CN220687415U - Efficient drainage structure of low-pressure final-stage partition plate of steam turbine - Google Patents
Efficient drainage structure of low-pressure final-stage partition plate of steam turbine Download PDFInfo
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- CN220687415U CN220687415U CN202322508083.2U CN202322508083U CN220687415U CN 220687415 U CN220687415 U CN 220687415U CN 202322508083 U CN202322508083 U CN 202322508083U CN 220687415 U CN220687415 U CN 220687415U
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- steam turbine
- drain
- outer ring
- steam
- pressure final
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- 238000005192 partition Methods 0.000 title claims description 22
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 210000004907 gland Anatomy 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 5
- 239000005871 repellent Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a high-efficiency drainage structure of a low-pressure final-stage baffle plate of a steam turbine, which relates to the technical field of steam turbines, in particular to a high-efficiency drainage structure of a low-pressure final-stage baffle plate of a steam turbine, comprising a baffle plate, wherein the baffle plate comprises an inner ring, a blade and an outer ring which are sequentially arranged outwards from the axis of the steam turbine, a blade top steam seal is arranged on the air outlet side of the outer ring, and a drainage groove for draining water out of the baffle plate is arranged at one end part of the outer ring or/and the blade top steam seal close to the axis; the beneficial effects are that: the centrifugal force and the pressure difference generated during the rotation of the steam turbine are utilized, the generated hydrophobic water can be effectively discharged, the dehumidifying effect inside the steam turbine can be greatly improved, and the damage to the blades of the steam turbine is prevented.
Description
Technical Field
The utility model relates to the technical field of steam turbines, in particular to a high-efficiency drainage structure of a low-pressure final-stage partition plate of a steam turbine.
Background
The steam turbine partition board is installed in the cylinder to divide the cylinder into a plurality of chambers with different pressures, and the steam turbine partition board is mainly used for installing nozzles or static blades and preventing interstage steam leakage. When the steam working medium flows through the stationary blades arranged on the partition plate, potential energy is converted into kinetic energy, the pressure is reduced, the speed is increased, and then the steam working medium enters the moving blades to promote the rotor to do work.
In actual operation, the working temperature of the steam turbine can be gradually reduced along with the blades, the first stage is about 400 ℃, and the temperature of the low-pressure final stage can be reduced to about 100 ℃. The steam can form the water film when the last-stage stationary blade meets cold, and the water film can be scattered along the baffle under the pressure effect, if the steam humidity is too big, can lead to the existence ponding phenomenon in the steam turbine cylinder, because the high-speed rotation of steam turbine rotor, ponding can cause the water hammer to make the blade take place the water erosion. The utility model provides a high-efficiency dehumidification method for a low-pressure final-stage partition plate.
The baffle is installed in the recess of cylinder inner wall, generally falls into upper and lower two halves, strides on the pivot, and the pivot passes from its center, and water film in traditional steam turbine is scattered along the baffle under the pressure effect, and dehumidification effect is limited, "a dehumidification level hollow baffle for steam turbine" of CN209761502U description, carries out the drainage through setting up the hydrophobic hole with blade cavity intercommunication on the outer loop, and this kind of setting up method can change blade structure, probably produces the influence to the blade balance, and can not effectually discharge and pile up the hydrophobic that gathers at the baffle edge, causes the water hammer easily when the blade starts.
Disclosure of Invention
The utility model aims to provide a high-efficiency hydrophobic structure of a low-pressure final-stage baffle plate of a steam turbine, so as to solve the problems in the background art.
The technical scheme adopted by the utility model is as follows: the utility model provides a high-efficient hydrophobic structure of steam turbine low pressure final stage baffle, includes the baffle, and the baffle includes the inner ring, blade and the outer loop that outwards set gradually by the steam turbine axle center, and the side of giving vent to anger of outer loop is provided with the top gland, and the outer loop or/and top gland are close to the one end of axle center and are provided with the hydrophobic groove that is used for discharging the baffle with the drainage.
Further, the drain groove is arranged on the joint surface of the outer ring and the blade top steam seal, and the opening of the drain groove is arranged on one side, close to the axis, of the outer ring and the blade top steam seal.
Further, the drain groove is arranged in the blade top steam seal, and the drain groove opening is arranged on one side of the blade top steam seal, which is close to the axis of the steam turbine.
Further, the drain groove is arranged in the outer ring, and the drain groove opening is arranged on one side of the outer ring, which is close to the axis of the steam turbine.
Further, the surface of the drain groove opening is provided as a curved surface for facilitating the flow of drain water into the drain groove opening.
Further, the drain end of the drain tank is connected with the lower part of the cylinder body, and the lower part of the cylinder body is provided with a condenser.
Further, the inner side surface of the drain groove is provided with a smooth surface.
Further, the drain grooves are arranged in a plurality according to the humidity and the flow rate of the steam of the partition plate.
Further, the inner side surface of the drain groove is provided with an inclined surface which can smoothly drain the drain water from the drain end by the internal pressure of the partition plate.
Further, the blade top steam seal is connected with the outer ring through bolts, and the drain grooves are arranged in a staggered mode with the bolts.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows: according to the high-efficiency dehumidifying structure of the low-pressure final-stage partition plate of the steam turbine, the water film of the blade can directly enter the lower half of the air cylinder along the water drain groove or the water drain channel under the pressure effect, so that the water film enters the condenser along the water drain hole of the lower half of the air cylinder, the generated water drain can be effectively discharged by utilizing the centrifugal force and the pressure difference generated when the steam turbine rotates, the dehumidifying effect inside the steam turbine can be greatly improved, and the damage to the blade of the steam turbine is prevented.
Drawings
FIG. 1 is a schematic view of the hydrophobic structure of the low pressure final separator of the present utility model;
FIG. 2 is a schematic view of a tip gland seal according to the present utility model;
FIG. 3 is a schematic view of an outer ring and tip gland seal according to the present utility model;
FIG. 4 is a schematic diagram of the position of the drain tank according to the present utility model.
The marks in the figure: the device comprises a 1-outer ring, 2-blades, a 3-inner ring, a 4-blade top steam seal, a 5-drain tank, a 51-opening and 6-bolts.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
In this embodiment, as shown in fig. 1, a high-efficiency water-repellent structure of a low-pressure final-stage diaphragm of a steam turbine includes a diaphragm, the diaphragm includes an inner ring 3, a blade 2 and an outer ring 1 which are sequentially arranged outwards from the axis of the steam turbine, a blade top steam seal 4 is arranged at the air outlet side of the outer ring 1, a water-repellent groove 5 for draining water is arranged at one end part of the outer ring 1 or/and the blade top steam seal 4 close to the axis, which is used for draining water from the water-repellent groove 5 arranged at one side close to the axis due to obvious temperature drop at the final-stage diaphragm of the steam turbine, and a water-repellent groove 5 for draining water is arranged at one end part of the outer ring 1 or/and the blade top steam seal 4 close to the axis by utilizing centrifugal force generated by rotation of the blade 2 of the steam turbine and pressure difference with the outside, so that water can be smoothly drained outwards from the water-repellent groove 5 arranged at one side close to the axis;
in this embodiment, as shown in fig. 3, the water drain groove 5 is disposed on the joint surface of the outer ring 1 and the top steam seal 4, and the water drain groove opening 51 is disposed on one side of the outer ring 1 and the top steam seal 4 close to the axis, because the joint of the outer ring 1 and the top steam seal 4 has a seam, the water drain is easy to accumulate and stay in the joint, so that the water drain groove 5 is disposed at the joint of the outer ring 1 and the top steam seal 4, the water drain groove 5 is formed by folding U-shaped grooves formed in the steam seals of the outer ring 1 and the top steam seal 2, the opening 51 is disposed on one side of the outer ring 1 and the top steam seal 4 close to the axis, so that the water drain enters the water drain groove 5 along the seam and is discharged.
Further, the surface of the outer ring 1 and the blade top steam seal 4 close to the hydrophobic groove opening 51 is set to be a curved surface which is convenient for the hydrophobic water to flow into the hydrophobic groove opening 51, besides the hydrophobic water in the gap, the hydrophobic water thrown out by the centrifugal force of some blades 2 is generated around the joint of the outer ring 1 and the blade top steam seal 4, the hydrophobic water is adhered to the inner surfaces of the outer ring 1 and the blade top steam seal 4, the hydrophobic water is difficult to be introduced into the hydrophobic groove 5 without external force, the aim of effectively discharging the hydrophobic water is not achieved, so that the surface of the blade top steam seal 4 close to the hydrophobic groove opening 51 is set to be a curved surface which is convenient for the hydrophobic water to flow into the hydrophobic groove opening 51, the curved surface is set to be a curved surface which is arranged around the circumference of the hydrophobic groove opening 51, a funnel shape with low edge is formed, the attached hydrophobic water flows to the hydrophobic groove 5 along the curved surface, the effective drainage range of the hydrophobic water is enlarged, the hydrophobic water discharging efficiency is greatly improved, the blades 2 are protected, and the maintenance cost is reduced.
Further, in this embodiment, the drain end of the drain tank 5 is connected with a cylinder lower part, and the cylinder lower part is provided with a condenser, after the drain enters the drain tank 5, in order to avoid blocking or even reverse flow, drain the drain in the drain tank 5 into the cylinder lower part, prevent blocking, be connected with a condenser in the cylinder lower part for reuse the hot gas condensation that overflows the drain tank 5, and establish vacuum and maintain vacuum in the baffle drain tank 5, the benefit that so set up lies in: the steam turbine is prevented from being directly connected with the outside after the water drain groove 5 is arranged, and external impurities enter the steam turbine to damage the steam turbine, so that resources are further recycled, heat energy is saved, and efficiency is improved.
Further, the inner side surface of the hydrophobic groove 5 is set to be a smooth surface, and the smooth surface can ensure that the hydrophobic is not blocked by the concave-convex inner surface when entering the hydrophobic groove 5, and forms a water film when the hydrophobic is more, so that the hydrophobic groove 5 is blocked, and the hydrophobic effect of draining the hydrophobic is not achieved.
Further, the hydrophobic groove 5 is arranged to be a plurality of according to the humidity and the flow of the steam of the partition board, most of the hydrophobic water can be gathered under the partition board due to the influence of gravity, and three hydrophobic grooves 5 are arranged under the partition board so as to ensure that the hydrophobic water is discharged in time.
Further, as shown in fig. 2, the inner side surface of the drain tank 5 is an inclined surface capable of smoothly discharging the drain water from the drain end by means of the internal pressure of the partition plate, and since the rotation direction of the blade 2 is fixed, the drain tank 5 is an inclined channel with the same rotation direction as the blade 2, when the drain water is driven by the rotation of the blade 2, the drain water can enter the drain tank 5 by inertia and be smoothly discharged, and the drain efficiency of the drain tank 5 is improved.
Further, the blade top steam seal 4 is connected with the outer ring 1 through the bolts 6, the drainage grooves 5 are arranged in a staggered mode with the bolts 6, the drainage grooves 5 are arranged away from the bolts 6 in order to ensure the stability of the connecting bolts 6, and meanwhile potential safety hazards caused by loosening of the bolts 6 due to drainage are avoided.
Example 2
In this embodiment, as shown in fig. 2, the drain groove 5 is disposed in the top steam seal 4, and the drain groove opening 51 is disposed on one side of the top steam seal 4 close to the axis of the steam turbine, and is directly disposed as a circular linear through hole, and the opening 51 is disposed on one side of the outer ring 1 and the top steam seal 4 close to the axis, so that the drain water enters the drain groove 5 along the gap and is discharged, so that the structure of the partition board can be effectively utilized, excessive setting cost is not increased, the drain water generated in the partition board is effectively discharged, the blades 2 are protected, and maintenance cost is reduced.
Example 3
In this embodiment, this hydrophobic groove 5 sets up in outer loop 1, and hydrophobic groove opening 51 sets up in blade top gland 4 be close to steam turbine axle center one side, directly set up to circular straight line through-hole, opening 51 sets up in outer loop 1 and blade top gland 4 be close to one side of axle center, be convenient for drain along the gap get into the hydrophobic groove 5 after discharge, so set up, can effectively utilize the structure of baffle itself, do not increase too much setting cost, the hydrophobic that produces in the effectual discharge baffle, protection blade 2 reduces the maintenance cost.
Example 4
On the basis of the embodiments 1-3, as shown in fig. 4, the hydrophobic holes at three parts are combined and arranged at the lower part of the partition board, the distances are close, and the drainage ends of the three hydrophobic holes are converged into one piece to be connected with the lower part of the cylinder body, so that the advantage of the arrangement is that a plurality of hydrophobic tanks 5 are guaranteed at the position where more hydrophobic is generated, so that the hydrophobic efficiency is guaranteed, meanwhile, the drainage ends are converged into one piece, excessive holes are not drilled on the structure, and the strength of the structure is guaranteed.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A high-efficient hydrophobic structure of steam turbine low pressure final stage baffle, its characterized in that: the steam turbine comprises a partition plate, wherein the partition plate comprises an inner ring (3), blades (2) and an outer ring (1) which are sequentially arranged outwards from the axis of the steam turbine, a blade top steam seal (4) is arranged on the air outlet side of the outer ring (1), and a drain groove (5) for draining water and discharging the partition plate is formed in one end part, close to the axis, of the outer ring (1) or/and the blade top steam seal (4).
2. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the drain groove (5) is arranged on the joint surface of the outer ring (1) and the blade top steam seal (4), and the drain groove opening (51) is arranged on one side, close to the axis, of the outer ring (1) and the blade top steam seal (4).
3. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the drainage groove (5) is arranged in the blade top steam seal (4), and the drainage groove opening (51) is arranged on one side of the blade top steam seal (4) close to the axis of the steam turbine.
4. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the water drain groove (5) is arranged in the outer ring (1), and the water drain groove opening (51) is arranged on one side, close to the axis of the steam turbine, of the outer ring (1).
5. A steam turbine low pressure final stage diaphragm highly effective hydrophobic structure as claimed in any one of claims 2 to 4 wherein: the surface of the drain groove opening (51) is provided with a curved surface which facilitates the drain flow into the drain groove opening (51).
6. A steam turbine low pressure final stage diaphragm highly effective hydrophobic structure as claimed in any one of claims 1 to 4 wherein: the drainage end of the drainage groove (5) is connected with the lower part of the cylinder body, and the lower part of the cylinder body is provided with a condenser.
7. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the inner side surface of the drain groove (5) is a smooth surface.
8. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the number of the drainage grooves (5) is multiple according to the humidity and the flow of the steam of the partition board.
9. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the inner side surface of the drain groove (5) is provided with an inclined surface which can smoothly drain the drain water from the drain end by means of the internal pressure of the partition plate.
10. The high efficiency hydrophobic structure of a low pressure final diaphragm of a steam turbine of claim 1, wherein: the blade top steam seal (4) is connected with the outer ring (1) through bolts (6), and the water drain grooves (5) are arranged in a staggered mode with the bolts (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322508083.2U CN220687415U (en) | 2023-09-14 | 2023-09-14 | Efficient drainage structure of low-pressure final-stage partition plate of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322508083.2U CN220687415U (en) | 2023-09-14 | 2023-09-14 | Efficient drainage structure of low-pressure final-stage partition plate of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687415U true CN220687415U (en) | 2024-03-29 |
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ID=90369483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322508083.2U Active CN220687415U (en) | 2023-09-14 | 2023-09-14 | Efficient drainage structure of low-pressure final-stage partition plate of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687415U (en) |
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2023
- 2023-09-14 CN CN202322508083.2U patent/CN220687415U/en active Active
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