|  Hydrodynamic & Hydrostatic Pressure Hybrid Journal Bearing is a world-class advanced high-tech product developed in our country since 1980¡¯. It is a kind of new sliding bearing combining the advantages of both hydrodynamic and hydrostatic bearings while overcoming their shortcomings. Using the cascaded structure of cellular type and ring surface throttle and flat chamber throttle, this product allows the pressure oil flowing into the hydraulic fluid chamber to generate enough hydrostatic bearing capacity to make the main bearing suspended among the high pressure oil membranes, as a result of which the abrasion between axis and bearing when the hydrodynamic bearing starts and stops is overcome and improves the service life and the precision retention of the main bearing.
¡°Hydrodynamic & Hydrostatic Pressure Hybrid Journal Bearing and the Functional Parts of Main Axis¡± manufactured by Beijing Beihang Precision Mechanical & Electrical Co., Ltd (formerly Beijing Zhonghang Research and Manufacturing Factory of Equipment) were listed as the key spreading high-tech products in the Ninth Five-Year Plan by the Commission of Science, Technology and Industry for National Defense in 1992; one of the major spreading items in scientific and technological achievements by Beijing Municipal Science & Technology Commission in 1993; one of the key state-level items in scientific & technological achievements to be spread in 1995 by the State Science & Technology Commission in 1994. It also obtained the second award for excellent science and technical achievement of transferring from military to civilian use authorized by Beijing Government in 1994, the second prize of scientific & technological advancement authorized by the former Department of Aeronautics & Astronautics in 1997, the key promotion plan for scientific & technological achievements by Beijing Municipal Science & Technology Commission in 1998 and the state-level scientific & technological new product in 1999 etc.
At present, hydrodynamic & hydrostatic pressure hybrid journal bearings have been used on thousands of equipments from 500 enterprises in 28 provinces, municipalities and autonomous regions, and have created good social and economic benefits.
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