CN110645355A - Flow guide type combined labyrinth sealing device - Google Patents
Flow guide type combined labyrinth sealing device Download PDFInfo
- Publication number
- CN110645355A CN110645355A CN201910787892.7A CN201910787892A CN110645355A CN 110645355 A CN110645355 A CN 110645355A CN 201910787892 A CN201910787892 A CN 201910787892A CN 110645355 A CN110645355 A CN 110645355A
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- CN
- China
- Prior art keywords
- ring
- labyrinth
- sealing
- rotating shaft
- static
- 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.)
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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
- F16J15/002—Sealings comprising at least two sealings in succession
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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
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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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
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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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
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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
Abstract
The invention provides a flow guide type combined labyrinth sealing device, which consists of a movable ring, a static ring and an opening oil seal, wherein the movable ring is of a split structure, more than two groups of labyrinth toothed rings are arranged on one side of the outer circumference of the movable ring close to a sealing cavity along the radial direction, the static ring is of a split structure and is fixedly connected through bolts, one end of the static ring is fixedly connected with an end cover, more than two groups of labyrinth toothed rings are arranged on one side of the inner circumference of the static ring close to the sealing cavity along the radial direction, and the labyrinth toothed rings on the static ring and the labyrinth toothed rings on the movable ring are alternately inserted to form a zigzag sealing channel together; the opening oil seal is positioned between the movable ring and the static ring. The bottom of the labyrinth toothed ring in the static ring is provided with an oil return hole which is axially communicated, and the bottom of the static ring is provided with a flow guide hole which is radially communicated. The device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the box, and its simple structure, simple to operate, easy to maintain, life are permanent.
Description
Technical Field
The invention provides a sealing device, in particular provides a sealing device for sealing a rotating shaft in the rotating shaft, and belongs to the technical field of mechanical sealing.
Background
The labyrinth seal is a device which is provided with a plurality of annular seal teeth arranged in sequence around a rotating shaft, a series of cut-off gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when the sealed medium passes through the gaps of the zigzag labyrinth. The labyrinth seal has no solid contact because of the clearance between the rotor and the casing, and allows thermal expansion, so that the labyrinth seal is suitable for occasions of high temperature, high pressure and high rotating speed frequency, and is widely used for sealing shaft ends and stages of steam turbines, gas turbines, compressors and blowers.
In some occasions with strict use requirements, the sealing device not only needs to achieve zero leakage of lubricating oil in the sealing cavity, but also needs to achieve the purpose of preventing external pollutants from entering the sealing cavity, and in addition, the sealing device also has higher requirements on the service life of the sealing element.
The sealing devices in the prior art are more in variety, complicated or simple in structure, and different in sealing performance. In general, however, it would be desirable to provide a seal assembly that is simple in construction, has good sealing properties, and has a long useful life.
Disclosure of Invention
The invention provides a flow guide type combined labyrinth sealing device which can well seal a cavity containing lubricating grease between a rotating shaft and a box body, and has the advantages of simple structure, convenience in installation, easiness in maintenance and long service life.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
a flow guiding type combined labyrinth seal device is arranged between a rotating shaft and an end cover, the rotating shaft is arranged in the end cover and extends out of the end cover, a gap between the inner part of the end cover and the rotating shaft is a seal cavity, the flow guiding type combined labyrinth seal device is composed of a movable ring, a static ring and an opening oil seal, the movable ring is of a split structure, the movable ring is sleeved on the rotating shaft and is fixedly locked on the rotating shaft through bolt connection, more than two groups of labyrinth toothed rings are arranged on one side of the outer circumference of the movable ring close to the seal cavity along the radial direction,
the static ring is of a split structure and is fixedly connected through bolts, one end of the static ring is fixedly connected with the end cover, more than two groups of labyrinth toothed rings are arranged on one side of the inner circumference of the static ring close to the sealing cavity along the radial direction, and the labyrinth toothed rings on the static ring and the labyrinth toothed rings on the dynamic ring are inserted in a staggered manner to form a tortuous sealing channel together;
the opening oil seal is positioned between the movable ring and the static ring and positioned on one side close to the outside, the cross section of the opening oil seal is in a claw shape and comprises a connecting ring arranged along the axial direction, a first sealing lip and a second sealing lip which are obliquely arranged towards one side of the sealing cavity and a dust-proof lip which is obliquely arranged towards one side of the outside, the connecting ring, the first sealing lip and the second sealing lip are of an integrated structure, the connecting ring is fixedly arranged inside the static ring through interference fit, a framework made of metal materials is arranged inside the connecting ring, the framework is provided with a plug pin and slot structure matched with each other at the opening, and the inner circumferences of the first sealing lip and the second sealing lip are in contact sealing;
the bottom of the labyrinth toothed ring in the static ring is provided with an oil return hole which is axially communicated, the bottom of the static ring is provided with a guide hole which is radially communicated, the position of the guide hole is positioned between the opening oil seal and the labyrinth toothed ring, and the outlet of the guide hole is connected with a guide pipe.
An annular mounting groove is formed in the inner circumference of the movable ring, and a sealing ring for sealing between the movable ring and the rotating shaft is arranged in the mounting groove.
The first spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the first sealing lip and expands towards the direction of the rotating shaft, and the first sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece.
The second spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the second sealing lip and expands towards the direction of the rotating shaft, and the second sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the second spring piece.
Compared with the prior art, the flow guide type combined labyrinth sealing device provided by the invention has the following advantages: 1. the invention has simple structure, and skillfully combines the opening oil seal and the labyrinth seal, thereby realizing excellent sealing effect. 2. According to the invention, the movable ring and the static ring are of split structures, the split structures are connected and fixed through bolts, and meanwhile, the whole opening oil seal can be of an opening structure, so that the whole equipment is convenient to install and maintain. 3. According to the invention, the spring piece is embedded in the sealing lip, so that the sealing lip is always kept in a close-fitting state, and even if the sealing lip is worn after long-time use, the first sealing lip/the second sealing lip can be always in close contact with the moving ring due to the expansion elasticity of the spring piece, thereby ensuring the sealing effect. 4. The static ring is provided with an axially through oil return hole and a radially through flow guide hole, and the outlet of the flow guide hole is connected with a flow guide pipe, so that when lubricating grease in the sealing cavity is excessive, the lubricating grease can flow out along the flow guide hole and flow into the oil tank through the flow guide pipe.
Drawings
Fig. 1 is a schematic view of the overall structure of a flow-guiding type combined labyrinth sealing device provided by the invention;
in the figure: the structure comprises the following components, by weight, 1-an end cover, 2-a rotating shaft, 3-a sealing cavity, 4-a connecting ring, 5-a first sealing lip, 6-a second sealing lip, 7-a dustproof lip, 8-a first spring piece, 9-a second spring piece, 10-a framework, 11-a plug pin, 12-a movable ring, 13-a fixed ring, 14-a bolt, 15-a labyrinth toothed ring, 16-a sealing ring, 17-an oil return hole and 18-a flow guide hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The whole structure of the flow-guiding type combined labyrinth sealing device provided by the invention is shown in figure 1, the flow-guiding type combined labyrinth sealing device is arranged between a rotating shaft 2 and an end cover 1, the rotating shaft is arranged in the end cover and extends out of the end cover, a gap between the inner part of the end cover and the rotating shaft is a sealing cavity 3, the flow-guiding type combined labyrinth sealing device is composed of a movable ring 12, a fixed ring 13 and an opening oil seal, the movable ring is of a split structure, the movable ring is sleeved on the rotating shaft and is fixedly connected on the rotating shaft through a bolt 14, an annular mounting groove is arranged on the inner circumference of the movable ring, and a sealing ring 16 for sealing the space between the movable ring and the. More than two groups of labyrinth toothed rings 15 are arranged on one side of the outer circumference of the rotating ring close to the sealing cavity along the radial direction.
The stationary ring 13 is a split structure and is fixed by bolts, and one end of the stationary ring is fixed by the end cover. More than two groups of labyrinth toothed rings 15 are arranged on one side of the inner circumference of the static ring close to the sealing cavity along the radial direction, and the labyrinth toothed rings on the static ring and the labyrinth toothed rings on the dynamic ring are alternately inserted to form a zigzag sealing channel together. The bottom of the labyrinth toothed ring in the static ring is provided with an oil return hole 17 which is axially communicated, the bottom of the static ring is provided with a guide hole 18 which is radially communicated, the position of the guide hole is positioned between the opening oil seal and the labyrinth toothed ring, and the outlet of the guide hole is connected with a guide pipe.
The opening oil blanket is located between rotating ring and the quiet ring, and is located the one side that is close to the external world, and opening oil blanket cross-section is "claw" style of calligraphy, includes go-between 4 and the first seal lip 5, the second seal lip 6 that set up towards seal chamber lopsidedness along the axial setting and the dustproof lip 7 that sets up towards external lopsidedness, four formula structures as an organic whole, and wherein the go-between is fixed in the inside of quiet ring through interference fit installation, the inside of go-between is provided with metal material's skeleton 10, and the skeleton sets up assorted bolt 11 and slot structure at the opening part. The inner circumferences of the first sealing lip and the second sealing lip are in contact sealing with the movable ring. The first seal lip is provided with a first spring piece 8, the first spring piece is annular as a whole, the section of the first spring piece is V-shaped, the first spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the first seal lip and expands towards the direction of the rotating shaft, and the first seal lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece. The second spring piece 9 is arranged on the second sealing lip, the whole second spring piece is annular, the section of the second spring piece is V-shaped, the second spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the second sealing lip and expands towards the direction of the rotating shaft, and the second sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the second spring piece.
Claims (4)
1. The utility model provides a water conservancy diversion type combination labyrinth seal device, installs between axis of rotation and end cover, the axis of rotation is installed in the end cover and is stretched out from the end cover, and the space between the inside and axis of rotation of end cover is sealed chamber, its characterized in that: the diversion type combined labyrinth sealing device consists of a movable ring, a stationary ring and an opening oil seal, wherein the movable ring is of a split structure, the movable ring is sleeved on the rotating shaft and is fixedly locked on the rotating shaft through bolt connection, more than two groups of labyrinth toothed rings are arranged on one side of the outer circumference of the movable ring close to the sealing cavity along the radial direction,
the static ring is of a split structure and is fixedly connected through bolts, one end of the static ring is fixedly connected with the end cover, more than two groups of labyrinth toothed rings are arranged on one side of the inner circumference of the static ring close to the sealing cavity along the radial direction, and the labyrinth toothed rings on the static ring and the labyrinth toothed rings on the dynamic ring are inserted in a staggered manner to form a tortuous sealing channel together;
the opening oil seal is positioned between the movable ring and the static ring and positioned on one side close to the outside, the cross section of the opening oil seal is in a claw shape and comprises a connecting ring arranged along the axial direction, a first sealing lip and a second sealing lip which are obliquely arranged towards one side of the sealing cavity and a dust-proof lip which is obliquely arranged towards one side of the outside, the connecting ring, the first sealing lip and the second sealing lip are of an integrated structure, the connecting ring is fixedly arranged inside the static ring through interference fit, a framework made of metal materials is arranged inside the connecting ring, the framework is provided with a plug pin and slot structure matched with each other at the opening, and the inner circumferences of the first sealing lip and the second sealing lip are in contact sealing;
the bottom of the labyrinth toothed ring in the static ring is provided with an oil return hole which is axially communicated, the bottom of the static ring is provided with a guide hole which is radially communicated, the position of the guide hole is positioned between the opening oil seal and the labyrinth toothed ring, and the outlet of the guide hole is connected with a guide pipe.
2. The flow-directing type composite labyrinth sealing device as claimed in claim 1, wherein: an annular mounting groove is formed in the inner circumference of the movable ring, and a sealing ring for sealing between the movable ring and the rotating shaft is arranged in the mounting groove.
3. The flow-directing type composite labyrinth sealing device as claimed in claim 1, wherein: the first spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the first sealing lip and expands towards the direction of the rotating shaft, and the first sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece.
4. The flow-directing type composite labyrinth sealing device as claimed in claim 1, wherein: the second spring piece is arranged along the inner circumference of the connecting ring and the outer circumference of the second sealing lip and expands towards the direction of the rotating shaft, and the second sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the second spring piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787892.7A CN110645355B (en) | 2019-08-26 | 2019-08-26 | Flow guide type combined labyrinth sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787892.7A CN110645355B (en) | 2019-08-26 | 2019-08-26 | Flow guide type combined labyrinth sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645355A true CN110645355A (en) | 2020-01-03 |
| CN110645355B CN110645355B (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910787892.7A Active CN110645355B (en) | 2019-08-26 | 2019-08-26 | Flow guide type combined labyrinth sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110645355B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009078174A1 (en) * | 2007-12-19 | 2009-06-25 | Ntn Corporation | Bearing device for wheel |
| CN202469002U (en) * | 2012-03-02 | 2012-10-03 | 邓伦胜 | Split framework oil seal |
| CN205371626U (en) * | 2015-09-30 | 2016-07-06 | 武汉新置密封科技有限公司 | Two subdivision formula sealing device |
| CN206257278U (en) * | 2016-10-20 | 2017-06-16 | 刘丽霞 | A kind of row's fat main shaft sealing device certainly |
| US10030777B2 (en) * | 2016-04-11 | 2018-07-24 | Prippell Technologies, Llc | Dynamic fluid seal |
| CN208185249U (en) * | 2017-12-25 | 2018-12-04 | 浙江新昌振新密封件有限公司 | A kind of four lip seal anti-dust seals |
| US20180347704A1 (en) * | 2016-04-11 | 2018-12-06 | Prippell Technologies, Llc | Dynamic fluid seal |
| CN208519180U (en) * | 2018-07-06 | 2019-02-19 | 自贡力尔机械科技有限公司 | Contactless multistage combined sealing |
-
2019
- 2019-08-26 CN CN201910787892.7A patent/CN110645355B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009078174A1 (en) * | 2007-12-19 | 2009-06-25 | Ntn Corporation | Bearing device for wheel |
| CN202469002U (en) * | 2012-03-02 | 2012-10-03 | 邓伦胜 | Split framework oil seal |
| CN205371626U (en) * | 2015-09-30 | 2016-07-06 | 武汉新置密封科技有限公司 | Two subdivision formula sealing device |
| US10030777B2 (en) * | 2016-04-11 | 2018-07-24 | Prippell Technologies, Llc | Dynamic fluid seal |
| US20180347704A1 (en) * | 2016-04-11 | 2018-12-06 | Prippell Technologies, Llc | Dynamic fluid seal |
| CN206257278U (en) * | 2016-10-20 | 2017-06-16 | 刘丽霞 | A kind of row's fat main shaft sealing device certainly |
| CN208185249U (en) * | 2017-12-25 | 2018-12-04 | 浙江新昌振新密封件有限公司 | A kind of four lip seal anti-dust seals |
| CN208519180U (en) * | 2018-07-06 | 2019-02-19 | 自贡力尔机械科技有限公司 | Contactless multistage combined sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110645355B (en) | 2022-01-18 |
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