JP4335407B2 - gas turbine - Google Patents

gas turbine Download PDF

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Publication number
JP4335407B2
JP4335407B2 JP2000117637A JP2000117637A JP4335407B2 JP 4335407 B2 JP4335407 B2 JP 4335407B2 JP 2000117637 A JP2000117637 A JP 2000117637A JP 2000117637 A JP2000117637 A JP 2000117637A JP 4335407 B2 JP4335407 B2 JP 4335407B2
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JP
Japan
Prior art keywords
blade ring
vertical flange
gas turbine
flange portion
outer casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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JP2000117637A
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Japanese (ja)
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JP2001303908A (en
Inventor
泰弘 小代
充 近藤
浩信 箱田
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、ガスタービンに関し、一層詳細には、タービン及び圧縮機の翼環の変形を抑制してチップクリアランスが最小になる局所クリアランスを広げてガスタービンの性能を向上させるようにしたものである。
【0002】
【従来の技術】
図5はガスタービンの代表的なタービン内部を示す断面図であり、100は燃焼器の尾筒出口であり、高温の燃焼ガスが流出する。101はガスパスであり、軸方向には、それぞれ静翼1C,2C,3C,4Cの4段が配設されており、各静翼はそれぞれ外側シュラウドで翼環(翼支持環)102,103,104,105に連結され、円周方向に複数枚が取り付けられている。また、前記静翼1C,2C,3C,4Cとはそれぞれ交互に動翼1S,2S,3S,4Sが配置されており、各動翼はそれぞれロータ106の周囲に複数枚が取り付けられている。
【0003】
そして、前記翼環102,103,104,105は外車室107に対して、翼環102,103,104,105の縦フランジ部102a,103a,104a,105a先端とこれに対応する外車室107の縦フランジ部107a,107b,107c,107d先端との間の凹凸の嵌合部イ,ロ,ハ,ニで支持されている。尚、図示しないが、ガスタービンの圧縮機の翼環構造も上述したタービンの翼環構造と概ね同様に構成されている。
【0004】
【発明が解決しようとする課題】
ところで、前述したような従来の翼環構造にあっては、ガスタービンの運転時には、圧力差によるスラスト力で、例えば前記タービンの凹凸の嵌合部イ,ロ,ハ,ニでは、翼環102,103,104,105の縦フランジ部102a,103a,104a,105a先端の凸部右側面部が外車室107の縦フランジ部107a,107b,107c,107d先端の凹部右側面部に強く押し付けられて両対接面間には摩擦が生じることになる。
【0005】
そのため、外車室107が熱膨張・収縮によりオーバル変形した場合、前記嵌合部イ,ロ,ハ,ニの摩擦により翼環102,103,104,105に外力が働き、翼環102,103,104,105がオーバル変形するという不具合があった。また、一体成形された縦フランジ部102a,103a,104a,105aの熱変形により、オーバル変形する場合もあった。これらは、圧縮機の翼環構造においても同様である。
【0006】
本発明は、前述した状況に鑑みてなされたもので、タービン及び圧縮機の翼環の変形を抑制してロータ側に対するチップクリアランスが最小になる局所クリアランスを広げて性能の向上が図れるガスタービンを提供することを目的とする。
【0007】
【課題を解決するための手段】
斯かる目的を達成するための本発明に係るガスタービンは、タービン及び圧縮機の翼環が外車室に対し凹凸の嵌合部で支持されるガスタービンにおいて、前記翼環外周に縦フランジ部を別体に形成し、該縦フランジ部先端と前記外車室との間に前記嵌合部を設ける一方、該縦フランジ部基端と翼環外周との間にも凹凸の嵌合部を設けると共に、該嵌合部に摩擦係数低減材を介在させたことを特徴とする。
【0012】
また、前記摩擦係数低減材がグラファイト系の固体潤滑塗料からなることを特徴とする。
【0014】
【発明の実施の形態】
以下、本発明に係るガスタービンを実施例により図面を用いて詳細に説明する。
【0015】
[第1実施例]
図1は本発明の第1実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【0016】
図示のように、タービンの翼環1は外車室2に対して、翼環1の縦フランジ部1a先端とこれに対応する外車室2の内周との間の凹凸の嵌合部ホでラジアル方向にはある程度余裕を持って支持されている。(a),(b),(c)は各実施態様を示し、(a)は翼環1外周の縦フランジ部1aの先端に凸部1a−1を設け、これを外車室2内周の縦フランジ部2aの先端に設けた凹部2a−1に嵌合させて前記嵌合部ホを形成している。(b)は外車室2内周の縦フランジ部2aの先端に凸部2a−2を設け、これを翼環1外周の縦フランジ部1aの先端に設けた凹部1a−3に嵌合させて前記嵌合部ホを形成している。(c)は外車室2内周に縦フランジ部を設けることなく、外車室2内周にリング厚み台を形成し、ここに凹部(溝部)2a−3を形成し、翼環1外周の縦フランジ部1aの先端に設けた凸部1a−1を嵌合させて前記嵌合部ホを形成している。
【0017】
そして、ガスタービン運転時における圧力差によるスラスト力で互いに対接することになる前記嵌合部ホの翼環1側の凸部右側面部3と外車室2側の凹部右側面部4((a)及び(c)の場合)及び翼環1側の凹部左側面部6と外車室2側の凸部左側面部5((b)の場合)に摩擦係数低減材が塗布される。
【0018】
前記摩擦係数低減材としは、例えばデフリックコート(商標名)等のグラファイト系の固体潤滑塗料が用いられる。塗布方法としては、脱脂等の下地処理後に常温でスプレー塗装し(10〜15ミクロン程度の膜厚)、乾燥後に300℃で1時間程焼付けする。尚、この焼付けは、タービンの翼環1の場合、運転時に300℃以上の高温雰囲気下に晒されるので、省略しても良い。また、塗布方法としては、スプレーの外にハケ塗りでも良い。
【0019】
このように構成されるため、前記嵌合部ホの対接面3,4及び5,6間の摩擦係数は約0.1〜0.6となり、しかも耐荷重性,耐熱性もあることから、前述したように翼環1に働く外車室2の変形による外力は低減され、翼環1のオーバル変形が抑制される。
【0020】
これにより、翼環1のロータ側に対するチップクリアランスが最小になる局所クリアランスを広げてタービンの性能向上が図れる。
【0021】
尚、上記実施例において、翼環1の縦フランジ部1a先端の凸部右側面部3と外車室2の縦フランジ部2a先端の凹部右側面部4との何れか一方に摩擦係数低減材を塗布しても良い。
【0022】
[第2実施例]
図2は本発明の第2実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【0023】
これは、第1実施例における翼環1の縦フランジ部1aを別体に形成して先端に凸部1a−1、基端に凸部1a−2を有した断面矩形のリング状分割環となっており、当該縦フランジ部1aを翼環1のリング状本体部1bに対して、縦フランジ部1a基端の凸部1a−2とこれに対応するリング状本体部1b外周の凹部1b−1との嵌合部トでラジアル方向にはある程度余裕を持って支持させたものである。
【0024】
これによれば、翼環1(リング状本体部1b)に働く縦フランジ部1aの熱変形による外力が低減され、翼環1(リング状本体部1b)のオーバル変形が抑制されて第1実施例と同様の効果が得られる。
【0025】
尚、上記実施例において、ガスタービン運転時における圧力差によるスラスト力で互いに対接することになる前記嵌合部トの縦フランジ部1a基端の凸部左側面部5とリング状本体部1b外周の凹部左側面部6との少なくともいずれか一方に、第1実施例における摩擦係数低減材を塗布すれば、縦フランジ部1aの変形による翼環1(リング状本体部1b)のオーバル変形がより一層抑制される。
【0026】
[第3実施例]
図3は本発明の第3実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【0027】
これは、第1実施例における翼環1の縦フランジ部1a(図1参照)を無くす一方外車室2の縦フランジ部2aを長く延長形成成して、当該縦フランジ部2aに翼環1のリング状本体部1bを、縦フランジ部2a先端とこれに対応するリング状本体部1b外周との間の凹凸の嵌合部チでラジアル方向にはある程度余裕を持って支持させたものである。
【0028】
これによれば、縦フランジ部1aを無くした分翼環1に作用するスラスト力が低減され、翼環1に働く外車室2の変形による外力は低減され、翼環1のオーバル変形が抑制されて第1実施例と同様の効果が得られる。
【0029】
尚、上記実施例において、ガスタービン運転時における圧力差によるスラスト力で互いに対接することになる前記嵌合部チの縦フランジ部2a先端の凸部左側面部7とリング状本体部1b外周の凹部左側面部8との少なくともいずれか一方に、第1実施例における摩擦係数低減材を塗布すれば、前述したように翼環1に働く外車室2の変形による外力が低減され、翼環1のオーバル変形がより一層抑制される。
【0030】
[第4実施例]
図4は本発明の第4実施例を示すガスタービンの要部断面図である。
【0031】
図4は、ガスタービンの圧縮機における翼環構造を示すもので、第1実施例におけるタービンの翼環構造と同様に、圧縮機の翼環9は外車室10に対して、翼環9の縦フランジ部9a先端とこれに対応する外車室10の縦フランジ部10a先端との間の凹凸の嵌合部リでラジアル方向にはある程度余裕を持って支持されている。
【0032】
そして、ガスタービン運転時における圧力差によるスラスト力で互いに対接することになる前記嵌合部チに、第1実施例と同様に、摩擦係数低減材が塗布される。
【0033】
これによれば、第1実施例と同様に、翼環9に働く外車室10の変形による外力は低減され、翼環9のオーバル変形が抑制されて第1実施例と同様の効果が得られる。
【0034】
尚、上述した圧縮機における翼環構造にも、第2及び第3実施例を適用することができることは言うまでもない。また、本発明は上記各実施例に限定されず、本発明の要旨を逸脱しない範囲で、摩擦係数低減材をスプレー塗装する代わりに摩擦係数低減材製プレートを張り付ける等各種変更が可能であることはいうまでもない。
【0035】
【発明の効果】
以上、実施例に基づいて詳細に説明したように、本発明の請求項1に係る発明は、タービン及び圧縮機の翼環が外車室に対し凹凸の嵌合部で支持されるガスタービンにおいて、前記翼環外周に縦フランジ部を別体に形成し、該縦フランジ部先端と前記外車室との間に前記嵌合部を設ける一方、該縦フランジ部基端と翼環外周との間にも凹凸の嵌合部を設けると共に、該嵌合部に摩擦係数低減材を介在させたことを特徴とするので、翼環に働く縦フランジ部の熱変形による外力が低減され、翼環のオーバル変形が抑制される。
【0040】
本発明の請求項に係る発明は、[請求項1]のガスタービンにおいて、前記摩擦係数低減材がグラファイト系の固体潤滑塗料からなることを特徴とするので、耐熱、耐荷重性が向上すると共に施工が容易である。また、タービンの翼環の場合、運転時に300℃以上の高温雰囲気下に晒されるので、焼付けが省略できる。
【図面の簡単な説明】
【図1】本発明の第1実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【図2】本発明の第2実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【図3】本発明の第3実施例を示すガスタービンの要部断面図で、図5のA部に相当する図である。
【図4】本発明の第4実施例を示すガスタービンの要部断面図である。
【図5】ガスタービンの代表的なタービン内部を示す断面図である。
【符号の説明】
1 翼環
1a 縦フランジ部
1b リング状本体部
2 外車室
2a 縦フランジ部
3 凸部右側面部
4 凹部右側面部
5 凸部左側面部
6 凹部左側面部
7 凸部左側面部
8 凹部左側面部
9 翼環
9a 縦フランジ部
10 外車室
10a 縦フランジ部
ホ 凹凸の嵌合部
ト 凹凸の嵌合部
チ 凹凸の嵌合部
リ 凹凸の嵌合部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas turbine, which was so as to more specifically, to suppress the deformation of the blade ring of the turbine and the compressor to expand the local clearance tip clearance is minimized improve the performance of the gas turbine is there.
[0002]
[Prior art]
FIG. 5 is a cross-sectional view showing the inside of a typical turbine of a gas turbine, and 100 is a tail tube outlet of the combustor, and high-temperature combustion gas flows out. Reference numeral 101 denotes a gas path, in which four stages of stationary blades 1C, 2C, 3C, and 4C are disposed in the axial direction, and each stationary blade is a blade ring (blade support ring) 102, 103, A plurality of pieces are attached in the circumferential direction. Also, the moving blades 1S, 2S, 3S, and 4S are alternately arranged with the stationary blades 1C, 2C, 3C, and 4C, and a plurality of moving blades are attached around the rotor 106, respectively.
[0003]
The blade rings 102, 103, 104, and 105 are connected to the outer casing 107 of the longitudinal flange portions 102 a, 103 a, 104 a, and 105 a of the blade rings 102, 103, 104, and 105 and the corresponding outer casing 107. It is supported by uneven fitting portions A, B, C and D between the vertical flange portions 107a, 107b, 107c and 107d. Although not shown, the blade ring structure of the compressor of the gas turbine is configured in substantially the same manner as the above-described blade ring structure of the turbine.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional blade ring structure as described above, during operation of the gas turbine, the blade ring 102 is used, for example, in the concave and convex fitting portions A, B, C, and D of the turbine by a thrust force due to a pressure difference. , 103, 104, and 105, the right side surface of the convex portion at the tip of the vertical flange portion 102a, 103a, 104a, 105a is strongly pressed against the right side of the concave portion at the tip of the vertical flange portion 107a, 107b, 107c, 107d of the outer casing 107. Friction will occur between the contact surfaces.
[0005]
Therefore, when the outer casing 107 is deformed by oval due to thermal expansion / contraction, external force acts on the blade rings 102, 103, 104, 105 due to the friction of the fitting parts A, B, C, D, and the blade rings 102, 103, There was a problem that 104 and 105 were deformed by oval. In addition, the oval deformation may occur due to thermal deformation of the integrally formed vertical flange portions 102a, 103a, 104a, and 105a. The same applies to the blade ring structure of the compressor.
[0006]
The present invention has been made in view of the circumstances described above, the turbine and deformation of the blade ring by suppressing the gas turbine which can be improved in performance extends the local clearance tip clearance is minimized relative to the rotor side of the compressor The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve such an object, a gas turbine according to the present invention is a gas turbine in which a blade ring of a turbine and a compressor is supported by an uneven fitting portion with respect to an outer casing, and a vertical flange portion is provided on the outer periphery of the blade ring. The fitting portion is formed separately, and the fitting portion is provided between the front end of the vertical flange portion and the outer casing. On the other hand, an uneven fitting portion is also provided between the base end of the vertical flange portion and the outer periphery of the blade ring. The friction coefficient reducing material is interposed in the fitting portion.
[0012]
The friction coefficient reducing material is made of a graphite-based solid lubricant paint.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
It will be described in detail with reference to the drawings by a gas turbine according to the present invention embodiment.
[0015]
[First embodiment]
FIG. 1 is a cross-sectional view of an essential part of a gas turbine showing a first embodiment of the present invention, and corresponds to part A of FIG.
[0016]
As shown in the figure, the turbine blade ring 1 is radial with respect to the outer casing 2 by an uneven fitting portion E between the tip of the longitudinal flange portion 1a of the blade ring 1 and the inner periphery of the outer casing 2 corresponding thereto. It is supported with some margin in the direction. (A), (b), (c) shows each embodiment, (a) is provided with a convex portion 1a-1 at the tip of the vertical flange portion 1a on the outer periphery of the blade ring 1, and this is provided on the inner periphery of the outer casing 2. The fitting portion E is formed by fitting into the recess 2a-1 provided at the tip of the vertical flange portion 2a. (B) is provided with a convex portion 2 a-2 at the tip of the vertical flange portion 2 a on the inner periphery of the outer casing 2, and this is fitted into the concave portion 1 a-3 provided at the tip of the vertical flange portion 1 a on the outer periphery of the blade ring 1. The fitting portion E is formed. (C), without providing a vertical flange portion on the inner periphery of the outer casing 2, a ring thickness base is formed on the inner periphery of the outer casing 2, a recess (groove) 2 a-3 is formed here, and The convex part 1a-1 provided at the front-end | tip of the flange part 1a is made to fit, and the said fitting part e is formed.
[0017]
And the convex right side part 3 on the blade ring 1 side and the concave right side part 4 on the outer casing 2 side of the fitting part E, which are in contact with each other by a thrust force due to a pressure difference during gas turbine operation ((a) and (In the case of (c)) and the concave portion left side surface portion 6 on the blade ring 1 side and the convex portion left side surface portion 5 on the outer casing 2 side (in the case of (b)) are coated with a friction coefficient reducing material.
[0018]
As the friction coefficient reducing material, for example, a graphite-based solid lubricating paint such as Deflick Coat (trade name) is used. As a coating method, after a base treatment such as degreasing, spray coating is performed at room temperature (film thickness of about 10 to 15 microns), and after drying, baking is performed at 300 ° C. for about 1 hour. In the case of the turbine blade ring 1, this baking may be omitted because it is exposed to a high temperature atmosphere of 300 ° C. or higher during operation. As a coating method, brushing may be applied in addition to the spray.
[0019]
Since it is configured in this way, the coefficient of friction between the contact surfaces 3, 4 and 5, 6 of the fitting portion E is about 0.1 to 0.6, and also has load resistance and heat resistance. As described above, the external force due to the deformation of the outer casing 2 acting on the blade ring 1 is reduced, and the oval deformation of the blade ring 1 is suppressed.
[0020]
As a result, the local clearance that minimizes the tip clearance with respect to the rotor side of the blade ring 1 can be widened to improve the performance of the turbine.
[0021]
In the above embodiment, a friction coefficient reducing material is applied to either the convex right side 3 at the tip of the vertical flange 1a of the blade ring 1 or the concave right side 4 at the tip of the vertical flange 2a of the outer casing 2. May be.
[0022]
[Second Embodiment]
FIG. 2 is a cross-sectional view of an essential part of a gas turbine showing a second embodiment of the present invention, and corresponds to part A of FIG.
[0023]
This is a ring-shaped split ring having a rectangular cross section having a vertical flange portion 1a of the blade ring 1 according to the first embodiment and having a convex portion 1a-1 at the tip and a convex portion 1a-2 at the base end. The vertical flange portion 1a is formed with respect to the ring-shaped main body portion 1b of the blade ring 1, and the convex portion 1a-2 at the base end of the vertical flange portion 1a and the corresponding concave portion 1b- on the outer periphery of the ring-shaped main body portion 1b. 1 is supported with some margin in the radial direction.
[0024]
According to this, the external force due to thermal deformation of the vertical flange portion 1a acting on the blade ring 1 (ring-shaped main body portion 1b) is reduced, and the oval deformation of the blade ring 1 (ring-shaped main body portion 1b) is suppressed. The same effect as the example can be obtained.
[0025]
In the above embodiment, the convex left side surface portion 5 of the vertical flange portion 1a base end of the fitting portion and the outer periphery of the ring-shaped main body portion 1b are in contact with each other by a thrust force due to a pressure difference during gas turbine operation. If the friction coefficient reducing material in the first embodiment is applied to at least one of the left side surface portion 6 of the concave portion, the oval deformation of the blade ring 1 (ring-shaped main body portion 1b) due to the deformation of the vertical flange portion 1a is further suppressed. Is done.
[0026]
[Third embodiment]
FIG. 3 is a cross-sectional view of an essential part of a gas turbine showing a third embodiment of the present invention, and corresponds to part A of FIG.
[0027]
This eliminates the vertical flange portion 1a (see FIG. 1) of the blade ring 1 in the first embodiment, while the long flange portion 2a of the outer casing 2 is extended and formed, and the blade ring 1 is formed on the vertical flange portion 2a. The ring-shaped main body portion 1b is supported with a certain degree of margin in the radial direction by a concave and convex fitting portion between the front end of the vertical flange portion 2a and the outer periphery of the corresponding ring-shaped main body portion 1b.
[0028]
According to this, the thrust force acting on the blade ring 1 without the vertical flange portion 1a is reduced, the external force due to the deformation of the outer casing 2 acting on the blade ring 1 is reduced, and the oval deformation of the blade ring 1 is suppressed. Thus, the same effect as in the first embodiment can be obtained.
[0029]
In the above-described embodiment, the convex left side surface portion 7 at the tip of the vertical flange portion 2a of the fitting portion and the concave portion on the outer periphery of the ring-shaped main body portion 1b are in contact with each other by a thrust force due to a pressure difference during gas turbine operation. If the friction coefficient reducing material in the first embodiment is applied to at least one of the left side surface portion 8, the external force due to the deformation of the outer casing 2 acting on the blade ring 1 is reduced as described above, and the oval of the blade ring 1 is reduced. Deformation is further suppressed.
[0030]
[Fourth embodiment]
FIG. 4 is a cross-sectional view of an essential part of a gas turbine showing a fourth embodiment of the present invention.
[0031]
FIG. 4 shows a blade ring structure in a compressor of a gas turbine. Like the blade ring structure of the turbine in the first embodiment, the blade ring 9 of the compressor is in relation to the outer casing 10 with respect to the blade ring 9. A concave and convex fitting portion between the front end of the vertical flange portion 9a and the front end of the corresponding vertical flange portion 10a of the outer casing 10 is supported with some margin in the radial direction.
[0032]
Then, the friction coefficient reducing material is applied to the fitting parts that are in contact with each other by the thrust force due to the pressure difference during the operation of the gas turbine, as in the first embodiment.
[0033]
According to this, as in the first embodiment, the external force due to the deformation of the outer casing 10 acting on the blade ring 9 is reduced, the oval deformation of the blade ring 9 is suppressed, and the same effect as in the first embodiment is obtained. .
[0034]
Needless to say, the second and third embodiments can also be applied to the blade ring structure in the compressor described above. Further, the present invention is not limited to the above embodiments, and various modifications such as attaching a friction coefficient reducing material plate instead of spray coating the friction coefficient reducing material are possible without departing from the gist of the present invention. Needless to say.
[0035]
【The invention's effect】
As described above in detail based on the embodiments, the invention according to claim 1 of the present invention is a gas turbine in which the blade ring of the turbine and the compressor is supported by the concave and convex fitting portions with respect to the outer casing. A vertical flange portion is formed separately on the outer periphery of the blade ring, and the fitting portion is provided between the front end of the vertical flange portion and the outer casing, while between the base end of the vertical flange portion and the outer periphery of the blade ring. Is provided with a concave and convex fitting part, and a friction coefficient reducing material is interposed in the fitting part, so that external force due to thermal deformation of the vertical flange part acting on the blade ring is reduced, and the blade ring oval is reduced. Deformation is suppressed.
[0040]
The invention according to claim 2 of the present invention is characterized in that, in the gas turbine according to claim 1, the friction coefficient reducing material is made of a graphite-based solid lubricating paint, so that heat resistance and load resistance are improved. And construction is easy. Further, in the case of a turbine blade ring, since it is exposed to a high temperature atmosphere of 300 ° C. or higher during operation, baking can be omitted.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a gas turbine showing a first embodiment of the present invention, corresponding to part A in FIG.
FIG. 2 is a cross-sectional view of a main part of a gas turbine showing a second embodiment of the present invention, corresponding to part A in FIG.
FIG. 3 is a cross-sectional view of an essential part of a gas turbine showing a third embodiment of the present invention, corresponding to part A in FIG. 5;
FIG. 4 is a cross-sectional view of a main part of a gas turbine showing a fourth embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a typical turbine interior of a gas turbine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Blade ring 1a Vertical flange part 1b Ring-shaped main-body part 2 Outer casing 2a Vertical flange part 3 Convex part right side part 4 Concave part right side part 5 Convex part left side part 6 Concave part left side part 7 Convex part left side part 8 Concave part left side part 9 Wing ring 9a Vertical flange portion 10 Outer casing 10a Vertical flange portion E Concavity and convexity fitting portion G Concavity and convexity fitting portion h Concavity and convexity fitting portion Relief and concavity fitting portion

Claims (2)

タービン及び圧縮機の翼環が外車室に対し凹凸の嵌合部で支持されるガスタービンにおいて、前記翼環外周に縦フランジ部を別体に形成し、該縦フランジ部先端と前記外車室との間に前記嵌合部を設ける一方、該縦フランジ部基端と翼環外周との間にも凹凸の嵌合部を設けると共に、該嵌合部に摩擦係数低減材を介在させたことを特徴とするガスタービン。In a gas turbine in which a blade ring of a turbine and a compressor is supported by an uneven fitting portion with respect to an outer casing, a vertical flange portion is formed separately on the outer periphery of the blade ring, and the front end of the vertical flange portion, the outer casing, The fitting portion is provided between the vertical flange portion proximal end and the outer periphery of the blade ring, and an uneven fitting portion is provided between the flange portion and the friction coefficient reducing material. A characteristic gas turbine. 前記摩擦係数低減材がグラファイト系の固体潤滑塗料からなることを特徴とする請求項1記載のガスタービン。The gas turbine according to claim 1, wherein the friction coefficient reducing material is made of a graphite-based solid lubricating paint .
JP2000117637A 2000-04-19 2000-04-19 gas turbine Expired - Lifetime JP4335407B2 (en)

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JP4335407B2 true JP4335407B2 (en) 2009-09-30

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