When the INA bearing is operated under a load condition of 0.1 C, the contact stress between the rolling element and the raceway contact surface increases, resulting in an increase in the working temperature of the bearing, and the performance of the lubricant is relatively deteriorated. Therefore, the limit of the deep groove ball bearing The speed will be reduced accordingly.
For the range of C/=10, since the reduction of the limit rotation speed is small, it can be disregarded, that is, the value is f1=1.
For the radial
bearing subjected to the combined load, the number of rolling elements under load increases, the frictional resistance increases, the heat generation increases, the lubrication and cooling conditions become worse, and the force acting on the cage also increases. According to the bearing type and the load angle, the limit rotation speed of the deep groove ball bearing is multiplied by a reduction factor f2 to adjust.
If the limit speed of the selected INA bearing can not meet the requirements of use, some improved technical measures can be used to improve to meet the satisfactory requirements. Such as increasing the bearing tolerance level; appropriately increasing the clearance; changing the special material and improving the structure of the cage; changing the lubrication method, such as oil and gas, oil mist and jet lubrication; improving the cooling conditions.
First, the test method for bearing lubrication maintenance
During operation, the lubricating oil should be kept open, and the sealing of the seal should be checked regularly to replace the damaged seal. Also monitor the health of the situation and can get from the noise. Lubricant, temperature and other aspects are monitored. Because it should be a smooth humming sound during normal operation, it will be treated promptly when abnormality occurs. The normal lubricant is clear and clean. If the lubricant has become dirty, there will be worn particles or contaminants. When the temperature rises, it will run. An exception will occur.
Second, the specific steps of bearing lubrication maintenance
1, the importance of lubrication
Highly valued INA bearing lubrication technology. Lubrication can use oil film to separate the relatively moving rolling surfaces from each other, without excessive wear due to rough contact, and to ensure stable performance and rotational accuracy during a given working life.
2. Classification of lubrication
It is divided into grease lubrication and oil lubrication. The advantages of grease lubrication are that the lubrication facilities are simple, the grease is not easy to leak, and there is a certain ability of water, gas and other impurities to enter. Therefore, grease lubrication is widely used under normal circumstances. Lubricated with oil under heavy load, high speed, high temperature and other working conditions.
3, the use of grease
The amount of filling should be appropriate. It is best to use one-third and one-half of the space of the filled bearing and the deep groove ball bearing housing. If too much fat is added, the grease deterioration or deterioration will be caused by the stirring and heating. Only fill up to one-third or less at high speeds. When the speed is very low, the housing space can be filled to prevent external physics from entering the INA bearing.
4, the preservation of
bearings
The environment for storage and storage is strict, such as temperature and humidity. To be rust-proof oil before leaving the factory, the room temperature should be controlled at 0-25 ° C, the relative humidity should be maintained at 45% -60%.
