Sealed bearings are widely used in motors, household appliances, machinery and equipment, automobile, motorcycle, aviation
and aerospace and other fields, the bearing performance, accuracy and lifetime reliability levels directly affect the quality of the supporting host
Volume. Performance sealed bearings in a sense more important than the fatigue life; sealed Ina number of supporting host
Axis
By Order for performance changes can cause the bearings to fail destruction. Therefore, only study the performance of sealed bearings, improved production
Strengthen process controls and product design; improve
Product quality in order to continue to narrow the gap with the international advanced level.
The sealed bearings in the world in recent decades the rapid development and production soared. Sealed deep groove ball bearings of the total
More than 50% of the production, of which Japan accounted for more than 80 percent, deep groove ball bearings in the United States more than 75% sealed bearings. Country
Sealed bearing production accounts for the proportion of deep groove ball bearings increased from 10% in 1985 to 30 percent in 1990, now has reached
To 70%, and continues to grow, China has become the largest producer of sealed bearings. Research and development of sealed bearings
Is an important task for the bearing industry, now introduced the following two aspects.
Factors that affect the sealed bearing performance
Requirements for sealing the bearing performance is usually mainly in the following aspects: friction torque; high-speed performance
(I.e. speed performance, NSK is divided into contact with non-contact two kinds, KOYO, contact, on-contact, light contact with three kinds
Speed parameters); Grease seal; fire resistance; temperature range. In terms of design, manufacture and
Test assessment and improvement are carried out around this performance. Sealed bearing reliability (i.e., the provisions of Article
Achieved or completed (meet) in terms of performance, capacity or level), the above performance both mutual spear and
Shield, but also each other uniform, and therefore must be considered in the design and manufacture.



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