Assembling method of stator blade ring segment, stator blade ring segment, coupling member, welding method
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0449828
(2008-10-14)
|
등록번호 |
US-8215904
(2012-07-10)
|
우선권정보 |
JP-2007-267667 (2007-10-15) |
국제출원번호 |
PCT/JP2008/068535
(2008-10-14)
|
§371/§102 date |
20091020
(20091020)
|
국제공개번호 |
WO2009/051089
(2009-04-23)
|
발명자
/ 주소 |
- Nakamura, Ikuo
- Waki, Kunihiko
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
A groove 50 formed in each stator ring segment piece 41 is formed to have side wall portions 50b on opposite sides inclined with respect to a bottom 50a so that a width of the groove 50 gradually decreases from an outer peripheral side toward the bottom 50a. A coupling member 42 has a sectional shap
A groove 50 formed in each stator ring segment piece 41 is formed to have side wall portions 50b on opposite sides inclined with respect to a bottom 50a so that a width of the groove 50 gradually decreases from an outer peripheral side toward the bottom 50a. A coupling member 42 has a sectional shape so as to have a maximum width at protrusions 42b at an intermediate portion in a thickness direction. The protrusions 42b on the opposite sides abut against or approach the side wall portions 50b of the groove 50 when the coupling member 42 is placed in the groove 50, a space 100 is formed on the side of the bottom 50a of the groove 50, and a welding groove 200 having a substantially V-shaped section is formed on the side remote from the bottom 50a of the groove 50.
대표청구항
▼
1. An assembling method of a stator blade ring segment, a plurality of which are assembled to form a stator blade ring including a plurality of stator blades provided between an annular inner shroud and outer shroud, comprising the steps of: arranging a plurality of segment pieces each including one
1. An assembling method of a stator blade ring segment, a plurality of which are assembled to form a stator blade ring including a plurality of stator blades provided between an annular inner shroud and outer shroud, comprising the steps of: arranging a plurality of segment pieces each including one of said stator blades provided between an inner shroud portion formed by circumferentially splitting said inner shroud and an outer shroud portion formed by circumferentially splitting said outer shroud; andplacing a band-shaped coupling member in a groove formed in a surface on the side opposite to a side provided with said stator blade in at least either of said inner shroud portion and said outer shroud portion, and welding said coupling member to at least either of said inner shroud portion and said outer shroud portion on opposite sides of said groove to couple said plurality of segment pieces with said coupling member in at least either of the inner shroud portion and the outer shroud portion,wherein said groove is formed to have a side wall portion inclined so that a width of the groove gradually decreases toward a bottom, and said coupling member is formed with protrusions on opposite side surfaces in a width direction, andwhen said coupling member is placed in said groove, a space is formed on the side of said bottom with respect to said protrusion and a welding groove having a substantially V-shaped section is formed on the side opposite to said bottom with respect to said protrusion between the side wall portion of said groove and said side surface of said coupling member, and welding is performed at said welding groove. 2. The assembling method of a stator blade ring segment according to claim 1, wherein in the step of coupling said plurality of segment pieces with said coupling member, a predetermined number of said segment pieces are arranged so that an axial direction of each of said segment pieces is a substantially vertical direction, and said coupling member is placed in the continuous groove of said plurality of segment pieces arranged. 3. The assembling method of a stator blade ring segment according to claim 2, wherein among said plurality of segment pieces arranged, a segment piece at one end is welded to said coupling member and then a segment piece at the other end is welded to said coupling member, and then among said plurality of segment pieces arranged, segment pieces arranged on inner side are successively welded to said coupling member. 4. A stator blade ring segment, a plurality of which are assembled to form a stator blade ring including a plurality of stator blades provided between an annular inner shroud and outer shroud, wherein a plurality of segment pieces are arranged each including one of said stator blades provided between an inner shroud portion formed by circumferentially splitting said inner shroud and an outer shroud portion formed by circumferentially splitting said outer shroud, and said plurality of segment pieces are coupled by welding a band-shaped coupling member placed in a groove formed on the side opposite to a side provided with said stator blade in at least either of said inner shroud portion and said outer shroud portion,said coupling member is formed with protrusions on opposite side surfaces in a width direction so as to have a maximum width at an intermediate portion in a thickness direction,said groove is formed to have a side wall portion inclined so that a width of the groove gradually decreases toward a bottom, andwith said coupling member being placed in said groove, a space is formed on the side of said bottom with respect to said protrusion and a welding groove having a substantially V-shaped section is formed on the side opposite to said bottom with respect to said protrusion between the side wall portion of said groove and said side surface of said coupling member, and at least either of said inner shroud portion and said outer shroud portion is welded to said coupling member at said welding groove. 5. A coupling member for coupling a plurality of segment pieces to form a stator blade ring segment, a plurality of which are assembled to form a stator blade ring including a plurality of stator blades provided between an annular inner shroud and outer shroud, the plurality of segment pieces each including one of said stator blades provided between an inner shroud portion formed by circumferentially splitting said inner shroud and an outer shroud portion formed by circumferentially splitting said outer shroud, said coupling member has a band shape and is formed with protrusions on opposite side surfaces in a width direction so as to have a maximum width at an intermediate portion in a thickness direction, andwhen said coupling member is placed in a groove formed in at least either of said inner shroud portion and said outer shroud portion of said segment piece, a space is formed on the side of the bottom of said groove with respect to said protrusion and a welding groove having a substantially V-shaped section is formed on the side opposite to said bottom with respect to said protrusion between the side wall portion of said groove and said side surface of said coupling member. 6. A method of welding a first member formed with a groove or a recess to a second member placed in said groove or said recess at least at a part of an outer peripheral portion of said second member, wherein said groove or said recess has a side wall portion inclined so that an opening width of the groove or the recess gradually decreases toward a bottom, and said second member is formed with a protrusion on a side surface of the outer peripheral portion so as to have a maximum width at an intermediate portion in a thickness direction,when said second member is placed in said groove or said recess, a space is formed on the side of said bottom with respect to said protrusion and a welding groove having a substantially V-shaped section is formed on the side opposite to said bottom with respect to said protrusion between said side wall portion and the outer peripheral portion of said second member, andsaid welding groove is welded at least at a part of the outer peripheral portion of said second member to weld said first member to said second member.
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