CN220267787U - Steam seal heat preservation and insulation structure - Google Patents
Steam seal heat preservation and insulation structure Download PDFInfo
- Publication number
- CN220267787U CN220267787U CN202321623207.5U CN202321623207U CN220267787U CN 220267787 U CN220267787 U CN 220267787U CN 202321623207 U CN202321623207 U CN 202321623207U CN 220267787 U CN220267787 U CN 220267787U
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- ring body
- teeth
- steam
- inner ring
- outer ring
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- 238000004321 preservation Methods 0.000 title claims description 21
- 238000009413 insulation Methods 0.000 title claims description 14
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 abstract description 23
- 230000009471 action Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to the technical field of steam seals of steam turbines, in particular to a heat-insulating structure of a steam seal, which comprises a steam seal part; comprises an outer ring body and an inner ring body; a limiting rod is coaxially fixed on the sliding block, and springs for propping against the sliding block are sleeved on the limiting rods; the insert blocks are provided with limiting holes, and the tail ends of the limiting rods are in plug-in fit with the limiting holes; the long gland seal teeth and the short gland seal teeth are arranged on the inner ring body, the inner ring body is inserted into the sliding groove through the insertion block, the outer ring body is provided with the limiting rod, the tail end of the limiting rod is inserted into the limiting hole under the elastic action of the spring, the inner ring body can be fixed on the outer ring body under the limitation of the limiting rod, and when the long gland seal teeth and the short gland seal teeth are worn and then need to be replaced, the limiting rod is pulled out of the limiting hole, so that the limitation on the inner ring body can be removed, and the inner ring body can be replaced; the design is convenient for replacing the worn gland sealing teeth, and the operation is convenient and the efficiency is high.
Description
Technical Field
The utility model relates to the technical field of steam seals of steam turbines, in particular to a heat-insulating structure of a steam seal.
Background
With the increasingly perfect design and manufacturing technology of the turbine through-flow part; at present, the leakage loss becomes a main factor for restricting the improvement of the efficiency of the steam turbine, and meanwhile, the steam sealing performance is good and bad, so that the economy of the unit can be influenced, and the reliability of the unit can be influenced; currently, the shaft seal device is divided into an end part steam seal, a baffle steam seal and a through-flow part steam seal, wherein the shaft seal device is positioned at a position where the main shaft passes through the cylinder and is used for preventing steam in the high-medium pressure cylinder from leaking into the low-pressure cylinder.
In the prior art, the commonly used steam seal is a labyrinth type steam seal, a plurality of smaller gaps are utilized between steam seal teeth and a shaft which are sequentially arranged to form a plurality of small steam chambers, so that the pressure of high-pressure steam in the steam chambers is gradually reduced to achieve the aim of reducing steam leakage, but in the use process of the labyrinth type steam seal, when a steam turbine passes a critical rotating speed in the starting and stopping process, the amplitude of a rotor is larger, if the radial installation gap of the steam seal is smaller, the labyrinth type steam seal teeth are easy to wear, the tightness of the worn steam seal is poor, and therefore the steam seal needs to be replaced, however, the existing steam seal is quite inconvenient in replacement, and the replacement efficiency is lower.
Disclosure of Invention
The utility model aims to provide a steam seal heat preservation and insulation structure so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a steam seal heat preservation and insulation structure comprises a steam seal part;
the steam seal part is used for steam sealing of the shaft end of the high-medium pressure cylinder of the steam turbine; comprises an outer ring body and an inner ring body;
the inner wall of the outer ring body is provided with two slots, the inner wall of the outer ring body is also provided with two symmetrically arranged sliding grooves, the slots are communicated with the corresponding sliding grooves, and the inner part of the outer ring body is provided with a heat preservation cavity; a heat preservation layer is arranged in the heat preservation cavity; two fixed blocks are symmetrically arranged on the outer wall of the outer ring body, the fixed blocks are of hollow structures, a sliding block is slidably arranged in an inner cavity of the fixed block, a limiting rod is coaxially fixed on the sliding block, one end of the limiting rod is inserted into the sliding groove, and springs for propping against the sliding block are sleeved on the limiting rod.
The outer wall of the inner ring body is symmetrically provided with inserting blocks, the inserting blocks penetrate through the slots and are inserted into the tail ends of the sliding grooves, the inserting blocks are provided with limiting holes, and the tail ends of the limiting rods are in plug-in fit with the limiting holes.
As a preferable technical scheme of the utility model, a plurality of long steam seal teeth which are distributed linearly at equal intervals are arranged on the inner wall of the inner ring body, short steam seal teeth are arranged between two adjacent long steam seal teeth, a side tooth is also arranged on one side wall of the long steam seal teeth, and a steam chamber is arranged on the side tooth.
As the preferable technical scheme of the utility model, the inner ring body, the long steam seal teeth, the short steam seal teeth and the side teeth are of an integrated structure, and the inner ring body, the long steam seal teeth, the short steam seal teeth and the side teeth are manufactured by alloy copper materials.
As the preferable technical scheme of the utility model, one end of the limiting rod far away from the plug is coaxially fixed with a poking head, and the poking head is coaxially connected with the limiting rod through a key.
As the preferable technical scheme of the utility model, the long steam seal teeth and the short steam seal teeth are distributed in a staggered way.
As the preferable technical scheme of the utility model, the outer ring body and the fixed block are tightly welded, and the outer ring body and the fixed block are manufactured products made of stainless steel materials.
As the preferable technical scheme of the utility model, the inner wall of the outer ring body is tightly welded with a sealing ring, and the sealing ring abuts against the inner ring body.
Compared with the prior art, the utility model has the beneficial effects that:
through the steam seal portion that sets up: the long gland seal teeth and the short gland seal teeth are arranged on the inner ring body, the inner ring body is inserted into the sliding groove through the insertion block, the outer ring body is provided with the limiting rod, the tail end of the limiting rod is inserted into the limiting hole under the elastic action of the spring, the inner ring body can be fixed on the outer ring body under the limitation of the limiting rod, and when the long gland seal teeth and the short gland seal teeth are worn and then need to be replaced, the limiting rod is pulled out of the limiting hole, so that the limitation on the inner ring body can be removed, and the inner ring body can be replaced; the design is convenient for replacing the worn gland sealing teeth, and the operation is convenient and the efficiency is high.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the outer ring of the present utility model;
FIG. 3 is a cross-sectional view of the outer ring of the present utility model;
FIG. 4 is an enlarged schematic view of the portion A of FIG. 3 according to the present utility model;
FIG. 5 is a schematic view of the inner ring body of the present utility model;
FIG. 6 is a cross-sectional view of the inner ring body of the present utility model.
In the figure:
1. a steam seal part; 10. an outer ring body; 101. a slot; 102. a chute; 103. a heat preservation cavity; 104. a seal ring; 11. a fixed block; 12. a slide block; 13. a limit rod; 131. a poking head; 14. a spring; 15. a heat preservation layer; 16. an inner ring body; 161. inserting blocks; 1611. a limiting hole; 17. long steam seal teeth; 18. short gland seal teeth; 19. side teeth; 191. a steam chamber.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment provides a technical scheme:
referring to fig. 1-6, a vapor seal heat preservation and insulation structure includes a vapor seal part 1. The steam seal part 1 is used for steam sealing of the shaft end of the high and medium pressure cylinder of the steam turbine; comprising an outer ring body 10 and an inner ring body 16; the inner wall of the outer ring body 10 is provided with two slots 101, the inner wall of the outer ring body 10 is also provided with two symmetrically arranged sliding grooves 102, the slots 101 are communicated with the corresponding sliding grooves 102, and the inner part of the outer ring body 10 is provided with a heat preservation cavity 103; a heat preservation layer 15 is arranged in the heat preservation cavity 103; two fixing blocks 11 are symmetrically arranged on the outer wall of the outer ring body 10, the fixing blocks 11 are of a hollow structure, a sliding block 12 is slidably arranged in an inner cavity of the fixing block 11, a limiting rod 13 is coaxially fixed on the sliding block 12, one end of the limiting rod 13 is inserted into a sliding groove 102, and springs 14 for propping against the sliding block 12 are sleeved on the limiting rod 13; the outer wall of the inner ring 16 is symmetrically provided with the inserting blocks 161, the inserting blocks 161 penetrate through the slots 101 and are inserted into the tail ends of the sliding grooves 102, the inserting blocks 161 are provided with limiting holes 1611, and the tail ends of the limiting rods 13 are in plug-in fit with the limiting holes 1611. A plurality of long steam seal teeth 17 which are distributed linearly at equal intervals are arranged on the inner wall of the inner ring body 16, short steam seal teeth 18 are arranged between two adjacent long steam seal teeth 17, a side tooth 19 is also arranged on one side wall of the long steam seal teeth 17, and a steam chamber 191 is arranged on the side tooth 19.
Through the arrangement mode, when the long gland seal teeth 17 and the short gland seal teeth 18 are worn and then need to be replaced, the limit rod 13 is pulled out of the limit hole 1611, so that the limit on the inner ring body 16 can be removed, and the inner ring body 16 can be replaced.
In this embodiment, the inner ring 16, the long gland seal teeth 17, the short gland seal teeth 18 and the side teeth 19 are integrally formed, and the inner ring 16, the long gland seal teeth 17, the short gland seal teeth 18 and the side teeth 19 are manufactured products made of alloy copper, so that the integrally formed structure has better structural strength, and the service lives of the inner ring 16, the long gland seal teeth 17, the short gland seal teeth 18 and the side teeth 19 are ensured, so that the inner ring 16, the long gland seal teeth 17, the short gland seal teeth 18 and the side teeth 19 have better wear resistance.
In this embodiment, a shift head 131 is coaxially fixed at one end of the stop lever 13 far away from the insert 161, and the shift head 131 is coaxially connected with the stop lever 13 by a key, the shift head 131 is arranged to facilitate pulling the stop lever 13 to move, so that the limitation on the inner ring 16 is conveniently removed to detach the inner ring 16.
In the embodiment, the long steam seal teeth 17 and the short steam seal teeth 18 are distributed in a staggered mode, and the design is beneficial to matching of the long steam seal teeth 17 and the short steam seal teeth 18 with bosses on the shaft, so that the sealing requirement of the shaft is met.
In this embodiment, the outer ring 10 is tightly welded with the fixing block 11, and the outer ring 10 and the fixing block 11 are made of stainless steel, so that the tight welding is firmly and stably connected, and the stainless steel has the advantage of high strength, thereby ensuring the service life of the outer ring 10.
In this embodiment, the inner wall of the outer ring body 10 is also tightly welded with a sealing ring 104, and the sealing ring 104 abuts against the inner ring body 16, so that the sealing tightness of the connection between the outer ring body 10 and the inner ring body 16 is increased by the sealing ring 104.
When the worn long gland seal teeth 17 and short gland seal teeth 18 need to be replaced, a user pulls the shifting head 131 to two sides firstly, the shifting head 131 drives the limiting rod 13 to move, at the moment, the limiting rod 13 drives the sliding block 12 to move, meanwhile, the spring 14 is compressed by the sliding block 12, the tail end of the limiting rod 13 is separated from the limiting hole 1611, at the moment, the limiting rod 13 limits the inner ring body 16, then the user rotates the inner ring body 16, the inserting block 161 slides along the sliding groove 102, when the inserting block 161 slides to the slot 101, the user pushes the inner ring body 16 to one side, the inserting block 161 is separated from the outer ring body 10, the inner ring body 16 is detached, then the user better new inner ring body 16 is used, the inserting block 161 is inserted into the slot 101, meanwhile, the user rotates the inner ring body 16, the inserting block 161 slides along the sliding groove 102 at the same time, when the inserting block 161 moves to the tail end of the limiting rod 13, the user loosens the shifting head 131, the tail end of the limiting rod 13 is inserted into the limiting hole 1611 under the elastic action of the spring 14, and the inner ring body 16 is replaced.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a vapor seal heat preservation heat insulation structure, includes vapor seal portion (1), its characterized in that:
the steam seal part (1) is used for steam sealing of the shaft end of the high-medium pressure cylinder of the steam turbine; comprises an outer ring body (10) and an inner ring body (16);
two slots (101) are formed in the inner wall of the outer ring body (10), two symmetrically arranged sliding grooves (102) are formed in the inner wall of the outer ring body (10), the slots (101) are communicated with the corresponding sliding grooves (102), and a heat preservation cavity (103) is formed in the outer ring body (10); an insulation layer (15) is arranged in the insulation cavity (103); two fixed blocks (11) are symmetrically arranged on the outer wall of the outer ring body (10), the fixed blocks (11) are of a hollow structure, a sliding block (12) is slidably arranged in an inner cavity of the fixed blocks (11), a limiting rod (13) is coaxially fixed on the sliding block (12), one end of the limiting rod (13) is inserted into a sliding groove (102), and springs (14) for propping against the sliding block (12) are sleeved on the limiting rod (13);
the outer wall of the inner ring body (16) is symmetrically provided with inserting blocks (161), the inserting blocks (161) penetrate through the slots (101) and are inserted into the tail ends of the sliding grooves (102), the inserting blocks (161) are provided with limiting holes (1611), and the tail ends of the limiting rods (13) are in plug-in fit with the limiting holes (1611).
2. The vapor seal heat preservation and insulation structure according to claim 1, wherein: a plurality of long steam seal teeth (17) which are distributed linearly at equal intervals are arranged on the inner wall of the inner ring body (16), short steam seal teeth (18) are arranged between two adjacent long steam seal teeth (17), side teeth (19) are further arranged on one side wall of each long steam seal tooth (17), and steam chambers (191) are formed in the side teeth (19).
3. The vapor seal heat preservation and insulation structure according to claim 1, wherein: the inner ring body (16), the long steam seal teeth (17), the short steam seal teeth (18) and the side teeth (19) are of an integrated structure, and the inner ring body (16), the long steam seal teeth (17), the short steam seal teeth (18) and the side teeth (19) are manufactured products made of alloy copper materials.
4. The vapor seal heat preservation and insulation structure according to claim 1, wherein: one end of the limiting rod (13) far away from the insertion block (161) is coaxially fixed with a shifting head (131), and the shifting head (131) is coaxially connected with the limiting rod (13) through a key.
5. The vapor seal heat preservation and insulation structure according to claim 2, wherein: the long steam seal teeth (17) and the short steam seal teeth (18) are distributed in a staggered mode.
6. The vapor seal heat preservation and insulation structure according to claim 1, wherein: the outer ring body (10) is tightly welded with the fixed block (11), and the outer ring body (10) and the fixed block (11) are manufactured products made of stainless steel materials.
7. The vapor seal heat preservation and insulation structure according to claim 1, wherein: a sealing ring (104) is tightly welded on the inner wall of the outer ring body (10), and the sealing ring (104) abuts against the inner ring body (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321623207.5U CN220267787U (en) | 2023-06-26 | 2023-06-26 | Steam seal heat preservation and insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321623207.5U CN220267787U (en) | 2023-06-26 | 2023-06-26 | Steam seal heat preservation and insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220267787U true CN220267787U (en) | 2023-12-29 |
Family
ID=89319125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321623207.5U Active CN220267787U (en) | 2023-06-26 | 2023-06-26 | Steam seal heat preservation and insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220267787U (en) |
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2023
- 2023-06-26 CN CN202321623207.5U patent/CN220267787U/en active Active
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