JP2001317577A - Ceramic spring and elestically supporting structure using same - Google Patents
Ceramic spring and elestically supporting structure using sameInfo
- Publication number
- JP2001317577A JP2001317577A JP2000138552A JP2000138552A JP2001317577A JP 2001317577 A JP2001317577 A JP 2001317577A JP 2000138552 A JP2000138552 A JP 2000138552A JP 2000138552 A JP2000138552 A JP 2000138552A JP 2001317577 A JP2001317577 A JP 2001317577A
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- Japan
- Prior art keywords
- ceramic
- spring
- members
- curved
- ceramic spring
- 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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- Gasket Seals (AREA)
- Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、湾曲した板状のセ
ラミックばねとこれを用いた弾性支持構造に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved plate-shaped ceramic spring and an elastic support structure using the same.
【０００２】[0002]
【従来の技術】例えば、ガスタービンでは、圧縮機から
の圧縮空気が、燃焼器内で燃料と混合されて燃焼し、そ
の高温高圧の燃焼ガスがタービンに送られるが、前記燃
焼器が周方向に並んで複数個配置されている場合、各燃
焼器の燃焼筒の下流端部は円弧状に形成され、全燃焼器
の燃焼筒の下流端部を周方向に並べて円筒を形成し、タ
ービンの円筒状のノズルに対応するようにされる。2. Description of the Related Art In a gas turbine, for example, compressed air from a compressor is mixed with fuel in a combustor and burns, and high-temperature and high-pressure combustion gas is sent to the turbine. When a plurality of combustors are arranged side by side, the downstream end of the combustion cylinder of each combustor is formed in an arc shape, and the downstream ends of the combustion cylinders of all the combustors are arranged in a circumferential direction to form a cylinder. It is made to correspond to a cylindrical nozzle.
【０００３】前記燃焼筒を耐熱性向上のためにセラミッ
ク製とした場合、その下流端部の外周側および内周側に
は、リング状のセラミック製シール部材が配置され、こ
れらシール部材とその内外周の金属製ハウジングとの間
には、耐熱性に優れる例えばセラミック製の平板状の板
ばねが介在されて、燃焼筒の下流端部およびシール部材
が径方向に相対移動自在に支持されている。その板ばね
のばね力により、シール部材が燃焼筒の下流端部の外周
面および内周面に押し当てられて、燃焼筒の下流端部の
内外周のシールが図られる。When the combustion cylinder is made of ceramic for improving heat resistance, ring-shaped ceramic sealing members are arranged on the outer peripheral side and inner peripheral side of the downstream end thereof, and these sealing members and their inner and outer parts are arranged. A flat plate spring made of, for example, ceramic, which is excellent in heat resistance, is interposed between the peripheral metal housing and the downstream end of the combustion cylinder and the seal member are supported so as to be relatively movable in the radial direction. . Due to the spring force of the leaf spring, the seal member is pressed against the outer peripheral surface and the inner peripheral surface at the downstream end of the combustion cylinder, thereby sealing the inner and outer periphery of the downstream end of the combustion cylinder.
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記したよう
に、リング状のシール部材の内外周と、その内外周のハ
ウジングとの間に平板状の板ばねもしくはコイルばね
等、既存ばねを介在させるのでは、ハウジングとシール
部材との間の径方向スペースを大きく取る必要があり、
それだけガスタービンが大型化することになる。However, as described above, an existing spring such as a flat plate spring or a coil spring is interposed between the inner and outer circumferences of the ring-shaped sealing member and the housing on the inner and outer circumferences. In, it is necessary to take a large radial space between the housing and the sealing member,
As a result, the size of the gas turbine increases.
【０００５】本発明は、以上の事情に鑑みてなされたも
ので、弯曲した内周側の部材と弯曲した外周側の部材と
の間に、その両部材間のスペースを大きく取ることなく
介在させることができ、前記両部材の一方を他方に対し
て径方向に相対移動可能に支持するセラミックばねとこ
れを用いた弾性支持構造を提供することを目的とする。The present invention has been made in view of the above circumstances, and is interposed between a curved inner peripheral member and a curved outer peripheral member without taking a large space between the two members. It is an object of the present invention to provide a ceramic spring that supports one of the two members so as to be relatively movable in the radial direction with respect to the other, and an elastic support structure using the same.
【０００６】[0006]
【課題を解決するための手段】前記した目的を達成する
ために、本発明に係るセラミックばねは、セラミック材
料からなり、弯曲した細長い板状に形成されている。こ
の構成によれば、弯曲した内周側の部材の外面と弯曲し
た外周側の部材の内面との間に介在させることにより、
両部材間の径方向スペースを大きく取ることなく、その
セラミックばねのばね力で両部材の一方を他方に対して
径方向に相対移動可能に支持することができる。In order to achieve the above-mentioned object, a ceramic spring according to the present invention is made of a ceramic material and is formed in a curved and elongated plate shape. According to this configuration, by being interposed between the outer surface of the curved inner peripheral member and the inner surface of the curved outer peripheral member,
One of the two members can be supported by the spring force of the ceramic spring so as to be relatively movable in the radial direction without taking a large radial space between the two members.
【０００７】前記構成において、セラミックばねは円弧
状に弯曲しているものが好ましい。この構成によれば、
セラミックばねが単純な円弧状であるから、製造が容易
である。また、曲率半径を異ならせることにより、ばね
定数を容易に変更できる。In the above configuration, the ceramic spring is preferably curved in an arc shape. According to this configuration,
Since the ceramic spring has a simple arc shape, manufacture is easy. Further, by changing the radius of curvature, the spring constant can be easily changed.
【０００８】本発明に係る弾性支持構造は、第１の部材
の弯曲した外面と第２の部材の弯曲した内面との間に、
前記構成のセラミックばねが介在し、前記セラミックば
ねのばね力により、前記両部材の一方が他方に対して径
方向に相対移動可能に支持されており、前記セラミック
ばねは、その長手方向両端部で第１の部材に接触し、中
央部で第２の部材に接触している。この構成によれば、
両部材間のスペースを大きく取ることなく、そのセラミ
ックばねのばね力で、両部材の一方を他方に対して径方
向に相対移動可能に支持することができる。[0008] The elastic support structure according to the present invention is provided between the curved outer surface of the first member and the curved inner surface of the second member.
The ceramic spring having the above configuration is interposed, and one of the two members is supported so as to be relatively movable in the radial direction with respect to the other by the spring force of the ceramic spring. It is in contact with the first member and in contact with the second member at the center. According to this configuration,
One of the two members can be supported so as to be relatively movable in the radial direction with respect to the other by the spring force of the ceramic spring without taking a large space between the two members.
【０００９】前記構成の弾性支持構造において、好まし
くは、前記第１の部材の外面および第２の部材の内面は
円弧状または円周状であり、前記セラミックばねは円弧
状に形成されて、自然状態でその曲率半径が、前記第１
の部材の外面および第２の部材の内面の各曲率半径より
も小さく設定されている。この構成によれば、単純な円
弧状のセラミックばねを用いて、両部材間のスペースを
より小さくしながら、そのセラミックばねのばね力で両
部材の一方を他方に対して径方向に相対移動可能に支持
することができる。In the elastic support structure having the above-mentioned structure, preferably, the outer surface of the first member and the inner surface of the second member are arc-shaped or circumferential, and the ceramic spring is formed in an arc-shaped, In this state, the radius of curvature is the first
Are set smaller than the respective radii of curvature of the outer surface of the member and the inner surface of the second member. According to this configuration, it is possible to relatively move one of the two members in the radial direction with the spring force of the ceramic spring while using a simple arc-shaped ceramic spring to reduce the space between the two members. Can be supported.
【００１０】[0010]
【発明の実施の形態】以下、本発明の好適な実施形態に
ついて図面を参照しながら説明する。図１は本発明の一
実施形態に係るセラミックばねを用いたガスタービンを
示す一部破断した側面図である。同図において、ガスタ
ービン１は、圧縮機２で空気ＩＡを圧縮して燃焼器３に
導くとともに、ガスまたは液体燃料Ｆを、燃焼器３内に
噴射して燃焼させ、その高温高圧の燃焼ガスのエネルギ
によりタービン４を駆動する構成になっている。このタ
ービン４は圧縮機２を駆動するとともに、例えば発電機
（図示せず）のような負荷を駆動する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing a gas turbine using a ceramic spring according to one embodiment of the present invention. In FIG. 1, a gas turbine 1 compresses air IA with a compressor 2 and guides the compressed air IA to a combustor 3, injects gas or liquid fuel F into the combustor 3 to burn the gas IA. The turbine 4 is driven by this energy. The turbine 4 drives the compressor 2 and also drives a load such as a generator (not shown).
【００１１】前記圧縮機２として、軸流圧縮機を備えた
ガスタービン１を例示してある。この軸流圧縮機２は、
回転軸１２の外周面に配置された多数個の動翼１３と、
ハウジング１４の内周面に複数段に配置された静翼１５
との組合せにより、吸気ダクト１６から吸入した空気Ｉ
Ａを圧縮して、その圧縮空気Ａを環状に形成された車室
１７に送給する。As the compressor 2, a gas turbine 1 having an axial compressor is illustrated. This axial compressor 2
A number of moving blades 13 arranged on the outer peripheral surface of the rotating shaft 12;
Stator blades 15 arranged in a plurality of stages on the inner peripheral surface of housing 14
And the air I sucked from the intake duct 16
A is compressed, and the compressed air A is sent to the vehicle compartment 17 formed in an annular shape.
【００１２】燃焼器３は、環状の車室１７に、その周方
向に沿って複数個（例えば６個）が等間隔で配置されて
おり、車室１７に送給された圧縮空気Ａが、矢印ａ，ｂ
で示すように、燃焼筒２１内の燃焼室２２に導入され
る。一方、燃焼器３の燃料ノズル２３から燃料Ｆが燃焼
室２２内に噴射され、この燃料Ｆが圧縮空気Ａと混合さ
れて燃焼し、その高温高圧の燃焼ガスＧが、燃焼筒２１
の下流側（燃焼ガスＧの流れ方向の下流側）に接続され
た遷移ダクト２６を通って、タービン４に流入する。A plurality (for example, six) of the combustors 3 are arranged in the annular casing 17 at equal intervals along the circumferential direction, and the compressed air A supplied to the casing 17 is Arrows a, b
As shown in the figure, the gas is introduced into the combustion chamber 22 in the combustion cylinder 21. On the other hand, fuel F is injected into the combustion chamber 22 from the fuel nozzle 23 of the combustor 3, and the fuel F is mixed with the compressed air A and burned.
Flows into the turbine 4 through a transition duct 26 connected to the downstream side (downstream side in the flow direction of the combustion gas G).
【００１３】図２は、ガスタービン１の下半部に位置す
る燃焼器３の要部を拡大した縦断面図を示す。同図にお
いて、ガスタービン１の軸心Ｃは燃焼器３の上方に位置
している。前記燃焼筒２１および遷移ダクト２６はとも
に、セラミック製である。FIG. 2 is an enlarged longitudinal sectional view of a main part of the combustor 3 located in the lower half of the gas turbine 1. In the figure, the axis C of the gas turbine 1 is located above the combustor 3. The combustion cylinder 21 and the transition duct 26 are both made of ceramic.
【００１４】遷移ダクト２６の上流端部は、ベース部４
１ａが金属製ハウジング１４にボルト連結されたサポー
ト部材４１を介して、金属製ハウジング１４に支持され
ている。このサポート部材４１は、遷移ダクト２６の外
面の大部分を覆う筒状の金属製部材であって、遷移ダク
ト２６の上流部に近接したフランジ状の連結部４１ｂ
に、コイルスプリング４２および金属製リング部材４３
を介して遷移ダクト２６の上流端部が連結されている。
遷移ダクト２６の外周面には環状の突条４７が設けられ
るとともに、サポート部材４１の内周面には前記突条４
７を受け止める環状の突条４８が設けられ、これにより
遷移ダクト２６の下流側への移動が制限される。The upstream end of the transition duct 26 is
1 a is supported by the metal housing 14 via a support member 41 bolted to the metal housing 14. The support member 41 is a cylindrical metal member that covers most of the outer surface of the transition duct 26, and has a flange-like connecting portion 41 b that is close to the upstream portion of the transition duct 26.
A coil spring 42 and a metal ring member 43
The upstream end of the transition duct 26 is connected via the.
An annular ridge 47 is provided on the outer peripheral surface of the transition duct 26, and the ridge 4 is provided on the inner peripheral surface of the support member 41.
An annular ridge 48 is provided to receive the transition duct 7, thereby restricting the transition duct 26 from moving downstream.
【００１５】各遷移ダクト２６の下流端部２６ａは、タ
ービン４の第１段ノズル５３の上流側に対向しており、
図３（Ａ）に背面図で示すように、前記ノズル５３の一
部周域に対応するように、円弧状に形成されている。こ
こでは、燃焼器３が６個の場合を示しており、遷移ダク
ト２６の下流端部２６ａは、タービン４の第１段ノズル
５３の１／６の周域に対応させてある。その遷移ダクト
２６の下流端部２６ａの内周面は、図２に示すセラミッ
ク製のシールリング４９およびセラミックばね５０を介
してハウジング１４側の金属製ばね受け部材６５に支持
されている。遷移ダクト２６の下流端部２６ａの外周面
も、セラミック製のシールリング６９およびセラミック
ばね７０を介してハウジング１４側の金属製ばね受け部
材６６に支持されている。また、遷移ダクト２６の下流
端部２６ａの内周側に対応する前記ばね受け部材６５
は、タービン軸心Ｃの回りにリング状に形成され、ハウ
ジング１４に固定されている。遷移ダクト２６の下流端
部２６ａの外周側に対応する前記ばね受け部材６６も、
タービン軸心回りに円弧状またはリング状に形成され、
ハウジング１４に固定されている。The downstream end 26 a of each transition duct 26 faces the upstream side of the first stage nozzle 53 of the turbine 4,
As shown in a rear view of FIG. Here, the case where the number of the combustors 3 is six is shown, and the downstream end portion 26 a of the transition duct 26 corresponds to the 1/6 peripheral area of the first stage nozzle 53 of the turbine 4. The inner peripheral surface of the downstream end 26a of the transition duct 26 is supported by a metal spring receiving member 65 on the housing 14 side via a ceramic seal ring 49 and a ceramic spring 50 shown in FIG. The outer peripheral surface of the downstream end 26a of the transition duct 26 is also supported by a metal spring receiving member 66 on the housing 14 side via a ceramic seal ring 69 and a ceramic spring 70. Further, the spring receiving member 65 corresponding to the inner peripheral side of the downstream end 26a of the transition duct 26
Are formed in a ring shape around the turbine axis C and are fixed to the housing 14. The spring receiving member 66 corresponding to the outer peripheral side of the downstream end 26a of the transition duct 26 is also provided.
It is formed in an arc shape or a ring shape around the turbine axis,
It is fixed to the housing 14.
【００１６】セラミックばね５０，７０のセラミック部
材としては、例えば炭化珪素（ＳｉＣ）、酸化アルミニ
ウム（Ａｌ2 Ｏ3 ）、酸化ジルコニウム（ＺｒＯ2 ）、
窒化珪素（Ｓｉ3 Ｎ4 ）等を用いることができる。特
に、強度と靱性を兼ね備えている点で窒素珪素が好まし
い。例えば窒素珪素に、シリカ（ＳｉＯ2 ）、酸化アル
ミニウム（Ａｌ2 Ｏ3 ）および酸化マグネシウム（Ｍｇ
Ｏ）のうち少なくとも１種と希土類酸化物とを焼結助剤
として添加し、成形後に１６００〜２０００℃で焼成し
てなる、次の特性を備えた窒素珪素セラミックが好まし
い。相対密度が９５％以上、特に９８％以上、さらに９
９％以上。ＪＩＳ Ｒ１６０１による４点曲げ試験によ
る室温強度が５００ＭＰａ以上、特に６００ＭＰａ以上
で、かつ１０００℃での強度が２００ＭＰａ以上、特に
３００ＭＰａ以上、さらに４００ＭＰａ以上。ＪＩＳ
Ｒ １６０７のＩＦ法（圧子圧入法）による破壊靱性
（Ｋ1C）が５ＭＰａ・ｍ1/2 以上、特に５．５ＭＰａ・
ｍ1/2 以上。The ceramic members of the ceramic springs 50 and 70 include, for example, silicon carbide (SiC), aluminum oxide (Al 2 O 3 ), zirconium oxide (ZrO 2 ),
Silicon nitride (Si 3 N 4 ) or the like can be used. In particular, nitrogen silicon is preferred because it has both strength and toughness. For example, silicon (SiO 2 ), aluminum oxide (Al 2 O 3 ) and magnesium oxide (Mg
O) and a rare earth oxide are added as sintering aids, and after molding, they are fired at 1600 to 2000 ° C., and are preferably nitrogen silicon ceramics having the following characteristics. The relative density is 95% or more, especially 98% or more, and 9
9% or more. The room temperature strength by a four-point bending test according to JIS R1601 is 500 MPa or more, particularly 600 MPa or more, and the strength at 1000 ° C. is 200 MPa or more, particularly 300 MPa or more, and further 400 MPa or more. JIS
R 1607 having a fracture toughness (K 1C ) of 5 MPa · m 1/2 or more, particularly 5.5 MPa ·
m 1/2 or more.
【００１７】シールリング４９，６９は、図４に斜線を
施して示すように、ガスタービンの軸心Ｃの回りに並ん
で配置されて、周方向６に分割された複数の円弧状のセ
ラミック製リング片４９ａ，６９ａからなり、ばね受け
部材６５は周方向に２分割された円弧状のばね受け半体
６５ａからなる。As shown by hatching in FIG. 4, the seal rings 49 and 69 are arranged side by side around the axis C of the gas turbine, and are made of a plurality of arc-shaped ceramics divided in the circumferential direction 6. The spring receiving member 65 is composed of ring pieces 49a and 69a, and an arc-shaped spring receiving half 65a that is divided into two in the circumferential direction.
【００１８】内周側のセラミックばね５０は、円弧状に
弯曲した細長い板状に形成されて、自然状態でその曲率
半径が、内周側のシールリング４９の円周状の内面４９
０およびこのシールリング４９に対応するばね受け部材
６５の円周状の外面６５１の各曲率半径よりも小さく設
定されたセラミック部材からなり、その長手方向両端部
の内面でばね受け部材６５の外面６５１に接触し、中央
部の外面で内周側のシールリング４９の内面４９０に接
触している。この場合、セラミックばね５０の形状にお
ける「細長い板状」とは、縦横比が３以上で、通常は５
０以下の板状のものを言う。後述する他のセラミックば
ね６０，７０についても同様である。このセラミックば
ね５０のばね力により、リング状に弯曲した内周側の第
１の部材であるばね受け部材６５に対して、リング状に
弯曲した外周側の第２の部材であるシールリング４９が
径方向に相対移動可能に支持されている。The inner peripheral side ceramic spring 50 is formed in an elongated plate shape curved in an arc shape, and its radius of curvature in a natural state is equal to the inner peripheral surface 49 of the inner peripheral side seal ring 49.
0 and a ceramic member set to be smaller than each radius of curvature of the circumferential outer surface 651 of the spring receiving member 65 corresponding to the seal ring 49, and the inner surface at both ends in the longitudinal direction of the outer surface 651 of the spring receiving member 65. , And the outer surface of the central portion is in contact with the inner surface 490 of the seal ring 49 on the inner peripheral side. In this case, the “elongated plate shape” in the shape of the ceramic spring 50 means that the aspect ratio is 3 or more, and usually 5 or more.
It refers to a plate-like thing of 0 or less. The same applies to other ceramic springs 60 and 70 described later. Due to the spring force of the ceramic spring 50, the seal ring 49, which is a second member on the outer peripheral side, which is curved in a ring shape, is opposed to the spring receiving member 65, which is a first member on the inner peripheral side, which is curved in a ring shape. It is supported so as to be relatively movable in the radial direction.
【００１９】このような支持構造により、内周側の第１
の部材であるばね受け部材６５と、外周側の第２の部材
であるシールリング４９との間に、両部材間のスペース
を大きくすることなくセラミックばね５０を介在させる
ことができる。With such a support structure, the inner first side
The ceramic spring 50 can be interposed between the spring receiving member 65 as the member and the seal ring 49 as the outer peripheral second member without increasing the space between both members.
【００２０】また、外周側のセラミックばね７０も円弧
状に弯曲した細長い板状に形成されて、自然状態でその
曲率半径が、外周側のシールリング６９の円周状の外面
６９１およびこのシールリング６９に対応するばね受け
部材６６の円周状の内面６６０の各曲率半径よりも小さ
く設定されたセラミック部材からなり、その長手方向両
端部の内面でシールリング６９の外面６９１に接触し、
中央部でばね受け部材６６の内面６６０に接触してい
る。このセラミックばね７０のばね力により、リング状
に弯曲した内周側の第１の部材であるシールリング６９
が、リング状に弯曲した外周側の第２の部材であるばね
受け部材６６に対して径方向に相対移動可能に支持され
ている。ばね受け部材６６およびシールリング６９は周
方向に６分割されている。The ceramic spring 70 on the outer peripheral side is also formed in an elongated plate shape curved in an arc shape, and its radius of curvature in its natural state is the outer peripheral surface 691 of the outer peripheral seal ring 69 and the seal ring 69. 69 is made of a ceramic member set to be smaller than each radius of curvature of the circumferential inner surface 660 of the spring receiving member 66 corresponding to 69, and the inner surfaces at both longitudinal ends contact the outer surface 691 of the seal ring 69,
The central portion is in contact with the inner surface 660 of the spring receiving member 66. Due to the spring force of the ceramic spring 70, the seal ring 69, which is a first member on the inner peripheral side that is curved in a ring shape.
Are supported so as to be relatively movable in the radial direction with respect to a spring receiving member 66 which is a second member on the outer peripheral side curved in a ring shape. The spring receiving member 66 and the seal ring 69 are divided into six in the circumferential direction.
【００２１】この場合も、内周側の第１の部材であるシ
ールリング６９と、外周側の第２の部材であるばね受け
部材６６との間に、両部材間のスペースを大きくするこ
となくセラミックばね７０を介在させることができる。Also in this case, the space between the seal ring 69, which is the first member on the inner peripheral side, and the spring receiving member 66, which is the second member on the outer peripheral side, is increased without increasing the space between the two members. A ceramic spring 70 can be interposed.
【００２２】これらセラミックばね５０，７０の弾性力
により、シールリング４９，６９が遷移ダクト２６の下
流端部の内外周面に圧接される。これにより、セラミッ
ク部品である複数の遷移ダクト２６の下流端部の内外周
のシールを、複数のリング片４９ａ，６９ａからなるシ
ールリング４９，６９で行うことができ、大型のガスタ
ービンに対応できる。The seal rings 49 and 69 are pressed against the inner and outer peripheral surfaces of the downstream end of the transition duct 26 by the elastic force of the ceramic springs 50 and 70. Thereby, the inner and outer circumferences of the downstream ends of the plurality of transition ducts 26, which are ceramic parts, can be sealed by the seal rings 49 and 69 including the plurality of ring pieces 49a and 69a, and it is possible to cope with a large gas turbine. .
【００２３】前記各遷移ダクト２６の下流端部の両側面
には、図３（Ｂ），（Ｃ）に部分平面図で示すように、
周方向に隣接する遷移ダクト２６の側面との間をシール
するシール溝５１が形成されている。そのシール溝５１
に、図３（Ｅ）に示す別部材のシール板５２を、図３
（Ｄ）に鎖線で示すように嵌め込むことにより、隣合う
遷移ダクト２６の下流端部の両側面でシール板５２を図
３（Ｆ）のように挟んで、両下流端部間がシールされて
いる。シール板５２は、シール溝５１に嵌め込んだの
ち、その上下の爪５２ａを外側へ折り曲げて、シール溝
５１から径方向の内外方に脱落するのが防止される。As shown in the partial plan views of FIGS. 3B and 3C,
A sealing groove 51 is formed to seal between the transition duct 26 and the side surface of the transition duct 26 that is adjacent in the circumferential direction. The seal groove 51
Next, the seal plate 52 of another member shown in FIG.
3D, the sealing plate 52 is sandwiched between both downstream sides of the downstream end of the adjacent transition duct 26 as shown in FIG. ing. After the seal plate 52 is fitted into the seal groove 51, the upper and lower claws 52 a are bent outward to prevent the seal plate 52 from dropping inward and outward in the radial direction from the seal groove 51.
【００２４】タービン４の第１段ノズル５３もセラミッ
ク部品からなる。このノズル５３は、図５に示すよう
に、周方向に分割された複数のノズルセグメント５４に
より形成される。各ノズルセグメント５４の外周壁部５
５には突部５５ａが形成されている。また、ノズル５３
の外周に配置されてハウジング１４（図２）に固定され
る金属製リング部材５７の内周部には、その周方向に並
べて複数の凹部５７ａが形成されている。ノズルセグメ
ント５４の凸部５５ａと金属製リング５７の凹部５７ａ
とが、図５に示すように噛み合うことにより、ノズルセ
グメント５４の周方向についての位置決めが図られてお
り、図２に示す燃焼ガスＧの流れ方向へは移動自在とさ
れている。ノズルセグメント５４の凸部５５ａは、その
下流側の面がハウジング１４の受け部１４ａで受け止め
られている。The first stage nozzle 53 of the turbine 4 is also made of a ceramic component. This nozzle 53 is formed by a plurality of nozzle segments 54 divided in the circumferential direction, as shown in FIG. Outer peripheral wall 5 of each nozzle segment 54
5 is formed with a protrusion 55a. In addition, the nozzle 53
A plurality of concave portions 57a are formed in the inner peripheral portion of the metal ring member 57 arranged on the outer periphery of the metal ring member 57 and fixed to the housing 14 (FIG. 2). Convex portion 55a of nozzle segment 54 and concave portion 57a of metal ring 57
By engaging with each other as shown in FIG. 5, positioning in the circumferential direction of the nozzle segment 54 is achieved, and the nozzle segment 54 is movable in the flow direction of the combustion gas G shown in FIG. The downstream surface of the convex portion 55 a of the nozzle segment 54 is received by the receiving portion 14 a of the housing 14.
【００２５】また、第１段ノズル５３の内周面は、遷移
ダクト２６の下流端部の内外周面の場合と同様に、シー
ルリング５９（第２の部材）およびセラミックばね６０
を介してハウジング１４側のばね受け部材６７（第１の
部材）に支持されている。この場合のシールリング５９
も、周方向に分割された複数のセラミック製リング片か
らなり、セラミックばね６０もシールリング５９の内周
面と曲率半径が異なる円弧状に弯曲した細長い板状に形
成されたセラミック材料からなる。このセラミックばね
６０の弾性力により、シールリング５９が第１段ノズル
５３の内周面に圧接される。これにより、セラミック部
品である複数のノズルセグメント５４からなる第１段ノ
ズル５３の内周のシールを、複数のリング片からなるシ
ールリング５９で行うことができ、大型のガスタービン
に対応できる。The inner peripheral surface of the first stage nozzle 53 has a seal ring 59 (second member) and a ceramic spring 60 as in the case of the inner peripheral surface at the downstream end of the transition duct 26.
Is supported by the spring receiving member 67 (first member) on the housing 14 side. Seal ring 59 in this case
The ceramic spring 60 is also formed of a ceramic material formed in an elongated plate shape curved in an arc shape having a different radius of curvature from the inner peripheral surface of the seal ring 59. The seal ring 59 is pressed against the inner peripheral surface of the first stage nozzle 53 by the elastic force of the ceramic spring 60. Thus, the inner periphery of the first stage nozzle 53 composed of a plurality of nozzle segments 54, which is a ceramic part, can be sealed by the seal ring 59 composed of a plurality of ring pieces, and can be used for a large gas turbine.
【００２６】また、第１段ノズル５３の外周には、リン
グ状のばねホルダ６１が配置され、前記金属製リング部
材５７とともにハウジング１４にボルト締めされてい
る。このばねホルダ６１により、周方向に並べて配置さ
れる複数のコイルスプリング６２が保持され、これらス
プリングコイル６２の弾性力がばね受け部材６３を介し
てノズルセグメント５４の凸部５５ａの上流側の面に軸
方向に作用する。このようなノズル５３の支持構造によ
り、セラミック部品である第１段ノズル５３と金属製リ
ング部材５７などとの熱膨張差をコイルスプリング６２
で吸収することができ、ノズル５３が損傷しにくくな
る。A ring-shaped spring holder 61 is arranged on the outer periphery of the first stage nozzle 53, and is bolted to the housing 14 together with the metal ring member 57. A plurality of coil springs 62 arranged side by side in the circumferential direction are held by the spring holder 61, and the elastic force of the spring coils 62 is applied to the surface on the upstream side of the convex portion 55 a of the nozzle segment 54 via the spring receiving member 63. Acts axially. With such a support structure of the nozzle 53, the difference in thermal expansion between the first-stage nozzle 53, which is a ceramic component, and the metal ring member 57 is reduced by the coil spring 62.
And the nozzle 53 is less likely to be damaged.
【００２７】なお、前記実施形態では、セラミックばね
５０，６０，７０を円弧状に弯曲したものとしたが、円
弧状でなく、単に弯曲した細長い板状とした場合でも同
様の効果が得られる。また、セラミックばね５０，６
０，７０は、シールリング４９，５９，６９およびばね
受け部材６５，６６，６７のような円周状の内外面を持
つ部材間に介装されるものに限られず、円周の一部であ
る円弧の形状の内外面を持つ部材間に介装されたもので
も、同様な効果が得られる。In the above embodiment, the ceramic springs 50, 60, and 70 are curved in an arc shape. However, similar effects can be obtained even if the ceramic springs are not arc shapes but are simply curved and elongated plate shapes. Also, the ceramic springs 50, 6
The reference numerals 0 and 70 are not limited to those interposed between members having circumferential inner and outer surfaces such as the seal rings 49, 59 and 69 and the spring receiving members 65, 66 and 67, and a part of the circumference. The same effect can be obtained even if the member is interposed between members having inner and outer surfaces having a certain arc shape.
【００２８】[0028]
【発明の効果】以上のように、本発明のセラミックばね
によれば、セラミック材料からなり、弯曲した細長い板
状に形成されているので、弯曲した内周側の部材の外面
と弯曲した外周側の部材の内面との間に介在させること
により、両部材間のスペースを大きく取ることなく、そ
のセラミックばねのばね力で両部材の一方を他方に対し
て径方向に相対移動可能に支持することができる。As described above, according to the ceramic spring of the present invention, since it is made of a ceramic material and is formed in a curved elongated plate shape, the outer surface of the curved inner peripheral member and the curved outer peripheral side are formed. By supporting the one of the two members radially relative to the other by the spring force of the ceramic spring without interposing a large space between the two members by interposing the inner surface between the two members. Can be.
【００２９】また、本発明の弾性支持構造によれば、第
１の部材の弯曲した外面と第２の部材の弯曲した内面と
の間に、前記構成のセラミックばねが介在して、前記セ
ラミックばねのばね力により、前記両部材の一方が他方
に対して径方向に相対移動可能に支持されており、前記
セラミックばねは、その長手方向両端部で第１の部材に
接触し、中央部で第２の部材に接触しているので、両部
材間のスペースを大きく取ることなく、そのセラミック
ばねのばね力で、両部材の一方を他方に対して径方向に
相対移動可能に支持することができる。According to the elastic support structure of the present invention, the ceramic spring having the above-described structure is interposed between the curved outer surface of the first member and the curved inner surface of the second member. Due to the spring force, one of the two members is supported so as to be relatively movable in the radial direction with respect to the other. The ceramic spring contacts the first member at both ends in the longitudinal direction, and the ceramic spring contacts the first member at the center. Since the two members are in contact with each other, one of the two members can be supported so as to be relatively movable in the radial direction with respect to the other by the spring force of the ceramic spring without taking a large space between the two members. .
【図１】本発明の一実施形態に係る弾性支持構造を有す
るガスタービンを示す一部破断した概略側面図である。FIG. 1 is a partially cut-away schematic side view showing a gas turbine having an elastic support structure according to an embodiment of the present invention.
【図２】図１の燃焼器の要部を拡大して詳細に示す縦断
面図である。FIG. 2 is an enlarged longitudinal sectional view showing a main part of the combustor of FIG. 1 in detail.
【図３】（Ａ）は同燃焼器における遷移ダクトの背面
図、（Ｂ）は同遷移ダクトの下流端部の一部を示す平面
図、（Ｃ）は同遷移ダクトの下流端部の他部を示す平面
図、（Ｄ）は同遷移ダクトの下流端部の側面図、（Ｅ）
はシール板を示す斜視図、（Ｆ）は隣合う遷移ダクトの
下流端部のシール構造を示す要部平面図である。FIG. 3A is a rear view of a transition duct in the combustor, FIG. 3B is a plan view showing a part of a downstream end of the transition duct, and FIG. (D) is a side view of the downstream end of the transition duct, (E)
3 is a perspective view showing a seal plate, and FIG. 3 (F) is a plan view of a main part showing a seal structure at a downstream end of an adjacent transition duct.
【図４】同燃焼器における遷移ダクトの下流端部の支持
構造を示す背面図である。FIG. 4 is a rear view showing a support structure of a downstream end of a transition duct in the combustor.
【図５】タービンのノズルを示す正面図である。FIG. 5 is a front view showing a nozzle of the turbine.
５０，６０，７０…セラミックばね、４９，５９…シー
ルリング（第２の部材）、６５…ばね受け部材（第１の
部材）、６６…ばね受け部材（第２の部材）、６７…ば
ね受け部材（第１の部材）、６９…シールリング（第１
の部材）、４９０，６６０…内面、６５１，６９１…外
面。50, 60, 70: ceramic spring, 49, 59: seal ring (second member), 65: spring receiving member (first member), 66: spring receiving member (second member), 67: spring receiving member Member (first member), 69 ... seal ring (first member)
490, 660 ... inner surface, 651, 691 ... outer surface.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 市川 善浩 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 久保 敏文 鹿児島県国分市山下町１番４号 京セラ株 式会社総合研究所内 (72)発明者 嵜元 敏和 鹿児島県国分市山下町１番４号 京セラ株 式会社総合研究所内 Ｆターム(参考） 3J040 AA01 AA13 BA01 EA16 FA13 HA15 3J059 AE04 BA19 BC01 GA50 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihiro Ichikawa 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Toshifumi Kubo 1-4, Yamashita-cho, Kokubu-shi, Kagoshima Kyocera Corporation (72) Inventor Toshikazu Sakimoto 1-4-4 Yamashita-cho, Kokubu-shi, Kagoshima Kyocera Co., Ltd. F-term (reference) 3J040 AA01 AA13 BA01 EA16 FA13 HA15 3J059 AE04 BA19 BC01 GA50
Claims (4)
い板状に形成されているセラミックばね。1. A ceramic spring formed of a ceramic material and formed in a curved and elongated plate shape.
るセラミックばね。2. The ceramic spring according to claim 1, wherein the ceramic spring is curved in an arc shape.
の弯曲した内面との間に請求項１または２に記載のセラ
ミックばねが介在して、 前記セラミックばねのばね力により、前記両部材の一方
が他方に対して径方向に相対移動可能に支持されてお
り、 前記セラミックばねは、その長手方向両端部で第１の部
材に接触し、中央部で第２の部材に接触している弾性支
持構造。3. The ceramic spring according to claim 1, wherein a ceramic spring according to claim 1 is interposed between a curved outer surface of the first member and a curved inner surface of the second member. One of the two members is supported so as to be relatively movable in the radial direction with respect to the other, and the ceramic spring contacts the first member at both ends in the longitudinal direction, and contacts the second member at the center. Has elastic support structure.
または円周状であり、 前記セラミックばねは円弧状に形成されて、自然状態で
その曲率半径が、前記第１の部材の外面のおよび第２の
部材の内面の各曲率半径よりも小さく設定されている弾
性支持構造。4. The method according to claim 3, wherein an outer surface of the first member and an inner surface of the second member are arc-shaped or circumferential, and the ceramic spring is formed in an arc shape and has a natural curvature. A resilient support structure wherein a radius is set to be smaller than a radius of curvature of each of an outer surface of the first member and an inner surface of the second member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000138552A JP3516390B2 (en) | 2000-05-11 | 2000-05-11 | Elastic support structure using ceramic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000138552A JP3516390B2 (en) | 2000-05-11 | 2000-05-11 | Elastic support structure using ceramic spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001317577A true JP2001317577A (en) | 2001-11-16 |
| JP3516390B2 JP3516390B2 (en) | 2004-04-05 |
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ID=18646143
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000138552A Expired - Fee Related JP3516390B2 (en) | 2000-05-11 | 2000-05-11 | Elastic support structure using ceramic spring |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533572A1 (en) * | 2003-11-24 | 2005-05-25 | Siemens Aktiengesellschaft | Gas turbine combustion chamber and gas turbine |
| DE102004018999A1 (en) * | 2004-04-20 | 2005-11-24 | Forschungszentrum Jülich GmbH | Spring element and production and use thereof |
| EP1602804A2 (en) * | 2004-05-31 | 2005-12-07 | Kawasaki Jukogyo Kabushiki Kaisha | Turbine nozzle support structure |
-
2000
- 2000-05-11 JP JP2000138552A patent/JP3516390B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533572A1 (en) * | 2003-11-24 | 2005-05-25 | Siemens Aktiengesellschaft | Gas turbine combustion chamber and gas turbine |
| DE102004018999A1 (en) * | 2004-04-20 | 2005-11-24 | Forschungszentrum Jülich GmbH | Spring element and production and use thereof |
| DE102004018999B4 (en) * | 2004-04-20 | 2006-04-20 | Forschungszentrum Jülich GmbH | Spring element and production and use thereof |
| EP1602804A2 (en) * | 2004-05-31 | 2005-12-07 | Kawasaki Jukogyo Kabushiki Kaisha | Turbine nozzle support structure |
| US7112042B2 (en) | 2004-05-31 | 2006-09-26 | Kawasaki Jukogyo Kabushiki Kaisha | Turbine nozzle support structure |
| EP1602804A3 (en) * | 2004-05-31 | 2007-07-25 | Kawasaki Jukogyo Kabushiki Kaisha | Turbine nozzle support structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3516390B2 (en) | 2004-04-05 |
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