Prospects for the Use Prospects of Ceramic Bearings and Ceramic Ball Bearings
Release time：
2022-03-22 14:58
Source：
Ceramic bearings and ceramic ball bearings have many excellent properties such as: self-lubricating, high temperature resistance, corrosion resistance, anti-magnetic, electrical insulation, etc., yet to be developed and utilized in a wider field, and the potential application fields are huge. High-quality high-speed ceramic ball bearings: can serve the domestic machine tool industry well. The amount of bearings used for high-speed, high-precision spindles and motorized spindles is quite large, and the annual demand is estimated to be 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-level bearings require high-precision ceramic balls above G5 level. At present, there are not many domestic manufacturers that can produce them, and the product stability is also poor. Second: medium-quality ceramic bearings are used in petroleum exploration, crude oil smelting, especially fine chemicals, chemical fibers, new energy, printing and dyeing, electroplating, sewage treatment, marine development, deep water pumps, acid-base pumps, high temperature, vacuum, nuclear magnetic resonance, It can be widely and well used in many fields such as electrical insulation, medicine and health, X-ray tube and food industry. Many only require general accuracy grade; medium and low speed and load; require bearings to be able to withstand a certain concentration of acid, alkali, salt corrosion; high temperature resistance of 300 ~ 400 ° C; non-magnetic, electric, non-toxic; The working medium is self-lubricated, etc.; it can also be used in seawater. Bearings used in these fields account for a large proportion of special bearings, and ceramic bearings and ceramic ball bearings are fully capable of replacing, and can achieve the work that metal bearings are barely competent or unable to perform. Engineering ceramics have its irreplaceable status. With such a huge market as the premise, we can completely create a new way in product development and manufacturing to expand the larger application field of ceramic bearings. Make new materials, new processes and new technologies better serve production.
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The causes of rolling bearing heat and its elimination methods
Bearing precision is low: choose the specified precision grade bearing. Spindle bending or box hole is not centered: repair the spindle or box.
Maintenance and care of bearings
Dismantling of bearings is carried out for regular maintenance and bearing replacement. After disassembly, if the bearings continue to be used, or if it is necessary to check the status of the bearings, the disassembly should be carried out with the same care as when they are installed. Be careful not to damage the bearing parts, especially the disassembly of interference fit bearings, which are difficult to operate.
The number of revolutions or hours that a bearing experiences before pitting occurs under a certain load is called the bearing life.
The main problems faced by China's bearing industry
According to the National Bureau of Statistics data, in 2011 China bearing manufacturing industry scale (annual sales revenue of more than 20 million yuan) a total of 1,416 enterprises, the annual industrial output value of 193.211 billion yuan, an increase of 27.59%; sales revenue of 191.097 billion yuan, an increase of 30.30%; total profit of 12.523 billion yuan, compared with the previous year's growth of 26.54%. It is expected that by 2015, China's bearing production is expected to exceed 28 billion sets, the main business income is expected to reach 210 billion yuan, becoming the world's largest bearing production and sales base.
The origin of the development of bearings
An early form of linear motion bearing was a row of wooden rods placed under a row of skids. Modern linear motion bearings use the same principle of operation, except that sometimes balls are used instead of rollers.
Features of spherical plain bearings
The structure of the spherical plain bearing is simpler than that of the rolling bearing, which is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Joint bearings are generally used for low-speed swinging motion (ie angular motion). Since the sliding surface is spherical, it can also perform tilting motion (ie self-aligning motion) within a certain angle range. When the degree is large, it can still work normally.
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