CN203146038U - Steam inlet valve group casing of divided-flow turbine - Google Patents
Steam inlet valve group casing of divided-flow turbine Download PDFInfo
- Publication number
- CN203146038U CN203146038U CN 201220695408 CN201220695408U CN203146038U CN 203146038 U CN203146038 U CN 203146038U CN 201220695408 CN201220695408 CN 201220695408 CN 201220695408 U CN201220695408 U CN 201220695408U CN 203146038 U CN203146038 U CN 203146038U
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- steam inlet
- valve group
- inlet valve
- type guide
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Abstract
The utility model provides a steam inlet valve group casing of a divided-flow turbine. The steam inlet valve group casing comprises a steam inlet valve group casing body and molded line type guide ribs, and two molded line type guide ribs are designed at the steam inlet front ends of regulating valves of the steam inlet valve group casing body. Compared with a conventional structure, the molded line type guide ribs are added to inlet ends of the regulating valves inside the valve group casing body, so that steam entering valve cavities of the regulating valves can be reasonably distributed, strong rotational flow in the valve cavities of the regulating valves of a conventional steam inlet valve group can be effectively inhibited, and the flowing loss can be reduced. The analysis shows as follows: with the adoption of the structure of the steam inlet valve group casing, working pressure loss of the steam inlet valve group can be reduced by 40%, operating cost of a unit is reduced greatly, and the energy-saving effect is obvious; and simultaneously, the added guide ribs can enhance the strength of a valve casing, the stress of the valve casing is reduced, the service life of the valve casing is prolonged, and the safety for operation of the unit is improved.
Description
Technical field
The utility model relates to motive power machine equipment and makes the field, is specifically related to a kind of divided-flow turbine suction valve group housing.
Background technique
The variation of steam turbine start and stop and power is the variation by the steam inlet valve aperture, and the steam flow enter steam turbine or steam parameter realize thereby change.For the large turbo-type generator group, its intake system generally is made of two main stop valves and four modulating valve, and two modulating valve of a main stop valve band constitute one group, totally two groups of steam inlet valve groups.As the critical component that connects boiler and steam turbine, the service behaviour of steam inlet valve group is significant to efficient operation and the safe operation of whole steam turbine set.From the angle of Economy, the every rising 1% of steam inlet valve group work crushing, steam turbine high-pressure cylinder efficient descends 0.4% approximately.Therefore the work crushing that reduces the steam inlet valve group is steam turbine, an important topic during particularly Large Steam Turbine Sets is developed.
At present, along with increasing rapidly of the continuous increase of the improving constantly of steam turbine steam inlet condition, the power of the assembling unit, hardware investment, make the owners of power plant more and more higher to Economy and the security requirement of unit, steam turbine steam inlet valve group is subjected to the especially attention of the user of power plant and steam turbine manufacturer because of its significance to the efficient operation of whole steam turbine set always.
Steam turbine steam inlet valve group fluid mechanics based on one dimension on structural type commonly used at present calculates, under most of situation, do not consider the three dimensional space flow characteristic of steam working medium in the valve, in the actual moving process of unit, high temperature, high pressure steam flow field exist strong eddy flow and maelstrom district in the steam inlet valve group housing, have a strong impact on the through-flow efficient of steam turbine steam inlet valve group, made the operating cost of whole steam turbine set improve greatly.
The model utility content
The utility model proposes a kind of divided-flow turbine suction valve group housing, purpose is to solve the above-mentioned shortcoming of traditional steam turbine steam inlet valve group structural type as shown in Figure 1, improve the flow efficiency of steam inlet valve group, reduce the work crushing of steam inlet valve group, and then reduce the operating cost of whole steam turbine set.
The divided-flow turbine steam inlet valve group housing that the utility model proposes comprises steam inlet valve group housing and molded lines type guide rib, and wherein the modulating valve admission Front-end Design of steam inlet valve group housing has two molded lines type guide ribs.
Alternatively, described two molded lines type guide rib structural type unanimities are symmetrically arranged in admission center line both sides.
Alternatively, the front end of described two molded lines type guide ribs is met always the steam flow from main stop valve, and through turning back shunting, the rear end is rolled over to turn 90 degrees and led to two modulating valve chambers respectively.
Alternatively, the pressure side of described molded lines type guide rib 2 is smooth gradual change circular arc, and suction surface is that straight line connects smooth gradual change circular arc.
Alternatively, described two molded lines type guide ribs 2 and steam inlet valve group housing 1 integrally casting.
Divided-flow turbine suction valve group housing of the present utility model has the following advantages: with respect to traditional valve group shell construction as shown in Figure 1, the feasible high-temperature high-pressure steam working medium reasonable diffluence that enters the modulating valve chamber, can suppress the strong eddy flow in the modulating valve chamber in the conventional construction effectively, reduce flow losses.
Description of drawings
Fig. 1 a is traditional steam inlet valve group shell construction schematic representation.
Fig. 1 b is the A-A sectional view of Fig. 1 a.
Fig. 2 a is divided-flow turbine steam inlet valve group shell construction schematic representation of the present utility model.Fig. 2 b is the B-B sectional view of Fig. 2 a.
Fig. 3 is the Computational Fluid Dynamic Analysis speed vector figure of traditional steam inlet valve group housing.
Fig. 4 is divided-flow turbine steam inlet valve group housing Computational Fluid Dynamic Analysis speed vector figure of the present utility model.
Fig. 5 is the structure enlarged diagram of molded lines type guide rib.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
Fig. 2 a is divided-flow turbine steam inlet valve group shell construction schematic representation of the present utility model, and Fig. 2 b is the B-B sectional view of Fig. 2 a.Fig. 4 is divided-flow turbine steam inlet valve group housing Computational Fluid Dynamic Analysis speed vector figure of the present utility model.Fig. 5 is the structure enlarged diagram of molded lines type guide rib.
With reference to Fig. 2 a, 2b, Fig. 4, Fig. 5, divided-flow turbine steam inlet valve group housing of the present utility model comprises steam inlet valve group housing 1 and molded lines type guide rib 2, and the modulating valve admission Front-end Design of steam inlet valve group housing 1 has two molded lines type guide ribs 2.Two molded lines type guide rib 2 structural type unanimities are symmetrically arranged in admission center line both sides.The front end of two molded lines type guide ribs 2 is met always the steam flow from main stop valve, and through turning back shunting, the rear end is rolled over to turn 90 degrees and led to two modulating valve chambers respectively.The pressure side (concave surface) of molded lines type guide rib 2 is smooth gradual change circular arc, and suction surface (convex surface) is smooth gradual change circular arc for straight line connects.Two molded lines type guide ribs 2 and steam inlet valve group housing 1 integrally casting.
When adopting divided-flow turbine steam inlet valve group housing of the present utility model, the manufacturing of steam inlet valve group housing and traditional approach basically identical, crucial difference is that the modulating valve entrance point of valve group enclosure interior increases by two molded lines type guide ribs 2.
Symbol F represents the inlet diameter of modulating valve chamber among Fig. 5; Symbol C represents that the starting point of molded lines type guide rib is apart from the distance of admission center line; Symbol A represents the pressure side radius of molded lines type guide rib; Symbol B represents the radius of molded lines type guide rib suction surface; Symbol D represents guide rib suction surface import extension; Symbol E represents the horizontal width of guide rib.Two molded lines type guide ribs and the cast inblock of admission valve casing constitute one.
The divided-flow turbine steam inlet valve group housing that the utility model provides, compare with conventional structure, increase molded lines type guide rib by the modulating valve entrance point in valve group enclosure interior, make the steam flow that enters the modulating valve valve pocket carry out reasonable diffluence, can suppress the strong eddy flow in the modulating valve chamber in the conventional steam inlet valve group effectively, reduce flow losses.
Fig. 3 has provided mobile map local in the conventional valve shell structure, and as seen there is strong eddy flow in this place.Fig. 4 has provided local flow collection of illustrative plates of the present utility model, has as seen effectively suppressed unborn strong eddy flow.The analysis showed that: adopt steam inlet valve group shell construction of the present utility model can reduce steam inlet valve group work crushing 40%, greatly reduce the operating cost of unit, energy-saving effect is obvious.Simultaneously, two molded lines type guide ribs of increase have increased the intensity of valve casing, have reduced can prolong the working life of valve casing more than the stress 20MPa at this place, reduce maintenance workload, improve the Security of unit operation.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a divided-flow turbine steam inlet valve group housing comprises steam inlet valve group housing (1) and molded lines type guide rib (2), it is characterized in that: the modulating valve admission Front-end Design of steam inlet valve group housing (1) has two molded lines type guide ribs (2).
2. divided-flow turbine steam inlet valve group housing according to claim 1, it is characterized in that: described two molded lines type guide ribs (2) structural type unanimity is symmetrically arranged in admission center line both sides.
3. divided-flow turbine steam inlet valve group housing according to claim 1 is characterized in that: the front end of described two molded lines type guide ribs (2) is met always from the steam flow of main stop valve, and through turning back shunting, the rear end is rolled over to turn 90 degrees and led to two modulating valve chambers respectively.
4. divided-flow turbine steam inlet valve group housing according to claim 1, it is characterized in that: the pressure side of described molded lines type guide rib (2) is smooth gradual change circular arc, suction surface is that straight line connects smooth gradual change circular arc.
5. divided-flow turbine steam inlet valve group housing according to claim 1 is characterized in that: described two molded lines type guide ribs (2) and steam inlet valve group housing (1) integrally casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695408 CN203146038U (en) | 2012-12-14 | 2012-12-14 | Steam inlet valve group casing of divided-flow turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695408 CN203146038U (en) | 2012-12-14 | 2012-12-14 | Steam inlet valve group casing of divided-flow turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146038U true CN203146038U (en) | 2013-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220695408 Expired - Fee Related CN203146038U (en) | 2012-12-14 | 2012-12-14 | Steam inlet valve group casing of divided-flow turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146038U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965354A (en) * | 2017-11-24 | 2018-04-27 | 西安交通大学 | A kind of steam turbine is uniformly into vapour/filling device |
| JP2019060265A (en) * | 2017-09-26 | 2019-04-18 | 株式会社東芝 | Steam valve device and steam turbine plant with the same |
-
2012
- 2012-12-14 CN CN 201220695408 patent/CN203146038U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019060265A (en) * | 2017-09-26 | 2019-04-18 | 株式会社東芝 | Steam valve device and steam turbine plant with the same |
| CN107965354A (en) * | 2017-11-24 | 2018-04-27 | 西安交通大学 | A kind of steam turbine is uniformly into vapour/filling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20201214 |