CN106194279A - The axially mounted brush steam seal of steam turbine - Google Patents
The axially mounted brush steam seal of steam turbine Download PDFInfo
- Publication number
- CN106194279A CN106194279A CN201610755990.9A CN201610755990A CN106194279A CN 106194279 A CN106194279 A CN 106194279A CN 201610755990 A CN201610755990 A CN 201610755990A CN 106194279 A CN106194279 A CN 106194279A
- Authority
- CN
- China
- Prior art keywords
- brush
- axially mounted
- labyrinth ring
- ring body
- steam seal
- 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
Links
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
Abstract
The present invention relates to Steam Turbine Sealing Technologies field, especially a kind of axially mounted brush steam seal of steam turbine, axially mounted brush steam seal is made up of the labyrinth ring that multistage is end to end, labyrinth ring includes: labyrinth ring body and brush ring, brush ring includes front plate, rear plate and the metal brush filament being folded between described front plate and described rear plate, brush ring is arranged on the front side of labyrinth ring body, and the rear side of labyrinth ring body has plush copper installation portion, and the direction of metal brush filament is the most identical with labyrinth ring body.Steam turbine includes axle, impeller and dividing plate, and axially mounted brush being used for of steam turbine seals the gap between the impeller of steam turbine and dividing plate；The front side of impeller has the packing mounting groove making plush copper installation portion slip into；Metal brush filament is towards dividing plate.Between impeller and the dividing plate of the steam turbine of the present invention, axially mounted brush steam seal is installed, has effectively sealed against the gap between impeller and dividing plate, improve the cylinder efficiency of steam turbine.
Description
Technical field
The present invention relates to Steam Turbine Sealing Technologies field, especially a kind of axially mounted brush steam seal of steam turbine.
Background technology
Packing is to be installed between the dynamic and static part of steam turbine, reduces or prevents steam from leaking and inlet side air leaks into
Device.In order to reduce the gas leakage in the gap everywhere of steam turbine, ensure that steam turbine normal safe runs, therefore steam turbine again
Interior spy is provided with various packing, and whole labyrinth ring is formed by multistage packing segmental arc body is end to end.Traditional common packing is main
There are comb labyrinth gland and honeycomb steam seal etc. firmly to seal, in order to adapt to deformation and the eccentric motion of turbine rotor, prevent from connecing
Tactile rotor causes rotor to wear and tear, and must leave sufficiently large gap, thus this type of sealing effectiveness is not to the utmost between labyrinth ring and rotor
Comply with one's wishes.
The most brush flexible packing increasingly receives publicity, and brush steam seal is by front plate, rear plate and to be clipped in both
Between the brush ring of metal brush filament composition be embedded on labyrinth casing, brush rotates along rotor reversely certain inclination angle, so,
The brush filament being obedient to can tilt to absorb rotor radial skew, and is easy to recover closure state, owing to brush filament adapts to rotor
Moment eccentric and the most quickly make a concession, the phenomenon of damaging rotor will not occur, be theoretically obtainable zero clearance seal, peace
Typically gap minimum being reduced to 0.05mm in dress, labyrinth casing material size is identical with former packing, but assemblage gap only needs former setting
The 1/3 to 1/2 of evaluation, reduces flow area, thus decreases leakage, and packing is effective.
The direction of the brush filament of existing brush steam seal is all that the radial direction of the rotating shaft with rotor is identical, steam turbine two adjacent groups
Having gap between impeller and dividing plate, during wheel rotation, air-flow can enter gap between the two, forms turbulent flow, have impact on steaming
The proper flow direction of vapour air-flow, and turbulent flow reduces the temperature of steam.Finally result in cylinder of steam turbine inefficiency.
Summary of the invention
It is an object of the invention to overcome the inefficient problem of cylinder of steam turbine in prior art, and a kind of axially mounted brush is provided
Formula packing and utilize the steam turbine of this axially mounted brush steam seal.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of axially mounted brush steam seal, it is characterised in that described brush steam seal is by the end to end labyrinth ring group of multistage
Becoming, described labyrinth ring includes: labyrinth ring body and brush ring, and described brush ring includes front plate, rear plate and is folded in described fore-clamp
Metal brush filament between plate and described rear plate, described brush ring is arranged on the front side of described labyrinth ring body, and described labyrinth ring is originally
The rear side of body has plush copper installation portion, and the direction of described metal brush filament is the most identical with described labyrinth ring body.
Further, the cross section of described plush copper installation portion is L-shaped and circumferentially extending along described labyrinth ring body.
Further, the cross section of described plush copper installation portion is T-shaped and circumferentially extending along described labyrinth ring body.
Further, the front side of described labyrinth ring body has brush ring mounting groove and riveting groove, and described brush ring is arranged on institute
In stating brush ring mounting groove and in described riveting groove, described brush ring is riveted together with described labyrinth ring body.
Further, being provided with one groove on front side of described labyrinth ring body, this groove is slideway, and the rear side of described groove sets
There is multiple axially extended top wire hole along described labyrinth ring body, described top wire hole has screw thread, described axially mounted brush
Formula packing also includes spring and the puller bolt with described top wire hole threaded engagement, and described brush ring slips into described vapour from described groove
Seal ring is the most internal, and one end of described spring withstands on the rear end of described labyrinth ring, and the other end withstands on the front end of described puller bolt.
Further, described top wire hole is shoulder hole, including the first hole set gradually from front to back and the second hole, described
The diameter in the first hole is less than the diameter in described second hole, and described spring is arranged in described first hole；Described second hole is screw thread
Hole, coordinates with described puller bolt.
Further, described metallic brush filament diameter is 0.05～0.2mm, hardness >=80HB.
The most described metal brush filament is 20 °～60 ° with the axial angle of described labyrinth ring body.
A kind of axially mounted brush steam seal of steam turbine, it is characterised in that the axially mounted brush steam seal of described steam turbine is used for
Sealing the gap between impeller and the dividing plate of steam turbine, the front side of described impeller has the packing making described plush copper installation portion slip into
Mounting groove；Described metal brush filament is towards described dividing plate.
Further, the axially mounted brush steam seal of described steam turbine is fixing with the riveting of described impeller.
Compared with prior art, the present invention has the advantages that apparently
1, the plush copper installation portion of the axially mounted brush steam seal of the steam turbine of the present invention slips into the packing mounting groove of impeller, installs
Convenient.
2, steam turbine axially mounted brush steam seal is installed between impeller and the dividing plate of the steam turbine of the present invention, the closeest
Seal the gap between impeller and dividing plate, improve the cylinder efficiency of steam turbine.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is embodiment one axially mounted brush steam seal front view；
Fig. 2 is embodiment one axially mounted brush steam seal left view sectional view；
Fig. 3 is embodiment one steam turbine schematic diagram；
Fig. 4 is K portion enlarged drawing in Fig. 3；
Fig. 5 is embodiment two axially mounted brush steam seal left view sectional view；
Fig. 6 is embodiment three axially mounted brush steam seal left view sectional view.
In figure, 1, axle, 2, impeller, 21, packing mounting groove, 3, dividing plate, 4, axially mounted brush steam seal, 41, labyrinth ring this
Body, 411, plush copper installation portion, 412, brush ring mounting groove, 413, riveting groove, 414, groove, 415, top wire hole, the 4151, first hole,
4152, the second hole, 416, spring, 417, puller bolt, 42, brush ring, 421, front plate, 422, rear plate, 423, metal brush filament.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with
Drawings and Examples, are further elaborated to the present invention.Should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
In describing the invention, it is to be understood that term " radially ", " axially ", " on ", D score, " top ", " end ",
Orientation or the position relationship of the instruction such as " interior ", " outward " are based on orientation shown in the drawings or position relationship, are for only for ease of and retouch
State the present invention and simplify description rather than instruction or imply that the device of indication or element must have specific orientation, with specific
Azimuth configuration and operation, be therefore not considered as limiting the invention.In describing the invention, except as otherwise noted,
" multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " is set
Put ", " connection " should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, can basis
Concrete condition understands above-mentioned term concrete meaning in the present invention.
Embodiment one
Axially mounted brush steam seal as shown in Figure 1, is made up of four sections of end to end labyrinth rings, and labyrinth ring includes: vapour
Seal ring body 41 and brush ring 42.As in figure 2 it is shown, brush ring 42 includes front plate 421, rear plate 422 and is folded in front plate 421 and
Metal brush filament 423 between rear plate 422, brush ring 42 is arranged on the front side of labyrinth ring body 41, the rear side of labyrinth ring body 41
Having plush copper installation portion 411, the direction of metal brush filament 423 is the most identical with labyrinth ring body 41.
In the present embodiment, the cross section of plush copper installation portion 411 is L-shaped and circumferentially extending along labyrinth ring body 41.
The front side of labyrinth ring body 41 has brush ring mounting groove 412 and riveting groove 413, and brush ring 42 is arranged on brush ring mounting groove
In 412 and in riveting groove 413, brush ring 42 is riveted together with labyrinth ring body 41.
Steam turbine as shown in Figure 3 and Figure 4, including axle 1, impeller 2, dividing plate 3 and above-mentioned axially mounted brush steam seal 4, axle
It is used for sealing the gap between impeller 2 and dividing plate 3 to installing brush steam seal 4；The front side of impeller 2 has makes plush copper installation portion 411
The packing mounting groove 21 slipped into；Metal brush filament 423 is towards dividing plate 3 (direction the most wiry and the centerline axis parallel of axle 1).Axle
Fixing with impeller 2 riveting to installing brush steam seal 4.
In the present embodiment, metal brush filament 423 a diameter of 0.05～0.2mm, hardness >=80HB, tensile strength >=800Mpa,
The close-packed arrays axial at an angle of metal brush filament 423 and labyrinth ring body 41, thickness >=1.5mm, metal brush filament 423 with
The axial angle of labyrinth ring body 41 is 20 °～60 °.
Embodiment two
As it is shown in figure 5, be with the difference of embodiment one, the cross section of plush copper installation portion 411 is T-shaped and along labyrinth ring
Body 41 circumferentially extending.
Embodiment three
Axially mounted brush steam seal as shown in Figure 6, is provided with one groove 414 on front side of labyrinth ring body 41, this groove 414
For slideway, the rear side of groove 414 is provided with multiple axially extended top wire hole 415 along labyrinth ring body 41, and top wire hole 415 has
Screw thread, axially mounted brush steam seal is had also to include spring 416 and the puller bolt 417 with top wire hole 415 threaded engagement, brush ring 42
Slipping in described labyrinth ring body 41 from groove 414, one end of spring 416 withstands on the rear end of described labyrinth ring, and the other end withstands on
The front end of puller bolt 417.
In the present embodiment, top wire hole 415 is shoulder hole, including the first hole 4151 and the second hole set gradually from front to back
4152, the diameter in the first hole 4151 is less than the diameter in the second hole 4152, and spring 416 is arranged in the first hole 4151；Second hole
4152 is screwed hole, coordinates with puller bolt 417.
Axially mounted brush steam seal has fabulous elasticity, metal brush filament 423 with dividing plate 3 collide mill time, can be elastic
Make a concession, again due to the effect in brush filament gap, the direction of motion can be changed and become and main flow after making to flow uniformly in entrance brush filament
The horizontal stream that direction is vertical, and then create self sealss effect, thus reduce leakage further.There is good seal performance and structure
The advantages such as advantages of simple.
The above-mentioned desirable embodiment according to the present invention is enlightenment, and by above-mentioned description, relevant staff is complete
Various change and amendment can be carried out in the range of without departing from this invention technological thought.This invention technical
Scope is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (10)
1. an axially mounted brush steam seal, it is characterised in that described axially mounted brush steam seal is by the end to end vapour of multistage
Seal ring form, described labyrinth ring includes: labyrinth ring body (41) and brush ring (42), described brush ring (42) include front plate (421),
Rear plate (422) and the metal brush filament (423) being folded between described front plate (421) and described rear plate (422), described brush
Ring (42) is arranged on the front side of described labyrinth ring body (41), and the rear side of described labyrinth ring body (41) has plush copper installation portion
(411), the direction of described metal brush filament (423) and described labyrinth ring body (41) is the most identical.
Axially mounted brush steam seal the most according to claim 1, it is characterised in that the horizontal stroke of described plush copper installation portion (411)
Cross section is L-shaped and circumferentially extending along described labyrinth ring body (41).
Axially mounted brush steam seal the most according to claim 1, it is characterised in that the horizontal stroke of described plush copper installation portion (411)
Cross section is T-shaped and circumferentially extending along described labyrinth ring body (41).
Axially mounted brush steam seal the most according to claim 1, it is characterised in that the front side of described labyrinth ring body (41)
There is brush ring mounting groove (412) and riveting groove (413), described brush ring (42) be arranged in described brush ring mounting groove (412) and from
In described riveting groove (413), described brush ring (42) is riveted together with described labyrinth ring body (41).
Axially mounted brush steam seal the most according to claim 1, it is characterised in that described labyrinth ring body (41) front side sets
Having one groove (414), this groove (414) is slideway, and the rear side of described groove (414) is provided with multiple along described labyrinth ring body
(41) axially extended top wire hole (415), described top wire hole (415) has screw thread, and described axially mounted brush steam seal is also
Including spring (416) and with the puller bolt (417) of described top wire hole (415) threaded engagement, described brush ring (42) is from described recessed
Groove (414) slips in described labyrinth ring body (41), and one end of described spring (416) withstands on the rear end of described labyrinth ring, another
End withstands on the front end of described puller bolt (417).
Axially mounted brush steam seal the most according to claim 5, it is characterised in that described top wire hole (415) is shoulder hole,
Including the first hole (4151) set gradually from front to back and the second hole (4152), the diameter of described first hole (4151) is less than institute
Stating the diameter of the second hole (4152), described spring (416) is arranged in described first hole (4151)；Described second hole (4152) is
Screwed hole, coordinates with described puller bolt (417).
7. according to the axially mounted brush steam seal described in any one of claim 1-6, it is characterised in that described metal brush filament
(423) a diameter of 0.05～0.2mm, hardness >=80HB.
8. according to the axially mounted brush steam seal described in any one of claim 1-6, it is characterised in that described metal brush filament
(423) the axial angle with described labyrinth ring body (41) is 20 °～60 °.
9. the axially mounted brush steam seal of steam turbine, it is characterised in that the axially mounted brush steam seal of described steam turbine is for close
Gap between impeller and the dividing plate of envelope steam turbine, the front side of described impeller (2) has makes described plush copper installation portion (411) slip into
Packing mounting groove (21)；Described metal brush filament (423) is towards described dividing plate (3).
The axially mounted brush steam seal of steam turbine the most according to claim 9, it is characterised in that described turbine shaft is to peace
Dress brush steam seal is fixing with described impeller (2) riveting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610755990.9A CN106194279A (en) | 2016-08-27 | 2016-08-27 | The axially mounted brush steam seal of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610755990.9A CN106194279A (en) | 2016-08-27 | 2016-08-27 | The axially mounted brush steam seal of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106194279A true CN106194279A (en) | 2016-12-07 |
Family
ID=58088451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610755990.9A Pending CN106194279A (en) | 2016-08-27 | 2016-08-27 | The axially mounted brush steam seal of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194279A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483211A (en) * | 2022-03-03 | 2022-05-13 | 南京航空航天大学 | Sealing device for reducing gap leakage |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292061A (en) * | 1998-02-19 | 2001-04-18 | 西门子公司 | Sealing device and use of sealing device |
| JP2005127198A (en) * | 2003-10-23 | 2005-05-19 | Hitachi Ltd | Turbine and sealing structure of stationary blade root section and moving blade root section |
| CN101371020A (en) * | 2005-12-12 | 2009-02-18 | 伊顿公司 | Axial dynamic brush seal |
| CN103403300A (en) * | 2011-01-31 | 2013-11-20 | 通用电气公司 | Axial brush seal |
| CN103883363A (en) * | 2014-04-02 | 2014-06-25 | 江苏透平密封高科技有限公司 | Non-contact type brush-type seal and manufacturing method thereof |
| CN103982244A (en) * | 2014-05-21 | 2014-08-13 | 南京博沃科技发展有限公司 | Blade-retractable steam seal and mounting and debugging method thereof |
| WO2014158589A1 (en) * | 2013-03-13 | 2014-10-02 | United Technologies Corporation | Multi-axial brush seal |
| CN104420895A (en) * | 2013-09-03 | 2015-03-18 | 航空技术空间股份有限公司 | Turbomachine Axial Compressor Seal with a Brush Seal |
| CN204371428U (en) * | 2014-12-25 | 2015-06-03 | 南京兆能节能科技有限公司 | Flexible slideway formula brush steam seal |
| CN206054007U (en) * | 2016-08-27 | 2017-03-29 | 朱艳君 | The axially mounted brush steam seal of steam turbine |
-
2016
- 2016-08-27 CN CN201610755990.9A patent/CN106194279A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292061A (en) * | 1998-02-19 | 2001-04-18 | 西门子公司 | Sealing device and use of sealing device |
| JP2005127198A (en) * | 2003-10-23 | 2005-05-19 | Hitachi Ltd | Turbine and sealing structure of stationary blade root section and moving blade root section |
| CN101371020A (en) * | 2005-12-12 | 2009-02-18 | 伊顿公司 | Axial dynamic brush seal |
| CN103403300A (en) * | 2011-01-31 | 2013-11-20 | 通用电气公司 | Axial brush seal |
| WO2014158589A1 (en) * | 2013-03-13 | 2014-10-02 | United Technologies Corporation | Multi-axial brush seal |
| CN104420895A (en) * | 2013-09-03 | 2015-03-18 | 航空技术空间股份有限公司 | Turbomachine Axial Compressor Seal with a Brush Seal |
| CN103883363A (en) * | 2014-04-02 | 2014-06-25 | 江苏透平密封高科技有限公司 | Non-contact type brush-type seal and manufacturing method thereof |
| CN103982244A (en) * | 2014-05-21 | 2014-08-13 | 南京博沃科技发展有限公司 | Blade-retractable steam seal and mounting and debugging method thereof |
| CN204371428U (en) * | 2014-12-25 | 2015-06-03 | 南京兆能节能科技有限公司 | Flexible slideway formula brush steam seal |
| CN206054007U (en) * | 2016-08-27 | 2017-03-29 | 朱艳君 | The axially mounted brush steam seal of steam turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483211A (en) * | 2022-03-03 | 2022-05-13 | 南京航空航天大学 | Sealing device for reducing gap leakage |
| CN114483211B (en) * | 2022-03-03 | 2022-12-27 | 南京航空航天大学 | Sealing device for reducing gap leakage |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |
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| WD01 | Invention patent application deemed withdrawn after publication |