Ceramic Bearing for the defense industry in the harsh environment of the adjustment, heavy load, low temperature, no lubrication conditions and development, is the new material, technology, new structure of the perfect combination. Turning it into civil technology, Ceramic Bearing can completely cover all the applications of precision, medium and high speed all steel bearings. The diameter and diameter of ceramic bearings are the standard sizes of P4, P5 and P6 of steel bearings in the country. Due to the low thermal expansion coefficient of ceramic materials, small heat transfer performance and small elasticity measurement, the installation coordination needs attention.
The performance of ceramic bearings is far better than all steel bearings, life can be more than the current use of bearing life 3 times times more than, can save a lot of downtime, reduce scrap rate, reduce inventory bearing spare parts.
Compared with the bearing steel performance, the weight is 30%-40% of the bearing steel, which can reduce the increase and skidding of the dynamic force caused by centrifugal forces. Because of high wear resistance, rotational speed is 1.3-1.5 times times of bearing steel, can reduce the high speed of the channel surface damage caused by rotation. The modulus of elasticity is 1.5 times times higher than that of bearing steel. The elasticity of the force is small, which can reduce the deformation caused by the high load. Hardness is 1 time times the bearing steel and can reduce wear. Compression is 5-7 times the bearing steel. The thermal expansion coefficient is less than 20% of the bearing steel. Friction coefficient is less than 30% of bearing steel, can reduce the heat caused by friction, can reduce the premature spalling due to high temperature failure. Tensile, flexural and metal are equal. Imported bearings
First, because ceramics are almost not afraid of corrosion, ceramic rolling bearings are suitable for operation under harsh conditions that are covered with corrosive media.
Second, because the density of ceramic rolling balls is lower than steel, the weight is much lighter, so the centrifugal effect of the outer ring can be reduced by 40%, and the service life is greatly prolonged.
Third, ceramic is affected by the expansion of the expansion of the smaller than steel, so in the bearing gap is certain, the bearing can be allowed to change in the temperature of the more intense environment work.
Finally, because the elastic modulus of ceramics is higher than that of steel, it is not easy to deform when it is subjected to force.
Ceramic bearings with high temperature, cold, wear-resistant, corrosion resistance, magnetic insulation, oil-free self-lubricating, high speed and other characteristics. Can be used in extreme harsh environment and special conditions, can be widely used in aviation, aerospace, navigation, petroleum, chemical, automotive, electronic equipment, metallurgy, electric power, textile, pumps, medical equipment, scientific research and defense military and other fields, is the application of new materials High-tech products. Ceramic bearing rings and rolling body using all ceramic materials, there are zirconia (ZrO2), silicon nitride (SisN4), silicon carbide (sic) three kinds. The cage is made of PTFE, nylon 66, polyether imide, zirconia, silicon nitride, stainless steel or special aviation aluminum, which expands the application surface of ceramic bearings. Application areas: Medical devices, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery.
(1) High speed bearing: it has the advantages of cold resistance, small force elasticity, large resistance to pressure, poor thermal conductivity, light weight and small friction coefficient, which can be used in 12000 rpm/min-75000 rpm high speed spindle and other high-precision equipment;
(2), high temperature bearing: the material itself has a high temperature resistance of 1200 ℃, and self-lubricating good, the use of temperature between 100℃-800℃ do not produce due to the temperature difference caused by the expansion. Can be used in furnace, plastic, steel and other high-temperature equipment;
(3), corrosion-resistant bearings: The material itself has the characteristics of corrosion resistance, can be used in strong acid, alkali, inorganic, organic salt, seawater and other fields, such as: electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment.
(4), non-magnetic Bearings: Because no magnetic dust, can reduce the bearing premature spalling, noise and so on. Available in demagnetization equipment. Precision instruments and other fields.
(5), electrical insulating bearings: Because of high electrical resistance, can be shielded from arc damage bearings, can be used in a variety of electrical equipment requirements insulation.
(6), vacuum bearing: Because of the unique oil-free self-lubricating characteristics of ceramic materials, in the ultra-high vacuum environment, can overcome the ordinary bearing can not realize the problem of lubrication. Note: The above five categories of bearings, the same set of bearings can be applied to high-temperature, high-speed, acid-base, magnetic field, not insulation, but because the material properties are different (see rare earth Ceramic material performance table) so please select the product, according to their own application of the occasion, to select the most suitable material for ceramic bearings.
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