In order to solve the NSK bearings seal issues, our company made the following specific technical requirements:
(1) to prevent the sealing cap is loose and oil seal off;
(2) oil seal for wear resistance, aging resistance, long life, can reach 1 in overhaul period (5A) or more;
(3) to prevent dust and water intrusion, prevention of oil leakage, seepage of oil, in the sealing performance of oil seal lifetime good, stable and reliable;
(4) load and good operating performance, can effectively improve the NSK bearing service life and safety and reliability;
(5) could apply to existing NSK bearing device for new and retrofit use.
Experimental study on the early results of analysis: power return oil seal than traditional oil seal performance is superior, but found in the van loading test, due to the application of harsh environmental conditions, its role in returning and sealing properties are lost.
Therefore, power should return oil seal in the light pollution of indoor application on the device or device within the NSK bearing seal can be fully effective; for non-contact seal, seal is not very reliable when its structure was too simple. Therefore, in order to meet technical requirements issues and drawing on the bus experience of axle-box sealing, NSK bearings sealed the new structure should be to improve the design of the development of non-contact seals.


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