1、NA系列滚针轴承的设计计算一、已知条件轴承型号NA4822轴承外径(D)140轴承内径(d)110轴承游隙(Gr)min滚针内径(Fw)120轴承宽度(B)30装配倒角rsmin1.1轴承游隙(Gr)max二、分步设计计算1.主参数优化1.1 滚针直径的选择：KDmin（D-Fw）DwKDmax（D-Fw）KDmin为：0.25KDmax为：0.36Dwmin为：5根据标准滚针的尺寸和本轴承用滚针的约束条件选择滚针为：Dw：61.2 滚针长度的确定：B-KLmax*DwLwB-KLmin*DwKLmin为：0.8KLmax为：2.1Dwmin为：17.4根据标准滚针的尺寸和本轴承用滚针的约束条
2、件选择滚针为：Lw:21.81.3 滚针个数的确定：*Dwp/(K2max*Dw)Z*Dwp/(K2min*Dw)K2min为：1.55K2max为：1.9Dwmin为：34.7228662根据设计经验、以往范列和轴承用钢球的特性确定钢球个数为：Z：1.4 轴承径向额定动载荷的：Cr=bm*fc*(Lwe)7/9*Z3/4*Dwe29/27；材料和加工质量修正系数bm:1.1几何形状、制造精度和材料系数fc:将各项参数值代入动载荷的计算公式得：Cr：(kN)92.371.5 轴承径向额定静载荷的：Cor=44*(1-Dwe/Dwp)*Z*Lwe*Dwe将各项参数值代入静载荷的计算公式得：Cor
3、：(kN)206.981.6 圆弧修正线母线修型滚针的设计测量点t1:t1=rmin0.4Qmax:Qmax=Cr/Zt:t=0.15(Lw-2t1)3.2:=3.85*10-5Qmax0.9/(Lw-2t1)0.8Rc:Rc=(Lw-2r)2-(Lw-2*t1-2*t)2)/8/8442.436182.套圈设计2.1 内外圈滚道直径di、De的确定：di=Fw；De=Fw+2*Dw内沟直径di:120di允差：-0.015/-0.030外沟直径De:132De允差：+0.051/+0.0232.2 外圈滚道宽度E的确定：E=Lc=Lw+E:222.3 挡边宽度C2：C2=0.5*(B-E)C
4、2:42.4 套圈挡边直径：D2=Dpw+KD2*DwKD2的值为：0.35外圈挡边直径D2：128.1D2允差：2.5 内圈两端锥面宽度a2:a2=C2-0.18*Dwa2:2.92.6 内圈两端锥面半锥角=11202.7 内圈滚道宽度E1的确定：E1=B-2*a2E1:24.22.8 内圈锥面直径d3:d3=di-0.4*a2d3:119.62.9 套圈润滑油孔、润滑油槽的确定：孔位置an:15an允差：0.1孔直径dy:5槽半径R:7R允差：+0.50槽深h:12.10 越程槽尺寸mmax:1m1max:0.52.11 装配倒角r与非装配倒角：由rsmin值为：1.1rsmax径向：2.
5、5装配倒角r径向：2轴向：4轴向：22.6 标志中心圆直径(Dk）的确定：Dk=(D-2*r径向max)+(D2max+2*r3)/2D2max为：128.11代入参数Dk为：132.42.7 标志面有效宽度(hw）的确定：hw=(D-2*r径向max)-(D2max+2*r3)/2代入参数hw为：2.62.8 标志字体高hz查表9为：1.53.M型保持架设计3.1 保持架中心圆直径Dcp:Dcp=DpwDcp:1263.2 保持架钢板厚度Sc:Sc=0.25*DwSc:1.53.3 保持架外径Dc:Dc=Dcp+ScDc:127.53.4 保持架内径Dc1:Dc1=Dcp-0.75*DwDc
6、1:121.53.5 保持架宽度Bc:Bc=Lw+(0.61.8)*DwBc:293.6 保持架窗孔圆周宽度bc:bc=Dw+0.1bc:6.13.7 保持架窗孔长度Lc:Lc=Lw+0.1Lc:21.93.8 窗孔端部至保持架断面宽度Sb:Sb=0.5(Bc-Lc)Sb：3.553.9 斜梁夹角2统一取为803.10 内横梁窗孔宽度bc2:bc2=(Dc1+2Sc)*sincos-1(Dc1+2Sc)2+Dcp2-Dw2)/(2*Dcp*(Dc1+2Sc)+0.05代入参数bc2:5.820.0500.090Dwmax为：7.2Dwp为：126Dwmax为：25.2Lwe为：19.6Dwma
7、x为：42.563513374273.422.200.003Fw允差：+0.058/+0.036E允差：+0.010C2允差：-0.1+0.010a2允差：-0.1d3允差：0.1dy允差：+0.30an允差：0.1r3:0.8r8:0.5轴承游隙(Gr)min轴承游隙(Gr)maxQmax:Qmax=Cr/Z:=3.85*10-5Qmax0.9/(Lw-2t1)0.8D2允差：Dcp允差：0.025Sc允差：0.05Dc允差：-0.250Dc允差：+0.250Bc允差：-0.2/-0.55bc允差：+0.05Lc允差：+0.01Sb允差：-0.1bc2允差：+0.053.10 内横梁窗孔宽度
8、bc2:bc2=(Dc1+2Sc)*sincos-1(Dc1+2Sc)2+Dcp2-Dw2)/(2*Dcp*(Dc1+2Sc)+0.05表1 Kw系数d=15，=25=40直径系列d35d35d35d3510.240.30 0.300.32-20.240.31 0.300.320.290.3250.300.3330.250.32 0.300.330.300.3250.300.335表2 优先采用的钢球公称直径Dw单位：mm钢球公称直径Dwmm相应的英制尺寸in钢球公称直径Dwmm相应的英制尺寸in钢球公称直径Dwmm相应的英制尺寸in0.31/642.3813/326.35 1/40.3972
9、.56.50.42.7787/646.74717/640.50.023 1/879/320.5083.1757.1440.63.57.50.6350.0253.5729/647.54119/640.683.9695/327.938 5/160.7480.7941/324.36611/648.33421/640.84.58.514.762 3/168.73111/321.1913/64516/64923/641.25.1599.1281.55.59.51.588 1/165.5567/329.525 3/81.9845.95315/649.9222 5/16610表3 深沟球轴承fc和fo系数D
10、wcos/DwpfcfoDwcos/Dwpfcfo0.0129.114.90.2159.813.70.0235.815.10.2259.613.50.0340.315.30.2359.313.20.0443.815.50.2459.013.00.0546.715.70.2558.612.80.0649.115.90.2658.212.50.0751.116.10.2757.712.30.0852.816.30.2857.112.10.0954.316.50.2956.611.80.1055.516.40.3056.011.60.1156.616.10.3155.311.40.1257.515.
11、90.3254.611.20.1358.215.60.3353.910.90.1458.815.40.3453.210.70.1559.315.20.3552.410.50.1659.614.90.3651.710.30.1759.814.70.3750.910.00.1859.914.40.3850.09.80.196014.20.3946.29.60.2059.9140.4048.49.4表10 t的值单位：mmd超过-3080到3080-t0.010.020.03表13 接触角的允差钢球直径Dw(mm)的允差超过到154.553.55453254.57+3/-5745+2/-440745
12、+3/-6表14 ymax与ymin值单位：mmdymax值ymin值超过到7000C型7000AC型7200B型7300B型-300.040.060.060.080.0330800.050.100.120.140.0580-0.060.140.150.160.07表18 Bc的允差单位：mmBc超过-10183050到10183050-允差-0.15-0.18-0.21-0.25-0.3表19 倒角e单位：mmDce超过到公称尺寸允差-300.2max-30500.3max-501200.3+0.2/-0.11201800.5+0.3/-0.21802600.5+0.3/-0.2表4 Ri及
13、Re的公差Dw超过-36101824到3610182430允差-+0.03+0.04+0.06+0.09+0.12表5 di与De的允差单位：mmd超过-3080120180250到3080120180250315di与De的允差0.0150.020.0250.030.040.05表6 ai和ae的允差d超过-1018305080到1018305080120a的允差0.0150.020.0250.030.040.045表7 k2i和k2e值15和2540直径系列12、32、3k2i0.35d25,0.350.65d25,0.40k2e0.35d25,0.350.6d25,0.40表8 d2与D
14、2的允差d2、D2超过1018305080120到18305080120180非引导档边 d2-0.18-0.21-0.25-0.30-0.35-0.40D2+0.18+0.21+0.25+0.30+0.35+0.40引导档边 d2-0.027-0.033-0.039-0.046-0.054-0.063D2+0.027+0.033+0.039+0.046+0.054+0.063表9 标志字体高hw Dk超过-305080120150超过到3050801201502000.81.20.70.70.711-1.21.80.70.71111.511.51.831111.511.51.521.5237
15、-1.51.5222.5710-22.5310-334表11 t的允差单位：mmt超过-0.070.100.200.290.39到0.070.100.200.290.39-允差-0.01-0.015-0.02-0.03-0.04-0.05表12 各级轴承选用的钢球公差等级及允差轴承公差等级钢球直径Dw(mm)钢球精度等级钢球直径允差（m）超过到不低于P2-18G58.51830G1010.5P4-18G1010.51830G1617P5-30G16173050G2017P6、P0-18G16171830G20173050G28175080G4022表15 轴承宽度的允差d000系列200系列3
16、00系列超过到上偏差下偏差上偏差下偏差上偏差下偏差-100-0.20-0.20-0.210180-0.30-0.30-0.318300-0.30-0.30-0.430500-0.30-0.30-0.450800-0.30-0.40-0.5801200-0.50-0.50-0.81201800-0.50-0.50-0.81802500-0.50-0.80-0.8表16 i和e的值d2、D2超过-18305080120到18305080120180i的值0.200.250.300.350.400.45e的值0.250.300.350.400.50.60表17 ai和ae的允差Dc1、Dc超过610
17、18305080到1018305080120Dc1的允差+0.09+0.11+0.13+0.16+0.19+0.22Dc的允差-0.15-0.18-0.21-0.25-0.30-0.35单位：mm304050405060+0.14+0.18+0.22单位：mm1201802501802503150.050.060.065单位：mm180250315250315400-0.46-0.52-0.57+0.46+0.52+0.57-0.072-0.081-0.089+0.072+0.081+0.089单位：mm200-34单位：mm1802602603600.500.550.70.80单位：mm120180180250+0.25+0.29-0.40-0.46图图1 1图图2 2
