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How could we increase the slewing bearing service life?
Publish time：2021/07/31 News Views：246
A well-designed slewing bearing can greatly increase the service life of the slewing bearing as long as it is properly operated and used, whether it is installation, use or later maintenance.
1.Installation of slewing bearing
Regarding the slewing bearing installation, first the step must be placed in right location, the mounting holes must be aligned, the bolts must be pre-tightened when installing, then tighten the bolts according to the diagonal method according to the tightening torque of different bolts. In fact, there are two main points to pay attention to for the slewing bearing installation. The first is the installation platform, the second is the installation method.
The installation platform of the slewing bearing
The installation platform of the slewing bearing must firstly have sufficient strength support, secondly, it must have sufficient flatness. Many people have no problem with the support strength, often ignore the installation surface flatness. The slewing bearings produced by Unique Transmission generally have high accuracy and require high flatness of the mounting surface. If the flatness of the installation surface is greater than the parallelism of the slewing bearing, when the bolts are tightened, the slewing bearing’s precision will be lost, the slewing bearing will be deformed and the raceway will be misaligned, which will reduce the slewing bearing life. The installation platform of the slewing bearing is generally machined.
Installation method of slewing bearing
When installing the slewing bearing, it’s necessary to check the flatness. For defective locations, you can use the method of adding shims, the fitting surface of the slewing bearing and the installation platform should be clean and free of particles and other debris.
The slewing bearing has the position of the soft area when it leaves the factory, generally marked as S, and the plug is always the position of the soft area, special attention should be paid to the soft area position when installing the slewing bearing. The position of the soft area should be adjusted to the non-loaded area or the area that is not frequently loaded. The soft area of the inner ring and outer ring of the slewing bearing should be staggered into 180°. When installing slewing bearings for some lifting equipment such as truck cranes, lifting cranes and tower cranes, the soft area should be installed at 90° with the lifting arm.
The geared slewing bearing is generally sprayed with colored paint at the highest position of the tooth runout. This position is used to fit the pinion and adjust it with a feeler gauge according to national standard requirements.
2.Use and maintenance of slewing ring
In the use of the slewing bearing, it’s necessary to refer to the installation manual and maintenance manual issued by the manufacturer for guidance. Seals, rolling elements and grease should be replaced in time according to different working conditions.
The slewing bearing is filled with 70% grease in the raceway when it leaves the factory, which can be used by the user for a period of time. When refilling the grease, pay attention to the remaining grease should be cleaned up, fill grease brand and model recommended by the manufacturer, Note that grease must not be mixed, it is best to use grease of the same brand and model.
For geared slewing bearings, the grease in the tooth parts should be replaced and cleaned in time to ensure that the tooth surface is clean and free of particles and other debris, so as to avoid damage to the tooth surface when the teeth mesh for a long time. The slewing ring needs to be disassembled and assembled when replacing the slewing bearing rolling elements, cages, and seals, when placing the slewing bearing, it must be lifted and stored horizontally, vertical lifting and storage are prohibited. In use, pay attention to the operation of the slewing bearing. If noise, impact, shaking are found, stop the operation in time, remove the failures and contact the manufacturer to provide technical support if necessary.
The slewing bearing installation is very important, the correct installation method can greatly increase the slewing bearing life and make the later maintenance more convenient and labor-saving. Regular maintenance the slewing bearing, replacement of wearing parts, good protection of the raceway and good protection of the tooth surface can also effectively extend the slewing bearing life.
The engineers of Unique Transmission Equipment (Luoyang) Co., Ltd. have rich experience in the design and selection, production and processing, after-sales service of slewing bearings, can provide a full range of services from design to installation, welcome to consult.
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