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Shanghai Shang Shaft Bearing Quality Inspection Institute Co., Ltd.

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Address: 301 Shangxue Road, Jiading District, Shanghai

Basic knowledge of ceramic bearing

2020-04-28 14:33

Ceramic bearing as an important mechanical basic parts, because of its excellent performance that metal bearings can not match, high temperature resistance, super strength and so on in the new material world leader. In the past ten years, it has been widely used in various fields of national economy and people's livelihood.

 

Aerospace, navigation, nuclear industry, petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotives, subways, high-speed machine tools, scientific research, national defense and military technology and other fields need to work under special working conditions such as high temperature, high speed, cryogenic, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction and other special working conditions. The indispensable substitution role of ceramic bearings is gradually being recognized.

Advantages

 

First, because ceramics are almost not afraid of corrosion, ceramic rolling bearings are suitable for operation under harsh conditions full of corrosive media.


Second, because the density of the ceramic rolling ball is lower than that of steel, the weight is much lighter, so the centrifugal effect of the outer ring can be reduced by 40% when rotating, and the service life is greatly extended.


Third, the influence of thermal expansion and contraction of ceramics is less than that of steel, so when the gap of the bearing is constant, the bearing can be allowed to work in an environment where the temperature difference changes violently.

 


Fourth, because the elastic modulus of ceramics is higher than that of steel, it is not easy to deform when stressed, so it is beneficial to increase the working speed and achieve higher accuracy.

Main use

 

Ceramic bearings have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, magnetic insulation, oil-free self-lubrication, high speed and so on.

 

It can be used in extremely harsh environments and special working conditions, and can be widely used in aviation, aerospace, navigation, petroleum, chemical, automotive, electronic equipment, metallurgy, electric power, textiles, pumps, medical equipment, scientific research and national defense and military fields. It is a high-tech product for the application of new materials.

 

 

Ceramic bearing rings and rolling body using all ceramic materials, zirconia (ZrO2), silicon nitride (Si3N4), silicon carbide (SiC) three. The retainer is made of polytetrafluoroethylene, nylon 66, polyether imide, zirconia, silicon nitride, stainless steel or special aviation aluminum, thus expanding the application of ceramic bearings.

Application areas

 

Medical equipment, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery.

 

In the fields of aerospace, navigation, nuclear industry, petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotives, subways, high-speed machine tools and scientific research, national defense and military technology, it is necessary to work under special working conditions such as high temperature, high speed, cryogenic, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction, etc. The indispensable substitution role of ceramic bearings is gradually being recognized.

 

 

With the continuous progress of processing technology and the increasing level of technology, the cost of ceramic bearings has been declining. It has been applied in a small range of high, fine and sharp fields in the past, and has been gradually extended to various industrial fields of the national economy. The market price of products has gradually approached practicality, reaching a level acceptable to users. The wave of large-scale application of ceramic bearings has come!

 

Excerpt from pump housekeeper, please contact delete if there is infringement.