Manufacturing is currently used in foreign high speed machine tool bearing in addition to the ceramic ball bearing, magnetic suspension bearing, and the use of gas bearing and sliding bearing of dynamic and static pressure liquid, compared with abroad, the high-speed spindle bearings form of our country is a rolling bearing.
Within the limit on the study of sliding bearing of dynamic and static pressure in machine tools high speed, high stiffness, low temperature rise, see a larger gap with foreign research and should be electricity, domestic department spindle axis movement is mainly used for dissolving south processing, transfer surface abroad such as ELKA companies in the United States has the highest static pressure bearing motorized spindle speed 25000 / min, 34 kw power, Germany is not more than r min Hyprostatik male with the highest static pressure bearing motorized spindle speed 42000 / min, 15 kw power.
At the same time, in the aspect of water lubrication machine tool bearings, the domestic is not present in water lubrication bearing spindle unit, but has begun to experimental engineering application abroad, with the oil lubrication bearing has showed better performance than 5.
Petrochemical field basic domestic high-speed bearing market, foreign companies are now, shen shan drum drum fan manufacturers such as most directly imported from abroad, with less developed.
For high-speed bearing research, industry in 2016 is expected to reach 1. 6 billion yuan.
Within countries draws, chong DE, and other enterprises have begun to study, also has obtained certain achievements: shan drum, drum, tepco, shen east steam also successively research in high speed bearing, but the overall domestic high-speed technology lags far behind the application requirements of sliding bearing in addition, in the field of automobile, high-end products are mostly dependent on imports, because import product technical level is higher, the dependence on such products to our country strong, rigid demand in a certain period of time will persist on the whole, compared with the developed countries, the development of high-end sliding bearing industry in China is far behind, sum up the main table now, the following aspects: (1) its self-sufficiency rate of high-end sliding bearing is low;
(2) a large number of the product quality is low, although some high-end products can design and manufacture enough, but the quality is not stable;
(3) materials and manufacturing support capability;
(1) lack of testing technology, the product on test accumulation and abroad still have quite a gap: (5) some special bearing (
Such as military supporting bearing)
'Corporate investment, to high performance, small quantities, great social contribution, enterprise benefit low' characteristics of the obvious: for energy, power, defense and other major engineering provide bearing enterprises lack the corresponding national support policy: (2) for high-end units such as nuclear power units, the purchasing power is big, but relatively insufficient support localization research and development (
3)
The present situation and the analysis of the magnetic suspension bearing industry of our country construction of magnetic suspension bearing technology got started in the 1980 s, after 30 years of development, the basic theory research has reached the international level, but the production and application of technology system is not complete, compared with the developed industrial countries, magnetic levitation bearing industry in China, there is a big gap, mainly reflected in the industrial scale, core technology, management, talent pool,
1)
On the variety, lack of product, not brand awareness.
Has the world's magnetic levitation bearing product specifications have for themselves, now only a few in our country, such as the valley of nanjing university of aeronautics and astronautics and magnetic technology co. , LTD. , cooperative research and development of maglev blower, fly xuan science and technology, the coco instrument of magnetic levitation.
, these products have been successfully applied in sewage, film machine, low radiation glass production line, and other fields, and forcing foreign manufacturers of related products price cut of 40%, but compared with the countries outside the company, from product structure, industrial scale, the company size, market power, magnetic levitation bearing made in China (
2)
On production capacity, the magnetic suspension bearing on international already mass production, the surface magnetic levitation or single axis o industry technology development in our country is not a small batch production, technology, production cycle is long, high production cost
