CN104879500A - High and low tooth labyrinth sealing structure - Google Patents
High and low tooth labyrinth sealing structure Download PDFInfo
- Publication number
- CN104879500A CN104879500A CN201510266469.4A CN201510266469A CN104879500A CN 104879500 A CN104879500 A CN 104879500A CN 201510266469 A CN201510266469 A CN 201510266469A CN 104879500 A CN104879500 A CN 104879500A
- Authority
- CN
- China
- Prior art keywords
- sealing
- tooth
- short
- rotatable parts
- rotating part
- 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
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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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
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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
- F16J15/16—Sealings between relatively-moving surfaces
Landscapes
- 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 relates to a high and low tooth labyrinth sealing structure and belongs to the technical field of mechanical equipment. The high and low tooth labyrinth sealing structure is composed of a static part and a rotating part, wherein long sealing teeth and short sealing teeth are machined in the static part, an annular step is machined on the rotating part and corresponds to the short sealing teeth, a fluid channel is formed between the long sealing teeth and the annular step as well as between the short sealing teeth and the annular step, and an annular protrusion is machined on the rotating part. According to the high and low tooth labyrinth sealing structure, the annular protrusion is additionally arranged on the rotating part participating in sealing, the leakage amount obtained in the axial displacement of the rotating part can be smaller, and with the embodiment of a second attached map as an example, the leakage amount can be reduced by 20% through experimental measurement.
Description
Technical field
The present invention relates to a kind of stepped labyrinth sealing configuration, need the position of sealing for rotating machinery, especially the shaft end seal of turbomachinery, belongs to mechanical equipment technical field.
Background technique
At present, known stepped labyrinth sealing configuration is made up of the static part and rotatable parts with the level being with sealing tooth, the arrangement of sealing tooth is generally between two long teeth containing two short teeth, as shown in Figure 1, by in the fluid-encapsulated process leaking, can be stopped by the inner complicated geometrical construction of sealing configuration, damming that mainly seal clearance sealed between tooth and rotatable parts produces acts on and seals the barrier effect of tooth to leakage flow, thus produces the effect of sealing.When actual machine is run, due to the reason of the aspect such as thermal effect and mechanical vibration, can axial motion be there is in rotatable parts, this just causes two short teeth can not produce seal action simultaneously, as shown in Figure 1, the short tooth on right side does not form seal clearance with rotatable parts, can not form barrier effect to flowing yet, namely create the waste of short tooth, this problem is unfavorable for sealing effect.
Summary of the invention
The object of the invention is to propose a kind of stepped labyrinth sealing configuration, existing stepped labyrinth sealing configuration is improved, make its structure can in the process of rotatable parts axial motion, utilize short tooth more fully, portion eliminates short tooth waste problem, portion can improve the seal action of short tooth, thus improves sealability.
The stepped labyrinth sealing configuration that the present invention proposes, this stepped labyrinth sealing configuration is made up of static part and rotatable parts, described static part is processed with long sealing tooth and short sealing tooth, described rotatable parts are processed with ring-shaped step, ring-shaped step is relative with short sealing tooth, length seals tooth and forms fluid passage between short sealing tooth and ring-shaped step, and rotatable parts are processed with annular protrusion.
The stepped labyrinth sealing configuration that the present invention proposes, the rotatable parts participating in sealing add annular protrusion, less leakage rate can be obtained in the axial motion process of rotatable parts, the such as embodiment of accompanying drawing 2, measure by experiment, leakage rate can be reduced about 20%.
Accompanying drawing explanation
Fig. 1 is existing stepped labyrinth sealed structural representation.
Fig. 2 is the schematic diagram of the stepped labyrinth sealing configuration that the present invention proposes.
In Fig. 1 and Fig. 2,1 is static part, and 2 is long sealing teeth, and 3 is short sealing teeth, and 4 is rotatable parts, and 5 is ring-shaped steps, and 6 is annular protrusions.
Embodiment
The stepped labyrinth sealing configuration that the present invention proposes, as shown in Figure 2, this stepped labyrinth sealing configuration is made up of static part 1 and rotatable parts 4 its structure.Static part 1 is processed with long sealing tooth 2 and short sealing tooth 3, rotatable parts 4 are processed with ring-shaped step 5, ring-shaped step 5 is relative with short sealing tooth 3, and length seals tooth 2 and forms fluid passage between short sealing tooth 3 and ring-shaped step 5, rotatable parts 4 is processed with annular protrusion 6.
In stepped labyrinth sealing configuration of the present invention, the position of annular protrusion 6 can in any position participating in the rotatable parts 4 sealed, annular protrusion 6 can be processed one or more, to Figure 2 shows that on the ring-shaped step of rotatable parts 4 and respectively machined under step the schematic diagram of the embodiment of an annular protrusion 6, annular protrusion 6 can be added in other positions on the rotatable parts participating in sealing.The limited height system of annular protrusion 6, can not be greater than the size of seal clearance between sealing tooth and rotatable parts, in case come in contact collision between annular protrusion 6 and sealing tooth, the height of annular protrusion 6 is higher, and sealing effect will be better.Annular protrusion 6 not only self can play the effect stopping leak fluid, also can change the flow trace of leak fluid simultaneously, thus the phenomenon eliminating the waste of short tooth can be realized, annular protrusion 6 will leak main flow to be stopped, leakage main flow is struck on next short tooth under the effect of little tooth, thus avoids the waste of next short tooth.
Claims (1)
1. a stepped labyrinth sealing configuration, this stepped labyrinth sealing configuration is made up of static part and rotatable parts, described static part is processed with long sealing tooth and short sealing tooth, described rotatable parts are processed with ring-shaped step, ring-shaped step is relative with short sealing tooth, length seals tooth and forms fluid passage between short sealing tooth and ring-shaped step, it is characterized in that described rotatable parts are processed with annular protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510266469.4A CN104879500A (en) | 2015-05-22 | 2015-05-22 | High and low tooth labyrinth sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510266469.4A CN104879500A (en) | 2015-05-22 | 2015-05-22 | High and low tooth labyrinth sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104879500A true CN104879500A (en) | 2015-09-02 |
Family
ID=53947110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510266469.4A Pending CN104879500A (en) | 2015-05-22 | 2015-05-22 | High and low tooth labyrinth sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104879500A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606344A (en) * | 2021-07-30 | 2021-11-05 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0979962A2 (en) * | 1998-08-10 | 2000-02-16 | General Electric Company | Seal assembly and rotary machine containing such seal assembly |
| EP1164320A2 (en) * | 2000-06-16 | 2001-12-19 | General Electric Company | Multi-clearance labyrinth seal design and related process |
| CN1396993A (en) * | 2000-04-06 | 2003-02-12 | 涡轮保护股份有限公司 | Improved brush-seal designs for turbines and smilar rotary apparatus |
| CN101078440A (en) * | 2006-05-25 | 2007-11-28 | 通用电气公司 | Method and apparatus for variable clearance packing |
| CN202851091U (en) * | 2012-09-26 | 2013-04-03 | 上海交通大学 | Tooth top clearance local resistance-increasing seal tooth type structure |
-
2015
- 2015-05-22 CN CN201510266469.4A patent/CN104879500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0979962A2 (en) * | 1998-08-10 | 2000-02-16 | General Electric Company | Seal assembly and rotary machine containing such seal assembly |
| CN1396993A (en) * | 2000-04-06 | 2003-02-12 | 涡轮保护股份有限公司 | Improved brush-seal designs for turbines and smilar rotary apparatus |
| EP1164320A2 (en) * | 2000-06-16 | 2001-12-19 | General Electric Company | Multi-clearance labyrinth seal design and related process |
| CN101078440A (en) * | 2006-05-25 | 2007-11-28 | 通用电气公司 | Method and apparatus for variable clearance packing |
| CN202851091U (en) * | 2012-09-26 | 2013-04-03 | 上海交通大学 | Tooth top clearance local resistance-increasing seal tooth type structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606344A (en) * | 2021-07-30 | 2021-11-05 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
| CN113606344B (en) * | 2021-07-30 | 2022-12-09 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |
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| WD01 | Invention patent application deemed withdrawn after publication |