Coman PCMAI Proiect

  • View
    103

  • Download
    21

Embed Size (px)

DESCRIPTION

pcmai

Text of Coman PCMAI Proiect

Chart1-10473.47102467590-8929.3488156408-3776.35316443-5278.6236963305-5352.2792212243-1716.812047365-4041.9707261918-45.752317144-976.8330037298-563.90216088091950.1559780365-2276.4463945123463.1376358335-3962.50906025653446.1569651849-4998.18835672892503.2375787596-5417.29625969891258.2307671682-5549.71835316250-5458.0359662443-1267.6930431382-5042.2500718375-2525.304962614-4020.358251023-3496.4678638249-2354.4209483818-3581.7596305332-640.2321888139-2214.1298916047-20.4363379756436.3252105265-1277.03475561963006.5825239673-3437.3349964263485.2980125382-2636.70153333651115.09992325891624.6451730841-039769.576892899516819.139967348816827.327420188817062.12832758373579.08044637748426.3961294694275.15499330265874.6855979552-1726.42529762325970.5368206676-3908.48349344325945.9411466084-5760.16412661215009.5607161206-6877.46034159343444.4314509133-7351.30076791961707.4260593268-7461.87400777650-7325.1035860678-1701.3414557462-5350.552664476-2679.7118357529-4272.2605419-3715.5449235996-2514.2068747222-3824.8405379158-690.1449102662-2386.7442188281-23.8852866282509.9618497694-1534.69262485963613.198470331-4963.46182571855032.7197245754-8542.51417474183612.7550958103-10087.31084477510

ZTaoT,Z [N]ZT[alfa]Variatia fortelor Tsi Z

Chart20-10473.4710246759-832.2047521282-9695.0561367063-1227.3876875057-7517.3639654743-986.8806605875-4391.4656957978-258.3449594634-977.9038765134563.90216088092030.04777917111094.86079416524144.33715711131180.13692889155251.4260807239912.69966209075589.9986784484477.38803769255561.496509825105549.7183531625-480.97814014055603.3206458704-920.74559986265639.27751943-1197.36590308245328.0923405408-1132.36278945954286.2921100989-640.23218881392304.83587973115.395792726-436.8035407948734.0820476845-3266.551123201799.2505045167-4895.1582317487245.7374654401-2862.8033140178-01624.64517308413706.477545420243179.88785860283912.696884137623964.0391247632057.37446952219154.99691820691553.68973700635881.12583993581726.42529762326215.13107144331879.7918334167115.50836816661715.52475941887633.8187910121255.86618226657691.7857985146647.81818823397546.981299068107461.8740077765-645.50961572147520.0867877747-977.04353264145984.0846700232-1272.38887247265661.9329046856-1209.21210452844577.1870564118-690.14491026622484.5216769583134.8706205703-510.5209056812882.192359813-3925.61901345521154.1061236334-7068.5374103484796.1522209648-9275.04974692680-10087.3108447751

SN [N]S [N]alfaN.S[N]Forte pe bolt

Chart3-263.1196043174-10210.3514203585-10473.4710246759-263.1196043174-9396.1530776407-9659.2726819581-263.1196043174-7153.3674653114-7416.4870696288-263.1196043174-4016.020206337-4279.1398106544-263.1196043174-680.0420327415-943.1616370589-263.11960431742213.27558235391950.1559780365-263.11960431744260.21984239163997.1002380742-263.11960431745380.22354212975117.1039378123-263.11960431745778.10505777735514.98545346-263.11960431745804.08920270585540.9695983884-221.35096699015771.06932015265549.7183531625-221.00343840815803.64280425875582.6393658506-216.01071072425779.61372329465563.6030125704-195.54642939435387.35564039825191.8092110039-142.08388753234276.09580891624134.0119213839-24.57601639762238.70590800242214.1298916047226.2526409819-647.5377514142-421.2851104323798.9745980459-3981.9731509443-3182.99855289842295.451764521-7124.9209636036-4829.46919908266527.6717080927-9379.908709611-2852.237001518311834.9110142571-10210.2658411731624.645173084152432.7627738906-9412.247438915743020.515334974930824.1817253801-7181.720468860423642.461256519612970.8757042288-4050.04733100378920.8283732256384.7796108511-712.59402271295672.18558813823782.78158253062187.7552381375970.53682066762618.4679786674244.24591603036862.71389469732065.54344406275373.01583403877438.55927810141812.0098231475776.55848072097588.5683038681714.59491064735804.53125689887519.12616754611690.79567985925771.07832791737461.87400777651689.13860216085803.19231896627492.330921127122.69826108065781.08487122785903.7831323084122.69826108065394.41246595485517.1107270355122.69826108064291.87390795754414.5721690381122.69826108062264.04595774752386.7442188281122.6982610806-615.0817608494-492.3834997688122.6982610806-3947.9069193225-3825.2086582419122.6982610806-7096.3816620451-6973.6834009644122.6982610806-9363.5147536326-9240.816492552122.6982610806-10210.0091058557-10087.3108447751

PjPPgPg,P [N]Pj [N]aoFg [N]Fj [N]F [N]Variatia fortelor Fg,Fj,F

Chart40-163.5925666736-231.862078897-175.0991860999-42.316650835784.4812463161150.0239913805149.288384467108.440880042854.50687255830-54.9167807277-109.3968446487-151.4678652205-155.1627259564-95.916662490218.901717606130.2459093722150.983984459948.3064084847-0728.6093637687739.1356805065365.0335947423254.492854223258.6451532426257.5796624707217.0154272584149.213634755873.966125330-73.7025387761-116.085789138-160.9583384224-165.6930518598-103.394358459222.0916752954156.5246643853218.0186813159156.50545728980

aoM [Nm]Diagrama momentului motor monocilindru

Chart50-135.7064288876-239.3260313677-331.0007253575-341.0807533565-218.224133092425.324332422275.1006198021361.3577566807185.61619955670584.0661416975547.0903917167255.4819706804314.5931399016505.8548903112680.9982256801861.583315841147.7741797651905.38877014180648.2964527496664.6370311799182.8533004717-47.4612059872-36.5825301969143.4103294157352.3181357954408.819455883223.86121037680702.3265881671717.6473738303334.7891190724218.5988182033220.8189289565221.685626451186.7709515885127.725328079647.68334972840

aoM [Nm]Diagrama Sum M1 - M4

calculDate de intrare si adoptateP=52(kW)1. Calculul termic(W)70.2(CP)Calculul termic al unui motor, cunoscut si sub denumirea de:n=5000(rot/min)calculul ciclului de lucru al motorului', se efectueaza in scopul determinariiTimpi4anticipate a parametrilor proceselor ciclului motor, a indicilor energetici sii=4de economicitate, a presiunii gazelor in cilindrii motorului. Din aceste dateDispozi]ie1se pot stabili dimensiunile fundamentale ale motorului, se poate trasaAlegerea parametrilor initialidiagrama indicata si se pot efectua calculele de rezistenta a principalelorT0=301(K)piese ale motorului.P0=1.02*105(N/m2)Una dintre metodele folosite in calculul termic analitic este si metoda luiTr=1000(K)Grinevetki inbunatatita, care corecteaza diagrama ciclului teoretic dePr=1.20*105(N/m2)referinta. Aceasta metoda se poate aplica atat in stadiul de proiectare cat sil=0.95pentru perfectionarea protortipului.e=9.5Vom realiza in continuare dupa aceasta metoda calculul termic al unui1.1.motor cu aprindere prin scanteie cu caracteristicile urmatoare:DT=25(OC)Puterea nominala : P=52(kW)vp=1.10Turatia puterii nominale: nn=5000(rot/min)Pa=0.9*105(N/m2)Numarul de cilindrii: i=41.2.n1=1.341.1.Alegerea parametrilor initiali:1.3.c=0.854(kg)Temperatura initiala: T0=301(0K)h=0.142(kg)Presiunea initiala: po=1.02(N/m2)O=0.004(kg)Temperatura gazelor reziduale: Tr=1000(0K)Qi=43500(kj/kg)Presiunea gazelor reziduale: pr=1.2(N/m2)10000kcal/kgCoeficientul de exces de aer: l=0.95(-)x=0.9Raportul de comprimare : e=9.5(-)p=4.24Rm=8.3141.2. Calculul procesului de schimbare a gazelor:1.4.n2=1.27Se adopta:1.5.Preancalzirea amestecului:DT=25(OC)mr=0.95Coeficient de postumplere:gp=1.1(-)hm=0.8Presiunea la sfarsit de admisie: Pa=0.9*105(N/m2)1.6.f =0.93Coeficientul gazelor reziduale:1.7.ainj=25(RAC)0.048(-)adev=40(RAC)aiev=28(RAC)Temperatura la sfarsit de admisie:357(0K)Coeficientul de umplere:0.87(-)1.3. Calculul procesului de comprimare:Se adopta:Coeficientul politropic de comprimare: n1=1.34(-)Presiunea la sfarsit de compresie:18*105(N/m2)Temperatura la sfarsit de compresie:767(0K)1.4. Calculul procesului de ardere:Se adopta:Compozitia chimica a 1 Kg benzina : C=0.854(kg)h=0.142(kg)O=0.004(kg)Puterea calorica inferioara Qi=43500(kj/kg)Coeficientul de utilizare a cald x=0.9(-)Coeficientul de crestere a presiunii: p=4.24(-)Cantitatera minima de aer necesara:0.507(kmolaer/kgcomb.)Cantitatea reala de aer necesara:0.48(kmolaer/kgcomb.)Coeficientul teoretic de variatie molara a incarcaturii proaspete:1.07(-)Coeficientul real de variatie molara a incarcaturii proaspete:1.071(-)Caldura specifica molara medie a amestecului initial:33(kj/kmol K)Caldura specifica molara medie a gazelor de ardere:(kj/kmol K)Rm8.314Temperatura la sfarsitul arderii rezulta din ecuatia:abc0.0030037.9982105263-79674.0518731815Delta2400.8Tc=2067(0K)2431.7Tc1Tc2Presiunea la sfarsitul arderii:1831.7-14486.677.94*105(N/m2)Gradul de destindere politropica:0.80(-)1.5. Calculul procesului de destindere:Se adopta:Coeficientul politropic al destinderii n2=1.27(-)Gradul de destindere:11.87(-)Presiunea la sfarsitul destinderii:3.37*105(N/m2)Temperatura la sfarsitul destinderii:1247(0K)1.6. Parametrii principali ai motorului:Se adopta:Coeficientul de rotunjire al diagramei mr=0.95Randamentul mecanic hm=0.8Presiunea medie a ciclului teoretic:=8.60*105(N/m2)Presiunea medie indicata:8.17*105(N/m2)Randamentul indicat:0.25Presiunea medie efectiva:6.54*105(N/m2)Randamentul efectiv:0.20Consumul specific efectiv de combustibil:0.407(kg/kwh)407(g/kwh)1.7. Dimensiunile principale ale motorului:Se adopta:Raportul cursa - alezaj f=0.93Capacitatea cilindrica:0.48(l)Alezajul:93(mm)Cursa:87(mm)Viteza medie a pistonului:14.44(m/s)Cilindrea totala:1.91(l)Puterea litrica:27.2(kW/l)1.8. Diagrama indicata:Se adopta:Unghiul de avans la injec]ie ainj=25(RAC)Unghiul de avans la deschiderea evacuarii adev=40(RAC)Unghiul de intarziere la inchiderea evacuarii adev=28(RAC)Raza manivelei / lungimea bielei:lb=0.28Volumul la sfarsitul admisiei:0.53(dm3)Volumul la sfarsitul comprimarii:0.06(dm3)Pozitia punctului B1:5.1(mm)=0.065(dm3)Pozit