Internal lubrication technology to solve bearing heating
Internal lubrication technology to solve bearing heating
2022年3月23日
Reduce the influence of vibration and temperature on NTN needle roller bearing through rational use of lubricating grease
Reduce the influence of vibration and temperature on NTN needle roller bearing through rational use of lubricating grease
2022年3月23日

Causes of damage of Timken thrust needle roller bearing and its maintenance skills

  • Before the thrust needle roller bearing is completely destroyed, it provides users with enough discovery time. Don’t ignore the existence of this friction. It will reduce the speed of riding, increase the consumption of physical strength over a long distance and slow down the speed. 
  • If the roughness of the surface is slight and the lubricating oil film has an appropriate thickness, the probability of surface stress generation is quite low, which is why it is necessary to properly select the appropriate engine oil for lubrication. 
  • However, if the pressure load exceeds the Pu value of the oil film (fatigue load limit value, such as too high speed and too high pressure impact), the fatigue of the material will come sooner or later.Causes of damage of Timken thrust needle roller bearing and its maintenance skills
  • In order to make Timken bearing clamp the axis and prevent shaft sleeve friction (this phenomenon will produce high temperature in a moment on the high-speed rotating machinery, causing the lubricating oil to burn dry and even lead to heat rise and jamming, resulting in shutdown), the inner bell and outer bowl (also known as bearing box in industry) of the bearing use a kind of “interference” phenomenon. Generally speaking, the shaft is larger than the inner bell, or the outer bowl is larger than the load,。
  • This interference requires a lot of force to install, and such installation requires a lot of force to knock Peilin, which will cause damage to Peilin in the process of knocking. Therefore, large Timken bearings in industry usually adopt heating, hydraulic jacking and other methods.Causes of damage of Timken thrust needle roller bearing and its maintenance skills

 

Causes of damage of Timken thrust needle roller bearing and its maintenance skills

Causes of damage of Timken thrust needle roller bearing and its maintenance skills

  • (1) The difficulty of forming alloy in metallurgy.Causes of damage of Timken thrust needle roller bearing and its maintenance skills
  • (2) Affinity between material and lubricant.Causes of damage of Timken thrust needle roller bearing and its maintenance skills
  • (3) The friction coefficient of the paired material under the condition of no lubrication.
  • (4) Microstructure of materials.Causes of damage of Timken thrust needle roller bearing and its maintenance skills
  • (5) Thermal conductivity of the material.
  • (6) The surface energy of the material and the characteristics of the oxide film.
  • Use the oil pump to inject the high-pressure oil into the Timken bearing through the nozzle, and the oil injected into the thrust needle roller 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 thrust needle roller bearing by general lubrication method. At this time, the lubricating oil must be sprayed into the double row deep groove ball bearing by high-pressure injection method, and the position of the nozzle should be placed between the inner ring and the center of the cage.Causes of damage of Timken thrust needle roller bearing and its maintenance skills
  • Use the oil pump to inject the high-pressure oil into the Timken bearing through the nozzle, and the oil injected into the thrust needle roller 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 thrust needle roller bearing by general lubrication method. At this time, the lubricating oil must be sprayed into the double row deep groove ball bearing by high-pressure injection method, and the position of the nozzle should be placed between the inner ring and the center of the cage.
Technical requirements for Timken non-standard bearing