tính toán thiết kế động cơ đốt trong (dm4-0112)

tính toán thiết kế động cơ đốt trong (dm4-0112)

   !"#$%&  '()'(*+,-,./0,) 1*+ 234 5461 &7 &,8 9+4:;<9 = ; %>?  @ A 9+4:BC,4/D =  %>?  E FA=  9+4:;+G =  %>?  @@ EA=  9+4:,4;H<9 = / %>?  I FAF@= ; J+(K0/D L4M<9   N NANF J+(K0/D L4(   I EAF  !"#$%&'( =BM0BOP)9  Q,+QR9 ,  ,  Q9 S  S  T8//,G)   n nx c cnx V V pp         = U V) c nx V V i = /,G)    n cnx i pp =  0G)9 S WX S YX9+4:WXZ,<?0Z?D:;H10BOP YXJ+P5,O  ==   n ac pp ε IIUF N Q@UN%>?   )!"#$%&'*+ =BM0BO[K)9  Q,+QR9 \  ,  Q9 S  S  T8//,G)   n gnx z zgnx V V pp         =  C) Cz VV ρ = WX0V) c gnx V V i =  /,G)    n n z gnx i p p ρ = (1.2)   0G9 S WX S YX9+4:WXZ,<?0Z?D:;H10BO[K ,.  - .  .    / Q , ]   ( ) ( ) N   FEUFEU  ^NU    dmS D V h === ππ   ( ) N NU FUI FEU  dm V V h C = − = − = ε   ( ) N ENIUNUFUI dmVVVV chCa ===+= ε   ( ) N EUNUEU dmVV cz === ρ  _`0 ε /Ya90Bb,D(S,07-/0,,0Z?10BOPWX 0BO[K / 012&3-&4&56- '()'(707,*,./0, x V i Âæåìng neïn Âæåìng giaîn nåí  n i   n i  n c i P  n i   n i    n n z i P ρ N    @N   I E E IN E^ ^ EI @  @  EE NF ^   I F N  N @  E N   @E E  E^ I FF E E ^I^  ^ II N E ^ @ N F @ FIN  IF  I N^N I E ^ ^ I  ^ @E@ @  N I  I F F E NI @F @ I N  NF  N ^@ E FN NN  E@  ^  E ^N N@  ^@N N E NI  I   NF N NF N N EF^  @I   NE@ N  ^EE  @ E E N^I N F N@ N E@ ^ @   I NN^ N E E I E^N  @ N@EN N ^ E IF FN  E NF N E !7879:;<09=>9=?@8A8B CZ? , U=   , Z,D4,6 , QUNcYd =  9+4:;+GU9e4,WX,00, ,04DM,./9+) FNU N FEU N  === nS C M c?>+d /:6)RF?>+ %BWa60,;(+YX0,,0,/Uf0G9+4:;<99  0Bb,S,07) 9  QUEAU9   0G)9  9+4:BC,4/D=  QUFA9 ;  9  QUFE9 ; QFEU@QUEc%>?  d 9  QUI9  QUIUEQU@@c%>?  d  Wa6UNgU@@ • Z?/ / g= /  C / Qh , QIUFUNQENIcYd = / QUIc%>?  d Wa60Z?/UENIgUI • Z?D / g= D  WC= D )9+4:,4L4M[K  d>c@IU FUI U  IU mMN P P n z b === ε  Wa60Z?DUENIgU@I ,0Z?0V,D3)   , g9  QUNgU@@g/ / g9 / QUENIgUI N   D / g9 D QUENIgU@Ig, , g9 , QUNg@UN  \ , g9 \ QUEgUg6 , g9 \ QUNgU DE&F3G ZWi07,*/j,3k,,DBC,B+/4) ]-JY3S,) ( ) mmmMN p >EU  U  == µ   ( ) mmdm v >NU  NU N == µ  '(N)'(7DZ4fl07,*) V x  n c i P    n n z i P ρ  N@E  E ^E   EE@ N^IF N NE@ ^FN   EIEE E E^ NNE @ N^ NNF I E ^I ^ ^ N^@ F I@ EE  @ IFI  E@ EFN  ^@ @ N N@ ^^  NF II E NEF I @ NF FF I NN F@ IF ^N ^E^  ]i3e,-/00G)e,XDZ4flZ,SY/Ue,4DZ4fl9 +4:;Z ]`,,+Y340[,/S,070Bb,,,-/00Z?13e,-/0%,,-/ 00Z?Dm,,0BO,,b90Bb,0BO,PWX0BO,[K ]i0BODZ4flL4M<9WXL4M(Dm/0BOn++WC e,X0L4//0Z?= / WX= /,G0Bb,07,*Y246 ]"34,J07,*) i07D,;9/107,*o:6D;,4pTDmq;( ,,` / 0 , JY3S,07D,;) ( ) mmm s s bd th s >EU @F EF === à o:6Wr9/9(0Z?st?;()sst R = &7DZ4fl)sstQ U EU IEUEU === s R à ?? %,,0Z?4/,./0BOPWX0BO(KWC,,0Z?0V,D3U+i 0Bb,07,*Y246 u07',;S,07,,0Z?) 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EF= 159773,11 Ni CF v FD, ng phõn nh hng CF thnh 8 phõn bng nhau v ỏnh s th t 0;1;2ng phõn nh FD thnh 8 phõn bng nhau v ỏnh s th t 0;1;2v cỏc ng bao trong tip tuyn 11;22;33Ta cú ng cong biu din quan h j = f ( x ) 12 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) j ệTHậ GIA TC à j = 159,733 m/s2.mm C j(s) 1' F 2' 1 3' A E B F S 2 4' F 1 2 Hỡnh 1-5: th gia tc J = f ( x ) 3 4 D 1.2.2 Tớnh toỏn ng lc hc... -19,97 -0,76 22,87 4,23 0,81 -28,20 -0,60 21,16 3,38 0,91 -37,37 -0,42 17,20 1,77 0,98 -41,55 -0,21 9,13 0 1,00 -43,00 0,00 0,00 Bng 1-2: Bng giỏ tr T, N, Z- 18 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) + V h trc ta Decac trong ú trc honh biu th giỏ tr gúc quay trc khuyu, trc tung biu din g T,N,Z T bng 2 ta xỏc nh c ta cỏc im trờn h trc, ni cỏc im li bng cỏc ng co hp cho ta th biu din: T = f ( ) Z =... 0,22 n 0,34mm s 2 0,45 n 0,57mm dõu 0,1 n 0,4mm 2.2.2 THANH TRUYN Thanh truyn c ỳc bng thộp hp kim 31 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.4 Kt cu thanh truyn 1-Thõn thanh truyn; 2-Bu lụng thanh truyn; 3-Np õu to 2.2.3 TRC KHUU Trc khuyu cú kt cu khỏ c bit, bờn trong cú ng dõu i bụi trn cỏc bc lút v c trc Hỡnh 2.1.5 Kt cu trc khuu 2.2.3.1 u trc : Trờn õu trc cú lp ai c khi ng, puly,bm... 2-Cũ m C cu iu chnh khe h thy lc duy trỡ khe h xu pỏp luụn bng 0 nh ỏp lc ca dõu v l 34 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.7 Kt cu con i thy lc 1-Piston y; 2-Bung ỏp sut thp; 3-ng dõu; 4-Lũ xo; 5-Bung dõu ỏp sut cao; 6-Lũ xo van bi; 7-Van bi Cam quay s nộn b pitton y v du trong bung ỏp sut cao Khi ú cũ m s ộp ti xu cỏch dựng b iu chnh khe h thy lc lm im ta Lũ xo y piston y i lờn, van... 0,94 0,98 1 0,98 0,94 0,87 0,77 0,64 0,12 0,15 0,18 0,21 0,23 0,24 0,24 0,24 0,23 0,21 0,18 0,15 0,16 0,19 0,21 0,23 0,24 0,25 0,24 0,23 0,21 0,19 0,16 0,12 0,08 0,04 0 17 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) 510 520 530 540 550 8,90 9,08 9,25 9,42 9,60 560 9,77 570 9,95 580 10,1 2 10,3 0 10,4 7 10,6 5 10,8 2 11,0 0 11,1 7 11,3 4 11,5 2 11,6 9 11,8 7 12,0 4 12,2 2 12,3 9 12,5 7 590 600 610 620... n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) ệTHậ CHUYN Vậ VN TC = 2 õọỹ/mm = 0.240 m/s.mm V v 0 Vmax 20 S( 40 V( S 60 80 100 120 140 160 180 0 1 2 1'' 3 2'' 3'' 4 4'' 5 5'' 6 6'' 7 7'' 8 9 10 3' 4' 5' 6' 7' 2' 8'' 1' 8' 9' 9''... tỏc: Ta tớnh T trong 1 chu k gúc cụng tỏc: ct = 180 180 4 = = 180 0 i 4 + Khi trc khuyu ca xylanh th nht nm v trớ 1 = 0 0 thỡ trc khuyu ca xylanh th hai nm v trớ 2 = 180 0 0 trc khuyu ca xylanh th ba nm v trớ 3 = 540 0 trc khuyu ca xylanh th t nm v trớ 4 = 360 Tớnh momen tng : T = T1 + T2 + T3 + T4 Tớnh giỏ tr ca Ttb bng cụng thc: 30.N i 10 3 Ttb = ( MN / m 2 ) R.FP n Trong ú : N i