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Analysis of the primary damage method of tumbling imported bearings
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The main damage methods for tumbling imported bearings are as follows:
.1) fatigue falling off in tumbling imported bearings; touch appearance and relative movement of the touch surface (raceway or tumbling external surface); because of repeated acceptance of the load; first under the surface; at a certain depth; some weaker ones constitute a crack Then proceed to touch the appearance; make the surface metal fall off in a sheet; the imported bearing can not work properly; this appearance is called fatigue shedding. The end of the rolling bearing is exhausted and unavoidable; in fact, the device is smooth and the seal is normal. In the case; the damage of most imported bearings is fatigue damage. Therefore, the so-called imported bearing life; refers to the fatigue life of the bearing.
.2) Plastic deformation (Eternal deformation)
After the roller bearing receives the load; plastic deformation occurs at the roll body and the track touch. When the load is too heavy; the plastic deformation pit will be formed on the outer surface of the raceway; and the imported bearing will have a strong oscillation and noise during operation.
The external hard particles enter the imported bearing; they can also form an indentation on the touch surface. In addition; excessive impact load; or when the bearing stops; because the machine oscillation and other factors will make the touch form a pit. Can limit the support in the bearing The eternal deformation amount determines the static bearing capacity of the bearing.
.3) wear due to the relative movement of the rolling body and the raceway and the intrusion of dirt and dust; the wear of the rolling body and the raceway is worn out; when the amount of wear is large; the bearing clearance, noise, and oscillation are increased; The accuracy of the work; thus directly affects the accuracy of some of the mainframes. Therefore, for some imported bearings for precision machinery; the amount of wear can be used to limit the life of the bearing.
The above three types of damage are common primary damage methods. There are many other types of damage; such as ferrule cracking, roll crushing, cage wear and cracking, current through electrical erosion, corrosion, etc. The presentation is contingent; it is related to many elements. In the case of equipment, smooth, and normal protection; damage in these ways can be avoided.
To avoid the three primary damage modes of the rolling bearing, the following methods can be used: the fatigue damage can be carried by the additional dynamic load limiting period, and the plastic deformation can be limited by the additional static load. The wear can be determined by limiting the amount of wear.
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