In order to make the surface of Koyo needle roller bearing parts remain large compressive stress after quenching and tempering, carburizing or nitriding atmosphere can be introduced during quenching and heating for short-term surface carburizing or nitriding.
Because the actual carbon content of austenite during quenching and heating of this steel is not high, which is far lower than the equilibrium concentration shown in the phase diagram, it can absorb carbon (or nitrogen). According to different uses, it is necessary to select specially designed bearings with requirements on accuracy,
clearance, cage structure, grease and so on. However, there is no certain order and rules for the selection of bearings. Priority should be given to the conditions, performance and related matters required by Koyo needle roller bearings, especially practical.
In order to make Koyo needle roller bearing give full play and maintain its due performance for a long time, regular maintenance (regular inspection) must be carried out. Through proper regular inspection, it is very important to find faults early and prevent accidents before they happen,
which is very important to improve productivity and economy. Lubrication method: the lubrication method of Koyo needle roller bearing is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, choose the lubrication method suitable for the use conditions and purposes.
If only lubrication is considered, the lubricity of oil lubrication is dominant. However, grease lubrication has the advantage of simplifying the surrounding structure of Koyo needle roller bearing. Compare the advantages and disadvantages of grease lubrication and oil lubrication.
the carbon content of quenched martensite (i.e. the carbon content of austenite after quenching heating), retained austenite and undissolved carbide mainly depend on the quenching heating temperature and holding time. With the increase of quenching heating temperature (time is certain),
the amount of undissolved carbide in the steel decreases (the carbon content of quenched martensite increases) When the amount of retained austenite increases, the hardness first increases with the increase of quenching temperature, reaches the peak value, and then decreases with the increase of temperature.
As long as the bearings in order to maintain the original performance as intact as possible, they should be maintained and maintained in front, so as to prevent accidents, ensure the reliability of operation, improve productivity and economy.
Corresponding mechanical operation and maintenance operation standards, regular operation and maintenance conditions. This includes monitoring the operation status, replenishing or changing lubricants, and regular inspection and removal.
As a problem of maintenance operation, the rotation sound, vibration, temperature, lubrication conditions, etc. of Koyo needle roller bearing have been.
In the process of using NSK self-aligning ball bearing, the temperature rise is easy to occur. When the temperature of NSK self-aligning ball bearing rises, first Koyo Needle Roller Bearing judge whether it is misoperated. If it does rise, the following treatment shall be done:
1. Check whether the cooling water pressure, water flow and pipeline system are normal. If the water pressure is low, the filter may be blocked and cannot be handled in time, it can be shut down for treatment. When it is Koyo Needle Roller Bearing confirmed that it can work, it can be put into use.
2. Check the oil pressure of the governor. If the oil pressure is low, the cooling water hydraulic valve may be closed.
3. Check whether the imported bearing has abnormal sound and whether the swing of NSK self-aligning ball bearing is abnormal.
4. Take an oil sample to observe whether the oil color has changed, and test to see whether it has Koyo Needle Roller Bearing deteriorated. If the deterioration is confirmed, stop the machine and replace it with new oil.
5. Check whether the oil level of the oil gauge is normal. If not, check whether the oil drain valve of the oil tank is tightly closed. If it has been closed tightly, oil shall be added. If it is oil leakage from the sealant pad, it shall be shut down for treatment.
Vibration is very sensitive to the damage of NSK self-aligning ball bearing. Peeling, indentation, corrosion, crack and wear will be reflected in the vibration measurement of NSK self-aligning ball bearing.
Therefore, the magnitude of vibration can be measured by using a special bearing vibration meter (frequency analyzer, etc.), and the specific situation of abnormality can not be inferred through frequency division. The measured values are different due to the service conditions of NSK self-aligning ball bearing or the installation position of sensor,
so it is necessary to analyze and compare the measured values of each machine in advance to Koyo Needle Roller Bearing determine the judgment standard.
Let’s take a look at the impact of temperature on imported bearings. Using high temperature often indicates that NSK self-aligning ball bearings are in an abnormal situation. High temperature is also harmful to the lubricant of the bearing.
Sometimes bearing overheating can be attributed to the lubricant of the bearing. If the temperature of NSK self-aligning ball bearing exceeds 125 ℃ for a long time, the service life of NSK self-aligning ball bearing will be reduced. The causes of high temperature bearings include insufficient or excessive lubrication and lubricant.
It contains impurities, excessive load, ring damage of NSK self-aligning ball bearing, insufficient Koyo Needle Roller Bearing clearance, high friction caused by oil seal, etc.
Therefore, it is necessary to continuously monitor the temperature of NSK self-aligning ball bearing, whether it is measuring the bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a fault has occurred.
The regular measurement of NSK self-aligning ball bearing temperature can be aided by thermometer, such as digital thermometer, which can accurately measure the temperature of NSK self-aligning ball bearing and display it in ℃ or Fahrenheit.
Important bearing means that when it is damaged, it will cause equipment shutdown. Therefore, this kind of NSK self-aligning ball bearing should be equipped with temperature detector.