Several manifestations of damage of self aligning roller bearings

For the injury situation of self aligning roller bearings, for example: the jam of the ring rib of the self aligning roller bearings can be considered as the cause, insufficient lubricant, unsuitability, shortcomings of the oil supply and drainage structure, foreign matter intrusion, bearing device error, shaft If the deflection is too large, these causes will overlap.

1. Cavitation
The cavitation of self aligning roller bearings is a nominal injury situation produced when a solid body is in contact with a liquid and does absolute activity. Self aligning roller bearings are assembled with drum-shaped roller bearings between the inner ring with two raceways and the outer ring with spherical raceways. Self aligning roller bearings have two rows of rollers, which mainly bear radial load, but can also bear axial load in any direction. With high radial load capacity, it is especially suitable for working under heavy load or vibration load, but it cannot bear pure axial load. The outer ring raceway of this type of self aligning roller bearings is spherical, so its alignment performance is good, and it can compensate the coaxiality error. When the lubricating oil is in the low-pressure area of ​​the oil film, bubbles will form in the oil. After the bubbles move to the high-pressure area, the bubbles collapse under the action of pressure. At the moment of collapse, a great impact force and high temperature are generated. The solid name is here. Under the repeated action of the impact force, the material fatigued and fell off, causing the friction to appear as small pits, which then developed into a sponge-like wound. In heavy-duty, high-speed sliding bearings with large changes in load and speed, cavitation often occurs;

2. Fluid erosion
The fluid erosion of self aligning roller bearings refers to the fluid erosion caused by the fluid violently impacting the solid surface, causing the solid surface to appear point-like scars, and the damage surface is more lubricated;

3. Electric erosion
The electric erosion of self aligning roller bearings refers to the electric spark generated between the friction of the bearing due to the electric leakage of the motor or the electrical appliance, and the friction is nominally caused the point-like scars, which is characterized by the damage to the original harder journal.

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