CN107830179A - A kind of annular seal assembly that can effectively improve rotor dynamic behavior - Google Patents
A kind of annular seal assembly that can effectively improve rotor dynamic behavior Download PDFInfo
- Publication number
- CN107830179A CN107830179A CN201711137112.1A CN201711137112A CN107830179A CN 107830179 A CN107830179 A CN 107830179A CN 201711137112 A CN201711137112 A CN 201711137112A CN 107830179 A CN107830179 A CN 107830179A
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- China
- Prior art keywords
- groove
- rotor
- circumference
- seal assembly
- annular seal
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Classifications
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- 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
- F16J15/4472—Labyrinth packings with axial path
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a kind of annular seal assembly that can effectively improve rotor dynamic behavior, including rotor and the sealing shroud being set on rotor, the outer surface of the rotor either sets the combination of multi-detector groove or multi-detector groove and multiple rows of circumference labyrinth groove on the inner surface of sealing shroud, multi-detector groove annular seal assembly and helicla flute labyrinth annular seal assembly are formed respectively, multi-detector groove annular seal assembly utilizes uniform zigzag high pressure caused by helicla flute dynamic pressure effect and pumping effect, centring property when eccentric during raising rotor operation, and effectively rotor pyramid type whirling motion caused by suppression bias；Helicla flute labyrinth annular seal assembly increases flow resistance using throttling action caused by helicla flute dynamic pressure effect and pumping effect and circumference labyrinth groove structure, reduction leakage rate, improves fluid film damping, strengthens rotor run stability.
Description
Technical field
The present invention relates to ring packing, more particularly to a kind of annular seal assembly that can effectively improve rotor dynamic behavior.
Background technology
With the development of industrial technology, to the performance requirement of the rotary fluid machine with ring packing gap increasingly
Height, under the operating modes such as some high pressures, high speed, high temperature, particularly in the fields such as Aero-Space, nuclear power station, petrochemical industry, armature spindle
It is often bigger to size and radial dimension, and require that rotor realizes high rotating speed, low vibration, therefore good centring property is to turn
The key condition of sub- steady running.The research of forefathers also indicates that ring packing gap is to rotor run stability and critical speed
There is highly important influence etc. dynamic characteristics, especially as the continuous improvement of machining accuracy, the reduction of annular gap size, its
Influence proportion to rotor dynamic behavior is bigger.
In order to realize the high rotating speed of rotor, low vibration, centring property and stability, in terms of engineering, current method are improved
Rotor manufacture level is mainly improved by rotor static and dynamic test in itself, and improves constantly installation accuracy, it is ensured that rotor
Reliability of operation；It is main to consider various outside exciting forces and itself uneven exciting force in operation process in terms of research
Influence to rotor dynamic behavior, wherein outside exciting force source is mainly included between the supporting bearing to play a supportive role and each annular
Imbalance that the stability of gap, moving fluid influence of unbalance power and processing, alignment error are brought etc..
The influence to critical rotor speed, centering and run stability is considered from gap annular seal aspect, to annular
Seal assembly carries out transformation and optimization, still lacks at present widely studied.At present, all it is often to the transformation and optimization of annular seal assembly
Carried out from leakage rate and Wear angle.In order to realize the low vibration of high rotating speed rotor, rotor run stability, domestic granddad are improved
The related patent of cloth.Chinese patent CN203783951U, CN201982359U disclose a kind of annular of tooth slot structure respectively
Seal assembly and a kind of conical surface labyrinth seal annular seal assembly, both of which can strengthen sealing effectiveness, reduce leakage rate, prevent
Particle blocks, while also has increase damping, strengthens the effect of rotor stability；Chinese patent CN205578041U,
CN201496528U, CN102200140A, CN102953771A disclose the annular seal assembly of different structure, its major function
It is to throttle, reduces leakage, and increase damping, improves rotor stability；European patent EP 3101293A1 discloses one kind with recessed
The sealed bearing assembly of groove, it can reach reduction leakage, and increase fluid film damps, and improves the effect of rotor stability；It is European special
Sharp EP2538030A1 discloses a kind of annular labyrinth seal assemblies, its role is to throttle, reduces leakage, and increases damping, carries
High rotor stability.Above patent all only emphasizes that rotor stability improves and leakage rate reduces, without considering critical turn
Speed, the influence of centering.
In summary, it is relatively low to there is big leakage rate, centering and less stable, critical speed in annular gap smooth seal
The problems such as, and existing labyrinth seal not can solve critical rotor speed and centering sex chromosome mosaicism；Single helicla flute is made
It is big that the non-contact ring packing of type not can solve leakage rate under the slow-speed of revolution, the whirling motion of rotor circular cone and stable sex chromosome mosaicism.
The content of the invention
For Shortcomings in the prior art, the annular close of rotor dynamic behavior is can effectively improve the invention provides a kind of
Sealing assembly, ring packing interstitial fluid film dynamics is can effectively improve, reduce leakage rate, improve critical rotor speed, increased
Strong rotor centring property and stability, avoid rotor pyramid type whirling motion.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of annular seal assembly that can effectively improve rotor dynamic behavior, including rotor and the sealing that is set on rotor
Set, the outer surface of the rotor or the inner surface of sealing shroud are provided with multi-detector groove, and multiple helicla flutes are along rotor or sealing
The equidistant row's helicla flute of arrangement form one of circumference of set, dislocation or the multiple rows of spiral shell of order arrangement form between adjacent two rows helicla flute
Spin slot, the rotor and sealing shroud form multi-detector groove annular seal assembly.
Preferably, the outer surface of the rotor is provided with multi-detector groove and multiple rows of circumference labyrinth groove, or sealing simultaneously
Multi-detector groove and multiple rows of circumference labyrinth groove are provided with simultaneously on set inner surface, multiple circumference labyrinths groove is circumferentially equidistantly arranged
Row shape circumference labyrinth groove in a row, formation multiple rows of circumference labyrinth groove arranged in parallel between the groove of adjacent two rows circumference labyrinth,
The inlet and outlet section of the rotor or sealing shroud is respectively provided with multi-detector groove, and the interlude of the rotor or sealing shroud is provided with
A row or multi-row circumferential groove, the rotor and sealing shroud form helicla flute labyrinth annular seal assembly.
Preferably, the outer surface of the rotor is provided with multi-detector groove and multiple rows of circumference labyrinth groove, or sealing simultaneously
Shape is circumferentially equidistantly arranged on set inner surface provided with multi-detector groove and multiple rows of circumference labyrinth groove, multiple circumferential grooves simultaneously
Circumferential groove in a row, it is arranged in parallel between adjacent two rows circumferential groove to form multiple rows of circumferential groove, in the inlet and outlet of sealing shroud
Section is respectively provided with multiple rows of circumferential groove, and the interlude of sealing shroud is provided with a row or multi-row helicla flute.
Preferably, the row of the multi-detector groove is relevant with the flute length of helicla flute, and the flute length of helicla flute is shorter, multiple rows of spiral shell
The row of spin slot is more.
Preferably, the section groove profile of circumference labyrinth groove is rectangle or trapezoidal.
Preferably, the groove width of the circumferential groove compares γ1=0.05~0.1, slot number n=3~7, groove depth compares h2=0.2~
1。
Preferably, it is characterised in that the groove width weir of the helicla flute is wide to compare γ1=0.3~0.8, flute length compares β1=0.2~
0.4, slot number Ng=6~20 take even number, and groove depth compares h1=0.2~1.
Beneficial effects of the present invention：
1) present invention is by the basis of the smooth seal of annular gap, the round surface in rotor outer circle curved surface or sealing shroud
On open up multi-detector groove, utilize caused by helicla flute dynamic pressure effect and pumping effect uniformly zigzag high pressure, improve rotor fortune
Centring property when eccentric during row, and effectively rotor pyramid type whirling motion caused by suppression bias；It is firm to increase fluid film simultaneously
Degree, improve critical rotor speed；
2) present invention opens up a row or multi-row helicla flute on the basis of the labyrinth seal of annular gap, utilizes helicla flute dynamic pressure
Throttling action caused by effect and pumping effect and circumference labyrinth groove structure, reduces leakage rate；And increase flow resistance, improve
Fluid film damps, and strengthens rotor run stability.
Brief description of the drawings
Fig. 1 is the schematic diagram of multi-detector groove annular seal assembly of the present invention.
Fig. 2 is tactic signal between helicla flute on sealing shroud in multi-detector groove ring packing of the present invention
Figure.
The signal of Fig. 3 Heterogeneous Permutations between helicla flute on sealing shroud in multi-detector groove ring packing of the present invention
Figure.
Fig. 4 is that the inlet and outlet section of sealing shroud in the ring packing of helicla flute labyrinth of the present invention is respectively provided with multi-detector groove
Schematic diagram.
Fig. 5 is the sealing shroud expanded schematic diagram in Fig. 4.
Fig. 6 is that the interlude of sealing shroud in the ring packing of helicla flute labyrinth of the present invention is provided with showing for multi-detector groove
It is intended to.
Fig. 7 is the sealing shroud expanded schematic diagram in Fig. 6.
In figure：
1- helicla flutes；2- circumference labyrinth groove；3- rotors；4- sealing shrouds.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
The annular seal assembly of the present invention that can effectively improve rotor dynamic behavior is multi-detector groove ring packing
Component and helicla flute labyrinth annular seal assembly, be on the basis of annular gap smooth seal or annular gap labyrinth seal,
Multi-detector groove is opened up on round surface in rotor outer circle curved surface or sealing shroud, for convenience of description, with sealing shroud inner circle song table
Exemplified by the moulding of face.
As shown in figure 1, multi-detector groove annular seal assembly of the present invention, the inner surface of sealing shroud 4 is provided with more
Circumference equidistant arrangement form one row helicla flute 1 of more than the 1 individual helicla flute 1 of helicla flute along sealing shroud 4 is arranged, as shown in Figure 2 or Figure 3,
Either Heterogeneous Permutation or order arrangement form multi-detector groove 1 between adjacent two rows helicla flute 1.The row of multi-detector groove 1
Relevant with the flute length of helicla flute 1, the flute length of helicla flute 1 is shorter, and the row that multi-detector groove 1 combines is more.The groove width weir of helicla flute 1
Width compares γ1=0.5, flute length compares β1=0.25, slot number Ng=12, helixangleβ=40 °, groove depth h1=0.05mm.
As shown in Figure 4 and Figure 5, helicla flute labyrinth of the present invention annular seal assembly, the inner surface of sealing shroud 4 are provided with
Multi-detector groove 1 and multiple rows of circumference labyrinth groove 2, the circumferentially equidistant row's circumference of arrangement form one of multiple circumference labyrinths groove 2
Labyrinth groove 2, formation multiple rows of circumference labyrinth groove 2 arranged in parallel between adjacent two rows circumference labyrinth groove 2, in sealing shroud 4
Inlet and outlet section is respectively provided with a row or multi-row helicla flute 1, and the interlude of sealing shroud 4 is provided with multiple rows of circumferential groove, the He of rotor 3
Sealing shroud 4 forms the labyrinth annular seal assembly of helicla flute 1.As shown in Figure 6 and Figure 7, the inlet and outlet section of sealing shroud 4 is respectively provided with circumference
Labyrinth groove 2, the interlude of sealing shroud 4 are provided with a row or multi-row helicla flute 1.The section groove profile of circumference labyrinth groove 2 is square
Shape is trapezoidal.The groove width of circumferential groove compares γ1=0.05~0.1, slot number n=3~7, groove depth compares h2=0.2~1.The He of helicla flute 1
2 groups of numbers of circumference labyrinth groove how much with ring packing axial length, helicla flute 1 flute length than, circumference labyrinth groove 2 groove width ratio
Relevant, the design parameter and arrangement mode of groove profile need to be determined to optimize according to actual operating mode and dielectric property.
Helicla flute of the present invention can use electrochemical corrosion, electricity to cremate, technique processing curve is micro- makes for Laser Processing etc.
Type, machining accuracy is detected using non-contact optical profilers.
Pumping and dynamic pressure effect of the present invention using helicla flute, reduce leakage rate, and make caused zigzag partial high pressure
It is axially distributed more rationally no longer to concentrate on the single outlet section of ring packing, but two is distributed or middle concentration point
Cloth, when rotor operation process occurs eccentric, it can more effectively suppress rotor eccentricity, improve rotor centring property, and effectively overcome
Pyramid type whirling motion caused by rotor tilt；Caused partial high pressure, fluid film rigidity can be improved, and then improve critical turn of rotor
Speed；Helicla flute and labyrinth groove can play increase flow resistance simultaneously, improve fluid film damping, reduce the effect of leakage rate, enter
And improve rotor run stability.
The embodiment is preferred embodiment of the invention, but the present invention is not limited to above-mentioned embodiment, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (8)
1. a kind of annular seal assembly that can effectively improve rotor dynamic behavior, it is characterised in that including rotor (3) and be set in
Sealing shroud (4) on rotor (3), the outer surface of the rotor (3) or the inner surface of sealing shroud (4) are provided with multi-detector groove
(1), the equidistant row's helicla flute (1) of arrangement form one of circumference of multiple helicla flutes (1) along rotor (3) or sealing shroud (4), adjacent two
Dislocation or order arrangement form multi-detector groove (1) between row's helicla flute (1), the rotor (3) and sealing shroud (4) form more
Arrange helicla flute (1) annular seal assembly.
2. the annular seal assembly according to claim 1 that can effectively improve rotor dynamic behavior, it is characterised in that described
Multi-detector groove (1) and multiple rows of circumference labyrinth groove are provided with the outer surface of rotor (3) or the inner surface of sealing shroud (4) simultaneously
(2), multiple circumference labyrinths groove (2) circumferentially equidistant row's circumference labyrinth groove (2) of arrangement form one, adjacent two rows circumference fan
The inlet and outlet of formation multiple rows of circumference labyrinth groove (2) arranged in parallel between palace groove (2), the rotor (3) or sealing shroud (4)
Section is respectively provided with a row or multi-row helicla flute (1), and the interlude of the rotor (3) or sealing shroud (4) is provided with multiple rows of circumference fan
Palace groove (2), the rotor (3) and sealing shroud (4) form helicla flute labyrinth annular seal assembly.
3. the annular seal assembly according to claim 1 that can effectively improve rotor dynamic behavior, it is characterised in that turning
Multi-detector groove (1) and multiple rows of circumference labyrinth groove are provided with the sub outer surface of (3) or the inner surface of sealing shroud (4) simultaneously
(2), multiple circumference labyrinths groove (2) circumferentially equidistant row's circumference labyrinth groove (2) of arrangement form one, adjacent two rows circumference fan
Formation multiple rows of circumference labyrinth groove (2) arranged in parallel, is respectively provided with multiple rows of in the inlet and outlet section of sealing shroud (4) between palace groove (2)
Circumference labyrinth groove (2), the interlude of sealing shroud (4) are provided with a row or multi-row helicla flute (1).
4. the annular seal assembly according to claim 1 that can effectively improve rotor dynamic behavior, it is characterised in that described
The row of multi-detector groove (1) is relevant with the flute length of helicla flute (1), and the flute length of helicla flute (1) is shorter, multi-detector groove (1)
Row is more.
5. the annular seal assembly that can effectively improve rotor dynamic behavior according to Claims 2 or 3 any one, it is special
Sign is that the section groove profile of circumference labyrinth groove (2) is trapezoidal.
6. the annular seal assembly that can effectively improve rotor dynamic behavior according to Claims 2 or 3 any one, it is special
Sign is that the section groove profile of circumference labyrinth groove (2) is rectangle.
7. the annular seal assembly that can effectively improve rotor dynamic behavior according to claim 5 or 6, it is characterised in that
The groove width of the circumferential groove compares γ1=0.05~0.1, slot number n=3~7, groove depth compares h2=0.2~1.
8. according to the annular seal assembly that can effectively improve rotor dynamic behavior described in claim 1-4 any one, it is special
Sign is that the groove width weir of the helicla flute (1) is wide to compare γ1=0.3~0.8, flute length compares β1=0.2~0.4, slot number Ng=6~20
Even number is taken, groove depth compares h1=0.2~1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137112.1A CN107830179A (en) | 2017-11-16 | 2017-11-16 | A kind of annular seal assembly that can effectively improve rotor dynamic behavior |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137112.1A CN107830179A (en) | 2017-11-16 | 2017-11-16 | A kind of annular seal assembly that can effectively improve rotor dynamic behavior |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107830179A true CN107830179A (en) | 2018-03-23 |
Family
ID=61651741
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711137112.1A Pending CN107830179A (en) | 2017-11-16 | 2017-11-16 | A kind of annular seal assembly that can effectively improve rotor dynamic behavior |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107830179A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985373A (en) * | 2019-11-22 | 2020-04-10 | 中国航发西安动力控制科技有限公司 | Servo labyrinth seal structure |
| CN113107896A (en) * | 2021-05-08 | 2021-07-13 | 唐山市环保机械工程有限公司 | Nondestructive efficient sealing device and method for centrifugal blower or centrifugal compressor |
| JP2021127812A (en) * | 2020-02-14 | 2021-09-02 | 株式会社荏原製作所 | Shaft seal device and rotary machine |
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| CN110985373A (en) * | 2019-11-22 | 2020-04-10 | 中国航发西安动力控制科技有限公司 | Servo labyrinth seal structure |
| JP2021127812A (en) * | 2020-02-14 | 2021-09-02 | 株式会社荏原製作所 | Shaft seal device and rotary machine |
| CN113107896A (en) * | 2021-05-08 | 2021-07-13 | 唐山市环保机械工程有限公司 | Nondestructive efficient sealing device and method for centrifugal blower or centrifugal compressor |
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