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Ngenxa yeendleko zokusebenza kunye nobude be-injini, isicwangciso esifanelekileyo solawulo lobushushu be-injini sibaluleke kakhulu.Eli nqaku liphuhlise isicwangciso solawulo lwe-thermal yee-motor induction ukubonelela ukuqina okungcono kunye nokuphucula ukusebenza kakuhle.Ukongezelela, uphononongo olubanzi lweencwadi malunga neendlela zokupholisa injini zenziwa.Njengomphumo oyintloko, ukubalwa kwe-thermal ye-high-power-cooled air-cooled asynchronous motor inikezelwa, kuthathelwa ingqalelo ingxaki eyaziwayo yokusabalalisa ukushisa.Ukongezelela, esi sifundo siphakamisa indlela edibeneyo kunye nezicwangciso zokupholisa ezimbini okanye ngaphezulu ukuhlangabezana neemfuno zangoku.Uphononongo lwamanani lomzekelo we-100 kW umoya opholileyo we-asynchronous motor kunye nemodeli yolawulo oluphuculweyo lwe-thermal yemoto efanayo, apho ukonyuka okubonakalayo kokusebenza kakuhle kwemoto kuphunyezwa ngokudityaniswa kokupholisa komoya kunye nenkqubo edibeneyo yokupholisa amanzi. iqhutywe.Inkqubo edibeneyo epholileyo yomoya kunye ne-water-cooled system yafundwa kusetyenziswa i-SolidWorks 2017 kunye ne-ANSYS Fluent 2021 iinguqulelo.Ukuhamba kwamanzi amathathu ahlukeneyo (i-5 L / min, i-10 L / min, kunye ne-15 L / min) yahlaziywa ngokuchasene ne-motor induction induction epholileyo yomoya kwaye yaqinisekiswa ngokusebenzisa izixhobo ezipapashiweyo ezikhoyo.Uhlalutyo lubonisa ukuba kumazinga ahlukeneyo okuhamba (5 L / min, 10 L / min kunye ne-15 L / min ngokulandelanayo) sifumene ukunciphisa okuhambelanayo kweqondo lokushisa kwe-2.94%, 4.79% kunye ne-7.69%.Ke ngoko, iziphumo zibonisa ukuba i-motor induction efakiweyo inokunciphisa ngokufanelekileyo ubushushu xa kuthelekiswa nemoto yokungenisa umoya epholileyo.
Injini yombane yenye yezinto eziphambili eziyilwe kwisayensi yobunjineli bale mihla.Iimotor zombane zisetyenziswa kuyo yonke into ukusuka kwizixhobo zasekhaya ukuya kwizithuthi, kubandakanya nemizi-mveliso yeemoto kunye ne-aerospace.Kwiminyaka yakutshanje, ukuthandwa kwee-motor induction motors (AM) kuye kwanda ngenxa ye-torque yokuqala yokuqala, ukulawulwa kwesantya esilungileyo kunye nomthamo womthamo ophakathi (Umfanekiso 1).Iinjini zokungeniswa azenzi kuphela iiglowubhu zakho zokukhanya, kodwa zinika amandla uninzi lwezixhobo ezisendlini yakho, ukusuka kwibhrashi yamazinyo ukuya kwiTesla yakho.Amandla omatshini kwi-IM adalwe ngokuqhagamshelana nommandla wamagnetic we-stator kunye ne-rotor windings.Ukongeza, i-IM lukhetho olusebenzayo ngenxa yonikezelo oluncinci lwezinyithi zomhlaba ezinqabileyo.Nangona kunjalo, eyona nto ingalunganga kwii-ADs kukuba ubomi bazo kunye nokusebenza kwabo kubuthathaka kakhulu kubushushu.Iimotor induction zisebenzisa malunga ne-40% yombane wehlabathi, nto leyo ekufuneka isikhokelele ekucingeni ukuba ukulawula ukusetyenziswa kombane kwaba matshini kubalulekile.
I-equation ye-Arrhenius ithi rhoqo nge-10°C ukunyuka kobushushu bokusebenza, ubomi be-injini yonke buba sisiqingatha.Ngoko ke, ukuqinisekisa ukuthembeka kunye nokwandisa imveliso yomatshini, kuyimfuneko ukunikela ingqalelo kulawulo lwe-thermal yoxinzelelo lwegazi.Ngaphambili, uhlalutyo thermal iye ingahoywa kwaye abayili motor baye baqwalasela ingxaki kuphela kwi periphery, ngokusekelwe kumava uyilo okanye ezinye iiguqu-guquko ezinobukhulu ezifana noxinaniso lwangoku olujikajikayo, njl. Ezi ndlela zikhokelela ekusebenziseni imida yokhuseleko enkulu kakhulu- iimeko zokufudumeza iimeko, okubangela ukwanda kobukhulu bomatshini kwaye ngoko ke ukunyuka kweendleko.
Kukho iintlobo ezimbini zohlalutyo lwe-thermal: uhlalutyo lwesekethe edibeneyo kunye neendlela zamanani.Inzuzo ephambili yeendlela zokuhlalutya kukukwazi ukwenza izibalo ngokukhawuleza nangokuchanekileyo.Nangona kunjalo, kufuneka kwenziwe umgudu omkhulu wokuchaza iisekethe ngokuchaneka okwaneleyo ukulinganisa iindlela ezishushu.Kwelinye icala, iindlela zamanani zahlulwe ngokurhabaxa zibe yi-computational fluid dynamics (CFD) kunye ne-structural thermal analysis (STA), zombini ezo zisebenzisa uhlalutyo lwento ephelelisiweyo (FEA).Inzuzo yohlalutyo lwamanani kukuba ikuvumela ukuba wenze imodeli yejometri yesixhobo.Nangona kunjalo, ukuseta inkqubo kunye nokubala ngamanye amaxesha kunokuba nzima.Amanqaku enzululwazi axutyushwa ngezantsi yimizekelo ekhethiweyo yohlalutyo lwe-thermal kunye ne-electromagnetic yeemotor ezahlukeneyo zale mihla.La manqaku aye abangela ukuba ababhali bafunde i-thermal phenomena kwiimotor ze-asynchronous kunye neendlela zokupholisa kwazo.
U-Pil-Wan Han1 wayebandakanyeka kuhlalutyo lwe-thermal kunye ne-electromagnetic ye-MI.Indlela yohlalutyo lwesekethe edibeneyo isetyenziselwa uhlalutyo lwe-thermal, kwaye indlela yento eguquguqukayo yamagnetic isetyenziselwa uhlalutyo lwe-electromagnetic.Ukuze unikeze ngokufanelekileyo ukukhuselwa kwe-thermal overload kuyo nayiphi na inkqubo yoshishino, ukushisa kwe-stator winding kufuneka kuqikelelwe ngokuthembekileyo.U-Ahmed et al.2 ucebise imodeli yenethiwekhi yobushushu obuphezulu obusekwe kwingqwalasela enzulu ye-thermal kunye ne-thermodynamic.Ukuphuhliswa kweendlela zokulinganisa i-thermal kwiinjongo zokukhusela i-industrial thermal inzuzo kwizisombululo zohlalutyo kunye nokuqwalaselwa kweeparamitha ze-thermal.
U-Nair et al.3 wasebenzisa uhlalutyo oludibeneyo lwe-39 kW IM kunye ne-3D uhlalutyo lwamanani e-thermal ukuqikelela ukuhanjiswa kwe-thermal kumatshini wombane.U-Ying et al.4 uhlalutye i-fan-cooled evalwe ngokupheleleyo (TEFC) ii-IMs kunye noqikelelo lobushushu be-3D.Inyanga et al.I-5 ifunde iipropati zokuhamba kobushushu ze-IM TEFC isebenzisa i-CFD.Imodeli yenguqu yemoto yeLPTN yanikwa nguTodd et al.6.Idatha yovavanyo lobushushu isetyenziswa kunye namaqondo obushushu abaliweyo athatyathwe kwimodeli ecetywayo ye-LPTN.UPeter et al.7 wasebenzisa iCFD ukufunda ukuhamba komoya okuchaphazela ukuziphatha kwe-thermal yeemoto zombane.
UCabral et al8 ucebise imodeli ye-thermal ye-IM elula apho ubushushu bomatshini bufunyenwe ngokufaka i-cylinder heat diffusion equation.U-Nategh et al.9 wafunda inkqubo ye-motor ye-traction yomoya esebenzisa i-CFD ukuvavanya ukuchaneka kwezinto eziphuculweyo.Ke, izifundo zamanani kunye novavanyo zingasetyenziselwa ukulinganisa uhlalutyo lwe-thermal yeemotor induction, jonga umkhiwane.2.
U-Yinye et al.10 ucebise uyilo lokuphucula ulawulo lwe-thermal ngokuxhaphaza iimpawu eziqhelekileyo zokushisa izinto eziqhelekileyo kunye nemithombo eqhelekileyo yokulahlekelwa kwengxenye yomatshini.UMarco et al.11 ubonise indlela yokuyila iinkqubo zokupholisa kunye neebhatyi zamanzi kumalungu omatshini usebenzisa i-CFD kunye ne-LPTN imodeli.U-Yaohui et al.12 unikezela ngezikhokelo ezahlukeneyo zokukhetha indlela yokupholisa efanelekileyo kunye nokuvavanya ukusebenza kwangoko kwinkqubo yoyilo.U-Nell et al.13 ucebise ukusebenzisa imifuziselo yokulinganisa i-electromagnetic-thermal edityanisiweyo kuluhlu olunikiweyo lwamaxabiso, inqanaba leenkcukacha kunye namandla okubalayo kwingxaki ye-multiphysics.UJean et al.14 kunye noKim et al.15 bafunde ukuhanjiswa kweqondo lokushisa kwe-motor-cooled induction motor usebenzisa i-3D edibeneyo i-FEM field.Bala idatha yokufaka usebenzisa i-3D eddy uhlalutyo lwangoku lwentsimi ukuze ufumane ilahleko zeJoule kwaye uzisebenzise kuhlalutyo lwe-thermal.
UMichel et al.16 uthelekisa iifeni zokupholisa ze-centrifugal eziqhelekileyo kunye nabalandeli be-axial boyilo olwahlukeneyo ngokulinganisa kunye nokulinga.Olunye lolu yilo luphumelele ukuphuculwa okuncinci kodwa okubalulekileyo ekusebenzeni kwe-injini ngelixa kugcinwe ubushushu obufanayo bokusebenza.
U-Lu et al.17 usebenzise indlela elinganayo yesekethe yemagnethi edityaniswe nemodeli yeBoglietti ukuqikelela ilahleko yentsimbi kwishafti yenjini yokungenisa.Ababhali bacinga ukuba usasazo lwe-magnetic flux density kulo naliphi na icandelo lomnqamlezo ngaphakathi kwi-spindle motor lifana.Bathelekisa indlela yabo kunye neziphumo zohlalutyo lwezinto ezinomda kunye neemodeli zovavanyo.Le ndlela ingasetyenziselwa uhlalutyo olucacileyo lwe-MI, kodwa ukuchaneka kwayo kulinganiselwe.
I-18 ibonelela ngeendlela ezahlukeneyo zokuhlalutya intsimi ye-electromagnetic yeemotor zokungenisa ezihambelanayo.Phakathi kwazo, iindlela zokuqikelela ilahleko yamandla kwiireyile ezisebenzayo kunye neendlela zokuqikelela ukunyuka kwamaqondo obushushu eenjini zokutsalwa kwentambo zichaziwe.Ezi ndlela zinokusetyenziselwa ukuphucula amandla okuguqula amandla eemotor zokufakelwa.
Zabdur et al.I-19 iphande ukusebenza kweebhatyi zokupholisa kusetyenziswa indlela yamanani anamacala amathathu.Ibhatyi yokupholisa isebenzisa amanzi njengowona mthombo wokupholisa kwisigaba sesithathu se-IM, esibalulekileyo kumbane kunye namaqondo obushushu aphezulu afunekayo ekumpompeni.Rippel et al.20 baye banelungelo elilodwa lomenzi wechiza indlela entsha kwiinkqubo zokupholisa ulwelo ezibizwa ngokuba yi-transverse laminated cooling, apho isikhenkcezisi sityhutyha ngendlela enqamlezayo kwimimandla emxinwa eyenziwe yimingxunya komnye nomnye ngemagnethi.Deriszade et al.21 iphonononge ngokupholisa kweenjini zokutsala kwishishini leemoto isebenzisa umxube we-ethylene glycol kunye namanzi.Vavanya ukusebenza kwemixube eyahlukeneyo kunye ne-CFD kunye nohlalutyo lwe-3D lwe-turbulent fluid.Uphononongo lokulinganisa olwenziwa nguBoopathi et al.22 lubonise ukuba izinga lokushisa kwiinjini ezipholileyo zamanzi (17-124 ° C) zincinci kakhulu kuneenjini ezipholileyo zomoya (104-250 ° C).Ubushushu obuphezulu bemoto ye-aluminium epholileyo yamanzi iyancipha nge-50.4%, kwaye ubushushu obukhulu be-PA6GF30 i-motor-cooled motor iyancipha ngama-48.4%.U-Bezukov et al.23 uvavanye umphumo wokwenziwa kwesikali kwi-thermal conductivity yodonga lwe-injini kunye nenkqubo yokupholisa ulwelo.Uphononongo lubonise ukuba ifilimu ye-oxide ye-1.5 mm yehlisa ukuhanjiswa kobushushu nge-30%, yonyusa ukusetyenziswa kwamafutha kunye nokunciphisa amandla enjini.
Tanguy et al.24 baqhube imifuniselo enamazinga okuqukuqela ahlukeneyo, amaqondo obushushu e-oyile, isantya sokujikeleza kunye neendlela zokutofa iimoto zombane zisebenzisa ioyile yokuthambisa njengesipholisi.Ubudlelwane obuluqilima buye basekwa phakathi kwesantya sokuhamba kunye nokusebenza kakuhle kokupholisa.U-Ha et al.25 ucebise ukusebenzisa imilomo yokuthontsiza njengemilomo yokusasaza ngokulinganayo ifilimu yeoli kunye nokwandisa ukusebenza kakuhle kokupholisa kwe-injini.
U-Nandi et al.26 uhlalutye umphumo wemibhobho yokushisa epholileyo efana ne-L ekusebenzeni kwe-injini kunye nokulawulwa kwe-thermal.Inxalenye ye-evaporator yombhobho wokushisa ifakwe kwi-motor casing okanye ingcwatywe kwi-motor shaft, kwaye inxalenye ye-condenser ifakwe kwaye ipholile ngokujikeleza kwamanzi okanye umoya.Bellettre et al.I-27 ifunde inkqubo yokupholisa yolwelo olululwelo lwe-PCM kwistator yemoto edlulayo.I-PCM ifakela iintloko ezijikelezayo, ithobe ubushushu bendawo eshushu ngokugcina amandla obushushu afihlakeleyo.
Ke, ukusebenza kwemoto kunye nobushushu buvavanywa kusetyenziswa iindlela ezahlukeneyo zokupholisa, bona umkhiwane.3. Ezi zijikelezo zokupholisa ziyilelwe ukulawula ubushushu bee-windings, iipleyiti, iintloko ezijikelezayo, iimagnethi, isidumbu kunye neepleyiti zokuphela.
Iinkqubo zokupholisa ulwelo ziyaziwa ngokugqithisela ubushushu obusebenzayo.Nangona kunjalo, ukumpompa isisipholisi esijikeleze i-injini kudla amandla amaninzi, nto leyo enciphisa amandla asebenzayo e-injini.Iinkqubo zokupholisa umoya, kwelinye icala, yindlela esetyenziswa ngokubanzi ngenxa yeendleko zabo eziphantsi kunye nokulula kokuphucula.Nangona kunjalo, ayisasebenzi kakuhle kuneenkqubo zokupholisa ulwelo.Indlela edibeneyo iyadingeka enokudibanisa ukusebenza okuphezulu kokutshintshwa kobushushu benkqubo epholileyo yolwelo kunye nexabiso eliphantsi lenkqubo yokupholisa umoya ngaphandle kokutya amandla ongezelelweyo.
Eli nqaku lidwelisa kwaye lihlalutye ilahleko zobushushu kwi-AD.Indlela yale ngxaki, kunye nokufudumeza kunye nokupholisa kweenjini zokungeniswa, kuchazwe kwi-Heat Loss kwi-Induction Motors icandelo ngokusebenzisa i-Cooling Strategies.Ilahleko yobushushu bondoqo wemoto yokungenisa iguqulwa ibe bubushushu.Ngoko ke, eli nqaku lixubusha indlela yokutshintshwa kobushushu ngaphakathi kwe-injini ngokuqhuba kunye nokunyanzeliswa kwe-convection.Imodeli ye-Thermal ye-IM isebenzisa i-equation equation, i-Navier-Stokes / i-equations ye-momentum kunye ne-energy equations ixeliwe.Abaphandi benza uhlalutyo kunye nezifundo zokushisa zamanani ze-IM ukuqikelela ubushushu be-stator windings ngenjongo yodwa yokulawula ulawulo lwe-thermal yemoto yombane.Eli nqaku ligxininise kuhlalutyo lwe-thermal ye-IMs ezipholileyo zomoya kunye nohlalutyo lwe-thermal ye-IM edibeneyo epholileyo yomoya kunye ne-water-cooled IM esebenzisa i-CAD modeling kunye ne-ANSYS Ukulinganisa ngokufanelekileyo.Kwaye iingenelo ze-thermal zemodeli edibeneyo ephuculweyo ye-air-cooled and water-cooled systems ihlalutywa ngokunzulu.Njengoko kukhankanyiwe ngasentla, amaxwebhu adweliswe apha ayisosishwankathelo sobume bezobugcisa kwinkalo yeziganeko ezishisayo kunye nokupholisa ii-motor induction, kodwa zibonisa iingxaki ezininzi ezifuna ukusonjululwa ukuze kuqinisekiswe ukusebenza okuthembekileyo kwee-motor induction. .
Ukulahleka kobushushu ngokuqhelekileyo kwahlulahlula ibe yilahleko yobhedu, ilahleko yentsimbi kunye ne-friction / mechanical loss.
Ilahleko zethusi ziziphumo zokufudumeza kwe-Joule ngenxa yokumelana nomqhubi kwaye zinokubalwa njenge-10.28:
apho i-q̇g bubushushu obuveliswayo, mna kunye ne-Ve zingumbane okhoyo kunye nombane, ngokulandelelana, kunye noRe luxhathiso lobhedu.
Ilahleko yentsimbi, eyaziwa ngokuba yi-parasitic loss, luhlobo lwesibini oluphambili lwelahleko olubangela i-hysteresis kunye nelahleko yangoku ye-eddy kwi-AM, ikakhulu ebangelwa yintsimi yamagnetic eguquguqukayo yexesha.Zibalwe nge-equation eyandisiweyo ye-Steinmetz, i-coefficients yayo inokuqwalaselwa rhoqo okanye iguquguqukayo ngokuxhomekeke kwiimeko zokusebenza10,28,29.
apho i-Khn i-hysteresis loss factor ephuma kwi-diagram yokulahlekelwa kwe-core, i-Ken yi-eddy yangoku yokulahlekelwa yinto, i-N isalathisi se-harmonic, i-Bn kunye ne-f yi-peak flux density kunye ne-frequency of non-sinusoidal excitation, ngokulandelanayo.Le nxaki ingentla ingenziwa lula ngolu hlobo lulandelayo10,29:
Phakathi kwabo, i-K1 kunye ne-K2 yi-core loss factor kunye ne-eddy current loss (qec), i-hysteresis loss (qh), kunye nokulahlekelwa okugqithisileyo (qex), ngokulandelanayo.
Umthwalo womoya kunye neelahleko zokungqubana zezona zizathu zimbini zelahleko yoomatshini kwi-IM.Ilahleko yomoya kunye nongquzulwano yi-10,
Kwifomula, n isantya sokujikeleza, i-Kfb yi-coefficient yelahleko ze-friction, D yi-diameter yangaphandle ye-rotor, l ubude be-rotor, i-G ubunzima be-rotor 10.
Esona sixhobo siphambili sokuhambisa ubushushu ngaphakathi kwe-injini kukuqhuba kunye nokufudumeza kwangaphakathi, njengoko kumiselwe yi-Poisson equation30 esetyenziswa kulo mzekelo:
Ngexesha lokusebenza, emva kwexesha elithile xa i-motor ifikelela kwisimo esizinzileyo, ubushushu obuveliswayo bunokuqikelelwa ngokufudumeza rhoqo kobushushu obuphezulu.Ngoko ke, kunokucingelwa ukuba ukuqhutyelwa ngaphakathi kwe-injini kuqhutyelwa ngokukhululwa kokushisa kwangaphakathi.
Ukutshintshwa kobushushu phakathi kwee-fins kunye ne-atmosphere ejikelezileyo kuthathwa njengokunyanzeliswa kwe-convection, xa ulwelo lunyanzeliswa ukuba luhambe ngendlela ethile ngamandla angaphandle.I-Convection ingabonakaliswa njenge-30:
apho h i-coefficient yokudlulisa ubushushu (W / m2 K), A yindawo engaphezulu, kunye ne-ΔT ngumahluko weqondo lokushisa phakathi kwendawo yokudlulisa ubushushu kunye ne-refrigerant perpendicular to surface.Inombolo ye-Nusselt (i-Nu) ngumlinganiselo womlinganiselo we-convective and conductive heat transfer perpendicular to the boundary kwaye ikhethwa ngokusekelwe kwiimpawu ze-laminar kunye ne-turbulent flow.Ngokwendlela yobungqina, inani le-Nusselt lokuhamba kwesiphithiphithi lihlala linxulunyaniswa nenombolo yeReynolds kunye nenombolo yePrandtl, echazwe njenge-30:
apho i-h yi-coefficient yokudlulisa ubushushu obuhambisayo (W/m2 K), l bubude bempawu, λ yi-thermal conductivity yolwelo (W/m K), kunye nenombolo yePrandtl (Pr) ngumlinganiselo womlinganiselo we i-coefficient yosasazo lwesantya ukuya kwi-thermal diffusivity (okanye isantya kunye nobukhulu obuzalanayo bomaleko womda we-thermal), echazwa njenge-30:
apho i-k kunye ne-cp ziyi-thermal conductivity kunye nomthamo wobushushu obuthile bolwelo, ngokulandelelanayo.Ngokubanzi, umoya kunye namanzi zezona zipholileyo zixhaphakileyo kwiinjini zombane.Iipropati zolwelo zomoya kunye namanzi kubushushu be-ambient ziboniswa kwiThebhile yoku-1.
Imodeli ye-thermal ye-IM isekelwe kwezi ngcamango zilandelayo: i-3D imo ezinzileyo, i-turbulent flow, umoya yigesi efanelekileyo, i-radiation engabonakaliyo, i-Newtonian fluid, i-incompressible fluid, imeko yokungatyibiliki, kunye neempawu eziqhubekayo.Ke ngoko, ezi zibalo zilandelayo zisetyenziselwa ukuzalisekisa imithetho yokugcinwa kobunzima, umfutho, kunye namandla kummandla wolwelo.
Kwimeko jikelele, i-equation yolondolozo yobunzima ilingana nokuhamba kobunzima bomnatha kwiseli enolwelo, egqitywe yifomula:
Ngokomthetho wesibini kaNewton, izinga lokutshintsha kwesantya sesuntswana elingamanzi lilingana nesixa semikhosi esebenza kuyo, kwaye i-equation yolondolozo lwesantya jikelele ingabhalwa kwifom ye-vector njenge:
Amagama ∇p, ∇∙τij, kunye no-ρg kule nxaki ingasentla amele uxinzelelo, i-viscosity, kunye nomxhuzulane, ngokulandelelana kwawo.Imidiya yokupholisa (umoya, amanzi, i-oyile, njl.njl.) esetyenziswa njengezipholisi koomatshini ithathwa njengeNewtonian.Iinxaki eziboniswe apha zibandakanya kuphela unxulumano oluphakathi koxinzelelo lokucheba kunye nethambeka lesantya (isantya soxinzelelo) ngokwependicular ukuya kwicala lokucheba.Ukuqwalasela i-viscosity eqhubekayo kunye nokuhamba okuzinzile, i-equation (12) ingatshintshwa ibe yi-31:
Ngokomthetho wokuqala we-thermodynamics, umlinganiselo wenguqu kumandla we-liquid particle ulingana ne-sum of the net heat eyenziwa yi-particle ye-liquid kunye namandla e-net aveliswa yi-particle liquid.Ukuqukuqela kwe-viscous ye-Newtonian ecinezelekileyo, i-equation yogcino lwamandla inokuchazwa njenge31:
apho i-Cp iyindawo yobushushu kuxinzelelo olungaguqukiyo, kwaye igama ∇ ∙ (k∇T) linxulumene ne-thermal conductivity ngomda weseli yolwelo, apho i-k ibonisa ukuhanjiswa kwe-thermal.Ukuguqulwa kwamandla omatshini kubushushu kuqwalaselwa ngokwemigaqo ye \ (\ varnothing \) (oko kukuthi, umsebenzi wokuchithwa kwe-viscous) kwaye ichazwa njenge:
Apho \(\rho\) kukuxinana kolwelo, \(\mu\) yiviscosity yolwelo, u, v kunye no-w zizinto ezinokubakho zesalathiso u-x, y, z wesantya solwelo, ngokulandelelanayo.Eli gama lichaza ukuguqulwa kwamandla omatshini kumandla obushushu kwaye inokungahoywa kuba ibalulekile kuphela xa i-viscosity ye-fluid iphezulu kakhulu kwaye i-velocity gradient ye-fluid inkulu kakhulu.Kwimeko yokuhamba ngokuzinzile, ukushisa okuthe ngqo okuthe ngqo kunye ne-thermal conductivity, i-equation yamandla iguqulwa ngolu hlobo lulandelayo:
Ezi zibalo zisisiseko zisonjululwa ukuhamba kwe-laminar kwi-Cartesian coordinate system.Nangona kunjalo, njengezinye iingxaki ezininzi zobugcisa, ukusebenza koomatshini bombane kuhambelana nokuhamba okungahambi kakuhle.Ke ngoko, ezi zibalo zihlengahlengiswa ukuze zenze i-Reynolds Navier-Stokes (RANS) indlela yokulinganisa imodeli yesiphithiphithi.
Kulo msebenzi, inkqubo ye-ANSYS FLUENT 2021 ye-CFD imodeli kunye neemeko zemida ehambelanayo yakhethwa, njengomzekelo ocatshangelwayo: i-injini ye-asynchronous kunye nokupholisa umoya kunye nomthamo we-100 kW, ububanzi be-rotor 80.80 mm, ububanzi ye-stator 83.56 mm (yangaphakathi) kunye ne-190 mm (yangaphandle), i-gap yomoya ye-1.38 mm, ubude obupheleleyo be-234 mm, inani , ubukhulu beembambo ze-3 mm..
Imodeli yenjini epholileyo yomoya yeSolidWorks iye ingeniswe kwi-ANSYS Ngobuchule kwaye ifaniswe.Ukongezelela, iziphumo ezifunyenweyo zihlolwe ukuqinisekisa ukuchaneka kokulinganisa okwenziwe.Ukongezelela, i-IM edibeneyo yomoya kunye namanzi epholileyo ifakwe imodeli isebenzisa isofthiwe ye-SolidWorks 2017 kwaye ifaniswe ngokusebenzisa i-ANSYS Fluent 2021 software (Figure 4).
Uyilo kunye nobukhulu balo mzekelo buphefumlelwe yi-Siemens 1LA9 i-aluminium series kunye nemodeli kwi-SolidWorks 2017. Imodeli iguqulwe kancinane ukuze ihambelane neemfuno zesofthiwe yokulinganisa.Guqula iimodeli ze-CAD ngokususa iindawo ezingafunekiyo, ukususa iifayili, ii-chamfers, kunye nokunye xa usenza imodeli nge-ANSYS Workbench 2021.
I-design innovation yi-jacket yamanzi, ubude obunqunywe kwiziphumo zokulinganisa imodeli yokuqala.Olunye utshintsho lwenziwe kwi-simulation yejacket yamanzi ukuze ufumane iziphumo ezilungileyo xa usebenzisa isinqe kwi-ANSYS.Iinxalenye ezahlukeneyo ze-IM ziboniswe kwifig.5a–f.
(A).I-Rotor core kunye ne-IM shaft.(b) Undoqo we-IM stator.(c) Ujiko lwe-IM stator.(d) Isakhelo sangaphandle se-MI.(e) Ibhatyi yamanzi ye-IM.f) indibaniselwano yomoya kunye namanzi apholileyo iimodeli ze-IM.
I-fan efakwe kwi-shaft inikezela ukuhamba komoya rhoqo kwi-10 m / s kunye nobushushu be-30 ° C kumphezulu wamaphiko.Ixabiso lezinga likhethwa ngokungaqhelekanga kuxhomekeke kumandla oxinzelelo lwegazi oluhlalutywe kweli nqaku, elikhulu kunokuba liboniswe kwiincwadi.Indawo eshushu ibandakanya i-rotor, i-stator, i-stator windings kunye ne-rotor cage bars.Izinto ze-stator kunye ne-rotor ziyinsimbi, i-windings kunye neentonga ze-cage zinobhedu, isakhelo kunye neembambo ziyi-aluminium.Ubushushu obuveliswa kule mimandla bubangelwa yi-electromagnetic phenomena, njengokufudumala kwe-Joule xa umsinga wangaphandle udlula kwikhoyili yethusi, kunye notshintsho kwintsimi yamagnetic.Amazinga okukhutshwa kobushushu amacandelo ahlukeneyo athathwe kuncwadi olwahlukeneyo olukhoyo lwe-100 kW IM.
I-IMs edibeneyo yomoya opholileyo kunye namanzi apholileyo, ngaphezu kweemeko ezingentla, nazo zibandakanya ibhatyi yamanzi, apho amandla okudlulisa ukushisa kunye neemfuno zamandla ompompo zahlaziywa kwiinqanaba ezahlukeneyo zokuhamba kwamanzi (5 l / min, 10 l / min. kunye ne-15 l / min).Le valve ikhethwe njenge-valve encinci, ekubeni iziphumo azizange zitshintshe kakhulu ukuhamba ngaphantsi kwe-5 L / min.Ukongezelela, izinga lokuhamba kwe-15 L / min likhethwe njengelona xabiso liphezulu, ekubeni amandla okupompa anyuka kakhulu nangona izinga lokushisa liqhubeka liwa.
Iimodeli ezahlukeneyo ze-IM zangeniswa kumazwe angaphandle kwi-ANSYS Ngobuchule kwaye yahlelwa ngakumbi kusetyenziswa i-ANSYS Design Modeler.Ukuqhubela phambili, i-casing-shaped casing enemilinganiselo ye-0.3 × 0.3 × 0.5 m yakhiwe malunga ne-AD ukuhlalutya ukuhamba komoya malunga ne-injini kunye nokufunda ukukhutshwa kobushushu emoyeni.Uhlalutyo olufanayo lwenziwa kwii-IMs ezidityanisiweyo zomoya kunye namanzi.
Imodeli ye-IM ilandelwa kusetyenziswa iindlela ze-CFD kunye ne-FEM zamanani.I-Meshes yakhiwe kwi-CFD ukwahlula i-domain kwinani elithile lamacandelo ukuze kufumaneke isisombululo.I-Tetrahedral meshes enobukhulu obufanelekileyo be element isetyenziswa kwijiyometri entsonkothileyo ngokubanzi yamacandelo enjini.Zonke ii-interfaces zazaliswa ngezaleko ze-10 ukufumana iziphumo ezichanekileyo zokutshintshwa kobushushu bomhlaba.Ijometri yegridi yeemodeli ezimbini ze-MI iboniswe kuMzobo.6a, b.
I-equation yamandla ikuvumela ukuba ufunde ukuhanjiswa kobushushu kwiindawo ezahlukeneyo ze-injini.Imodeli ye-K-epsilon ye-turbulence kunye nemisebenzi yodonga oluqhelekileyo yakhethwa ukuba imodeli ye-turbulence ejikeleze umphezulu wangaphandle.Imodeli ithatha ingqalelo amandla kinetic (Ek) kunye nesiphithiphithi dissipation (epsilon).Ubhedu, i-aluminiyam, intsimbi, umoya kunye namanzi zakhethwa kwiipropati ezisemgangathweni ukuze zisetyenziswe kwizicelo zazo.Amazinga okushisa obushushu (jonga kwiTheyibhile 2) anikezelwa njengamagalelo, kwaye iimeko ezahlukeneyo zendawo yebhetri zimiselwe kwi-15, 17, 28, 32. ukongezelela, amaxabiso amathathu ahlukeneyo amanzi athathwe kwi-akhawunti yejacket yamanzi (5 l / min, 10 l / min kunye ne-15 l / min).Ukuchaneka okukhulu, iintsalela zazo zonke ii-equations zibekwe zilingana no-1 × 10–6.Khetha i-SIMPLE (I-Semi-Implicit Method ye-Pressure Equations) i-algorithm yokusombulula i-Navier Prime (NS) equations.Emva kokuba ukuqaliswa komxube kugqityiwe, ukuseta kuya kuqhuba uphindaphindo lwe-500, njengoko kubonisiwe kuMfanekiso 7.
Ixesha lokuposa: Jul-24-2023