JP3777440B2 - Gas turbine inspection method and jig used therefor - Google Patents
Gas turbine inspection method and jig used therefor Download PDFInfo
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- JP3777440B2 JP3777440B2 JP2002280160A JP2002280160A JP3777440B2 JP 3777440 B2 JP3777440 B2 JP 3777440B2 JP 2002280160 A JP2002280160 A JP 2002280160A JP 2002280160 A JP2002280160 A JP 2002280160A JP 3777440 B2 JP3777440 B2 JP 3777440B2
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- nozzle support
- gas turbine
- inspection method
- inspection
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Description
【０００１】
【発明の属する技術分野】
本発明はガスタービンの点検方法およびそれに用いる治具に関する。さらに詳しくは、ノズルサポートの点検が簡易になし得るガスタービンの点検方法およびそれに用いる治具に関する。
【０００２】
【従来の技術】
従来より、ガスタービンでは所定時間運転後に開放点検がなされ、その点検において不具合が認められた部品の交換や修理などがなされている。
【０００３】
例えば、高温部開放点検においては、上部メインハウジングおよび上部ノズルサポートを取り外してそれらの点検を行うとともに、タービブレードおよび下部ノズルサポートの点検がなされている。そして、この点検で下部ノズルサポートに装着されているノズルに損傷などの不具合が認められると、上側ケーシングを全て開放するとともに、タービンブレードなどが装着されている主軸を抜き出した後、下部ノズルサポートを抜き出して損傷したノズルなどの交換や補修がなされる。
【０００４】
このため、従来のガスタービンの点検方法では、下部ノズルサポートに不具合が発見されると、点検期間の長期化および点検コストの大幅な上昇を招来するといった問題がある。
【０００５】
【発明が解決しようとする課題】
本発明はかかる従来技術の課題に鑑みなされたものであって、下部ノズルサポートに不具合が発見されても、点検期間の長期化および点検コストの大幅な上昇を招来することなく、その補修などがなし得るガスタービンの点検方法およびそれに用いる治具を提供することを目的としている。
【０００６】
【課題を解決するための手段】
本発明者等はかかる従来技術の課題に対し鋭意研究した結果、下部ノズルサポートは下部メインハウジングに回転可能に保持されているので、適当な方法により下部ノズルサポートを回転させて上側に移動させることにより、前記課題が氷解されることを見出し本発明を完成するに至った。
【０００７】
すなわち、本発明のガスタービンの点検方法は、上部ノズルサポートを取り外す手順と、下部ノズルサポートにダミーノズルサポートを取り付ける手順と、ダミーノズルサポートを半回転させる手順とを含んでいることを特徴とする。
【０００８】
本発明のガスタービンの点検方法においては、タービンロータを半回転させながらダミーノズルサポートを半回転させてもよい。
【０００９】
また、本発明の治具は、ガスタービンの点検方法に用いられる治具であって、外形が上部ノズルサポートの外側部材の外形と同一とされてなることを特徴とする。
【００１０】
【作用】
本発明のガスタービンの点検方法は、前記のごとく構成されているので、下部ノズルサポートに異常が発見されても、ガスタービンの点検期間を長期化させることもなく、またその費用増大も抑制できる。
【００１１】
【発明の実施の形態】
以下、添付図面を参照しながら本発明を実施形態に基づいて説明するが、本発明はかかる実施形態のみに限定されるものではない。
【００１２】
図１に、本発明の一実施形態のガスタービンの点検方法に用いられる治具を概略図で示す。治具Ｊは内側にノズル装着部が設けられていない他は、上部ノズルサポートの外側部材と同一構成とされている。すなわち、治具Ｊの外形は上部ノズルサポートの外側部材の外形と同一とされている。以下、本明細書では、かかる構成とされている治具をダミーノズルサポートと称す。
【００１３】
次に、図２〜図８を参照しながら、前記ダミーノズルサポートＪを用いた発電用ガスタービンＧの高温部の点検方法について説明する。
【００１４】
（１）ケーシングを取り外して燃焼器を取り外した後に、上部メインハウジング１を取り外す（図２参照）。
【００１５】
（２）燃焼器用トランジションダクトを取り外した後に、上部ノズルサポート２を取り外す（図３参照）。
【００１６】
（３）ダミーノズルサポートＪ下面を下部ノズルサポートの上面に当接させた状態で下部ノズルサポートに載置し、ダミーノズルサポートＪを下部ノズルサポートに例えばボルト・ナット留めにて取り付ける（図４参照）。
【００１７】
（４）ダミーノズルサポートＪ側面フランジに設けられているボルト挿通孔（図示省略）を利用して、ダミーノズルサポート回転用部材、例えばＩボルトＩを装着する（図５参照）。なお、ダミーノズルサポート回転用部材をあらかじめダミーノズルサポートＪ側面に取り付けておくことにより、この手順を省略してもよい。
【００１８】
（５）タービンロータＲを半回転させながら、前記ダミーノズルサポート回転用部材を利用してダミーノズルサポートＪを半回転させ、下部ノズルサポートを上部ノズルサポート位置まで移動させる。例えば、ＩボルトＩにチェーンブロックＣのフックを引っ掛けてダミーノズルサポートＪを半回転させる（図６参照）。
【００１９】
（６）下部ノズルサポート３を取り外してその点検・補修をなす（図７参照）。
【００２０】
（７）半回転により上部に移動させられたタービンロータＲ下部の点検・補修をなす（図８参照）。例えば、腐食などが発生しているタービンブレードの交換を行う。
【００２１】
タービンロータＲの点検・補修、上部および下部ノズルサポート２，３の点検・補修などが終了すると、前記手順を逆に辿って復旧作業を行う。
【００２２】
このように、本実施形態によれば、下部ノズルサポート３に異常が発見されてもガスタービンＧ全体を分解する必要がなくなるので、ガスタービンＧの点検期間を長期化させることもなく、またその費用増大も抑制できる。
【００２３】
以上、本発明を実施形態に基づいて説明してきたが、本発明はかかる実施形態のみに限定されるものではなく、各種ガスタービンに適用できる。
【００２４】
【発明の効果】
以上詳述したように、本発明のガスタービンの点検方法によれば、下部ノズルサポートに異常が発見されても、ガスタービンの点検期間を長期化させることもなく、またその費用増大も抑制できるという優れた効果が得られる。
【図面の簡単な説明】
【図１】本発明のガスタービン点検方法に用いられる治具の概略図である。
【図２】本発明のガスタービン点検方法の点検手順を示す説明図であって、同（ａ）はケーシングを取り外した状態を示し、同（ｂ）は上部メインハウジングを取り外した状態を示す。
【図３】本発明のガスタービン点検方法の点検手順を示す説明図であって、同（ａ）は上部ノズルサポートを上方へ移動している状態を示し、同（ｂ）は上部ノズルサポートを取り外した状態を示す。
【図４】本発明のガスタービン点検方法の点検手順を示す説明図であって、ダミーノズルサポートを取り付けた状態を示す。
【図５】本発明のガスタービン点検方法の点検手順を示す説明図であって、ダミーノズルサポート側面にＩボルトを取り付けた状態を示す。
【図６】本発明のガスタービン点検方法の点検手順を示す説明図であって、ダミーノズルサポートをチェーンブロックにより半回転させている状態を示す。
【図７】本発明のガスタービン点検方法の点検手順を示す説明図であって、同（ａ）は下部ノズルサポートを上方へ移動している状態を示し、同（ｂ）は下部ノズルサポートを取り外した状態を示す。
【図８】本発明のガスタービン点検方法の点検手順を示す説明図であって、タービンロータを点検している状態を示す。
【符号の説明】
Ｇ 発電用ガスタービン
Ｊ 治具、ダミーノズルサポート
Ｒ タービンロータ
１ 上部メインハウジング
２ 上部ノズルサポート
３ 下部ノズルサポート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas turbine inspection method and a jig used therefor. More specifically, the present invention relates to a gas turbine inspection method and a jig used therefor, in which the nozzle support can be easily inspected.
[0002]
[Prior art]
Conventionally, in a gas turbine, an open inspection is performed after a predetermined time of operation, and replacement or repair of a part that has been found defective in the inspection has been performed.
[0003]
For example, in the high temperature part opening inspection, the upper main housing and the upper nozzle support are removed and inspected, and the turbine blade and the lower nozzle support are inspected. If the nozzle attached to the lower nozzle support is found to be damaged during this inspection, the upper casing is fully opened and the main shaft on which the turbine blades are attached is removed, and then the lower nozzle support is removed. Replacement or repair of nozzles that have been extracted and damaged is performed.
[0004]
For this reason, in the conventional gas turbine inspection method, if a problem is found in the lower nozzle support, there is a problem that the inspection period is prolonged and the inspection cost is significantly increased.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the problems of the prior art, and even if a defect is found in the lower nozzle support, the repair can be performed without incurring a prolonged inspection period and a significant increase in inspection cost. It is an object of the present invention to provide a gas turbine inspection method and a jig used therefor.
[0006]
[Means for Solving the Problems]
As a result of diligent research on the problems of the prior art, the present inventors have held the lower nozzle support rotatably in the lower main housing, so that the lower nozzle support can be rotated and moved upward by an appropriate method. As a result, the present inventors have found that the above-mentioned problem can be solved by ice and have completed the present invention.
[0007]
That is, the gas turbine inspection method of the present invention includes a procedure of removing the upper nozzle support, a procedure of attaching the dummy nozzle support to the lower nozzle support, and a procedure of rotating the dummy nozzle support halfway. .
[0008]
In the gas turbine inspection method of the present invention, the dummy nozzle support may be half-rotated while the turbine rotor is half-rotated.
[0009]
The jig of the present invention is a jig used in a gas turbine inspection method, and is characterized in that the outer shape is the same as the outer shape of the outer member of the upper nozzle support.
[0010]
[Action]
Since the gas turbine inspection method of the present invention is configured as described above, even if an abnormality is found in the lower nozzle support, the inspection period of the gas turbine is not prolonged, and the cost increase can be suppressed. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, although the present invention is explained based on an embodiment, referring to an accompanying drawing, the present invention is not limited only to this embodiment.
[0012]
In FIG. 1, the jig | tool used for the inspection method of the gas turbine of one Embodiment of this invention is shown with a schematic diagram. The jig J has the same configuration as the outer member of the upper nozzle support except that the nozzle mounting portion is not provided on the inner side. That is, the outer shape of the jig J is the same as the outer shape of the outer member of the upper nozzle support. Hereinafter, in this specification, such a jig is referred to as a dummy nozzle support.
[0013]
Next, an inspection method for a high temperature portion of the power generation gas turbine G using the dummy nozzle support J will be described with reference to FIGS.
[0014]
(1) After removing the casing and the combustor, the upper main housing 1 is removed (see FIG. 2).
[0015]
(2) After removing the combustor transition duct, the
[0016]
(3) The dummy nozzle support J is placed on the lower nozzle support with the lower surface of the dummy nozzle support J in contact with the upper surface of the lower nozzle support, and the dummy nozzle support J is attached to the lower nozzle support with, for example, bolts and nuts (see FIG. 4). ).
[0017]
(4) A dummy nozzle support rotating member, for example, I bolt I is mounted using a bolt insertion hole (not shown) provided in the side flange of the dummy nozzle support J (see FIG. 5). Note that this procedure may be omitted by attaching a dummy nozzle support rotating member to the side of the dummy nozzle support J in advance.
[0018]
(5) While rotating the turbine rotor R halfway, the dummy nozzle support J is rotated halfway using the dummy nozzle support rotating member, and the lower nozzle support is moved to the upper nozzle support position. For example, the dummy nozzle support J is rotated halfway by hooking the hook of the chain block C on the I bolt I (see FIG. 6).
[0019]
(6) Remove the lower nozzle support 3 and inspect and repair it (see FIG. 7).
[0020]
(7) The lower part of the turbine rotor R moved to the upper part by half rotation is inspected and repaired (see FIG. 8). For example, a turbine blade in which corrosion or the like has occurred is replaced.
[0021]
When the inspection / repair of the turbine rotor R and the inspection / repair of the upper and lower nozzle supports 2, 3 are completed, the recovery procedure is performed by reversing the above procedure.
[0022]
Thus, according to the present embodiment, it is not necessary to disassemble the entire gas turbine G even if an abnormality is found in the lower nozzle support 3, so that the inspection period of the gas turbine G is not prolonged, and the Cost increase can also be suppressed.
[0023]
As mentioned above, although this invention has been demonstrated based on embodiment, this invention is not limited only to this embodiment, It can apply to various gas turbines.
[0024]
【The invention's effect】
As described above in detail, according to the gas turbine inspection method of the present invention, even if an abnormality is found in the lower nozzle support, the inspection period of the gas turbine is not prolonged, and the cost increase can be suppressed. An excellent effect is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic view of a jig used in a gas turbine inspection method of the present invention.
FIGS. 2A and 2B are explanatory diagrams showing an inspection procedure of the gas turbine inspection method of the present invention, wherein FIG. 2A shows a state in which a casing is removed, and FIG. 2B shows a state in which an upper main housing is removed.
FIGS. 3A and 3B are explanatory diagrams showing an inspection procedure of the gas turbine inspection method of the present invention, in which FIG. 3A shows a state in which the upper nozzle support is moved upward, and FIG. 3B shows the upper nozzle support; Indicates the removed state.
FIG. 4 is an explanatory view showing an inspection procedure of the gas turbine inspection method of the present invention, showing a state in which a dummy nozzle support is attached.
FIG. 5 is an explanatory diagram showing an inspection procedure of the gas turbine inspection method of the present invention, showing a state in which I bolts are attached to the side surfaces of the dummy nozzle support.
FIG. 6 is an explanatory view showing an inspection procedure of the gas turbine inspection method of the present invention, and shows a state where the dummy nozzle support is half-rotated by the chain block.
FIG. 7 is an explanatory view showing an inspection procedure of the gas turbine inspection method of the present invention, in which FIG. 7 (a) shows a state in which the lower nozzle support is moved upward, and FIG. Indicates the removed state.
FIG. 8 is an explanatory diagram showing an inspection procedure of the gas turbine inspection method of the present invention, and shows a state in which the turbine rotor is being inspected.
[Explanation of symbols]
G Gas turbine J for power generation Jig, dummy nozzle support R Turbine rotor 1 Upper
Claims (3)
下部ノズルサポートにダミーノズルサポートを取り付ける手順と、
ダミーノズルサポートを半回転させる手順
とを含んでいることを特徴とするガスタービンの点検方法。To remove the upper nozzle support,
To attach the dummy nozzle support to the lower nozzle support,
A method for inspecting a gas turbine, comprising: a procedure for half-rotating a dummy nozzle support.
外形が上部ノズルサポートの外側部材の外形と同一とされてなることを特徴とする治具。A jig used in a gas turbine inspection method,
A jig characterized in that the outer shape is the same as the outer shape of the outer member of the upper nozzle support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002280160A JP3777440B2 (en) | 2002-09-26 | 2002-09-26 | Gas turbine inspection method and jig used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002280160A JP3777440B2 (en) | 2002-09-26 | 2002-09-26 | Gas turbine inspection method and jig used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004116379A JP2004116379A (en) | 2004-04-15 |
| JP3777440B2 true JP3777440B2 (en) | 2006-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002280160A Expired - Lifetime JP3777440B2 (en) | 2002-09-26 | 2002-09-26 | Gas turbine inspection method and jig used therefor |
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| Country | Link |
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| JP (1) | JP3777440B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8276273B2 (en) | 2007-10-23 | 2012-10-02 | Mitsubishi Heavy Industries, Ltd. | Method for removing blade ring and member for removing blade ring |
| EP2706198A1 (en) | 2012-09-10 | 2014-03-12 | Alstom Technology Ltd | Method for removing an inner casing from a machine |
| JP6238056B2 (en) | 2013-11-26 | 2017-11-29 | 三菱日立パワーシステムズ株式会社 | Dummy ring assembly for removing a vane segment and a method for removing a vane segment using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10194665A (en) * | 1997-01-08 | 1998-07-28 | Toshiba Corp | Hoisting device |
| JP3716070B2 (en) * | 1997-05-23 | 2005-11-16 | 三菱重工業株式会社 | Turbine upper casing reversal method |
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2002
- 2002-09-26 JP JP2002280160A patent/JP3777440B2/en not_active Expired - Lifetime
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| JP2004116379A (en) | 2004-04-15 |
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