A way to improve the rigidity of the shaft support
 
   To improve the rigidity of the shaft support, in principle, can be summarized as follows:
 
   (1) Select the highly rigid bearings SKF Agricultural Bearings optional;
 
   (2) Bearing application technology by supporting rigidity;
 
   (3) Appropriate to adjust the parameters of the host structure, in order to facilitate the improvement of the supporting rigidity.
 
, Select from the supporting rigidity perspective bearing
 
   To select from the point of view of supporting rigidity of the bearing essentials
 
   (1) Roller bearings higher rigidity than a ball bearing;
 
   (2) Large size bearings, imported bearing a wide range of applications in the automotive, its rigidity is smaller than the size of the bearing high, even if it is the same diameter, while the width of the larger bearing, its rigidity is smaller than the width of the body;
 
   (3) Rolling grains rhyme bearings and columns bearing rigid;
 
   (4) Adjustable bearing clearance is conducive to improve support rigidity
 
   (5) Where necessary, can be used without an inner ring, outer ring without or without the inner and outer rings of the bearing, thus reducing deformation segment and increase the grains of the rolling body.
 
Third, to improve the rigidity of the shaft supporting the application technology
 
   Application of technology to improve the shaft supporting a rigid role, as described below:
 
   (1) on the surface of the bearing Matches require low noise NSK bearing installation and adjustment shaft and a bearing housing bore mounting portion, the surface roughness lower the score, the better the precision of shape and position, the supporting rigidity is also higher.
 
   Subjected to surface hardening treatment, the surface is conducive to enhancing rigidity. Very low roughness, high hardness stopper interference in the lubrication state repeatedly gently pressed into and exit bore, and also help to improve the supporting rigidity can be used, if necessary, snap ring journal similar .
 
   (2) bearing preload method to improve the supporting rigidity of ball bearings or tapered roller bearings can take axial preload, and short cylindrical roller bearings can be taken to the radial preload method can significantly improve the shaft support rigidity , or eliminate the bearing clearance, or get a little negative clearance. However, under the conditions of rotational speed is not too high, the temperature rise is not, and should preferably be adjusted to a small negative clearance state.
 
    Preload should continue to measure the deformation, pay attention in the low stage of deformation, deformation is non-linear with increasing preload load; in the high-value stage deformation with increasing load is linear up.
 
   Once the deformation load linear relationship, immediately stop increasing the preload load, has constant stiffness can be obtained at this time.
 
   Thereafter, a fixed relationship exists between the axial stiffness and radial stiffness of the bearing, without depending on the applied load.
 
   The amount of deformation of the measurement can be used to, for example, the indicator head against the appropriate parts of the end face of the bearing or shaft, to observe the changes in the method of the readings with the pretension load.
 
   Preload method has its negative aspects, such as the bearing friction torque increases TB aircraft landing gear wheels SKF bearing failure analysis and maintenance of the temperature rise improve, shortened life expectancy and so on, so to take full account of trade-offs, select the appropriate the amount of preload.
 
   (3) the configuration of the bearing configuration bearing stiffness, generally, for the radial thrust ball bearings and roller bearings, take the outer ring facing (ie, the pressure should be used in pairs the pressure cone tip line outward) configuration, this configuration bearing anti-subversive moment, when the temperature changes its tone was less change in the amount of preload.
 
   (4) Under the conditions of using the multi bearing support in the axial position allows each fulcrum uses a two or more than two of the bearing as a radial bearing, the supporting rigidity can be improved. For example, recently in the machine spindle assembly, widely used to axial preload installed as the same fulcrum of the several sets of radial thrust bearing shaft support.
 
 



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