CN203655364U - Hollow clapboard of steam turbine - Google Patents
Hollow clapboard of steam turbine Download PDFInfo
- Publication number
- CN203655364U CN203655364U CN201420045470.5U CN201420045470U CN203655364U CN 203655364 U CN203655364 U CN 203655364U CN 201420045470 U CN201420045470 U CN 201420045470U CN 203655364 U CN203655364 U CN 203655364U
- Authority
- CN
- China
- Prior art keywords
- hollow
- steam turbine
- blade
- clapboard
- gap
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 101100537937 Caenorhabditis elegans arc-1 gene Proteins 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000007791 dehumidification Methods 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 description 2
- 238000006798 ring closing metathesis reaction Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a hollow clapboard of a steam turbine. The hollow clapboard of the steam turbine is characterized in that a hollow guide blade is opened with gaps, and the clapboard comprises an inner and an outer annular cavity suction structure; a water removal gap is opened in each of 3/4 position of the inner arc of the blade and 1/5 position of the back arc near the root of the blade, the cavity of the hollow guide blade is communicated with the inner and outer annular cavities of the clapboard, and the outer annular cavity is connected with an outer cylinder through a pipeline and forms negative micro-pressure. The hollow clapboard of the steam turbine has beneficial effects that the dehumidification of the hollow clapboard of the steam turbine is realized through opening gaps at the water drop deposition positions of the surface of the blade grid of the hollow guide blade, the water drop is removed by means of the pressure difference between the inside and outside of the gap, and accordingly the corrosion to a movable blade is avoided.
Description
technical field:
The utility model relates to mechanical equipment technical field, refers in particular to a kind of steam turbine hollow shelf.
background technique:
Steam turbine, as topmost heating power prime mover, occupies extremely important status in the fields such as the energy, electric power and energetics.Along with greatly developing of large capacity, high parameter thermal power steam turbine and nuclear steam turbine etc., it is day by day serious that turbine for wet steam problem becomes.
The blade of steam turbine often works in wet-steam region.Along with the expansion of steam, its humidity increases, and just has water droplet and produces gradually.The motion of these water droplets will rely on main steam to drive, and need to consume the part energy of main steam; Droplets impact its movable vane leading edge back of the body arc, stops movable vane motion, has increased moving blade loss; Because water droplet constantly clashes into movable vane, blade surface is corroded, profile loss increases simultaneously; The movement velocity of steam and water droplet etc. also can not make to produce whirlpool in vapor stream, has destroyed the molded line shape of blade, and stage efficiency is declined.In a word, the water droplet in wet vapor has not only reduced stage efficiency, and has corroded moving vane, has shortened the operating life of blade, has increased the potential safety hazard of unit operation.
model utility content:
The purpose of this utility model is to provide a kind of steam turbine hollow shelf, reduces steam moisture and the large water droplet content of steam turbine, prevents or alleviates movable vane water erosion.
The purpose of this utility model realizes as follows: a kind of steam turbine hollow shelf, is characterized in that: this hollow shelf adopts hollow guide vane crack gap, dividing plate inside and outside ring cavity suction structure; In blade concavity 3/4 position, the back of the body arc 1/5 position offer near blade root position the gap of anhydrating, the cavity UNICOM dividing plate inside and outside ring chamber of hollow guide vane, outer shroud chamber connects outer shell by pipeline, and forms micro-negative pressure.
The beneficial effects of the utility model are, it is that gap is offered in position at hollow stator leaf grating surface droplet deposition that steam turbine hollow shelf dries, and utilizes the inside and outside pressure reduction in gap to remove water droplet, prevents the erosion of water droplet to movable vane.
accompanying drawing explanation:
Fig. 1 is the utility model structural representation plan view;
Fig. 2 is that the utility model structural representation A-A is to sectional view;
Fig. 3 is the utility model inside and outside ring structure schematic diagram.
In figure: outer shroud 1, interior ring 2, outer shroud closure plate 3, interior ring closure plate 4
embodiment:
With reference to accompanying drawing, a kind of steam turbine hollow shelf, is characterized in that: this hollow shelf adopts hollow guide vane crack gap, dividing plate inside and outside ring cavity suction structure; In blade concavity 3/4 position, the back of the body arc 1/5 position offer near blade root position the gap of anhydrating, the cavity UNICOM dividing plate inside and outside ring chamber of hollow guide vane, outer shroud chamber connects outer shell by pipeline, and forms micro-negative pressure.Interior ring 2 and outer shroud 1 adopt casting welded structure, and interior ring closure plate 4 and outer shroud closure plate 3 are welded in inner and outer rings, form inner and outer rings chamber.Hollow shelf of the present utility model is different from traditional partition board of steam turbine, and this hollow shelf adopts hollow guide vane crack gap, dividing plate inside and outside ring cavity suction structure compared with traditional steam turbine.Wet vapor when the hollow shelf, drops in stator surface deposition to the larger flood of unit harm and forms moisture film and flow along airflow direction, in blade concavity end and back of the body forearc end water film thickness maximum, and pushes up blade root position moisture film from leaf and converges more remarkable along leaf is high.In inner arc 3/4 position, the back of the body arc 1/5 position offer near blade root position the gap of anhydrating, the cavity UNICOM dividing plate inside and outside ring chamber of hollow guide vane, outer shroud chamber connects outer shell by pipeline and forms micro-negative pressure, suction is through the moisture film of gap position, reach the object that reduces steam moisture and large water droplet content, thereby improve the safety reliability of unit.
Claims (1)
1. a steam turbine hollow shelf, is characterized in that: this hollow shelf adopts hollow guide vane crack gap, dividing plate inside and outside ring cavity suction structure; In blade concavity 3/4 position, the back of the body arc 1/5 position offer near blade root position the gap of anhydrating, the cavity UNICOM dividing plate inside and outside ring chamber of hollow guide vane, outer shroud chamber connects outer shell by pipeline, and forms micro-negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420045470.5U CN203655364U (en) | 2014-01-24 | 2014-01-24 | Hollow clapboard of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420045470.5U CN203655364U (en) | 2014-01-24 | 2014-01-24 | Hollow clapboard of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655364U true CN203655364U (en) | 2014-06-18 |
Family
ID=50921763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420045470.5U Expired - Lifetime CN203655364U (en) | 2014-01-24 | 2014-01-24 | Hollow clapboard of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655364U (en) |
-
2014
- 2014-01-24 CN CN201420045470.5U patent/CN203655364U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150928 Address after: 150000 No. 35, Honghu Road, Yingbin Road, Harbin hi tech Development Zone, Heilongjiang, China Patentee after: HARBIN GUANGHAN POWER TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 150000 Honghu Road, Daoli District, Heilongjiang, No. 35, Harbin Patentee before: The 703nd Research Institute of China Shipbuilding Industry Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |