DEVICE FOR PREVENTING DEFORMATION DUE TO THERMAL EXPANSION OF INNER CYLINDER USED FOR HIGH TEMPERATURE AND HIGH PRESSURE COMBUSTION DEVICE OF MULTI-CYLINDER STRUCTURE

PROBLEM TO BE SOLVED: To produce high temperature and high pressure combustion gas while reducing thermal affect to an inner cylinder and maintaining continuous safe and stable heat generating condition by disposing an inner cylinder so as to be extendable by heat expansion, and cooling the inner cylinder by automatically supplying cooling air when the inner cylinder is extended by a specified length or longer within an elastic deformation limit. SOLUTION: In this device for preventing deformation due to thermal expansion of the inner cylinder used for a high temperature and high pressure combustion device of multi-cylinder structure, the forward end part of the inner cylinder 5 is fixed to the tip part of a combustion cylindrical body 1, and the base end part 5a of the inner cylinder 5 is slidably supported along the inner wall of the mounting part at the innermost position of the combustion cylindrical body 1 so that the inner cylinder can be expanded and extended within a temperature limit not exceeding the elastic variation limit of a metal composition forming the inner tube 5. When the inner tube is extended within an allowable range, a communication hole 25 communicating with a high-pressure air flow hole 11 is allowed to match a through-hole 24 formed in the inner cylinder 5 when the inner tube 5 is extended to allow communication. Air for cooling is led into the inner tube 5 to prevent abnormal high temperature and high pressure from occurring in the inner tube 5 and also prevent a deformation resulting from the thermal extension of the inner cylinder. COPYRIGHT: (C)2004,JPO&NCIPI