Поворотные подшипники are core rotating components in construction machinery, lifting equipment, wind turbine generators, and large machine tools, and their performance directly affects equipment safety and production efficiency. Однако, tooth breakage is a frequent problem after long-term use, leading not only to equipment downtime but also potentially high maintenance costs. Так, why do slewing bearings break teeth? And how can this be prevented scientifically? This article will provide a systematic analysis.
Main Causes of Slewing Bearing Tooth Breakage
1. Overload Operation
Slewing bearings are designed with a rated load range. Overloading causes stress concentration on the tooth surface, accelerating material fatigue and ultimately leading to tooth breakage. This is especially true in cranes or large excavators, where improper operation poses a very high risk of overloading.
2. Improper Lubrication
Insufficient lubrication or low-quality lubricating oil leads to direct metal-to-metal contact between the tooth surfaces, повышенное трение, localized temperature increases, and rapid gear wear. Neglecting lubrication maintenance over a long period is a major cause of tooth breakage.
3. Installation and Adjustment Issues
The installation accuracy of the slewing bearing directly affects the gear meshing state. Uneven installation or preload can lead to uneven gear stress and excessive localized stress, easily causing tooth surface damage or even tooth breakage.
4. Material and Heat Treatment Defects
Inadequate strength, твердость, and surface treatment of gear steel can easily cause micro-cracks under high stress environments, eventually leading to tooth breakage due to long-term accumulation. Uneven carburizing or insufficient quenching are also common hidden dangers.
5. Harsh Operating Environment
High temperatures, пыль, and corrosive media can accelerate tooth surface wear or corrosion, reduce load-bearing capacity, and increase the risk of tooth breakage.
Scientific Prevention Measures for Slewing Bearing Tooth Breakage
1. Strict Load Control
Ensure equipment operates within its design load range and avoid frequent overloading. For high-load machinery, slewing bearings with higher rated loads can be selected to increase safety margins.
2. Optimize Lubrication Scheme
Use lubricating grease that meets specifications and regularly check the oil level and quality to ensure adequate lubrication of the tooth surface. For heavy-duty or high-speed operating equipment, consider a circulating lubrication system to improve tooth surface protection.
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