WO1999045240A1 - Bague d'etancheite pour turbine a vapeur - Google Patents
Bague d'etancheite pour turbine a vapeur Download PDFInfo
- Publication number
- WO1999045240A1 WO1999045240A1 PCT/JP1999/000770 JP9900770W WO9945240A1 WO 1999045240 A1 WO1999045240 A1 WO 1999045240A1 JP 9900770 W JP9900770 W JP 9900770W WO 9945240 A1 WO9945240 A1 WO 9945240A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- pieces
- seal
- piece
- parts
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/025—Seal clearance control; Floating assembly; Adaptation means to differential thermal dilatations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/441—Free-space packings with floating ring
- F16J15/442—Free-space packings with floating ring segmented
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
Definitions
- the present invention relates to a seal ring used between a rotating part and a rotating machine such as a steam turbine.
- a seal fin is provided for sealing between the rotating portion and the fixed portion facing the rotating portion, and a seal ring for supporting the seal fin is provided.
- Fig. 3 is a conceptual diagram of a conventional typical seal ring.
- the divided pieces 21a, 21b, 21c, 21 divided into four parts in the circumferential direction, up, down, left, and right. d, and the seal ring segments 21c, 21d arranged on the left and right are fixed in the horizontal direction by the support portions 23, 24.
- Each of the segments 21a, 21b, 21c , 21 d are interposed with a spring 22 biased in a direction parallel to a tangent to the rotating peripheral surface, and each of the divided pieces is configured to be vertically movable.
- the force of the spring 22 is urged in a direction parallel to the tangent of the rotating peripheral surface, that is, in a substantially circumferential direction, whereas the split piece 2 of the seal ring is 2 a, 22 b, 22 c, and 22 d move up and down, respectively. That is, during operation of the steam turbine, high-temperature, high-pressure steam flows around the seal ring, and the load due to its own weight is applied. The ring moves up and down.
- the present invention has been made in order to solve the above-mentioned problems, and has a seal fin on an inner surface, a seal ring piece divided into a plurality of pieces by a division surface that slides in a vertical direction, and a seal ring piece adjacent to the seal ring piece.
- a spring disposed between the springs and biased vertically along the dividing surface; and a plurality of seal ring guides engaged with the respective seal ring pieces and guiding the seal ring pieces in the vertical direction.
- the present invention provides a seal ring for a steam turbine having the following.
- the seal ring part divided into a plurality is divided by a dividing surface that slides in the up-down direction, and the spring disposed between the seal ring parts is the divided part.
- the seal ring guide that guides each seal ring piece also regulates the up and down directions, so the direction of movement of the seal ring piece
- the operation direction of the spring force and the guide direction of the seal ring guide are matched (three-in-one unit), so that the seal ring part operates properly and the sealing performance decreases. There is no danger and a suitable device can be obtained.
- the present invention provides a seal ring part divided into a plurality of parts by a dividing surface having a seal fin on an inner surface and sliding in a vertical direction, and a seal ring part disposed between adjacent seal ring parts and extending along the divided surface. And a plurality of seal ring guides that engage with each of the seal ring pieces and guide the seal ring pieces in the vertical direction.
- the upper and lower seal ring pieces and the seal ring guides respectively engaged with the upper and lower seal ring pieces are respectively vertically oriented.
- the present invention provides a seal ring for a steam turbine in which a spring biased is provided.
- the springs which are respectively urged in the vertical direction are disposed between the upper and lower seal ring pieces and the seal ring guides engaged with them, so that the upper seal ring pieces are provided.
- the lower seal ring part is restrained by the spring force between the upper seal ring guide and the lower seal ring guide, and when the steam turbine starts to take load, high temperature is generated around these seal ring parts.
- the high-pressure steam passes, and the self-weight of the seal ring part also adds to the pressure difference between the inside and the outside.
- the upper and lower seal ring parts move inwardly with a spring force and move, and the upper and lower seal rings It acts to reduce the clearance between the inner seal fin and the opposing rotor. Therefore, the leakage of steam from the seal fins is sufficiently reduced, and the sealing performance is further improved.
- FIG. 1 is an explanatory view schematically showing an outline of a seal ring of a steam bottle according to the first embodiment of the present invention in a sectional view.
- FIG. 2 is an explanatory view schematically showing, in cross-sectional view, an outline of the sealing of the steam turbine according to the second embodiment of the present invention.
- Figure 3 is a conceptual diagram of a seal ring for a steam turbine in which conventional split pieces are connected by a circumferential spring.
- the figure shows the assembled seal ring in a cross section perpendicular to the axis.
- Reference numeral 1a denotes an upper seal ring piece that is located 45 ° to the left and right of the perpendicular from the axis, that is, 90 ° above the axis.
- ib is a lower seal ring piece, which is disposed symmetrically with the upper seal ring piece 1a so as to be located within a range of 90 ° below.
- 1c is a right-side seal ring piece
- 1d is a left-side seal ring piece
- an axis is provided so as to fill between the upper seal ring piece 1a and the lower seal ring piece 1b. It is arranged so as to be located within a range of 90 ° in the left-right direction.
- Each seal ring piece 1a, 1b, 1c, 1d has a seal fin 2a, 2b, 2c, 2d on the inner circumference, respectively. That is, the upper seal ring piece 1a has the upper seal fin 2a, the lower seal ring piece 1b has the lower seal fin 2b, and the right seal ring piece 1c has the lower seal fin 2b. Right seal fins 2c are provided, and left seal fins 2d are provided corresponding to left seal ring pieces 1d, respectively.
- 3a is a dividing surface where the end faces of the upper seal ring piece 1a and the right seal ring piece 1c are joined or separated, and this divided face 3a is connected to the upper seal ring. It is as follows if it explains from a lug piece 1a side.
- a cut is made on the outer surface of the upper seal ring part 1a, it hangs down from above in parallel with a vertical line passing through the axis, breaks in the middle in the middle, and hangs down again in parallel with the vertical line. It is composed of a cut surface that passes through the inside of a
- the trajectory follows the same trajectory as the upper seal ring piece 1a side, but there is a difference in the vertical direction at the position where it can be broken horizontally in the middle.
- a space 9a is formed between the upper seal ring piece 1a and the right seal ring piece 1c. Since the dividing surface 3a is formed by the end surface of the upper seal ring piece 1a and the right seal ring piece 1c configured as described above, the dividing surface 3a is formed as a sliding surface.
- the upper seal ring piece 1a and the right seal ring piece 1c are relatively movable up and down.
- 3b, 3c, and 3d all indicate a dividing surface, and the dividing surface 3b is between the other end surface of the upper seal ring piece 1a and one end face of the left seal ring piece 1d.
- the dividing face 3c is between the other end face of the left seal ring piece 1d and one end face of the lower seal ring piece 1b, and the dividing face 3d is the other of the lower seal ring piece 1b. And the other end face of the right side seal ring piece 1c, and spaces 9b, 9c, 9d are formed in each of the divided faces 3b, 3c, 3d.
- the dividing surface 3a and the space 9a are substantially the same as in the case of the dividing surface 3a and the space 9a, and the description is omitted.
- Reference numeral 4a denotes a spring which is mounted in the space 9a so as to extend in the vertical direction and is urged in the vertical direction along the dividing surface 3a.
- 4b, 4c and 4d are also springs, are mounted in the spaces 9b, 9c and 9d, respectively, and their configuration and function are the same as those of the spring 4a.
- 5a and 5b are seal ring guides, both protruding downward from a fixed portion such as an upper wing ring, and are engaged with the upper seal ring piece 1a to form the upper seal ring.
- ⁇ is in charge of moving the piece 1a up and down ⁇
- 6a and 6b are also seal ring guides, which protrude upward from a fixed portion such as a wing ring positioned below the upper seal ring guides 5a and 5b, and a lower seal ring portion. It is engaged with the piece 1b to guide the lower seal ring piece 1b in the vertical direction.
- the sealing ring guides 7 and 8 are also provided on the fixed portion so as to face each other in the horizontal plane position.
- the seal ring guide ⁇ is the right seal ring piece 1 c and the seal ring guide 8 is the left seal ring portion. It engages with the pieces 1d, respectively, and serves to guide the right seal ring piece 1c and the left seal ring piece 1d in the vertical direction.
- the upper seal ring portion 1a, the lower seal ring portion 1b, the right seal ring portion 1c, and the left seal ring portion 1 Each of d is guided by the corresponding sealing ring guide 5a, 5b, 6a, 6b, 7, 8 and restricted by the inter-parting surfaces 3a, 3b, 3c, 3d
- the springs 4 are movable in the vertical direction along the dividing plane, and are arranged in the spaces 9a, 9b, 9c, 9d at the positions of the dividing planes 3a, 3b, 3c, 3d.
- reference numerals 1 to 9 are the same as the structure of the sealing ring in the first embodiment shown in FIG. 1, and thus the overlapping description will be omitted and the above description will be used as it is.
- the portions denoted by reference numerals 10a, 10b, 10c, and 10 (1 and 11 &, lib, lie, and lid, which are characteristic portions in the present embodiment, will be described in detail.
- reference numerals 10a and 10b denote spaces provided on the left and right of the upper seal ring part 1a, respectively, and grooves for engaging with the seal ring guides 5a and 5b are formed by the seal ring guides. Are provided so as to form spaces extending from the tips of the grooves 5a and 5b, and seal ring guides 5a and 5b slide up and down smoothly on the inner surface of these spaces 10a and 10b. Is possible.
- 10c10d is a space provided on the left and right of the lower seal ring part 1b, respectively, and the grooves engaging with the seal ring guides 6a, 6b are formed by the seal ring guides 6a, 6b.
- a space is formed extending from the tip of 6b, and the scenery ring guides 6a and 6b are also slidable up and down smoothly on the inner side surfaces of these spaces 10c and 10d.
- 11a and 11b are springs, which are inserted into the spaces 10a and 10b, respectively, and the surface of the upper seal ring piece 1a in the spaces 10a and 10b and the seal ring guide.
- 11d is also a spring, and is inserted into the spaces 10c, 10d, respectively. It is mounted between the surface of the lower seal ring piece 1b in 0c and 10d and the tip of the seal ring guides 6a and 6b by being urged vertically.
- each of the seal ring pieces 1a, lb, 1c, and 1d is a seal ring guide. It is guided by 5a, 5b, 6a, 6b and 7, 8 and is mutually regulated by the dividing planes 3a, 3b, 3c, 3d, and can move up and down. Also, the springs 4a, 4b, 4c, and 4d arranged in the spaces 9a, 9b, 9c, and 9d of the respective divided surfaces 3a, 3b, 3c, and 3d also move in the moving directions. The seal ring, the dividing surface, and the springs do not interfere with each other, and move up and down due to the differential pressure of each part in the turbine. Demonstrate the sealing performance.
- the present embodiment has the following effects.
- the springs 11a and 11b in the spaces 10a and 10b and the springs 11c and 11d in the spaces 10c and 10d are respectively connected to the upper seal ring piece 1a and the lower portion.
- the seal ring piece 11b is constrained by the spring force between the distal ends of the seal ring guides 5a and 5b and 6a and 6c.
- each seal ring piece 1a, 1b The upper and lower seal fins 2a and 2b inside the upper and lower seal fins 2a and 2b also move inward, and the clearance between the upper and lower seal fins 2a and 2b and the corresponding rotor side is further narrowed. Is further improved.
- the spring force of the springs 11a, lib, 11c, and 11d should be adjusted so that the amount of movement due to the differential pressure is such that the upper and lower seal fins 2a, 2b do not contact the opposing counterpart.
- a seal ring part that is divided into a plurality of parts on the division surface and slides in the vertical direction is provided between the seal ring parts and is urged in the vertical direction along the division surface.
- the seal ring is composed of a spring and a plurality of seal ring guides that guide the respective seal ring pieces in the vertical direction. Since the three are matched, the seal ring segments that are divided into multiple parts and adjacent to each other do not mix with each other, perform the predetermined operation accurately, and there is no danger that the sealing performance will decrease. A suitable device with high safety and reliability has been obtained.
- the seal ring of the steam turbine according to the second aspect of the present invention includes a seal ring part divided into a plurality of parts by a dividing surface having a seal fin on an inner surface and sliding vertically, and a seal ring adjacent to the seal ring.
- a spring disposed between the parts and vertically urged along the dividing surface; and engaging with each of the seal ring parts to guide each seal ring part in the vertical direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Mechanical Sealing (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69936636T DE69936636T2 (de) | 1998-03-02 | 1999-02-22 | Dichtungsring für dampfturbine |
EP99906455A EP1061237B1 (en) | 1998-03-02 | 1999-02-22 | Seal ring for steam turbine |
US09/623,366 US6572114B1 (en) | 1997-09-22 | 1999-02-22 | Seal ring for steam turbine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04944098A JP3905625B2 (ja) | 1998-03-02 | 1998-03-02 | 蒸気タービンのシールリング |
JP10/49440 | 1998-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999045240A1 true WO1999045240A1 (fr) | 1999-09-10 |
Family
ID=12831186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/000770 WO1999045240A1 (fr) | 1997-09-22 | 1999-02-22 | Bague d'etancheite pour turbine a vapeur |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1061237B1 (ja) |
JP (1) | JP3905625B2 (ja) |
KR (1) | KR100386186B1 (ja) |
CN (1) | CN1116500C (ja) |
DE (1) | DE69936636T2 (ja) |
ID (1) | ID26711A (ja) |
WO (1) | WO1999045240A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012046919A1 (ko) * | 2010-10-04 | 2012-04-12 | Hong Sun Young | 발전 터빈의 다이아프램용 실 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101648330B (zh) * | 2008-08-12 | 2012-09-05 | 哈尔滨仟兆电力技术有限公司 | 极限间隙密封的加工方法 |
US8356972B2 (en) * | 2008-12-10 | 2013-01-22 | Westinghouse Electric Company Llc | Thermally activated shutdown seals for rotatable shafts |
DE102013223682A1 (de) * | 2013-11-20 | 2015-05-21 | Siemens Aktiengesellschaft | Abdichtungsverfahren und Dichtungsring |
WO2023157520A1 (ja) * | 2022-02-18 | 2023-08-24 | 三菱重工業株式会社 | シール装置及び回転機械 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57116972A (en) * | 1981-01-09 | 1982-07-21 | Toshiba Corp | Shaft seal unit for rotor |
JPS60111004A (ja) * | 1983-11-21 | 1985-06-17 | Hitachi Ltd | 軸流形流体機械のケ−シング |
JPS633570U (ja) * | 1986-06-26 | 1988-01-11 |
-
1998
- 1998-03-02 JP JP04944098A patent/JP3905625B2/ja not_active Expired - Fee Related
-
1999
- 1999-02-22 ID IDW20001696A patent/ID26711A/id unknown
- 1999-02-22 DE DE69936636T patent/DE69936636T2/de not_active Expired - Lifetime
- 1999-02-22 KR KR10-2000-7009597A patent/KR100386186B1/ko not_active IP Right Cessation
- 1999-02-22 CN CN99803612A patent/CN1116500C/zh not_active Expired - Lifetime
- 1999-02-22 EP EP99906455A patent/EP1061237B1/en not_active Expired - Lifetime
- 1999-02-22 WO PCT/JP1999/000770 patent/WO1999045240A1/ja active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57116972A (en) * | 1981-01-09 | 1982-07-21 | Toshiba Corp | Shaft seal unit for rotor |
JPS60111004A (ja) * | 1983-11-21 | 1985-06-17 | Hitachi Ltd | 軸流形流体機械のケ−シング |
JPS633570U (ja) * | 1986-06-26 | 1988-01-11 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1061237A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012046919A1 (ko) * | 2010-10-04 | 2012-04-12 | Hong Sun Young | 발전 터빈의 다이아프램용 실 |
Also Published As
Publication number | Publication date |
---|---|
CN1292062A (zh) | 2001-04-18 |
EP1061237B1 (en) | 2007-07-25 |
EP1061237A4 (en) | 2004-09-01 |
JP3905625B2 (ja) | 2007-04-18 |
KR20010041447A (ko) | 2001-05-25 |
DE69936636D1 (de) | 2007-09-06 |
EP1061237A1 (en) | 2000-12-20 |
JPH11247617A (ja) | 1999-09-14 |
DE69936636T2 (de) | 2008-05-21 |
CN1116500C (zh) | 2003-07-30 |
KR100386186B1 (ko) | 2003-06-02 |
ID26711A (id) | 2001-02-01 |
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