Thrust Ball Bearings The vibration of the bearing
The vibration of the bearing
NTN thrust ball bearing vibration is sensitive to bearing damage, such as peeling, indentation, rust, crack and wear will be reflected in the bearing vibration measurement, therefore, through the use of special bearing vibration tester (frequency analyzer, etc.) can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. The measured value is different from the use condition of the NTN thrust ball bearing or the location of the sensor installation. Therefore, it is necessary to analyze the measured value of each machine in advance to determine the judging standard.
The temperature of the bearing
The temperature of NTN thrust ball bearing can be deduced from the temperature of the bearing outside. If the oil hole can directly measure the outer ring temperature of the NTN thrust ball bearing, it is more suitable.
Normally, the temperature of NTN thrust ball bearing starts to rise gradually with the bearing operation, reaching a steady state after 1-2 hours. The normal temperature of NTN thrust ball bearing is different from the heat capacity, heat, speed and load of the machine. If the lubrication and installation parts are suitable, the temperature of the bearing will rise sharply. Abnormal high temperature will occur. The operation must be stopped and necessary precautions should be taken.
The heat sensor can monitor the working temperature of NTN thrust ball bearing at any time, and automatically alarm or stop the combustion axis accident when the temperature exceeds the regulation value.
The use of high temperature often indicates an anomaly. High temperature is also harmful to the lubricant of NTN thrust ball bearing. Sometimes the bearing overheating can be attributed to the lubricant of the bearing. If the bearing temperature for a long time even the transfer of more than 125 ℃ lower bearing life. Causes of high temperature bearing include: insufficient lubrication or excessive lubrication, lubricant. It contains impurities, excessive load, NTN thrust ball bearing damage ring, gap, and high friction caused by oil seal etc.
Therefore, it is necessary to continuously monitor the temperature of the NTN thrust ball bearing, whether measuring the bearing itself or other important parts. Any temperature change can indicate a failure if the operating condition is constant.
NTN thrust ball bearing temperature measurement can be regularly with the aid of thermometer, digital thermometer, for example, can accurate bearing temperature measurement and display by ℃ or Fahrenheit units.
The importance of the NTN thrust ball bearing means that when it is damaged, it will cause the equipment to be shut down. Therefore, such bearings should be fitted with a temperature detector.
Normally, the NTN thrust ball bearings have a natural temperature rise after the lubrication or relubrication and continue for one or two days.
Cleaning is very important for rolling NSK imported bearings. The surface roughness of the NSK bearing rings and rolling elements is usually 1/10 mu m, so the smooth surface is very sensitive to the damage caused by the pollutants. Rotational surface lubrication layer is usually between 0.2 ~ 1 mu m, is greater than the lubricant type size particles of impurities are influenced by the excessive rolling rolling element and partial pressure in the NSK bearing steel imports, eventually lead to permanent material fatigue. In addition to this, the dust particles in the external environment can be up to 10 mu m, which can also cause damage to NSK imported bearings. Therefore, the clean and clean environment is vital for the storage and installation of NSK imported bearings.