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Cause Analysis of Failure of TIMKEN Spherical Roller Bearings under Eccentric Load

wallpapers Low Carbon 2020-09-24
 (1) If the  TIMKEN spherical roller bearing bears a larger axial load during installation and use, the single-sided raceway will bear a larger load, which can easily cause the bearing to jam, rotate inflexibly and cannot be adjusted center.  TIMKEN bearing failed.
(2) The A-side raceway of the outer ring and inner ring of this  TIMKEN spherical roller bearing peeled off and rolled seriously. The inner ring peeled off from the A-side outer rib in the axial direction, and the rolling surface of the A-side roller was also present Peeling, wear marks, and severe rolling of the cage on this side indicate that the bearing has been subjected to a large axial load during use, resulting in an unbalanced load on the bearing. One side of the raceway has a larger load, while the other side has a smaller load. , The centering cannot be carried out, resulting in fatigue spalling of the raceway on the side of the bearing ring and the working surface of the roller on this side, which will eventually lead to bearing failure.
(3) It can be seen from the axial equidistant fretting corrosion marks on the inner diameter surface of the  TIMKEN bearing inner ring that the bearing vibrates greatly during operation, or the mating surface with the main shaft is not close enough, the contact surface swings backward, slightly Moving forward, the micro-protrusions on the surface are oxidized and abraded, resulting in fretting corrosion.
(4) In addition, the two kinds of perovskite structures of the outer ring of  TIMKEN bearing after quenching and tempering do not meet the standard requirements, indicating that the heat treatment process of the outer ring is improper and the unqualified perovskite structure reduces the service life of the  TIMKEN bearing.
(5) The peeling area was severely crushed, indicating that the  TIMKEN bearing did not stop running after peeling. Continue to run for a while until the bearing temperature rises and the temperature detector sounds an alarm.

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