GAS TURBINE WORKING MEDIUM SUPPLY PIPE

摘要

PROBLEM TO BE SOLVED: To provide a gas supply pipe capable of reducing a clearance between the gas supply pipe for supplying working medium in a gas turbine stored in a turbine vessel and a turbine inlet nozzle as much as possible when performing rated operation to prevent reduction of plant efficiency and enlarging the clearance as much as possible when performing maintenance to pull out equipment simply. SOLUTION: A sleeve ring 9 and a driving mechanism 8 for sliding the sleeve ring along the gas supply pipe are provided in a tip part of the gas supply pipe 5. The driving mechanism 8 is provided with a passage 10 for introducing working medium from the gas supply pipe 5. A clearance between the gas inlet nozzle 3 and the sleeve ring 9 is enlarged when pressure of working medium introduced by the driving mechanism 8 is low, and the clearance is contracted when the pressure is high. COPYRIGHT: (C)2005,JPO&NCIPI