CN203939533U - A kind of discharge cylinder of steam turbine - Google Patents
A kind of discharge cylinder of steam turbine Download PDFInfo
- Publication number
- CN203939533U CN203939533U CN201420118593.7U CN201420118593U CN203939533U CN 203939533 U CN203939533 U CN 203939533U CN 201420118593 U CN201420118593 U CN 201420118593U CN 203939533 U CN203939533 U CN 203939533U
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- CN
- China
- Prior art keywords
- spiral case
- guide plate
- steam turbine
- sidewall
- outer guide
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- 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.)
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Abstract
A discharge cylinder of steam turbine, comprises that a spiral case, is arranged on the rotor of described spiral case axial centre, and is arranged on the Diffuser in described spiral case; Described spiral case is enclosed and is made by upper wall and sidewall, and its axial width is greater than the width of described Diffuser; Described Diffuser comprises interior guide plate and outer guide plate, between interior guide plate and outer guide plate, forms runner; Described outer guide plate is arranged on the sidewall of described spiral case; Described interior guide plate is arranged in spiral case, and its structure is quadrant segmental arc; The upside of described spiral case and downside are respectively arranged with two stiffening ribs; The middle part of described spiral case is symmetrically arranged with two reinforcing props; The beneficial effects of the utility model are: compared with prior art, reduced the quantity of the interior stiffening rib of spiral case and reinforcing prop, thereby reduced the quantity of Secondary Flow vortex system, reduced the pitot loss in exhaust casing runner, further improved the thermal efficiency of steam turbine set.
Description
Technical field
The utility model relates to a kind of exhaust casing of small steam turbine, belongs to steam turbine equipment technical field.
Background technique
Discharge cylinder of steam turbine is the passage that connects the outlet of condensing steam turbine final stage leaf grating and vapour condenser, and its Main Function is to be pressure energy by the leaving velocity kinetic transformation of steam turbine mesolow cylinder final stage leaf grating outlet, and the exhaust of low pressure (LP) cylinder final stage leaf grating is imported to vapour condenser.
In actual applications, during the outlet pressure of exhaust casing, determine, and existing exhaust casing inside is provided with stiffening rib and the reinforcing prop being circumferentially evenly arranged, stiffening rib and reinforcing prop improve over against the vapor pressure at the place, side of vapor flow direction, the vapor pressure at place, another side reduces, steam is when by above-mentioned stiffening rib and reinforcing prop, there will be Secondary Flow vortex system, this Secondary Flow vortex system is moved in company with main flow, and run into other stiffening ribs and reinforcing prop in flowing, and then be split into more more complicated vortex systems, the pressure of exhaust casing inside is had a negative impact; In addition, exhaust casing inside is provided with straight tabular interior guide plate and outer guide plate, affected by straight platy structure, steam must could pass through exhaust casing with higher pressure, and in exhaust casing, form strong swirl flow, not only aggravate exhaust casing internal pressure, and caused exhaust casing outlet pressure excessive, do not met product requirement.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of structural stability is provided, and can prevent from spiral case forming Secondary Flow vortex system, guarantees the stable discharge cylinder of steam turbine of exhaust casing outlet pressure.
The purpose of this utility model is achieved by the following technical solution: comprise that a spiral case, is arranged on the rotor of described spiral case axial centre, and is arranged on the Diffuser in described spiral case; Described spiral case is enclosed and is made by upper wall and sidewall, and its axial width is greater than the width of described Diffuser; Described Diffuser comprises interior guide plate and outer guide plate, between interior guide plate and outer guide plate, forms runner; Described outer guide plate is arranged on the sidewall of described spiral case; Described interior guide plate is arranged in spiral case, and its structure is quadrant segmental arc; The upside of described spiral case and downside are respectively arranged with two stiffening ribs; The middle part of described spiral case is symmetrically arranged with two reinforcing props.
Four rectangular structural configuration of stiffening rib in described spiral case are in spiral case, wherein, two stiffening ribs of spiral case upside and two stiffening ribs of spiral case downside are arranged symmetrically with the horizontal line at spiral case center, and two stiffening ribs of spiral case upside or downside are arranged symmetrically with the vertical curve at spiral case center.
Described spiral case upper wall with shown in the joint of joint, described outer guide plate and described sidewall of spiral case sidewall all adopt arc transition.
The Flow area of described runner expands gradually along the flow direction of steam.
The beneficial effects of the utility model are: compared with prior art, reduced the quantity of the interior stiffening rib of spiral case and reinforcing prop, thereby reduced the quantity of Secondary Flow vortex system, alleviated the impact on flow stability in spiral case, reduce the pitot loss in exhaust casing runner, further improve the thermal efficiency of steam turbine set; Spiral case upper wall with shown in the joint of joint, described outer guide plate and described sidewall of spiral case sidewall all adopt arc transition, can avoid stress concentrated, guarantee the structural stability of whole exhaust casing.
Accompanying drawing explanation
Fig. 1 is structure side view of the present utility model.
Fig. 2 is structural front view of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: as shown in Figure 1, 2, comprise that the rotor 2, that a spiral case 1, is arranged on described spiral case 1 axial centre is arranged on the Diffuser 3 in described spiral case 1; Described spiral case 1 is enclosed and is made by upper wall 11 and sidewall 12, and its axial width is greater than the width of described Diffuser 3; Described Diffuser 3 comprises interior guide plate 31 and outer guide plate 32, between interior guide plate 31 and outer guide plate 32, forms runner 33; Described outer guide plate 32 is arranged on the sidewall 12 of described spiral case 1; Described interior guide plate 31 is arranged in spiral case 1, and its structure is quadrant segmental arc; The upside of described spiral case 1 and downside are respectively arranged with two stiffening ribs 4; The middle part of described spiral case is symmetrically arranged with two reinforcing props 5; The utility model has reduced the quantity of the interior stiffening rib of spiral case and reinforcing prop, thereby has reduced the quantity of Secondary Flow vortex system, has alleviated the impact on flow stability in spiral case, reduces the pitot loss in exhaust casing runner, further improves the thermal efficiency of steam turbine set;
Four rectangular structural configuration of stiffening rib in described spiral case are in spiral case, wherein, two stiffening ribs of spiral case upside and two stiffening ribs of spiral case downside are arranged symmetrically with the horizontal line at spiral case center, and two stiffening ribs of spiral case upside or downside are arranged symmetrically with the vertical curve at spiral case center.
Described spiral case upper wall with shown in the joint of joint, described outer guide plate and described sidewall of spiral case sidewall all adopt arc transition; Can avoid stress to concentrate, guarantee the structural stability of whole exhaust casing.
The Flow area of described runner 33 expands gradually along the flow direction of steam; The final stage exhaust of small steam turbine is entered can form diffusion significantly after exhaust casing to flow, streamwise Speed Reduction, pressure raise.
Certainly, above-mentioned explanation is not limitation of the utility model, and the utility model is also not limited to above-mentioned giving an example; those skilled in the art; in scope of the present utility model, the variation of making, change and add or replace, all should belong to protection domain of the present utility model.
Claims (4)
1. a discharge cylinder of steam turbine, comprises that a spiral case, is arranged on the rotor of described spiral case axial centre, and is arranged on the Diffuser in described spiral case; It is characterized in that: described spiral case is enclosed and made by upper wall and sidewall, and its axial width is greater than the width of described Diffuser; Described Diffuser comprises interior guide plate and outer guide plate, between interior guide plate and outer guide plate, forms runner; Described outer guide plate is arranged on the sidewall of described spiral case; Described interior guide plate is arranged in spiral case, and its structure is quadrant segmental arc; The upside of described spiral case and downside are respectively arranged with two stiffening ribs; The middle part of described spiral case is symmetrically arranged with two reinforcing props.
2. discharge cylinder of steam turbine according to claim 1, it is characterized in that: four rectangular structural configuration of stiffening rib in described spiral case are in spiral case, wherein, two stiffening ribs of spiral case upside and two stiffening ribs of spiral case downside are arranged symmetrically with the horizontal line at spiral case center, and two stiffening ribs of spiral case upside or downside are arranged symmetrically with the vertical curve at spiral case center.
3. discharge cylinder of steam turbine according to claim 1, is characterized in that: described spiral case upper wall with shown in the joint of joint, described outer guide plate and described sidewall of spiral case sidewall all adopt arc transition.
4. discharge cylinder of steam turbine according to claim 1, is characterized in that: the Flow area of described runner expands gradually along the flow direction of steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420118593.7U CN203939533U (en) | 2014-03-17 | 2014-03-17 | A kind of discharge cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420118593.7U CN203939533U (en) | 2014-03-17 | 2014-03-17 | A kind of discharge cylinder of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203939533U true CN203939533U (en) | 2014-11-12 |
Family
ID=51858855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420118593.7U Expired - Fee Related CN203939533U (en) | 2014-03-17 | 2014-03-17 | A kind of discharge cylinder of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203939533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952821A (en) * | 2018-09-25 | 2018-12-07 | 中国船舶重工集团公司第七0三研究所 | A kind of fixed marine turbing deflector structure |
| CN110462167A (en) * | 2017-07-13 | 2019-11-15 | 三菱日立电力系统株式会社 | Steam turbine system |
-
2014
- 2014-03-17 CN CN201420118593.7U patent/CN203939533U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110462167A (en) * | 2017-07-13 | 2019-11-15 | 三菱日立电力系统株式会社 | Steam turbine system |
| CN108952821A (en) * | 2018-09-25 | 2018-12-07 | 中国船舶重工集团公司第七0三研究所 | A kind of fixed marine turbing deflector structure |
| CN108952821B (en) * | 2018-09-25 | 2023-12-08 | 中国船舶重工集团公司第七0三研究所 | Fixed marine steam turbine guide plate structure |
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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 |
Granted publication date: 20141112 Termination date: 20170317 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |