CN110307042A - A kind of gland seal structure between the motor-driven static component of rotating type impeller - Google Patents
A kind of gland seal structure between the motor-driven static component of rotating type impeller Download PDFInfo
- Publication number
- CN110307042A CN110307042A CN201910675631.6A CN201910675631A CN110307042A CN 110307042 A CN110307042 A CN 110307042A CN 201910675631 A CN201910675631 A CN 201910675631A CN 110307042 A CN110307042 A CN 110307042A
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- China
- Prior art keywords
- shroud
- sealing gear
- gland sealing
- gland
- rotating type
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Classifications
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- 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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
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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 gland seal structures between the motor-driven static component of rotating type impeller, including labyrinth ring, the gland sealing gear being arranged in seal ring, the shroud being tightly connected with gland sealing gear and the blade being arranged on shroud, the packing face connecting on the shroud with gland sealing gear is obliquely installed along the direction that shroud is relatively moved with gland sealing gear to gland sealing gear.The beneficial effects of the present invention are: the present invention is during unit starting, shroud is relatively moved with gland sealing gear, since packing face is obliquely installed, shroud is gradually increased at a distance from gland sealing gear, to reduce the risk that part collides, go on smoothly starting can, it prevents the impaired enhancing seal leakage of part and reduces economy, reduce flow-induced vibration, after set steady, the relative movement that shroud and gland sealing gear occur restores and guarantees design gaps required when stable operation of unit.
Description
Technical field
The present invention relates to gland seal structure technical field, specifically a kind of vapour between the motor-driven static component of rotating type impeller
Seal structure.
Background technique
Packing is the critical component that rotary machine inhibits fluid leakage.With the continuous improvement of working media parameter, vapour
It is more and more important to Unit Economic, stable operation to seal synergy damping property.And rotary machine, in start and stop, heating condition changes
Become thermal expansion or the cold events that will affect metal parts, to generate the relative motion of rotatable parts and stationary parts, forms phase
To motion value, that is, differential expansion.Therefore steam turbine is in shutdown process and during load and steam parameter change, each portion
Divide metal temperature and dynamic and static gaps that will all change.Especially rotating type impeller machinery works as liter in the boosting velocity procedure of starting
When to certain certain revolving speed, larger vibration will occur for rotatable parts, and at this time because the variation of dynamic and static gaps caused by thermal expansion makes
The possibility that dynamic and static component touches mill can occur in the process because of the vibration of rotatable parts for the gland seal structure for obtaining existing design, from
And influence unit and smoothly start, while the dynamic and static mill that touches increases radial clearance, seal leakage amount after steam turbine stable operation
Increase relative to former design value, and then leads to the decline of economy.Therefore, the superiority and inferiority of gland seal structure and performance, not only influences machine
Group reliability, also influences unit economy.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of vapour between the motor-driven static component of rotating type impeller
Seal structure, for reduce rotating type impeller it is mechanically activated during gland sealing gear and moving blade's shroud band top, gland sealing gear and partition touch
Risk is ground, leaf top when stable operation and partition air leakage are reduced.
Technical solution used by the present invention solves the above problems is: one kind is between the motor-driven static component of rotating type impeller
Gland seal structure, including labyrinth ring, the gland sealing gear being arranged in seal ring, with gland sealing gear be tightly connected shroud and be arranged in shroud
On blade, the packing face being connect on the shroud with gland sealing gear is along the direction of shroud and gland sealing gear relative movement to packing
Tooth is obliquely installed.
Further, in order to preferably realize the present invention, the inclined angle in packing face is greater than 0 ° and is less than or waits
In 10 °.
Beneficial effect acquired by this programme is:
(1) during unit starting, shroud is relatively moved with gland sealing gear, since packing face is obliquely installed, so that
Shroud can gradually increase at a distance from gland sealing gear, to reduce the risk that part collides, go on smoothly starting can,
It prevents the impaired enhancing seal leakage of part and reduces economy, reduce flow-induced vibration, after set steady, shroud and gland sealing gear are sent out
Raw relative movement restores and guarantees design gaps required when stable operation of unit；
(2) this programme structure is simple, and strong operability is conducive to large-scale application and popularization.
Detailed description of the invention
Fig. 1 is the scheme of installation of shroud and labyrinth ring；
Fig. 2 is the structural schematic diagram in packing face；
Fig. 3 is the scheme of installation of shroud and labyrinth ring with boss；
Fig. 4 is the scheme of installation of shroud and labyrinth ring with multiple boss.
Wherein: 10- labyrinth ring, 11- gland sealing gear, 20- shroud, 21- packing face, 30- blade.
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:
As shown in Figure 1, in the present embodiment, a kind of gland seal structure between the motor-driven static component of rotating type impeller, including
The shroud 20 and be arranged on shroud 20 that labyrinth ring 10, the gland sealing gear 11 being arranged in seal ring and gland sealing gear 11 are tightly connected
Blade 30, the side that the packing face 21 being connect on the shroud 20 with gland sealing gear 11 is relatively moved along shroud 20 and gland sealing gear 11
It is obliquely installed to gland sealing gear 11.Shifting of the shroud 20 relative to gland sealing gear 11 caused by arrow is shown due to thermal expansion in figure
Dynamic direction.Since shroud 20 is then opposite relative to the moving direction of gland sealing gear 11 caused by cold events.
During unit starting, due to there is opposite fortune between rotatable parts shroud 20 and stationary parts labyrinth ring 10
It is dynamic, so that there is the risk to collide between rotatable parts and stationary parts.This programme is by packing face 21 relative to enclosing
The direction inclined design relatively moved with 20 with gland sealing gear 11, so that the dynamic and static gaps between shroud 20 and labyrinth ring 10 are starting
During can incrementally increase, so that rotatable parts be avoided to collide with stationary parts, be conducive to protect the safety of structure,
Guarantee the service life of part, and can make to start smooth progress, weakens flow-induced vibration, after guaranteeing stable operation of unit, vapour
Design gaps d between envelope tooth 11 and shroud 20 is basically unchanged, and air leakage is made to be no more than design value, promotes unit reliability and warp
Ji property.
As shown in Fig. 2, a, b are respectively two reversed gland sealing gear axial direction safety clearances.
C is the radial clearance of gland sealing gear.
D is the design gaps of gland sealing gear radial direction.
β is tilt angle of the packing face 21 referring now to 20 axis of shroud.
β=arctan ((d-c)/a).
So that β is obtained angle greater than 0 ° and is less than or equal to 10 °.
As shown in figure 3, the packing face 21 is arranged on boss when shroud 20 has a boss.
As shown in figure 4, the packing face 21 is arranged between two adjacent lands when shroud 20 has multiple boss.
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 (2)
1. a kind of gland seal structure between the motor-driven static component of rotating type impeller, including labyrinth ring (10), setting are in seal ring
Gland sealing gear (11), shroud (20) for being tightly connected with gland sealing gear (11) and blade (30) on shroud (20) is set, spy
Sign is: the packing face connecting on the shroud (20) with gland sealing gear (11) is moved along shroud (20) and gland sealing gear (11) are opposite
Dynamic direction is obliquely installed to gland sealing gear (11).
2. a kind of gland seal structure between the motor-driven static component of rotating type impeller according to claim 1, feature exist
In: the inclined angle in packing face is greater than 0 ° and is less than or equal to 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910675631.6A CN110307042A (en) | 2019-07-25 | 2019-07-25 | A kind of gland seal structure between the motor-driven static component of rotating type impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910675631.6A CN110307042A (en) | 2019-07-25 | 2019-07-25 | A kind of gland seal structure between the motor-driven static component of rotating type impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110307042A true CN110307042A (en) | 2019-10-08 |
Family
ID=68080877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910675631.6A Pending CN110307042A (en) | 2019-07-25 | 2019-07-25 | A kind of gland seal structure between the motor-driven static component of rotating type impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110307042A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911243A (en) * | 2020-08-24 | 2020-11-10 | 中国长江动力集团有限公司 | Partition board assembled end steam seal structure |
| CN112196629A (en) * | 2020-11-12 | 2021-01-08 | 东方电气集团东方汽轮机有限公司 | Sealing structure and sealing method for moving blade of steam turbine |
| CN112610287A (en) * | 2020-12-29 | 2021-04-06 | 中国神华能源股份有限公司国华电力分公司 | High pressure steam turbine blade top gland structure |
| CN114483210A (en) * | 2021-12-27 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Steam seal structure between dynamic and static parts of radial flow turbine |
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| US6129513A (en) * | 1998-04-23 | 2000-10-10 | Rolls-Royce Plc | Fluid seal |
| CN2656641Y (en) * | 2002-06-28 | 2004-11-17 | 何立东 | High efficient gland sealing device for steam turbine |
| US20110156359A1 (en) * | 2009-12-31 | 2011-06-30 | General Electric Company | Turbine engine seals |
| US20130280049A1 (en) * | 2012-04-24 | 2013-10-24 | Benjamin T. Fisk | Blade having porous, abradable element |
| CN108204251A (en) * | 2016-12-20 | 2018-06-26 | 上海汽轮机厂有限公司 | Blade tip seal exports flow-guiding structure |
| CN109505665A (en) * | 2018-12-26 | 2019-03-22 | 北京航空航天大学 | A kind of densification device based on aero-engine seal pan axial force negative feedback control |
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2019
- 2019-07-25 CN CN201910675631.6A patent/CN110307042A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129513A (en) * | 1998-04-23 | 2000-10-10 | Rolls-Royce Plc | Fluid seal |
| CN2656641Y (en) * | 2002-06-28 | 2004-11-17 | 何立东 | High efficient gland sealing device for steam turbine |
| US20110156359A1 (en) * | 2009-12-31 | 2011-06-30 | General Electric Company | Turbine engine seals |
| US20130280049A1 (en) * | 2012-04-24 | 2013-10-24 | Benjamin T. Fisk | Blade having porous, abradable element |
| CN108204251A (en) * | 2016-12-20 | 2018-06-26 | 上海汽轮机厂有限公司 | Blade tip seal exports flow-guiding structure |
| CN109505665A (en) * | 2018-12-26 | 2019-03-22 | 北京航空航天大学 | A kind of densification device based on aero-engine seal pan axial force negative feedback control |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911243A (en) * | 2020-08-24 | 2020-11-10 | 中国长江动力集团有限公司 | Partition board assembled end steam seal structure |
| CN111911243B (en) * | 2020-08-24 | 2024-05-28 | 中国长江动力集团有限公司 | Baffle assembled tip vapor seal structure |
| CN112196629A (en) * | 2020-11-12 | 2021-01-08 | 东方电气集团东方汽轮机有限公司 | Sealing structure and sealing method for moving blade of steam turbine |
| CN112610287A (en) * | 2020-12-29 | 2021-04-06 | 中国神华能源股份有限公司国华电力分公司 | High pressure steam turbine blade top gland structure |
| CN114483210A (en) * | 2021-12-27 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Steam seal structure between dynamic and static parts of radial flow turbine |
| CN114483210B (en) * | 2021-12-27 | 2024-02-13 | 东方电气集团东方汽轮机有限公司 | Steam seal structure between dynamic and static parts of radial turbine |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191008 |