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Contact fatigue spalling occurs on the working surface of INA Bearing, which is often accompanied by fatigue cracks. It first occurs from the large Ina Thrust Self-Aligning Roller Bearing alternating shear stress below the contact surface, and then extends to the surface to form different spalling shapes,
such as pitting or pitting spalling, which is called shallow spalling. Due to the gradual expansion of the spalling surface, it often Ina Thrust Self-Aligning Roller Bearing expands to the deep layer, forming deep spalling. Deep spalling is the fatigue source of contact fatigue failure.
Continuous wear will cause gradual damage to thrust self-aligning roller bearing parts, and eventually lead to the loss of dimensional accuracy of INA Bearing and other related problems. Wear may affect the change of shape,
the increase of fit clearance and the change of working surface morphology, may affect the lubricant or make it polluted to a certain extent, resulting in the complete loss of lubrication Ina Thrust Self-Aligning Roller Bearing function, so that the bearing loses the rotation accuracy and even cannot operate normally.
Wear failure is one of the common failure modes of various bearings. According to the wear form, it can be divided into common abrasive wear and adhesive wear.
Oil lubrication methods include:
1. Drip lubrication
Oil dripping lubrication is suitable for thrust self-aligning roller Ina Thrust Self-Aligning Roller Bearing bearing components requiring quantitative supply of lubricating oil. The oil dripping amount is generally one drop every 3-8 seconds. Excessive oil will cause the temperature of INA Bearing to increase.
2 circulating oil lubrication
The filtered oil is delivered to the bearing parts by the oil pump, and the lubricating oil after passing through the bearing is filtered and cooled before use. Since the circulating oil can take away a certain amount of heat to cool the INA Bearing, this method is applicable to the bearing components with high speed.
Oil bath lubrication is a common lubrication method, which is suitable for the lubrication of low and medium speed bearings. Part of the thrust self-aligning roller Ina Thrust Self-Aligning Roller Bearing bearing is immersed in the groove,
and the lubricating oil is brought up by the rotating bearing parts and then flows back to the oil groove. The oil surface should be slightly lower than the center of the low rolling element.
4. Spray lubrication
Use the oil pump to inject the high-pressure oil into the bearing through the nozzle, and the oil injected into the INA Bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling element and cage also form airflow in the surrounding air at a fairly high rotation speed.
It is difficult to send the lubricating oil to the bearing by general lubrication methods. At this time, the lubricating oil must be sprayed into the thrust self-aligning roller bearing by high-pressure injection. The position of the nozzle should be placed between the inner ring and the center of the cage.
5. spray lubrication
The dry compressed air is mixed with the lubricating oil through the sprayer to form an oil mist. In the jet thrust roller bearing, the airflow can effectively cool the INA Ina Thrust Self-Aligning Roller Bearing bearing and prevent impurities from invading. This method is suitable for the lubrication of high-speed and high-temperature bearing parts.
1. In the process of using NTN bearings, regular cleaning is very important. How to accurately clean the bearing? When the bearing is removed for inspection, the appearance record shall be made by means of photography. In addition, confirm the amount of remaining lubricant and sample the lubricant before cleaning the bearing.
2. The cleaning of bearings can be divided into rough cleaning and fine cleaning, and a metal grid can be placed at the bottom of the container.
3. During rough washing, use a brush on the oil top to remove Ina Thrust Self-Aligning Roller Bearing grease or adhesion. At this time, if the bearing is transferred in the oil, the rolling surface will be damaged by foreign matters.
4. During fine cleaning, the bearing shall be slowly moved and changed in the oil and shall be stopped with great efforts.
5. The cleaning agent used on weekdays is neutral water-free diesel oil or oil, and warm lye is sometimes used according to the demand. No matter what kind of cleaning agent you use, you Ina Thrust Self-Aligning Roller Bearing should always filter and keep clean.
6. After cleaning, apply antirust oil or antirust grease on NTN bearing immediately.
In order to make the imported bearings serve the mechanical operation for a longer time, it is necessary to conduct regular inspection on NTN bearings.
Through the inspection, the Ina Thrust Self-Aligning Roller Bearing problems caused by mechanical operation can be effectively found, the problems can be well solved, and the service life of the bearings can be effectively increased.
During the inspection, mainly observe whether the rivet head of the bearing is skewed, loose and whether the welding position is correct. The welding of cage is good or bad. Whether the welding point is too small, the welding is not firm,
or the ball clamping caused by excessive welding. They are all places that need special attention in the process of testing imported bearings. There are also some problems that need attention.
Local inspection of bearing. First of all, in terms of environment, the inspection of imported bearings should be carried out in the environment with light, which is astigmatism, so as to better observe the outside of the bearing and see that there are no cracks and other abnormalities on its surface.
For example, the wear, scratch and collision in the process of mechanical cloud will lead to the deviation of the bearing device, poor position of the device, flat load and stress concentration, and the reduction of the accuracy and service life of the modeling bearing.
In addition, the working environment also pays special attention to moisture or pollutants, which are easy to lead to bearing rust. Rust leads to poor installation and early wear of NTN bearings, and more seriously, it will lead to direct scrapping of bearings. Therefore, pay special attention to waterproof and moisture-proof in the process of use.