Development prospects of ceramic reel bearings

First. Overview of research and development of domestic and foreign ceramic reel bearings

Ceramic reel bearings are a wonderful work in the bearing category, a good combination of new technology, new materials and new structures. As the basic part for the rotation of carrier machinery, it has been widely used in various special environments and harsh environments due to its excellent performance unmatched by metal bearings. Because of its high temperature resistance, low cold resistance, corrosion resistance, insulation, magnetic resistance, low density, high strength and other properties, it is unique in the world of new materials. In the past ten years, it has been used more and more widely in various fields of national economy and people's livelihood. In the fields of aerospace, navigation, nuclear industry, petroleum, chemical industry, light textile industry, machinery, metallurgy, electricity, new energy, food, locomotive, subway, high-speed machine tools and scientific research defense military technology, etc. Inflammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction, corrosive and other special working conditions, the indispensable role of ceramic reel bearings is gradually being recognized. With the continuous advancement of processing technology and the continuous improvement of technological level, the cost of ceramic reel bearings has been continuously reduced. It has been applied in a small range of high, precise and sophisticated areas from the past, and has gradually been extended to various industrial fields of the national economy. Mass production has gradually brought the market price closer to practicality and reached a level acceptable to users. Tested in batches and durability in different industries. Many successful cases have realized the advantages of maintenance-free, long life, high stability, and correctness brought by ceramic ceramic reel bearings. Ceramic reel bearings and ceramic balls have gone from research, trial production to mass production, and a wave of large-scale applications has come.

Second,development Status of ceramic reel bearings

The first set of ceramic reel bearings was born in NASA. Since the first set of ceramic reel bearings was successfully developed in 1972, countries around the world have been racing to develop and develop a new generation of higher performance ceramic bearings. The outstanding effect of years of efforts in ceramic bearings is that the service life and extreme speed of the bearing are greatly improved, and basic components are provided for the development of high-speed and ultra-high-speed, high-precision machine tools. In addition, the application in high temperature, corrosion, insulation, vacuum, chemical and other industries has also achieved good results. Today's bearing companies in the world are all developing and producing ceramic reel bearings, and the quality of their products has become an important indicator of their strength. According to incomplete statistics, so far, foreign countries that can produce ceramic reel bearings include more than a dozen countries including the United States, Japan, Germany, France, Russia, South Korea, and the United Kingdom. Among them, the production of ceramic reel bearings started early in foreign countries and has a wide range of applications, such as ceramic ball bearings for CNC machine tools, ceramic reel bearings for electric spindles of grinding machines, and ceramic ball bearings for ball screws of machine tools. The ceramic ball bearing's high wear resistance, self-lubricity, and ultra-high speed have been exerted. It has also contributed to high-precision machine tools, high-speed machine tools, and special environmental equipment. As the core component of ceramic ball bearings --- ceramic spheres, foreign R & D and competition are also fierce. The ceramic balls produced by the Norton company in the United States using the HIP method are internationally rated. At present, the major companies in the world that study ceramic reel bearings are Swedish SKF, Germany's FAG, France's Saint-Gobain, Japan's NSK, KOYO, NMB (Meipaia) and so on.

Third, prospects for the use of ceramic reel bearings

Ceramic reel bearings have many excellent properties, such as: self-lubricating, high temperature resistance, corrosion resistance, anti-magnetic, electrical insulation, etc., have yet to be developed and used in a wider area, and the potential application area is huge. High-quality high-speed ceramic reel bearings: It can serve the domestic machine tool industry very well. The amount of high-speed, high-precision spindles and electric spindle bearings is quite large. It is estimated that the annual demand is more than tens of thousands of sets. However, high-precision machine tool spindle bearings require relatively high machining accuracy and harsh quality. For example, P4 bearings require high-precision ceramic balls of G5 level or higher. At present, there are not many manufacturers in China that can produce products with poor stability. Second: medium quality ceramic reel bearings in petroleum exploration, crude oil smelting, especially fine chemicals, chemical fiber, new energy, printing and dyeing, electroplating industry, sewage treatment, marine development, deep water pump, acid and alkali pump, high temperature, vacuum, nuclear magnetic resonance , Electrical insulation, medicine and health, X-ray tube and food industry can be widely and well used in many fields. Many require only general accuracy grades; medium and low speeds and loads; require bearings to withstand a certain concentration of acid, alkali and salt corrosion; resistance to high temperatures of 300￣400 ° C; non-magnetic, electrical, non-toxic; can be used without oil or use The working medium is self-lubricating, etc .; it can also be used in seawater. Bearings used in these fields account for a very large proportion of special bearings, and ceramic reel bearings are fully capable of replacing and can reach the barely competent and incompetent work of metal bearings. Engineering ceramics has its irreplaceable status. With such a huge market as the premise, we can create a new way in product development and manufacturing to expand the wider application field of ceramic reel bearings. Make new materials, new processes and new technologies better serve production.

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