机械原理课程设计编程说明书]目录1.设计任务及要求⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2.数学模型的建立⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯3.程序框图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯4.程序清单及运行结果⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯5．设计总结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯6.参考文献⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1.设计任务及要求已知:齿轮10,20,49,2121mZZ模数分度圆压力角,齿轮为正常齿制，工作情况为闭式传动。要求：1)选择变位系数21xx、。2)计算该对齿轮传动的各部分尺寸。3)以2号图纸绘制齿轮传动的啮合图。2.数学模型1)中心距a的确定：2)(21zzma；a=（a/5+1）5；2)实际啮合角：；)cos('2)()cos(21azzminvzzxxinv)/()(tan22121；3)分配变位系数21xx、；17sin22minahzmin1minmin1/)(zzzhxa；min2minmin2/)(zzzhxa；；tan2))((2121zzinvinvxx4）中心距变动系数y=(aa)/m；5)齿轮基本参数：（注：下列尺寸单位为mm）模数：m=10压力角：20齿数：1z=212z=49齿顶高系数：0.1ah齿根高系数：25.0c传动比：12/zzi齿顶高变动系数：yxx21分度圆直径；11mzd22mzd基圆直径；cos11mzdbcos22mzdb齿顶高：)(11xhmhaa)(22xhmhaa齿根高：)(11xchmhaf)(22xchmhaf齿顶圆直径：1112aahdd2222aahdd齿根圆直径；1112ffhdd2222ffhdd节圆直径：coscos11ddcoscos22dd4)重合度：)]tan(tan)tan(tan[212211aazz)/(cos1111abadd)/(cos2212abadd5）一般情况应保证2.15)齿距：mp6)节圆齿距：coscospp7)基圆齿距：cosmpb8)齿顶圆齿厚：)(2111111invinvrrrssaaaa)(2222222invinvrrrssaaaa一般取25.0as9)基圆齿厚：)(tanarccos)s[tan(arcco111111111ababbbbdddddddss)(tanarccos)s[tan(arcco222222222ababbbbdddddddss10)分度圆齿厚：tan22111mxmstan22122mxms11)展角：11111arccos)tan(arccosddddbb22222arccos)tan(arccosddddbb3.程序框图输入mz1z2ha*c*计算aayd1d2db1db2d1d2计算Xmin1Xmin2Yx1﹤Xmin1x2﹤Xmin2N计算ha1ha2hf1hf2da1da2s1s2sb1sb2sa1sa212ppbpYsa﹤0.25mN计算Y﹤1.2N计算ha1ha2hf1hf2da1da2s1s2sb1sb2sa1sa212输出计算结果4．清单及运行结果1）M文件m=10;t=(20*pi)/180;z1=21;z2=49;hax=1.0;cx=0.25;zmin=17;x1min=hax*(zmin-z1)/zminx2min=hax*(zmin-z2)/zmina=0.5*m*(z1+z2)i=a/5ai=(i+1)*5ti=acos(a*cos(t)/ai)xs=(tan(ti)-ti-(tan(t)-t))*(z1+z2)*0.5/tan(t)y=(ai-a)/mI=z2/z1cgm=xs-yd1=m*z1d2=m*z2db1=d1*cos(t)db2=d2*cos(t)d1i=d1*cos(t)/cos(ti)d2i=d2*cos(t)/cos(ti)p=pi*mppi=p*cos(t)/cos(ti)pb=pi*m*cos(t)j=-rand(1,50)fori=1:50if(j(1,i)>x1min)&((xs-j(1,i))>x2min)x1=j(1,i)x2=xs-j(1,i)ha1=m*(hax+x1-cgm)ha2=m*(hax+x2-cgm)hf1=m*(hax+cx-x1)hf2=m*(hax+cx-x2)da1=d1+2*ha1da2=d2+2*ha2df1=d1-2*hf1df2=d2-2*hf2ta1=acos(db1/da1)ta2=acos(db2/da2)e=(z1*(tan(ta1)-tan(ti))+z2*(tan(ta2)-tan(ti)))/(2*pi)s1=0.5*pi*m+2*x1*m*tan(t)s2=0.5*pi*m+2*x2*m*tan(t)sa1=s1*da1/d1-da1*(tan(acos(db1/da1))-acos(db1/da1)-(tan(t)-t))sa2=s2*db2/d2-da2*(tan(acos(db2/da2))-acos(db2/da2)-(tan(t)-t))if((sa1<(0.25*m))&(e<1.2))endbreakendendsb1=s1*db1/d1-db1*(tan(acos(db1/db1))-acos(db1/db1)-(tan(t)-t))sb2=s2*db2/d2-db2*(tan(acos(db2/db2))-acos(db2/db2)-(tan(t)-t))theta1=tan(acos(db1/d1i))-acos(db1-d1i)theta2=tan(acos(db2/d2i))-acos(db2/d2i)2）运行结果>>changex1min=-0.2353x2min=-1.8824a=350i=70ai=355ti=0.3859xs=0.5257y=0.5000I=2.3333cgm=0.0257d1=210d2=490db1=197.3355db2=460.4494d1i=213d2i=497p=31.4159ppi=31.8647pb=29.5213j=Columns1through11-0.9501-0.2311-0.6068-0.4860-0.8913-0.7621-0.4565-0.0185-0.8214-0.4447-0.6154Columns12through22-0.7919-0.9218-0.7382-0.1763-0.4057-0.9355-0.9169-0.4103-0.8936-0.0579-0.3529Columns23through33-0.8132-0.0099-0.1389-0.2028-0.1987-0.6038-0.2722-0.1988-0.0153-0.7468-0.4451Columns34through44-0.9318-0.4660-0.4186-0.8462-0.5252-0.2026-0.6721-0.8381-0.0196-0.6813-0.3795Colu...
