambili: izindlela zokubopha i-torque zisebenzisa i-torque ekhanda le-bolt noma ku-nut, futhi ubudlelwano phakathi kwe-torque esetshenzisiwe kanye nokucindezeleka kwe-bolt okubangelwayo kuncike ku-coefficient of friction ezindaweni ezimbili - ukuxhumana kwentambo kanye nokuxhumana okungaphansi kwekhanda (noma okungaphansi kwe-nut).Ubudlelwano be-torque-tension: T = K × F × d, lapho kusetshenziswa khona i-torque, i-K iyisici se-nut (ngokuvamile i-0.15-0.22 yezintambo zensimbi ezigcotshwe), i-F iyingcindezi ye-bolt ephumayo, kanti i-d iyi-nominal bolt diameter. Inkinga ukuthi i-K ayiyona into engaguquki — iyahlukahluka phakathi kwama-bolt kuye ngokuthi umphezulu wentambo uqediwe yini, isimo sokugcotshwa, ukuthi ngabe i-bolt ike yagoqwa yini ngaphambilini (izintambo ezisetshenziswe kabusha zinenani eliphakeme le-K ngoba ukungalingani komphezulu kuthambekile), nokuthi ngabe kukhona yini udoti emicu.Isilinganiso esifanelekile sokwehluka kwe-K ezimweni zasensimini singu-+/-15-25%, okuhunyushwa ngokuqondile ku-+/-15-25% ukwehluka kokulayisha kwangaphambili kwebholithi kwe-torque efanayo esetshenzisiwe.Kwibholithi edinga ukulayisha kwangaphambili okungu-500 kN ene-K engu-0.18 ku-d ka-48mm: T = 0.18 × 500,000 × 0.048 = 4,320 Nm. Uma i-K ihluka ngempela phakathi kuka-0.15 no-0.22 kulo lonke ibhodithi, i-torque efanayo engu-4,320 Nm ikhiqiza ukulayisha kwangaphambili okusukela ku-410 kN kuya ku-600 kN — ukusabalala okungu-46% phakathi kwamabhawodi akhululekile naqinile kakhulu. Ngokusho kwe-I-VDI 2230amazinga okubala amalunga ebholiti ahlelekile, ukuqinisa okulawulwa yi-torque kufeza ukusabalala kokulayisha kusengaphambili okungu-+/-25-35% ngisho nangaphansi kwezimo zelebhu ezilawulwayo, futhi izimo zasensimini zivame ukwandisa lokhu kube ngu-+/-35-50%.

Ukuqina Kwebholithi Ye-Hydraulic: Indlela Ukwelula Okuqondile Okuqeda Ngayo Ukuguquguquka Kokungqubuzana

Ukucindezela kwebholidi le-hydraulic kudlula ngokuphelele ukuguqulwa kwe-torque-to-tension ngokusebenzisa ingcindezi ye-hydraulic eyaziwayo ku-tensioner edonsa ngqo i-bolt stud, iyinwebe ngokunwebeka.I-tensioner yakhiwe yi-cylinder ye-hydraulic ene-puller enentambo egoqekayo enwetshiwe kwi-bolt stud extension (i-bolt kumele ibe nobude bentambo obuveziwe ngaphezu kwe-nut obulingana okungenani nobubanzi be-bolt eyodwa ukuze i-tensioner ibambe), ibhuloho elimelana nobuso obuhlangene, kanye ne-socket evumela i-nut ukuthi ijikiswe ngesandla ngemva kokuba i-bolt iluliwe. Uchungechunge lokusebenza: i-tensioner ifakiwe ku-bolt, ingcindezi ye-hydraulic isetshenziswa enanini elicacisiwe (elibalwa kusukela endaweni ye-piston esebenzayo ye-tensioner), i-bolt inwebeka ngokunwebeka (ukuphakama okungu-0.1-0.3mm kwama-bolt ajwayelekile okuthwala i-slewing), i-nut ijikiswe phansi iqiniswe ngomunwe kusetshenziswa i-socket emzimbeni we-tensioner, ingcindezi ye-hydraulic iyakhululwa, futhi i-bolt izama ukubuyela kubude bayo bokuqala - kodwa i-nut iyayivimbela, idala ukulayisha kwangaphambili okucacisiwe ku-bolt.

Ukunemba kokulayisha kusengaphambili kokucindezelwa kwe-hydraulic: +/-5-10%, uma kuqhathaniswa ne-+/-25-35% yezindlela ze-torque wrench.Ukunemba kuvela eqinisweni lokuthi ukucindezeleka kwebholidi kulawulwa ukucindezela kwe-hydraulic, okulinganiswa futhi kulawulwa ngokunemba kwe-+/-1-2% nge-gauge yokucindezela yephampu yokucindezela noma i-transducer. I-modulus enwebekayo yebholidi (i-modulus kaYoung, i-207 GPa yensimbi ye-alloy) iyafana ngaphakathi kwe-+/-2% yamabholidi avela endaweni efanayo yokwelashwa kokushisa. Okuwukuphela kokuguquguquka ubude bokubopha obusebenzayo (ubude bebholidi phakathi kwe-nut kanye nentambo yokuqala ehlanganisiwe), ehluka ngo-+/-3-5% kuye ngokujula kokubandakanyeka kwentambo kanye nobude bokubamba kwebholidi.Iphutha elisele ekulayisheni kwangaphambili okucindezelwe livela emithonjeni emibili:(1) ukuphumula kwebholthi ngemva kokukhululwa kokucindezeleka (ijoyinti liyacindezelwa lapho i-tensioner isusiwe, kunciphisa ukucindezeleka kwebholthi ngo-5-10% — kubalwa ngokusebenzisa ukucindezeleka okweqile okungu-5-10% ngesikhathi sokucindezeleka), kanye (2) ukusebenzisana kwebholthi eliseduze (ibholthi lokucindezela #2 linciphisa ukucindezeleka kwebholthi #1 ngo-10-15% ngoba ukucindezeleka kwebholthi #2 kucindezela kakhulu ijoyinti, ibholthi eliphumzayo #1 — elibhekene nama-pass okucindezela angu-3-4).I-ASME PCC-1Iziqondiso zokuhlanganisa amalunga anebholidi, ukucindezela kwe-hydraulic kuyindlela ekhethwayo yamalunga anebholidi elikhulu adinga ukunemba kokulayisha kusengaphambili okungu-+/-10% noma ngaphezulu.

Amaphasi Okucindezela: Iphrothokholi Yokudlula Amaphasi Amathathu-4 Akekho Ofuna Ukwenza Kodwa Wonke Umuntu Uyakudinga

I-tensioning pass eyodwa — lapho i-bolt ngayinye icindezelwa khona kanye nxazonke zendilinga — ikhiqiza ukushintshashintsha kokulayisha kusengaphambili okungu-30-50% ngoba i-bolt ngayinye ecindezelwa ngokulandelana icindezela i-joint futhi ikhulule ama-bolts acindezelwe ngaphambilini.Indlela yokusebenza: uma ibholithi #1 icindezelwe ku-500 kN, icindezela ijoyinti endaweni ezungeze ibholithi #1. Uma ibholithi #2 (eduze nebholithi #1) icindezelwe, ukucindezela okwengeziwe kwejoyinti endaweni ephakathi kwamabholithi #1 no-2 kubangela ukuthi ukujiya kwejoyinti endaweni yokubamba yebholithi #1 kwehle kancane - kunciphisa ukucindezeleka kwebholithi #1 cishe ngo-10-15%. Njengoba ukucindezela kuqhubeka nxazonke kwendilinga, ibholithi ngalinye lilahlekelwa ukucindezeleka kancane kancane, kanti ibholithi lokuqala elicindezelwe lilahlekelwa kakhulu - ngokuvamile liphela ku-50-60% wokucindezeleka kwalo kokuqala ngemva kokuba wonke amabholithi asendilinga ecindezelwe.

Iphrothokholi efanele yokuqinisa: amaphasi angu-3-4 azungeze indilinga yebhawodi, lapho iphasi lokuqala lingama-50-60% okuqinisa kokugcina ukuze kuhlaliswe ijoyinti, bese kuthi amaphasi alandelayo abe nokucindezela kokugcina okungu-100%.I-Pass 1: qinisa wonke amabhawodi abe ngu-60% wokulayisha kokugcina (isb., 300 kN ngokwencazelo engu-500 kN) — lokhu kubeka ingxenye yejoyinti futhi kunciphisa umphumela wokuphumula ekudluleni okulandelayo. I-Pass 2: qinisa wonke amabhawodi abe ngu-100% wokugcina wokulayisha (500 kN). I-Pass 3: qinisa kabusha wonke amabhawodi abe ngu-100% wokugcina wokulayisha — lokhu kudlulisa kuvame ukubuyisela ukucindezeleka okungu-10-15% kumabhawodi engxenye yokuqala aphumule ngesikhathi se-pass 2, kanti umphumela wokuphumula ku-pass 3 wehliswa ube ngu-3-5% ngoba ijoyinti manje selihlezi ngokuphelele. I-Pass 4 (ongakukhetha kodwa kunconywa kumajoyinti abalulekile): qinisa kabusha kube ngu-100% bese uqinisekisa ukuthi akukho bholiti elilahlekelwa ukucindezeleka okungaphezu kuka-5% phakathi kokucindezela kanye nokulinganisa kokuqinisekisa (kusetshenziswa i-ultrasonic bolt elongation gauge uma ikhona).Yining Hydraulic, izinqubo zethu zokufaka i-slewing drive zifaka phakathi inqubo yokuqinisa ama-pass amane ephoqelekile kuwo wonke ama-bolt bolt ahlanganisa imishini yokumba, futhi sinikeza iphampu yokuqinisa, i-tensioner, kanye nemibhalo yenqubo kukho konke ukulethwa kwe-slewing drive.

Ukulungiswa Kwebholti: Izici Ezintathu Eziguqula Inqubo Ephelele Yokucindezela Ibe Yijoyinti Ehlulekile

Ngisho noma kunamandla okucindezela amanzi, izici ezintathu zokulungiselela amabhawodi zinganciphisa ukulayisha kwangaphambili kube ngu-50-70% wenani elicacisiwe, futhi zonke ezintathu zivame ukunganakwa ngesikhathi sokufakwa kwensimu.Isici sokuqala: ukugcotshwa kwentambo — imicu yebholidi kanye nendawo yokuthwala amantongomane kumele kugcotshwe nge-lubricant ecacisiwe (ngokuvamile i-molybdenum disulfide paste, i-anti-seize compound, noma i-lubricant enconywa ngumenzi webholidi) ukuze kufezwe ukungqubuzana kwentambo okuhambisanayo ngesikhathi sokucindezela. Imicu noma imicu eyomile egcotshwe nge-lubricant ehlukile kunecacisiwe ishintsha i-coefficient yokungqubuzana futhi ishintshe ukumelana kokuguguleka kwentongomane, okwenza i-nut ikhululeke kancane ngesikhathi sokukhishwa kwengcindezi. Isici sesibili: ubude bokubamba i-bolt — i-shank engafakwanga intambo yebholidi phakathi kwekhanda nentambo yokuqala ebambekile kumele okungenani ibe nobubanzi bebholidi obuphindwe kathathu kuya kane ukuze ibholidi leluleke ngokunwebeka ngesivinini sentwasahlobo esifanele. Ibholidi elinobude bokubamba obungaphansi kwezikhathi ezimbili ububanzi linesivinini sentwasahlobo esiphezulu kakhulu, okusho ukuthi lidinga amandla amaningi okucindezela ukuze kunwetshwe okufanayo futhi lizwela kakhulu ekuphumuleni. Isici sesithathu: ukuthamba kobuso obuhlangene — izindawo zokufaka ngaphansi kwekhanda lebholidi kanye ne-nut kumele zibe zithe tyaba ngaphakathi kuka-0.1mm ngaphezu kobubanzi bokuthwala. Ubuso obungasicaba bubangela ukucindezeleka okugobile ebhodweni ngaphezu kokucindezeleka kokudonsa, okunciphisa ukulayisha okusebenzayo kwebhodwe kanye nokuphila kokukhathala ngo-30-50%.

Ukuqinisekiswa ngemva kokucindezela: ukulayisha kwangaphambili kwebholithi kungaqinisekiswa ngokulinganisa ukunwebeka kwebholithi nge-ultrasonic bolt gauge (indlela ye-pulse-echo, ukukala isikhathi sokujika nokubuya kwe-ultrasonic pulse ngobude bebholithi).Ukulinganiswa kobude ngaphambi nangemva kokuqina kunikeza ukucindezeleka kwangempela kwebholithi, okuphindaphindwa ngendawo enqamulayo yebholithi futhi i-modulus kaYoung inikeza ukulayisha kwangempela. Lena yindlela yokulinganisa eqondile kuphela yokulayisha kwangaphambili kwebholithi efakiwe — ukulinganisa i-torque (ukuhlola i-torque ephukile) akuhlobene nokulayisha kwangaphambili uma ibholithi selicindezelwe ngoba ukungqubuzana okungaguquki (i-torque ephukile) kuphakeme kunokungqubuzana okuguquguqukayo ngesikhathi sokuqinisa.Yining Hydraulic, sincoma ukuqinisekiswa kokunwetshwa kwebholithi le-ultrasonic kwamabholithi okubopha ama-slewing kumafosholo okumba ane-turntable diameters engaphezu kwamamitha angu-2.5, lapho ukulayisha kwangaphambili okungaguquki kubangela ukulayisha okungalingani kwamabheri okungenakutholakala kuze kube yilapho kuqala ukwehluleka kwamabheri. Bheka futhi umhlahlandlela wethu ku-ukuhlanganiswa nokufakwa kwebhokisi legiya lokushefaukuze uthole isiqondiso esengeziwe sejoyinti eliboshwe.

imibuzo ejwayelekile ukubuzwa

Q1: Kungani ukungaguquguquki komthwalo webholithi kubalulekile kuma-bearings okushelela kuma-turntable efosholo okumba?: Ukulayisha kusengaphambili okungaguquki kubangela ingcindezi yokuxhumana komjaho wamabhereyitha engalingani, okuholela ekuguqukeni komjaho okubizwa ngokuthi i-brinelling lapho izinto ezigoqekayo zingena khona ebusweni bomjaho. Lokhu kuqala ukuqhekeka okuqhubekela phambili ekuhlulekeni okuphelele kwamabhereyitha zingakapheli amahora angu-2,000-5,000 okusebenza. Amabholthi okuthwala amabhereyitha (M36-M56, Class 10.9/12.9) kumele agcine ukulayisha kwangaphambili okungu-60-70% komthwalo wobufakazi ukuze kuvinjelwe ukukhuphuka komjaho ngaphansi kwezikhathi zokujika.
U-2: Iyini inzuzo eyinhloko yokucindezela i-hydraulic bolt phezu kwama-torque wrench kuma-slewing bearing bolts?: Ukucindezela kwe-hydraulic kwelula ngqo ibhawodi ngokucindezela kwe-hydraulic okulawulwayo, kufinyelela ukunemba kokulayisha kusengaphambili okungu-+/-5-10%. Ama-torque wrench ancike ebudlelwaneni be-torque-to-tension (T = K × F × d), lapho i-nut factor K ihlukahluka khona +/-15-25% ngenxa yokwehluka kokungqubuzana kwentambo — okukhiqiza ukusabalala kokulayisha kusengaphambili okungu-+/-25-35% ezimweni zelebhu kanye no-+/-50% ezimweni zasensimini.
UMBUZO 3: Zingaki iziphambano zokucindezela ezidingekayo ukuze kudonswe izimbobo zebhawodi, futhi ngani?: Kudingeka amaphasi angu-3-4. Iphasi elilodwa ku-60% wokulayisha kokugcina lihlalisa ijoyinti. Iphasi eli-2 ku-100% wokucindezela kokugcina kokulayisha konke. Iphasi eli-3 ku-100% libuyisa ukukhululeka okungu-10-15% kumabhawodi angaphambilini okubangelwa ukucindezelwa kwamalunga ngesikhathi sokudlulisa 2. Iphasi eli-4 (ongakukhetha) liqinisekisa ukucindezeleka okusele. Iphasi elilodwa likhiqiza ukwehluka kokulayisha kusengaphambili okungu-30-50% ngoba ibholithi ngalinye elilandelayo elicindezelwe likhulula amabhawodi aseduze acindezelwe ngaphambilini.
Q4: Yiziphi izici zokulungiselela ibhawodi ezithinta ukunemba kokuqina kwe-hydraulic ekufakweni kwensimu?: Izici ezintathu: (1) ukugcotshwa kwentambo kumele kusebenzise ukugcotshwa okucacisiwe — imicu eyomile noma egcotshwe ngendlela ehlukile ukumelana nokuguguleka kwe-nut ngesikhathi sokukhululwa kokucindezeleka; (2) ubude bokubamba kwe-bolt kumele okungenani bube ububanzi be-bolt obuphindwe ka-3-4 ukuze kwelulwe ngokwanele; (3) ukuthamba kwendawo ehlangene ngaphakathi kuka-0.1mm ngaphezu kobubanzi be-bearing — izindawo ezingezona ezisicaba zibangela ukucindezeleka kokugoba okunciphisa ukulayisha okusebenzayo ngo-30-50%.
Q5: Ukulayisha kwangaphambili kwebholithi kungaqinisekiswa kanjani ngemva kokucindezela kwe-hydraulic?: Indlela eqondile kuphela ukulinganisa ukunwebeka kwe-bolt nge-ultrasonic (i-pulse-echo, ukukala isikhathi sokujikeleza kwe-ultrasonic nge-bolt ngaphambi nangemva kokucindezela). Ukunwebeka okuphindaphindwe ngendawo ye-bolt cross-sectional kanye ne-modulus kaYoung kunikeza ukulayisha kwangaphambili kwangempela. Ukuqinisekiswa kwe-torque (i-breakaway torque) akuthembekile ngemva kokucindezela ngoba ukungqubuzana kwe-static breakaway akuhlobene nokulayisha kwangaphambili.

Izinkomba Zangaphandle: Ukubalwa Kwe-VDI 2230 Bolt Joint · Amajoyinti Aboshwe Nge-ASME PCC-1 · Ukuhlukaniswa kwe-DNV · Izinhlelo ze-Hydraulic ze-ISO 4413 · I-SAE International · Amazinga e-AGMA · Imithetho ye-ABS

Idatha yensimu ye-Yining Hydraulic — Imayini yensimbi yasePilbara ka-2019, amafosholo okumba ayi-8 ane-slewing bearing bolt failure analysis:Iqembu lamafosholo ezintambo zikagesi angu-8 (iklasi lamathani angu-220) labhekana nokushintsha amabhereli okushelela angu-5 eminyakeni emi-3 - izindleko zokushintsha ezingu-US$180,000 ngebhereli kanye nezinsuku eziyi-10 zokungasebenzi kwebhereli. Ukuhlaziywa kwembangela yezimpande kwembule ukuthi amabholithi afakwe kusetshenziswa ama-torque wrenches (hhayi ama-tensioner), futhi ukushintshashintsha kokulayisha kusengaphambili okulinganisiwe kulo lonke ibhodi lamabholithi kwakungama-42-58%. Ukugijima kwamabhereli kubonise amaphethini okufaka usawoti angalingani ahambisana ngqo nezindawo lapho ukulayisha kwangaphambili kwamabholithi kwakungaphansi kwama-60% wemininingwane. Ngemva kokushintshela ekucindezelweni kwe-hydraulic ngephrothokholi yama-pass angu-4, imikhumbi yabhekana nokwehluleka kwe-zero kwamabhereli okushelela eminyakeni emi-4 eyalandela. Izindleko zemishini yokucindezela yayingu-US$12,000 ngefosholo - uma kuqhathaniswa no-US$180,000 ngebhereli, i-ROI yatholakala phakathi kokwehluleka kokuqala okugwenyiwe.

Isixwayiso sokugcina seminyaka eyishumi nanhlanu sokusebenza kwe-slewing drive: ungalokothi uphinde usebenzise ama-bolt e-slewing bearing ngemuva kokuthi esesusiwe. Ama-bolt alayishwe ngokugcwele aguqulwa ngepulasitiki emicu embalwa yokuqala ehlanganisiwe, futhi ukuphinda acindezele i-bolt esetshenzisiwe kukhiqiza ukulayisha okungalindelekile - ngokuvamile okuphansi ngo-15-25% kune-bolt entsha ngenxa yokucindezela okufanayo kokucindezela - ngoba indawo yokuguqulwa kwepulasitiki inyuse ubude bokubopha obusebenzayo.

Ukuze uthole imininingwane yebholithi yokubopha insimbi, izincomo zemishini yokubopha insimbi, noma ukuqinisekiswa komklamo webholithi elenziwe ngokwezifiso, xhumana nethimba lethu lobunjiniyela kwa-Yining Hydraulic — sinemishini yokubopha insimbi kanye nemibhalo yenqubo elungele imodeli yakho ethile yokubopha insimbi.

Isikhathi sokuthunyelwe: Meyi-20-2026