First, way to improve the rigidity of shaft bearing
Increased rigidity of the shaft supporting means, in principle, can be summarized as follows:
(1) Select the high rigidity of the bearing;
(2) application of technology to increase the use of bearings supporting rigid;
(3) the appropriate structural parameters regulating the host, to facilitate increased bearing stiffness.
Second, select the bearing from the bearing rigidity point of view
From the point of view to select the rigid support bearings essentials
(1) roller bearing stiffness than ball bearings high;
(2) large size bearings, the small size of the bearing stiffness than high, even for the same diameter, and width of the larger bearings, smaller than the width of its high rigidity;
(3) grains of rolling bearings and columns rhyme more than the bearing, its rigidity;
(4) of the bearing clearance can be adjusted, i will help improve the bearing stiffness
(5) if necessary, can be used without an inner ring, outer ring or without bearings with inner and outer ring, thereby reducing distortion and increasing part of rolling grains.
Third, improve the rigidity of the shaft supporting application technology
Application of technology to enhance the role of the rigid shaft bearing large, are as follows:
(1) the surface to match the requirements of the bearing shaft and housing bore bearing installed on the site, its lower surface roughness, shape and position accuracy as possible, then get the higher rigidity of the bearing.
Imposed on the surface of the surface hardening treatment is conducive to enhancing rigidity. Use low roughness of high hardness stopper, to a certain degree of interference in a state of much lubrication and gently pressed into the seat out of the hole, but also help to improve the supporting rigidity, if necessary, and a similar ring of the journal processing.
(2) The use of bearing preload method to improve the supporting rigidity of ball bearings or tapered roller bearings can take axial preload method, while the short cylindrical roller bearings can be taken to radial preload method, can significantly improve the rigidity of shaft bearing, this time bearing clearance or eliminating, or get a little negative clearance. But speed is not too high, modest temperature conditions, the best should be transferred to small negative clearance state.



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