US 11,953,206 B2
Burner and combustor
Mitsuhiro Karishuku, Yokohama (JP); Satoshi Dodo, Yokohama (JP); Yoshitaka Hirata, Yokohama (JP); Tomohiro Asai, Yokohama (JP); Shohei Yoshida, Yokohama (JP); and Yasuhiro Akiyama, Yokohama (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Sep. 16, 2022, as Appl. No. 17/946,254.
Claims priority of application No. 2021-160273 (JP), filed on Sep. 30, 2021.
Prior Publication US 2023/0167976 A1, Jun. 1, 2023
Int. Cl. F23R 3/34 (2006.01); F02C 7/22 (2006.01); F23D 11/10 (2006.01); F23D 14/02 (2006.01); F23R 3/28 (2006.01)
CPC F23R 3/343 (2013.01) [F02C 7/222 (2013.01); F23D 11/101 (2013.01); F23D 14/02 (2013.01); F23R 3/283 (2013.01); F05D 2220/32 (2013.01); F05D 2240/35 (2013.01); F23R 2900/00001 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A burner of double tube structure comprising:
an outer tube; and
an inner tube, wherein the inner tube includes:
a tip-side support portion fixed on the outer tube,
a base-side support portion fixed on the outer tube,
a main body portion supported by the tip-side support portion,
bellows interposed between the main body portion and the base-side support portion,
a bulkhead member attached at a position between the tip-side support portion and the base-side support portion,
a first gap defined between an outermost peripheral surface of the bellows and an inner peripheral surface of the outer tube, and
a second gap defined between an outer peripheral surface of the bulkhead member and the inner peripheral surface of the outer tube, the second gap being smaller than the first gap,
wherein the outer tube includes:
a main body formed in a circular cylindrical shape,
a flange protruding outwardly in a radial direction from an outer peripheral surface of the main body, and
a fuel port extending outwardly in the radial direction from an outer peripheral surface of the flange,
wherein the burner further comprises:
a fuel header formed between the outer tube and the inner tube,
a plurality of main fuel nozzles connected to the fuel header,
a pilot fuel nozzle extending inside the inner tube, and
a radial fuel flow path formed inside the fuel port and extending in the radial direction, the radial fuel flow path leading to the fuel header from the radially outer side,
wherein an outlet of the radial fuel flow path opens to the fuel header, and the bulkhead member is interposed between the outlet of the radial fuel flow path and the bellows,
the bulkhead member is interposed between the bellows and the plurality of main fuel nozzles, and
the bulkhead member separates a volume in which the bellows are positioned from a volume defined by the outlet of the radial fuel flow path and the fuel header.