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Analysis of the application of heavy-duty bearings
Source: Bearing network time: 2014-05-01
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The application of heavy-duty bearings; it is necessary to consider the characteristics of heavy-duty bearings. Heavy-duty bearing operations are often under high stress conditions; and bearings are sensitive to high stresses; therefore, all aspects of the application of technology must be slowed down. The stress of the bearing; and the slowing of the stress is very beneficial to the life of the extended bearing. For example, the high-load machine under the condition of axial orientation; the single bearing of a certain fulcrum is multiplied to two to accept the radial load; Despite the effects of uneven load; under the same workpiece conditions; the life of the two bearings of the fulcrum is different than the original single bearing; it is expected to progress far more than twice. In fact; in heavy machines, it is often A fulcrum uses multiple bearings or multiple rows of bearings to accept radial loads.
1. The cooperation of heavy-duty bearings, the cooperation of clearance and smooth heavy-duty bearings, clearance and smoothness are necessary to think in unison.
In order to alleviate the stress of heavy-duty bearings; it is expected that the smooth film layer is thicker; therefore, it is preferred to use a smooth oil with a higher viscosity or a smooth grease with a higher viscosity oil as a base oil; together, it is expected to ensure excellent smoothness; Because the frictional viscosity of the smoothing agent is not too high.
The cooperative interference of the heavy-duty bearing rotating ferrule is larger than the general condition; and this has a effect on the raceway deformation so that the bearing life has a suffocating effect; thus, under the condition of being able to; the expected interference is appropriately reduced; Appearance roughness; together with smooth and normal; because smooth if it fails; excessively large conflicting moments on the underside of the heavy-duty raceway enhance the trend of cooperative external activities; even the appearance of slipping; although these appearances are more in the outer circle; The circle is also inevitable. The cooperation of the outer circle practice should not present excessive voids; avoid the entry of grease into the appearance; promote the occurrence of slipping appearance; and make the ferrule easy to deform; reduce the bearing area of ​​the bearing.
As long as the useful countermeasures are carefully adopted, it is agreed to appropriately reduce the cooperation and over-profit of heavy-duty bearings; while the interference is slightly reduced; the improvement of the bearing stress condition is greater; of course; the advantage of thickening the oil film is even greater.
Because of the large bearing area under the heavy load, the contact area is large; the cooperation is tight; the ferrule is close to the amount and the deformation is large; therefore, the clearance of the general bearing is also larger.
2. Improve the bearing operating conditions from the host. All the drive shafts in the drive chain should be properly driven at higher speeds; until the drive to the spindle, then reduce to the operating speed; and the components of the spindle bearings should be larger; Large bearings; these are good for bearings.
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