Judge INA turbocharger bearing fault damage criteria and methods

From peeling, indentation, rust, crack and wear will be reflected in the bearing vibration measurement, INA bearing vibration damage of bearing is very sensitive, so, the supercharger bearing through the use of special bearing vibration measuring device ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Due to the measured values of bearing or sensor installation position and different using conditions, thus requiring prior to each machine is analyzed by the measured value of the determined after judgment standard. As INA bearing even with slight stripping damage, also an exception and irregular, and therefore with the sound of the measuring device can distinguish, made a sound, for the operation of the supercharger bearing to check the size of the rolling sound and quality, have the effect of prevention in advance. 1. Metal flake bearing raceway surface rolling body and the inner and outer ring raceway surface under the role of the periodic pulse load, resulting in a periodic change of contact stress. When stress cycles after reaching a certain value, the rolling element bearings, their work within or surface produce fatigue spalling. If INA bearing load is too big, can make the fatigue. In addition, the supercharger bearing installation is not straight, shaft bending, also can produce roll flaking off. Bearing raceway fatigue spalling can reduce the running accuracy of shaft vibration and noise in the organization. 2. Bearing burn burn INA bearing the heat tint of raceway and rolling body. Burns is usually the cause of insufficient lubrication, lubricating oil quality does not conform to the requirements or metamorphism, and tight bearing assembly, etc. 3. Plastic deformation of bearing raceway and roller contact surface appear uneven pits, bearing produce plastic deformation. The reason is bearing under static load or shock loading, local stress exceeds the yield limit of material on the surface of the work, this kind of situation usually happened in the low-speed rotation of the bearing. 4. Bearing race crack cause crack of the bearing race may be bearing fit tight, INA bearing foreign or inner ring is loose, inclusive of supercharger bearing deformation, installation of bearing surface processing etc. 5. Cage fracture reason is the insufficient lubrication, rolling body breakage and seat skew, etc. 6. Retainers metal adhesion on the rolling body possible reason is that roller was stuck in a cage or insufficient lubrication. 7. Seat ring raceway serious wear and tear may be fall into the object in seat, lack of lubricating oil or lubricant brand is not appropriate. If using the oil hole can directly measure temperature of bearing outer ring, is more appropriate. In general, the supercharger bearing temperature, average according to the bearing on the surface of the outdoor temperature can be predicted. If the appropriate lubrication, installation department, the bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. Usually, the temperature of the bearing with operation began to slowly rise, 1 - After 2 hours to reach steady state. INA bearing normal temperature due to the heat capacity of the machine, heat dissipating capacity, rotational speed and load. When necessary, the use of thermal device can monitor the working temperature of bearing, and implement e. automatic alarm when the temperature is more than the household or stop to prevent the shaft accidents.