Life Cycle Damage Analysis of IKO Joint Bearings

When the joint bearing is removed and inspected after the damage, the failure of the IKO bearing and the cause of the damage can be judged according to the damage of the bearing.
1. Rolling surface metal peeling
The bearing rolling elements and the inner and outer ring raceways are subjected to periodic pulsating loads, resulting in cyclically varying contact stresses. When the number of stress cycles reaches a certain value, fatigue peeling occurs on the rolling element or the inner and outer ring raceways. If the load on the IKO bearing is too large, this fatigue will be exacerbated. In addition, the bearing is not installed correctly, the shaft is bent, and the raceway is peeled off. Fatigue spalling of the bearing races reduces the accuracy of the shaft and causes vibration and noise in the mechanism.
2. Bearing burns
Burned bearings have a tempering color on the raceways and rolling elements. The causes of burns are generally insufficient lubrication, the quality of the lubricant does not meet the requirements or deterioration, and the bearing assembly is too tight.
3. Plastic deformation
Uneven pits appear on the contact surface between the raceway and the roller of the bearing, indicating that the bearing is plastically deformed. The reason for this is that under a large static load or impact load, the local stress of the working surface exceeds the yield limit of the material, which generally occurs on bearings rotating at low speed.
4. Bearing race crack
The cause of the crack in the bearing race may be that the bearing is too tight, the outer ring or the inner ring is loose, the bearing of the bearing is deformed, and the surface of the bearing is poorly machined.
5. The cage is broken
The reason is insufficient lubrication, broken rolling elements, and skewed races.
6. The metal of the cage adheres to the rolling elements
The possible cause is that the rolling elements are stuck in the cage or are insufficiently lubricated.
7. The raceway of the raceway is seriously worn
It may be that foreign objects are falling into the seat, the lubricating oil is insufficient or the lubricating oil grade is not suitable.
The main factors affecting the damage of the joint bearing are: load condition, lubrication condition, assembly condition, environmental condition and material or manufacturing precision.
After the joint bearing is installed, if it is not carefully aligned, alignment may result in additional load, friction and vibration of the bearing. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.
During use, the basic external conditions of the joint bearing operation are often monitored, such as temperature, vibration and noise measurements. These regular inspections will identify potential problems early and will prevent unexpected machine stops, enabling production plans, increased plant productivity and efficiency.
During operation, the bearing is required to have the correct relubrication to perfect its performance. The method of bearing lubrication is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing.
When the bearing will reach its end of life, it should be replaced. Although the bearing can no longer be used, correctly removing the original bearing and replacing the new joint bearing in time can promote the service life of the new bearing. First, the use of a suitable removal tool will help prevent damage to other machine components. Second, improperly removed technology can be hazardous to the operator.

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IKO tapered roller bearing vibration maintenance detection method

Maintaining the bearing is a necessary condition for the operation of the tapered roller bearing. The common maintenance is to lubricate the IKO bearing. When reading how to select the lubrication method of the bearing, under the premise of understanding the lubrication mode of the bearing, it is also known to the maintenance of the bearing system. It is necessary to let us see how to carry out bearing lubrication maintenance.
1. Keep the bearing lubricated clean
Before inspecting the tapered roller bearing, the surface of the bearing should be cleaned first, and then the oil seal of the bearing and its surrounding parts should be carefully inspected. If there are any bad symptoms, be sure to replace it. The bad oil seal will cause damage, making IKO The bearing cloud is not normal and the equipment is shut down.
2. Pay attention to cover exposed bearings
When inspecting tapered roller bearings, do not expose the bearings to contaminants or moisture. If the work is interrupted, the machine should be covered with a piece of oil-paper plastic or similar material. If the unshielded bearing is cleaned without performing disassembly and may be inspected, use a brush for application to clean with a petroleum solvent, then dry it with a lint-free cloth or blow it with compressed air (be careful not to let The bearing assembly starts to rotate). Check the track surface, retainers and beads of the IKO bearing with a small mirror and a probe similar to that used by dentists. Do not clean the bearing with a sealing cover or dustproof; just wipe the outer surface. If the bearing is damaged, it needs to be replaced. Replacing bearings during regular downtime maintenance is far more economical than the loss of sudden downtime selected due to damage to the array.
3. Check the lubricant of the bearing
Lubricants are important not only for bearings but also for all bearings. However, please note that it is not advisable to add too much grease to tapered roller bearings. Then it is to replace the lubricant of the bearing. Bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect the contaminants from the wreckage and then vent the oil. For grease-lubricated IKO bearings, when replacing grease, the cutter used should avoid any contact with the cotton material in any part of the bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, in particular the application of the bearing needs to pay attention to this problem.
When the waviness of the component is closely matched between the bearing ring and the bearing housing or the transmission shaft, the bearing ring may be deformed in cooperation with the shape of the adjacent component. If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the housing and drive shaft to the required tolerances.
Local damage A small number of bearing raceways and rolling elements may be damaged due to handling or installation errors. In operation, rolling a damaged bearing component produces a specific vibration frequency. Vibration frequency analysis identifies damaged bearing components. Vibration Behavior in Applications In many applications, the stiffness of an IKO bearing is the same as the stiffness of the surrounding structure. Due to this feature, it is possible to reduce the vibration in the application as long as the bearings (including preload and clearance) are properly selected and their configuration in the application.

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