CN103133065A - Turbine outer edge internal surface dewetting partition plate - Google Patents
Turbine outer edge internal surface dewetting partition plate Download PDFInfo
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- CN103133065A CN103133065A CN2011103886947A CN201110388694A CN103133065A CN 103133065 A CN103133065 A CN 103133065A CN 2011103886947 A CN2011103886947 A CN 2011103886947A CN 201110388694 A CN201110388694 A CN 201110388694A CN 103133065 A CN103133065 A CN 103133065A
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- dividing plate
- outer rim
- internal surface
- hydrophobic
- partition plate
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Abstract
The invention discloses a novel turbine outer edge internal surface dewetting partition plate which comprises a partition plate body, a plurality of stator blades, a partition plate out edge and the like. The turbine outer edge internal surface dewetting partition plate is characterized in that a plurality of convex shoulders and grooves are formed in the internal surface of the partition plate out edge, condensation water drop collection faces with gradients are arranged on the upper portions of the convex shoulders, and meanwhile an expedite dewatering drainage channel is arranged in the partition plate out edge. The defects that the internal surface of a partition plate out edge does not have the function of dewatering and is the main reason for causing the fact that resilient water drops are produced in the prior art are overcome. By means of the turbine outer edge internal surface dewetting partition plate, the fact that the resilient water drops enter a moving blade area after being produced can be avoided, the humidity of wet steam is effectively reduced, efficiency of a turbine is markedly improved, and service life of moving blades is prolonged. The novel turbine outer edge internal surface dewetting partition plate is applicable to a saturated steam turbine, a condensing steam turbine, a nuclear power station steam turbine and the like.
Description
Technical field
The present invention relates to a kind of partition board of steam turbine, more particularly, the present invention relates to a kind of steam turbine outer rim internal surface dividing plate that dries.
Background technique
Partition board of steam turbine is steam turbine partition at different levels, in order to fixing steam turbine stator blades at different levels with stop interstage leakage, and the through-flow part of steam turbine is separated into several levels.Dividing plate mainly is comprised of several parts such as partition body, stator blade and dividing plate outer rims.
The at different levels and common multi-stage condensing type steam turbine of saturated steam turbine last what, because they are all worked in the wet vapor zone, so inevitably will produce the wet steam loss.The dividing plate that present steam turbine uses, the internal surface of its dividing plate outer rim all adopts the smooth surface of " conical surface shape " and " cylindrical shape ", with regard to smooth surface itself, does not have the function of drying.Progress and development along with science and technology, the level of working in the wet vapor zone, the globule that enters in the movable vane zone can be divided into the condense globule and the bounce-back globule two parts, and the globule that wherein rebounds should be smooth surface institute extremely, and this viewpoint will progressively be familiar with to some extent and grasp by people.In structural design in the past, for the efficient that improves wet steam stages with alleviate the degree that moving vane is damaged by globule erosion, although also adopted by catch the mouth of a river, catch hydroecium, water catcher in level that hydrophobic channel forms, with the moisture-catchers such as hollow blade with suction seam, but, the effect of drying has certain narrow limitation, and there is following shortcoming in its existing partition board of steam turbine.
1, in existing technology, the internal surface of dividing plate outer rim is smooth surface, and not only itself does not possess the function of drying, and is again the basic reason that causes the bounce-back globule to form on the contrary.A large amount of like this globules will enter the movable vane district, and steam turbine is done negative work, and turbine efficiency is reduced.Simultaneously, also can make moving vane be subject to globule erosion and damaged.
Although 2 in existing technology, the ability that corrodes in order to improve blade opposing water droplet, back of the body arc side at blade top leading edge is usually carried out surface Hardening Treatment, namely table face plating Chrome, local high-frequency harden, electro discharge hardening, nitrogenize, weldering cemented carbide etc., played certain effect although blade is supported erosion-resistant ability.But, but can not effectively reduce the humidity of steam.Can not solve from the source, extend the working life of blade and improve turbine efficiency.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of existing partition board of steam turbine, a kind of new steam turbine outer rim internal surface dividing plate that dries is provided.
To achieve these goals, the invention provides a kind of steam turbine outer rim internal surface dividing plate that dries.Comprise partition body, a plurality of stator blade and dividing plate outer rim etc.
Described dividing plate outer rim, his internal surface comprise convex shoulder and the groove that a plurality of convex-concaves are alternate, and described convex shoulder comprises the globule collection surface that condenses on convex shoulder top; Described groove comprises hydrophobic collecting tank and the hydrophobic stop-return slot of groove bottom; Described hydrophobic stop-return slot comprises the dash convex shoulder.The dash convex shoulder is arranged on the circumference place, edge of hydrophobic stop-return slot.
Described dividing plate outer rim comprises a plurality of hydrophobic leadout holes and at least one drain discharge hole.One end of described hydrophobic leadout hole is connected with hydrophobic collecting tank, and the other end is connected with the drain discharge hole, and its effect is that the water of condensation in hydrophobic collecting tank is discharged; Straight tube shape or bend pipe shape can according to the structure needs of dividing plate outer rim, be arranged in described drain discharge hole.
Described dividing plate outer rim comprises that at least one decompression forms the hole.The end that decompression forms the hole is connected with dividing plate drain discharge hole, and the other end and dividing plate front-end face connect, and its effect is to make the interior pressure of drain discharge bore region a little less than the relevant pressure in dividing plate through-flow zone, is conducive to the unimpeded of draining.
The handing-over end of described stator blade and dividing plate outer rim can have two kinds of junction forms, and when the receiving delivery system of stator blade and dividing plate outer rim was realized with Type of Welding, the shape line that its geometric form line should be corresponding with the dividing plate outer rim was complementary; When the receiving delivery system of stator blade and dividing plate outer rim is realized with embedded part castingin form, the corresponding hydrophobic collecting tank of the top of stator blade and dividing plate outer rim internal surface and hydrophobic stop-return slot part, corresponding hole should be arranged, thereby guarantee the circumferential connection of hydrophobic collecting tank and hydrophobic stop-return slot.
The steam turbine outer rim internal surface of the present invention dividing plate that dries has adopted the structure of drying of dividing plate outer rim internal surface, overcomes and has made up in original technology, and itself does not possess the function of drying the internal surface of dividing plate outer rim.Its maximum characteristics are: the every bit place on the internal surface of dividing plate outer rim, all have the effect that carbonated drink is separated, and be equivalent to be equipped with numerous steam-water separator on dividing plate.Its effect of drying will improve greatly.Use the outer rim internal surface dividing plate that dries, can more effectively reduce the humidity of wet vapor, improve the efficient of stage, extend the working life of moving vane.The present invention is applicable to saturated steam turbine, condensing steam turbine, also is applicable to steam turbine for nuclear power station etc. simultaneously.
Description of drawings
Fig. 1 is the dry structural representation of dividing plate of steam turbine outer rim internal surface of the present invention.
Fig. 2 is A-A shown in Figure 1 to the dry cross section view of dividing plate of outer rim internal surface.
Fig. 3 is the end view of the handing-over end of stator blade and dividing plate outer rim.
In figure: the 1 steam turbine outer rim internal surface dividing plate that dries, 2 dividing plate outer rims, 3 stator blades,
4 horizontal flanges, 5 partition bodies, 6 dividing plate outer rim internal surfaces,
7 convex shoulders, 8 globule collection surfaces that condense, 9 dash convex shoulders,
10 hydrophobic stop-return slots, 11 grooves, 12 hydrophobic collecting tanks,
13 hydrophobic leadout holes, 14 drain discharge holes, 15 decompressions form the hole,
16 drain discharge points, the geometric form line at 17 stator blade tops.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, the steam turbine outer rim internal surface of the present invention dividing plate 1 that dries is to be divided into the up and down two halves with horizontal flange 4, is comprised of partition body 5, a plurality of stator blade 3 and dividing plate outer rim 2.The steam turbine outer rim internal surface dividing plate 1 that dries comprises a dividing plate outer rim 2, is provided with a plurality of convex-concaves alternate convex shoulder 7 and groove 11 on the internal surface 6 of this dividing plate outer rim 2, and this is core of the present invention.Meet the vapour side on the top of this convex shoulder 7 and be provided with the globule collection surface 8 that condenses with inclination, the surface of the globule collection surface 8 that condenses is the inverse toroidal conical surface, and effect is the globule that condenses of collecting in wet vapor, enters the movable vane district after the globule of avoiding rebounding produces; Be provided with hydrophobic collecting tank 12 in the bottom of groove 11, the effect of hydrophobic collecting tank 12 is used for collecting hydrophobic, be provided with the hydrophobic stop-return slot 10 of axial indent at the root of front end (admission) side of hydrophobic collecting tank 12, be provided with dash convex shoulder 9 in the edge of hydrophobic stop-return slot 10.The effect of hydrophobic stop-return slot 10 and dash convex shoulder 9 is all to stop hydrophobic again returning to form the bounce-back globule in steam with rice.
Steam turbine outer rim internal surface of the present invention dries in dividing plate 1, comprises a dividing plate outer rim 2, and a plurality of hydrophobic leadout holes 13 and at least one drain discharge hole 14 are set in this dividing plate outer rim 2.One end of hydrophobic leadout hole 13 is connected with hydrophobic collecting tank 12, and the other end is connected with drain discharge hole 14, and its effect is that the water of condensation in hydrophobic collecting tank 12 is discharged; Straight tube shape or bend pipe shape can according to the structure needs of dividing plate outer rim, be arranged in drain discharge hole 14.For the water of condensation that is conducive in hydrophobic collecting tank 12 is discharged unimpeded, at least one decompression is set in dividing plate outer rim 2 forms hole 15, the end that decompression forms hole 15 is connected with drain discharge hole 14, the other end and dividing plate front-end face connect, its effect is to make pressure in 14 zones, drain discharge hole a little less than the relevant pressure in dividing plate through-flow zone, is conducive to hydrophobic discharging.
As shown in Figure 3, in the present invention, the handing-over end of stator blade 3 and dividing plate outer rim 2, their receiving delivery system can adopt Type of Welding and two kinds of methods of embedded part castingin form to realize, when stator blade 3 was realized with Type of Welding with the receiving delivery system of dividing plate outer rim 2, the geometric form line 17 at stator blade 3 tops should be complementary by the shape line corresponding with dividing plate outer rim internal surface 6; When stator blade 3 was realized with embedded part castingin form with the receiving delivery system of dividing plate outer rim 2, the top of stator blade 3 and the corresponding hydrophobic collecting tank 12 of dividing plate outer rim internal surface 6 and hydrophobic stop-return slot 10 parts should have corresponding hole.In a word, should guarantee the circumferential connection of hydrophobic collecting tank 12 and hydrophobic stop-return slot 10.
In order to facilitate steam turbine outer rim internal surface dry processing and the manufacturing of dividing plate, can be different according to the structure of the dividing plate that dries, pre-formed in advance first hydrophobic leadout hole 13, drain discharge hole 14 and negative pressure shape pore-forming 15, then pre-buriedly cast in dividing plate outer rim 2.
The steam turbine outer rim internal surface of the present invention dividing plate that dries.Can more effectively remove the moisture in wet vapor, reduce the humidity of wet vapor, it is realized by following manner:
Steam expands to do work in steam turbine and makes the turbine rotor High Rotation Speed, condense the globule under the effect of centrifugal force in wet vapor, be thrown toward on the internal surface 6 of dividing plate outer rim, after striking on the globule collection surface 8 that condenses with inverse toroidal conical surface, the globule is rebounded, enter hydrophobic collecting tank 12 and hydrophobic stop-return slot 10, the water of condensation that is collected into flows to hydrophobic leadout hole 13 through annular hydrophobic collecting tank 12, then flow to drain discharge point 16 via drain discharge hole 14, finally put 16 by drain discharge and discharge.Thereby avoided the bounce-back globule to enter phenomenon in the movable vane zone after bounce-back, reduced the humidity of steam, realized improving the efficient of steam turbine, extended the blade purpose in working life.
Claims (5)
1. the invention provides a kind of new steam turbine outer rim internal surface dividing plate that dries, comprise partition body (5), a plurality of stator blade (3) and dividing plate outer rim (2); it is characterized in that, the internal surface (6) of this dividing plate outer rim (2) is provided with the alternate convex shoulder of a plurality of convex-concaves (7) and groove (11), the top of described convex shoulder (7) is met the vapour side and is provided with the globule collection surface (8) that condenses with inclination, the condense surface of globule collection surface (8) is the inverse toroidal conical surface, the bottom of described groove (11) is provided with hydrophobic collecting tank (12), the root of front end (admission) side of described hydrophobic collecting tank (12) is provided with the hydrophobic stop-return slot (10) of axial indent, and be provided with dash convex shoulder (9) in the edge of hydrophobic stop-return slot (10).
2. the steam turbine outer rim internal surface according to claim 1 dividing plate that dries, is characterized in that described dividing plate outer rim (2), is provided with a plurality of hydrophobic leadout holes (13) and at least one drain discharge hole (14); One end of hydrophobic leadout hole (13) is connected with hydrophobic collecting tank (12), the other end is connected with drain discharge hole (14), and be provided with at least one decompression form hole (15) in dividing plate outer rim (2), the end that decompression forms hole (15) is connected with drain discharge hole (14), and the other end and dividing plate front-end face connect.
3. the steam turbine outer rim internal surface according to claim 1 dividing plate that dries, the handing-over end that it is characterized in that described stator blade (3) and dividing plate outer rim (2), their receiving delivery system can adopt two kinds of methods of Type of Welding or embedded part castingin form to realize: when stator blade (3) was realized with Type of Welding with the receiving delivery system of dividing plate outer rim (2), the geometric form line (17) at stator blade (3) top should be complementary by the shape line corresponding with dividing plate outer rim internal surface (6); When stator blade (3) is realized with embedded part castingin form with the receiving delivery system of dividing plate outer rim (2), the top of stator blade (3) and the corresponding hydrophobic collecting tank of dividing plate outer rim internal surface (6) (12) and hydrophobic stop-return slot (10) part, corresponding hole should be arranged, in a word, should guarantee the circumferential connection of hydrophobic collecting tank (12) and hydrophobic stop-return slot (10).
4. the steam turbine outer rim internal surface according to claim 3 dividing plate that dries, it is characterized in that, when with the handing-over of described Type of Welding, the processing geometric form line (17) at stator blade (3) top should be complementary with the corresponding shape line of dividing plate outer rim internal surface (6); When with the handing-over of described embedded part castingin form, the processing geometrical shape at stator blade (3) top should have corresponding hole, thereby guarantee the circumferential connection of hydrophobic collecting tank (12) and hydrophobic stop-return slot (10).
5. the steam turbine outer rim internal surface according to claim 2 dividing plate that dries, it is characterized in that described hydrophobic leadout hole (13), drain discharge hole (14) and decompression form the processing mode in hole (15), can be different according to the structure of the dividing plate that dries, first hydrophobic leadout hole (13), drain discharge hole (14) and negative pressure shape pore-forming (15), pre-formed in advance, then pre-buriedly cast in dividing plate outer rim (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110388694.7A CN103133065B (en) | 2011-11-30 | 2011-11-30 | Steam turbine outer rim internal surface dries dividing plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110388694.7A CN103133065B (en) | 2011-11-30 | 2011-11-30 | Steam turbine outer rim internal surface dries dividing plate |
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| CN103133065A true CN103133065A (en) | 2013-06-05 |
| CN103133065B CN103133065B (en) | 2015-09-09 |
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| CN201110388694.7A Expired - Fee Related CN103133065B (en) | 2011-11-30 | 2011-11-30 | Steam turbine outer rim internal surface dries dividing plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452606A (en) * | 2013-08-05 | 2013-12-18 | 国家电网公司 | Novel steam turbine |
| CN116713173A (en) * | 2023-08-10 | 2023-09-08 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Solid mineral product separation screening equipment for geological survey |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677841B (en) * | 2017-03-01 | 2018-07-10 | 华北电力大学（保定） | A kind of isolating device and steam turbine last stage humidity detector |
Citations (5)
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| GB382936A (en) * | 1931-08-25 | 1932-11-03 | Asea Ab | Improvements in steam turbines |
| FR2400614A1 (en) * | 1977-08-19 | 1979-03-16 | Creusot Loire | Water droplet extractor for multistage turbine - uses guide vanes to impart swirling motion to steam for removing droplets centrifugally |
| CN1277652A (en) * | 1997-11-03 | 2000-12-20 | 西门子公司 | Turbine housing and method for producing the same |
| EP2128386A2 (en) * | 2008-05-30 | 2009-12-02 | Siemens Aktiengesellschaft | Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine |
| JP2010031723A (en) * | 2008-07-28 | 2010-02-12 | Mitsubishi Heavy Ind Ltd | Steam turbine |
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2011
- 2011-11-30 CN CN201110388694.7A patent/CN103133065B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| GB382936A (en) * | 1931-08-25 | 1932-11-03 | Asea Ab | Improvements in steam turbines |
| FR2400614A1 (en) * | 1977-08-19 | 1979-03-16 | Creusot Loire | Water droplet extractor for multistage turbine - uses guide vanes to impart swirling motion to steam for removing droplets centrifugally |
| CN1277652A (en) * | 1997-11-03 | 2000-12-20 | 西门子公司 | Turbine housing and method for producing the same |
| EP2128386A2 (en) * | 2008-05-30 | 2009-12-02 | Siemens Aktiengesellschaft | Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine |
| JP2010031723A (en) * | 2008-07-28 | 2010-02-12 | Mitsubishi Heavy Ind Ltd | Steam turbine |
Non-Patent Citations (3)
| Title |
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| 刘建成 等: "汽轮机内部除湿技术的发展", 《热能动力工程》 * |
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| 栾红卫 等: "核电厂汽轮机除湿及防蚀技术的研究", 《科技信息(学术研究)》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452606A (en) * | 2013-08-05 | 2013-12-18 | 国家电网公司 | Novel steam turbine |
| CN103452606B (en) * | 2013-08-05 | 2015-05-13 | 国家电网公司 | Novel steam turbine |
| CN116713173A (en) * | 2023-08-10 | 2023-09-08 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Solid mineral product separation screening equipment for geological survey |
| CN116713173B (en) * | 2023-08-10 | 2023-10-10 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Solid mineral product separation screening equipment for geological survey |
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| CN103133065B (en) | 2015-09-09 |
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Granted publication date: 20150909 Termination date: 20181130 |