Piping support of gas turbine steam cooled combustor

• US 6,523,352 B1
• Filed: 07/24/2000
• Issued: 02/25/2003
• Est. Priority Date: 08/02/1999
• Status: Expired due to Term

• Current Assignee: mitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.), Tohoku Electric Power Company Incorporated
• Original Assignee: Mitsubishi Heavy Industries, Ltd., Tohoku Electric Power Company Incorporated
• Inventors: Nishimura, Yoshiaki, Yamada, Noboru, Fujita, Hiroyuki, Iwasaki, Yoichi, Kondo, Haruhiko, Ando, Ikuo, Ogasawara, Hiroyuki, Takahashi, Syuichi, Chiba, Kazunori, Yanou, Koichiro, Takahama, Masayuki
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US09/624,179
• Time in Patent Office: 946 Days
• Field of Search: 60/393.1, 607/96, 607/30, 248/637, 248/49, 248/58, 248/62, 138/108
• US Class Current: 60/796
• CPC Class Codes: F01D 25/12 Cooling
• CPC Class Codes: F01D 9/023 Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings
• CPC Class Codes: F23R 3/002 Wall structures F23R3/02 and F23R3/007 take precedence
• CPC Class Codes: F23R 3/60 Support structures; Attaching or mounting means

Abstract

Piping support of a gas turbine steam cooled combustor is improved such that even when the piping support is damaged by combustion vibration, dropping of the piping support from the piping is prevented, so as to avoid intrusion of fractions of the piping support into turbine portion. An outer fitting member is fixed to a wall surface of a tail tube by welds. A ring is pinched inside the outer fitting member to be fixed by welds. The ring having an inner diameter slightly larger than an outer diameter of steam piping is fitted around the steam piping to be fixed by welds at three places. The steam piping is fixed to the ring, the ring is fixed to the outer fitting member and the outer fitting member is fixed to the tail tube. Thus, the steam piping is supported to the tail tube and even when the welds are detached by combustion vibration, no case of the outer fitting member dropping from the steam piping occurs.

Claims

1. A piping support comprising:

a ring being fitted around and fixed to a steam piping; and

an outer fitting member having a U-shape, wherein an inner curved surface portion of said outer fitting member is in contact with and is fixed to said ring, and ends of said outer fitting member opposite to said inner curved surface portion are fixed by fixing means other than a nut and a bolt to a wall surface of a tail tube as a vibrating member, wherein said ring and the steam piping and said ring and said outer fitting member, respectively, are fixed to each other by welds.

2. A piping support comprising:

a ring being fitted a steam piping so as to be adapted to cope with a thermal elongation in an axial direction of the steam piping; and

an outer fitting member having a U-shape, wherein an inner curved surface portion of said outer fitting member is in contact with and is fixed to said ring via welding, and ends of said outer fitting member opposite to said inner curved surface portion are fixed via welding to a wall surface of a tail tube as a vibrating member.