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What problems will affect the service life of the slewing bearing?
Publish time：2021/07/30 News Views：506
The slewing bearing is an important core component of the equipment rotation. If the slewing bearing fails during the operation of the equipment and cannot rotate normally, it will cause the equipment shutdown and production paralysis. Replacing the slewing bearing is generally very troublesome, therefore, everyone generally chooses reliable slewing bearings to install on equipment. After the slewing bearing is installed, everyone hopes that the slewing ring can work stably and reliably, hope the service life as long as possible, so what are the factors that affect the life of the slewing bearing? Let’s analyze them one by one.
1.Equipment’s own problems
The rigidity of the equipment installation foundation is insufficient.
When the slewing bearing is running under heavy load, the insufficient rigidity of the equipment installation foundation cannot support the slewing bearing well, resulting in elastic deformation of the slewing bearing, uneven force during rotation, long-term use will cause damage to the slewing bearing and affect the service life.
The flatness of the installation foundation is not good.
There will be a gap between the slewing bearing and the installation foundation during installation. The correct way is to use a spacer with a suitable height to level the gap, but the operator often ignores this point during installation and use. In this case, the slewing bearing will be deformed after the bolts are compressed, causing the raceway to deform. After the deformation, the raceway and the steel balls are not in contact with each other, resulting in inconsistent clearance values and inflexible rotation, which affects the service life of the slewing bearing.
When the slewing ring is designed, the load capacity has been clarified, such as how much load and tilting moment it can bear. If the actual load exceeds the load capacity of the slewing bearing during use, it is overload operation. When the overload operation is performed, the load carried by the steel ball exceeds the limit load, causing cracks, fatigue spalling, raceway will appear pit, collapse, causing serious damage to the slewing bearing, it is possible that short time overload operation will cause devastating damage to the slewing bearing, seriously affecting the service life of the slewing bearing, overloading operation is easy to cause safety accidents.
Pollution can also cause premature damage to the slewing bearing. Pollution means that dust particles, water, etc. enter bearing raceway, or foreign matters enter the tooth mesh of the slewing bearing. After the contaminants enter, it will wear the raceway and teeth like a grinding wheel, causing damage to the slewing bearing. Pollutants can also cause corrosion of the slewing bearing, cause the grease metamorphism and shorten the slewing bearing life.
The lubrication system can reduce the friction coefficient of the slewing bearing during operation, realize very small rolling friction or sliding friction, prevent the slewing bearing from rusting. If the slewing bearing works lack or without lubrication, It will cause damage to the raceway and teeth of the slewing bearing. Long-term insufficient lubrication is one of the main reasons for premature damage to the slewing bearing.
Through the above analysis, we know the importance of the slewing bearing on the equipment, understand the reasons that affect the slewing life, then we should design a high rigidity installation foundation, installation surface should be flat or leveled during installation; do not overload the equipment operation; regular maintenance of the equipment to ensure that the equipment is clean and timely replacement of seals; Ensure that the lubrication system works normally and the slewing bearing has good lubrication. In this way, our slewing bearing will run smoothly and achieve a satisfactory service life.
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