Mitsubishi Heavy Industries Limited

Kenichi Kawanishi

Takeshi Yamamoto

Hiroshi Shimizu

Hiroyuki Fujiwara

Kazuyuki Hinami

Takashi Ishide

Shuho Tsubota

Takashi Akaba

Yoichi Iwamoto

Tomochika Hamamoto

Hironori Onitsuka

Yukihide Shimazu

Ryuichi Nagase

Masahito Matsubara

Keisuke Sasajima

Kotoyo Mizuno

Yoshihisa Fujiwara

Ikuo Otake

The water jet peening device of the present invention is provided with: a swiveling mechanism for swiveling a spray nozzle in the horizontal direction centered on a positioning member that is positioned at the upper end of an instrumentation tube support; a lift mechanism for raising and lowering the spray nozzle in the vertical direction with respect to the positioning member that is positioned at the upper end of the instrumentation tube support; and a rotation mechanism for supporting the spray nozzle so as to be able to rotate centered on a downward-inclined rotation shaft center on the positioning member end of the vertical direction, disposing a spray port aimed toward the side of the rotation shaft center in a direction that is at a slant from the rotation shaft center, and rotating the spray nozzle centered on the rotation shaft center.

Water jet peening device

According to the present invention, the distance between a spray nozzle and a surface to be constructed is kept constant, and the spray nozzle is moved smoothly to perform water jet peening in a suitable state of construction. A water jet peening device has a spray nozzle () for spraying a water jet, the spray nozzle being capable of moving along a predetermined movement trajectory so that a spray port () of the spray nozzle points upward or downward.

A clearance increasing jig of a heat transfer tube, includes: a jig main body inserted into a clearance between adjacent heat transfer tubes; an inflow hole provided in the jig main body and configured to allow a fluid to flow into the jig main body; and an increasing unit provided in the jig main body and configured to increase the clearance as the fluid flows into the jig main body.

Clearance increasing jig of heat transfer tube and additional installation method of vibration suppression member

Aims are to provide a tubular-body residual-stress improving apparatus and an adjustment method thereof capable of adjusting irradiation position with favorable reproducibility, even when an optical fiber is eccentric. In the tubular-body residual-stress improving apparatus, an optical control unit () includes a rotational hold mechanism () for holding an optical fiber () in a manner that the optical fiber () is rotatable in a circumferential direction of the optical fiber (), and, if a position of an intensity peak of the laser beam from the optical fiber () in an axial direction of the tubular body () is offset from the center of an irradiation profile, a position at which the optical fiber () is held in the circumferential direction is adjusted by the rotational hold mechanism () so as to eliminate the offset or to minimize an influence of the offset.

Apparatus for improving residual stress in tubular body and adjustment method of the same

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Tokyo, Japan

Kenichi Kawanishi