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From spalling, indentation, rust, crack, wear will be reflected in the measurement of bearings vibration, EDA 203 specs bearings vibration of bearings damage is very sensitive, so, the turbocharger bearingss through the use of special bearings vibration measuring device (frequency analyzer etc) can measure the magnitude of vibration, through frequency can not be inferred from abnormal situation. Due to the measured value and different bearings conditions of use or the sensor installation location, therefore require prior to each machine measurement comparison criteria.
Because the EDA 203 specs bearings even a slight separation of the injury, also issued abnormal sound and irregular sound, so sound measuring device can be resolved, the phonometer, size and quality of the turbocharger bearings in operation rolling sound to carry on the inspection, played the role of prevention in advance.
The 1 raceway surface metal flake
bearings rolling body and the inner, outer ring raceway surface are subjected to cyclical fluctuation load, resulting in periodic changes
The contact stress. When the stress cycle number reaches a certain value, will produce fatigue spalling on the rolling body or the inner, outer ring raceway surface. If the EDA 203 specs bearings load is too large, will exacerbate this fatigue. In addition, the supercharger bearings installation is not correct, shaft bending, also have a raceway spalling phenomenon. Raceway on bearings fatigue peeling can reduce the running accuracy of the shaft, the vibration and noise mechanism.
2 bearings burn
EDA 203 specs bearings burn the raceway, the rolling body temper. Burn the reason is the general lack of lubrication, lubricating oil quality does not meet the requirements or deterioration, and the supercharger bearings assembly too tight.
3 plastic deformation
Uneven pits and roller roller contact surfaces of a bearings, the bearings plastic deformation. The reason is the effect of bearings static load or impact load, the local stress more than material yield limit of the working surface, this
A generally occurs on the low speed rotation of the bearings.

4 bearings ring crack
Causes of bearings ring crack may be bearings with the tight, foreign or EDA 203 specs bearings inner ring is loose, deformation tolerance a supercharger bearings, surface processing, installation of bearings bad etc..
5 cage fragmentation
The reason is the lack of lubrication, rolling crush, seat tilt.
6 keep the metal adhesion frame on the rolling body
The possible reason is the rolling was stuck in a cage or lack of lubrication.
The 7 raceway badly worn
May be in the seat ring into the foreign body, lack of lubricating oil or lubricating oil brand not appropriate.
If the uses of oil hole can directly measure the temperature of the bearings outer ring, is more appropriate. In general, the supercharger bearings temperature, generally on the basis of bearings outside of room temperature can be speculated. If the lubrication, install appropriate, bearings temperature will rise rapidly, there will be abnormal high temperature, then we must stop, take the necessary preventive measures. Usually, the temperature of the bearings with running slowly rising, reach a steady state after 1-2 hours. The normal temperature of EDA 203 specs bearings due to the heat capacity, the machine heat dissipating capacity, speed and load and different. When necessary, the use of thermal exchanger can always monitor the bearings temperature, and when the temperature exceeds the specified value alarm households or stop to prevent burning shaft accident.