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1、CRB Overview.ppt,1,Clearances 游隙,Other Type=Radial Internal Clearance 其它类型=径向内部游隙,CRB Overview.ppt,2,Clearances 游隙,Internal radial clearances affect bearing performance 内部径向游隙影响轴承的性能Clearances are selected based upon:选择游隙基于：Fitting practice 公差配合Temperature gradients 温度梯度Desired operating RIC 想要达到的径向
2、内部游隙,Operating RIC=Initial RIC-reduced RIC by fits-reduced RIC by thermal运行时的RIC=初始RIC-通过配合减少的RIC-通过热量减少的RIC,CRB Overview.ppt,3,Clearances 游隙,Clearance reduced by interference fits:通过过盈配合来减少游隙：Total radial internalclearance reduction is:总的径向内部游隙减少量为：,Where:P=total RIC reduction P=RIC总减少量,Assumptions
3、:假设Solid shaft 实心轴Large housing OD 大轴承架外径Similar materials 类似的材料 between bearing and mounting components 在轴承和装配件之间,CRB Overview.ppt,4,Clearances 游 隙,Clearance reduced by thermal gradients 通过热量差减少游隙Reduced RIC by thermal=a x DT x Inner Ring OD 通过热量减少的RIC=a x DT x 内圈外径,Where:=coefficient of thermal ex
4、pansion 热膨胀系数DT=temperature gradient between inner and outer race 在内滚道和外滚道之间的温度差,CRB Overview.ppt,5,Clearances 间隙,Select an RIC*选择一个RICC type All new CRB designs will conform to the ISO standard 所有新的CRB设计将遵照ISO标准R type Old Torrington designsmay still be encountered 旧的托林顿设计还是可能碰到Special clearances 特殊
5、的游隙Mod codes can be created to control more critical applications 建立修正编码以控制更多的临界应用,*RIC specs in Service Catalog p.E21 在服务目录E21页中的RIC规格,CRB Overview.ppt,6,Clearances 间隙,PART#:23332YMW33C4=Spherical Roller Bearing Bearing O.D.340/339.957 Housing Bore 339.910/339.946Housing Fit 0.011 T/0.090 T Bearing Bore 160/159.974 Shaft O.D.159.933/159.959 Shaft Fit 0.015 L/0.067 L R.I.C Before 0.221/0.279 mmR.I.C.After 0.145/0.269 mm,RIC Setting Example,
