CN220815805U - Steam seal ring structure of steam turbine - Google Patents
Steam seal ring structure of steam turbine Download PDFInfo
- Publication number
- CN220815805U CN220815805U CN202322745340.4U CN202322745340U CN220815805U CN 220815805 U CN220815805 U CN 220815805U CN 202322745340 U CN202322745340 U CN 202322745340U CN 220815805 U CN220815805 U CN 220815805U
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- CN
- China
- Prior art keywords
- steam seal
- steam
- installation part
- seal
- gland
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- 210000004907 gland Anatomy 0.000 claims abstract description 34
- 238000009434 installation Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 abstract description 27
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model discloses a steam seal ring structure of a steam turbine, which comprises a steam seal ring main body, wherein the steam seal ring main body comprises a steam seal body installation part and a steam seal tooth installation part which are coaxially arranged, and the outer diameter of the steam seal body installation part is smaller than the outer diameter of the steam seal tooth installation part. The steam seal ring main body is provided with a plurality of steam seal grooves, each steam seal groove is divided into a steam seal groove axial section and a steam seal groove radial section, the steam seal groove axial section is axially arranged on the outer surface of the steam seal body installation part, and the steam seal groove radial section is radially arranged on the upper surface of the steam seal tooth installation part. The utility model uses the vapor pressure difference between the high pressure end and the low pressure end to compress the gland sealing ring, thereby avoiding the labyrinth gland sealing structure from losing function and further reducing the vapor leakage quantity of the shaft end of the steam turbine. The utility model aims to develop a novel steam seal structure form, which is more beneficial to shaft end steam seal, and can not generate larger change to the existing steam seal structure form, thereby being capable of being applied to various machine types on a large scale.
Description
Technical Field
The utility model belongs to the technical field of steam turbines, and relates to a steam seal ring, in particular to a steam seal ring structure of a steam turbine.
Background
The industrial steam turbine is a power machine which uses steam as working medium and converts steam energy into rotor rotary mechanical energy, and has the advantages of high single machine power, high efficiency, high rotating speed, convenient speed regulation, long service life, safe and reliable operation and the like, thus being widely applied to petrochemical industry.
The steam seal ring is arranged at the shaft end of the steam turbine, and mainly aims to seal steam, vortex deceleration is generated in the steam through a labyrinth structure, and further, the steam is prevented from escaping from the shaft end and is harmful to the environment.
In the structural design of the gland sealing ring in the prior art, a gap exists between the gland sealing teeth and the rotor of the steam turbine, and the gap can be increased during long-term operation, so that the labyrinth gland sealing structure is disabled, the shaft end steam leakage is increased, and the unit efficiency is deteriorated.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a steam seal ring structure of a steam turbine, which solves the technical problem that the steam seal ring structure in the prior art is easy to lose effect.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The steam seal ring structure of the steam turbine comprises a steam seal ring main body, wherein the steam seal ring main body comprises a steam seal body installation part and a steam seal tooth installation part which are coaxially arranged, and the outer diameter of the steam seal body installation part is smaller than that of the steam seal tooth installation part.
The steam seal ring is characterized in that a plurality of steam seal grooves are formed in the steam seal ring main body, each steam seal groove is divided into a steam seal groove axial section and a steam seal groove radial section, the steam seal groove axial section is axially formed in the outer surface of the steam seal body installation part, and the steam seal groove radial section is radially formed in the upper surface of the steam seal tooth installation part.
The axial upper end of the axial section of the steam seal groove is communicated with the upper end of the steam seal body installation part, the axial lower end of the axial section of the steam seal groove is communicated with the radial inner end of the radial section of the steam seal groove, and the radial outer end of the radial section of the steam seal groove is communicated with the radial outer end of the steam seal tooth installation part.
The utility model also has the following technical characteristics:
the gland sealing body installation part is installed on the gland sealing body of the steam turbine.
And a plurality of first gland sealing teeth are inlaid on the gland sealing tooth mounting part.
The first steam seal teeth and the second steam seal teeth are alternately staggered, and the second steam seal teeth are inlaid on a rotor of the steam turbine.
Compared with the prior art, the utility model has the following technical effects:
The steam seal ring is tightly pressed by utilizing the vapor pressure difference between the high-pressure end and the low-pressure end, so that the labyrinth type steam seal structure is prevented from losing effect, and the vapor leakage quantity of the shaft end of the steam turbine is further reduced.
The utility model aims to develop a novel steam seal structure form, which is more beneficial to shaft end steam seal and can not generate larger change to the existing steam seal structure form, thereby being capable of being applied to various machine types on a large scale.
Drawings
FIG. 1 is a schematic cross-sectional view of a steam seal ring structure of a steam turbine.
Fig. 2 is a schematic diagram of the working principle of the steam seal ring structure of the steam turbine.
The meaning of each reference numeral in the figures is: the novel steam seal ring comprises a 1-steam seal ring body, a 2-steam seal groove, a 3-steam seal body, 4-first steam seal teeth, 5-second steam seal teeth and 6-rotors.
101-Gland body installation part, 102-gland tooth installation part.
201-Steam seal groove axial section, 202-steam seal groove radial section.
The following examples illustrate the utility model in further detail.
Detailed Description
All parts and devices in the present utility model are known in the art unless otherwise specified.
As shown in fig. 2, the working principle of the gland sealing ring is as follows: the first gland sealing teeth 4) with different heights are embedded in the gland sealing ring main body 1, and the second gland sealing teeth 5 with different heights are alternately staggered with the second gland sealing teeth embedded on the turbine rotor 6 to form a labyrinth gland sealing structure, when high-pressure steam enters from the right side, the high-pressure steam sequentially passes through the gland sealing teeth like the labyrinth, and the speed is reduced, so that the steam leakage quantity at the shaft end is reduced.
The following specific embodiments of the present utility model are provided, and it should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present utility model fall within the protection scope of the present utility model.
Examples:
The embodiment provides a steam seal ring structure of a steam turbine, as shown in fig. 1, comprising a steam seal ring main body 1, wherein the steam seal ring main body comprises a steam seal body mounting part 101 and a steam seal tooth mounting part 102 which are coaxially arranged, and the outer diameter of the steam seal body mounting part 101 is smaller than the outer diameter of the steam seal tooth mounting part 102.
The gland ring main body 1 is provided with a plurality of gland grooves 2, each gland groove 2 is divided into a gland groove axial section 201 and a gland groove radial section 202, the gland groove axial section 201 is axially arranged on the outer surface of the gland body mounting part 101, and the gland groove radial section 202 is radially arranged on the upper surface of the gland tooth mounting part 102.
The axial upper end of the steam seal groove axial section 201 penetrates through the upper end of the steam seal body mounting part 101, the axial lower end of the steam seal groove axial section 201 is communicated with the radial inner end of the steam seal groove radial section 202, and the radial outer end of the steam seal groove radial section 202 penetrates through the radial outer end of the steam seal tooth mounting part 102.
As a preferable aspect of the present embodiment, as shown in fig. 2, the gland casing mounting portion 101 is mounted on the gland casing 3 of the steam turbine.
As a preferable aspect of the present embodiment, as shown in fig. 1, the seal tooth mounting portion 102 is embedded with a plurality of first seal teeth 4.
As a preferable scheme of the present embodiment, as shown in fig. 2, a plurality of first seal teeth 4 and a plurality of second seal teeth 5 are alternately staggered, and a plurality of second seal teeth 5 are inlaid on a rotor 6 of a steam turbine.
According to the steam sealing ring structure of the steam turbine, a certain width and a certain number of steam sealing grooves 2 are formed in the axial direction and the radial direction of the outer surface of the steam sealing ring main body 1, the radial left side of the steam sealing ring main body 1 is a low-pressure end, the radial right side of the steam sealing ring main body 1 is a high-pressure end, and steam enters the steam sealing groove 2 in the right-to-left moving process of the steam, so that the axial upper side pressure of the steam sealing ring main body 1 is higher than the axial lower side pressure, a pressure P can be generated on the steam sealing ring main body 1, the pressure can enable the steam sealing ring main body 1 to be compressed, the steam sealing gap between the steam sealing ring main body 1 and a rotor 6 is reduced, and the steam leakage quantity of the shaft end of the steam turbine is further reduced.
Claims (4)
1. The utility model provides a steam turbine gland ring structure, includes gland ring main part (1), and gland ring main part includes gland body installation department (101) and gland teeth installation department (102) of coaxial setting, and the external diameter of gland body installation department (101) is less than the external diameter of gland teeth installation department (102), its characterized in that:
The steam seal ring is characterized in that a plurality of steam seal grooves (2) are formed in the steam seal ring main body (1), each steam seal groove (2) is divided into a steam seal groove axial section (201) and a steam seal groove radial section (202), the steam seal groove axial section (201) is axially formed in the outer surface of the steam seal body mounting part (101), and the steam seal groove radial section (202) is radially formed in the upper surface of the steam seal tooth mounting part (102);
The axial upper end of the steam seal groove axial section (201) penetrates through the upper end of the steam seal body installation part (101), the axial lower end of the steam seal groove axial section (201) is communicated with the radial inner end of the steam seal groove radial section (202), and the radial outer end of the steam seal groove radial section (202) penetrates through the radial outer end of the steam seal tooth installation part (102).
2. The steam seal ring structure of the steam turbine according to claim 1, wherein the seal body mounting portion (101) is mounted on a seal body (3) of the steam turbine.
3. The steam seal ring structure of claim 1, wherein the seal tooth mounting portion (102) is embedded with a plurality of first seal teeth (4).
4. A steam seal ring structure of a steam turbine according to claim 3, wherein the first steam seal teeth (4) and the second steam seal teeth (5) are alternately staggered, and the second steam seal teeth (5) are embedded on a rotor (6) of the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322745340.4U CN220815805U (en) | 2023-10-12 | 2023-10-12 | Steam seal ring structure of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322745340.4U CN220815805U (en) | 2023-10-12 | 2023-10-12 | Steam seal ring structure of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220815805U true CN220815805U (en) | 2024-04-19 |
Family
ID=90671178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322745340.4U Active CN220815805U (en) | 2023-10-12 | 2023-10-12 | Steam seal ring structure of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220815805U (en) |
-
2023
- 2023-10-12 CN CN202322745340.4U patent/CN220815805U/en active Active
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