摘要:
A method for repairing a hub pitch gear assembly (115). The method includes providing a ring assembly (137) for adjusting a pitch angle of a wind turbine blade (108) having a plurality of gear teeth (302). A segment of the ring assembly (115) is removed, the segment including at least a portion of at least one gear tooth (115), to form a repair cavity (303). A repair segment (301) configured to mate the repair cavity (303) is provided and the repair segment (301) is directed into the repair cavity (303) and fastened in position. A repaired pitch gear assembly (115) and wind turbine (100) are also disclosed.
摘要:
An extraction apparatus (40) for the removal of a riveted fastener (12) from a structure (10) includes a shaft (42) and a cutting element (62). The cutting element (62) is mechanically coupled to the shaft (42) and is configured to cut a portion of the riveted fastener (12). The shaft (42) and the cutting element (62) are configured for insertion through an inner channel (24) of the riveted fastener (12). A method of replacing the riveted fastener (12) from the structure (10) includes inserting the extraction apparatus (40) through the inner channel (24). The extraction apparatus (40) is rotated. A portion of the riveted fastener (12) that extends through the structure (10) is removed. A head (20) of the riveted fastener (12) is also removed from the structure (10).
摘要:
A method of repairing a crack (14) in a component (12). The method includes preparing a surrounding surface (22) of the crack (14) for repair and welding a first portion (24) of the component (12) on a first side (26) of the crack (14) to a second portion (28) of the component (12) on a second side (30) of the crack (14) to form a fused crack area (50). The method may also include applying a patch (78) over the fused crack area (50) for additional strength.
摘要:
A sandwich structure does not permit the permeation of water and a sandwich structure repairing method is capable of easily repairing the sandwich structure. A sandwich structure (1) includes a core (4) formed of a closed-cell foam plastic material, and surface plates (2, 3) formed of a fiber-reinforced composite material containing hydrophobic inorganic fibers as reinforcing fibers and bonded to the opposite surfaces of the core (4). Water is unable to permeate the sandwich structure. When the outer surface plate (2) of the sandwich structure (1) is damaged, a damaged portion of the outer surface plate (2) is removed to form a circular opening (10) in the outer surface plate (2), a portion of the core (4) in the vicinity of the circular opening (10) is removed by shot blasting work, a support plate (16) provided with radial arms (18) is fastened to the inner surface of the outer surface plate (2) with rivets (25) at a position corresponding to the circular opening (10), a circular cover plate (40) is fitted in the opening (10) so as to be seated on the support plate (16) and is fastened to the support plate (16) with rivets (25). A cavity formed by removing the portion of the core (4) is filled up with a filling material (43).
摘要:
A hinge arm (232) having a hinge pin hole (33) having a worn bore, for example a hinge arm of a hinge assembly of an access door on a gas turbine engine, is repaired by forming in the worn hinge arm (232) a new hole (233) with a keyway (235) extending outwardly from the new hole (235). A keyed bushing (260) is provided having a cylindrical body (262) having a central bore (265) extending axially therethrough and a key (267) extending outwardly from the cylindrical hole body (262). The keyed bushing (260) is inserted into the new hole (233) and keyway (235) formed in the hinge arm (232) thereby preventing rotation of the bushing (260) relative to the hinge arm (232).
摘要:
In a jet pump measurement pipe repair method according to the present embodiment, a breakage part of a measurement pipe(11) horizontally fixed to a lower part of a jet pump provided in reactor water in a reactor pressure vessel is repaired. The method has: a cutting/removing step(S1) of cutting and removing the measurement pipe(11) including the breakage part; a retaining step(S2) of retaining a connection pipe(30,40,45) for connecting the remaining measurement pipe on the jet pump by means of a clamp; and a connecting step(S3) of connecting ends of the remaining measurement pipe by means of the connection pipe(30,40,45).
摘要:
L'invention vise à permettre une réparation rapide et efficace de structures métalliques endommagées, en particulier de peau de fuselage d'aéronef, sans nécessiter de surépaisseur nuisible aux transmissions des ondes. Pour ce faire, elle propose un double plaquage interne/externe constitué par un matériau particulier. Selon un exemple de réalisation, la structure endommagée (2) possédant une face externe (2e) et une face interne (2i), la pièce (20) présente une double plaque interne/externe (21, 22) en extension sensiblement plane, apte à être solidarisée respectivement à la face interne (2i) et à la face externe (2e) de la structure métallique (2), et un noyau central (23) reliant les plaques interne (21) et externe (22). Une rainure (25) est ainsi formée entre ces plaques (21, 22). La pièce est constitué d'un seul bloc en matériau composite et un pli de verre (8), drapé sur la rainure (25), peut être positionné entre les plaques (21, 22) et la structure (2). Le noyau (23) peut être traversé par au moins un orifice (7) apte à laisser passer des liaisons à travers la structure (2).