CN110594414A - Axial multi-lip labyrinth seal device for rotating shaft - Google Patents
Axial multi-lip labyrinth seal device for rotating shaft Download PDFInfo
- Publication number
- CN110594414A CN110594414A CN201910787913.5A CN201910787913A CN110594414A CN 110594414 A CN110594414 A CN 110594414A CN 201910787913 A CN201910787913 A CN 201910787913A CN 110594414 A CN110594414 A CN 110594414A
- Authority
- CN
- China
- Prior art keywords
- ring
- sealing
- static
- rotating shaft
- static ring
- 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
-
- 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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
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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 an axial multi-lip labyrinth sealing device for a rotating shaft, which consists of a moving ring and a static ring, wherein the section of the static ring is E-shaped and consists of an inner static ring, a middle static ring, an outer static ring and a static connecting ring which is arranged in the axial direction and in the radial direction, and the outer static ring is positioned in an end cover and is fixed with the end cover through interference fit; the section of the movable ring is in a reverse E shape and consists of a main ring, an inner sealing ring, an outer sealing ring and a movable connecting ring which are arranged in the radial direction, wherein a framework with a reverse E-shaped section is arranged in the movable ring; the main ring is sleeved on the rotating shaft and fixed with the rotating shaft through interference fit, and sealing lips with X-shaped cross sections are arranged at the left ends of the inner sealing ring and the outer sealing ring. 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 an axial multi-lip labyrinth sealing device for a rotating shaft, which can better seal a cavity containing lubricating grease between the 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:
an axial multi-lip labyrinth seal device for a rotating shaft is arranged between the 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 inside of the end cover and the rotating shaft is a seal cavity, the axial multi-lip labyrinth seal device for the rotating shaft is composed of a movable ring and a static ring, the section of the static ring is E-shaped and composed of an inner static ring, a middle static ring, an outer static ring and a static connecting ring which is arranged in the radial direction, the outer static ring is positioned in the end cover and is fixed with the end cover through interference fit;
the section of the movable ring is in a reverse E shape and consists of a main ring, an inner sealing ring, an outer sealing ring and a movable connecting ring which are arranged in the radial direction, wherein a framework with a reverse E-shaped section is arranged in the movable ring; the main ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, and the left ends of the inner sealing ring and the outer sealing ring are provided with sealing lips with X-shaped cross sections; the dynamic ring and the static ring are inserted in a staggered mode, the inner sealing ring in the dynamic ring is located between the inner static ring and the middle static ring in the static ring, the outer sealing ring is located between the middle static ring and the outer static ring in the static ring, and the sealing lips are in close contact with and seal with the inner static ring, the middle static ring and the outer static ring.
And an inclined auxiliary sealing lip is arranged outwards along the radial direction of the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring.
The sealing lip is internally provided with an annular spring piece with a V-shaped section, the spring piece is fixed at the end part of the sealing lip, and the sealing lip is always kept in a close-fitting state with the inner static ring and the outer static ring under the expansion action of the spring piece.
Compared with the prior art, the axial multi-lip labyrinth sealing device for the rotating shaft has the following advantages: 1. the invention has simple structure, and through the penetration and matching between the movable ring and the static ring, the sealing lip arranged on the movable ring is tightly contacted and sealed with the static ring, and the sealing between the auxiliary sealing lip and the static ring is added, thereby realizing good sealing effect. 2. According to the invention, the movable ring and the stationary ring are fixed with the rotating shaft and the end cover in an interference fit manner, so that the installation and maintenance are convenient. 3. According to the invention, the annular spring piece with the V-shaped section is arranged in the sealing lip, the spring piece is fixed at the end part of the sealing lip, the sealing lip is always kept in a close-fitting state with the inner static ring, the middle static ring and the outer static ring under the expansion action of the spring piece, and even if the sealing lip is abraded after long-time use, the sealing lip is tightly attached to the static ring due to the expansion elasticity of the annular spring piece, so that the sealing effect is ensured.
Drawings
FIG. 1 is a schematic overall structure diagram of an axial multi-lip labyrinth seal device for a rotating shaft provided by the invention;
in the figure: 1-end cover, 2-rotating shaft, 3-sealing cavity, 4-inner static ring, 5-outer static ring, 6-static connecting ring, 7-main ring, 8-middle static ring, 9-dynamic connecting ring, 10-framework, 11-sealing lip, 12-auxiliary sealing lip, 13-spring piece, 14-inner sealing ring and 15-outer sealing ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The axial multi-lip labyrinth seal device for the rotating shaft is characterized in that the overall structure is as shown in figure 1, the axial multi-lip labyrinth seal 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 seal cavity 3, the axial multi-lip labyrinth seal device for the rotating shaft consists of a moving ring and a static ring, the cross section of the static ring is E-shaped and consists of an inner static ring 4, a middle static ring 8, an outer static ring 5 and a static connecting ring 6 which is arranged in the axial direction, and the outer static ring is positioned in the end cover and is fixed with the end cover through interference fit;
the section of the movable ring is reverse E-shaped, and the movable ring consists of a main ring 7, an inner sealing ring 14, an outer sealing ring 15 and a movable connecting ring 9 which are arranged in the radial direction, and a framework 10 with a reverse E-shaped section is arranged in the movable ring; the main ring is sleeved on the rotating shaft and fixed with the rotating shaft through interference fit, and the left ends of the inner sealing ring and the outer sealing ring are provided with sealing lips 11 with X-shaped cross sections; the dynamic ring and the static ring are inserted in a staggered mode, the inner sealing ring in the dynamic ring is located between the inner static ring and the middle static ring in the static ring, the outer sealing ring is located between the middle static ring and the outer static ring in the static ring, and the sealing lips are in close contact with and seal with the inner static ring, the middle static ring and the outer static ring. The sealing lip is internally provided with an annular spring piece 13 with a V-shaped section, and the spring piece is fixed at the end part of the sealing lip to ensure that the sealing lip is always kept in a close-fitting state with the inner static ring and the outer static ring. And an inclined auxiliary sealing lip 12 is arranged outwards along the radial direction on the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring.
Claims (3)
1. An axial multi-lip labyrinth seal device for a rotating shaft, which is arranged between the rotating shaft and an end cover, wherein the rotating shaft is arranged in the end cover and extends out of the end cover, and a gap between the inside of the end cover and the rotating shaft is a seal cavity, and is characterized in that: the axial multi-lip labyrinth sealing device for the rotating shaft comprises a moving ring and a static ring, wherein the section of the static ring is E-shaped and comprises an inner static ring, a middle static ring, an outer static ring and a static connecting ring which is arranged in the axial direction and in the radial direction, and the outer static ring is positioned in the end cover and is fixed with the end cover through interference fit;
the section of the movable ring is in a reverse E shape and consists of a main ring, an inner sealing ring, an outer sealing ring and a movable connecting ring which are arranged in the radial direction, wherein a framework with a reverse E-shaped section is arranged in the movable ring; the main ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, and the left ends of the inner sealing ring and the outer sealing ring are provided with sealing lips with X-shaped cross sections; the dynamic ring and the static ring are inserted in a staggered mode, the inner sealing ring in the dynamic ring is located between the inner static ring and the middle static ring in the static ring, the outer sealing ring is located between the middle static ring and the outer static ring in the static ring, and the sealing lips are in close contact with and seal with the inner static ring, the middle static ring and the outer static ring.
2. The axial multi-lip labyrinth seal for a rotating shaft according to claim 1, characterized in that: and an inclined auxiliary sealing lip is arranged outwards along the radial direction of the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring.
3. The axial multi-lip labyrinth seal for a rotating shaft according to claim 1, characterized in that: the sealing lip is internally provided with an annular spring piece with a V-shaped section, the spring piece is fixed at the end part of the sealing lip, and the sealing lip is always kept in a close-fitting state with the inner static ring and the outer static ring under the expansion action of the spring piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787913.5A CN110594414B (en) | 2019-08-26 | 2019-08-26 | Axial multi-lip labyrinth seal device for rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787913.5A CN110594414B (en) | 2019-08-26 | 2019-08-26 | Axial multi-lip labyrinth seal device for rotating shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110594414A true CN110594414A (en) | 2019-12-20 |
| CN110594414B CN110594414B (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910787913.5A Active CN110594414B (en) | 2019-08-26 | 2019-08-26 | Axial multi-lip labyrinth seal device for rotating shaft |
Country Status (1)
| Country | Link |
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| CN (1) | CN110594414B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696485A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Non-contact combined seal for gearbox |
| CN113983171A (en) * | 2021-09-26 | 2022-01-28 | 华能甘肃西固热电有限公司 | Base dynamic and static sealing device for ZGM95G type coal mill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1016155A (en) * | 1950-04-11 | 1952-11-04 | Prep Ind Combustibles | Device ensuring the sealing of rotating parts |
| US20040026867A1 (en) * | 2002-08-09 | 2004-02-12 | Adams David J. | Bearing seal |
| CN101317029A (en) * | 2005-12-08 | 2008-12-03 | Nok株式会社 | Lip type seal |
| CN204201100U (en) * | 2014-10-31 | 2015-03-11 | 武汉新置密封科技有限公司 | A kind of assembly type revolution lip labyrinth gland |
| CN205155156U (en) * | 2015-10-20 | 2016-04-13 | 邓伦胜 | Labyrinth is grease discharging sealing device independently |
-
2019
- 2019-08-26 CN CN201910787913.5A patent/CN110594414B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1016155A (en) * | 1950-04-11 | 1952-11-04 | Prep Ind Combustibles | Device ensuring the sealing of rotating parts |
| US20040026867A1 (en) * | 2002-08-09 | 2004-02-12 | Adams David J. | Bearing seal |
| CN101317029A (en) * | 2005-12-08 | 2008-12-03 | Nok株式会社 | Lip type seal |
| CN204201100U (en) * | 2014-10-31 | 2015-03-11 | 武汉新置密封科技有限公司 | A kind of assembly type revolution lip labyrinth gland |
| CN205155156U (en) * | 2015-10-20 | 2016-04-13 | 邓伦胜 | Labyrinth is grease discharging sealing device independently |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696485A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Non-contact combined seal for gearbox |
| CN113983171A (en) * | 2021-09-26 | 2022-01-28 | 华能甘肃西固热电有限公司 | Base dynamic and static sealing device for ZGM95G type coal mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110594414B (en) | 2021-07-16 |
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