CN202228133U - Steam turbine nozzle - Google Patents
Steam turbine nozzle Download PDFInfo
- Publication number
- CN202228133U CN202228133U CN2011203421112U CN201120342111U CN202228133U CN 202228133 U CN202228133 U CN 202228133U CN 2011203421112 U CN2011203421112 U CN 2011203421112U CN 201120342111 U CN201120342111 U CN 201120342111U CN 202228133 U CN202228133 U CN 202228133U
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- Prior art keywords
- nozzle
- steam
- steam turbine
- stator blade
- stationary blades
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Abstract
The utility model discloses a nozzle used in the steam turbine field comprising an outer ring, an inner ring, and stationary blades. The stationary blades are uniformly arranged in a circumference between the outer ring and the inner ring. The included angle between a circular section of the nozzle and each of the stationary blades is in a range of from 10degrees to 30degrees. The space formed by the outer ring, the inner ring, and the adjacent two stationary blades is a steam inlet channel of the nozzle. In the utility model, the angle between the circular section of the nozzle and each of the stationary blades can be changed to realize the transition of the steam from the inlet in a tangential direction to the expansion along the pressure grade in an axial direction, thereby the energy loss caused by the direct steam change from the tangential direction to the axial direction, and the structure of the steam turbine can be compacter. The axial distances between the stationary blade connection parts and the moving blade inner edges can be increased, thereby the erosion energy of the middle, small particles in the steam can be reduced.
Description
Technical field
The utility model relates to a kind of nozzle that is used for the steam turbine field.
Background technique
Nozzle is the vitals in the steam turbine; Steam expands in nozzle, forms steam steam flow at a high speed, and the temperature of steam descends in nozzle simultaneously; Therefore the effect of nozzle is to make the heat energy of steam effectively convert kinetic energy into; The governing stage moving vane is produced active force, promote the governing stage moving vane and drive rotor rotation, thereby steam turbine is externally done work.In addition, other effect of nozzle comprises leads to steam flow, and the admission degree of regulating steam turbine.
As shown in Figure 1: nozzle is the parts that bear the maximum temperature steam flow in the Turbine Flow Path; Nozzle on the steam turbine adopts whole electrical pulse processing more, and then cuts at present; Be divided into plurality of nozzles group segmental arc 11, then nozzle sets segmental arc 11 be screwed in the nozzle box.Between the adjacent nozzles group segmental arc 11, spacer block 12 is set.At present the nozzle stator blade on the steam turbine all is to be parallel with the circular cross section of nozzle.Design as shown in Figure 2, such, the vaporium of nozzle 10 admission one end must have one section steam supply stream to change first changeover portion 14 of direction.This has increased through-flow axial length; Also caused the loss of a large amount of steam energies, structurally the root of stator blade on the conventional spout 10 and governing stage moving vane directly is far longer than the root footpath of pressure level blade thereafter in addition, therefore will design second changeover portion 15; After making steam pass through the moving vane of nozzle and governing stage; Directly carry out the transition to relatively low pressure level root footpath by higher relatively governing stage root, such design has also increased through-flow axial length, has also caused the loss of a large amount of steam energies.Simultaneously when the steam turbine operation at part load, valve 13 parts are opened, and the governing stage moving vane behind this nozzle has been produced additional vapour crack excitation force, serious threat the moving vane safe operation of governing stage.
The model utility content
The purpose of the utility model is in order to overcome the deficiency of existing technology, to provide a kind of steam turbine to use nozzle, and its structure is beneficial to steam lowers the temperature in its stream passageway and expand, thereby makes the steam turbine structure compact more, and reduces the energy loss of steam in nozzle.
A kind of technological scheme that realizes above-mentioned purpose is:
A kind of steam turbine is used nozzle, comprises outer shroud, and interior ring and stator blade are evenly arranged in the circumference of said stator blade between said outer shroud and interior ring; Angle between the circular cross section of said stator blade and said nozzle is 10 ° to 30 °, and promptly the angle between the circular cross section of the blade profile center line of said stator blade and said nozzle is 10 ° to 30 °; The space that forms between said outer shroud, interior ring and the adjacent two said stator blades is the steam admission passage of said nozzle.
Further, said nozzle has the structure of the integral type of milling system machine shaping.
Further, on the excircle of said outer shroud mounting groove is set.
Adopted the steam turbine of the utility model to use nozzle; The technique effect of obtaining is: through changing the angle between the stator blade and said nozzle circular cross section on the said nozzle; Realized preferably steam by tangential admission to transition along the pressure level axial expansion; Minimizing steam is directly transferred by the tangential and is axial energy loss, makes that also the structure of steam turbine is compact more.This has also increased the axial distance that encircles in the stator blade between joint and the moving vane inner edge simultaneously, thereby reduces the erosion energy of steam small particles.
Description of drawings
Fig. 1 is the plan view of existing technology steam turbine with nozzle;
Fig. 2 is in inner cylinder the scheme of installation of existing technology steam turbine with nozzle.
Fig. 3 is the plan view of the steam turbine of the utility model with nozzle;
Fig. 4 is the left view of the steam turbine of the utility model with nozzle;
Fig. 5 is the stator blade schematic representation of the steam turbine of the utility model with nozzle;
Fig. 6 is in inner cylinder the scheme of installation of the steam turbine of the utility model with nozzle.
Embodiment
See also Fig. 3 to Fig. 6, the utility model in order to understand the technological scheme of the utility model better, below through embodiment particularly, and combine accompanying drawing at length to explain:
See also Fig. 3 and Fig. 4, a kind of steam turbine of the utility model is used nozzle, comprises outer shroud 1, and interior ring 2 and stator blade 3 are evenly arranged in the circumference of said stator blade 3 between said outer shroud 1 and interior ring 2; The space that forms between said outer shroud 1, interior ring 2 and the adjacent two said stator blades 3 is the steam admission passage of said nozzle.
The outer shroud 1 of said nozzle, interior ring 2 and stator blade 3 are the structure of integral type; This structure is milled system processing and is made on the annular blank forging.During installation, will put in order the circle nozzle and be divided into upper semisection and lower semisection, behind first cylinder and second cylinder of the inner casing of whole respectively embedding steam turbine, carry out the location of axial and circumferential again.
The steam turbine of the utility model has been cancelled in the existing technology with nozzle; The spacer block that is provided with when nozzle is installed; Realized full admission, its purpose is to strengthen the rigidity of nozzle, makes nozzle can bear low reaction degree and high enthalpy drop; Be beneficial to reduce the temperature of steam, thereby guarantee the intensity of governing stage moving vane 6 and rotor in the outlet port of stator blade 3.In addition, because nozzle has been realized full admission, make nozzle when operation at part load, the steam steam flow can not produce additional vapour crack excitation force to governing stage moving vane 6 yet, and this also helps to guarantee the intensity of governing stage moving vane 6.
For the ease of nozzle being carried out the location of axial and circumferential; The outer ring of said outer shroud 1 is provided with six draw-in groove is installed, and these six draw-in groove is installed, and comprises a top installation draw-in groove 42; Draw-in groove 41 is installed in a bottom, and four splits that are provided with along the excircle of nozzle outer shroud 1 are installed draw-in groove to 43.During installation; Said nozzle cuts along split; Be divided into upper semisection and lower semisection, the upper semisection of said nozzle comprises that two splits are installed draw-in groove 43 and draw-in groove 42 is installed on a top, and the lower semisection of said nozzle comprises that two splits are installed draw-in groove 43 and draw-in groove 41 is installed in a bottom.Being designed with like this helps said nozzle behind first cylinder that embeds cylinder and second cylinder, carries out the location of axial and circumferential.
See also Fig. 5 and Fig. 6, the angle between the stator blade 3 of the utility model and the circular cross section of said nozzle is 10 ° to 30 °, is angle [alpha] between the blade profile center line 31 of promptly said stator blade 3 and the circular cross section of said nozzle.The scope of this angle [alpha] is 10 ° to 30 °.Wherein the definition of blade profile center line is that arbitrary stator blade 3 on the said nozzle is made up of the molded lines along some sealings of the high direction of leaf, and the line at these molded lines centers has constituted the blade profile center line 31 of this stator blade 3.When said nozzle was installed on the inner cylinder, the distance of the joint of interior ring 2 and stator blade 3 and governing stage moving vane 6 inner edges was greater than the joint of outer shroud 1 and stator blade 3 and the distance between governing stage moving vane 6 outer rims.
The purpose of design is to utilize the angle between stator blade 3 and the said nozzle circular cross section like this, and the admission direction of steam is changed.So just can cancel first changeover portion in the admission chamber 5 in the former steam turbine; In addition on the one hand; Stator blade 3 on the nozzle and the root footpath that governing stage moving vane 6 can adopt with the pressure level blade is the same thereafter; And do not reduce the enthalpy drop of steam in nozzle; So just can cancel second changeover portion behind the nozzle in the former steam turbine, thereby reduce the axial length of steam turbine, make the steam turbine structure compact more.Moreover,, realized preferably from steam by tangential admission that reducing that steam directly transferred by the tangential is axial energy loss because nozzle steam admission passage has transitional function to transition along the pressure level axial expansion.In addition, owing to increased the axial distance that encircles in the stator blade between joint and the moving vane inner edge, thus reduce the erosion energy of steam small particles.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model the above embodiment's variation, modification.
Claims (3)
1. a steam turbine is used nozzle, comprises outer shroud (1), and interior ring (2) and stator blade (3) are evenly arranged in the circumference of said stator blade (3) between said outer shroud (1) and interior ring (2); The space that forms between said outer shroud (1), interior ring (2) and the adjacent two said stator blades (3) is the steam admission passage of said nozzle, it is characterized in that:
Angle between the circular cross section of said stator blade (3) and said nozzle is 10 ° to 30 °, and the angle between the blade profile center line (31) of promptly said stator blade (3) and the circular cross section of said nozzle is 10 ° to 30 °.
2. steam turbine according to claim 1 is used nozzle, it is characterized in that: said nozzle has the structure of the integral type of milling system machine shaping.
3. according to claim 1 or 2 said nozzles, it is characterized in that: on the excircle of said outer shroud (1) the installation draw-in groove is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203421112U CN202228133U (en) | 2011-09-13 | 2011-09-13 | Steam turbine nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203421112U CN202228133U (en) | 2011-09-13 | 2011-09-13 | Steam turbine nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228133U true CN202228133U (en) | 2012-05-23 |
Family
ID=46078721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203421112U Expired - Lifetime CN202228133U (en) | 2011-09-13 | 2011-09-13 | Steam turbine nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228133U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643978A (en) * | 2018-07-17 | 2018-10-12 | 中国船舶重工集团公司第七0三研究所 | A kind of novel advanced technique |
| CN110049820A (en) * | 2016-12-05 | 2019-07-23 | 康明斯过滤Ip公司 | Separation assembly with single-piece impulse turbine machine |
| CN113383146A (en) * | 2019-02-07 | 2021-09-10 | 三菱重工船用机械株式会社 | Loss reduction device for partial feed turbine and partial feed turbine |
-
2011
- 2011-09-13 CN CN2011203421112U patent/CN202228133U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110049820A (en) * | 2016-12-05 | 2019-07-23 | 康明斯过滤Ip公司 | Separation assembly with single-piece impulse turbine machine |
| CN110049820B (en) * | 2016-12-05 | 2021-07-20 | 康明斯过滤Ip公司 | Separator assembly with single-piece impulse turbine |
| CN108643978A (en) * | 2018-07-17 | 2018-10-12 | 中国船舶重工集团公司第七0三研究所 | A kind of novel advanced technique |
| CN113383146A (en) * | 2019-02-07 | 2021-09-10 | 三菱重工船用机械株式会社 | Loss reduction device for partial feed turbine and partial feed turbine |
| CN113383146B (en) * | 2019-02-07 | 2023-09-15 | 三菱重工船用机械株式会社 | Loss reduction device for partial feeding into turbine and partial feeding into turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |
|
| CX01 | Expiry of patent term |