CN219548929U - TRT stationary blade sealing structure - Google Patents
TRT stationary blade sealing structure Download PDFInfo
- Publication number
- CN219548929U CN219548929U CN202320198344.2U CN202320198344U CN219548929U CN 219548929 U CN219548929 U CN 219548929U CN 202320198344 U CN202320198344 U CN 202320198344U CN 219548929 U CN219548929 U CN 219548929U
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- CN
- China
- Prior art keywords
- vane
- sealing ring
- trt
- stationary blade
- sealing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a TRT stationary blade sealing structure, which comprises a stationary blade handle sleeved with a graphite bearing, wherein a sealing ring groove is further formed in the sleeved part of the stationary blade handle and the graphite bearing, and a sealing ring is sleeved in the sealing ring groove; a vane stem air inlet channel is also arranged in the sealing ring groove and at the lower end of the vane stem of the stator vane. Compared with the traditional stator blade sealing mode, the method for introducing nitrogen into the stator blade by adopting the blade handle greatly prolongs the service life of the stator blade sealing ring, reduces the shutdown maintenance frequency and improves the production benefit.
Description
Technical Field
The utility model belongs to the technical field of equipment in the field of blast furnace gas residual pressure turbine power generation, and relates to a TRT stationary blade sealing structure.
Background
In the iron-making process flow, the original blast furnace gas is washed and dedusted, and then the blast furnace gas is subjected to a pressure reducing valve group to weaken the pressure of the high-pressure gas to a proper level and is sent to a user, and the process can lead the residual pressure of the blast furnace gas to be white and consumed. The residual pressure of the gas is converted into electric energy by a TRT (blast furnace gas residual pressure turbine generator) unit and then sent to a user.
Another important function of the TRT unit is to adjust the top pressure of the blast furnace, in order to obtain stable top pressure of the blast furnace, the angle of the stator blade of the TRT unit needs to be continuously adjusted, and the rotation frequency is high, so that the abrasion of the stator blade sealing ring is faster, when the stator blade sealing ring is abraded to a certain extent, the sealing is invalid, gaps are formed between the stator blade handles and the graphite bearings, toxic gas leaks through the gaps, when the abrasion of the stator blade sealing ring is serious, the sealing ring needs to be replaced by stopping, and based on the high power generation capacity of the TRT unit, the TRT unit is stopped, so that huge economic loss is often caused.
The sealing structure adopted on the existing TRT unit is shown in fig. 1, and one or two rings of sealing rings are arranged on the stationary blade and stem, so that the stationary blade rotates continuously in operation, and the blast furnace gas also contains more solid particles, the sealing rings are gradually worn after a period of operation, gaps are generated between the stationary blade and stem and the graphite bearing, and the sealing performance is reduced or fails as shown in fig. 2. The sealing ring is changed from O shape to D shape.
Disclosure of Invention
The utility model aims to provide a TRT stationary blade sealing structure which can remarkably prolong the service life of a stationary blade sealing ring and has the characteristic of reducing the frequency of TRT shutdown maintenance.
The technical scheme adopted by the utility model is that the TRT stationary blade sealing structure comprises a stationary blade handle sleeved with a graphite bearing, wherein a sealing ring groove is further formed in the sleeved part of the stationary blade handle and the graphite bearing, and the sealing ring is sleeved in the sealing ring groove; a vane stem air inlet channel is also arranged in the sealing ring groove and at the bottom end of the vane stem of the stator vane.
Further, the diameter of the inlet channel of the blade handle is as follows: 8mm.
Further, at least one inlet passage of the blade handle is arranged.
Further, the inlet channel of the blade handle is filled with nitrogen.
Further, the pressure of the nitrogen introduced into the inlet passage of the blade handle is as follows: 0.4MPa.
Further, the nitrogen gas flows from the bottom end of the blade handle into the sealing ring groove to contact with the sealing ring.
The beneficial effects of the utility model are as follows:
compared with the traditional stator blade sealing mode, the method for introducing nitrogen into the stator blade by adopting the blade handle greatly prolongs the service life of the stator blade sealing ring, reduces the shutdown maintenance frequency and improves the production benefit.
Drawings
FIG. 1 is a seal block diagram of a conventional vane;
FIG. 2 is a schematic illustration of the seal ring after wear failure;
FIG. 3 is a view showing a seal structure of a TRT vane in the present utility model
Fig. 4 is a schematic diagram of the gas flow in fig. 3.
In the figure, 1, a blade stem air inlet channel, 2, a sealing ring groove, 3, a sealing ring and 4, and a graphite bearing.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
As shown in fig. 3-4: the TRT stationary blade sealing structure is characterized by comprising a stationary blade handle sleeved with a graphite bearing 4, wherein a sealing ring groove 2 is further formed in the sleeved part of the stationary blade handle and the graphite bearing 4, and a sealing ring 3 is sleeved in the sealing ring groove 2; the sealing ring groove 2 and the lower end of the static blade handle are also provided with a blade handle air inlet channel 1.
The diameter of the vane stem air inlet channel 1 is as follows: 8mm.
The number of the blade stem air inlet channels 1 is at least one.
The inlet gas of the blade stem inlet channel 1 is nitrogen.
The pressure of the nitrogen introduced into the blade stem air inlet channel 1 is as follows: 0.4MPa.
The nitrogen gas flows from the bottom end of the blade handle into the sealing ring groove 2 to be in contact with the sealing ring 3.
When the TRT unit works, the TRT unit is connected to the vane stem air inlet channel 1 through a pipeline and is filled with nitrogen, the nitrogen enters the sealing ring groove 2 through the vane stem air inlet channel 1, when the sealing ring 3 of the stationary vane is worn, the sealing ring 3 can expand outwards to fill the gap between the vane stem of the stationary vane and the graphite bearing 4 due to the action of the nitrogen with pressure, so that the continuous sealing effect is achieved, the sealing service life is greatly prolonged, the shutdown maintenance frequency is reduced, and the production benefit is improved.
Claims (6)
1. The TRT stationary blade sealing structure is characterized by comprising a stationary blade handle sleeved with a graphite bearing (4), wherein a sealing ring groove (2) is further formed in the sleeved part of the stationary blade handle and the graphite bearing (4), and a sealing ring (3) is sleeved in the sealing ring groove (2); a vane stem air inlet channel (1) is also arranged in the sealing ring groove (2) and at the lower end of the vane stem of the stator vane.
2. The TRT vane sealing structure according to claim 1, wherein the vane shank inlet passage (1) has a diameter of: 8mm.
3. The TRT vane sealing structure according to claim 1, wherein the vane stem inlet passage (1) is at least one.
4. The TRT vane sealing structure according to claim 1, wherein the inlet gas to the vane stem inlet passage (1) is nitrogen.
5. The TRT vane sealing structure according to claim 4, wherein the pressure of the nitrogen introduced into the vane stem inlet passage (1) is: 0.4MPa.
6. The TRT vane sealing structure according to claim 4, wherein the nitrogen gas flows from the bottom end of the vane stem into the seal ring groove (2) to contact with the seal ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198344.2U CN219548929U (en) | 2023-02-13 | 2023-02-13 | TRT stationary blade sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198344.2U CN219548929U (en) | 2023-02-13 | 2023-02-13 | TRT stationary blade sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219548929U true CN219548929U (en) | 2023-08-18 |
Family
ID=87703904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320198344.2U Active CN219548929U (en) | 2023-02-13 | 2023-02-13 | TRT stationary blade sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219548929U (en) |
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2023
- 2023-02-13 CN CN202320198344.2U patent/CN219548929U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |