CN100378296C - High-pressure inner cylinder cooling method for steam turbine - Google Patents
High-pressure inner cylinder cooling method for steam turbine Download PDFInfo
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- CN100378296C CN100378296C CNB2006100291074A CN200610029107A CN100378296C CN 100378296 C CN100378296 C CN 100378296C CN B2006100291074 A CNB2006100291074 A CN B2006100291074A CN 200610029107 A CN200610029107 A CN 200610029107A CN 100378296 C CN100378296 C CN 100378296C
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Abstract
The invention relates to a method for cooling the high-pressure inner cylinder of turbine, wherein said method is characterized in that: combining the back of inner cylinder, the high-pressure balance piston and middle-pressure balance piston into one combiner; said combiner has the hole channels that alternated; and the part of steam flow B is guided via said hole channel to be divided into two parts while one part is throttled and enter into high-pressure steam flow B1, while another part of steam flow B2 via throttled, is mixed with the high-temperature high-pressure steam flow A leaked by adjuster, to form the steam flow C, via another hole channel, to enter into another hole channel to power. The invention can reduce the working temperature of inner cylinder, to improve its sealing property and improve the service life of its bolt.
Description
(1) technical field
The present invention relates to a kind of High Pressure Inner Cylinder of Steam Turbine cooling technology.
(2) background technique
The high power turbine unit high-pressure cylinder part of domestic production at present generally adopts the mode of structure of hp outer cylinder 1+ high-pressure inner cylinder 2+ nozzle sets 3+ governing stage 4, its structure as shown in Figure 1 and Figure 2, the high temperature and high pressure steam stream A that leaks behind the governing stage is behind high pressure side equalizing piston 5, a part imports medium pressure steam stream A1 through medium voltage side equalizing piston 6 again, and another part then imports high pressure steam discharge stream A2 through the high-pressure inner cylinder outer surface.24.2Mpa/566 ℃ like this/566 ℃ interior high-pressure inner cylinder 2 outer surfaces of supercritical unit will flow through the steam of higher temperature, be 3.97MPa in parameter under declared working condition promptly, 445.10 ℃; The operating temperature of flange bolt 7 is higher, and the material resistance to high temperature of flange bolt has been proposed higher requirement.
Along with the steam inlet condition of steam turbine set reaches ultra supercritical, problems such as the bolt seal of hot strength and high-pressure inner cylinder, bolt strength become increasingly conspicuous under the high-pressure inner cylinder creep temperature of 25Mpa/600 ℃/600 ℃ of ultra supercritical units, and the operating temperature that how to reduce high-pressure inner cylinder becomes the key that solves bolt seal and bolt strength.
(3) summary of the invention
The object of the present invention is to provide a kind of High-pressure inner cylinder cooling method for steam turbine, this cooling means can reduce the high-pressure inner cylinder operating temperature preferably, thereby prolongs the working bolt life-span of high-pressure inner cylinder.
The present invention is achieved in that a kind of High-pressure inner cylinder cooling method for steam turbine, it is characterized in that: with high-pressure inner cylinder rear portion and high pressure side equalizing piston, the medium voltage side equalizing piston merges into a single whole, on the merging body, have the duct that intersection staggers, after merging the high row of the duct introducing part vapor stream B on the body, high row's vapor stream B is divided into two-part: a part directly imports medium pressure steam stream B1 after the packing throttling, another part vapor stream B2 is after the packing throttling, after the high temperature and high pressure steam stream A that leaks behind the governing stage mixed, formation vapor stream C compressed into vapour again and does work together in another duct of merging body imports.
The present invention is by existing high-pressure inner cylinder rear portion, high pressure side equalizing piston and medium voltage side equalizing piston are merged into a single whole, on the merging body, have the duct that intersection staggers, introduce the high row of part steam through the duct that merges on the body, and the high temperature and high pressure steam that leaks behind change governing stage trend and be introduced in compress into the steam ports work done, what make that the high-pressure inner cylinder flange surface flows through is high row's steam, the pressure and temperature of high row's steam is lower, thereby improve the working environment of high-pressure inner cylinder bolt, improve the sealing of high-pressure inner cylinder, prolong the life-span of high-pressure inner cylinder bolt.
(4) description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is existing steam turbine set high-pressure cylinder part sectional arrangement drawing;
Fig. 2 be among Fig. 1 A-A to sectional view;
Fig. 3 is the high-pressure cylinder part sectional arrangement drawing of High-pressure inner cylinder cooling method for steam turbine of the present invention
Fig. 4 be among Fig. 3 B-B to sectional view.
Among the figure: 1 hp outer cylinder, 2 high-pressure inner cylinders, 3 nozzle sets, 4 governing stages, 5 high pressure side equalizing pistons, 6 medium voltage side equalizing pistons, 7 high-pressure inner cylinder flange bolts, 8 high-pressure inner cylinders merge body, have the duct on the 81 merging bodies, and 82 merge another duct on the bodies.The admission of M main steam, the admission of N medium pressure steam, L rotor centerline.
(5) embodiment
Referring to Fig. 3, Fig. 4, a kind of High-pressure inner cylinder cooling method for steam turbine, be that high-pressure inner cylinder rear portion and high pressure side equalizing piston, the medium voltage side equalizing piston back that merges into a single whole is formed high-pressure inner cylinder and merges body, on the merging body, have the duct that intersection staggers, one duct, 81 openings are facing to outer shell interlayer in the high pressure, another duct 82 openings are opened in the governing stage rear end, and compress into the vapor inlet end in leading to.After merging the high row of the duct 81 introducing parts vapor stream B on the body, high row's vapor stream B is divided into two-part: a part directly imports medium pressure steam stream B1 after the packing throttling, another part vapor stream B2 is after the packing throttling, after the high temperature and high pressure steam stream A of governing stage 4 back leakages mixed, formation vapor stream C compressed into vapour again and does work together in another duct 82 of merging body 8 imports.
High-pressure inner cylinder 2 flange surface no longer flow through governing stage 4 back high temperature wiredrawn steams like this, but high row's steam, the pressure and temperature of high row's steam is lower, as 24.2Mpa/566 ℃/566 ℃ supercritical units high row's steam parameter under declared working condition is 3.97MPa, 300.6 ℃, thereby reduced the operating temperature of bolt 7, prolonged the life-span of high-pressure inner cylinder bolt 7; And utilize merging body 8, and can improve the high-pressure cylinder whole rigidity, by adjacent bolt, make that the sealability of high-pressure inner cylinder 2 is well improved.
After hp outer cylinder 1 interlayer adopts high row's cooling, the working environment of whole high-pressure cylinder part is all obtained good improvement, will help the selection, form structure design of hp outer cylinder 1 etc.
The present invention is not only applicable to the high-pressure cylinder in the supercritical steam turbine unit, and is applicable to the supercritical turbine group.
Claims (1)
1. High-pressure inner cylinder cooling method for steam turbine, it is characterized in that: with high-pressure inner cylinder rear portion and high pressure side equalizing piston, the medium voltage side equalizing piston merges into a single whole, on the merging body, have the duct that intersection staggers, after merging the duct introducing part high row vapor stream (B) on the body, high row's vapor stream (B) is divided into two-part: a part directly imports medium pressure steam stream (B1) after the packing throttling, another part vapor stream (B2) is after the packing throttling, after the high temperature and high pressure steam stream (A) that leaks behind the governing stage mixed, formation vapor stream (C) was compressed into vapour again and is done work together in another duct of merging body imports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100291074A CN100378296C (en) | 2006-07-19 | 2006-07-19 | High-pressure inner cylinder cooling method for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100291074A CN100378296C (en) | 2006-07-19 | 2006-07-19 | High-pressure inner cylinder cooling method for steam turbine |
Publications (2)
| Publication Number | Publication Date |
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| CN1920263A CN1920263A (en) | 2007-02-28 |
| CN100378296C true CN100378296C (en) | 2008-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100291074A Active CN100378296C (en) | 2006-07-19 | 2006-07-19 | High-pressure inner cylinder cooling method for steam turbine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8047763B2 (en) * | 2008-10-30 | 2011-11-01 | General Electric Company | Asymmetrical gas turbine cooling port locations |
| EP2565419A1 (en) * | 2011-08-30 | 2013-03-06 | Siemens Aktiengesellschaft | Flow machine cooling |
| CN103883360A (en) * | 2014-03-26 | 2014-06-25 | 哈尔滨汽轮机厂有限责任公司 | Medium-voltage rotor cooling method of large-capacity reheating turbine |
| CN106194284B (en) * | 2016-07-22 | 2017-07-28 | 东方电气集团东方汽轮机有限公司 | A kind of method of the parameter adjustment of steam turbine jacket steam and operation |
| CN109184823B (en) * | 2018-11-06 | 2024-03-19 | 上海电气电站设备有限公司 | Steam turbine with steam supplementing structure and operation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294251A (en) * | 1999-10-29 | 2001-05-09 | 三菱重工业株式会社 | Steam turbine with improved outer shell cooling system |
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2006
- 2006-07-19 CN CNB2006100291074A patent/CN100378296C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294251A (en) * | 1999-10-29 | 2001-05-09 | 三菱重工业株式会社 | Steam turbine with improved outer shell cooling system |
Non-Patent Citations (1)
| Title |
|---|
| 某引进型600MW汽轮机高压外缸温差过大现象的剖析. 孙勇，程辉科，王静明.广东电力，第17卷第4期. 2004 * |
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| CN1920263A (en) | 2007-02-28 |
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Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
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Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District Patentee before: Shanghai Steam Turbine Co., Ltd. |