Momwe Mungasankhire Chotengera cha Mpira Cholumikizirana ndi Angular

Chiyambi

Kusankha bearing ya mpira wolumikizana ndi angular kumafuna zambiri kuposa kukula kofanana kwa bore ndi mainchesi akunja. Chifukwa ma bearing awa amanyamula katundu wolumikizana wa radial ndi axial kudzera mu ngodya yolumikizirana yodziwika bwino, chisankho choyenera chimadalira momwe katunduyo amagwiritsidwira ntchito, liwiro logwirira ntchito, kuuma kofunikira, momwe mafuta amagwirira ntchito, ndi nthawi yomwe ntchitoyo ikuyembekezeka. Chiyambichi chikuwonetsa zinthu zofunika kwambiri zomwe zimakhudza magwiridwe antchito a bearing, kuphatikiza kukonzekera kamodzi motsutsana ndi kawiri, kuyika zinthu pasadakhale, zosankha za zinthu ndi khola, komanso zofunikira pakugwiritsa ntchito. Poganizira izi, nkhani yonseyi ikuthandizani kuwunika bwino zomwe zimapangidwira ndikupewa kusankha komwe kumabweretsa kutentha, kuwonongeka msanga, kapena kuchepa kwa kudalirika kwa makina.

Chifukwa chiyani kusankha chogwirira cha mpira cholumikizana ndi angular choyenera kuli kofunika?

Kusankha mtundu woyenera wa mpira wolumikizana ndi angular ndikofunikira kwambiri pakupanga makina ozungulira omwe ali ndi katundu wophatikizana wa radial ndi axial. Mosiyana ndi mitundu yodziwika bwino ya groove yozama, mapangidwe a angular contact ali ndi njira zothamangira zosagwirizana zomwe zimatumiza mphamvu kudutsa ngodya yolumikizira yokhazikika. Ubwino uwu umawathandiza kuthandizira katundu wofunikira woyendetsedwa ndi ma radial, zomwe zimapangitsa kuti akhale ofunikira kwambiri mu ma spindles a zida zamakina, mapampu amafakitale, ndi ma gearbox apamwamba.

Kwa magulu a uinjiniya ndi ogula zinthu, kusankha mabenchi kumapitirira malire ofanana. Zofunikira zazikulu zamakonontchito zamafakitalekumafuna kumvetsetsa bwino za kinematics yamkati, kugawa katundu, ndi mphamvu ya kutentha. Kulephera kugwirizanitsa zofunikira za bearing ndi malo ogwirira ntchito kumawononga umphumphu wa makina, kumawonjezera bajeti yokonza, komanso kumachepetsa kwambiri nthawi yapakati pakati pa kulephera (MTBF).

Kuwongolera katundu, liwiro, kuuma, ndi moyo wautumiki

Magawo oyambira ogwirira ntchito omwe amalamulira kusankha kwa bere la mpira wolumikizana ndi angular ndi komwe katundu akupita, liwiro lozungulira, ndi kuuma kwa dongosolo komwe kumafunika. Chifukwa mabere awa amathandizira katundu wa axial mbali imodzi yokha, nthawi zambiri amaikidwa awiriawiri kapena ma multiplex sets. Kuyesa kwa dynamic load (C) ndi kuyeserera kwa static load (C0) ndi maziko owerengera moyo wa L10 basic rating. Mu ntchito zofunika kwambiri monga kugwiritsa ntchito mapampu a centrifugal mosalekeza, mainjiniya nthawi zambiri amayang'ana moyo wautumiki wa L10 wopitilira maola 100,000.

Mphamvu ya liwiro imakhudzidwa kwambiri ndi ngodya yamkati yolumikizirana ndi zinthu zozungulira za bearing. Magwiritsidwe ntchito omwe amafuna kuthamanga mwachangu komanso kuthamanga kwambiri kozungulira, monga ma spindles a zida zamakina a CNC, nthawi zambiri amafuna zinthu zothamanga (n × dm) zopitilira 1.0 × 10^6 mm/min. Kuti akwaniritse izi, mainjiniya ayenera kulinganiza bwino ngodya yolumikizirana ndi kuuma kofunikira. Ngodya yocheperako yolumikizirana imawonjezera mphamvu ya liwiro pochepetsa katundu wa mpira wa centrifugal, pomwe ngodya yolumikizirana yapamwamba imakulitsa kuuma kwa axial ndi mphamvu yonyamula katundu.

Zoopsa zogwirira ntchito za kusankha kolakwika kwa ma bearing

Kusankha ma bearing olakwika kumabweretsa zoopsa zazikulu zomwe zimafalikira mu makina onse. Kusakwanira kwa ma preload kapena ma contact angles osakwanira nthawi zambiri kumabweretsa kupsinjika kwakukulu kwa Hertzian contact, zomwe zimapangitsa kuti subsurface iwonongeke komanso kuti misewu ya raceways iwonongeke. Kuphatikiza apo, kusakhala ndi mphamvu yokwanira ya axial pansi pa liwiro lalikulu kungayambitse kuti mipira igwedezeke m'malo mogudubuzika, zomwe zimapangitsa kuti filimu ya elastohydrodynamic lubrication iwonongeke ndikupangitsa kuti guluu liwonongeke mwachangu.

Kusakhazikika kwa kutentha ndi zotsatira zina zofunika kwambiri chifukwa chosasankha bwino. Ngati bearing yokhala ndi preload yambiri ikugwiritsidwa ntchito mwachangu, mphamvu yamkati yokangana imapanga kutentha kwakukulu. Kutentha kwa ntchito kukakwera pamwamba pa 120°C, chitsulo chokhazikika (52100) chimakhala ndi kusakhazikika kwa mawonekedwe, ndipo mafuta okhazikika amawonongeka mwachangu. Kukula kwa kutentha kumeneku kumalimbitsanso malo amkati, ndikupanga kuzungulira kwa kutentha komwe kumatha kubweretsa kugwa kwakukulu kwa bearing.

Mafotokozedwe a fanizo la mpira wolumikizana ndi angular kuti muwunikire

Kuwunika ma bearing a mpira wolumikizana ndi angular kumafuna kusanthula mwadongosolo kwa mawonekedwe awo amkati, zida zogwirira ntchito, ndi chitetezo cha chilengedwe. Gawo lililonse limalumikizana ndi linzake kuti lifotokoze momwe bearing imagwirira ntchito, malire a kutentha, ndi kuyenerera konse pakugwiritsa ntchito komwe kukufunika.

Ngodya yolumikizirana, kapangidwe ka mizere, ndi kakonzedwe kake

Ngodya yolumikizirana ndiyo chizindikiro chachikulu cha bearing ya mpira wolumikizirana. Makampani odziwika bwino nthawi zambiri amakhala ndi ngodya zolumikizirana za 15°, 25°, kapena 40°. Ngodya ya 15° imakonzedwa bwino kuti igwiritsidwe ntchito mwachangu kwambiri ndi katundu wozungulira, pomwe ngodya ya 40° imapangidwa kuti igwire katundu wolemera wa axial pa liwiro lochepa.

Kupitirira ngodya, kapangidwe ka mzere ndi kakonzedwe kake zimalamulira kulimba kwa dongosolo. Ma bearing a mzere umodzi ayenera kusinthidwa motsutsana ndi bearing yachiwiri. Akayikidwa awiriawiri, amatha kukonzedwa Back-to-Back (DB) kuti azitha kulimba kwambiri, Face-to-Face (DF) kuti atsatire zolakwika zazing'ono, kapena Tandem (DT) kuti agawane katundu wolemera wa axial womwe uli mbali imodzi.

Kuyika zinthu pasadakhale, malo olowera mkati, zinthu zogwirira ntchito m'khola, ndi kapangidwe ka msewu wothamangirako

Kuyika zinthu mu preload ndi mphamvu yamkati yomwe imagwiritsidwa ntchito mwadala yomwe imachotsa kutseguka ndikuwonjezera kulimba kwa dongosolo. Magulu a preload nthawi zambiri amagawidwa m'magulu a Light (Class A), Medium (Class B), ndi Heavy (Class C). Mwachitsanzo, kuyika zinthu mu preload yolemera ya 1,500 N kungagwiritsidwe ntchito pa spindle bearing kuti athetse phokoso panthawi yodula zitsulo mwamphamvu, ngakhale izi zimawononga mphamvu ya liwiro lalikulu.

Kusankha zinthu za khola kumakhudza mwachindunji malire a kutentha ndi liwiro. Makhola a polyamide 66 olimbikitsidwa ndi ulusi wagalasi ndi opepuka ndipo amapereka mawonekedwe abwino kwambiri otsetsereka, koma nthawi zambiri amakhala ndi kutentha kosalekeza kwa 120°C. Pa kutentha mpaka 150°C kapena malo okhala ndi mafuta opaka mankhwala amphamvu, makhola a mkuwa kapena phenolic resin opangidwa ndi makina amalamulidwa. Kapangidwe ka malo otsetsereka, makamaka kuchuluka kwa osculation (chiŵerengero cha radius ya malo otsetsereka ndi m'mimba mwake wa mpira), kumatsimikiza kukula kwa contact ellipse ndipo kumakhudza mwachindunji malire a katundu wosasinthika wa bearing.

Malire a liwiro, kutentha, kuipitsidwa, ndi kutseka

Liwiro la kutentha ndi liwiro loletsa la bearing ya mpira wolumikizana ndi angular zimasonyeza kuti RPM yayikulu kwambiri yomwe ingatheke kutentha kusanachitike kuposa kutentha. Kugwira ntchito kupitirira malire awa kumafuna njira zapamwamba zothira mafuta, monga machitidwe a mpweya ndi mafuta. Malire a kutentha samangolamulidwa ndi chitsulo chokha, koma nthawi zambiri ndi zinthu zotsekera.

Ngati kuipitsidwa kuli pachiwopsezo, kutseka koyenera ndikofunikira kwambiri. Zishango zachitsulo zosakhudzana (ZZ) zimapereka kukangana kochepa koma chitetezo chochepa cha madzi. Zisindikizo zolumikizana (2RS) zopangidwa ndi Nitrile Butadiene Rubber (NBR) zimapereka fumbi ndi chinyezi chabwino kwambiri koma nthawi zambiri zimakhala ndi kutentha kochepa kuyambira -40°C mpaka +100°C. Pamalo otentha kwambiri, zisindikizo za Fluoroelastomer (FKM) zimafunika, zomwe zimawonjezera malire a kutentha mpaka +200°C pamtengo wotsika kwambiri.

Momwe ma bearing a mpira wolumikizirana ndi angular amafananira ndi mitundu ina ya ma bearing

Ngakhale kuti ma bearing a mpira wolumikizana ndi angular ndi apadera kwambiri, nthawi zambiri amawunikidwa malinga ndi ma bearing a mpira wozama kwambiri (DGBB) ndi ma bearing a roller opindika (TRB). Kusankha ukadaulo wabwino kwambiri wa rolling element kumafuna kumvetsetsa bwino za kusinthana kwa makina komwe kumachitika pa kapangidwe kalikonse.

Ngati ma bearing a mpira wolumikizana ndi angular ndi chisankho chabwino

Ma bearing a mpira wolumikizana ndi angular ndi chisankho chabwino kwambiri pamene pulogalamu ikufuna kulinganiza bwino liwiro lozungulira komanso kuthandizira kolimba kwa axial. Ma bearing a mpira wozama amatha kuthana ndi katundu wocheperako wa axial, koma kapangidwe kake ka symmetrical raceway kamachepetsa mphamvu yawo yopondereza ndikupangitsa kuti azitha kudulidwa mosavuta ndi mpira pansi pa mphamvu zolemera za axial. Mosiyana ndi zimenezi, ngakhale ma bearing a roller opendekeka amapereka mphamvu zambiri zonyamula katundu chifukwa cha geometry yawo yolumikizana ndi mzere, amapanga kukangana kwakukulu.

Mu ntchito zolondola, monga ma centrifuge othamanga kwambiri kapena ma gearbox amagetsi ochepetsa magalimoto omwe amagwira ntchito pa 10,000 RPM, mphamvu ya friction torque mu angular contact ball bearing nthawi zambiri imakhala yotsika ndi 20% mpaka 30% kuposa ya tapered roller bearing yofanana. friction yotsika iyi imatanthauza mwachindunji kuchepa kwa mphamvu ya parasitic, kutentha kochepa kwa ntchito, komanso nthawi yayitali ya mafuta.

Zofunikira zoyerekeza zisankho zofotokozera

Posankha mfundo yomaliza, mainjiniya ayenera kuyeza mphamvu ya radial, mphamvu ya axial, ndi malire a kinematic. Matrix yotsatirayi ikuwonetsa malire ogwirira ntchito a zomangamanga zitatuzi zodziwika bwino, poganizira kuti ma diameter ofanana a bore.

Ngati choletsa chachikulu pakupanga ndi kugwedezeka kwambiri pa liwiro lotsika, chogwirira chozungulira chocheperako ndicho chimakondedwa. Komabe, ngati mfundozo zimafuna kulondola kwa sub-micron runout pamodzi ndi ntchito yothamanga kwambiri, ma bearing a mpira wolumikizana ndi angular contact ndiwo njira yokhayo yothandiza.

Njira yothandiza yosankhira ndi kupeza zinthu

Kusintha kuchoka pa uinjiniya wa chiphunzitso kupita ku kugula zinthu mwaluso kumafuna njira yosankha bwino komanso yopezera zinthu mwanzeru. Kupeza ma bearing a mpira wolumikizana ndi angular, makamaka magulu olondola, kumaphatikizapo kuyendetsa njira zovuta zoperekera zinthu, kutsimikizira mtundu wa zitsulo, ndikuwonetsetsa kuti zinthuzo zikupezeka kwa nthawi yayitali.

Njira yosankha sitepe ndi sitepe

Njira yosankha iyenera kutsatira njira yokhwima komanso yotsatizana kuti isapangidwenso zinthu modula. Choyamba, mainjiniya ayenera kufotokoza mbiri yeniyeni ya katundu, powerengera katundu wofanana wa mphamvu (P). Chachiwiri, ngodya yoyenera yolumikizirana imasankhidwa kuti igwirizane ndi chiŵerengero cha katundu wa radial-to-axial. Chachitatu, dongosolo (DB, DF, kapena DT) ndi kalasi yoyambira kunyamula katundu imakhazikitsidwa kutengera kuuma kwa shaft komwe kumafunika.

Pomaliza, magulu a kulekerera ayenera kufotokozedwa. Pa ma gearbox a mafakitale, kulekerera kwa ISO P0 (ABEC 1) kapena P6 (ABEC 3) ndikokwanira. Komabe, pakugwiritsa ntchito molondola monga ma actuator a ndege kapena zida zamakina, mainjiniya ayenera kufotokoza kulekerera kwa ISO P4 (ABEC 7) kapena ISO P2 (ABEC 9), komwe kuthamangira kwa radial kumakhala kochepa kuposa ma micrometer 2.5.

Luso la ogulitsa, zolemba zabwino, ndi kutsata

Kuyenerera kwa ogulitsa ndikofunikira kwambiri pa ma bearing a mpira wolumikizana ndi angular chifukwa cha kukhudzidwa kwawo ndi kusinthasintha kwa kupanga. Magulu ogula ayenera kuwunika ogulitsa kuti awone ngati ali ndi luso lapamwamba lopanga, kufuna zikalata zonse zabwino. Izi zikuphatikizapo zikalata zotsimikizira kugwiritsa ntchito chitsulo choyeretsera choyera kwambiri, chochotsedwa mpweya (monga 100Cr6 kapena 52100) ndi zolemba zochizira kutentha zomwe zimatsimikizira kuuma kwa msewu wa raceway wa 58 mpaka 62 HRC.

Kutsata bwino kumatsimikizira kuti ngati vuto lalephera msanga, chifukwa chake chikhoza kupezeka. Opanga apamwamba amalemba manambala apadera pa mphete zolondola, zomwe zimamangiriza chinthucho ku gulu lake lenileni la opanga, lipoti lowunikira, ndi malo otentha a zinthu zopangira.

Kutsatira malamulo, nthawi yotsogolera, zinthu zomwe zili m'sitolo, ndi chithandizo cha pambuyo pake

Kupeza zinthu padziko lonse lapansi kumabweretsa magawo ena otsatira malamulo ndi zovuta zokhudzana ndi kayendedwe ka zinthu. Mabearing ndi mafuta omwe amagwiritsidwa ntchito ayenera kutsatira malangizo azachilengedwe am'deralo, kuphatikiza malamulo a RoHS ndi REACH. Kuphatikiza apo, unyolo woperekera zinthu wa akatswiri apaderamabearing olondola kwambirinthawi zambiri zimakhala zoletsedwa.

Nthawi yodziwika bwino yopezera ma bearings a ABEC-7 angular contact contact bearings opangidwa mwapadera kapena olondola kwambiri imatha kuyambira masabata 12 mpaka 24. Pofuna kuchepetsa zoopsa zogulira zinthu ndikuteteza nthawi yopangira, magulu ogula ayenera kukambirana maoda onse, kukhazikitsa zinthu zomwe ogulitsa amasunga (VMI), kapena kuwerengera kuchuluka kwa masheya otetezeka kutengera deta yakale ya MTBF kuti atsimikizire kuti chithandizo cha pambuyo pake sichingasokonezedwe.

Momwe mungasankhire njira yabwino kwambiri yopangira bearing

Kumaliza kusankha kwa angular contact ball bearing ndi chimaliziro cha kulumikiza chiphunzitso cha makina ndi zenizeni zamalonda. Kuwunika komaliza kuyenera kutsimikizira kuphatikiza kwaukadaulo mu zigawo zolumikizirana komanso momwe ndalama zimakhudzira moyo wonse wa polojekitiyi.

Mndandanda wazinthu zofunikira pakukonzekera ndi kukonza zinthu pasadakhale

Asanatulutse chikalata chomaliza cha zipangizo, mainjiniya ayenera kutsatira mndandanda wotsatira malamulo okhudza momwe shaft imagwirizanira ndi housing. Popeza ma bearing a mpira wolumikizana ndi angular amadalira mawonekedwe enieni amkati, kusakanikirana kosayenera kungasinthe mwangozi kuyika koyamba. Mwachitsanzo, kulekerera kwa j5 pa shaft kuphatikiza ndi kulekerera kwa H6 pa housing kuyenera kutsimikiziridwa mwa masamu motsutsana ndi clearance yamkati ya bearing.

Kukula kwa kutentha kuyeneranso kuganiziridwa mu njira yokonzekera kunyamula. Ngati kusiyana kwa kutentha kwa ntchito (Delta T) pakati pa shaft yozungulira ndi nyumba yosasuntha kupitirira 10°C, mphete yamkati idzakula mofulumira kuposa mphete yakunja. Mu dongosolo lolimba la Back-to-Back (DB), kutentha kumeneku kudzawonjezera kwambiri kunyamula mkati, zomwe mwina zidzakankhira bearing kudutsa malire ake ogwiritsira ntchito kutentha.

Kulinganiza malire aukadaulo, kupezeka, ndi mtengo wonse

Chisankho chachikulu chikufunika kulinganiza malire achitetezo chaukadaulo motsutsana ndi kupezeka kwa zigawo ndi Mtengo Wonse wa Umwini (TCO). Kusankha mopitirira muyeso bearing—monga kufuna ma tolerances a ABEC 7 pa pampu yaulimi yothamanga kwambiri—kumawonjezera ndalama zosafunikira popanda kupereka phindu pa ntchito. Kusintha kuchokera ku bearing ya ABEC 1 kupita ku bearing ya ABEC 7 kungawonjezere mtengo wa zigawo ndi zoposa 300%.

Mosiyana ndi zimenezi, kusatchula bwino mtengo wa chinthu chofunika kwambiri ndi chuma chabodza. M'malo opangira zinthu zambiri, kulephera kwa spindle mosayembekezereka kungayambitse kuti nthawi yogwira ntchito ya makina ipitirire $5,000 pa ola limodzi. Posankha chogwirira cholondola cha angular contact ball—chokonzedwa bwino kuti chigwirizane ndi katundu weniweni, liwiro, ndi malo otentha—mabungwe amatsimikizira kudalirika kwakukulu kwa katundu komanso phindu la nthawi yayitali pantchito.

Mfundo Zofunika Kwambiri

• Zomaliza zofunika kwambiri ndi zifukwa zomveka zogwiritsira ntchito mpira wolumikizana ndi angular
• Mafotokozedwe, kutsata malamulo, ndi macheke owopsa oyenera kutsimikiziridwa musanachite izi
• Njira zotsatila zogwira mtima komanso machenjezo omwe owerenga angagwiritse ntchito nthawi yomweyo

Mafunso Ofunsidwa Kawirikawiri

Kodi ndi ngodya iti yolumikizirana yomwe ndiyenera kusankha pa bolodi lolumikizirana la angular?

Gwiritsani ntchito 15° pa ma spindle othamanga kwambiri, 25° pa liwiro loyenera komanso katundu wolemera, ndi 40° pa katundu wolemera wa axial mu mapampu kapena ma compressor. Gwirizanitsani ngodya ndi liwiro lanu, komwe mukukankhira, ndi kuuma kwanu.

Kodi ma bearing a mpira wolumikizana ndi angular ayenera kugwiritsidwa ntchito liti awiriawiri?

Gwiritsani ntchito mawiri awiri pamene katundu wa axial akugwira ntchito mbali zonse ziwiri kapena pamene pakufunika kulimba kwambiri. Sankhani DB kuti muchepetse kuuma kwa mphindi, DF kuti muchepetse kusagwirizana, ndi DT kuti muchepetse kusuntha kwa axial komwe kumayendetsedwa mbali imodzi.

Kodi preload imakhudza bwanji magwiridwe antchito a bere?

Kuyika bwino zinthu pasadakhale kumathandizira kuuma ndi kulondola kwa ntchito. Kuyika kwambiri zinthu pasadakhale kumawonjezera kutentha ndi kukangana; kucheperako kungayambitse kutsetsereka pa liwiro lalikulu. Sankhani kuyika bwino zinthu pasadakhale kutengera liwiro, katundu, ndi kutentha.

Ndi deta iti yofunika kwambiri yomwe ndiyenera kukonzekera ndisanayitanitse kuchokera ku DEMY Bearings?

Perekani kukula kwa shaft ndi nyumba, katundu wa radial ndi axial, liwiro, kutentha, njira yothira mafuta, zomwe mumakonda kukonza, komanso nthawi yomwe ikuyembekezeka. Izi zimathandiza DEMY kupereka lingaliro loyenera la mpira wolumikizana ndi angular kuchokera ku kabukhu kake.

Kodi ndingapewe bwanji kulephera msanga kwa ma bearing a mpira wolumikizana ndi angular?

Sankhani ngodya yoyenera yolumikizirana, kuyikamo zinthu pasadakhale, ndi kukonzedwa bwino, ndipo onetsetsani kuti mafuta ndi oyenera. Pewani kudzaza kwambiri, kusalinganika bwino, komanso kutentha kwambiri. Kuti mugwiritse ntchito molimbika ndi OEM, pemphani njira zolondola komanso zabwino zomwe zikugwirizana ndi makina anu.