Double-row slewing bearings are critical components in heavy machinery, diseñado para manejar axial significativo, radial, y cargas de momento mientras permite el movimiento de rotación. Debido a los entornos exigentes en los que operan, son susceptibles a varias fallas. Comprender estos problemas comunes y sus soluciones es crucial para mantener el rendimiento del equipo y la longevidad.
Common Faults of Double-Row Slewing Bearings
Abnormal Noise (Clicking, Grinding, Squealing, or Rattling):
Causas:
Insufficient or Improper Lubrication: Lack of grease, deteriorated grease, or using the wrong type of lubricant.
Foreign Objects in Raceway: Polvo, suciedad, partículas metálicas, or other debris entering the bearing.
Severe Raceway or Rolling Element Wear: Pitting, Según la influencia del material del cojinete., or other damage due to fatigue, corrosión, o contaminación.
Loose Mounting Bolts: Allowing movement between the bearing and its mounting surface.
Poor Meshing of Gears: Improper clearance between the slewing bearing’s gear and the pinion, or damaged/broken teeth.
Bearing Overload: Exceeding the bearing’s design load capacity.
Internal Faults: Such as a damaged cage, inner/outer ring, or balls.
Symptoms: Loud, unusual sounds during rotation, especially under load.
Lack of Flexibility in Rotation (Stiffness, Slow Movement, or Jamming):
Causas:
Lubricación insuficiente: Grease becoming viscous, especially in cold weather, or simply not enough lubrication.
Foreign Objects in Raceway: Blocking the rolling elements.
Overload Operation: Causing damage to the raceway.
Instalación incorrecta: Uneven mounting surface, resulting in uneven force distribution or the bearing being in a negative clearance state.
Damaged Sealing Strips: Allowing foreign objects or moisture to enter.
Bearing Deformation: Due to excessive load or manufacturing defects.
Excessive Clearance: Leading to “movimiento salvaje” or looseness.
Symptoms: Difficulty in rotating the slewing platform, jerky movement, or complete inability to rotate.
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