CN110513484A - A kind of combined type pass damping seal with flanging damping type hole - Google Patents
A kind of combined type pass damping seal with flanging damping type hole Download PDFInfo
- Publication number
- CN110513484A CN110513484A CN201910819971.1A CN201910819971A CN110513484A CN 110513484 A CN110513484 A CN 110513484A CN 201910819971 A CN201910819971 A CN 201910819971A CN 110513484 A CN110513484 A CN 110513484A
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- CN
- China
- Prior art keywords
- cylinder
- flanging
- damping
- liner
- sealed cylinder
- 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
- 238000013016 damping Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 210000004907 gland Anatomy 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
Abstract
A kind of combined type pass damping seal with flanging damping type hole, including the successively liner sealed cylinder of fitting from inside to outside, intermediate seal cylinder and outer layer sealed cylinder, the equally distributed damping type hole with flanging is machined on the circumferential surface of liner sealed cylinder, it is processed into right angle flange outward in one end of liner sealed cylinder, intermediate seal cylinder is straight barrel type cylinder and cylinder is equipped with equally distributed circumferential chute, the diameter of type hole is damped no more than the diameter of chute and the center line overlapping in two holes, outer layer sealed cylinder is the ring week solid type cylinder that right angle flange is inwardly processed into an end, three layers of combined labyrinth and carbon gland sleeve are inlayed together and the inner end that combines with outer layer sealed cylinder of liner sealed cylinder is equipped with assistant spring body sealing ring.The present invention can reduce sealing leak rate, improve leakproofness, and the economy of pass damping seal can be improved in the sealing stator face being convenient for changing.
Description
Technical field
The present invention relates to turbomachinery fluid seals technology fields, are suitable for various gas turbines, steam turbine, compressor etc.
The axle end sealing device of turbomachinery belongs to cylinder sealing technique.
Background technique
The continuous improvement of rotating machine art level, it is closely related with continuously improving for sealing device and topology update.Mesh
Before, the sealing element for rotatable parts and stationary parts is many kinds of, such as: brush seal, labyrinth seal, honeycomb seal and hole
Type damping seal, pocket type damping seal etc..Wherein, labyrinth seal is turbomachinery because its structure is relatively easy and at low cost
In most common sealing device, labyrinth seal is by a series of expansion clearances for being formed between sealing tooth and rotor and the sky that dissipates
Chamber, when the expanded gap of leakage fluid flows, partial pressure can be converted into speed energy, by fluid generate throttling and thermodynamics
The pressure of effect, leak fluid reduces step by step and reaches sealing effect.Currently, rotating machinery is increasingly to high temperature, high rotary speed direction
Development.And labyrinth teeth is easy to scrape rotatable parts when shaft is high-revolving, tooth tip easily lodges, therefore labyrinth in order to prevent
Tooth tip lodging, seal clearance will increase, the decline of Drain Resistance effect.In recent years, honeycomb damping seal is because of its good Drain Resistance effect
Fruit and excellent dynamic characteristics start in the sealing at the between centers being used in some turbomachineries or tip clearance position, still
Honeycomb damping seal is usually that nickel-base alloy is made of soldering tech, and production is cumbersome, expensive, makes its popularization and use
It is restricted, it is difficult to be formed large-scale universal.And it is considered as the aluminum pass damping seal of the excellent substitute of honeycomb seal,
The disadvantages mentioned above of honeycomb seal can be evaded well.Generally believe that the relatively good sealing structure of Drain Resistance effect is labyrinth-at present
Honeycomb combined labyrinth and carbon gland, the sealing structure set honeycomb structure to the stationary part of sealing element, by maze member and shaft system
Integrally, maze member is rotated also with shaft when the spindle is rotated.In high revolving speed, substantially vibrate operating condition under, labyrinth-honeycomb group
The labyrinth teeth of box-like sealing is equally also easy to produce lodging and abrasion, and whole shaft is needed replacing when serious, and not only maintenance capacity is huge, and
And huge economic losses can be brought, 205350364 U of patent CN 105114629 B and CN has been described.In short, existing
Sealing be unable to satisfy turbomachinery and should adapt to the application of high duty parameter, there is good Drain Resistance effect again, and add
Work manufactures the composite requests such as simplicity.
Summary of the invention
The present invention will overcome traditional labyrinth seal easily to lodge and disadvantage easy to wear, and legacy cellular damping seal is overcome to make
Cumbersome, expensive disadvantage, and the typical defect that traditional pass damping seal flow-disturbing is ineffective, provide a kind of cost
Cheap, manufacture is easy, choked flow and a kind of combination with flanging damping type hole apparent compared to above-mentioned sealing improvement of flow-disturbing effect
Formula pass damping seal.
The technical scheme is that
A kind of combined type pass damping seal with flanging damping type hole, it is characterised in that: the liner including successively fitting
Sealed cylinder 4, intermediate seal cylinder 3 and outer layer sealed cylinder 2, liner sealed cylinder 4, intermediate seal cylinder 3 and outer layer sealing
The cylinder cylindrical of cylinder 2 and axial line is on the same line to be inboard close to axial line side, otherwise is outside；
It is machined with equally distributed damping type hole 41 on the circumferential surface of the liner sealed cylinder 4, damps the week of type hole 41
To one end have the flanging 42 to inboard protrusion, the big end opening of flanging 42 meets to airintake direction, the liner sealed cylinder 4
An end have the first flanging for flexing outward, it is recessed that right end sealing ring is formed between the first flanging and outer layer sealed cylinder 2
Slot 33；
The 3 cylinder wall surface of intermediate seal cylinder is equipped with equally distributed chute 31, and chute 31 is along intermediate seal cylinder
The annular close passage of the circumferentially extending of body 3；
Both the diameter of the damping type hole 41 is not more than the diameter of the chute 31, and the center line overlapping of the two, i.e.,
Center line be located on the same cross section perpendicular to axis；The end far from the first flanging of the outer layer sealed cylinder 2
With the second inside flanging, left end o-ring groove 32, three-layer sealed sleeve are formed between the second flanging and liner sealing drum 4
It inlays together, is equipped with assistant spring body sealing ring in left end o-ring groove 32 and right end o-ring groove 33.
Preferably, the band damping type hole is selected from one of following: round hole, raindrop shape hole, slotted eye, hexagonal hole.
Preferably, the liner sealed cylinder radial thickness range be 0.2~2.0mm, preferred thickness range be 0.5~
1.0mm。
The middle layer sealed cylinder radial thickness range is 0.5~10mm.
The diameter of tuck portion on the liner sealed cylinder is D/n, and wherein D is the diameter in hole on liner sealed cylinder
Size, D are taken as 2~10mm, n be 1~5, D be tuck portion end height, D is according to the axis between common sealing and shaft
Between gap or shroud labyrinth clearance take 0.5~5mm, can obtain the angular range of flanging Yu liner cylinder.
The working principle of the invention is:
Using liner sealed cylinder, middle layer sealed cylinder and the knockdown pass damping seal of outer layer sealed cylinder, lead to
It is nested after layer by layer, it is formed using breathing method insert.When specific installation, notice that the installation direction of liner sealed cylinder will make air inlet side
To contrary with the flanging of thin interior lining, as big end opening of the airintake direction against flanging.When gas flows into sealing stator
The flanging that a part is sealed due to liner when face and shaft gap stops the flow direction for changing flowing, along the protrusion of liner cylinder
Flanging inner wall, which flows into middle layer sealant and damps, carries out whirlpool dissipation in the chute that type hole is superimposed；Another part not due to
Liner sealed cylinder and the air-flow for changing path continue to flow along the gap of liner and the inner wall of shaft, fraction warp
Meeting and similar to when passing through labyrinth seal clearance tooth tip blockage effect is generated when the flanging tip crossed in liner sealing, with whirlpool
Dissipation, which is coupled, to be achieved the purpose that reduce leakage.
The invention has the advantages that
(1) this combination dexterously combines the advantage of labyrinth seal and pass damping seal respectively, while again due to fitting
Liner sealed cylinder be mounted on static bulkhead seal and quality is softer, therefore can avoid labyrinth seal in big vibration with
The problem of touching mill and lodging of shaft.
(2) simultaneously, the structure of layering only need to change most interior when sealing element and shaft occur to scrape, touch mill
The liner sealed cylinder of layer reduces the cost and workload of sealing maintenance to improve the replaceability of sealing element.
In conclusion the present invention can not only reduce sealing leak rate compared to classical round straight hole damping seal, improve close
Feng Xing, and safeguard that replacement sealing stator face is simple and convenient, substantially increase the economy of pass damping seal.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structure cut-away view of sealed cylinder of the invention.
Fig. 2 a is the partial enlarged view of Fig. 2.
Fig. 3 is the structural schematic diagram of the raised flanging on liner sealed cylinder of the invention.
Wherein: the left end 1- sealing ring；2- outer layer sealed cylinder；3- intermediate seal cylinder；4- liner sealed cylinder；5- right end
Sealing ring；31- chute；The left end 32- o-ring groove；33-right end o-ring grooves；Damping type hole of the 41- with flanging；In 42-
Serve as a contrast the flanging that type hole is damped on sealed cylinder
Specific embodiment
Implementation of the invention is described in further detail with reference to the accompanying drawing:
Referring to Fig. 1,2 and 3, a kind of combined type pass damping seal with flanging damping type hole, including three layers of combined type are close
Big envelope cylinder and interlayer assistant spring body sealing ring.Three layers of combined labyrinth and carbon gland sleeve include liner sealed cylinder 4, intermediate close
Sealed tube body 3 and outer layer sealed cylinder 2 are machined with the equally distributed resistance with flanging 42 on the circumferential surface of the liner sealed cylinder
Right angle flange is processed into Buddhist nun's type hole 41, an end of the liner sealed cylinder outward, and the intermediate seal cylinder is straight tube
Type tube body and equally distributed chute 31 is machined on cylinder ring week, the diameter of the damping type hole 41 is not more than the chute 31
Diameter and the two center line overlap, the outer layer sealed cylinder 2 be an end be inwardly processed into right angle flange ring week it is real
The end right angle flange of figure cylinder, the liner sealed cylinder and outer layer sealed cylinder is formed radially for placing sealing ring
Groove 32 and 33, three layers of combined labyrinth and carbon gland sleeve is inlayed together and liner sealed cylinder is combined with outer layer sealed cylinder
Inner end be equipped with elastomer-assisted left end sealing ring 1 and right end sealing ring 5.It damps type hole 41 and chute 31 can be raindrop shape
Hole, 4 radial thickness range of liner sealed cylinder are 0.2~2.0mm, and preferred thickness range is 0.5~1.0mm, middle layer sealing
3 radial thickness range of cylinder is 0.5~10mm.The diameter of tuck portion 42 is D/n, and wherein D is to damp on liner sealed cylinder
The diameter of type hole 41, D are taken as 2~10mm, and it is the height of the end of tuck portion that n, which takes 1~5, D, and D is according to common sealing
Between centers gap or shroud labyrinth clearance between shaft take 0.5~5mm, can obtain the angle model of flanging Yu liner cylinder
It encloses.
Content described in this specification case study on implementation is only enumerating to the way of realization of inventive concept, guarantor of the invention
Shield range is not construed as being only limitted to the concrete form that case study on implementation is stated, protection scope of the present invention is also and in this field
Technical staff conceives the thinkable equivalent technology means of institute according to the present invention.
Claims (4)
1. a kind of combined type pass damping seal with flanging damping type hole, it is characterised in that: the liner including successively fitting is close
Sealed tube body (4), intermediate seal cylinder (3) and outer layer sealed cylinder (2), liner sealed cylinder (4), intermediate seal cylinder (3) and
Outer layer sealed cylinder (2) cylinder cylindrical and axial line is on the same line, it is on the contrary to be inboard close to axial line side
For outside；
Equally distributed damping type hole (41) is machined on the circumferential surface of the liner sealed cylinder (4), damping type hole (41)
Circumferential one end has the flanging (42) to inboard protrusion, and the big end opening of flanging (42) is met to airintake direction, and the liner is close
One end of sealed tube body (4) has the first flanging flexed outward, is formed between the first flanging and outer layer sealed cylinder (2) right
It holds o-ring groove (33)；
The cylinder wall surface of the intermediate seal cylinder (3) is equipped with equally distributed chute (31), and chute (31) is along intermediate close
The annular close passage of the circumferentially extending of sealed tube body (3)；
The diameter of damping type hole (41) is not more than the diameter of the chute (31), and the center line overlapping of the two；
The end far from the first flanging of the outer layer sealed cylinder (2) is with the second inside flanging, the second flanging and liner
Left end o-ring groove (32) are formed between sealing drum (4), three-layer sealed sleeve is inlayed together, left end o-ring groove (32)
With right end o-ring groove (33) in be equipped with assistant spring body sealing ring.
2. a kind of combined type pass damping seal with flanging damping type hole according to claim 1, it is characterised in that: institute
The shape of damping type hole (41) is stated selected from one of following: round hole, raindrop shape hole, slotted eye, hexagonal hole.
3. a kind of combined type pass damping seal with flanging damping type hole according to claim 1 or 2, feature exist
In: the liner sealed cylinder (4) with a thickness of 0.2~2.0mm；The middle layer sealed cylinder (3) with a thickness of 0.5~
10mm；The diameter of tuck portion on liner sealed cylinder (4) is D/n, and wherein D is damp type on liner sealed cylinder circumferential surface
The diameter in hole, D are taken as 2~10mm, and n is 1~5, and Δ D is the height of the end of tuck portion, and Δ D is according to common sealing
Between centers gap or shroud labyrinth clearance between shaft take 0.5~5mm.
4. a kind of combined type pass damping seal with flanging damping type hole according to claim 3, it is characterised in that: institute
The preferred thickness range for stating liner sealed cylinder (4) is 0.5~1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819971.1A CN110513484A (en) | 2019-08-31 | 2019-08-31 | A kind of combined type pass damping seal with flanging damping type hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819971.1A CN110513484A (en) | 2019-08-31 | 2019-08-31 | A kind of combined type pass damping seal with flanging damping type hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513484A true CN110513484A (en) | 2019-11-29 |
Family
ID=68629020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910819971.1A Pending CN110513484A (en) | 2019-08-31 | 2019-08-31 | A kind of combined type pass damping seal with flanging damping type hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513484A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113775762A (en) * | 2021-08-25 | 2021-12-10 | 浙江工业大学 | Hole-type damping sealing structure with dovetail diversion trenches |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2913750Y (en) * | 2005-07-28 | 2007-06-20 | 上海大学 | Labyrinth sealing device having high hermeticity and high operation stability |
| CN201874517U (en) * | 2010-12-02 | 2011-06-22 | 重庆智延科技发展有限公司 | Compression type packer sealing cylinder used in oil and gas field |
| CN201972955U (en) * | 2011-04-13 | 2011-09-14 | 大连理工大学 | Dynamic and static clearance wedge groove arc sealing structure for nuclear main pump |
| CN105134954A (en) * | 2015-09-14 | 2015-12-09 | 沈阳航空航天大学 | Novel hole type sealing structure capable of improving sealing characteristic and damping characteristic |
| CN105179696A (en) * | 2015-09-14 | 2015-12-23 | 沈阳航空航天大学 | Novel rotor structure for hole-pattern seal |
| CN108397416A (en) * | 2018-02-24 | 2018-08-14 | 西安交通大学 | A kind of non-homogeneous controllable chamber rotary seal structure |
| CN211117608U (en) * | 2019-08-31 | 2020-07-28 | 浙江工业大学 | Combined hole type damping seal with edgefold damping holes |
-
2019
- 2019-08-31 CN CN201910819971.1A patent/CN110513484A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2913750Y (en) * | 2005-07-28 | 2007-06-20 | 上海大学 | Labyrinth sealing device having high hermeticity and high operation stability |
| CN201874517U (en) * | 2010-12-02 | 2011-06-22 | 重庆智延科技发展有限公司 | Compression type packer sealing cylinder used in oil and gas field |
| CN201972955U (en) * | 2011-04-13 | 2011-09-14 | 大连理工大学 | Dynamic and static clearance wedge groove arc sealing structure for nuclear main pump |
| CN105134954A (en) * | 2015-09-14 | 2015-12-09 | 沈阳航空航天大学 | Novel hole type sealing structure capable of improving sealing characteristic and damping characteristic |
| CN105179696A (en) * | 2015-09-14 | 2015-12-23 | 沈阳航空航天大学 | Novel rotor structure for hole-pattern seal |
| CN108397416A (en) * | 2018-02-24 | 2018-08-14 | 西安交通大学 | A kind of non-homogeneous controllable chamber rotary seal structure |
| CN211117608U (en) * | 2019-08-31 | 2020-07-28 | 浙江工业大学 | Combined hole type damping seal with edgefold damping holes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113775762A (en) * | 2021-08-25 | 2021-12-10 | 浙江工业大学 | Hole-type damping sealing structure with dovetail diversion trenches |
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