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DetermEDAtion of EDA bearings maintenance cycle technical state machinery in use process and its components will be gradually reduced, leading to decreased reliability, partial or complete loss of ability to work. In order to make the machinery to maintain a good level of reliability of technical performance and high reliability, it is necessary to establish and improve the management and control system. In practice, ways to realize the function of control system reliability is two. The first way of super, keep the technical performance of machinery in the miniature bearings maintenance system: the second way is the technical performance recovery machinery through scientific repair system.
Physical quantity 1, characterization of EDA bearings vibration vibration displacement, vibration velocity, vibration acceleration of three.
The vibration system composed by 2, the design parameters of the bearings structure stiffness, flexibility, quality, damping in the operating conditions will produce and mechanical adaptation.

Vibration of 3, manufacturing deviation caused by the deviation in the processing, smaller, the smaller the vibration.
4, operating conditions: installation conditions, speed, axial loading direction, as well as values.
Factors affecting the miniature bearings vibration:
1, the steel ball surface roundness, roughness, surface roughness is the most influential factors on the vibration of the bearings components;
2, the shape error and surface of the inner ring and outer ring raceway surface roughness;
3, once again bearings cleanliness and lubricant quality etc..
EDA bearings maintenance to prevent machinery and parts, at the critical state in advance, or delay the product reaches the critical state of the time. Therefore, the prevention of detection the performance parameter mechanical maintained at rated within, thus prevent fault: or by delaying the process technology parameters and reduce the friction element can damage, prolong mechanical work and life.