CN106224014B - A kind of inlet sleeve - Google Patents
A kind of inlet sleeve Download PDFInfo
- Publication number
- CN106224014B CN106224014B CN201610684098.6A CN201610684098A CN106224014B CN 106224014 B CN106224014 B CN 106224014B CN 201610684098 A CN201610684098 A CN 201610684098A CN 106224014 B CN106224014 B CN 106224014B
- Authority
- CN
- China
- Prior art keywords
- bushing
- inlet sleeve
- air intake
- sealing assembly
- steam pipe
- 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.)
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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
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of inlet sleeve, including steam pipe ontology, the periphery of the steam pipe ontology is set with the contact-type dynamic sealing assembly of corresponding steam turbine outer shell air intake, and cricoid bushing is set on the dynamic sealing assembly.The present invention on the dynamic sealing assembly of conventional stacked inlet sleeve by being set with cricoid bushing, to make it that can possess the feature of absorbable all directions heat expansion difference on high pressure double shell cylinder, moreover it is possible to make to be formed good and reliably leakproofness between its strict guarantee and outer shell air intake.
Description
Technical field
The present invention relates to the flow device of steam turbine, specifically a kind of inlet sleeve.
Background technology
In order to improve the mechanical efficiency of existing Steam Turbine, reduce resource consumption, increase economic benefit, to economy and peace
It is main technological means that the poor old unit of full property, which carries out flow technology transformation,.
In the flow technology transformation of Steam Turbine, it is contemplated that pipe joint, transformation economic cost and investment repayment income
The problems such as, the High-and-medium Pressure Outer Casing of old unit generally falls into reserve part set, and high pressure inner casing then belongs to transformation portion set.What is retained is outer
Cylinder is due to several years, the even longer time of being on active service, so that there are certain deformation at its air intake, including it is cylindricity, thick
Rugosity etc., this will make a big impact to the leakproofness for installing inlet sleeve herein, it is understood that, inlet sleeve is steam turbine
In high pressure double shell cylinder very universal property into vapour part, effect is leakproofness between should ensureing interior outer shell, again
Swollen difference in adapting between outer shell.Inlet sleeve sealing structure is promoted it can be seen that how to be efficiently modified, is related to that old unit is logical
The success or not of Flow Technique transformation, can have a direct impact the mechanical efficiency and unit heat consumption of Steam Turbine be transformed.
Invention content
The goal of the invention of the present invention is：Change for above-mentioned Steam Turbine flow passage component, especially old unit flow technology
The particularity made provides a kind of good airproof performance, reliability high inlet sleeve.
The technical solution adopted in the present invention is：A kind of inlet sleeve, including steam pipe ontology, the periphery of the steam pipe ontology
It is set with the contact-type dynamic sealing assembly of corresponding steam turbine outer shell air intake, cricoid lining is set on the dynamic sealing assembly
Set.
Preferably, the bushing is sleeved on the top of dynamic sealing assembly.Further, the portion below the bushing
The outer diameter of transfer seal assembly is consistent with the outer diameter of bushing.
Preferably, the upper end of the bushing has the inner platform of radial infolding.
Preferably, the periphery of the bushing offers the reserved dosage of annular space.
The dynamic sealing assembly is mainly made of the inner seal ring and outer seal ring of axially staggered superposition, inside and outside sealing ring
By the retaining ring axial limiting assembled on the baffle ring and baffle ring that are assembled on steam pipe ontology.
The bottom end of the steam pipe ontology has a flange portion of corresponding inner cylinder air intake, on the circumference of the flange portion
It is provided with multiple bolts hole.
The beneficial effects of the invention are as follows：
1. the present invention on the dynamic sealing assembly of conventional stacked inlet sleeve by being set with cricoid bushing, to make
It can possess the feature of absorbable all directions heat expansion difference on high pressure double shell cylinder, moreover it is possible to make its strict guarantee and outer shell into vapour
Good and reliably leakproofness is formed between mouthful；It, can be with this fully when applying the present invention to old unit flow technology transformation
Consider in Tong Liao area technology, retains the factors such as deformation and the roughness difference of old outer shell air intake and sealing structure is intubated to vapour
High-quality requirement, it is ensured that applied inlet sleeve is made to can aid in the success of old unit flow technology transformation；
2. the sealing between the present invention and outer shell air intake is realized by bushing and part dynamic sealing assembly, to make into
The sealing of " dual fail-safe " formula is realized in assembly of the vapour intubation on outer shell air intake, if having bushing or part dynamic sealing assembly with it is outer
Contact sealing well is formed between cylinder air intake, has just reached the technology mesh of the required good sealing property of inlet sleeve assembly
's；
3. the present invention bushing inner edge harden structure can not only make its is formed on dynamic sealing assembly reliably, steadily limit
Assembly, and it can also be made to form good fitted seal between dynamic sealing assembly；In addition, the reserved dosage knot of bushing periphery
Structure can greatly reduce its mating surface between outer shell air intake, and it is whole in outer shell air intake to advantageously reduce inlet sleeve
On assembly manipulation technical difficulty, especially, when its be applied to old unit flow technology be transformed when, moreover it is possible to be effectively matched in old
Structure size variation after the surface treatment of outer shell air intake；
In conclusion the present invention can be in strict guarantee between outer shell leakproofness, moreover it is possible to it is swollen between outer shell in adapting to
Difference, it can also be adapted to the flow technology of new unit other than the flow technology that can be specifically applied to old unit is transformed, close
Envelope property is good, and reliability is high, highly practical.
Description of the drawings
The present invention will be further described below with reference to the drawings.
Fig. 1 is a kind of structural schematic diagram of the present invention.
Fig. 2 is the enlarged structure schematic diagram of bushing in Fig. 1.
Fig. 3 is mounting structure schematic diagram of the present invention on steam turbine cylinder.
Code name meaning in figure：1-steam pipe ontology；2-inner seal rings；3-bushings；4-retaining rings；5-baffle rings；6-vapour
Pipe is perforated；7-inner platforms；8-reserved dosages；9-outer seal rings；10-flange portions.
Specific implementation mode
Shown in Fig. 1, Fig. 2 and Fig. 3, the present invention is the inlet sleeve of Steam Turbine high pressure double shell cylinder comprising
Steam pipe ontology 1, the bottom end of the steam pipe ontology 1 have a flange portion 10 being relatively large in diameter, flange portion 10 it is provided circumferentially about have it is multiple
Bolt hole is set with contact-type dynamic sealing assembly in the periphery of the steam pipe ontology 1 of 10 or more flange portion；In the application, dynamic sealing
Component corresponds to the air intake of steam turbine outer shell, realizes sealing assembly on the air intake of steam turbine outer shell with dynamic sealing assembly,
Flange portion 10 corresponds to the air intake of inner cylinder, makes it in inner cylinder into vapour with the connection of more high-strength bolts
Realize that sealing is fixed on mouth.
Seal assembly is mainly by multiple inner seal rings 2（Compare the sealing ring against steam pipe ontology 1）With multiple external seals
Ring 9（Compare the sealing ring that there is larger packaging clearance with steam pipe ontology 1）Composition, these inner seal rings 2 and outer seal ring 9 with
The mode being staggeredly superimposed is axially sleeved ikn on the periphery of steam pipe ontology 1, the structure size of the outer seal ring 9 of lower part, especially diameter
It is larger to structure size, baffle ring 5 that the inside and outside sealing ring of axially staggered superposition suit is assembled by 1 lower part of steam pipe ontology and
4 axial limiting of retaining ring assembled on baffle ring 5 is equipped with latch between retaining ring 4 and baffle ring 5.
Bushing 3 is slightly larger than the cyclic structure of dynamic sealing assembly top seal ring outer diameter, and the axial height of bushing 3 for internal diameter
Less than the axial height of dynamic sealing assembly.The upper end inner edge of bushing 3 has the inner platform 7 of radial infolding, is formed on the inner platform 7
The steam pipe perforation 6 of steam pipe ontology 1 is installed, the internal diameter of inner platform 7 is equal or slightly larger than the top outer diameter of steam pipe ontology 1 but is less than
The section of the outer diameter of first sealing ring in dynamic sealing assembly top, bushing 3 is in " inverted L " shape.Bushing 3 is axial by inner platform 7
It is sleeved on the top of steam pipe ontology 1, that is, is sleeved on the top of the dynamic sealing assembly of 1 periphery of steam pipe ontology；Moving for 3 lower section of bushing is close
Sealing assembly is exposed except bushing 3, the outer diameter of these exposed part dynamic sealing assemblies except bushing 3 and outer the one of bushing 3
It causes.The periphery of said sleeve 3 offers the reserved dosage 8 of annular space.
The above specific technical solution is only to illustrate the present invention, rather than its limitations；Although with reference to above-mentioned particular technique side
Invention is explained in detail for case, it will be understood by those of ordinary skill in the art that：The present invention still can be to above-mentioned
Specific technical solution is modified or equivalent replacement of some of the technical features, and these modifications or replacements, and
The essence of corresponding technical solution is not set to be detached from the spirit and scope of the present invention.
Claims (4)
1. a kind of Steam Turbine Tong Liao area inlet sleeve, the Tong Liao area of the Steam Turbine is the senior middle school of double shell structure
There is deformation in the outer shell air intake of laminate section, the senior middle school's laminate section being modified, the inlet sleeve includes steam pipe ontology（1）, institute
State steam pipe ontology（1）Bottom end there is the flange portion of corresponding inner casing air intake（10）, the flange portion（10）It is provided circumferentially about
There are multiple bolts hole, the steam pipe ontology（1）Pass through flange portion（10）Bolt hole in more high-strength bolts being connected it is close
Sealing is scheduled on the air intake of inner casing, the steam pipe ontology（1）Periphery be set with corresponding outer shell air intake contact-type move it is close
Sealing assembly, it is characterised in that：The top of the dynamic sealing assembly is set with cricoid bushing（3）, the bushing（3）The portion of lower section
The outer diameter and bushing of transfer seal assembly（3）Outer diameter it is consistent, the inlet sleeve passes through bushing（3）With part dynamic sealing assembly
Sealing assembly is realized with the deformation air intake of outer shell.
2. Steam Turbine Tong Liao area inlet sleeve according to claim 1, it is characterised in that：The bushing（3）It is upper
Holding has the inner platform of radial infolding（7）.
3. Steam Turbine Tong Liao area inlet sleeve according to claim 1 or claim 2, it is characterised in that：The bushing（3）'s
Periphery offers the reserved dosage of annular space（8）.
4. Steam Turbine Tong Liao area inlet sleeve according to claim 1, it is characterised in that：The dynamic sealing assembly master
It will be by the inner seal ring of axially staggered superposition（2）And outer seal ring（9）Composition, inside and outside sealing ring is by steam pipe ontology（1）It is upper to be filled
The baffle ring matched（5）And baffle ring（5）On the retaining ring assembled（4）Axial limiting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684098.6A CN106224014B (en) | 2016-08-18 | 2016-08-18 | A kind of inlet sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684098.6A CN106224014B (en) | 2016-08-18 | 2016-08-18 | A kind of inlet sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106224014A CN106224014A (en) | 2016-12-14 |
| CN106224014B true CN106224014B (en) | 2018-08-31 |
Family
ID=57553176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610684098.6A Active CN106224014B (en) | 2016-08-18 | 2016-08-18 | A kind of inlet sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106224014B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202432B (en) * | 2018-08-15 | 2021-01-05 | 上海电气电站设备有限公司 | Mounting process for steam turbine high and medium pressure cylinder pipe inserting sealing ring |
| CN110966050B (en) * | 2019-12-20 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam inlet insertion pipe sealing connection structure |
| CN112901285B (en) * | 2021-01-27 | 2023-03-03 | 中国电建集团四川工程有限公司 | Sealing device for sealing high-pressure turbine and dismantling method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4796896A (en) * | 1988-02-16 | 1989-01-10 | General Motors Corporation | Multi-stage elastomeric seal with retainer |
| ITMI20020910A1 (en) * | 2002-04-29 | 2003-10-29 | Nuovo Pignone Spa | SEALING DEVICE FOR COUPLING A PIPE WITH A HOLE |
| CN100343572C (en) * | 2006-08-11 | 2007-10-17 | 宋章根 | Pipe used high pressure resistant rotary compensator |
| CN202250251U (en) * | 2011-10-26 | 2012-05-30 | 哈尔滨汽轮机厂有限责任公司 | Laminated medium-pressure steam inlet insertion tube of steam turbine |
| CN202866911U (en) * | 2012-10-22 | 2013-04-10 | 上海电气电站设备有限公司 | Turbine high-pressure cylinder structure |
-
2016
- 2016-08-18 CN CN201610684098.6A patent/CN106224014B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106224014A (en) | 2016-12-14 |
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