轮系习题例1如图,已知轮系中各轮齿数,Z1=20,Z2=50,Z2‘=15,Z3=30,Z3‘=1,Z4=40,Z4’=18,Z5=54,求i15和提起重物时手轮转向?600181152054403050''3'215432154ZZZZZZZZi解:重物手轮Z1Z2‘Z2Z3Z3’Z4Z4‘Z5例2已知轮系中各轮齿数,Z1=27,Z2=17,Z3=99,n1=6000r/min,求i1H和nH0313313113nZZnnnnnniHHHHH26.311311ZZnniHH12H3解:1)转向相同111,min/184026.36000nnrinnHHH12H3设n1转向为正,则2)方向相反与121221min,/4767nrnZZnnnnHH解:213223113)1(ZZZZiHHH代入上式03100100991011'21321ZZZZH100001100009999111HHiiHH1110000例3如图所示的外啮合周转轮系中,已知Z1=100,Z2=101,Z2'=100,Z3=99,求系杆H与齿轮1之间的传动比iH1。Z1Z2Z'2Z3解:10010010010121323113ZZZZiHHH100111HHi10011HHi例3如图所示的外啮合周转轮系中,已知Z1=100,Z2=101,Z2'=100,Z3=99,求系杆H与齿轮1之间的传动比iH1。Z1Z2Z'2Z3若将Z3由99改为100,则例4图示圆锥齿轮组成的周转轮系中,已知Z1=20,Z2=30,Z2‘=50,Z3=80,n1=50r/min.求系杆H转速。'213231ZZZZnnnnHH设n1转向为正,则1322′等式右边的符号是在转化轮系中确定的。50208030050HHnn与n1转向相同min/7.14rnH解:例4如图为标准圆柱直齿轮传动系统,已知Z1=60,Z2=20,Z2‘=25,各轮模数相等,求1)Z3;2)若已知n3=200r/min,n1=50r/min,n3,n1转向如图,求系杆H转速大小和方向;3)若n1方向与图中相反时,则系杆H转速大小和方向如何?'21323113ZZZZnnnniHHH解:1)首先根据同心条件求出Z3o1Z1Z2Z'2Z3n1n3o3)(21)(213'221ZZmZZm153Z2)2560152020050HHnn即min/75rnH转速与n1一致例4如图为标准圆柱直齿轮传动系统,已知Z1=60,Z2=20,Z2‘=25,各轮模数相等,求1)Z3;2)若已知n3=200r/min,n1=50r/min,n3,n1转向如图,求系杆H转速大小和方向;3)若n1方向与图中相反时,则系杆H转速大小和方向如何?解:3)当n1方向相反时,以-50r/min代入,则o1Z1Z2Z'2Z3n1n3o32560152020050HHnnmin/33.8rnH转速仍与n1一致例5如图所示为用于自动化照明灯具上的周转轮系,已知输入轴转速n1=19.5r/min,各轮齿数Z1=60,Z2=Z2‘=30,Z3=40,Z4=40,Z5=120,试求箱体转速?解:n5=0Z1Z2Z'2Z34'2153235115)1(ZZZZZZnnnniHHHmin/5.6rnH转速与n1一致Z4Z5箱体H1'4'23'H45例6已知Z1=30,Z2=30,Z2‘=20,Z3=90,Z3’=40,Z4=30,Z4’=30,Z5=15,Z1‘=40,求iⅠⅡ13ⅠⅡ解:iⅠⅡ=i4H1331ZZnnnnHH313'3'1ZZnnnnHH在定轴轮系中:在周转轮系中:4'1'144'143nnZZnn4'3'344'343nnZZnn3844HHnnii45H21例7已知Z1=12,Z2=51,Z3=76,Z4=49,Z5=12,Z6=73,求此混合轮系传动比i1H3解:6在周转轮系中:466446ZZnnnniHHH在定轴轮系中:1221ZZnn142174nnn1331ZZnn163193nnn3940611HHnni45621例8如图所示轮系,已知锥齿轮齿数Z1=Z4=55,Z5=50,其余各圆柱直齿轮齿数Z1‘=100,Z2=Z2’=Z3=Z4‘=20,n6=3000r/min,转向如图,求n4、n1大小和方向解:2’31’4‘n6在周转轮系中:513'2'1432'4'141'''ZZZZZZnnnniHHH在定轴轮系中:114514514ZZZZZZi解得:反向与同向与6'446'11min,/2000min,/2000nrnnnrnnExample9:ThenumbersofteethofthegearsinthegeartrainaregivenasZ1,Z2,Z3,Z4,Z5andZ6.Calculatethetrainratioi1H2.123H5H46120316012H45H2Solution:Dividingthegeartrainintosubtrains(1)InthePlanetarygeartrain1-2-3-H1(=4).,4341413i123H5H46120316012H45H21412132ZZZZ13ZZ13411ZZ(2)InthePlanetarygeartrain4-5-6-H2,2624246HHHi46241ZZH123H5H46120316012H45H25465ZZZZ46ZZ124H13411ZZ(3)Solvetheequationssimultaneously,2121HHi123H5H46120316012H45H213411ZZ461311ZZZZ))((2441H46241ZZHExample10Areducerofahoist(提升机)isshowninFig.Numbersofteethofallthegearsaregiven.Findthetrainratioi15.Solution:DividingthegeartrainintosubtrainsZZZZZZZ212'533'4=======213330187878242-2'13H3'5(a)(b)43'522'135(c)(d)3'54Inthedifferentialgeartrain1-2=2’-3-5,Intheordinarygeartrain3’-4-5,5351513i5'35'3i5353’ZZZZZZZZZ212'533'4=======213330187878242-2'13H3'5(a)(b)43'522'135(c)(d)3'545335’ZZ2132’ZZZZInthedifferentialgeartrain1-2=2’-3-5,ZZZZZZZ212'533'4=======213330187878242-2'13H3'5(a)(b)43'522'135(c)(d)3'54553551’ZZ11/3551’ZZ2132’ZZZZ5351513i2132’ZZZZ5115i1)11878(21247833+1)1(352132’’ZZZZZZ24.28