Loading patent…
AssigneeHitachi, Ltd.
InventorsKatsuhiko Hirano, Kunio Enomoto, Eisaku Hayashi, Sadato Shimizu, Ren Morinaka, Tetsuya Ishikawa, Shigeru Tanaka, Noboru Chiba
Estimating the term…
A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.
A water jet peening apparatus comprising a nozzle which is supplied with a high pressure water for producing a jet flow in water, said jet flow containing air bubbles generated by cavitation, and for applying a peening work to a surface of a cylindrical structure which has a large diameter and is disposed in water by injecting said jet flow which contains air bubbles thereto, wherein an angle of a direction of injection of said jet flow is smaller than 45 degrees with respect to a tangent of said cylindrical structure.
A water jet peening apparatus comprising a nozzle which is supplied with a high pressure water for producing a jet flow in water, said jet flow containing air bubbles generated by cavitation, and for applying a peening work to a surface of a cylindrical structure which has a large diameter and is disposed in water by injecting said jet flow which contains air bubbles thereto, wherein an angle of a direction of injection of said jet flow is smaller than 15 degrees with respect to a tangent of said cylindrical structure.
Dependencies are inferred from the claim text.