CN110513153A - A kind of steam turbine intubation encapsulating method - Google Patents
A kind of steam turbine intubation encapsulating method Download PDFInfo
- Publication number
- CN110513153A CN110513153A CN201910781668.7A CN201910781668A CN110513153A CN 110513153 A CN110513153 A CN 110513153A CN 201910781668 A CN201910781668 A CN 201910781668A CN 110513153 A CN110513153 A CN 110513153A
- Authority
- CN
- China
- Prior art keywords
- sealing structure
- expansion coefficient
- linear expansion
- intubation
- seal ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of steam turbines to be intubated encapsulating method, under the working environment that operating temperature is higher than room temperature, keep the linear expansion coefficient of part different from the linear expansion coefficient of sealing structure, sealing structure is assembled by clearance fit at room temperature, part or sealing structure is made to expand and form interference fit at the working temperature.The beneficial effects of the present invention are: seal clearance of the invention can be with varying with temperature, it is convenient for assembly under normal temperature environment, installation cost is advantageously reduced, simplifies installation steps, improve installation effectiveness, sealing structure in installation process is avoided to be damaged and influence to use or increase cost, and facilitate it is subsequent replaced under normal temperature environment, dismantle the work such as sealing structure, in the work environment using thermal expansion guarantee sealing effect.
Description
Technical field
The present invention relates to steam turbine technology field, specifically a kind of steam turbine is intubated encapsulating method.
Background technique
In conventional thermal power unit steam turbine between outer shell into, steam extraction intubation during installation, due to sealing ring and interior outer shell
Between fit clearance is smaller or transition fit, generally using liquid nitrogen will sealing ring it is cooling after be packed into outer shell, installation procedure is multiple
Miscellaneous, installation cost is higher.It is stuck with interior outer shell after sealing ring recovery original size as liquid nitrogen cooling effect disappears after installation,
The activity for influencing sealing ring causes replacement, disassembly sealing ring difficulty to increase, and sealing ring easy to damage, causes unnecessary warp
Ji loss.Since sealing ring and intubation and interior outer shell match materials are inappropriate, in steam turbine steady-state operation, running clearance is greater than
Gap is installed, leakage vapour is caused, influences the economy of steam turbine.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of steam turbine intubation convenient for loading and unloading, sealed reliable is close
Encapsulation method, for reducing the installation difficulty and installation cost of sealing structure.
Technical solution used by the present invention solves the above problems is: a kind of steam turbine intubation encapsulating method, in work temperature
Degree is higher than under the working environment of room temperature, keeps the linear expansion coefficient of part different from the linear expansion coefficient of sealing structure, at room temperature
Sealing structure is assembled by clearance fit, part or sealing structure is made to expand and form interference fit at the working temperature.
Further, in order to preferably realize the present invention, the part includes intubation, and the sealing ring includes and inserts
The inner seal ring that pipe is coupled, the linear expansion coefficient of the inner seal ring are less than the linear expansion coefficient of intubation.
Further, in order to preferably realize the present invention, the part includes inner casing, the sealing ring include with it is interior
The exterior seal ring that cylinder is coupled, the linear expansion coefficient of exterior seal ring are greater than the linear expansion coefficient of inner casing.
Beneficial effect acquired by this programme is:
The seal clearance of this programme can be convenient for assembly under normal temperature environment with varying with temperature, and advantageously reduces installation
Cost simplifies installation steps, improves installation effectiveness, avoid in installation process sealing structure impaired and influence to use or increase at
This, and facilitate it is subsequent replaced under normal temperature environment, dismantle the work such as sealing structure, in the work environment using thermal expansion
Guarantee sealing effect.
Detailed description of the invention
Fig. 1 is the assembling schematic diagram of steam turbine intubation；
Fig. 2 is enlarged drawing at the C of Fig. 1.
Wherein: 1- intubation, 2- inner seal ring, 3- exterior seal ring, 4- inner casing.
Specific embodiment
Below with reference to examples and drawings, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment 1:
In the present embodiment, a kind of steam turbine is intubated encapsulating method, under the working environment that operating temperature is higher than room temperature, makes zero
The linear expansion coefficient of part and the linear expansion coefficient of sealing structure are different, assemble sealing structure, In by clearance fit at room temperature
Part or sealing structure is set to expand and form interference fit under operating temperature.
During installation, it can be carried out under normal temperature environment using clearance fit, not need to be installed using low temperature environment,
Installation cost is advantageously reduced, and can reduce the assembly difficulty of sealing structure and part under normal temperature environment, simplifies assembly
Process.And when avoiding installation sealing structure by force, there is the risk damaged sealing structure and make its loss of seal performance.
Later period since working environment is in the condition of high temperature, part or sealing ring expanded by heating in use, filling up gap and matching
Reserved gap is closed, part and the matching relationship of sealing structure is made to become being interference fitted, the effect of enhancing sealing performance is played with this
Fruit.
When sealing structure reaches service life, operation is carried out under normal temperature environment can remove sealing structure, in order to
Maintenance, replacement.
Embodiment 2:
As shown in Figure 1 and Figure 2, on the basis of the above embodiments, in the present embodiment, the part includes intubation 1, institute
The sealing ring stated includes the inner seal ring 2 being coupled with intubation 1, and the linear expansion coefficient of the inner seal ring 2 is less than intubation 1
Linear expansion coefficient.
Intubation 1 is gap-matched with inner seal ring 2 under normal temperature state, preset clearance A between intubation 1 and inner seal ring 2,
Intubation 1 can be inserted freely into inner seal ring 2, it is ensured that assembly is smooth.
So that the linear expansion coefficient of inner seal ring 2 is less than the linear expansion coefficient of intubation 1, in steam turbine steady-state operation, utilizes
It is intubated 1 principle different with the linear expansion coefficient of 2 material of inner seal ring, the thermal expansion amount for being intubated 1 is greater than the hot swollen of inner seal ring 2
Bulk will be eliminated gap A with this, it is ensured that intubation 1 and inner seal ring 2 between mating surface magnitude of interference, guarantee intubation 1 with it is interior close
Sealing performance between seal 2.
As shown in Fig. 2, the part includes inner casing 4, the sealing ring includes the external seal being coupled with inner casing 4
Circle 3, the linear expansion coefficient of exterior seal ring 3 are greater than the linear expansion coefficient of inner casing 4.
It is gap-matched between inner casing 4 and exterior seal ring 3 under normal temperature state, between being reserved between inner casing 4 and exterior seal ring 3
Gap B guarantees that exterior seal ring 3 can easily be fitted into inner casing 4, it is ensured that assembly is smooth.
So that the linear expansion coefficient of exterior seal ring 3 is greater than the linear expansion coefficient of inner casing 4, in steam turbine steady-state operation, utilizes
The principle different from the linear expansion coefficient of 3 material of outer seal ring of inner casing 4, the heat that the thermal expansion amount of exterior seal ring 3 is greater than inner casing 4 are swollen
Bulk will be eliminated gap B with this, it is ensured that the magnitude of interference of mating surface between exterior seal ring 3 and inner casing 4 guarantees sealing performance.
In the present embodiment, other contents not described are same as the previously described embodiments, therefore do not repeat.
It is above-described, it is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form,
According to the technical essence of the invention, within the spirit and principles in the present invention, to the above embodiments any simply to repair
Change, equivalent replacement and improvement etc., fall within the scope of protection of the technical scheme of the present invention within.
Claims (3)
1. a kind of steam turbine is intubated encapsulating method, it is characterised in that: under the working environment that operating temperature is higher than room temperature, make part
Linear expansion coefficient it is different from the linear expansion coefficient of sealing structure, at room temperature by clearance fit assemble sealing structure, in work
Part or sealing structure is set to expand and form interference fit at a temperature of work.
2. a kind of steam turbine according to claim 1 is intubated encapsulating method, it is characterised in that: the part includes intubation
(1), the sealing ring includes the inner seal ring (2) being coupled with intubation (1), the line expansion of the inner seal ring (2)
Coefficient is less than the linear expansion coefficient of intubation (1).
3. a kind of steam turbine according to claim 1 is intubated encapsulating method, it is characterised in that: the part includes inner casing
(4), the sealing ring includes the exterior seal ring (3) being coupled with inner casing (4), and the linear expansion coefficient of exterior seal ring (3) is big
Linear expansion coefficient in inner casing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910781668.7A CN110513153A (en) | 2019-08-23 | 2019-08-23 | A kind of steam turbine intubation encapsulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910781668.7A CN110513153A (en) | 2019-08-23 | 2019-08-23 | A kind of steam turbine intubation encapsulating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513153A true CN110513153A (en) | 2019-11-29 |
Family
ID=68626186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910781668.7A Pending CN110513153A (en) | 2019-08-23 | 2019-08-23 | A kind of steam turbine intubation encapsulating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513153A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112359A (en) * | 2021-11-19 | 2022-03-01 | 中车长春轨道客车股份有限公司 | Ultra-deep cold assembly interference connection reliability experiment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769226A (en) * | 2012-11-06 | 2015-07-08 | 三菱日立电力系统株式会社 | Seal structure for vapor turbine |
| CN208184788U (en) * | 2018-03-26 | 2018-12-04 | 浙江辽汽汽轮机有限公司 | A kind of stacked steam turbine inlet sleeve sealing device |
| US20200284156A1 (en) * | 2019-03-06 | 2020-09-10 | Parker-Hannifin Corporation | Next gen riffle seal |
-
2019
- 2019-08-23 CN CN201910781668.7A patent/CN110513153A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769226A (en) * | 2012-11-06 | 2015-07-08 | 三菱日立电力系统株式会社 | Seal structure for vapor turbine |
| CN208184788U (en) * | 2018-03-26 | 2018-12-04 | 浙江辽汽汽轮机有限公司 | A kind of stacked steam turbine inlet sleeve sealing device |
| US20200284156A1 (en) * | 2019-03-06 | 2020-09-10 | Parker-Hannifin Corporation | Next gen riffle seal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112359A (en) * | 2021-11-19 | 2022-03-01 | 中车长春轨道客车股份有限公司 | Ultra-deep cold assembly interference connection reliability experiment method |
| WO2023087385A1 (en) * | 2021-11-19 | 2023-05-25 | 中车长春轨道客车股份有限公司 | Method for testing reliability of interference connection of ultra-deep cold assembly |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191129 |