Repairing a cojinete de giro is a complex task that should ideally be performed by experienced professionals or the original manufacturer. Sin embargo, understanding the general processes involved can be helpful.Repairing slewing bearings involves a careful and methodical process to restore their performance and extend their service life. Here’s a step-by-step guide on how to repair slewing bearings.
Slewing Bearing Repair
1. Initial Inspection and Assessment:
Visual Inspection: The bearing is thoroughly examined for visible damage such as cracks, abolladuras, corrosión, and seal damage.
Performance Check: Turning torque, noise levels, and any signs of stiffness or uneven rotation are assessed.
Clearance Measurement: The internal clearance of the bearing is measured to determine the extent of wear. A dial indicator is often used to measure tilting or rocking of the connected structures.
Lubricant Analysis: Si es posible, samples of the existing grease are taken and analyzed for the presence of metal particles or other contaminants, which can indicate internal wear.
2. Disassembly and Cleaning:
The slewing bearing is carefully disassembled. This process needs to be done methodically, keeping track of the orientation and position of all components.
All parts (raceways, elementos rodantes, spacers/cages, focas) are cleaned with appropriate solvents to remove old grease, contaminantes, y escombros.
3. Non-Destructive Testing (NDT):
The raceways are typically inspected using methods like magnetic particle inspection or visual testing under magnification to detect surface cracks or defects that may not be visible to the naked eye.
Hardness testing may be performed on the raceways to check for any loss of material hardness.
4. Repairability Assessment:
Based on the inspection and NDT results, a qualified engineer determines if the bearing can be repaired. Factors considered include the severity and location of the damage, the overall wear, and the cost-effectiveness of repair versus replacement.
If the damage is extensive (p.ej., significant cracking, severe wear on raceways), replacement is usually the recommended course of action.
5. Repair Procedures (Depending on the Damage):
Minor Damage (Cracks, Small Dents): Welding and subsequent machining to restore the original dimensions might be possible. This requires specialized expertise and equipment to ensure proper material properties and dimensional accuracy.
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