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Analysis of the appearance of KOYO imported bearings fatigue damage
Source: China Bearing Network Time: 2018-01-25
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2), fatigue is the result of the periodic presentation of the shear stress under the load surface; after a period of time; these shear stresses cause a slender cranium; then gradually extend to the appearance; when the rolling member passes through these split skulls; The crack falls; it constitutes the so-called "peeling appearance"; then the condition of peeling continues to expand; the bearing is damaged.
3), the above is a depiction of KOYO's imported bearings; it begins to attack below the surface; although the initial stripping condition is generally very slender; but with the addition of stress and the increase of cracks; the extension of the stripping area; The situation generally lasts for a long time; its noticeable period is when noise and sensation are added.
4), the bicycle bearing in the primary period of damage; can only be difficult to feel when changing; and later found that there is a pockmark in the transformation; and a quantity of pockmark; bearing is not incapable; only in each time the beads Both the shaft bowl and the shaft file have more wear and more serious damage; because the bicycle is a low-speed high-pressure type bearing method; therefore, even if the appearance of peeling is severe, it is not overwhelming; It takes your motivation; and your feelings can only be that the car doesn’t know why it’s not good enough.
5), therefore before the KOYO imported bearings are completely damaged; it provides the discovery moment that the user satisfies; do not ignore the existence of such conflicts; it will reduce the speed of riding; let the long-distance force cost more and slower.
If the roughness of the appearance is slender; if the smooth oil film has the proper thickness; then the probability of external stress generation is suitably low; this is why it is appropriate to properly select the appropriate oil for smoothing; however; if the pressure load exceeds The pu value of the oil film (the fatigue load limit value; such as excessive speed; excessive pressure impact); then the fatigue of the data will come sooner or later.
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