CN105257343A - Split stationary blade of steam turbine having small crown structure and machining method thereof - Google Patents
Split stationary blade of steam turbine having small crown structure and machining method thereof Download PDFInfo
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- CN105257343A CN105257343A CN201510840733.0A CN201510840733A CN105257343A CN 105257343 A CN105257343 A CN 105257343A CN 201510840733 A CN201510840733 A CN 201510840733A CN 105257343 A CN105257343 A CN 105257343A
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- blade
- split
- steam turbine
- crown
- stator blade
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Abstract
The invention discloses a split stationary blade of a steam turbine having a small crown structure, which comprises a blade body, a top crown and a bottom crown. The split stationary blade is characterized in that the blade body is respectively machined off one part in a steam passage direction at the top crown and the bottom crown below a split cutting line, so that the part of the blade body dose no enter a molding hole. A machining method of the split stationary blade comprises the following steps: 1) the position of a horizontal split cutting line on the split stationary blade is found out, and is respectively underlined on the top crown and the bottom crown; 2) one part of the blade body is cut off in the steam passage direction in the underlined places of the top crown and the bottom crown; and the part of the blade body cannot enter the molding hole; and 3) it detects if the cutting is tidy and in place until the requirements are accorded with. The method prevents the complex flow of repair welding after local cutting in the shroud molding hole split area, and effectively saves the production cost for high-yield production of separation plates.
Description
Technical field
The present invention designs fixed blade of steam turbine diaphragm sheet, specifically a kind of steam turbine band coronule structure split stator blade and processing method thereof.
Background technique
Partition board of steam turbine produce in, usually for band coronule stator blade form leaf grating by being welded into whole circle with the nibs of interior shroud, peripheral band, then by leaf grating from split cut be divided into upper half-sum second, be beneficial to subsequent installation.The stator blade part being positioned at split leaf grating first, another part leaf grating second, in order to be divided into upper and lower half at leaf grating, two stator blades being positioned at the split left and right sides can separate with second shroud smoothly, need after inside and outside surrounding belt type hole machined is good, internal, peripheral band split place nibs carries out partial cut; After upper and lower half leaf grating separates, cutting zone that is internal, second split nibs place of peripheral band is needed to carry out repair welding, and respectively 3mm is processed from leaf top and blade root to steam passage side to split two stator blades, on such dividing plate second again by split connect into one overall time, the split stator blade of superior hemiseptum just can enter second smoothly.Above-mentioned exist the process that needs to carry out partial cut repair welding on inside and outside shroud in the process of segmentation split stator blade, result in the increase of production process.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, a kind of steam turbine band coronule structure split stator blade and processing method thereof are provided, this stator blade is used not need to carry out partial cut repair welding again at shroud split nibs place as conventional method, decrease production process, improve working efficiency.
Realizing technological scheme of the present invention is: a kind of steam turbine band coronule structure split stator blade, comprise blade, apical cap and end hat, it is characterized in that: described blade machines away a part at apical cap and end Guan Chu respectively to steam passage direction according to below split cutting lines, make this part blade not enter nibs.
Described blade machines away part and is no more than 1/4th of blade length.
It is 3mm that described blade machines away partial width.
A processing method for above-mentioned steam turbine band coronule structure split stator blade, comprises the steps,
1) find horizontal flange cutting lines in the position of split stator blade; And respectively in apical cap and hat this position of underlining, the end;
2) along steam passage direction, blade is cut away a part at apical cap and end hat line place respectively, make this part blade just not enter nibs;
3) check whether cutting neatly puts in place, until meet the requirements.
The invention has the beneficial effects as follows:
1, because split stator blade of the present invention machines away blade 3mm from apical cap and end Guan Chu respectively to steam passage direction according to split cutting lines in advance, thus can separate smoothly along split after making stator blade and inside and outside shroud carry out whole circle welding equipment, and do not need on shroud, carry out partial cut repair welding again.
2, present invention, avoiding the loaded down with trivial details flow process of shroud nibs split region partial cut repair welding again, cost of production saved effectively by the dividing plate huge for production output.
Accompanying drawing explanation
Fig. 1 is conventional leaf grating horizontal flange segmentation situation schematic perspective view;
Fig. 2 is horizontal flange stator blade split position schematic diagram;
Fig. 3 is standard stator blade schematic perspective view;
Fig. 4 is stator blade schematic diagram of the present invention.
Number in the figure: 1-blade, 2-interior shroud, 3-peripheral band, 4-apical cap, 5-end, is preced with, 6-horizontal flange, 7-split stator blade, 8-standard stator blade, 9-nibs, 10-cutting zone.
Embodiment
As shown in Figures 1 to 4: a kind of steam turbine band coronule structure split stator blade, comprise blade 1, apical cap 4 and end hat 5, described blade 1 machines away a part at apical cap 4 and end Guan5Chu respectively to steam passage direction according to below split 6 cutting lines, this part is no more than 1/4th of blade length, width is 3mm, makes this part blade 1 not enter nibs 9.Standard stator blade 8 namely forms according to above-mentioned requirements cutting by reality.
A processing method for above-mentioned steam turbine band coronule structure split stator blade, comprises the steps:
1) find horizontal flange 6 cutting lines in the position of split stator blade 7; And be preced with this position of 5 underlinings at apical cap 4 and the end respectively;
2) be preced with 5 line place at apical cap 4 and the end respectively, along steam passage direction, blade cut away a part, make this part blade 1 just not enter nibs 9;
3) check whether cutting neatly puts in place, until meet the requirements.
Because split stator blade 7 of the present invention machines away blade 3mm from apical cap 4 and end Guan5Chu respectively to steam passage direction according to split 6 cutting lines in advance, thus can separate smoothly along horizontal flange 6 after making stator blade and inside and outside shroud 2,3 carry out whole circle welding equipment, and do not need the cutting zone 10 on shroud to carry out partial cut repair welding again.Present invention, avoiding the loaded down with trivial details flow process of shroud nibs 9 split region partial cut repair welding again, cost of production saved effectively by the dividing plate huge for production output.
Claims (4)
1. a steam turbine band coronule structure split stator blade, comprise blade, apical cap and end hat, it is characterized in that: described blade machines away a part at apical cap and end Guan Chu respectively to steam passage direction according to below split cutting lines, make this part blade not enter nibs.
2. steam turbine band coronule structure split stator blade according to claim 1, is characterized in that: described blade machines away part and is no more than 1/4th of blade length.
3. steam turbine band coronule structure split stator blade according to claim 1 or 2, is characterized in that: described blade machines away part for 3mm.
4. a processing method for steam turbine band coronule structure split stator blade described in claim 1, is characterized in that: comprise the steps,
1) find horizontal flange cutting lines in the position of split stator blade; And respectively in apical cap and hat this position of underlining, the end;
2) along steam passage direction, blade is cut away a part at apical cap and end hat line place respectively, make this part blade just not enter nibs;
3) check whether cutting neatly puts in place, until meet the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510840733.0A CN105257343B (en) | 2015-11-27 | 2015-11-27 | A kind of steam turbine band coronule structure split stator blade and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510840733.0A CN105257343B (en) | 2015-11-27 | 2015-11-27 | A kind of steam turbine band coronule structure split stator blade and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257343A true CN105257343A (en) | 2016-01-20 |
| CN105257343B CN105257343B (en) | 2017-03-08 |
Family
ID=55097231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510840733.0A Active CN105257343B (en) | 2015-11-27 | 2015-11-27 | A kind of steam turbine band coronule structure split stator blade and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105257343B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675867Y (en) * | 2003-09-29 | 2005-02-02 | 上海汽轮机有限公司 | Stationary integral blade separator of impulse steam turbine |
| CN101215977A (en) * | 2007-12-29 | 2008-07-09 | 东方电气集团东方汽轮机有限公司 | Steam turbine nozzle set and its machining process |
| WO2014105621A1 (en) * | 2012-12-29 | 2014-07-03 | United Technologies Corporation | Split cast vane fairing |
-
2015
- 2015-11-27 CN CN201510840733.0A patent/CN105257343B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675867Y (en) * | 2003-09-29 | 2005-02-02 | 上海汽轮机有限公司 | Stationary integral blade separator of impulse steam turbine |
| CN101215977A (en) * | 2007-12-29 | 2008-07-09 | 东方电气集团东方汽轮机有限公司 | Steam turbine nozzle set and its machining process |
| WO2014105621A1 (en) * | 2012-12-29 | 2014-07-03 | United Technologies Corporation | Split cast vane fairing |
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| Publication number | Publication date |
|---|---|
| CN105257343B (en) | 2017-03-08 |
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