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Ceramic Bearing

Ceramic Bearing

2020-04-14

                                   Advantages of editing

First, due to the ceramic almost afraid of corrosion, so the ceramic rolling bearing is suitable for the corrosive fluids in harsh conditions.
Second, because the density of ceramic rolling ball is lower than steel, more much lighter weight, so the external ring spinning the centrifugal effect can reduce 40%, thus greatly extend the service life.
Third, ceramics affected by heat bilges cold shrink is smaller than steel, therefore, when bearing clearance must be permissible bearing in more severe working environment temperature change.
Fourth, due to the elastic modulus of the ceramic is higher than steel, when the stress is not easy to deformation, thus to improve work speed, and achieve higher precision.
Main use edit
Ceramic bearing has a high temperature resistant, cold resistant, wear resistant, corrosion resistant, magnetoelectricity insulation resistance, oilless self-lubrication, high rotation speed.Can be used in extremely harsh environment and the special operating mode, can be widely used in aviation, spaceflight, navigation, petroleum, chemical industry, automobile, electronics, metallurgy, electric power, textile, pumps, medical equipment, scientific research and national defense military and other fields, is the new materials of high-tech products.

Ceramic bearing ring and roller adopts full ceramic material, a zirconia (ZrO2), silicon nitride (Si3N4) and silicon carbide (Sic) three.Retainer with ptfe, nylon 66, acyl of polyether imide, zirconia, silicon nitride, stainless steel or special aviation aluminum manufacturing, so as to expand the application of the ceramic bearing means.

Ceramic bearing (5)

Application field editor
Medical apparatus and instruments, cryogenic engineering, optical instrument, high-speed machine, high-speed electric machinery, printing machinery, food processing machinery.
In aerospace, navigation, nuclear industry, petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotive, subway, high speed machine tools and scientific research and national defense military technology need to be in high temperature, high speed, cryogenic, inflammable, explosive, corrosive, vacuum, electrical insulation, non-magnetic, and other special work under the conditions of dry friction, the ceramic bearing indispensable alternative role is gradually known by people.

Along with the advance of processing technology, craft level is increasing day by day, declining the cost of the ceramic bearing, has been from the past only in some small high, refined, pointed areas within the scope of application, gradually extended to the national economy each industry, product market prices are also gradually close to the practical application, reach the level of user acceptance, the application of ceramic bearing large wave is coming!

Ceramic bearing (3)

Use classification
(1), high speed bearing: with cold resistance, small mechanical elasticity, resistance to high pressure, poor thermal performance, light weight, the advantages of small friction coefficient, can be used in the 12000 r/min to 75000 r/min of high-speed spindle and other high precision equipment;
(2), high temperature resistant bearing: the material itself has resistance to high temperature 1200 ℃, and good self-lubrication, temperature between 100 ℃ to 800 ℃ is not caused by temperature difference expansion.Can be used in the furnaces, high temperature equipment such as plastic, steel;
(3), corrosion resistant bearing: the material itself has the property of corrosion resistance, can be used in strong acid, strong alkali, inorganic, organic salt, water, and other fields, such as electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc.
(4), anti magnetic bearing: because there was no magnetic, so does not absorb dust, can reduce the bearing surface spalling, thus reduce the running noise.Available in the demagnetization device.Precision instruments and other fields.
(5), electric insulation bearing: due to high resistivity, can avoid damage of bearing arc, available in various requirements of the insulation power equipment.

(6), vacuum bearing: for ceramic materials unique oilless self-lubrication properties, in the ultra high vacuum environment, can not overcome the ordinary bearing lubrication problem.Note: the above five categories of bearings, bearing the same set of which can be applied to high temperature, high speed, acid and alkali, magnetic field, the insulation, but due to the different material properties (see table) rare earth ceramic material performance, must ask the customer to choose products according to their own application occasions, to choose the most suitable ceramic bearing material.

Ceramic bearing (2)

Material classification editor
zirconia


Full ceramic bearing magnetoelectricity insulation resistance, wear-resisting corrosion resistance, oilless self-lubrication, characteristics such as high temperature resistance, cold resistance, can be used in extremely harsh environment and the special operating mode.Ring and roller adopts zirconia (ZrO2) ceramic materials, retainer use teflon (PTFE) as standard, generally can also use glass fiber reinforced nylon 66 (RPA66-25), special engineering plastics (PEEK, PI), stainless steel (AISISUS316), brass (Cu), etc.
Silicon nitride


All silicon nitride ceramic bearing ring and roller adopts silicon nitride (Si3N4) ceramic materials, and also can be used commonly RPA66-25, PEEK, PI, and phenolic fabric bakelite tube, etc.Compared SiN4 system full ceramic bearing ZrO2 materials can be applied to a higher speed and load capacity, and is suitable for the higher ambient temperature.At the same time can provide rigid precision ceramic bearing spindle used for high speed and high precision high, the highest manufacturing accuracy of P4 to level UP.
Full ball


Full ball full ceramic bearing side with ball gap, with no cage structure design, can be more than standard bearing load of the structure of ceramic ball, so as to improve the load capacity, also can avoid the cage material limit, can achieve the ceramic type cage full ceramic bearing corrosion resistant and temperature resistant effect.This series of bearing is not suitable for high speed, when installation should pay attention to the gap surface mounted on one end of the don't carry axial load.
hybrid


Ceramic ball, especially the silicon nitride balls with low density, high hardness, low friction coefficient, good wear resistance, self-lubrication and rigidity, especially suitable for high speed, high precision and long life of hybrid ceramic ball bearing roller (inside and outside the circle of metal).Generally, both inside and outside circle bearing steel (GCr15) or stainless steel (AISI440C), can choose ZrO2 ceramic ball, Si3N4, or SiC materials.

Ceramic bearing (6)

Classifying editor
Deep groove ball bearings
(technical level is: P4, P5, P6, P0) deep groove ball bearing, the most representative of rolling bearings, the wide range of USES, can bear radial load and two-way axial load.Suitable for high speed rotation and requiring low noise, low vibration or steel bearing cannot be applied by the high temperature, cold, corrosion, magnetic field, the insulation, and other fields.
Self-aligning ball bearing


Self-aligning ball bearing outer ring raceway is spherical, automatic self-aligning, can supplement not concentricity and deflection errors.Used to produce shaft and different heart or shaft deflection shell parts and high temperature, low cold, corrosion, self-aligning parts of the magnetic field of insulation, etc.Note: no more than 3 degrees.                                


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