Introduction to self-aligning performance and rigidity of bearings
When the center line and the bearing center line, angle error, or because the two rigid bearing spacing is larger and the shaft with a small, easily bent by force or tilt, can be used with good aligning performance of self-aligning ball or roller bearings, and ball bearing. This kind of bearing can work normally when the shaft is slightly inclined or bent. The performance of the self-aligning bearing is related to its allowable different axes, and the greater the value of different axial values, the better the heart adjustment performance. As you know, various bearings allow different axes to vary.
The rigidity of a bearing refers to the magnitude of the unit deformation required by the bearing. Rolling bearing elastic deformation is small, in most machines do not have to consider, but in some machinery, such as machine tool spindle, bearing rigidity is an important factor, should generally be used for cylinder and taper roller bearings. Because these two kinds of bearing bear load, its rolling body and raceway belong to point contact, the rigidity is poorer.
In addition, all kinds of bearings can be tightened to achieve the purpose of increasing the rigidity of bearings. Such as angular contact ball bearings and tapered roller bearings, in order to prevent vibration of the shaft, increase the support rigidity, often in the installation of a certain axial force in advance, so that they are mutually pressing. It is specially pointed out that the amount of pretension should not be too large. Too large, will increase the friction of bearings, temperature rise, affecting the bearing life. |
