JP2018159356A5 - - Google Patents
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- JP2018159356A5 JP2018159356A5 JP2017057979A JP2017057979A JP2018159356A5 JP 2018159356 A5 JP2018159356 A5 JP 2018159356A5 JP 2017057979 A JP2017057979 A JP 2017057979A JP 2017057979 A JP2017057979 A JP 2017057979A JP 2018159356 A5 JP2018159356 A5 JP 2018159356A5
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- 230000002093 peripheral Effects 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 13
- 238000000638 solvent extraction Methods 0.000 claims 4
- 230000001629 suppression Effects 0.000 description 2
Description
この発明は、上記課題を解決するため、以下の手段を採用する。
この発明の第一態様によれば、軸シール装置は、ロータと前記ロータを囲うステータとの間に設けられて、前記ロータと前記ステータとの間の空間を前記ロータの中心軸方向において高圧領域と低圧領域とに仕切る。軸シール装置は、互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、各前記シールリング片に固定されて前記ロータに対向するシール体と、を備える。前記シールリングは、前記ステータの径方向内側に設けられたハウジングに保持され、少なくとも前記ハウジングの内周面よりも径方向内側に配置されたベース部を有する。少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備える。前記中心軸方向における前記連通溝の一端部及び他端部は、それぞれ前記ベース部で前記中心軸方向に延びている。
The present invention adopts the following means in order to solve the above problems.
According to the first aspect of the present invention, the shaft seal device is provided between the rotor and the stator surrounding the rotor, and a space between the rotor and the stator is provided in a high pressure region in a central axis direction of the rotor. And the low pressure area. The shaft seal device includes a seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that end faces in the circumferential direction are adjacent to each other, and a seal body fixed to each of the seal ring pieces and facing the rotor, Equipped with. The seal ring is held by a housing provided inside the stator in the radial direction, and has a base portion arranged at least radially inside the inner peripheral surface of the housing. At least one of the seal ring pieces includes a communication groove formed to be recessed from the end surface and connecting the high pressure region and the low pressure region so as to bypass the seal body. One end portion and the other end portion of the communication groove in the central axis direction extend in the central axis direction at the base portion.
この発明の第二態様によれば、軸シール装置は、ロータと前記ロータを囲うステータとの間に設けられて、前記ロータの中心軸方向で高圧領域と低圧領域とを仕切る軸シール装置であって、互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、前記シールリング片に対し、前記高圧領域及び前記低圧領域の少なくとも一方に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、前記案内部材は、前記ロータの外周面に設けられ、前記ロータと一体に回転することで前記作動流体を径方向外側に導く翼を備えるようにしてもよい。
このように構成することで、案内部材によって作動流体がシール体とロータの外周面との隙間よりも径方向外方に案内される。これにより、異物は、作動流体とともにシール体とロータの外周面との隙間よりも径方向外方に導かれ、シール体とロータの外周面との隙間に異物が侵入することを抑える。したがって、シール体まで異物が到達することを抑える。
According to the second aspect of the present invention, the shaft sealing device is a shaft sealing device that is provided between the rotor and the stator that surrounds the rotor and separates a high pressure region and a low pressure region in the central axis direction of the rotor. A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other, and a seal body fixed to each of the seal ring pieces and facing the rotor, At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body, and with respect to the seal ring piece, the high pressure region and provided on at least one of said low pressure region, with a guide member for guiding the working fluid radially outward from the gap between the outer peripheral surface of the said seal body rotor, before The guide member is provided on an outer circumferential surface of the rotor, may be so that with wings for guiding the working fluid radially outwardly by rotating the rotor and integrally.
With this structure, the guide member guides the working fluid radially outward of the gap between the seal body and the outer peripheral surface of the rotor. As a result, the foreign matter is guided radially outward from the gap between the seal body and the outer peripheral surface of the rotor together with the working fluid, and prevents the foreign matter from entering the gap between the seal body and the outer peripheral surface of the rotor. Therefore, it is possible to prevent foreign matter from reaching the seal body.
さらに、ロータの外周面に設けられた翼がロータと一体に回転すると、翼によって生成された径方向外側に向かう作動流体の流れによって、異物は、シール体とロータの外周面との隙間よりも径方向外方に案内される。 Further , when the blades provided on the outer peripheral surface of the rotor rotate integrally with the rotor, the flow of the working fluid generated by the blades toward the radially outer side causes the foreign matter to become smaller than the gap between the seal body and the outer peripheral surface of the rotor. Guided radially outward.
この発明の第三態様によれば、軸シール装置は、ロータと前記ロータを囲うステータとの間に設けられて、前記ロータの中心軸方向で高圧領域と低圧領域とを仕切る軸シール装置であって、互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、前記シールリング片に対し、少なくとも前記高圧領域側に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、前記案内部材は、前記ロータの外周面に設けられ、径方向外側に延びる壁体であるようにしてもよい。
このように構成することで、壁体によって、異物がシール体とロータの外周面との隙間に入り込むことが抑えられる。また、異物は、壁体に衝突した作動流体の流れとともに、径方向外方に案内される。
According to the third aspect of the present invention, the shaft sealing device is a shaft sealing device that is provided between the rotor and the stator that surrounds the rotor and separates a high pressure region and a low pressure region in the central axis direction of the rotor. A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other, and a seal body fixed to each of the seal ring pieces and facing the rotor, At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body, and with respect to the seal ring piece, provided at least the high pressure area side, with a guide member for guiding the working fluid radially outward from the gap between the outer peripheral surface of the said seal body rotor, the guide member, the b Provided on the outer peripheral surface of the motor, it may be a wall extending radially outwardly.
With this configuration, the wall body can prevent foreign matter from entering the gap between the seal body and the outer peripheral surface of the rotor. Further, the foreign matter is guided outward in the radial direction together with the flow of the working fluid that has collided with the wall body.
この発明の第四態様によれば、軸シール装置は、ロータと前記ロータを囲うステータとの間に設けられて、前記ロータの中心軸方向で高圧領域と低圧領域とを仕切る軸シール装置であって、互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、前記シールリング片に対し、少なくとも前記高圧領域側に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、前記案内部材は、前記シールリング片に設けられ、径方向内側に延びる傘状部材であるようにしてもよい。
このように構成することで、傘状の案内部材によって、異物がシール体とロータの外周面との隙間に入り込みにくくなる。
According to the fourth aspect of the present invention, the shaft sealing device is a shaft sealing device that is provided between the rotor and the stator surrounding the rotor and separates a high pressure region and a low pressure region in the central axis direction of the rotor. A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other, and a seal body fixed to each of the seal ring pieces and facing the rotor, At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body, and with respect to the seal ring piece, provided at least the high pressure area side, with a guide member for guiding the working fluid radially outward from the gap between the outer peripheral surface of the said seal body rotor, said guide member, said sheet Provided Luling piece, may be located in an umbrella-like member extending radially inward.
With this structure, the umbrella-shaped guide member prevents foreign matter from entering the gap between the seal body and the outer peripheral surface of the rotor.
この発明の第五態様によれば、第一から第四態様の何れか一つの態様に係るシール体は、前記中心軸方向に間隔をあけて複数設けられてもよい。連通溝は、前記中心軸方向において互いに隣接する前記シール体同士の間に連通する分岐溝を備えるようにしてもよい。 このように構成することで、異物がシール体とロータの外周面との隙間に入り込んだ場合であっても、複数のシール体の間に設けられた分岐溝を通して、異物が連通溝を介して、シール体を迂回して排出される。 According to the fifth aspect of the present invention, a plurality of seal bodies according to any one of the first to fourth aspects may be provided at intervals in the central axis direction. The communication groove may include a branch groove that communicates between the seal bodies that are adjacent to each other in the central axis direction. With this configuration, even if foreign matter enters the gap between the seal body and the outer peripheral surface of the rotor, the foreign matter passes through the branch groove provided between the plurality of seal bodies and through the communication groove. , Bypassing the seal body and discharged.
この発明の第六態様によれば、第五態様に係る軸シール装置は、前記シール体及び前記ロータの外周面の少なくとも一方に、前記シール体と前記ロータの外周面との隙間を前記中心軸方向に沿って流れる作動流体を、前記分岐溝側に案内する案内面が形成されているようにしてもよい。
このように構成することで、シール体とロータの外周面との隙間に入り込んだ異物は、案内面によって分岐溝側に案内される。これによって、異物を、より確実に分岐溝を通して連通溝に送り込むことができる。
According to a sixth aspect of the present invention, in the shaft sealing device according to the fifth aspect, a gap between the seal body and the outer peripheral surface of the rotor is provided on at least one of the outer peripheral surface of the seal body and the rotor. A guide surface may be formed to guide the working fluid flowing along the direction to the branch groove side.
With this configuration, the foreign matter that has entered the gap between the seal body and the outer peripheral surface of the rotor is guided to the branch groove side by the guide surface. Thereby, the foreign matter can be more reliably fed into the communication groove through the branch groove.
この発明の第七態様によれば、第一から第六態様の何れか一つの態様に係る軸シール装置は、前記連通溝に対し、前記ロータが前記中心軸周りに回転することで前記ロータの径方向外側で生じる作動流体の前記周方向に沿った流れの下流側に、前記作動流体を前記連通溝に案内する周方向案内部材を備えるようにしてもよい。
このように構成することで、作動流体とともに周方向に沿って流れる異物が、周方向案内部材によって、連通溝に案内される。これによって、異物を、より確実に連通溝に送り込むことができる。
According to a seventh aspect of the present invention, in the shaft seal device according to any one of the first to sixth aspects, the rotor rotates about the central axis with respect to the communication groove, A circumferential guide member that guides the working fluid to the communication groove may be provided on the downstream side of the flow of the working fluid that occurs radially outside along the circumferential direction.
With this configuration, the foreign matter that flows along with the working fluid in the circumferential direction is guided to the communication groove by the circumferential guide member. As a result, the foreign matter can be more reliably fed into the communication groove.
この発明の第八態様によれば、回転機械は、第一から第七態様の何れか一つの態様における軸シール装置を備える。
このように構成することで、異物を、連通溝を介して、シール体を迂回して排出することで、異物によってシール体が影響を受けることを抑える。また、高圧領域と低圧領域との差圧が小さいシールリング片の端面同士が対向する部分に連通溝を形成することで、連通溝による影響が小さくて済み、回転機械の作動効率の低下を抑えることができる。さらに、連通溝をシールリング片の端面に形成することで、連通溝を形成するための加工を容易に行うことができる。
According to an eighth aspect of the present invention, a rotary machine includes the shaft seal device according to any one of the first to seventh aspects.
With this configuration, the foreign matter is discharged through the communication groove while bypassing the seal body, thereby suppressing the foreign matter from affecting the seal body. Further, by forming the communication groove in the portion where the end surfaces of the seal ring piece where the differential pressure between the high pressure region and the low pressure region is small face each other, the influence of the communication groove can be small, and the decrease in operating efficiency of the rotary machine can be suppressed be able to. Further, by forming the communication groove on the end surface of the seal ring piece, the processing for forming the communication groove can be easily performed.
Claims (8)
互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、
各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、
前記シールリングは、
前記ステータの径方向内側に設けられたハウジングに保持され、
少なくとも前記ハウジングの内周面よりも径方向内側に配置されたベース部を有し、
少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、
前記中心軸方向における前記連通溝の一端部及び他端部は、それぞれ前記ベース部で前記中心軸方向に延びている
軸シール装置。 A shaft seal device provided between a rotor and a stator surrounding the rotor, for partitioning a high pressure region and a low pressure region in a central axis direction of the rotor,
A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other,
A seal body fixed to each of the seal ring pieces and facing the rotor;
The seal ring is
It is held in a housing provided inside the stator in the radial direction,
At least a base portion arranged radially inward of the inner peripheral surface of the housing,
At least one of the seal ring pieces is formed so as to be recessed from the end surface , and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body ,
One end portion and the other end portion of the communication groove in the central axis direction extend in the central axis direction at the base portion, respectively .
互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、
各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、
少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、
前記シールリング片に対し、少なくとも前記高圧領域側に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、
前記案内部材は、前記ロータの外周面に設けられ、前記ロータと一体に回転することで前記作動流体を径方向外側に導く翼を備える軸シール装置。 A shaft seal device provided between a rotor and a stator surrounding the rotor, for partitioning a high pressure region and a low pressure region in a central axis direction of the rotor,
A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other,
A seal body fixed to each of the seal ring pieces and facing the rotor;
At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body,
A guide member that is provided at least on the high pressure region side with respect to the seal ring piece, and that guides the working fluid radially outward of a gap between the seal body and the outer peripheral surface of the rotor;
The guide member is provided on the outer peripheral surface of the rotor, the shaft seal device Ru comprising a blade guiding the working fluid radially outwardly by rotating the rotor and integrally.
互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、
各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、
少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、
前記シールリング片に対し、少なくとも前記高圧領域側に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、
前記案内部材は、前記ロータの外周面に設けられ、径方向外側に延びる壁体である軸シール装置。 A shaft seal device provided between a rotor and a stator surrounding the rotor, for partitioning a high pressure region and a low pressure region in a central axis direction of the rotor,
A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other,
A seal body fixed to each of the seal ring pieces and facing the rotor;
At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body,
A guide member that is provided at least on the high pressure region side with respect to the seal ring piece, and that guides the working fluid radially outward of a gap between the seal body and the outer peripheral surface of the rotor;
The guide member is provided on the outer peripheral surface of the rotor, the shaft sealing device Ru wall der extending radially outward.
互いに周方向の端面同士が隣接するように周方向に複数設けられたシールリング片からなるシールリングと、
各前記シールリング片に固定されて前記ロータに対向するシール体と、を備え、
少なくとも一つの前記シールリング片は、前記端面から凹むように形成されて、前記シール体を迂回するように前記高圧領域と前記低圧領域とを連通させる連通溝を備え、
前記シールリング片に対し、少なくとも前記高圧領域側に設けられ、前記シール体と前記ロータの外周面との隙間よりも径方向外方に作動流体を導く案内部材を備え、
前記案内部材は、前記シールリング片に設けられ、径方向内側に延びる傘状部材である軸シール装置。 A shaft seal device provided between a rotor and a stator surrounding the rotor, for partitioning a high pressure region and a low pressure region in a central axis direction of the rotor,
A seal ring composed of a plurality of seal ring pieces provided in the circumferential direction so that the end faces in the circumferential direction are adjacent to each other,
A seal body fixed to each of the seal ring pieces and facing the rotor;
At least one of the seal ring pieces is formed so as to be recessed from the end surface, and includes a communication groove that communicates the high pressure region and the low pressure region so as to bypass the seal body,
A guide member that is provided at least on the high pressure region side with respect to the seal ring piece, and that guides the working fluid radially outward of a gap between the seal body and the outer peripheral surface of the rotor;
The guide member, the provided sealing ring segment, umbrella member der Ru shaft sealing device extending radially inwardly.
前記連通溝は、前記中心軸方向において互いに隣接する前記シール体同士の間に連通する分岐溝を備える請求項１から４の何れか一項に記載の軸シール装置。 A plurality of the seal bodies are provided at intervals in the central axis direction,
The communication Tsumizo is shaft sealing apparatus according to claim 1, any one of 4 with a branch groove communicating between the seal body adjacent to each other in the central axis direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017057979A JP6842963B2 (en) | 2017-03-23 | 2017-03-23 | Shaft sealing device, rotating machine |
| PCT/JP2017/031215 WO2018173316A1 (en) | 2017-03-23 | 2017-08-30 | Shaft seal device, and rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017057979A JP6842963B2 (en) | 2017-03-23 | 2017-03-23 | Shaft sealing device, rotating machine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2018159356A JP2018159356A (en) | 2018-10-11 |
| JP2018159356A5 true JP2018159356A5 (en) | 2020-04-30 |
| JP6842963B2 JP6842963B2 (en) | 2021-03-17 |
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| JP2017057979A Active JP6842963B2 (en) | 2017-03-23 | 2017-03-23 | Shaft sealing device, rotating machine |
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| WO (1) | WO2018173316A1 (en) |
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| CN114483209B (en) * | 2021-12-27 | 2023-07-14 | 东方电气集团东方汽轮机有限公司 | Sealing structure of steam seal body at shaft end of steam turbine |
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| JPH11257014A (en) * | 1998-03-06 | 1999-09-21 | Toshiba Corp | Working fluid leakage prevention apparatus for axial-flow turbine |
| US8052375B2 (en) * | 2008-06-02 | 2011-11-08 | General Electric Company | Fluidic sealing for turbomachinery |
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2017
- 2017-03-23 JP JP2017057979A patent/JP6842963B2/en active Active
- 2017-08-30 WO PCT/JP2017/031215 patent/WO2018173316A1/en active Application Filing
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