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Three major factors manufacturing process and quality of materials determines the supercharger bearing quality.
Failure is mainly due to bearing two factors deficiency and overload. When the load exceeds the limit strength of the material as a result of parts breaking overload fracture. Overload causes the main host of sudden failure or improper installation. Eda bearing parts of the micro cracks, shrinkage, bubbles, large foreign materials, organizations and local overheating burn defect in defect caused by fracture in severe shock or vibration overload also, known as the defect fracture. It should be pointed out, the turbocharger bearings in the manufacturing process, the raw materials into the factory inspection, forging and heat treatment quality control, process control equipment can be correctly analyzed by the existence of the defect, the control must be strengthened in future. But in general, failure mostly overload failure bearing fracture usually appear.
The main tasks of bearing failure analysis, is based on the analysis of the data and the failure form of the large amount of background material,, identify the main factors causing bearing failure, so as to put forward the improvement measures, to extend the supercharger bearing service life, avoiding early failure of Eda bearing a sudden.
Bearing in the work, due to the impact of external or internal factors, so that the original clearance change, accuracy, and even cause "killed" called the clearance change failure. External factors such as excessive interference, the installation is not in place, the temperature rise caused by the expansion of the quantity, instantaneous overload, internal factors such as residual austenite and residual stress in an unstable state, is the main reason that causes the failure of the clearance change.
Metallurgical quality of Eda bearing materials are the main factors influencing the early failure of rolling bearings once. With the metallurgical technology (such as vacuum degassing of steel bearing) progress, improved quality of raw materials. Raw materials quality factors of failure analysis of the proportion has decreased significantly in the supercharger bearing, but it is still one of the main factors of bearing failure. Proper selection is still bearing failure analysis must be considered.