slewing bearingIt is a kind of large bearing that can bear comprehensive load, and can bear large axial and radial load and overturning moment at the same time. Slewing bearings are usually provided with mounting holes, internal or external gears, lubricating oil holes and sealing devices, so that the design of the host is compact, simple to guide, and easy to maintain.　　slewing bearingThere are four series: four-point contact ball bearings without teeth, external teeth and internal teeth, double row angular contact ball bearings, cross cylinder(Tapered) roller bearings and three-row cylindrical roller composite bearings, of which four-point contact ball bearings have a high static load capacity, crossed cylindrical roller bearings have a high dynamic load capacity, and the pre-interference of crossed tapered roller bearings can make the bearings have high support stiffness and rotation accuracy. Three rows of cylindrical roller combination bearings due to the improvement of the carrying capacity of the bearing height is reduced, and various forces are borne by different raceways. Therefore, under the same force, the bearing diameter can be greatly reduced, making the host more compact. is a kind of high carrying capacityslewing bearing.slewing bearingWidely used in lifting machinery, mining machinery, engineering machinery, port machinery, marine machinery, high-precision radar machinery, missile launchers and other equipment in large rotary device. At the same time, we can also design, develop and produce various special structures according to the specific requirements of users.slewing bearing.

　　slewing bearingThe general diameter0.4~10 meters, with mounting holes, internal gears or external gears, lubricating oil holes and sealing devices. It has the characteristics of compact structure, accurate and stable transmission, flexible rotation, long service life, simple installation, and convenient daily use and maintenance. For different application requirements, slewing bearings have a variety of structural forms to adapt to it, and can meet the functional requirements of different manufacturing accuracy levels of the host, so it can be widely used in lifting machinery, construction machinery, metallurgical machinery, medical machinery, transportation machinery, food machinery, textile machinery, material processing machinery, military equipment, aerospace equipment, power generation equipment and other fields, is an indispensable mechanical part of the rotary device.

During the use of slewing bearings, due to their own quality and external conditions, their carrying capacity, rotation accuracy and anti-friction performance will change. When the performance index of the bearing is lower than the use requirement and cannot work, it is called bearing damage or failure. Once the turntable bearing damage and other unexpected situations occur, there will be machine equipment stall, functional damage and other abnormal phenomena.

Therefore, in a short time, investigate the cause and take corresponding measures.slewing bearingThe damage is much more complicated than the damage of general mechanical parts. The damage forms of slewing bearings are various and the causes are complex. In addition to the internal factors of bearing design and manufacturing, the damage of the bearing is partly caused by external factors such as improper use, unreasonable support design, improper installation, poor lubrication, and poor sealing.