Installation and adjustment technology to ensure the stable operation of ina turbocharged bearing
Installation and adjustment technology to ensure the stable operation of ina turbocharged bearing
2022年3月31日
Specific judgment method for maintenance of ina inlaid solid lubricated bearing
Specific judgment method for maintenance of ina inlaid solid lubricated bearing
2022年3月31日

Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing

  • The judgment criteria vary according to mechanical properties, importance and inspection cycle. In case of the following damage, INA Bearing shall not be reused and must be replaced. In the process of using inlaid solid lubricated bearings, grease is very critical. If deteriorated grease is used, it will not only fail to play its due role, but also damage the bearing.

Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing

  • Twist the lubricating oil between the thumb and index finger and grind it repeatedly. The better lubricating oil hand feels lubricity, less wear debris and no friction. If it feels a large friction feeling such as sand particles between the fingers, it indicates that there are many impurities in the lubricating oil and it can not be used again. It should be replaced with a new lubricating oil.Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • Raceway sound of bearing and its control method raceway sound is a smooth and continuous sound made by the rolling body rolling on the raceway surface when the embedded solid lubrication bearing is running. It is a unique basic sound that will occur in all rolling bearings. 
  • The general INA Bearing sound is the raceway sound plus other sounds. The raceway sound of ball bearing is irregular, and its frequency is above 1000Hz. Its main frequency does not change with the speed, but its total sound pressure level increases with the speed. Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • For the bearing with loud raceway sound, the sound pressure level of raceway sound decreases with the increase of viscosity; For bearings with low raceway noise, the sound pressure level changes from decrease to increase when the viscosity increases to more than 20mm2 / s. 
  • The greater the rigidity of the bearing pedestal, the lower the total sound pressure level of the raceway sound. Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • If the radial clearance is too small, the total sound pressure level and dominant frequency of raceway sound will increase sharply with the decrease of radial clearance. 
  • The methods to control the sound of raceway are: select low-noise bearings, that is, bearings with small waviness, and carefully select the service conditions. Raceway noise often affects the noise of the whole machinery. Reducing raceway noise can reduce the noise of the whole machinery.Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • Causes of corrosion:
  • As ina bearing is affected by various internal and external factors, the bearing is corroded more and more. Generally speaking, there are six main reasons:
  • 1. The chemical composition and structure of bearing metal materials.vMaintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • 2. The metal surface finish of the bearing is corroded by the difference of oxygen concentration.Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • 3. The bearing is in contact with other metal surfaces.
  • 4. The metal surface of the bearing is in contact with various environmental media.
  • 5. The bearing bears the influence of ambient temperature and humidity.
  • 6. In addition, human sweat is also the cause of INA Bearing corrosion. Its pH value is 5 ~ 6. Therefore, in order to prevent corrosion caused by hand sweat, installation and production personnel should wear gloves and do not touch the embedded solid lubricated bearing with their hands.Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • Precautions:
  • In order to prevent the bearing from being corroded, some preventive measures can be taken. How to apply antirust oil on it to prevent rust. Here are three oiling methods.
  • 1. The method of making a layer of antirust grease adhere to the ina bearing surface by soaking. For some small bearings, they can be soaked in antirust grease, and the oil film thickness can be achieved by controlling the temperature or viscosity of antirust grease.
  • 2. Method of brushing: when brushing, pay attention to evenly apply it on the surface of inlaid solid lubricated bearing to avoid accumulation. At the same time, pay attention to prevent missing coating.Maintenance method for preventing corrosion of ina inlaid solid lubricated bearing
  • 3, spray method: for some large rust preventive is not suitable for oil immersion method, spray method is suitable for solvent dilution antirust oil or thin layer antirust oil.
  • However, it should be noted that this method must adopt perfect fire prevention and labor protection measures.
Control of Material Factors Affecting Bearing Life