BEARING DEVICE AND HYDRAULIC MACHINE

• Main Authors: MIKAMI, MAKOTO, OGUMA, TADASHI, KIZAKI, YASUMI, TSUTSUI, MASAJI, NAKAGAWA, NARITOSHI, TAKIMOTO, FUMIO, LONG, THAN TRONG
• Format: Patent
• Language: English; French; German
• Published: 04.03.2015
• Subjects: BEARINGS; BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; METALLURGY; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PRODUCING MECHANICAL POWER; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THERMAL INSULATION IN GENERAL; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

There are provided a water-lubricated bearing device which exhibits excellent bearing performance, has excellent corrosion resistance, can prevent abnormal bearing wear, and is adaptable when an abnormal event of water level decrease occurs, and a hydraulic machine having the bearing device. A bearing device of an embodiment is a bearing device for a hydraulic machine having a rotary shaft of a vertical shaft, and has a water tank storing lubrication water, and a bearing pad supporting from a radial direction a skirt member provided on the rotary shaft in the lubrication water. The bearing device of the embodiment has a first supporting mechanism slidably supporting the bearing pad from the radial direction in the lubrication water, and a second supporting mechanism slidably supporting the bearing pad from a bottom portion side in an axial direction in the lubrication water. One of a supporting surface supporting the bearing pad in the first supporting mechanism and a supported surface supported by the supporting surface in the bearing pad is formed in a convex shape. One of a supporting surface supporting the bearing pad in the second supporting mechanism and a supported surface supported by the supporting surface in the bearing pad is formed in a convex shape.