Regenerative Gas Turbine Combustor

摘要

A regenerative gas turbine combustor is provided that enable to reduce an amount of leakage of compressed air before preheating to compressed air after the preheating.;The regenerative gas turbine combustor is such that a compressed air passage between a combustor inner cylinder 10 and a tail cylinder 12, and a combustor outer cylinder 7 is blocked by a division wall 15 at a position between a bleeding port 13 and an injection port 14, and compressed air is preheated in a regenerator 4 and then the compressed air thus preheated is burnt together with fuel. This combustor includes seal rings 17a-17c, a holder 16 installed on the inner circumferential portion of the division wall 15 and having ring grooves 25a-25c for holding the respective seal rings 17a-17c, and gaps 20 provided between the inner circumferential surfaces of the ring grooves 25a-25c and the outer circumferential surfaces of the seal rings 17a-17c.

主权项

1. A regenerative gas turbine combustor, comprising:
a combustor inner cylinder internally defining a combustion chamber; a tail cylinder connecting the combustor inner cylinder with a turbine; a combustor outer cylinder surrounding the combustor inner cylinder and the tail cylinder; a fuel nozzle for supplying fuel to the combustion chamber; a bleeding port provided in the combustor outer cylinder; a regenerator for preheating, by using the exhaust gas from the turbine, compressed air bled from the bleeding port; an injection port for injecting the compressed air preheated by the regenerator into the inside of the combustor outer cylinder; a division wall for blocking a compressed-air passage located between the combustor inner cylinder and the tail cylinder, and the combustor outer cylinder, at a position between the bleeding port and the injection port; and a sealing mechanism for sealing a clearance between the tail cylinder or the combustor inner cylinder and the division wall; wherein the sealing mechanism includes a seal ring; a holder installed on an inner circumferential portion of the division wall and having a ring groove for holding the seal ring; and a gap provided between an inner circumferential surface of the ring groove and an outer circumferential surface of the seal ring.