CN110513154A - Chamber is in the pouch-type damping seal structure of circumferential divergence expression - Google Patents
Chamber is in the pouch-type damping seal structure of circumferential divergence expression Download PDFInfo
- Publication number
- CN110513154A CN110513154A CN201910772242.5A CN201910772242A CN110513154A CN 110513154 A CN110513154 A CN 110513154A CN 201910772242 A CN201910772242 A CN 201910772242A CN 110513154 A CN110513154 A CN 110513154A
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- Prior art keywords
- chamber
- pouch
- circumferential
- type
- type damping
- 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 25
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
-
- 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
- F01D25/04—Antivibration arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses the pouch-type damping seal structures that a kind of chamber is in circumferential divergence expression, it include: stator, sealing tooth and circumferential baffle, wherein, stator is divided into multiple alternately arranged basic chambers and two secondary chambers by sealing tooth along axial direction, circumferential baffle is multiple, through basic chamber and two secondary chambers and being provided at circumferentially spaced along each chamber, to form multiple pouch-type chambers, along the rotation direction of rotor, the distance of central axis of the upper top surface of each pouch-type chamber to stator uniformly increases, and forms the wedge gap structure circumferentially dissipated.The chamber is in the pouch-type damping seal structure of circumferential divergence expression, structurally reasonable, convenient for design, can inhibit sealing Airflow Exciting-Vibration Force, improves the rotor system stability of pouch-type damping seal.
Description
Technical field
The present invention relates to rotating machinery dynamic sealing field, the pouch-type damping that a kind of chamber is in circumferential divergence expression is specifically provided
Sealing structure.
Background technique
Sealing is the critical component of the rotating machineries such as steam turbine, compressor, aero-engine, plays reduction working media and lets out
Leakage and energy-saving effect.In recent years, with the continuous improvement of rotating machinery working media parameter, reduction rotation has been sealed in it
While mechanical leaks amount, biggish Airflow Exciting-Vibration Force can be also generated, after medium parameter improves, seals gas caused by interior air-flow
Stream power on rotor oscillation influence be more and more obvious, sealing flow-induced vibration have become high parameter rotary machine rotor unstability it is important because
Element.
For reduce seal Airflow Exciting-Vibration Force, improve the stability of sealing, researchers on the basis of traditional labyrinth seal,
Propose by changing stator surface roughness and sealing structure change dynamic characteristics honeycomb, pass and pouch-type damp it is close
Envelope；Inhibit the anti-cyclone sealed and resistance rotation grid sealing of Airflow Exciting-Vibration Force by reducing circumferential flow velocity；By reducing hydrodynamic
Effect seals the negative dislocation sealing structure of stability to improve.Although the sealing structure inhibiting mechanism of above-mentioned form is not quite similar,
But its essence belongs to fixed sealing structure.Wherein, pouch-type damping seal is flowed for traditional labyrinth seal inner circumferential
More strongly, it is also easy to produce flow induced vibrations problem and develops, main purpose is to solve Turbomachine Rotor system vibration unstability
Problem.Therefore, in the development process of pouch-type damping seal technology, the research of rotor dynamic behavior has obtained great attention.
Different from labyrinth seal, in perforation baffle pouch-type damping seal structure, penetrate through the circumferential baffle of baffle pouch-type damping seal from
The import of sealing has passed through all sealed chambers to outlet, and all sealed chambers are the segmental arcs pouch-type chamber such as circumferentially isolated
Room has been alternately arranged basic chamber and two secondary chambers along axial direction.Studies have shown that pouch-type damping is close compared with traditional labyrinth seal
The circumferential partition of envelope reduces the circumferential speed of seal chamber interior air-flow, has biggish damped coefficient, so that rotor-support-foundation system is steady
It is qualitative to be enhanced.
However, rotor certainly exists eccentric state in rotating machinery operational process, rotor under the conditions of eccentric rotary,
Not only sealing device is prone to wear failure, but also the differential pressure difference formed in seal clearance by hydrodynamic effect can generate
Airflow Exciting-Vibration Force causes flow-induced vibration problem that cannot solve at all, and the stability of pouch-type sealing reduces, and rotor is easy to cause to lose
Surely.
Therefore, the stability for how further increasing pouch-type damping seal rotor-support-foundation system, becomes that people are urgently to be resolved to be asked
Topic.
Summary of the invention
In consideration of it, the purpose of the present invention is to provide the pouch-type damping seal structure that a kind of chamber is in circumferential divergence expression, with
Further increase the rotor stability of pouch-type damping seal.
Present invention provide the technical scheme that chamber is in the pouch-type damping seal structure of circumferential divergence expression, comprising: stator,
Seal tooth and circumferential baffle, wherein stator is divided into multiple alternately arranged basic chambers and secondary chamber by sealing tooth along axial direction
Room, circumferential baffle be it is multiple, through basic chamber and two secondary chambers and being provided at circumferentially spaced along each chamber, to form multiple bags
Type chamber, along the rotation direction of rotor, the distance of central axis of the upper top surface of each pouch-type chamber to stator uniformly increases, and is formed
The wedge gap structure circumferentially dissipated.
It is preferred that the axial baffle is 4~12, and it is uniformly distributed along the circumferential direction of basic chamber and two secondary chambers.
Further preferably, the width of the basic chamber is greater than the width of two secondary chambers.
Chamber provided by the invention is in that each chamber is designed to week by the pouch-type damping seal structure of circumferential divergence expression
To the wedge gap structure of diverging, so that gas leakage flows to wide arc gap from small―gap suture along the circumferential of rotor, to not have shape
At the condition of hydrodynamic effect, and then the formation of Airflow Exciting-Vibration Force can be effectively suppressed, so that the stability of rotor-support-foundation system enhances.
Chamber provided by the invention is in the pouch-type damping seal structure of circumferential divergence expression, and structure is simple, convenient for design, relatively
It in existing pouch-type damping seal structure, is not required to increase any part, it is only necessary to change the shape of pouch-type sealed chamber, can obviously mention
The sealing performance of high pouch-type damping seal, reduces use cost, and the chamber design of circumferential divergence form makes it be unsatisfactory for hydrodynamic
The formation condition of effect improves the stability of rotor-support-foundation system.
Detailed description of the invention
With reference to the accompanying drawing and embodiment the present invention is described in further detail:
Fig. 1 is structural schematic diagram of the chamber provided by the invention in the pouch-type damping seal structure of circumferential divergence expression；
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Specific embodiment
The present invention is further explained below in conjunction with specific embodiment, but the not limitation present invention.
As shown in Figure 1 and Figure 2, the present invention provides the pouch-type damping seal structure that a kind of chamber is in circumferential divergence expression, packets
It includes: stator 1, sealing tooth 2 and circumferential baffle 3, wherein stator 1 is divided into along axial direction by sealing tooth 2 multiple alternately arranged basic
Chamber 11 and two secondary chambers 12, it is preferable that the width of the basic chamber 11 is greater than the width of two secondary chambers 12, and circumferential baffle 3 is
It is multiple, through basic chamber 11 and two secondary chambers 12 and being provided at circumferentially spaced along each chamber, to form multiple pouch-type chambers, edge
The distance of the rotation direction of rotor 4, central axis of the upper top surface of each pouch-type chamber to stator 1 uniformly increases, and forms circumferential hair
Scattered wedge gap structure, it is preferable that the axial baffle 3 is 4~12, and along the circumferential direction of basic chamber 11 and two secondary chambers 12
It is uniformly distributed.
The chamber is in the pouch-type damping seal structure of circumferential divergence expression, and during rotor rotation, pouch-type chamber is indoor
Gas leakage will flow to wide arc gap from small―gap suture along the circumferential of rotor, and the formation condition of hydrodynamic effect is: 1, two work
There must be wedge gap between face；2, viscous fluid must be continuously-filled between two working faces；3, must have between two working faces relatively sliding
Dynamic speed, and the direction of motion must be such that fluid flows into from big section, small bore outflow, it follows that the wedge shape circumferentially dissipated
Gap is unsatisfactory for the formation condition of hydrodynamic effect, can effectively inhibit the flow-induced vibration formed by hydrodynamic effect
Power improves the stability of rotor during operation.
A specific embodiment of the invention is write according to progressive mode, and each embodiment is highlighted
Difference, similar portion can be with cross-reference.
Embodiments of the present invention are elaborated above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (3)
1. the pouch-type damping seal structure that chamber is in circumferential divergence expression characterized by comprising stator (1), sealing tooth (2) and
Circumferential baffle (3), wherein stator (1) is divided into multiple alternately arranged basic chambers (11) and two by sealing tooth (2) along axial direction
Secondary chamber (12), circumferential baffle (3) be it is multiple, through basic chamber (11) and two secondary chambers (12) and between the circumferential direction of each chamber
Every setting, to form multiple pouch-type chambers, rotation direction along rotor (4), the upper top surface of each pouch-type chamber to stator (1)
The distance of central axis uniformly increases, and forms the wedge gap structure circumferentially dissipated.
2. the pouch-type damping seal structure that chamber described in accordance with the claim 1 is in circumferential divergence expression, it is characterised in that: the axis
It is 4~12 to baffle (3), and is uniformly distributed along the circumferential direction of basic chamber (11) and two secondary chambers (12).
3. the pouch-type damping seal structure that chamber described in accordance with the claim 1 is in circumferential divergence expression, it is characterised in that: the base
The width of this chamber (11) is greater than the width of two secondary chambers (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772242.5A CN110513154A (en) | 2019-08-21 | 2019-08-21 | Chamber is in the pouch-type damping seal structure of circumferential divergence expression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772242.5A CN110513154A (en) | 2019-08-21 | 2019-08-21 | Chamber is in the pouch-type damping seal structure of circumferential divergence expression |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513154A true CN110513154A (en) | 2019-11-29 |
Family
ID=68625934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910772242.5A Pending CN110513154A (en) | 2019-08-21 | 2019-08-21 | Chamber is in the pouch-type damping seal structure of circumferential divergence expression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513154A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397416A (en) * | 2018-02-24 | 2018-08-14 | 西安交通大学 | A kind of non-homogeneous controllable chamber rotary seal structure |
| CN109322710A (en) * | 2018-10-22 | 2019-02-12 | 哈尔滨工程大学 | A kind of inclined ellipse pocket sealing structure adapting to rotor eddy |
| CN210738623U (en) * | 2019-08-21 | 2020-06-12 | 沈阳航空航天大学 | Bag type damping sealing structure with circumferentially-divergent cavity |
-
2019
- 2019-08-21 CN CN201910772242.5A patent/CN110513154A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397416A (en) * | 2018-02-24 | 2018-08-14 | 西安交通大学 | A kind of non-homogeneous controllable chamber rotary seal structure |
| CN109322710A (en) * | 2018-10-22 | 2019-02-12 | 哈尔滨工程大学 | A kind of inclined ellipse pocket sealing structure adapting to rotor eddy |
| CN210738623U (en) * | 2019-08-21 | 2020-06-12 | 沈阳航空航天大学 | Bag type damping sealing structure with circumferentially-divergent cavity |
Non-Patent Citations (2)
| Title |
|---|
| 孙丹，李胜远，艾延廷，周海仑，王志: "袋型阻尼密封动力特性分析及对转子稳定性的影响", 中国电机工程学报, vol. 38, no. 12, 20 June 2018 (2018-06-20), pages 3621 * |
| 孙丹，肖忠会，王学军，郑铁生，孟继纲: "负错位密封流动特性研究", 中国电机工程学报, vol. 35, no. 12, 20 June 2015 (2015-06-20), pages 3068 * |
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