What's the failure analysis and renovation of slewing ring bearings?

Slewing bearings are special types of bearings usually used in heavy machinery.The difference between these types of bearings and ordinary bearings is that  they have high pitch value diameters, the way they are mounted on a structure, generally "static" working properties, high load capacity and a large number  of rolling elements.

The slewing bearing is usually selected according to the static load which is calculated by the axial and radial force and the tilting moment.Some  parameters, such as speed, load and working temperature, are needed to properly select the rotating bearing.There are some assumptions to consider:
1) The bearing is made of high-quality materials without manufacturing defects.
2) Select bearing according to load calculation.
3) The bearing mounting is suitable.
4) The grease quality is good and it can reach every corner of the bearing.
5) The bearing is sealed with high-quality seals.
6) The bearing working temperatureis within the range.
7) Ensure proper maintenance.

What's the slewing bearing performance and characteristics?

Slewing ring bearing is a kind of large bearing which can bear the combined load of large axial load, radial load and overturning moment at the same time.Generally, the swing bearing itself is equipped with mounting holes, lubricating oil and sealing devices, which can meet the different demands of various hosts working under various working conditions.On the other hand, the turntable bearing itself has the compact structure characteristics, easy to guide rotation, simple installation and easy maintenance, which is widely used in large slewing ring such as lifting transport machinery, extractors, construction machinery, port machinery, wind power generation, medical equipment, radar and missile launcher.

Swing ring usually consists of four parts, including inner ring, outer ring, rolling body and isolation block.As the core part adopts slewing bearing, it can bear axial force and radial force at the same time.It has many forms, but its structure is basically the same.