Petroleum Machinery Bearings
Hydrodynamic bearings are widely used in submersible electric pump units, centrifugal blowers, high-speed centrifugal compressors, steam turbines, steam turbine generator sets, etc., aiming to achieve longer reliable operation. Liquid hydrodynamic bearings operate mainly in a non-contact manner. When properly designed and maintained, they will theoretically achieve an unlimited service life.
The necessary conditions for hydrodynamic oil film: the two friction pairs must have a certain pressure; the two surfaces must have a certain relative speed so that the large port brings in oil and the small port brings out oil. The two surfaces must be filled with lubricating oil; the two friction pair surfaces must form a wedge shape. Liquid hydrodynamic bearings are divided into radial hydrodynamic bearings and thrust hydrodynamic bearings according to different loads. The radial hydrodynamic bearings have various structures, including three-oil wedge bearings, stepped surface bearings, tilting pad bearings, etc.
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