RADIAL-PISTON TYPE HYDRAULIC MACHINE, HYDRAULIC TRANSMISSION AND WIND TURBINE GENERATOR

A radial-piston type hydraulic machine (20) includes at least one piston (24) arranged along a radial direction of the hydraulic machine (20), a roller (26) with a roller surface (27) disposed rotatably on the piston (24), and a rotatable cam (32) having a cam surface (33) disposed facing the roller...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Takeuchi, Hiroaki, Yoshida, Takafumi, Ochiai, Hiroyasu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENTTYPE, e.g. STEAM ENGINES MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS PRODUCING MECHANICAL POWER PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A radial-piston type hydraulic machine (20) includes at least one piston (24) arranged along a radial direction of the hydraulic machine (20), a roller (26) with a roller surface (27) disposed rotatably on the piston (24), and a rotatable cam (32) having a cam surface (33) disposed facing the roller surface (27) across a lubricant oil film. At least one of the roller surface (33) or the cam surface (27) has an isotropic surface roughness or a surface roughness having anisotropy along a direction of a rotational axis (O) of the cam (32). Velocities of the roller surface (27) and the cam surface (33) accompanying rotation of the roller (26) and the cam (32) are set so that a value A is 0 to 1.0. The value A is defined by an equation: A = t / (Ra1 2 + Ra2 2 ) 0.5 . "t" is a thickness of the oil film, Ra1 is a surface roughness of the roller surface (27), and Ra2 is a surface roughness of the cam surface (33).