脂润滑深沟球轴承额定寿命和修正额定寿命计算

工作条件污染级别颗粒尺寸约为润滑油膜厚度实验室条件极度清洁仔细清洗、极洁净安装；密封相对工作条件优良；连续或在很短的间隔内再加脂脂润滑（终身润滑）密封轴承，且密封能力相对工作条件有效。高度清洁清洗、洁净安装；密封相对工作条件良好；按照制造厂的规定再加脂润滑（终身润滑）密封轴承，密封能力相对工作条件适当，如防尘轴承。一般清洁洁净安装；密封能力相对工作条件一般；按照制造厂的规定再加脂。轻度至常见污染在车间安装；安装后，轴承和应用场合未充分清洗；密封能力相对工作条件较差；再加脂间隔长于制造厂推荐的时间，严重污染在污染的环境下安装；密封不适；再加脂间隔长。极严重污染公称接触角α=球的列数i=每列的球数Z=球直径Dw=球组节圆直径Dpw=内圈沟道曲率半径ri=外圈沟道曲率半径re=轴向载荷Fa=1.轴承的参数表1脂润滑的污染系数ec脂润滑轴承额定寿命和修正额定寿命的计算摘自《GB/T6391-2010滚动轴承额定动载荷和额定寿命》和《GB/Z32332.1-2015滚动轴承对ISO281的注释第1部分：基本额定动载荷和基本额定寿命》径向载荷Fr=转速n=修正额定寿命可靠度S=常用优质淬硬轴承钢和良好加工方法的额定系数bm=工作温度下润滑剂的实际运动黏度（查图1）ν=脂润滑的污染级别（查表1）径向基本额定动载荷Cr===径向基本额定静载荷C0r==径向当量动载荷Pr===基本额定寿命L10==L10h=修正额定寿命Lnm==Lnmh=与轴承零件几何形状、不同零件制造精度以及材料有关的系数fc==γ==λ=0.089A1=2.运算过程3.参数选取径向载荷系数X1==轴向载荷系数Y1==ξ=η==Fa/iZDw2=参考α'角度Fa/iZDw2无法提供参考0.17237无法提供参考0.34474无法提供参考0.68948无法提供参考1.03421无法提供参考1.37895无法提供参考2.0684无法提供参考3.4474无法提供参考5.1711无法提供参考6.8948实际接触角(近似值)α'=寿命离散度，即试验确定的韦布尔斜率e==可靠度寿命修正系数a1==为达到充分润滑条件所要求的参考运动黏度ν1===黏度比к==脂润滑的污染系数ec======与轴承零件几何形状及应力水平有关的系数f0=疲劳载荷极限Cu===向心球轴承的寿命修整系数aISO====γ计算值实取值0.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.240855172f0系数0.2408551720.2408551720.24085517212.982896550.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.2408551720.240855172图1工作温度下润滑剂的实际运动黏度注：VG代表40℃的基油黏度01817.46272.59.080249.0802401.轴承的参数脂润滑轴承额定寿命和修正额定寿命的计算摘自《GB/T6391-2010滚动轴承额定动载荷和额定寿命》和《GB/Z32332.1-2015滚动轴承对ISO281的注释第1部分：基本额定动载荷和基本额定寿命》80005000901.320极度清洁bmfc（icosα）0.7Z2/3Dw1.83.647bmfc（icosα）0.7Z2/3Dw1.452758.30183f0iZDw2cosα31670.10851FrX1Fr+Y1Fa8000(Cr/Pr)3286.8153982956.0513274a1aISOL104711.98218415706.607280.089A10.41λ2ri/(2ri-Dw)0.41γ0.3(1-γ)1.39/(1+γ)1/3{1+[1.04(1-γ)/(1+γ)1.72ri/re(2re-Dw)/(2ri-Dw)0.41]10/3}-3/1058.95468097Dwcosα/Dpw0.2408551720.9598.06652.运算过程3.参数选取1-0.4ξ/η10.4cotα'/η01.051-sin5°/2.50.9651377030α'10.2311.81113.73415.03716.04817.60719.80921.76123.263ξtanα'0.95[ln(100/S)/ln(100/90)]2/3+0.05145000n-0.83Dpw-0.54500n-0.5Dpw-0.57.474093187ν/ν12.6759099060.0864к0.68Dpw0.55(1-0.6796/Dpw1/3)0.0432к0.68Dpw0.55(1-1.141/Dpw1/3)0.0177к0.68Dpw0.55(1-1.887/Dpw1/3)0.0115к0.68Dpw0.55(1-2.662/Dpw1/3)0.00617к0.68Dpw0.55(1-4.06/Dpw1/3)112.98289655C0r/22(100/Dpw)0.5C0r/221439.5503870.1[1-(2.5671-2.2649/к0.054381)0.83(ecCu/Pr)1/3]-9.30.1[1-(2.5671-1.9987/к0.19087)0.83(ecCu/Pr)1/3]-9.30.1[1-(2.5671-1.9987/к0.071739)0.83(ecCu/Pr)1/3]-9.316.42862347中介值00.010.020.030.040.050.060.070.080.090.10.110.120.130.140.150.160.170.180.190.20.21f0系数0.220.230.240.250.260.270.280.290.30.310.320.330.340.350.360.370.380.390.4→目录°列粒mmmmmmmmN1.轴承的参数脂润滑轴承额定寿命和修正额定寿命的计算摘自《GB/T6391-2010滚动轴承额定动载荷和额定寿命》和《GB/Z32332.1-2015滚动轴承对ISO281的注释第1部分：基本额定动载荷和基本额定寿命》Nr/min%mm2/s(cst)(Dw≤25.4mm)(Dw＞25.4mm)NNFa/Fr≤eFa/Fr＞eN百万转h百万转h0.089A10.41λ2ri/(2ri-Dw)0.41γ0.3(1-γ)1.39/(1+γ)1/3{1+[1.04(1-γ)/(1+γ)1.72ri/re(2re-Dw)/(2ri-Dw)0.41]10/3}-3/102.运算过程3.参数选取N/mm2°n1000r/minn≥1000r/minmm2/s高度清洁一般清洁轻度至常见污染严重污染极严重污染Dpw≤100mmDpw＞100mmN0.1≤к＜0.40.4≤к＜11≤к≤4，к＞4中介值14.714.915.115.315.515.715.916.116.316.516.416.115.915.615.415.214.914.714.414.21413.7f0系数13.513.21312.812.512.312.111.811.611.411.210.910.710.510.3109.89.69.4