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轴承型号NA4822轴承外径(D)140轴承内径(d)110滚针内径(Fw)120轴承宽度(B)30装配倒角rsmin1.1KDmin为：0.25KDmax为：0.36Dwmin为：5Dw：6KLmin为：0.8KLmax为：2.1Dwmin为：17.4Lw:21.8K2min为：1.55K2max为：1.9Dwmin为：34.72286621.1Cr：(kN)Cor：(kN)0.43.28442.43618120di允差：132De允差：E:22C2:40.35外圈挡边直径D2：128.1a2:2.9E1:24.2d3:119.6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:1mmax:1m1max:0.5由rsmin值为：1.1径向：2.5径向：2轴向：4轴向：2D2max为：128.11132.42.62.4套圈挡边直径：D2=Dpw+KD2*Dw2.1内外圈滚道直径di、De的确定：di=Fw；De=Fw+2*DwD2允差：KD2的值为：2.6标志中心圆直径(Dk）的确定：Dk=((D-2*r径向max)+(D2max+2*r3)/2-0.015/-0.030+0.051/+0.0232.2外圈滚道宽度E的确定：E=Lc=Lw+ε2.3挡边宽度C2：C2=0.5*(B-E)内沟直径di:外沟直径De:2.9套圈润滑油孔、润滑油槽的确定：2.10越程槽尺寸NA系列滚针轴承的设计计算一、已知条件轴承游隙(Gr)min轴承游隙(Gr)max1.1滚针直径的选择：KDmin（D-Fw）≤Dw≤KDmax（D-Fw）1.主参数优化二、分步设计计算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：1.3滚针个数的确定：π*Dwp/(K2max*Dw)≤Z≤π*Dwp/(K2min*Dw)1.2滚针长度的确定：B-KLmax*Dw≤Lw≤B-KLmin*Dw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：将各项参数值代入动载荷的计算公式得：92.371.4轴承径向额定动载荷的：Cr=bm*fc*(Lwe)7/9*Z3/4*Dwe29/27；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：材料和加工质量修正系数bm:1.6圆弧修正线母线修型滚针的设计几何形状、制造精度和材料系数fc:2.套圈设计将各项参数值代入静载荷的计算公式得：206.98测量点t1:t1=rmint:t=0.15(Lw-2t1)δ:δ=3.85*10-5Qmax0.9/(Lw-2t1)0.8Qmax:Qmax=Cr/Z1.5轴承径向额定静载荷的：Cor=44*(1-Dwe/Dwp)*Z*Lwe*DweRc:Rc=((Lw-2r)2-(Lw-2*t1-2*t)2)/8/δ2.5内圈两端锥面宽度a2:a2=C2-0.18*Dw2.6内圈两端锥面半锥角β=11°20′2.7内圈滚道宽度E1的确定：E1=B-2*a22.8内圈锥面直径d3:d3=di-0.4*a2代入参数hw为：代入参数Dk为：2.7标志面有效宽度(hw）的确定：hw=((D-2*r径向max)-(D2max+2*r3))/22.11装配倒角r与非装配倒角：rsmax装配倒角r1.5Dcp:126Sc:1.5Dc:127.5Dc1:121.5Bc:29bc:6.1Lc:21.9Sb：3.555.823.M型保持架设计3.1保持架中心圆直径Dcp:Dcp=Dpw2.8标志字体高hz查表9为：3.7保持架窗孔长度Lc:Lc=Lw+0.13.8窗孔端部至保持架断面宽度Sb:Sb=0.5(Bc-Lc)3.9斜梁夹角2β统一取为80°3.10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bc2:3.2保持架钢板厚度Sc:Sc=0.25*Dw3.3保持架外径Dc:Dc=Dcp+Sc3.4保持架内径Dc1:Dc1=Dcp-0.75*Dw3.5保持架宽度Bc:Bc=Lw+(0.6 ～1.8)*Dw3.6保持架窗孔圆周宽度bc:bc=Dw+0.10.0500.090Dwmax为：7.2Dwp为：126Dwmax为：25.2Lwe为：19.6Dwmax为：42.563513372.200.003Fw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：±0.1r3:0.8r8:0.52.4套圈挡边直径：D2=Dpw+KD2*Dw2.1内外圈滚道直径di、De的确定：di=Fw；De=Fw+2*DwD2允差：2.6标志中心圆直径(Dk）的确定：Dk=((D-2*r径向max)+(D2max+2*r3)/2NA系列滚针轴承的设计计算一、已知条件轴承游隙(Gr)min轴承游隙(Gr)max1.1滚针直径的选择：KDmin（D-Fw）≤Dw≤KDmax（D-Fw）1.主参数优化二、分步设计计算1.3滚针个数的确定：π*Dwp/(K2max*Dw)≤Z≤π*Dwp/(K2min*Dw)1.2滚针长度的确定：B-KLmax*Dw≤Lw≤B-KLmin*Dw421.4轴承径向额定动载荷的：Cr=bm*fc*(Lwe)7/9*Z3/4*Dwe29/27；1.6圆弧修正线母线修型滚针的设计2.套圈设计73.42δ:δ=3.85*10-5Qmax0.9/(Lw-2t1)0.8Qmax:Qmax=Cr/Z1.5轴承径向额定静载荷的：Cor=44*(1-Dwe/Dwp)*Z*Lwe*Dwe2.7标志面有效宽度(hw）的确定：hw=((D-2*r径向max)-(D2max+2*r3))/22.11装配倒角r与非装配倒角：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.M型保持架设计3.10内横梁窗孔宽度bc2:bc2=(Dc1+2Sc)*sincos-1(((Dc1+2Sc)2+Dcp2-Dw2)/(2*Dcp*(Dc1+2Sc)))+0.05d≤35d≥35d≤35d≥350.24～0.300.30～0.32--0.24～0.310.30～0.320.29～0.3250.30～0.330.25～0.320.30～0.330.30～0.3250.30～0.3350.32.3813/326.351/40.3972.56.50.42.7787/646.74717/640.5370.5083.1757.1440.63.57.50.6353.5729/647.54119/640.683.9695/327.9385/160.7480.7944.36611/648.33421/640.84.58.514.7623/168.73111/321.191591.25.1599.1281.55.59.51.5881/165.5567/329.5253/81.9845.95315/649.92225/16610Dwcosα/DwpfcfoDwcosα/Dwpfcfo0.0129.114.90.2159.813.70.0235.815.10.2259.613.50.0340.315.30.2359.313.20.0443.815.50.2459.013.00.0546.715.70.2558.612.80.0649.115.90.2658.212.50.0751.116.10.2757.712.30.0852.816.30.2857.112.10.0954.316.50.2956.611.80.1055.516.40.3056.011.60.1156.616.10.3155.311.40.1257.515.90.3254.611.20.1358.215.60.3353.910.90.1458.815.40.3453.210.70.1559.315.20.3552.410.50.1659.614.90.3651.710.30.1759.814.70.3750.910.01/8表3深沟球轴承fc和fo系数1/329/3216/64直径系列123α=15°，α=25°α=40°表1Kw系数相应的英制尺寸ind钢球公称直径Dwmm相应的英制尺寸in表2优先采用的钢球公称直径Dw钢球公称直径Dwmm0.02钢球公称直径Dwmm相应的英制尺寸in单位：mm23/640.0253/641/640.1859.914.40.3850.09.80.196014.20.3946.29.60.2059.9140.4048.49.4超过-3080到3080-0.010.020.03超过到4.555454.57745745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超过-10183050到10183050--0.15-0.18-0.21-0.25-0.3超过到-30305050120120180180260表10δt的值单位：mmd40°表13接触角的允差dymax值ymin值表14ymax与ymin值单位：mmα钢球直径Dw(mm)α的允差15°δt25°+3°/-5°+2°/-4°+3°/-6°±3.5°±3°Bc允差表18Bc的允差单位：mm单位：mmDc公称尺寸允差0.2max-0.3max-0.3+0.2/-0.10.5+0.3/-0.20.5+0.3/-0.2e表19倒角e超过-36101824到3610182430-+0.03+0.04+0.06+0.09+0.12d超过-3080120180250到3080120180250315±0.015±0.02±0.025±0.03±0.04±0.05超过-1018305080到1018305080120±0.015±0.02±0.025±0.03±0.04±0.04540°12、32、3d≤25,0.35d＞25,0.40d≤25,0.35d＞25,0.40超过1018305080120到18305080120180d2-0.18-0.21-0.25-0.30-0.35-0.40D2+0.18+0.21+0.25+0.30+0.35+0.40d2-0.027-0.033-0.039-0.046-0.054-0.063D2+0.027+0.033+0.039+0.046+0.054+0.063hwDk超过-305080120150超过到3050801201502000.81.20.70.70.711-1.21.80.70.7111～1.51～1.51.83111～1.51～1.51.5～21.5～237-1.51.5222.5710---22.5310----334单位：mmda的允差d2、D2表7k2i和k2e值引导档边表8d2与D2的允差表9标志字体高非引导档边Dw允差表4Ri及Re的公差表5di与De的允差表6ai和ae的允差α15°和25°直径系列k2ik2e0.350.350.650.6di与De的允差超过-0.070.100.200.290.39到0.070.100.200.290.39--0.01-0.015-0.02-0.03-0.04-0.05超过到-181830-181830-303050-18183030505080超过到上偏差下偏差上偏差下偏差上偏差下偏差-100-0.20-0.20-0.210180-0.30-0.30-0.318300-0.30-0.30-0.430500-0.30-0.30-0.450800-0.30-0.40-0.5801200-0.50-0.50-0.81201800-0.50-0.50-0.818025