Precision bearings are the future development direction of miniature bearings

As automobiles become smaller and more electric, the number of corresponding parts is increasing. Therefore, the automobile-related parts market will continue to expand in the future. The development of automobile bearings will focus on safety, improving efficiency and reducing harmful substances. The oil pump motor and its application system represented by automobile radiator cooling fan motor, wiper motor, exhaust gas recirculation system (EGR) valve frame and anti-lock braking system (ABS) are the main application areas of miniature bearings.

In particular, ABS bearings were only used in high-end cars in the 1980s. Later, they were promoted in the direction of miniaturization and popularization as an important product for safety measures, and their use has been continuously expanded since the mid-1990s. The currently developed automobile main shaft is developing in the direction of multi-function and safety. It not only uses ABS to control the brake discontinuity, but also links with the sensor that monitors the driving situation, and transmits different braking forces to the front, rear, left and right wheels to control safe driving as a whole. Future development trend of miniature bearings This system is an upgraded system of ABS, and different manufacturers have different product names such as ESC, EPS, VSC, etc.

The development of the ABS system is a typical example of the development of automobile-related products. In the future, as the requirements for safety and environmental protection increase, miniature bearings will derive many new application products. The imported bearing market will create new automotive-related products by targeting hybrid vehicles and electric vehicles. In this development, the fields involved in miniature bearings will continue to expand, and their precision will continue to improve. With the continuous development of China's automobile industry, domestic enterprises have huge room for development.

The market scale of my country's household appliance industry has expanded year by year, and the growth rate has declined in the past two years. The Forward-looking Industry Research Institute predicts that the market scale of my country's household appliance industry will continue to expand year by year.

The representative products of miniature bearings for household appliances are vacuum cleaner and air conditioner motor bearings, mainly motors with an outer diameter of 22mm. The characteristic of vacuum cleaners is that the number of revolutions of their motors is as high as 40,000-50,000 revolutions/min, and motors with 100,000 revolutions/min have also been used in vacuum cleaners sold in large quantities on the market. Air conditioners are equipment used indoors for a long time and have high requirements for low noise. The current problem is that the electrical corrosion caused by the power supply between the inner and outer rings of the bearing can only be solved by using non-conductive ceramic balls, which will improve the technical level of miniature bearings for household appliances.

In recent years, the market size of my country's medical device industry has maintained rapid growth. The Forward Industry Research Institute predicts that my country's medical device industry will maintain a growth rate of more than 20%.

In medical devices, the use of bearings also involves many aspects, mainly used for blood pumps for artificial dialysis, drug injection pumps, air pumps for ventilators and other equipment. These devices are used by the pillow of the bed, so low noise treatment must be carried out.

An extreme example is the dental drill used by dentists. The drill rotates 400,000 to 500,000 times per minute, which is difficult for doctors to bear under the stimulation of high pitch. A major issue of medical device bearings is the corrosion resistance of bearings to drugs and acids, which is a topic that cannot be separated from bearing materials.

From the future development trend of bearings in the above application fields, it can be seen that miniature bearings are mainly developing in the direction of precision and bass, so the future development direction is precision bearings. In view of the wide application of precision bearings, the development of various industries has higher and higher requirements for the accuracy, performance, life and reliability of bearings, and the number required is also increasing. However, the domestic production of precision micro bearings is still a weak link. According to relevant statistics, the self-matching rate of precision micro bearings is only 40%. The country has to spend a lot of foreign exchange to import precision micro bearings every year, among which most of the high-speed electric spindle bearings have to rely on imports. In recent years, my country's domestic machine tool industry and automobile industry have developed rapidly. In order to meet the needs of product upgrading and replacement of imports, my country's precision micro bearing products have broad market prospects.