CN209761502U - Hollow partition plate of dehumidification grade for steam turbine - Google Patents
Hollow partition plate of dehumidification grade for steam turbine Download PDFInfo
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- CN209761502U CN209761502U CN201920719254.7U CN201920719254U CN209761502U CN 209761502 U CN209761502 U CN 209761502U CN 201920719254 U CN201920719254 U CN 201920719254U CN 209761502 U CN209761502 U CN 209761502U
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- blade
- dehumidification
- outer ring
- steam turbine
- hollow
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Abstract
the utility model provides a hollow baffle of dehumidification level for steam turbine, belongs to the steam turbine field of dehumidification, concretely relates to steam turbine dehumidification baffle. The purpose is in order to solve the poor problem of traditional steam turbine dehumidification baffle dehumidification effect. A hollow baffle outside-in of dehumidification level for steam turbine do in proper order: an outer ring, blades, and an inner ring; the inner part of the outer ring, the inner part of the blade and the inner part of the inner ring are all cavities which are communicated; the bottom of the outer ring is provided with a drainage hole which is communicated with the inner cavity of the outer ring; the outer surface of the hollow blade is provided with a dehumidification groove, and the dehumidification groove is communicated with the cavity in the blade. A steam turbine is with hollow baffle wet efficient of dehumidification level, and processing is simple.
Description
Technical Field
The utility model belongs to steam turbine dehumidification field, concretely relates to steam turbine dehumidification baffle.
Background
Traditional steam turbine dehumidification baffle is mostly quiet leaf surface fluting structure, and a set of certain length's radial recess is seted up to the position that this kind of structure is close to out the steam limit at quiet leaf surface pressure face, and the water film is caught when flowing through this dehumidification groove to flow to hollow outer loop through the recess under the effect of pressure differential, and through the hydrophobic position behind the suction hole flow direction level.
In the structure, each blade is only provided with one group of dehumidification grooves, and the water drop capturing capability is poor. And only the dehumidification groove is arranged, an internal suction channel is not provided, the steam in the dehumidification groove is difficult to form a stable and closed flow field under the blowing of the steam flowing on the surface of the blade, and the captured water drops are difficult to smoothly flow to the position of the suction hole under the turbulent flow field and the flow resistance of the water drops, and easily enter the main steam flow again to damage the movable blade.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing a hollow baffle of dehumidification level for steam turbine in order to solve the poor problem of traditional steam turbine dehumidification baffle dehumidification effect.
A steam turbine include with removing wet level hollow partition: the outer ring, the blades and the inner ring are sequentially arranged from outside to inside;
The inner part of the outer ring, the inner part of the blade and the inner part of the inner ring are all cavities which are communicated;
The bottom of the outer ring is provided with a drainage hole which is communicated with the inner cavity of the outer ring;
the outer surface of the blade is provided with a dehumidification groove which is communicated with the cavity inside the blade.
Furthermore, the inner arc side dehumidification groove on the outer surface of the blade is located at a position close to the air outlet side, and the back arc side dehumidification groove is located at a position with the same pressure as the inner arc.
Further, the blade comprises a blade main body and a blocking plate, and a hollow cavity of the hollow blade is formed between the blade main body and the blocking plate.
Further, the outer ring comprises an outer ring main body and a blocking plate, and a cavity of the outer ring is formed between the outer ring main body and the blocking plate.
Further, the inner ring comprises an inner ring main body and a blocking plate, and a cavity of the inner ring is formed between the inner ring main body and the blocking plate.
The utility model discloses be hollow structure with the inside and outside ring design of steam turbine dehumidification baffle, baffle quiet leaf cavity simultaneously sets up the dehumidification groove in the position that the blade pressure surface is close to out the vapour limit and the position that the suction surface is close to the admission limit, and the dehumidification groove links to each other with blade inner cavity. The water film is captured by the dehumidification groove when flowing through the dehumidification groove, and enters the blade inner cavity through the dehumidification groove, the liquid drops captured by the upper half part of the partition plate flow to the inner ring through the blade inner cavity, flow to the blade inner cavity of the lower half part of the partition plate through the inner ring and then flow to the outer ring, and are collected to the drain hole at the bottom of the outer ring; the liquid drops captured by the lower half part of the partition plate flow to the outer ring through the inner cavity of the blade, are collected to the drainage hole at the bottom of the outer ring and are guided away through the drainage device.
Because the inner cavity of the blade is connected with the partition plate through the inner cavity of the outer ring and the water drainage holes in the outer ring, and because pressure difference exists in front of and behind the partition plate, the structure enables the pressure difference to exist between the inner cavity of the blade (which can be considered as being equal to the back of the partition plate) and the flow channel of the static blade, and water drops are sucked into the inner cavity of the blade and guided away under the action of the pressure difference. The steam speed of the whole dehumidification groove is increased along the leaf height, and the water drop carrying capacity is stronger; the water drops which are not pumped away can be collected to the inner ring cavity of the partition plate through the cavity of the lower half part of the blade under the action of gravity, so that the dehumidification efficiency is greatly improved, and the moving blade can be well protected from the water erosion influence of the secondary water drops.
drawings
Fig. 1 is a schematic structural view of the upper half of a dehumidifying-stage hollow partition for a steam turbine according to the present invention, wherein 1 is an outer ring, 2 is a blade, 3 is an inner ring, 21 is a dehumidifying groove, 23 is a blade blocking plate, and 24 is a blade main body;
FIG. 2 is a schematic diagram of an outer ring structure, in which 11 is an outer ring main body, 12 is a blocking plate, 13 is a hydrophobic hole, and 14 is a fabrication hole;
FIG. 3 is a schematic view of an inner ring structure, wherein 31 is an inner ring main body, and 32 is a blocking plate;
FIG. 4 is a schematic view of a blade configuration;
FIG. 5 is a cross-sectional view of a blade wherein 22 represents the blade internal cavity, 25 represents the inner arc side, and 26 represents the back arc side;
FIG. 6 is a schematic view of the overall structure of the hollow partition;
Fig. 7 is a schematic view of the dehumidification principle of the hollow partition, in which 4 denotes a water film, 5 denotes a steam flow, 6 denotes secondary water droplets, 7 denotes a rotor blade, and 8 denotes a water erosion position.
Detailed Description
The first embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 7. The embodiment provides a hollow partition plate of dehumidification level for steam turbine include: the outer ring 1, the blades 2 and the inner ring 3 are arranged from outside to inside in sequence;
The inner part of the outer ring, the inner part of the blade and the inner part of the inner ring are all cavities which are communicated;
The bottom of the outer ring is provided with a drainage hole 13, as shown in fig. 6, the drainage hole is communicated with the inner cavity of the outer ring;
The outer surface of the blade is provided with a dehumidification slot 21 communicating with the blade internal cavity 22.
The inner arc side dehumidification groove on the outer surface of the blade is positioned at a position close to the gas outlet side, and the back arc side dehumidification groove is positioned at a position close to the inner arc pressure.
The blade comprises a blade main body 24 and a blocking plate 23, and a hollow cavity of the hollow blade is formed between the blade main body and the blocking plate.
the outer ring comprises an outer ring main body 11 and a blocking plate 12, and a cavity of the outer ring is formed between the outer ring main body and the blocking plate.
the inner ring comprises an inner ring main body 31 and a blocking plate 32, and a cavity of the inner ring is formed between the inner ring main body and the blocking plate.
In the present embodiment, the blade is hollow, and as shown in fig. 5, a die-forged structure is adopted. The blade is divided into a blade main body and a blocking plate, as shown in fig. 4, the blade main body is fixed by a die to be forged and formed, and meanwhile, the hollow part of the blade main body is forged, and the hollow part of the top part is larger than that of the root part. The surface of the blade is provided with a dehumidification groove, the inner arc side dehumidification groove is as close as possible to the steam outlet side, and the back arc side dehumidification groove is arranged close to the inner arc pressure, as shown in fig. 5. The blocking plates of the inner ring and the outer ring also adopt die forging structures, and can also be formed by punching steel plates under the condition of meeting the strength. And machining the blade main body and the blocking plate, welding and assembling, finally machining and polishing the inner back arc and the welding line, and machining the inner back arc hydrophobic groove by using electric pulse or laser after fine work. The inner ring and the outer ring are directly welded with the blades. In order to drain water in the blades, the outer ring is designed into a hollow structure, and the outer ring can be designed into a mode that the outer ring main body is welded with a steel plate (a blocking plate) because the width of the outer ring is larger, as shown in figure 2. The inner ring is also designed to be a hollow structure, but the width of the inner ring is smaller, and the inner ring can be designed to be in a mode that the inner ring main body is welded with a steel plate or a mode that the steel plate is welded with the steel plate, as shown in figure 3.
Claims (5)
1. a hollow separator plate for a steam turbine, said separator plate comprising: the outer ring, the blades and the inner ring are arranged from outside to inside in sequence;
The inner part of the outer ring, the inner part of the blade and the inner part of the inner ring are all cavities which are communicated;
the bottom of the outer ring is provided with a drainage hole which is communicated with the inner cavity of the outer ring;
The outer surface of the blade is provided with a dehumidification groove which is communicated with the cavity inside the blade.
2. A dehumidifying stage hollow partition plate for a steam turbine as claimed in claim 1, wherein the inner-arc side dehumidifying groove is located near the outlet side of the outer surface of the blade, and the back-arc side dehumidifying groove is located at the same pressure as the inner arc.
3. A dehumidifying stage hollow partition panel for steam turbines as claimed in claim 1 or 2 wherein said blade comprises a main blade body and a bulkhead between which a hollow cavity of the hollow blade is formed.
4. A dehumidifying grade hollow partition plate for steam turbines as claimed in claim 1 or 2 wherein said outer ring comprises two parts, an outer ring body and a closure plate, a cavity of the outer ring is formed between said outer ring body and said closure plate.
5. A dehumidifying grade hollow partition plate for steam turbines as claimed in claim 1 or 2 wherein said inner ring comprises two parts, an inner ring body and a closure plate, and a cavity of the inner ring is formed between said inner ring body and said closure plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719254.7U CN209761502U (en) | 2019-05-16 | 2019-05-16 | Hollow partition plate of dehumidification grade for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719254.7U CN209761502U (en) | 2019-05-16 | 2019-05-16 | Hollow partition plate of dehumidification grade for steam turbine |
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| Publication Number | Publication Date |
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| CN209761502U true CN209761502U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920719254.7U Active CN209761502U (en) | 2019-05-16 | 2019-05-16 | Hollow partition plate of dehumidification grade for steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030039A (en) * | 2019-05-16 | 2019-07-19 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine dehumidifying grade hollow shelf |
-
2019
- 2019-05-16 CN CN201920719254.7U patent/CN209761502U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030039A (en) * | 2019-05-16 | 2019-07-19 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine dehumidifying grade hollow shelf |
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