CN107725119B - Nested vapor seal balance structure of high-pressure chamber - Google Patents
Nested vapor seal balance structure of high-pressure chamber Download PDFInfo
- Publication number
- CN107725119B CN107725119B CN201711276233.4A CN201711276233A CN107725119B CN 107725119 B CN107725119 B CN 107725119B CN 201711276233 A CN201711276233 A CN 201711276233A CN 107725119 B CN107725119 B CN 107725119B
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- China
- Prior art keywords
- hole
- steam
- inlet chamber
- steam inlet
- reversing
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Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000007791 dehumidification Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
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- 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
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
-
- 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
- F01D15/02—Adaptations for driving vehicles, e.g. locomotives
- F01D15/04—Adaptations for driving vehicles, e.g. locomotives the vehicles being waterborne vessels
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to the technical field of turbine equipment, and particularly relates to a nested vapor seal balance structure of a high-pressure chamber, which comprises a sleeve and a blocking plate; a waist-shaped hole is processed on the outer wall of the reversing steam inlet chamber, and a hole is processed on the inner wall of the steam inlet chamber; the sleeve is embedded into holes penetrating the inner cavity wall and the outer cavity wall of the reversing steam inlet chamber and welded on the cavity walls; the blocking plate is welded in the kidney-shaped hole; the waist-shaped hole is larger than the hole, so that the plugging plate can be welded through the hole; the plug is provided with a hole with the same diameter as the hole. The nested steam seal balance structure penetrating through the high-pressure steam clamping cavity axially opens a baffle at the lower half of the cylinder by utilizing the reversing steam inlet chamber, penetrates through the inner and outer cavity walls of the reversing steam inlet chamber, is embedded into a sleeve, and realizes pressure balance between the middle steam seal and the dehumidification stage through an external connecting pipe. The efficiency of the steam turbine is improved, the axial dimension problem of the steam turbine is reduced, the structural design is reasonable, the efficiency is improved, the cost is low, and the large-scale popularization and the large-scale use are easy.
Description
Technical Field
The invention belongs to the technical field of steam turbine equipment, and particularly relates to a nested steam seal balance structure of a high-pressure chamber.
Background
Because of the requirement of forward and backward performance, the marine steam turbine usually adopts a double-cylinder structure, a high-pressure steam turbine and a low-pressure steam turbine, and a backward cylinder and a low-pressure cylinder are coaxially arranged. The single-cylinder turbine is a new technology in the design of the marine turbine, and the (high-low pressure) front car cylinder and the back car cylinder are integrated, so that the structure of the turbine is simplified in a breakthrough manner, and the design difficulty is greatly increased. The two high-pressure steam inlet chambers in forward and reverse directions are compact in adjacent structural form, and the primary consideration is that the steam leakage of the middle steam seal between the two high-pressure chambers greatly influences the efficiency of the steam turbine, so that the total design of the middle steam seal is very critical. The method reduces the steam leakage of the intermediate steam seal, selects an excellent steam seal tooth structure, increases the number of the steam seal teeth, and is a common design means, but increases the bearing span and the axial dimension of the steam turbine, thereby greatly reducing the advantages of simplified external dimension and small size of the single-cylinder steam turbine structure. Aiming at the situation, a design concept of pressure balance between the middle steam seal and the dehumidification stage is provided, and the two chambers are communicated through the external guide pipe, so that the high-quality middle steam seal is utilized to leak steam, the number of teeth of the middle steam seal is reduced, and the steam seal of the steam turbine is effectively shortened. But the front and back cylinder closing structure is compact and complex, the middle vapor seal chamber is overlapped in the front vehicle nozzle chamber, the middle vapor seal punching hole is required to pass through the front vehicle nozzle chamber with high temperature and high pressure, and the front vehicle nozzle chamber has no design structure similar to maturity and availability.
Disclosure of Invention
The invention overcomes and improves the defects of the prior art, and provides a nested gland balance structure penetrating through a high-pressure steam inlet clamping cavity, so as to solve the problems of middle gland leakage utilization and reduced gland teeth number in the new technology of the single-cylinder steam turbine, thereby improving the efficiency of the steam turbine and reducing the axial dimension of the steam turbine. The structure design is reasonable, the efficiency is improved, the cost is low, and the large-scale popularization and use are easy.
The invention adopts the technical scheme that: a nested vapor seal balance structure of a high-pressure chamber comprises a sleeve and a blocking plate; a waist-shaped hole is formed in the outer wall of the reversing steam inlet chamber, and a second hole is formed in the inner wall of the steam inlet chamber.
Further, the sleeve is embedded into a waist-shaped hole and a second hole penetrating through the inner cavity wall and the outer cavity wall of the reversing steam inlet chamber and welded on the cavity wall.
Further, the blocking plate is welded in the kidney-shaped hole.
Further, the kidney-shaped hole is larger than the second hole, so that the plugging plate can be welded through the second hole.
Further, the blocking plate is provided with a hole with the same diameter as the second hole.
The invention has the beneficial effects that: the nested steam seal balance structure is used for solving the problems of improving the efficiency of the steam turbine and reducing the axial size of the steam turbine due to the utilization of middle steam seal leakage and the reduction of the number of teeth of the steam seal in the new technology of the single-cylinder steam turbine. The structure design is reasonable, the efficiency is improved, the cost is low, and the large-scale popularization and use are easy. The middle steam seal is designed into 2 sections, the 1 st section 3 groups of steam seals are arranged on the part of a front steam inlet chamber, the nozzle of the front steam seal enters into reversing, the second section 1 groups of steam seals are arranged on the part of the reversing steam inlet chamber, the nozzle of the reversing steam seal enters into the front steam seal, and the nested steam seal balance structure is arranged between the two sections of steam seals; the lower half of the cylinder is axially blocked by the reversing steam inlet chamber, penetrates through the inner cavity wall and the outer cavity wall of the reversing steam inlet chamber, is embedded into the sleeve, and realizes pressure balance between the middle steam seal and the dehumidification stage through the external connecting pipe.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of J-J of FIG. 1;
FIG. 3 is a schematic view of the structure of the holes in the inner wall of the steam inlet chamber;
fig. 4 is a schematic view of the structure of the kidney-shaped hole.
Detailed Description
Referring to the figures, a nested vapor seal balance structure of a high-pressure chamber comprises a sleeve 1 and a blocking plate 2; a waist-shaped hole 3 is processed on the outer wall of the reversing steam inlet chamber, and a second hole 4 is processed on the inner wall of the steam inlet chamber; the sleeve 1 is embedded into a waist-shaped hole and a second hole penetrating through two layers of cavity walls inside and outside the reversing steam inlet chamber and welded on the cavity walls; the blocking plate 2 is welded in the kidney-shaped hole 3; the kidney-shaped hole 3 is larger than the second hole 4, so that the plugging plate 2 can be welded through the second hole 4; the closure plate 2 is provided with a hole with the same diameter as the second hole 4.
The nested vapor seal balance structure of the high-pressure chamber comprises a perforated structure design of the inner wall and the outer wall of the reversing inlet vapor of the cylinder, a sleeve 1, a blocking plate 2 and a welding design. The perforation design scheme is as follows: the waist-shaped hole 3 is processed on the outer wall of the reversing steam inlet chamber, the waist-shaped hole 3 is also used as a sand removing hole of the inner cavity of the steam inlet chamber, the second hole 4 and the welding seam are processed on the inner wall of the steam inlet chamber, so that the waist-shaped hole 3 is larger than the second hole 4, and the smooth welding of the blocking plate 2 through the second hole 4 is ensured; the diameter of the opening of the blocking plate 2 is the same as that of the second hole 4, and double-sided welding seams are formed; after rough machining, shi Hanjian is plugged with the plate 2, and the sleeve 1 is welded, so that the embedded vapor seal balance structure is realized. Through nondestructive inspection of welding seams and post-finishing hydrostatic test, the novel nested steam seal balance structure is proved to have good tightness and is feasible.
The technical solutions in the embodiments are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Claims (1)
1. The utility model provides a nested vapor seal balance structure of high pressure cavity which characterized in that: the balance structure comprises a sleeve (1) and a blocking plate (2); a waist-shaped hole (3) is processed on the outer wall of the reversing steam inlet chamber, and a second hole (4) is processed on the inner wall of the steam inlet chamber; the sleeve (1) is embedded into a waist-shaped hole and a second hole penetrating through two layers of cavity walls inside and outside the reversing steam inlet chamber and welded on the cavity walls; the blocking plate (2) is welded in the kidney-shaped hole (3); the waist-shaped hole (3) is larger than the second hole (4), so that the plugging plate (2) can be welded through the second hole (4); the blocking plate (2) is provided with a hole with the same diameter as the second hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276233.4A CN107725119B (en) | 2017-12-06 | 2017-12-06 | Nested vapor seal balance structure of high-pressure chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276233.4A CN107725119B (en) | 2017-12-06 | 2017-12-06 | Nested vapor seal balance structure of high-pressure chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725119A CN107725119A (en) | 2018-02-23 |
| CN107725119B true CN107725119B (en) | 2024-01-12 |
Family
ID=61220951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711276233.4A Active CN107725119B (en) | 2017-12-06 | 2017-12-06 | Nested vapor seal balance structure of high-pressure chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725119B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB367770A (en) * | 1930-10-13 | 1932-02-15 | Charles Algernon Parsons | Improvements in and relating to turbines |
| DE634368C (en) * | 1931-06-05 | 1936-08-25 | Asea Ab | Steam or gas turbine |
| US3832087A (en) * | 1972-10-20 | 1974-08-27 | Stal Laval Turbin Ab | Axial turbine combined with reverse turbine |
| US3906730A (en) * | 1972-10-11 | 1975-09-23 | Bbc Brown Boveri & Cie | Labyrinth seal with blocking medium |
| GB1514186A (en) * | 1974-10-08 | 1978-06-14 | Stal Laval Turbin Ab | Marine turbine |
| SU1138526A1 (en) * | 1983-09-06 | 1985-02-07 | Харьковский Филиал Центрального Конструкторского Бюро Главэнергоремонта | Combined high- and medium-pressure cylinder |
| CN86106925A (en) * | 1985-10-23 | 1987-05-13 | 西屋电气公司 | Steam turbine high voltage terminal balancing orifice and sealing system |
| JPH0518205A (en) * | 1991-07-15 | 1993-01-26 | Fuji Electric Co Ltd | Steam turbine |
| CN201671660U (en) * | 2010-05-06 | 2010-12-15 | 中国长江动力公司(集团) | Steam turbine with steam extraction being changed into back pressure type |
| JP2013185494A (en) * | 2012-03-08 | 2013-09-19 | Mitsubishi Heavy Ind Ltd | Steam turbine including steam sealing function and moisture removing function |
| CN203374324U (en) * | 2013-05-24 | 2014-01-01 | 华电国际电力股份有限公司山东分公司 | Low-pressure circulating component |
| CN203835469U (en) * | 2014-05-23 | 2014-09-17 | 国网山西省电力公司电力科学研究院 | Turbine low-pressure shaft seal steam supply system |
| CN105201568A (en) * | 2015-10-15 | 2015-12-30 | 哈尔滨汽轮机厂有限责任公司 | Low-pressure steam turboset with 360-degree volute casing admission low-pressure inner cylinder |
| JP2017150332A (en) * | 2016-02-22 | 2017-08-31 | 三菱重工業株式会社 | Turbine gland steam supply system and its application method |
| RU2636965C1 (en) * | 2016-10-31 | 2017-11-29 | Публичное акционерное общество "Научно-производственное объединение "Сатурн" | Reversing turbine stage |
| CN207499911U (en) * | 2017-12-06 | 2018-06-15 | 中国船舶重工集团公司第七0三研究所 | A kind of nested type packing balanced structure of high-pressure chamber |
-
2017
- 2017-12-06 CN CN201711276233.4A patent/CN107725119B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB367770A (en) * | 1930-10-13 | 1932-02-15 | Charles Algernon Parsons | Improvements in and relating to turbines |
| DE634368C (en) * | 1931-06-05 | 1936-08-25 | Asea Ab | Steam or gas turbine |
| US3906730A (en) * | 1972-10-11 | 1975-09-23 | Bbc Brown Boveri & Cie | Labyrinth seal with blocking medium |
| US3832087A (en) * | 1972-10-20 | 1974-08-27 | Stal Laval Turbin Ab | Axial turbine combined with reverse turbine |
| GB1514186A (en) * | 1974-10-08 | 1978-06-14 | Stal Laval Turbin Ab | Marine turbine |
| SU1138526A1 (en) * | 1983-09-06 | 1985-02-07 | Харьковский Филиал Центрального Конструкторского Бюро Главэнергоремонта | Combined high- and medium-pressure cylinder |
| CN86106925A (en) * | 1985-10-23 | 1987-05-13 | 西屋电气公司 | Steam turbine high voltage terminal balancing orifice and sealing system |
| JPH0518205A (en) * | 1991-07-15 | 1993-01-26 | Fuji Electric Co Ltd | Steam turbine |
| CN201671660U (en) * | 2010-05-06 | 2010-12-15 | 中国长江动力公司(集团) | Steam turbine with steam extraction being changed into back pressure type |
| JP2013185494A (en) * | 2012-03-08 | 2013-09-19 | Mitsubishi Heavy Ind Ltd | Steam turbine including steam sealing function and moisture removing function |
| CN203374324U (en) * | 2013-05-24 | 2014-01-01 | 华电国际电力股份有限公司山东分公司 | Low-pressure circulating component |
| CN203835469U (en) * | 2014-05-23 | 2014-09-17 | 国网山西省电力公司电力科学研究院 | Turbine low-pressure shaft seal steam supply system |
| CN105201568A (en) * | 2015-10-15 | 2015-12-30 | 哈尔滨汽轮机厂有限责任公司 | Low-pressure steam turboset with 360-degree volute casing admission low-pressure inner cylinder |
| JP2017150332A (en) * | 2016-02-22 | 2017-08-31 | 三菱重工業株式会社 | Turbine gland steam supply system and its application method |
| RU2636965C1 (en) * | 2016-10-31 | 2017-11-29 | Публичное акционерное общество "Научно-производственное объединение "Сатурн" | Reversing turbine stage |
| CN207499911U (en) * | 2017-12-06 | 2018-06-15 | 中国船舶重工集团公司第七0三研究所 | A kind of nested type packing balanced structure of high-pressure chamber |
Non-Patent Citations (2)
| Title |
|---|
| Numerical Investigation of an Improved Gas and Steam Turbine Seal;M H Gordon; U M Kelkar;M C Johnson;Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy;210(6);第477-479页 * |
| 中间分隔轴封漏汽及中压缸效率计算方法;李刚;胥建群;曹祖庆;朱小令;;中国电机工程学报;30(26);第25-30页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107725119A (en) | 2018-02-23 |
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