Slewing ring （2500LB S235JR Nipolet Flange）is also called "slewing ring" because its shape is similar to a plate. Its diameter is usually 0.2 ~ 10m. It is a large bearing that can bear axial and radial load and overturning moment. The slewing bearing is composed of mounting hole, inner gear ring or outer gear ring, isolation block, cage, lubricating oil hole and sealing device. Therefore, it can make the design structure of the host compact, easy to guide and easy to maintain.
1、 Slewing bearing structure
The rolling elements of slewing ring（2500LB S235JR Nipolet Flange） are usually separated by nylon isolation blocks. This structure can maintain the stability of movement and is cheap, so it is widely used. Special ball or roller isolation blocks are required for special applications, such as copper, aluminum and other high-temperature resistant isolation blocks. For the bearings usually installed on the horizontal shaft or the slewing bearing used in the continuous rotating generator and the occasions with high requirements for positioning and reliability, the strip combined cage can be used to make the rolling element in the correct circumferential position and higher reliability.
2、 Causes and solutions of heating caused by structural factors of slewing ring（2500LB S235JR Nipolet Flange）
Cause: the size of the shaft of the slewing ring（2500LB S235JR Nipolet Flange） is too large, so the bearing will be tight. Solution: provide appropriate tolerance for the shaft, and it is strictly prohibited to be too tight.
Reason 2: the aluminum three-layer annular seal ring is heated due to friction. Solution: apply grease when installing the seal hole and ring to reduce friction resistance.
Reason 3: the slewing bearing seat is coated with too much grease or the oil level is too high. Solution: the slewing bearing will remove the excess grease through the sealing hole, and the oil will be lubricated to reduce the oil level just below the bearing housing.
Reason 4: the friction between the inner ring and the sealing ring generates heat. Solution: stop the machine and check the clamping ring screws to ensure that the inner ring is firmly attached to the shaft, that the free bearing is installed correctly, and that the roller is aligned with the center line of the outer ring.
In addition to the slewing ring structure, there are other reasons that can cause heating, as follows:
Cause 5: lubricant failure caused by improper type of lubricating grease or oil. Solution: re select the appropriate type of lubricating oil.
Reason 6: the oil level is low and the grease is insufficient. Solution: the oil level outside the shaft diameter should be just lower than the cage, and add appropriate grease.
Of course, there may be many reasons for the overheating of the slewing ring. In order to ensure the normal use of the slewing ring, I hope you can stop the machine for inspection in time when you encounter the overheating of the slewing ring, find out the reasons and deal with them, so as to prevent the shortening of the service life of the slewing ring（2500LB S235JR Nipolet Flange）.
3、 Working principle of slewing ring（2500LB S235JR Nipolet Flange）
The working principle of slewing ring（2500LB S235JR Nipolet Flange） is very simple: the way of moving objects is sliding to rolling to reduce friction resistance.
Specifically, the slewing ring mainly relies on lubrication and friction to achieve the results of operation. Internally, it relies on the mutual friction between the ball and the steel ring（2500LB S235JR Nipolet Flange） to achieve the purpose of operation. Externally, it also relies on the friction between the slewing bearing and other parts to start the operation and rub with each other, so as to drive the operation of the object. Because it is mostly used to carry heavy large objects, it has high requirements for centripetal force, which is also determined by its working principle. Therefore, it also needs steel materials that can ensure quality in terms of materials.
Of course, friction alone is not enough. Although it depends on friction to operate, lubrication is also essential. Just like the chain of a bicycle, if it is used for a long time and the friction is too large, it will also affect the use of parts. Therefore, after using this kind of bearing for a period of time, it is necessary to maintain it in time and brush some lubricating oil to ensure that it can work in a relatively suitable environment.
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