Since the birth of China in the 1970s, slewing bearings have been mainly used for construction machinery. With the growth of China's construction machinery industry, the products and technologies of slewing bearings have been greatly developed. With the improvement of people's cognition level of slewing bearing, its application field and development space are more and more extensive, and it has been widely used in other mechanical equipment manufacturing industries outside the construction machinery industry, and its market scale continues to expand. At present, there are more than 50 manufacturers of slewing bearing products in China, but there are not many manufacturers with large scale and many series of products, and the market share is increasingly concentrated.
The market demand for slewing bearing industry is good. According to preliminary forecast, in 2010, the demand for construction machinery industry will be 208,000 sets; from 2007 to 2010, the total demand for wind power slewing bearings will reach 48,500 sets; the mechanical maintenance market needs slewing bearings every year. 3.96 million sets - 432,000 sets.
In order to expand the share in the high-end market, China's slewing bearings with relatively strong capital and technical strength are constantly increasing their investment in research and development, such as the establishment of more internal standards than the industry standards to ensure the geometric accuracy of slewing bearings. Further increase; increase the depth of hardened layer, improve the service life of slewing bearing; strengthen the research and development of anti-corrosion materials, promote the expansion of slewing bearing application field; develop some test equipment, use computer simulation technology to carry slewing bearing capacity Effective verification of the product structure size optimization; at the same time, these companies have begun to pay attention to the research and application of slewing basic technology and related technologies.
At present, China's slewing bearing products are mainly for the construction machinery industry, and the application in new fields such as wind power generation shows a rapid development momentum. From the perspective of the operating conditions of China's construction machinery industry over the years, the characteristics of periodic fluctuations are obvious, which affects the market supply and demand of slewing bearings. At present, the market demand for slewing bearings has increased significantly, and the slewing bearing industry has developed rapidly.