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Ceramic Bearing ppt

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Ceramic bearings are typically constructed with a ferrous inner and outer ring or race with ceramic balls in the place of steel. Ceramic bearings offer many advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, lower friction and more. Ceramic balls are also nonconductive. Ceramic bearings are available in all standard industry configurations such as, angular bearings, thrust bearing, pillow block bearing, needle bearings, and roller bearings.

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Ceramic Bearing ppt

  1. 1. Ceramic Ball Bearing Visit www.seminarlinks.blogspot.com to Download
  2. 2. INTRODUCTION • Ceramic bearings are typically constructed with a ferrous inner and outer ring or race with ceramic balls in the place of steel. • Ceramic bearings offer many advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, lower friction and more. • Ceramic balls are also nonconductive. Ceramic bearings are available in all standard industry configurations such as, angular bearings, thrust bearing, pillow block bearing, needle bearings, and roller bearings.
  3. 3. PROPERTIES • Ceramic bearings balls are typically made from (Si3N4) ceramic silicon nitride and have greater hardness than steel balls resulting in longer ball life. • Ceramic bearing balls have smoother surface finishes than most steel bearing balls. • Thermal properties are also better steel balls which result in less heat generation due to friction at high speeds. • To manufacture a extra fine surface finish on ceramic balls, the balls are elevated with a magnetic field and then polished with plasma stream. • Ceramic bearings balls are rated at higher spin rates than steel bearing balls.
  4. 4. • Ceramic bearing balls can weigh up to 40% less than steel ones, depending on size and material. • This reduces centrifugal loading and skidding, so hybrid ceramic bearings can operate 20% to 40% faster than conventional bearings. • This means that the outer race groove exerts less force inward against the ball as the bearing spins. • This reduction in force reduces the friction and rolling resistance. • The lighter balls allow the bearing to spin faster, and uses less energy to maintain its speed.
  5. 5. Ceramic Balls for Bearings Usually Colored: • White • Green • Shiny Black • Dark Grey Ceramic Hybrid Bearing Ceramic Bearing PHYSICAL APPEARANCE
  6. 6. PREVENT ELECTRICAL ARCING • When electrical current passes across bearings, a washboard pattern appears on the raceways, along with a darkened grey appearance. • Typical results include bearing surface damage, premature aging of the lubricant. • The natural insulating properties of ceramic material eliminates this type of damage. Visit www.seminarlinks.blogspot.com to Download
  7. 7. LOWER MAINTENANCE COSTS • Extending the service life of a bearing without increasing maintenance cuts equipment operating costs. • The initial cost of a hybrid bearing may be higher than a standard steel bearing, but the difference is quickly recovered in maintenance savings.
  8. 8. INCREASE SERVICE LIFE • Because of the properties of ceramics, a hybrid bearing's service life can be up to 10 times that of a standard steel bearing, reducing the need for maintenance on your machine as well as the costly interruptions in production.
  9. 9. EXTEND GREASE LIFE • The hybrid bearings run cooler and can operate with thinner lubricant films than conventional bearings. • The result? Less aging of the grease, longer relubrication intervals, and increased service life vs. standard bearings in the same operating conditions.
  10. 10. REDUCE WEAR FROM VIBRATION • Equipment exposed to static vibration risks false brinelling, (erosion of the surfaces within the ball and raceway contacts), which can lead to spalling and premature failure. • Lighter weight ceramic balls and dissimilar materials reduce the risk of false brinelling damage considerably.
  11. 11. LOWER OPERATING TEMPERATURES • Because ceramic balls are only 40% as dense as steel balls, the centrifugal load that they generate is less and the internal bearing friction is lower. • The lower density and friction enables cooler running under the same operating conditions, or even higher rotational speeds.
  12. 12. REDUCE WEAR FROM CONTAMINATION • Solid particle contaminants can create dents in bearing rolling surfaces and raised edges around those dents. • This condition causes noise and premature wear as the steel balls roll over those surfaces. • Harder ceramic balls smooth the surface roughness with no material removal, thereby reducing noise and wear while extending bearing service life.
  13. 13. EXTRA-LARGE BORE SIZES FOR WIND POWER APPLICATIONS • Electric current passage is the major cause of bearing damage in wind power generator applications, often resulting in premature bearing failure, generator breakdown and unplanned turbine down time. • Now, hybrid ceramic ball bearings are available in sizes specifically designed to fit these turbines, reducing operating costs, the risk of costly repairs and lost production for new and installed generators.
  14. 14. TECHNICAL CHARTS
  15. 15. Visit www.seminarlinks.blogspot.com to Download
  16. 16. APPLICATIONS • Aircraft generators • Biotechnology equipment • High speed machining and grinding spindles • High speed mills • Precision instruments • Pumps and compressors
  17. 17. CONCLUSION Due to the world's depleting iron stores it is important to look to alternative production methods of steel components. Ceramic bearings are a good way to do this as they posses equal, if not better, qualities in service than their steel rivals. Therefore a move into this may be seen as a corporate and social responsibility, which would increase popularity.
  18. 18. REFERENCE • https://www.ukessays.com/essays/engineering/the-manufacture-of-ceramic-bearings.php • http://www.ceramicbearing.com/indextemp.html • http://www.engineersedge.com/bearing/ceramic_bearings.htm • http://ftp.republicsales.com
  19. 19. Thank YouVisit www.seminarlinks.blogspot.com to Download

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