| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the occurrence of thermal stress produced at the start and the shut-down of a gas turbine, to suppress the low cycle fatigue, to enable a long-term use, and to alleviate the labor of maintenance. <P>SOLUTION: This exhaust duct is an exhaust duct 1 directly connected to the gas turbine and includes a duct plate 2, a reinforcement rib 3 that projects from the outer circumference of the duct plate 2 to the outside in a radial direction and is formed annularly in a circumferential direction, a heat shield plate 10 that covers a part of the inner periphery 2c of the duct plate 2 that overlaps with the reinforcement rib 3 in the radial direction with a space from the inner periphery 2c, and forms a heat shield layer with the duct plate 2, and a projecting wall that projects from the inner periphery 2c of the duct plate 2 to the inside in the radial direction. The heat shield plate 10 is disposed to be adjacent to the projecting wall on the downstream side, and an extension that extends to the duct plate 2 side is formed at the end on the upstream side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
