CN115163213A - Rotary power generation equipment with isolation steam seal structure - Google Patents
Rotary power generation equipment with isolation steam seal structure Download PDFInfo
- Publication number
- CN115163213A CN115163213A CN202210987765.3A CN202210987765A CN115163213A CN 115163213 A CN115163213 A CN 115163213A CN 202210987765 A CN202210987765 A CN 202210987765A CN 115163213 A CN115163213 A CN 115163213A
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- China
- Prior art keywords
- rotor
- steam
- rotary power
- seal
- steam seal
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- 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.)
- Granted
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 63
- 238000010248 power generation Methods 0.000 title claims abstract description 10
- 210000004907 gland Anatomy 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 15
- 244000126211 Hericium coralloides Species 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- 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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/10—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using sealing fluid, e.g. steam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention belongs to the technical field of rotary power generation equipment, and particularly relates to rotary power generation equipment with an isolation steam seal structure. The technical scheme is as follows: a rotary power generation device with an isolated steam seal structure comprises a rotor assembly, wherein a stator assembly is sleeved outside the rotor assembly, and a plurality of steam seal teeth are arranged between the stator assembly and the rotor assembly to form a comb seal structure; and a plurality of isolation grooves are formed in the steam seal teeth. The invention provides rotary power generation equipment with an isolation steam seal structure, which can block the rotary flow of steam flow to improve the stability of a shaft system.
Description
Technical Field
The invention belongs to the technical field of rotary power generation equipment, and particularly relates to rotary power generation equipment with an isolation steam seal structure.
Background
Steam turbines typically employ comb seals to seal to reduce leakage of the steam flow. When the steam flow leaks in the axial direction in the sealing cavity of the comb-tooth steam seal, the steam flow is driven by the rotation friction of the rotor, and the steam flow also has a certain circumferential component velocity in the sealing cavity, namely, a spiral flow track is formed. When the rotor is in static or dynamic eccentricity due to the whirling motion during bending, eccentric wear, installation or rotation, the gap in the circumferential direction of the sealing cavity is uneven, so that uneven circumferential pressure distribution is formed at the outlet of the cavity, the uneven pressure distribution acts on the rotor to form a resultant force, and the component force (namely, transverse force) of the resultant force in the vertical direction of the rotor displacement can excite the rotor to further whirling motion, so that the stability of a steam turbine shafting is reduced, and steam flow excitation can occur in severe cases, thereby endangering the safe and stable operation of the steam turbine.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a rotary power generating apparatus with an isolated steam seal structure, which can block the rotational flow of a steam flow to improve the stability of a shaft system.
The technical scheme adopted by the invention is as follows:
a rotary power generation device with an isolated steam seal structure comprises a rotor assembly, wherein a stator assembly is sleeved outside the rotor assembly, and a plurality of steam seal teeth are alternately arranged between the stator assembly and the rotor assembly to form a comb seal structure; and a plurality of isolation grooves are formed in the steam seal teeth.
The steam flow leaks along the axial in the sealed intracavity of broach vapor seal structure to under rotor rotary friction drives, the steam flow has the trend of circumference branch motion in the sealed intracavity. However, when the steam flow moves circumferentially, the steam flow passes through the isolation groove at the isolation groove, thereby blocking the rotational flow of the steam flow. The steam flow can not form complete circumferential rotation, so that the disturbance of the component force of the steam flow in the vertical direction of the rotor displacement to the rotor is damaged, and the stability of a steam turbine shaft system is improved.
As a preferable scheme of the invention, the isolation grooves on the adjacent gland sealing teeth on the stator assembly are arranged in a staggered mode, and the isolation grooves on the adjacent gland sealing teeth on the rotor assembly are arranged in a staggered mode. The isolation grooves of the adjacent steam seal teeth on the stator assembly and the isolation grooves of the adjacent steam seal teeth on the rotor assembly are arranged in a staggered mode, and steam flow is prevented from leaking along the isolation grooves quickly.
As a preferable scheme of the invention, the plurality of isolation grooves on the steam seal tooth are uniformly arranged along the circumferential direction of the steam seal tooth. The isolation grooves are uniformly arranged, so that the steam flow is uniformly blocked by the rotary flow of each circumferential area, and the uniform acting force of the steam flow on the rotor in all directions is ensured.
As a preferable scheme of the invention, the number of the isolation grooves on the steam seal tooth is not less than two.
As a preferable scheme of the invention, the number of the isolation grooves on the steam seal tooth is six, and the six isolation grooves are uniformly distributed in the circumferential direction of the steam seal tooth.
As a preferable scheme of the invention, the shape of the gland sealing tooth is a pointed tooth shape or a flat tooth shape. The steam seal tooth structure forming the seal cavity can be any structure such as sharp teeth, flat teeth and the like.
In a preferred embodiment of the present invention, the isolation groove has a semicircular shape, a rectangular shape, or an elliptical shape. The shape of the isolation groove can be various shapes such as a semicircular shape, a rectangular shape, an oval shape and the like.
In a preferred embodiment of the present invention, the isolation trench has a rectangular shape, a height of 1.5mm, and a width of 5mm.
In a preferred embodiment of the present invention, the stator assembly includes a stationary blade holding ring, a plurality of stationary blades are connected to the stationary blade holding ring, the rotor assembly includes a rotor, the stationary blade holding ring is fitted to the outside of the rotor, a plurality of movable blades are connected to the rotor, the plurality of stationary blades and the plurality of movable blades are alternately arranged, and the comb seal structure is located between the movable blades and the stationary blade holding ring and between the stationary blades and the rotor.
As a preferable scheme of the invention, the stator assembly comprises a steam seal body, a plurality of steam seal rings are connected in the steam seal body, the rotor assembly comprises a rotor, the steam seal body is sleeved outside the rotor, and the comb tooth sealing structure is positioned between the steam seal rings and the rotor.
The invention has the beneficial effects that:
the steam seal tooth is provided with the plurality of isolation grooves, so that when steam flows to the isolation grooves, the steam flows pass through the isolation grooves, and the rotary flow of the steam is blocked. The steam flow can not form complete circumferential rotation, so that the disturbance of the component force of the steam flow in the vertical direction of the rotor displacement to the rotor is damaged, and the stability of a steam turbine shafting is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in example 1;
FIG. 2 is a schematic view of the structure of the present invention in example 2;
FIG. 3 is a schematic view of the gland teeth and isolation grooves.
In the figure: 1-a rotor assembly; 2-a stator component; 3-steam seal teeth; 11-a rotor; 12-a moving blade; 21-a stationary blade carrier ring; 22-a stationary blade; 23-a gland sealing body; 24-steam sealing ring; 31-isolation trenches.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Example 1:
as shown in fig. 1 and 3, the rotary power generating equipment with an isolated steam seal structure according to the present embodiment includes a stationary blade ring 21, a plurality of stationary blades 22 are connected to the stationary blade ring 21, a rotor 11 is sleeved in the stationary blade ring 21, a plurality of movable blades 12 are connected to the rotor 11, the plurality of stationary blades 22 and the plurality of movable blades 12 are alternately arranged, and a comb seal structure is provided between each of the movable blades 12 and the stationary blade ring 21 and between each of the stationary blades 22 and the rotor 11. Specifically, the stationary blade ring 21 is provided with seal teeth 3 corresponding to the regions of the moving blades 12, and the rotor 11 is provided with seal teeth 3 corresponding to the regions of the stationary blades 22, thereby forming a comb seal structure. The gland sealing teeth 3 are provided with a plurality of isolation grooves 31.
The steam flow leaks along the axial in the sealed chamber of broach vapor seal structure to under rotor 11 rotational friction drives, the steam flow has the trend of circumference branch motion in the sealed chamber. However, when the steam flow moves circumferentially, the steam flow passes through the separation groove 31 at the separation groove 31, thereby blocking the rotational flow of the steam flow. The steam flow cannot form complete circumferential rotation, so that the disturbance of the component force of the steam flow in the direction perpendicular to the displacement of the rotor 11 on the rotor 11 is damaged, and the stability of the steam turbine shaft system is improved.
Further, the isolation grooves 31 of the adjacent gland teeth 3 on the stationary blade carrier ring 21 are arranged in a staggered manner, and the isolation grooves 31 of the adjacent gland teeth 3 on the rotor 11 are arranged in a staggered manner. The isolation grooves 31 on the adjacent gland sealing teeth 3 on the same element are arranged in a staggered mode, and therefore the steam flow is prevented from leaking along the isolation grooves 31 quickly.
The isolating grooves 31 on the steam seal tooth 3 are uniformly arranged along the circumferential direction of the steam seal tooth 3. The isolation grooves 31 are uniformly arranged, so that the steam flow is uniformly blocked by the rotating flow of each circumferential area, and the acting force of the steam flow on the rotor 11 in all directions is uniform. The number of the isolation grooves 31 on the steam seal tooth 3 is not less than two, the number of the isolation grooves 31 on the steam seal tooth 3 in the embodiment is six, and the six isolation grooves 31 are uniformly distributed in the circumferential direction of the steam seal tooth 3.
The steam seal teeth 3 forming the sealed chamber can be any structure such as sharp teeth and flat teeth. The shape of the isolation groove 31 may be various shapes such as a semicircular shape, a rectangular shape, and an elliptical shape. In this embodiment, the isolation groove 31 is rectangular, the height of the isolation groove 31 is 1.5mm, and the width of the isolation groove 31 is 5mm.
Example 2:
as shown in fig. 2 and 3, the rotary power generating equipment with the isolated steam seal structure of the present embodiment includes a steam seal body 23, a plurality of steam seal rings 24 are connected in the steam seal body 23, a rotor 11 is sleeved in the steam seal body 23, and comb tooth sealing structures are disposed between the steam seal rings 24 and the rotor 11. Specifically, the area of the rotor 11 corresponding to the steam seal ring 24 is provided with steam seal teeth 3, the steam seal ring 24 is provided with the steam seal teeth 3, and in most areas, the steam seal teeth 3 on the rotor 11 and the steam seal teeth 3 on the steam seal ring 24 are alternately arranged. The gland sealing teeth 3 are provided with a plurality of isolation grooves 31.
The steam flow leaks along the axial in the sealed chamber of broach vapor seal structure to under rotor 11 rotational friction drives, the steam flow has the trend of circumference branch motion in the sealed chamber. However, when the steam flow moves circumferentially, the steam flow passes through the separation groove 31 at the separation groove 31, thereby blocking the rotational flow of the steam flow. The steam flow cannot form complete circumferential rotation, so that the disturbance of the component force of the steam flow in the direction perpendicular to the displacement of the rotor 11 on the rotor 11 is damaged, and the stability of the steam turbine shaft system is improved.
Further, the isolation grooves 31 on the adjacent gland teeth 3 on the gland ring 24 are arranged in a staggered manner, and the isolation grooves 31 on the adjacent gland teeth 3 on the rotor 11 are arranged in a staggered manner. The isolation grooves 31 on the adjacent gland teeth 3 on the same element are arranged in a staggered mode, and therefore steam flow is prevented from leaking along the isolation grooves 31 relatively quickly.
The isolating grooves 31 on the steam seal tooth 3 are uniformly arranged along the circumferential direction of the steam seal tooth 3. The isolation grooves 31 are uniformly arranged, so that the steam flow is uniformly blocked by the rotating flow of each circumferential area, and the uniform acting force of the steam flow on the rotor 11 in all directions is ensured. The number of the isolation grooves 31 on the steam seal tooth 3 is six, and the six isolation grooves 31 are uniformly distributed in the circumferential direction of the steam seal tooth 3.
The steam seal teeth 3 forming the sealed chamber can be any structure such as sharp teeth and flat teeth. The shape of the isolation groove 31 may be various shapes such as a semicircular shape, a rectangular shape, and an elliptical shape. In this embodiment, the isolation groove 31 is rectangular, the height of the isolation groove 31 is 1.5mm, and the width of the isolation groove 31 is 5mm.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. The utility model provides a rotatory power generation facility with keep apart vapor seal structure which characterized in that: the comb tooth sealing structure comprises a rotor component (1), wherein a stator component (2) is sleeved outside the rotor component (1), and a plurality of steam seal teeth (3) are arranged between the stator component (2) and the rotor component (1) to form a comb tooth sealing structure; the steam seal tooth (3) is provided with a plurality of isolation grooves (31).
2. A rotary power unit with an isolated gland seal according to claim 1, wherein: the steam seal structure is characterized in that the isolation grooves (31) on the adjacent steam seal teeth (3) on the stator assembly (2) are arranged in a staggered mode, and the isolation grooves (31) on the adjacent steam seal teeth (3) on the rotor assembly (1) are arranged in a staggered mode.
3. A rotary power unit with an isolated gland seal according to claim 1, wherein: and a plurality of isolation grooves (31) on the steam seal teeth (3) are uniformly arranged along the circumferential direction of the steam seal teeth (3).
4. A rotary power unit with an isolated gland seal according to claim 1, wherein: the number of the isolation grooves (31) on the steam seal tooth (3) is not less than two.
5. A rotary power unit with an isolated gland seal according to claim 1, wherein: the number of the isolation grooves (31) on the steam seal tooth (3) is six, and the six isolation grooves (31) are uniformly distributed in the circumferential direction of the steam seal tooth (3).
6. A rotary power unit with an isolated gland seal according to claim 1, wherein: the steam seal teeth (3) are in a sharp tooth shape or a flat tooth shape.
7. A rotary power unit with an isolated gland seal according to claim 1, wherein: the shape of the isolation groove (31) is semicircular or rectangular or oval.
8. A rotary power unit with an isolated gland seal according to claim 1, wherein: the shape of isolation groove (31) is the rectangle, and the height of isolation groove (31) is 1.5mm, and the width of isolation groove (31) is 5mm.
9. A rotary power unit with an isolated gland seal according to claim 1, wherein: stator module (2) are including quiet leaf holding ring (21), quiet leaf holding ring (21) in-connection has a plurality of quiet leaf (22), rotor subassembly (1) is including rotor (11), outside rotor (11) were located to quiet leaf holding ring (21) cover, is connected with a plurality of movable vane (12) on rotor (11), a plurality of quiet leaf (22) and a plurality of movable vane (12) set up in turn, broach seal structure is located between movable vane (12) and quiet leaf holding ring (21), between quiet leaf (22) and rotor (11).
10. A rotary power unit with an isolated gland seal according to claim 1, wherein: stator module (2) are including gland casing (23), and a plurality of gland casings (24) are connected in gland casing (23), and rotor subassembly (1) is including rotor (11), and outside rotor (11) were located to gland casing (23) cover, broach seal structure was located between gland casing (24) and rotor (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987765.3A CN115163213B (en) | 2022-08-17 | 2022-08-17 | Rotary power generation equipment with isolation steam seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987765.3A CN115163213B (en) | 2022-08-17 | 2022-08-17 | Rotary power generation equipment with isolation steam seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115163213A true CN115163213A (en) | 2022-10-11 |
| CN115163213B CN115163213B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210987765.3A Active CN115163213B (en) | 2022-08-17 | 2022-08-17 | Rotary power generation equipment with isolation steam seal structure |
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| Country | Link |
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| CN (1) | CN115163213B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040239040A1 (en) * | 2003-05-29 | 2004-12-02 | Burdgick Steven Sebastian | Nozzle interstage seal for steam turbines |
| US20050067789A1 (en) * | 2003-09-26 | 2005-03-31 | Siemens Westinghouse Power Corporation | Flow dam design for labyrinth seals to promote rotor stability |
| US20140072415A1 (en) * | 2012-09-11 | 2014-03-13 | General Electric Company | Swirl interruption seal teeth for seal assembly |
| CN106949245A (en) * | 2017-03-07 | 2017-07-14 | 西安交通大学 | It is a kind of from spin-ended convergence type rotary seal structure |
| CN107314114A (en) * | 2017-08-15 | 2017-11-03 | 沈阳航空航天大学 | A kind of comb tooth sealing structure |
| CN108331783A (en) * | 2018-02-24 | 2018-07-27 | 西安交通大学 | A kind of orthotropy rotary seal structure |
| CN108757055A (en) * | 2018-05-24 | 2018-11-06 | 西安交通大学 | A kind of labyrinth seal structure with brush seal item |
| CN109322710A (en) * | 2018-10-22 | 2019-02-12 | 哈尔滨工程大学 | A kind of inclined ellipse pocket sealing structure adapting to rotor eddy |
| CN209324437U (en) * | 2018-11-09 | 2019-08-30 | 杭州汽轮机股份有限公司 | A kind of steam turbine shaft end combination sealing gland |
| CN110242360A (en) * | 2018-03-08 | 2019-09-17 | 三菱重工业株式会社 | Movable vane piece side-sealing device, stator blade side-sealing device and rotating machinery |
| CN113154047A (en) * | 2021-04-30 | 2021-07-23 | 西安交通大学 | Self-rotation-stopping labyrinth seal based on addendum winglet structure and processing method thereof |
| CN114183532A (en) * | 2021-11-25 | 2022-03-15 | 沈阳鼓风机集团股份有限公司 | Sealing structure of turbine and turbine |
-
2022
- 2022-08-17 CN CN202210987765.3A patent/CN115163213B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040239040A1 (en) * | 2003-05-29 | 2004-12-02 | Burdgick Steven Sebastian | Nozzle interstage seal for steam turbines |
| US20050067789A1 (en) * | 2003-09-26 | 2005-03-31 | Siemens Westinghouse Power Corporation | Flow dam design for labyrinth seals to promote rotor stability |
| US20140072415A1 (en) * | 2012-09-11 | 2014-03-13 | General Electric Company | Swirl interruption seal teeth for seal assembly |
| CN106949245A (en) * | 2017-03-07 | 2017-07-14 | 西安交通大学 | It is a kind of from spin-ended convergence type rotary seal structure |
| CN107314114A (en) * | 2017-08-15 | 2017-11-03 | 沈阳航空航天大学 | A kind of comb tooth sealing structure |
| CN108331783A (en) * | 2018-02-24 | 2018-07-27 | 西安交通大学 | A kind of orthotropy rotary seal structure |
| CN110242360A (en) * | 2018-03-08 | 2019-09-17 | 三菱重工业株式会社 | Movable vane piece side-sealing device, stator blade side-sealing device and rotating machinery |
| CN108757055A (en) * | 2018-05-24 | 2018-11-06 | 西安交通大学 | A kind of labyrinth seal structure with brush seal item |
| CN109322710A (en) * | 2018-10-22 | 2019-02-12 | 哈尔滨工程大学 | A kind of inclined ellipse pocket sealing structure adapting to rotor eddy |
| CN209324437U (en) * | 2018-11-09 | 2019-08-30 | 杭州汽轮机股份有限公司 | A kind of steam turbine shaft end combination sealing gland |
| CN113154047A (en) * | 2021-04-30 | 2021-07-23 | 西安交通大学 | Self-rotation-stopping labyrinth seal based on addendum winglet structure and processing method thereof |
| CN114183532A (en) * | 2021-11-25 | 2022-03-15 | 沈阳鼓风机集团股份有限公司 | Sealing structure of turbine and turbine |
Non-Patent Citations (1)
| Title |
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| 曹丽华;李盼;司和勇;胡鹏飞;: "汽轮机叶顶汽封间隙内的流动形态分析", 工程热物理学报, no. 02, 15 February 2020 (2020-02-15), pages 299 - 306 * |
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| Publication number | Publication date |
|---|---|
| CN115163213B (en) | 2024-06-11 |
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