Technology overview

Recent development of the rolling bearing IKO, two end DouAn equipped with corresponding sealing device. Its role is to protect the bearing on one hand the grease inside the (oil) in use won't run, ensure bearing in lubricating state; On the other hand is to protect the bearing, makes outside dust or harmful gas bearing not into the inner chamber, in order to avoid damage of bearing. Common are rubber or engineering plastics sealing ring, also have made of steel plate blunt sealing ring (or said that dust cover). Sealing structure is varied, the effect of the seal. Sealing and bearing a gap between the, says non-contact seal, the gap is smaller, seal the better, but allow shaft speed the smaller area; Sealing and bearing no gap between the, says contact seal, sealing ring contact of the lip contact area, the greater the sealing the better, but allowed the speed of the shaft and smaller. Sealing technology research and development is mainly applied in different working conditions corresponding sealing devices, and the sealing ring material and the corresponding the grease of harmony.

The domestic and foreign development trend

 
Japan's several big bearing company (seiko, Japan etc) represents the NSK bearing seal technology development direction. They in the development of sealing technology development direction and bearing device technology early history, the depth, the seal a mature technology. From single lip seal to sealing lip more, from contact seal developed non-contact seal, etc.; From product type look, ball bearing, roller bearings are all available. With the international development trend in China, also developed with sealing ring of deep groove ball bearings, water pump bearing, railway (tapered roller) bearing, needle bearing and short cylindrical roller bearing a few kinds big bearing, deep groove ball bearing production of the largest, the most widely application. According to the national technical supervision bureau of China's recent seal bearing quality testing result, China's seal bearing structure design problem is bigger, sealing the result is bad, leakage phenomenon more serious fat, users a strong response. The analysis, the main reason is China's current seal design structure is unreasonable, inner ring without seal grooves, plus manufacturing precision is not higher. Therefore, our country bearing seal technology development trend is: to the deep groove ball bearings for represent, carry out sealing technology test, to search for the optimal sealing ring structure and the best seal clearance; Carry out sealing material research, looking for wear resistance, ageing resistance, high temperature resistant and corrosion resistant material, in order to improve the contact the seal life, the development of high temperature conditions or harmful atmosphere in under the working conditions of a technical foundation sealing ring.
 



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