CN219774796U - Spindle sealing structure of axial flow water turbine - Google Patents
Spindle sealing structure of axial flow water turbine Download PDFInfo
- Publication number
- CN219774796U CN219774796U CN202321152223.0U CN202321152223U CN219774796U CN 219774796 U CN219774796 U CN 219774796U CN 202321152223 U CN202321152223 U CN 202321152223U CN 219774796 U CN219774796 U CN 219774796U
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- sealing
- block
- axial flow
- main shaft
- stainless steel
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- 238000007789 sealing Methods 0.000 title claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 25
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 25
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 scale Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Hydraulic Turbines (AREA)
Abstract
The utility model discloses a spindle sealing structure of an axial flow water turbine, which relates to the technical field of water turbines and comprises a spindle and a sealing seat, wherein a rotating ring is fixed on the spindle, a sealing ring is fixed on the sealing seat, a through sealing groove is formed in the sealing ring, a boss is arranged at the bottom of the sealing groove, a sealing block is arranged in the sealing groove, a split annular stainless steel base plate is arranged on the boss below the sealing block, and an elastic cushion block is arranged between the sealing block and the split annular stainless steel base plate. The sealing block of the axial flow water turbine main shaft sealing structure does not need hydraulic jacking, and a gap is basically not reserved between the sealing block and the rotating ring, so that a large amount of water leakage is avoided even if the sealing block cannot be jacked at all.
Description
Technical Field
The utility model relates to the technical field of water turbines, in particular to a spindle sealing structure of an axial flow water turbine.
Background
The existing design of axial flow turbine spindle seal is that the gap between a seal seat and a swivel is 10mm, the groove depth of a seal block installed in a seal groove is 70mm, the design height of the seal block is 65mm, the gap between a seal block and the swivel is 15mm when the seal block is normally installed, and when the seal block is in operation, spindle seal water of 0.02MPa-0.2MPa is needed to jack up the seal block for 15mm to contact the swivel, so that the seal effect is achieved. When the manufacturing unit designs the sealing groove, two materials of carbon steel and stainless steel are adopted, sealing water cannot be completely cleaned, substances such as scale, sediment and shells are contained in the sealing groove, the scale, the sediment and the like can be attached in the sealing groove or the sealing groove made of the carbon steel can cause the situation that a main shaft sealing block cannot be normally jacked up due to corrosion and the like in the long-term use process, so that the top cover water rises faster, and the potential safety hazard of the flooded oil guiding basin is caused.
Disclosure of Invention
The utility model mainly aims to provide a spindle sealing structure of an axial flow water turbine, which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is that the spindle sealing structure of the axial flow water turbine comprises a spindle and a sealing seat, wherein a rotating ring is fixed on the spindle, a sealing ring is fixed on the sealing seat, a through sealing groove is formed in the sealing ring, a boss is arranged at the bottom of the sealing groove, a sealing block is arranged in the sealing groove, a split annular stainless steel base plate is arranged on the boss below the sealing block, and an elastic cushion block is arranged between the sealing block and the split annular stainless steel base plate.
Further, the sealing block is connected in the sealing groove through a locating pin, and the locating pin penetrates through the split annular stainless steel backing plate and the elastic cushion block.
Further, the sealing block is provided with a water through hole.
Further, the number of the water through holes is 2-4, the diameter is 6-8 mm, and the water through holes are uniformly distributed on the circumferential surface of the sealing block.
Further, the bottom of the sealing block is provided with an inverted U-shaped groove.
Further, the elastic cushion block is made of rubber.
Further, the sealing seat, the swivel and the sealing ring are made of stainless steel.
Further, the method comprises the steps of. The sealing block is made of wear-resistant rubber.
Compared with the prior art, the utility model has the following beneficial effects:
1. the sealing block of the axial flow water turbine main shaft sealing structure does not need hydraulic jacking, and a gap is basically not reserved between the sealing block and the rotating ring, so that a large amount of water leakage is avoided even if the sealing block cannot be jacked at all.
2. The parts are made of stainless steel, so that rust of the parts is avoided, maintenance workload is reduced, equipment reliability is improved, the sealing blocks are made of wear-resistant rubber, and the sealing blocks are prevented from being worn by the swivel to cause overlarge sealing surface gap to leak water.
3. The elastic cushion block is matched between the sealing block and the stainless steel backing plate, so that the sealing block and the swivel are in certain elastic contact, and the contact pressure between the sealing block and the swivel is not too large, so that the abrasion of the sealing block is not aggravated.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is an enlarged partial schematic view of FIG. 1 in accordance with the present utility model;
FIG. 3 is a schematic plan view of a seal block of the present utility model;
FIG. 4 is a schematic plan view of a split ring-shaped stainless steel backing plate of the present utility model.
Parts and numbers in the figure:
1-a main shaft; 2-a sealing seat; 3-swivel; 4-a sealing ring; 5-a sealing block; 6-stainless steel backing plates; 7-elastic cushion blocks; 8-locating pins; 501-water through holes.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-4, the technical scheme adopted by the utility model is that the main shaft sealing structure of the axial flow water turbine comprises a main shaft 1 and a sealing seat 2, wherein a swivel 3 is fixed on the main shaft 1, a sealing ring 4 is fixed on the sealing seat 2, a through sealing groove is formed in the sealing ring 4, a boss is arranged at the bottom of the sealing groove, a sealing block 5 is arranged in the sealing groove, a split annular stainless steel base plate 6 is arranged on the boss below the sealing block 5, and an elastic cushion block 7 is arranged between the sealing block 5 and the split annular stainless steel base plate 6. The gap between the split ring-shaped stainless steel backing plates 6 can allow water to pass through, and the gap between the sealing block 5 and the rotating ring 3 is basically not reserved, so that a large amount of water leakage is avoided under the condition that the sealing block cannot be jacked up at all.
Further, the sealing block 5 is connected in the sealing groove through a locating pin 8, and the locating pin 8 penetrates through the split annular stainless steel backing plate 6 and the elastic cushion block 7. The locating pin 8 prevents the sealing block 5 from rotating in the circumferential direction, abrasion between the rotation of the sealing block 5 and the swivel 3 is avoided, the split annular stainless steel base plate 6 is not folded, and water in the sealing groove can reach the groove of the sealing block 5 through the gap.
Further, the sealing block 5 is provided with a water through hole 501. So that water can reach the sealing surface of the sealing block 5 to play a role in lubrication.
Further, the number of the water through holes 501 is 2-4, the diameter is 6-8 mm, and the water through holes are uniformly distributed on the circumferential surface of the sealing block 5.
Further, the bottom of the sealing block 5 is provided with an inverted U-shaped groove. Ensuring a certain sealing water pressure.
Further, the elastic cushion 7 is made of rubber.
Further, the sealing seat 2, the swivel 3 and the sealing ring 4 are made of stainless steel.
Further, the method comprises the steps of. The sealing block 5 is made of wear-resistant rubber.
When the main shaft 1 is installed and sealed, after the sealing seat 2 is installed, the sealing ring 4 and the sealing seat 2 are of an integral structure, only the stainless steel cushion plate 6 is needed to be placed, the sealing block 5 and the swivel 3 are pre-installed, the actual gap between the sealing block 5 and the swivel 3 is measured, the elastic cushion block 7 with corresponding thickness is added on the stainless steel cushion plate 6 according to the measured actual gap, the actually added elastic cushion block 7 is needed to be manually cut on site according to the actual gap between the sealing block 5 and the swivel 3 and according to the shape of the stainless steel cushion block 6, the shape of the elastic cushion block 7 is needed to be consistent with the shape of the stainless steel cushion block 6, the interval between two flaps is also needed to be reserved, the positioning pin hole is matched, and the elastic cushion block 7 is consistent with or slightly smaller than the measured gap. When the sealing block 5 is installed, 2-4 water holes 501 with the diameter of 6 mm-8 mm are drilled in addition to the positioning pin holes so as to ensure that lubricating water is always reserved between the swivel 3 and the sealing block 5; when the swivel 3 is integrally installed, the swivel 3 in half can be directly pushed into the clamping groove of the main shaft 1 to be installed in place by being directly pressed against the sealing block 5.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an axial-flow water turbine main shaft seal structure, includes main shaft (1) and sealing seat (2), its characterized in that: the novel sealing device is characterized in that a swivel (3) is fixed on the main shaft (1), a sealing ring (4) is fixed on the sealing seat (2), a through sealing groove is formed in the sealing ring (4), a boss is arranged at the bottom of the sealing groove, a sealing block (5) is arranged in the sealing groove, a split annular stainless steel base plate (6) is arranged on the boss below the sealing block (5), and an elastic cushion block (7) is arranged between the sealing block (5) and the split annular stainless steel base plate (6).
2. The axial flow turbine main shaft sealing structure according to claim 1, wherein: the sealing block (5) is connected in the sealing groove through a locating pin (8), and the locating pin (8) penetrates through the split annular stainless steel base plate (6) and the elastic cushion block (7).
3. The axial flow turbine main shaft sealing structure according to claim 1, wherein: and the sealing block (5) is provided with a water through hole (501).
4. A spindle seal for an axial flow water turbine according to claim 3, wherein: the number of the water through holes (501) is 2-4, the diameter is 6-8 mm, and the water through holes are uniformly distributed on the circumferential surface of the sealing block (5).
5. The axial flow turbine main shaft sealing structure according to any one of claims 1 to 4, wherein: the bottom of the sealing block (5) is provided with an inverted U-shaped groove.
6. The axial flow turbine main shaft sealing structure according to any one of claims 1 to 4, wherein: the elastic cushion block (7) is made of rubber.
7. The axial flow turbine main shaft sealing structure according to any one of claims 1 to 4, wherein: the sealing seat (2), the swivel (3) and the sealing ring (4) are made of stainless steel.
8. The axial flow turbine main shaft sealing structure according to any one of claims 1 to 4, wherein: the sealing block (5) is made of wear-resistant rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321152223.0U CN219774796U (en) | 2023-05-15 | 2023-05-15 | Spindle sealing structure of axial flow water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321152223.0U CN219774796U (en) | 2023-05-15 | 2023-05-15 | Spindle sealing structure of axial flow water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774796U true CN219774796U (en) | 2023-09-29 |
Family
ID=88135334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321152223.0U Active CN219774796U (en) | 2023-05-15 | 2023-05-15 | Spindle sealing structure of axial flow water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774796U (en) |
-
2023
- 2023-05-15 CN CN202321152223.0U patent/CN219774796U/en active Active
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