Buku Lotsogolera Kusankha Mabearings a Magalimoto pa Ntchito Zamakampani

Chiyambi

Kusankha mabearing a injini ya mafakitale kumakhudza zambiri kuposa nthawi yokwanira ndi yosinthira. Bearing yoyenera iyenera kuthana ndi katundu wa radial ndi axial, liwiro, kutentha, momwe mafuta amagwirira ntchito, kuipitsidwa, ndipo, nthawi zambiri, magetsi omwe angawononge misewu ya raceways pakapita nthawi. Kusagwirizana bwino kumatha kuwonjezera kugwedezeka, kufupikitsa moyo wa ntchito, kuwonjezera kugwiritsa ntchito mphamvu, ndikupangitsa kuti kuzima kokwera mtengo kosakonzekera. Bukuli likufotokoza mitundu yayikulu ya mabearing omwe amagwiritsidwa ntchito mu injini, zinthu zogwirira ntchito zomwe zimayendetsa kusankha, ndi kusiyana pakati pa magwiridwe antchito, kulimba, ndi kukonza kuti mupange zisankho zodalirika kwambiri pakugwiritsa ntchito mafakitale ovuta.

Chifukwa chiyani kusankha mabearing a mota ndikofunikira

Kufotokozera za ma bearing a mota ndi chisankho chofunikira kwambiri chaukadaulo chomwe chimalamulira kudalirika, magwiridwe antchito, komanso moyo wa zida zozungulira zamafakitale. Zimagwira ntchito ngati cholumikizira chachikulu pakati pa stator yosasuntha ndi shaft yozungulira, ma bearing amasamalira katundu wosinthasintha pomwe akusunga mipata yolondola ya mpweya. M'malo opangira mafakitale komwe ma motor amagetsi amayendetsa njira zopangira ma core, kusankha kapangidwe kabwino ka ma bearing sikuti kungoganizira zokonza koma ndikofunikira kwambiri kuti ntchito ipitirire.

Mainjiniya ayenera kuwunika matrix ovuta a zosintha zamakanika, kutentha, ndi zamagetsi kuti atsimikizire kutimabearing osankhidwaimatha kupirira ntchito zopitilira. Kusankha kosakwanira bwino kumathandizira kwambiri kuwonongeka kwa makina, zomwe zimapangitsa kuti makinawo awonongeke msanga, kugwedezeka kwambiri, komanso kuwonongeka kwakukulu kwa magalimoto.

Zotsatira pa nthawi yogwira ntchito komanso kugwiritsa ntchito mphamvu moyenera

Kugwirizana kwachindunji pakati pa kusankha mabearing ndi nthawi yogwira ntchito sikunganyalanyazidwe. Kulephera kwa magalimoto kosakonzekera m'mafakitale akuluakulu opitiliza ntchito, monga kuyeretsa mafuta kapena kupanga mapepala ndi pulp, kungayambitse ndalama zoyambira $10,000 mpaka kupitirira $100,000 pa ola limodzi. Popeza mabearing amapanga pafupifupi 40% mpaka 50% ya kulephera konse kwa magalimoto amagetsi, ndi gawo la makina lomwe ndi lovuta kwambiri pa drivetrain.

Kupatula kudalirika, kusankha mabearing kumakhudza kwambiri kugwiritsa ntchito mphamvu. Kukangana kwa makina mkati mwa bearing assembly nthawi zambiri kumakhala 10% mpaka 15% ya kutayika konse kwa makina mu mota yamagetsi yokhazikika. Mwa kutchula mapangidwe a zisindikizo zotsika, ma geometries okonzedwa bwino amkati, ndi kukhuthala koyenera kwa mafuta, mainjiniya amatha kuchepetsa kukana kozungulira. Izi zimachepetsa kukoka mphamvu kwa injini yonse ndipo zimathandiza kuti mphamvu zizigwiritsidwa ntchito bwino m'malo onse.

Mikhalidwe yogwirira ntchito yomwe imayendetsa kusankha

Mikhalidwe yogwirira ntchito m'mafakitale imafotokoza zofunikira zoyambira posankha mabearing. Kutentha kwambiri kwa malo ozungulira kumakhudza kwambiri njira zopangira zitsulo ndi mafuta. Mwachitsanzo, ma mota omwe amagwira ntchito m'malo obisika kapena omwe amagwiritsidwa ntchito kutentha kwambiri pafupi ndi uvuni wamafakitale amafunika mafuta apadera ndi chitsulo chokhazikika kutentha chomwe chingathe kusunga kukhazikika kwa mawonekedwe pa kutentha kosalekeza mpaka 200°C.

Kuphatikiza apo, kufalikira kwa ma Variable Frequency Drives (VFDs) kumabweretsa mavuto aakulu amagetsi ku ma bearing a mota. Ma VFD amapanga ma voltage apamwamba omwe angayambitse kugwedezeka kwamagetsi kudzera mu filimu yamafuta oyendera. Chochitika ichi, chodziwika kuti electrical discharge machining (EDM), chimapanga ma micro-craters pamisewu ya raceways ndikufulumizitsa kuwonongeka kwa mafuta. Kuphatikiza apo, malo okhala ndi tinthu tambirimbiri toyipa kapena chinyezi amafunika makonzedwe apadera otsekera, monga ma labyrinth seals kapena ma heavy-duty contact seals, kuti aletse kulowa kwa zinthu zakunja zomwe zingawononge zinthu zozungulira mwachangu.

Mafotokozedwe ofunikira ndi zofunikira pakugwiritsa ntchito

Kumasulira zofunikira pa ntchito kukhala magawo enaake a bearing kumafuna kuwunika kozama kwa zofunikira za makina. Mainjiniya ayenera kulinganiza mphamvu ya katundu, malire a liwiro la kinematic, ndi zoletsa kutentha kuti adziwe bearing yomwe ingakwaniritse nthawi yofunikira ya kutopa kwa L10h.

Katundu, liwiro, kutentha, ndi zinthu zodzola

Magawo a katundu amagawidwa m'magulu a mphamvu zozungulira ndi zozungulira. Kuchuluka kwa mphamvu zoyenda (C) ndi kusinthasintha kwa mphamvu zoyenda (C0) kumalamulira mphamvu ya bearing yogwira ntchito popanda kugonja. Mphamvu za liwiro zimayesedwa pogwiritsa ntchito ndm value ya bearing (average bearing diameter yochulukitsidwa ndi liwiro lozungulira), zomwe zimatsimikiza RPM yovomerezeka mphamvu zozungulira ndi kutentha komwe kumayambitsidwa ndi kukangana zisanapitirire malire otetezeka.

Kutentha ndi mafuta odzola zimagwirizanitsidwa mosalekanitsidwa. Chitsulo chokhazikika (100Cr6) nthawi zambiri chimakhala chokhazikika kuti chigwiritsidwe ntchito mpaka 120°C, koma mankhwala apadera otenthetsera amafunika kuti pakhale malire apamwamba. Kusankha mafuta odzola kuyenera kuwerengera kukhuthala kwa mafuta oyambira kutentha kogwirira ntchito, kuonetsetsa kuti makulidwe okwanira a filimu ya elastohydrodynamic (EHL) akusungidwa kuti alekanitse zinthu zozungulira ndi misewu ya mpikisano.

Mapangidwe a mabearing, zipata, ndi zipangizo za khola

Kuchotsa mkati mwa galimoto ndi chinthu chofunikira kwambiri pakupanga, makamaka pa ma mota amagetsi. Kuchotsa mkati mwa galimoto kuyenera kukhala ndi kutentha kwa shaft ndi mphete yamkati panthawi yogwira ntchito. Chifukwa chake, kuchotsa C3 (koposa nthawi zonse) ndiye muyezo wa ma bearing ambiri a injini zamafakitale, zomwe zimapangitsa kuti kutentha kukhale kosiyana pakati pa 10°C ndi 15°C pakati pa mphete zamkati ndi zakunja popanda kuwononga katundu.

Kusankha zinthu zogwiritsidwa ntchito m'khola kumawonjezera kuyenerera kwa bearing m'malo enaake. Ntchito zodziwika bwino nthawi zambiri zimagwiritsa ntchito makhola achitsulo osindikizidwa chifukwa cha kulimba kwawo komanso kugwiritsa ntchito bwino ndalama. Komabe, ntchito zothamanga kwambiri kapena zomwe zimafunama profiles a phokoso lochepaNthawi zambiri amagwiritsa ntchito ma cage a polyamide (PA66) opangidwa ndi galasi, omwe amapereka mphamvu zabwino zotsetsereka komanso kusinthasintha. Pa ntchito zolemera kapena zogwedezeka kwambiri, ma cage a mkuwa opangidwa ndi makina amapereka kapangidwe kabwino kwambiri, ngakhale kuti amaimira mtengo wokwera poyamba.

Zofunikira zoyerekeza mitundu yodziwika bwino ya ma bearing

Ma mota amagetsi nthawi zambiri amadalira mapangidwe osiyanasiyana a ma bearing kutengera kukula kwawo, momwe amakhalira, komanso njira yolumikizira. Kumvetsetsa mphamvu zofananira za mapangidwe awa ndikofunikira kwambiri pakukonza bwino malekezero a drive ndi osayendetsa a mota.

Ma bereji a mpira wozama kwambiriNdi chisankho chodziwika bwino cha magalimoto ang'onoang'ono mpaka apakatikati chifukwa cha kusinthasintha kwawo komanso luso lawo lothamanga kwambiri. Mabearing a cylindrical roller amasankhidwa kuti agwiritsidwe ntchito kumapeto kwa magalimoto akuluakulu omwe ali ndi katundu wolemera wa radial, monga malamba oyendetsera mafakitale. Mabearing a angular contact amafunika kwambiri pa magalimoto oyenda pansi pomwe magalimoto oyenda pansi ayenera kuthandizidwa ndi katundu wopitirira, wolemera wa axial thrust.

Momwe mungayerekezere zosankha za mabearing a mota

Kuyerekeza njira zoyendetsera mabearing kumafuna kuyang'ana kupitirira kuyanjana koyambira. Kusiyana kochepa kwa ukadaulo woteteza kutentha, magulu olondola, ndi zofunikira pakusamalira kwa nthawi yayitali kumatsimikizira phindu lenileni ndi magwiridwe antchito a gawo mkati mwa makina amafakitale.

Mabearing a Standard vs Insulated

Kuchulukana kwa ma motors opangidwa ndi inverter kwapangitsa kusankha pakati pa ma bearings okhazikika ndi otetezedwa kukhala chinthu chofunikira kwambiri. Ma bearings okhazikika achitsulo sapereka kukana kwa ma shaft currents opangidwa ndi VFD, zomwe zimapangitsa kuti azivutika kwambiri ndi flute komanso kulephera msanga mu ntchito zoyendetsedwa ndi inverter.

Ma bearing otetezedwa amachepetsa chiopsezochi kudzera mu ukadaulo waukulu uwiri. Ma bearing ophimbidwa ndi ceramic ali ndi aluminiyamu oxide layer (nthawi zambiri amakhala ndi makulidwe a 50 mpaka 100 µm) omwe amayikidwa pa mphete yakunja kapena yamkati, zomwe zimapangitsa kuti magetsi ocheperako a 1,000V DC awonongeke. Pa ma current amphamvu kwambiri, ma bearing osakanikirana omwe amagwiritsa ntchito zinthu zozungulira za silicon nitride (Si3N4) amatchulidwa. Ngakhale ma bearing osakanikirana amatha kukhala okwera mtengo ndi 300% mpaka 500% kuposa mitundu yokhazikika, kudzipatula kwawo kwamagetsi komanso kukana kwapamwamba kwa kuwonongeka kumapangitsa kuti akhale yankho lomveka bwino pa ntchito zofunika kwambiri za VFD.

Kulondola, phokoso, kugwedezeka, ndi kuyenerera

Miyezo yolondola imakhudza mwachindunji magwiridwe antchito a injini. Ma bearing amapangidwa malinga ndi magulu enaake olekerera, monga ISO P0 (Normal), P6, kapena P5, okhudzana ndi miyezo ya ABEC 1, 3, ndi 5. Ma bearing a khalidwe la injini yamagetsi (EMQ) amakonzedwa makamaka kuti akhale olimba kuti achepetse kuthamanga kwa magetsi ndikuwonetsetsa kuti ntchito ikuyenda bwino.

Phokoso ndi kugwedezeka zimawongoleredwanso kudzera mu njira zolimba zopangira. Ma bearing a mota nthawi zambiri amagawidwa m'magulu a kugwedezeka (monga, V1, V2, V3), pomwe V3 imayimira liwiro lotsika kwambiri la kugwedezeka. Kukwanira kwa shaft ndi nyumba yoyenera—nthawi zambiri kukhudzana ndi kusokoneza pa shaft yozungulira (monga, k5 kapena m5 tolerances) ndi kusintha kapena kumasuka mu nyumba yosasuntha (monga, H6 kapena J6)—ndizofunikira kuti tipewe dzimbiri pamene timalola kutentha kwa axial kukula.

Mtengo wa moyo wonse kupitirira mtengo wa unit

Zisankho zogula zomwe zimayendetsedwa ndi mtengo wa chinthu nthawi zambiri zimapangitsa kuti ndalama zogulira zinthu zikwere kwambiri. Chovala cholimba cha deep groove ball bearing chingakhale ndi mtengo wa chinthu cha $50, koma ntchito, zida zokonzera, ndi nthawi yotayika yopangira yomwe imafunika kuti isinthidwe ikhoza kupitirira $5,000 pa chochitika chilichonse.

Mainjiniya ayenera kuwunika Mtengo Wonse wa Umwini (TCO), womwe umaphatikizapo mtengo wa bearing, nthawi yomwe ikuyembekezeka ya L10h, nthawi yofunikira yowonjezerera mafuta, komanso mtengo wa nthawi yomwe ingagwire ntchito. Kuyika ndalama mu bearing yapamwamba kwambiri kapena sealed-for-life ndimafuta opangira apamwamba kwambirinthawi zambiri zimapindulitsa kwambiri pa ndalama zomwe zayikidwa mkati mwa zaka ziwiri zoyambirira za ntchito powonjezera nthawi yokonza kuyambira maola 4,000 mpaka maola opitilira 12,000.

Njira yosankha ndi kukhazikitsa

Njira yosankhira bwino iyenera kugwirizanitsidwa ndi kugwiritsa ntchito bwino. Ngakhale chivundikiro chapamwamba kwambiri chingalephereke msanga ngati chitayikidwa molakwika, kusungidwa kosakwanira, kapena kugwiritsa ntchito mafuta molakwika.

Njira yosankha sitepe ndi sitepe

Njira yosankha imayamba ndi kufotokoza magawo ogwiritsira ntchito: mphamvu ya injini, RPM, momwe zimakhalira, ndi mtundu wolumikizira. Kenako, mainjiniya amawerengera mphamvu yofanana ya ma bearing, poganizira kulemera kwa rotor ndi mphamvu zakunja monga kupsinjika kwa lamba. Deta iyi imagwiritsidwa ntchito kuwerengera nthawi yotopa ya L10h, yomwe imayang'ana muyeso wa makampani wa maola 40,000 mpaka 100,000 a ma motors ogwira ntchito mosalekeza.

Akangokhazikitsa kukula ndi mtundu wa bere loyambira, ntchito imayamba kusintha momwe zinthu zilili. Izi zikuphatikizapo kusankha malo oyenera olowera mkati (nthawi zambiri C3), kudziwa kufunikira kwa kutenthetsa magetsi, ndi kusankha mtundu woyenera wa mafuta ndi kuchuluka kwa mafuta kutengera kutentha ndi liwiro la ntchito.

Kukhazikitsa, kusunga, ndi njira zodzola mafuta

Njira zoyikira zimatengera thanzi loyambirira la bearing. Kuyika kozizira pogwiritsa ntchito makina osindikizira n'kovomerezeka pa mabearing ang'onoang'ono, koma kutentha kwa induction ndikofunikira kuti mphete zazikulu zamkati zigwirizane bwino. Bearing iyenera kutenthedwa kufika pafupifupi 90°C mpaka 110°C—osapitirira 120°C pa chitsulo chokhazikika—kuti ipewe kuwonongeka kwa zitsulo.

Malo osungiramo zinthu amakhudzanso kulimba kwa mabearing. Mabearing ayenera kusungidwa m'mapaketi awo oyambirira, osatsegulidwa pamalo olamulidwa ndi nyengo ndi chinyezi chochepera 60% kuti apewe dzimbiri. Mukalongedza bearing yotseguka, kuchuluka kwa mafuta ndikofunikira kwambiri; pa ma mota amagetsi, kudzaza 30% mpaka 50% ya malo omasuka ndi koyenera. Kupaka mafuta mopitirira muyeso kumayambitsa kugwedezeka, kutentha kwambiri, komanso kulephera kwa mafuta msanga.

Kuyang'anira ndi kukonza momwe zinthu zilili

Yogwira Ntchitokuyang'anira momwe zinthu zililindikofunikira kwambiri pakukulitsa moyo wa ma bearing ndikupewa kuzimitsa kosakonzekera. Kusanthula kwa kugwedezeka ndiye chida chachikulu chodziwira matenda, pogwiritsa ntchito ma accelerometer kuti azindikire zolakwika za ma bearing mu gawo loyambirira (mtundu wamkati, mtundu wakunja, kapena zolakwika za zinthu zozungulira) kudzera mu njira zolumikizira mwachangu. Miyezo ya ISO 10816 imapereka malangizo a kugwedezeka kovomerezeka kwa mota, nthawi zambiri kumafuna milingo ya RMS yochepera 1.12 mm/s mpaka 2.8 mm/s, kutengera mtundu wa mota ndi kulimba kwa kuyiyika.

Kuyesa kutulutsa kwa mawu ndi kuyang'anira ma ultrasound kumatha kuzindikira kukangana kwapamwamba komwe kumasonyeza kuti mafuta sali bwino nthawi yayitali zinthu zisanagwedezeke. Kusamalira nthawi zonse kuyenera kuphatikizapo njira zodzoladzola bwino, pogwiritsa ntchito mtundu woyenera wa mafuta ndi kuchuluka kwake nthawi ndi nthawi zowerengedwa. Magulu okonza ayeneranso kupewa kusakaniza zokhuthala zamafuta zosagwirizana (monga polyurea ndi lithium complex), zomwe zimapangitsa kuti mafutawo akhale olimba kwambiri kapena asungunuke.

Momwe mungayesere ogulitsa ndikusankha komaliza

Gawo lomaliza la kufotokozera za ma bearing limaphatikizapo kuwunikanso unyolo wogulira. Kupeza ma bearing a mafakitale kumafuna kugwirizana ndiopanga ndi ogulitsawokhoza kupereka khalidwe lokhazikika la zitsulo, deta yotsimikizika ya uinjiniya, komanso njira zodalirika zoyendetsera zinthu.

Ziyeneretso za ogulitsa ndi zolemba zabwino

Ziyeneretso za ogulitsa ziyenera kukhazikika pa miyezo yokhwima yoyendetsera khalidwe. Opanga ma bearing a Tier-one amagwira ntchito motsatira ziphaso za ISO 9001 ndi IATF 16949, kuonetsetsa kuti njira zonse zikuyenda bwino. Ogula ayenera kufunsa zikalata zonse zabwino, kuphatikizapo ziphaso za EN 10204 3.1, kuti atsimikizire ukhondo wa zitsulo ndi kapangidwe kake ka mankhwala.

Mitengo ya zolakwika ndi muyeso wofunikira kwambiri poyesa luso la ogulitsa. Ogulitsa ma bearing apamwamba a mafakitale nthawi zambiri amakhala ndi kuchuluka kwa zolakwika pansi pa 50 Parts Per Million (PPM). Kuphatikiza apo, ogulitsa ayenera kuwonetsa njira zolimba zopewera zabodza, chifukwa ma bearing abodza omwe amayambitsidwa kudzera munjira zosaloledwa amaika pachiwopsezo chachikulu cha chitetezo ndi kudalirika pantchito zamafakitale.

Ndondomeko yosankha zoyenera zaukadaulo, nthawi yotsogolera, ndi mtengo

Kusankha wogulitsa womaliza kumafuna kulinganiza bwino ukadaulo ndi zenizeni zamalonda. Chithandizo chaukadaulo wa mapulogalamu ndi chinthu chofunikira kwambiri pakusiyanitsa ukadaulo; ogulitsa omwe angapereke kusanthula kwapamwamba kwa zinthu zocheperako (FEA) ndi malingaliro odzola omwe amapangidwira amawonjezera phindu lalikulu kuposa chinthu chenicheni.

Nthawi yotsogolera imakhudza kwambiri matrix yomaliza ya zisankho.

Mfundo Zofunika Kwambiri

• Zomaliza zofunika kwambiri ndi zifukwa zomveka za ma bereki a magalimoto
• 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

Ndi mtundu uti wa bere lomwe limagwiritsidwa ntchito kwambiri pa ntchito zamagalimoto zamafakitale?

Ma bearing a mpira wa deep groove ndi omwe amasankhidwa kwambiri pa ma mota amagetsi chifukwa amatha kuyendetsa bwino liwiro lapamwamba, phokoso lochepa, komanso katundu wocheperako wa radial/axial.

Kodi ndiyenera kusankha liti chilolezo cha C3 pa injini?

Gwiritsani ntchito C3 clearance m'ma injini ambiri a mafakitale komwe kutentha kwa shaft kumakulitsa mphete yamkati. Zimathandiza kupewa kudzaza mafuta ndi kutentha kwambiri panthawi yogwira ntchito mosalekeza.

Kodi ma VFD amakhudza bwanji kusankha ma bearing a mota?

Ma mota oyendetsedwa ndi VFD angafunike ma bearing a ceramic otetezedwa kapena osakanikirana kuti achepetse kuwonongeka kwa magetsi. Izi ndizofunikira kwambiri pazida zothamanga kwambiri kapena zofunikira kwambiri.

Ndi zinthu ziti zomwe zimafunika kwambiri posankha chotengera cha mota?

Yang'anani katundu, liwiro, kutentha kwa ntchito, kuchuluka kwa kuipitsidwa, njira yothira mafuta, komanso ngati injiniyo imagwiritsa ntchito VFD. Izi zimatsimikizira mtundu wa bearing, malo otseguka, zisindikizo, ndi zinthu za khola.

Kodi DEMY Bearings ingathandize OEMs ndi ogula mafakitale kupeza ma motor bearings oyenera?

Inde. DEMY Bearings imapereka ma bearing osiyanasiyana a mota ndi chithandizo cha e-catalog, kuthandiza ma OEM ndi ogulitsa kuti agwirizane ndi zofunikira za liwiro, katundu, phokoso, ndi moyo wautumiki.