Why is the Seal Structure of Single Row Deep Groove Ball Bearings More and More Widely Used?

For general-purpose bearings, especially single row deep groove ball bearings, sealed bearings have become the dominant structure type.Seals are generally divided into two basic types: one is contact sealing, that is, direct contact between the sealing element and the rotating parts, and the contact is subjected to a certain elastic pressure, and the contact is subjected to relative motion and frictional heat. It mainly includes felt seals, rubber seals, V-ring seals, spring seals, etc. The second is non-contact sealing, that is, the sealing element and the rotating parts do not contact, rely on a narrow gap to play a sealing role, no frictional heat and wear, can be used at high speeds and high operating temperatures.It mainly includes gap seal, curved road seal (labyrinth seal), dust cover seal, etc.

Sealed bearings can simplify the sealing structure of the support, and improve the use of bearing performance, so the development of this type of product is fast, the demand is increasing, has accounted for about 90% of the production of single row deep groove ball bearings.There are various types of bearing seal structures, including contact seals, non-contact seals and light contact seals, to meet different needs. However, the main function is to prevent grease leakage and the intrusion of external foreign bodies.

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