弹簧设计计算

1、方案二采用复合组合碟形弹簧复合组合碟形弹簧设计计算一、碟簧片数i计算i二Fcz/F（机械设计手册第2卷P7-31表72-6中的公1、碟簧压缩工作载荷F计算（1）要求摩擦片传递转矩为：Mf=400Nm=40Kgm（2）取摩察系数二0.35（无纲量）（3）取摩察片外径D=2R2=125mm=0.125m,内径d=2R1=40mm二0.04m。取碟簧总喪在摩擦片上，取半径为r,宽度为dr的环带，环带所受的工作载荷：Fr=qX2nrXdr=(F/n(R22-Rl2)X2nrXdrFr=qX2nrXdr=F/n(R22-R)X2rXdr=2Fr(5)环带所受的摩擦力矩为：Mr二FrXuXr二uXrX2F

2、XrXdr/(R22-Rj2):（6）作用在摩擦片上的总摩擦力矩（单面）为：Mf=fr严M,dr二Jr/22uF-r2-dr/(R22-R/)=2/3XFur3X1/(R22-R)|R1R2=2/3XFuR23/(R22-Ri2)-2/3XFuRJ/(Rj=2/3XFu(R23-Ri3)/(R22-Ri2)1作用在摩擦片上的总摩擦力矩（双面）为：Mf=4/3XFu(R23-R13)/(R22-Ri2)（7）碟簧工作载荷F二3业（R?2-R】2）/4u（RJ-IV）JXiM-4:QZJ草憐WJIE,半1乂：i、/nr；斗4hi弹簧工作载荷F计算(Knm)R：(m)Rx(m)F(Kg)400.06

3、0.020.351318.6813F=131&681(Kg)=13186.81(N)Mf(Kg.m)R2(m)400.062、碟簧设计计算计算数据:拟采用外径100mm的碟形复合组合弹簧计算数据（从表7.2-2查得）弹簧D（外径）/mmd(内径)/mmt（弹簧厚度）/mmh0（碟簧压平时变形量/mmHo（自由咼度）mmA1001005162.28.2B100100513.52.86.3C100100512.73.56.2由C二D/d二100/51二1.96从表7.2-5查得系数K】二0.686D（外径）/mmd(内径)/mmC100511.96(1)采用A系列外径D二100mm碟形复合组合弹簧

4、(A100-1GB/T1972-1992)C二(t/t)2/(H0/41-t7t+3/4)(5H0/8t-tVt+3/8):将t用t代替弹簧HO（自由高度）/mmt（弹簧厚度）/mmc2A1008.2648.603B1006.33.511.000C1006.22.74.809C产l/(Ho/4t一1/4)(5H0/8t一5/8)1弹簧HO（自由高度）/mmt（弹簧厚度）/mmCiA1008.2647.603B1006.33.510.000C1006.22.73.809C2二C/(t/t)3X5/32X(H/t-1)2+1；将1/用t代替C?二CX5/32X(H()/t-1严+1；Ki计算二(C

5、/2-C1/2+C2)弹簧Cl1C2K|K?取值Cl/2A10047.60348.6033.9106123.8017B10010.00011.0001.00005.0000C1003.8094.8091.00001.9043碟簧压平时需用载荷计算：Fc由C二D/d二100/51二1.96,从表72-5查得KO.686碟簧压平时需用载荷：Fc=4E/(l-M2)X(t3h0K42/(K1D2)弹簧E(弹性模量MPa)2.06X105u（泊松比）t(mm)h0(mm)k4A1002060000.362.21.0000B1002060000.33.52.81.0000C1002060000.32.7

6、3.51.0000从上面的计算结果看出：A100、B100系列的碟簧压平时的承载能力Fc（分别为95921以采用A100、B100系列的碟簧均能满足要求。而C100碟簧不能满足要求。碟簧片数（i）计算弹簧h(am)t(mm)F(N)FC(N)h/tA1002.2613186.8162724.630.367B1002.83.513186.8115846.150.800依据h0/t；F/Fc由特性曲线图7.2-2查得：f/ho之比值（珀：在工作载荷F下的变刃弹簧h0/tF/Fcfi/ho（査表得岀）h0(mm)(mm)A1000.3670.2100.182.20.396B1000.8000.832

7、0.7252.82.03由i二fz,得岀碟簧对数如F：（f2=10mm）弹簧fi(mm)f2(mm)1i（取值）A1000.3961025.25325B1002.03104.9265复合碟簧总高度:Hz二iXHo弹簧i（取值）HoHzA100258.2205B1OO56.331.5结论：采用B100复合组合碟形弹簧；碟簧参数如下弹簧D（外径）/mmd（内径）/mmt（弹簧厚度）/mmh0（碟簧压平时变形量）/mmHo（自由咼度）mmB100100513.52.86.3式）dr/(R22-Ri2)=2uFr2dr/(R22-R)J-Ri2)m停你血|勺1工，半验算Ri(m)u(R23-Rl3)(

8、R22-R12)3Mt(K2“-R12、0.020.350.0002080.00320.384f=0.75hoFo（许用载荷）/Nf（变形量）伽oi或。m/Mpa480001.651420131002.1105086102.6312405/32HO/tHO/t-1(H0/t-l)25/32X(H0/t-l)20.156251.3666666670.3666666670.1344444440.021006944C1/2+C2(Cl/2+2)*:Cl/2-(C1/2+C2)Cl/2-(C1/2+C2)72.40508.509115.29253.910616.00004.00001.00001.00006.71302.5909D(mm)KiFC(N)4*E1-u21000.68662724.638240000.911000.68615846.151000.6869093.299N和15846N)均大于工作载荷F(13186.81N),所乡量)碟簧片数碟簧总自由高度Hz(mm)531.54u(R23-Rl3)3Mt(K2Z-Klz)/L4U(K才-PPM0.0