How to improve the rigidity of the shaft bearing technology
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( 2 ) is supported by the bearing preload method to improve the rigidity of the ball bearings or tapered roller bearings can take axial preload method , while the short cylindrical roller bearings can take radial preload method can significantly improve the rigidity of the shaft support in this case the bearing clearance or eliminated , or get a little negative clearance . But in speed is not too high, modest temperature conditions , the best should be transferred to the small negative clearance status .
When preload , should continue to measure the deformation , pay attention to the low phase distortion , deformation increases with pretension load is nonlinear ; while at high values ??of phase distortion with increasing load is linear. Once the load deformation a linear relationship appeared , they immediately stop increasing pretension load , constant stiffness available at this time . Thereafter , there is a bearing between the axial and radial rigidity of the rigid fixed relationship does not depend on the applied load.
Deformation of the measurement described above , the indicator can be used e.g. against the head end or the appropriate parts of the bearing shaft, the reading observed with pretension load variation method . Preload method has its negative aspects , such as the bearing friction torque increases, the temperature increased, shortened life expectancy and so on, so to fully consider and weigh the pros and cons , choose the right amount of preload .
(3) the configuration of the bearing bearing bearing rigid configuration is also great , in general, for the centripetal thrust ball bearings and roller bearings used in pairs should be taken when large outer end faces ( ie, the pressure pressure capacity line formed outwardly conical tip ) configuration , configured such that the bearing anti- subversive moment is large, the amount of preload is adjusted too low of a temperature change when the change occurs .
( 4 ) the use of multi- way bearing axial position of permit conditions , each using two or more than two pivot bearings as radial support , can improve the support rigidity. Recently, for example, in parts of the spindle , it is widely used in the axial preload installed several sets of radial thrust bearing as the same pivot shaft support .
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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1 ) requires the installation position of the bearing shaft and the bearing bore on the mating surface , the lower surface roughness , the better the accuracy of shape and position , the higher the rigidity of the support obtained . Above the surface subjected to surface hardening treatment, enabling improved rigidity. The use of low roughness high hardness stopper, to some interference in the lubrication state repeatedly gently pressed into the seat and exit holes , but also help to improve the rigidity of the support , if necessary, is available on the journal clasp similar treatment .( 2 ) is supported by the bearing preload method to improve the rigidity of the ball bearings or tapered roller bearings can take axial preload method , while the short cylindrical roller bearings can take radial preload method can significantly improve the rigidity of the shaft support in this case the bearing clearance or eliminated , or get a little negative clearance . But in speed is not too high, modest temperature conditions , the best should be transferred to the small negative clearance status .
When preload , should continue to measure the deformation , pay attention to the low phase distortion , deformation increases with pretension load is nonlinear ; while at high values ??of phase distortion with increasing load is linear. Once the load deformation a linear relationship appeared , they immediately stop increasing pretension load , constant stiffness available at this time . Thereafter , there is a bearing between the axial and radial rigidity of the rigid fixed relationship does not depend on the applied load.
Deformation of the measurement described above , the indicator can be used e.g. against the head end or the appropriate parts of the bearing shaft, the reading observed with pretension load variation method . Preload method has its negative aspects , such as the bearing friction torque increases, the temperature increased, shortened life expectancy and so on, so to fully consider and weigh the pros and cons , choose the right amount of preload .
(3) the configuration of the bearing bearing bearing rigid configuration is also great , in general, for the centripetal thrust ball bearings and roller bearings used in pairs should be taken when large outer end faces ( ie, the pressure pressure capacity line formed outwardly conical tip ) configuration , configured such that the bearing anti- subversive moment is large, the amount of preload is adjusted too low of a temperature change when the change occurs .
( 4 ) the use of multi- way bearing axial position of permit conditions , each using two or more than two pivot bearings as radial support , can improve the support rigidity. Recently, for example, in parts of the spindle , it is widely used in the axial preload installed several sets of radial thrust bearing as the same pivot shaft support .
