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Chifukwa cha ndalama zogwirira ntchito komanso moyo wautali wa injini, njira yoyenera yoyendetsera injini ndi yofunika kwambiri.Nkhaniyi yapanga njira yoyendetsera kutentha kwa ma induction motors kuti ikhale yolimba komanso kuti ikhale yabwino.Kuonjezera apo, kufufuza kwakukulu kwa mabuku okhudza njira zoziziritsira injini kunachitidwa.Chotsatira chake chachikulu, kuwerengera kutentha kwa injini yamphamvu yamphamvu ya air-cooled asynchronous imaperekedwa, poganizira vuto lodziwika bwino la kugawa kutentha.Kuphatikiza apo, phunziroli likupereka njira yophatikizira yokhala ndi njira ziwiri kapena zingapo zoziziritsira kuti zikwaniritse zosowa zapano.Kafukufuku wamawerengero amtundu wa 100 kW woziziritsidwa ndi mpweya woziziritsa mpweya komanso mtundu wowongolera kutentha wa injini yomweyi, pomwe kuwonjezereka kwamphamvu kwamagalimoto kumatheka kudzera pakuphatikiza kuziziritsa kwa mpweya ndi makina oziziritsira madzi ophatikizika. zidachitidwa.Makina ophatikizika oziziritsa mpweya komanso oziziritsa madzi adaphunziridwa pogwiritsa ntchito mitundu ya SolidWorks 2017 ndi ANSYS Fluent 2021.Mayendedwe atatu osiyanasiyana amadzi (5 L / min, 10 L / min, ndi 15 L / min) adawunikidwa motsutsana ndi ma motors okhazikika oziziritsidwa ndi mpweya ndikutsimikiziridwa pogwiritsa ntchito zida zofalitsidwa zomwe zilipo.Kusanthula kukuwonetsa kuti pamitengo yosiyana (5 L / min, 10 L / min ndi 15 L / min motsatira) tinapeza kuchepetsa kutentha kwa 2.94%, 4.79% ndi 7.69%.Chifukwa chake, zotsatira zake zikuwonetsa kuti injini yophatikizira yophatikizidwa imatha kuchepetsa kutentha poyerekeza ndi mota yoziziritsa mpweya.
Galimoto yamagetsi ndi imodzi mwazinthu zazikulu zopanga sayansi yamakono.Ma motors amagetsi amagwiritsidwa ntchito m'chilichonse kuyambira pazida zam'nyumba kupita pamagalimoto, kuphatikiza mafakitale amagalimoto ndi ndege.M'zaka zaposachedwa, kutchuka kwa ma induction motors (AM) kwawonjezeka chifukwa cha torque yawo yoyambira, kuyendetsa bwino liwiro komanso kuchuluka kwapang'onopang'ono (mkuyu 1).Ma motor induction sikuti amangopangitsa kuti mababu anu aziwala, amathandizira zida zambiri m'nyumba mwanu, kuyambira kasuwachi mpaka ku Tesla yanu.Mphamvu zamakina mu IM zimapangidwa ndi kukhudzana kwa maginito a stator ndi ma rotor windings.Kuphatikiza apo, IM ndi njira yotheka chifukwa cha kuchepa kwazitsulo zapadziko lapansi.Komabe, choyipa chachikulu cha ma AD ndikuti nthawi yamoyo wawo komanso magwiridwe antchito amakhudzidwa kwambiri ndi kutentha.Ma motor induction amadya pafupifupi 40% yamagetsi apadziko lonse lapansi, zomwe ziyenera kutipangitsa kuganiza kuti kuyang'anira kugwiritsa ntchito mphamvu zamakinawa ndikofunikira.
Arrhenius equation imanena kuti pa 10 ° C pakakwera kutentha kwa ntchito, moyo wa injini yonse umachepetsedwa ndi theka.Choncho, kuonetsetsa kudalirika ndi kuonjezera zokolola za makina, m'pofunika kulabadira kulamulira matenthedwe kuthamanga kwa magazi.M'mbuyomu, kusanthula matenthedwe sikunanyalanyazidwe ndipo opanga magalimoto amangoganizira za vutoli pongoyang'ana m'mphepete mwake, kutengera zomwe zidachitika pamapangidwe kapena zosintha zina zofananira, monga kachulukidwe kakali pano, ndi zina. Kutentha kwamilandu, zomwe zimabweretsa kuwonjezeka kwa kukula kwa makina komanso chifukwa chake kuchuluka kwa mtengo.
Pali mitundu iwiri ya kusanthula kutentha: kusanthula dera la lumped ndi njira zamawerengero.Ubwino waukulu wa njira zowunikira ndikutha kuwerengera mwachangu komanso molondola.Komabe, kuyesayesa kwakukulu kuyenera kupangidwa kutanthauzira mabwalo olondola mokwanira kuti afanizire njira zowotcha.Kumbali ina, njira zamawerengero zimagawika pafupifupi kukhala ma computational fluid dynamics (CFD) ndi structural thermal analysis (STA), onse omwe amagwiritsa ntchito finite element analysis (FEA).Ubwino wa kusanthula manambala ndikuti umakupatsani mwayi wotengera geometry ya chipangizocho.Komabe, kukhazikitsa dongosolo ndi kuwerengera nthawi zina kumakhala kovuta.Zolemba zasayansi zomwe zafotokozedwa pansipa ndi zitsanzo zosankhidwa za kusanthula kwamafuta ndi ma electromagnetic amitundu yosiyanasiyana yamakono yolowetsa.Zolembazi zidapangitsa olembawo kuti aphunzire zochitika zamatenthedwe mu ma asynchronous motors ndi njira zoziziritsira.
Pil-Wan Han1 adachita nawo kusanthula kwamafuta ndi ma elekitiroma a MI.Njira yowunikira ma lumped circuit imagwiritsidwa ntchito pakuwunika kwamafuta, ndipo njira yosinthira nthawi ya maginito yamalire imagwiritsidwa ntchito pakuwunika kwamagetsi.Kuti mupereke chitetezo chokwanira chamafuta pamafakitale aliwonse, kutentha kwa mafunde a stator kuyenera kuwerengedwa modalirika.Ahmed et al.2 anakonza chitsanzo chapamwamba cha kutentha kwapaintaneti kutengera kuzama kwa kutentha ndi kutentha kwa thermodynamic.Kupanga njira zowonetsera kutentha kwa mafakitale otetezera kutentha kumapindula ndi mayankho owunikira ndikuganizira magawo a kutentha.
Nair et al.3 adagwiritsa ntchito kusanthula kophatikizana kwa 39 kW IM ndi kusanthula kwachiwerengero cha 3D kuneneratu kugawa kwamafuta mu makina amagetsi.Ying et al.4 adasanthula ma IM oziziritsidwa bwino (TEFC) okhala ndi kuyerekezera kwa kutentha kwa 3D.Moon et al.5 idaphunzira za kutentha kwa IM TEFC pogwiritsa ntchito CFD.Mtundu wa kusintha kwa injini ya LPTN unaperekedwa ndi Todd et al.6.Deta yoyesera yoyesera imagwiritsidwa ntchito limodzi ndi kutentha kowerengeredwa kochokera ku mtundu womwe waperekedwa wa LPTN.Peter et al.7 anagwiritsa ntchito CFD kuti aphunzire kayendedwe ka mpweya komwe kumakhudza khalidwe la kutentha kwa ma motors amagetsi.
Cabral et al8 adapereka chitsanzo chosavuta cha IM chotenthetsera momwe kutentha kwa makina kunapezedwa pogwiritsa ntchito cylinder heat diffusion equation.Nategh et al.9 adaphunzira makina opangira mpweya wodziyendetsa okha pogwiritsa ntchito CFD kuyesa kulondola kwa zida zokongoletsedwa.Chifukwa chake, maphunziro a manambala ndi oyesera angagwiritsidwe ntchito kutengera kusanthula kwamafuta kwa ma induction motors, onani mkuyu.2.
Yinye et al.10 adakonza zopanga kuti apititse patsogolo kasamalidwe ka matenthedwe pogwiritsa ntchito zinthu zomwe zimatenthedwa ndi zinthu wamba komanso magwero omwe amatayika gawo la makina.Marco et al.11 adapereka njira zopangira makina ozizirira ndi ma jekete amadzi azigawo zamakina pogwiritsa ntchito mitundu ya CFD ndi LPTN.Yaohui et al.12 amapereka malangizo osiyanasiyana posankha njira yoyenera yozizirira ndikuwunika momwe ntchito ikuyendera kumayambiriro kwa kamangidwe.Nell et al.13 akufuna kuti agwiritse ntchito zitsanzo zofananira ndi ma elekitiromagineti-matenthedwe amtundu wazinthu zomwe zaperekedwa, kuchuluka kwatsatanetsatane komanso mphamvu yowerengera pavuto lamitundu ingapo.Jean et al.14 ndi Kim et al.15 adaphunzira za kugawa kwa kutentha kwa injini yopangira mpweya wozizira pogwiritsa ntchito gawo la 3D lophatikizidwa la FEM.Werengetsani zomwe zalowetsedwa pogwiritsa ntchito 3D eddy kusanthula komwe kulipo pano kuti mupeze zotayika za Joule ndikuzigwiritsa ntchito posanthula kutentha.
Michel et al.16 anayerekezera mafani oziziritsa a centrifugal ndi ma axial mafani amitundu yosiyanasiyana kudzera muzoyerekeza ndi zoyesera.Chimodzi mwazojambulazi chinapindula pang'ono koma kwakukulu pakuchita bwino kwa injini ndikusunga kutentha komweko.
Lu et al.17 adagwiritsa ntchito njira yofananira ndi maginito ophatikizika ndi mtundu wa Boglietti kuyerekeza kutayika kwachitsulo pa shaft ya injini yolowera.Olembawo amaganiza kuti kugawa kwa maginito kachulukidwe ka maginito mu gawo lililonse la mtanda mkati mwa injini ya spindle ndi yunifolomu.Anayerekeza njira yawo ndi zotsatira za kusanthula kwazinthu zomaliza ndi zitsanzo zoyesera.Njirayi ingagwiritsidwe ntchito pofufuza momveka bwino MI, koma kulondola kwake kuli kochepa.
18 ikupereka njira zosiyanasiyana zowunikira gawo lamagetsi lamagetsi amagetsi opangira ma linear induction motors.Zina mwa izo, njira zoyezera kutayika kwa mphamvu mu njanji zokhazikika komanso njira zolosera kukwera kwa kutentha kwa ma traction linear induction motors akufotokozedwa.Njirazi zitha kugwiritsidwa ntchito kupititsa patsogolo kusinthika kwamphamvu kwa ma motors induction motors.
Zabdur et al.19 idafufuza momwe ma jekete ozizira amagwirira ntchito pogwiritsa ntchito njira ya manambala atatu.Jekete yozizirira imagwiritsa ntchito madzi ngati gwero lalikulu la zoziziritsa kukhosi kwa magawo atatu a IM, omwe ndi ofunikira mphamvu komanso kutentha kwakukulu komwe kumafunikira popopera.Rippel et al.20 ali ndi chilolezo cha njira yatsopano yoziziritsira madzi yotchedwa transverse laminated kuzirala, momwe refrigerant imadutsa modutsa m'madera opapatiza opangidwa ndi mabowo amtundu wina ndi mnzake maginito.Deriszade et al.21 adafufuza moyeserera kuzirala kwa ma traction motors mumsika wamagalimoto pogwiritsa ntchito osakaniza a ethylene glycol ndi madzi.Unikani magwiridwe antchito osiyanasiyana osakanikirana ndi CFD ndi 3D turbulent fluid kusanthula.Kafukufuku woyerekeza ndi Boopathi et al.22 anasonyeza kuti kutentha kwa injini zoziziritsa madzi (17-124 ° C) ndizochepa kwambiri kusiyana ndi injini zowonongeka ndi mpweya (104-250 ° C).Kutentha kwakukulu kwa galimoto ya aluminiyamu yamadzi ozizira kumachepetsedwa ndi 50.4%, ndipo kutentha kwakukulu kwa PA6GF30 injini yamadzi ozizira kumachepetsedwa ndi 48.4%.Bezukov et al.23 adawunika momwe mapangidwe a masikelo amayendera pakhoma la injini ndi njira yozizirira yamadzimadzi.Kafukufuku wasonyeza kuti 1.5 mm wandiweyani oxide filimu amachepetsa kutentha kutentha ndi 30%, kumawonjezera mafuta ndi kuchepetsa mphamvu injini.
Tanguy et al.24 adayesa kuyesa kosiyanasiyana kosiyanasiyana, kutentha kwamafuta, liwiro lozungulira komanso ma jakisoni amagetsi amagetsi pogwiritsa ntchito mafuta opaka ngati choziziritsa.Ubale wamphamvu wakhazikitsidwa pakati pa kuthamanga kwa kuthamanga ndi kuzizira kwathunthu.Ha et al.25 adanenanso kuti agwiritse ntchito milomo yodontha ngati mipumi kuti agawane filimu yamafuta mofanana ndikuwonjezera kuziziritsa kwa injini.
Nandi et al.26 anasanthula zotsatira za mapaipi otentha a L oboola pakati pa injini ndi kasamalidwe ka matenthedwe.Gawo la evaporator la kutentha limayikidwa mu casing yamoto kapena kukwiriridwa mu shaft yamoto, ndipo gawo la condenser limayikidwa ndikuzizidwa ndi madzi ozungulira kapena mpweya.Bellettre et al.27 adaphunzira makina ozizirira a PCM olimba amadzimadzi amtundu wanthawi yayitali.PCM imalowetsa mitu yokhotakhota, kutsitsa kutentha kwa malo otentha posunga mphamvu zotentha zobisika.
Chifukwa chake, magwiridwe antchito amagalimoto ndi kutentha zimawunikidwa pogwiritsa ntchito njira zosiyanasiyana zoziziritsira, onani mkuyu.3. Mabwalo ozizirawa amapangidwa kuti aziwongolera kutentha kwa ma windings, mbale, mitu yokhotakhota, maginito, nyama ndi mapepala omalizira.
Njira zoziziritsira zamadzimadzi zimadziwika chifukwa chotengera kutentha kwabwino.Komabe, kupopera koziziritsa kuzungulira injini kumawononga mphamvu zambiri, zomwe zimachepetsa mphamvu ya injini.Njira zoziziritsira mpweya, kumbali inayo, ndi njira yogwiritsidwa ntchito kwambiri chifukwa cha mtengo wake wotsika komanso kuwongolera kosavuta.Komabe, imakhalabe yocheperako kuposa machitidwe ozizirira amadzimadzi.Njira yophatikizira ndiyofunika yomwe ingaphatikizepo kutentha kwakukulu kwa kayendedwe ka madzi ozizira ndi mtengo wotsika wa mpweya wozizira popanda kugwiritsa ntchito mphamvu zowonjezera.
Nkhaniyi ikulemba ndikuwunika kutayika kwa kutentha mu AD.Njira ya vutoli, komanso kutentha ndi kuziziritsa kwa ma induction motors, ikufotokozedwa mu gawo la Kutayika kwa Kutentha mu Induction Motors kudzera mu Njira Zozizira.Kutaya kwa kutentha kwapakati pa induction motor kumasinthidwa kukhala kutentha.Chifukwa chake, nkhaniyi ikufotokoza momwe amasinthira kutentha mkati mwa injini poyendetsa ndi kukakamiza.Matenthedwe amtundu wa IM pogwiritsa ntchito ma equation opitilira, Navier-Stokes/momentum equations ndi mphamvu equations akuti.Ofufuzawo adachita kafukufuku wowunikira komanso wowerengera matenthedwe a IM kuti ayerekeze kutentha kwa ma stator windings ndi cholinga chokha chowongolera kutenthetsa kwa mota yamagetsi.Nkhaniyi ikuyang'ana pa kusanthula kwa kutentha kwa ma IM oziziritsidwa ndi mpweya ndi kusanthula kwa kutentha kwa ma IM ophatikizidwa ndi mpweya wozizira ndi madzi pogwiritsa ntchito CAD modeling ndi ANSYS Fluent simulation.Ndipo ubwino wotentha wa chitsanzo chophatikizidwa bwino cha machitidwe oziziritsidwa ndi mpweya ndi madzi amawunikidwa mozama.Monga tafotokozera pamwambapa, zolemba zomwe zalembedwa pano siziri chidule cha momwe zinthu zilili pazochitika zamatenthedwe komanso kuziziritsa kwa ma induction motors, koma zikuwonetsa mavuto ambiri omwe akuyenera kuthetsedwa kuti atsimikizire kugwira ntchito kodalirika kwa ma induction motors. .
Kutayika kwa kutentha kumagawanika kukhala kutayika kwa mkuwa, kutaya chitsulo ndi kukangana / kutaya makina.
Kutayika kwa mkuwa ndi chifukwa cha kutentha kwa Joule chifukwa cha kusagwirizana kwa woyendetsa ndipo akhoza kuwerengedwa ngati 10.28:
kumene q̇g ndi kutentha kwaiye, Ine ndi Ve ndi mwadzina panopa ndi voteji, motero, ndipo Re ndi kukana mkuwa.
Kutayika kwachitsulo, komwe kumadziwikanso kuti kutayika kwa parasitic, ndi mtundu wachiwiri waukulu wa kutayika komwe kumayambitsa hysteresis ndi eddy kutayika panopa mu AM, makamaka chifukwa cha nthawi yosiyana ya maginito.Amawerengedwa ndi equation yowonjezera ya Steinmetz, yomwe ma coefficients ake amatha kuonedwa ngati osasintha kapena osinthika malinga ndi momwe amagwirira ntchito10,28,29.
kumene Khn ndi hysteresis loss factor yochokera ku core loss diagram, Ken ndi eddy current loss factor, N ndi harmonic index, Bn ndi f ndi pachimake flux kachulukidwe ndi pafupipafupi osakhala sinusoidal excitation, motero.Equation yomwe ili pamwambayi ingakhale yophweka motere10,29:
Pakati pawo, K1 ndi K2 ndizomwe zimatayika kwambiri komanso kutaya kwa eddy panopa (qec), kutaya kwa hysteresis (qh), ndi kutaya kwakukulu (qex), motsatira.
Kuwonongeka kwa mphepo ndi kuwonongeka kwa mikangano ndizomwe zimayambitsa kutayika kwamakina mu IM.Kuwonongeka kwa mphepo ndi kukangana ndi 10,
Mu formula, n ndi liwiro lozungulira, Kfb ndi coefficient of friction loss, D ndi m'mimba mwake wakunja kwa rotor, l kutalika kwa rotor, G - kulemera kwa rotor 10.
Njira yayikulu yosinthira kutentha mkati mwa injini ndikuyendetsa ndi kutenthetsa mkati, monga momwe Poisson equation30 imagwiritsidwira ntchito pa chitsanzo ichi:
Panthawi yogwira ntchito, patatha nthawi inayake pamene galimotoyo ifika pamtunda wokhazikika, kutentha komwe kumachokera kungathe kuyerekezedwa ndi kutentha kosalekeza kwa kutentha kwapamwamba.Choncho, tingaganize kuti conduction mkati mwa injini ikuchitika ndi kutuluka kwa kutentha kwa mkati.
Kutentha kwa kutentha pakati pa zipsepse ndi malo ozungulira kumaonedwa kuti ndi kukakamiza, pamene madzimadzi amakakamizika kusuntha njira inayake ndi mphamvu yakunja.Convection ikhoza kufotokozedwa ngati 30:
kumene h ndi kutentha kwapakati (W / m2 K), A ndi malo, ndipo ΔT ndi kusiyana kwa kutentha pakati pa kutentha kwa kutentha ndi refrigerant perpendicular pamwamba.Nambala ya Nusselt (Nu) ndi muyeso wa chiŵerengero cha kutentha kwa convective ndi conductive kutentha kwa malire ndipo amasankhidwa kutengera mawonekedwe a laminar ndi kutuluka kwa chipwirikiti.Malinga ndi njira yoyeserera, kuchuluka kwa chipwirikiti kwa Nusselt nthawi zambiri kumalumikizidwa ndi nambala ya Reynolds ndi nambala ya Prandtl, yofotokozedwa ngati 30:
pamene h ndi convective heat transfer coefficient (W/m2 K), l ndiye kutalika kwake, λ ndi matenthedwe amadzimadzi (W/m K), ndipo nambala ya Prandtl (Pr) ndi muyeso wa chiŵerengero cha kuchuluka kwamphamvu kwa kufalikira kwamafuta (kapena kuthamanga ndi makulidwe amtundu wa malire amafuta), otanthauzidwa kuti 30:
pomwe k ndi cp ndizomwe zimapangidwira komanso kutentha kwamadzimadzi, motsatana.Nthawi zambiri, mpweya ndi madzi ndizomwe zimazizira kwambiri pamagalimoto amagetsi.Mphamvu zamadzimadzi za mpweya ndi madzi pa kutentha kozungulira zikuwonetsedwa mu Table 1.
IM thermal modeling imachokera paziganizo zotsatirazi: 3D yokhazikika, kutuluka kwa chipwirikiti, mpweya ndi mpweya wabwino, kuwala kopanda kanthu, Newtonian fluid, incompressible fluid, chikhalidwe chosasunthika, ndi katundu wokhazikika.Chifukwa chake, ma equation otsatirawa amagwiritsidwa ntchito kukwaniritsa malamulo osungira misa, kuthamanga, ndi mphamvu m'chigawo chamadzimadzi.
Nthawi zambiri, equation yosunga misa ndi yofanana ndi kuchuluka kwa ukonde kumalowa mu selo ndi madzi, kutsimikiziridwa ndi chilinganizo:
Malinga ndi lamulo lachiwiri la Newton, kuchuluka kwa kusintha kwamphamvu kwa tinthu tamadzi timafanana ndi kuchuluka kwa mphamvu zomwe zikugwirapo, ndipo general momentum Conservation equation ikhoza kulembedwa mu mawonekedwe a vector monga:
Mawu akuti ∇p, ∇∙τij, ndi ρg mu equation yomwe ili pamwambapa ikuyimira kupanikizika, kukhuthala, ndi mphamvu yokoka, motsatana.Zida zoziziritsira (mpweya, madzi, mafuta, ndi zina zotero) zomwe zimagwiritsidwa ntchito ngati zoziziritsa m'makina nthawi zambiri zimatengedwa ngati za Newtonian.Ma equation omwe akuwonetsedwa apa akungophatikiza mgwirizano wa mzere pakati pa kumeta ubweya wa ubweya ndi liwiro la kuthamanga (kusemphana) motsatana ndi kukameta ubweya.Poganizira kukhuthala kosalekeza komanso kuyenda kosasunthika, equation (12) ikhoza kusinthidwa kukhala 31:
Malinga ndi lamulo loyamba la thermodynamics, kuchuluka kwa kusintha kwa mphamvu ya tinthu tamadzi timafanana ndi kuchuluka kwa kutentha kwa ukonde komwe kumapangidwa ndi tinthu tamadzi ndi mphamvu ya ukonde wopangidwa ndi tinthu tamadzi.Pakutuluka kwa viscous kwa Newtonian, equation yosungira mphamvu imatha kufotokozedwa ngati31:
pamene Cp ndi mphamvu ya kutentha pa kukanikiza kosalekeza, ndipo mawu akuti ∇ ∙ (k∇T) amagwirizana ndi matenthedwe matenthedwe kudzera m'malire a cell amadzimadzi, pomwe k amatanthauza kusinthasintha kwamafuta.Kutembenuka kwa mphamvu yamakina kukhala kutentha kumaganiziridwa molingana ndi \(\varnothing\) (ie, viscous dissipation function) ndipo imatanthauzidwa ngati:
Kumene \ (\ rho \) ndi kachulukidwe ka madzi, \ (\ mu\) ndi viscosity yamadzimadzi, u, v ndi w ndi kuthekera kwa njira x, y, z ya liwiro lamadzimadzi, motero.Mawuwa amafotokoza kutembenuka kwa mphamvu yamakina kukhala mphamvu yotentha ndipo imatha kunyalanyazidwa chifukwa ndikofunikira kokha pamene kukhuthala kwamadzimadzi kumakhala kwakukulu kwambiri komanso kuthamanga kwamadzimadzi kumakhala kwakukulu kwambiri.Pankhani yakuyenda kosasunthika, kutentha kwanthawi zonse ndi matenthedwe matenthedwe, mphamvu ya equation imasinthidwa motere:
Ma equation oyambira awa amathetsedwa pakuyenda kwa laminar mu Cartesian coordinate system.Komabe, monga mavuto ena ambiri aukadaulo, kugwiritsa ntchito makina amagetsi kumalumikizidwa makamaka ndi kuyenda kwa chipwirikiti.Chifukwa chake, ma equations awa amasinthidwa kuti apange njira yochepetsera ya Reynolds Navier-Stokes (RANS) yopangira chipwirikiti.
Mu ntchitoyi, pulogalamu ya ANSYS FLUENT 2021 ya CFD yofananira ndi malire ofananira idasankhidwa, monga chitsanzo chomwe chimaganiziridwa: injini ya asynchronous yokhala ndi mpweya wozizira wokhala ndi mphamvu ya 100 kW, kuzungulira kwa rotor 80.80 mm, m'mimba mwake. wa stator 83.56 mm (mkati) ndi 190 mm (kunja), mpweya kusiyana 1.38 mm, okwana kutalika 234 mm, kuchuluka , makulidwe a nthiti 3 mm..
Injini ya SolidWorks yoziziritsidwa ndi mpweya imatumizidwa ku ANSYS Momveka bwino ndikufaniziridwa.Kuphatikiza apo, zotsatira zomwe zapezedwa zimafufuzidwa kuti zitsimikizire kulondola kwa kayeseleledwe kochitidwa.Kuphatikiza apo, IM yophatikizidwa ndi mpweya ndi madzi idapangidwa pogwiritsa ntchito pulogalamu ya SolidWorks 2017 ndikuyeseza pogwiritsa ntchito pulogalamu ya ANSYS Fluent 2021 (Chithunzi 4).
Mapangidwe ndi miyeso ya chitsanzo ichi amalimbikitsidwa ndi mndandanda wa aluminium wa Siemens 1LA9 ndipo amatsatiridwa mu SolidWorks 2017. Chitsanzochi chasinthidwa pang'ono kuti chigwirizane ndi zosowa za pulogalamu yowonetsera.Sinthani mitundu ya CAD pochotsa magawo osafunikira, kuchotsa ma fillet, ma chamfers, ndi zina zambiri mukamatengera ANSYS Workbench 2021.
Kupanga zatsopano ndi jekete lamadzi, kutalika kwake komwe kunatsimikiziridwa kuchokera ku zotsatira zofananira za chitsanzo choyamba.Zosintha zina zapangidwira kuyerekezera kwa jekete lamadzi kuti mupeze zotsatira zabwino mukamagwiritsa ntchito m'chiuno mu ANSYS.Magawo osiyanasiyana a IM akuwonetsedwa mkuyu.5a–f.
(A).Rotor core ndi IM shaft.(b) IM stator pachimake.(c) Mapiritsi a IM stator.(d) Chithunzi chakunja cha MI.(e) Jekete lamadzi la IM.f) kuphatikiza mitundu ya IM yoziziritsa mpweya ndi madzi.
Chophimba chokwera mtengo chimapereka mpweya wokhazikika wa 10 m / s ndi kutentha kwa 30 ° C pamwamba pa zipsepse.Mtengo wa mlingo umasankhidwa mwachisawawa malinga ndi mphamvu ya kuthamanga kwa magazi yomwe ikufufuzidwa m'nkhaniyi, yomwe ndi yaikulu kuposa yomwe ikuwonetsedwa m'mabuku.Malo otentha akuphatikizapo rotor, stator, stator windings ndi rotor khola mipiringidzo.Zida za stator ndi rotor ndi zitsulo, ma windings ndi khola ndodo ndi mkuwa, chimango ndi nthiti ndi aluminiyamu.Kutentha komwe kumapangidwa m'maderawa kumachitika chifukwa cha zochitika zamagetsi, monga kutentha kwa Joule pamene mpweya wakunja umadutsa muzitsulo zamkuwa, komanso kusintha kwa maginito.Kutentha kwa kutentha kwa zigawo zosiyanasiyana kunatengedwa m'mabuku osiyanasiyana omwe alipo 100 kW IM.
Ma IM ophatikizika a mpweya wozizira komanso wothira madzi, kuphatikiza pazimenezi, adaphatikizanso jekete lamadzi, momwe mphamvu zotumizira kutentha ndi zofunikira zamphamvu zapampu zidawunikidwa pamitengo yosiyanasiyana yamadzi (5 l / min, 10 l / min. ndi 15 l/mphindi).Valve iyi idasankhidwa ngati valavu yocheperako, popeza zotsatira zake sizinasinthe kwambiri pakuyenda pansi pa 5 L / min.Kuonjezera apo, kuthamanga kwa 15 L / min kunasankhidwa kukhala mtengo wapatali, popeza mphamvu yopopera inakula kwambiri ngakhale kuti kutentha kunapitirizabe kugwa.
Mitundu yosiyanasiyana ya IM idatumizidwa ku ANSYS Fluent ndikusinthidwanso pogwiritsa ntchito ANSYS Design Modeler.Komanso, bokosi lopangidwa ndi bokosi lokhala ndi miyeso ya 0.3 × 0.3 × 0.5 m linamangidwa mozungulira AD kuti lifufuze kayendetsedwe ka mpweya mozungulira injini ndikuphunzira kuchotsa kutentha mumlengalenga.Kusanthula kofananako kunachitika kwa ma IM ophatikizidwa ndi mpweya ndi madzi.
Mtundu wa IM umapangidwa pogwiritsa ntchito njira za manambala za CFD ndi FEM.Ma meshes amamangidwa mu CFD kuti agawane madambwe mumagulu angapo kuti apeze yankho.Ma meshes a Tetrahedral okhala ndi kukula koyenera amagwiritsidwa ntchito popanga ma geometry ovuta a zigawo za injini.Mawonekedwe onse adadzazidwa ndi zigawo za 10 kuti apeze zotsatira zolondola za kutentha kwapamwamba.Geometry ya gridi yamitundu iwiri ya MI ikuwonetsedwa mkuyu.6a, b.
Mphamvu equation imakulolani kuti muphunzire kutengerapo kutentha m'malo osiyanasiyana a injini.Mtundu wa chipwirikiti wa K-epsilon wokhala ndi magwiridwe antchito wamba adasankhidwa kuti awonetse chipwirikiti kuzungulira kunja.Chitsanzocho chimaganizira mphamvu ya kinetic (Ek) ndi kutayika kwachisokonezo (epsilon).Copper, aluminiyamu, zitsulo, mpweya ndi madzi zinasankhidwa kuti zigwiritsidwe ntchito pazochitika zawo.Kutentha kwa kutentha (onani Table 2) kumaperekedwa ngati zolowetsa, ndipo mikhalidwe yosiyana ya batri imayikidwa ku 15, 17, 28, 32. Kuthamanga kwa mpweya pa galimoto yamoto kunayikidwa ku 10 m / s kwa mitundu yonse ya magalimoto, ndi mu Kuonjezera apo, mitengo itatu yosiyana ya madzi inatengedwa pa jekete lamadzi (5 l / min, 10 l / min ndi 15 l / min).Kuti zitsimikizike kulondola, zotsalira za ma equation onse adayikidwa ofanana ndi 1 × 10-6.Sankhani algorithm ya SIMPLE (Semi-Implicit Method for Pressure Equations) kuti muthetse ma equation a Navier Prime (NS).Kukhazikitsa kwa haibridi kukamalizidwa, kukhazikitsidwako kudzayendetsa maulendo 500, monga momwe chithunzi 7 chikusonyezera.
Nthawi yotumiza: Jul-24-2023