CN110553037B - Radial multi-lip labyrinth seal device for rotating shaft - Google Patents
Radial multi-lip labyrinth seal device for rotating shaft Download PDFInfo
- Publication number
- CN110553037B CN110553037B CN201910787894.6A CN201910787894A CN110553037B CN 110553037 B CN110553037 B CN 110553037B CN 201910787894 A CN201910787894 A CN 201910787894A CN 110553037 B CN110553037 B CN 110553037B
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- China
- Prior art keywords
- ring
- sealing
- lip
- rotating shaft
- sealing ring
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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
- F16J15/34—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 a radial multi-lip labyrinth sealing device for a rotating shaft, which consists of a moving ring and a static ring, wherein the static ring consists of a herringbone sealing ring, the herringbone sealing ring is positioned in an end cover and is fixed with the end cover through interference fit, and the herringbone sealing ring is of an integral structure or a split structure; the section of the movable ring is in a Pi shape, the movable ring comprises a main ring and two multi-lip sealing rings, the main ring is axially arranged, the multi-lip sealing rings are radially arranged, the main ring is sleeved on the rotating shaft, is fixed with the rotating shaft through interference fit and rotates along with the rotating shaft, frameworks are arranged inside the main ring and the multi-lip sealing rings, and sealing lips with X-shaped sections are arranged on the outer circumferences of the multi-lip sealing rings; the multi-lip sealing ring is positioned inside the Chinese character 'shan' shaped sealing ring, and the sealing lips are in close contact sealing with the inner side surface of the Chinese character 'shan' shaped 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 a radial 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:
a radial 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 radial multi-lip labyrinth seal device is composed of a movable ring and a static ring, the static ring is composed of a herringbone seal ring, the herringbone seal ring is positioned in the end cover and is fixed with the end cover through interference fit, the herringbone seal ring is of an integral structure or a split structure, and the section of the herringbone seal ring is in a herringbone shape;
the section of the movable ring is in a pi shape, the movable ring comprises a main ring and two multi-lip sealing rings, the main ring is axially arranged, the multi-lip sealing rings are radially arranged, the main ring is sleeved on the rotating shaft, is fixed with the rotating shaft through interference fit and rotates along with the rotating shaft, frameworks with the section in the pi shape are arranged in the main ring and the multi-lip sealing rings, and sealing lips with the section in an X shape are arranged on the outer circumference of each multi-lip sealing ring; the multi-lip sealing ring is positioned in the inverted-V-shaped sealing ring, the multi-lip sealing ring and the inverted-V-shaped sealing ring are inserted in a staggered mode, and the sealing lips are in close contact with and seal with the inner side face of the inverted-V-shaped sealing ring.
The left end and the right end of the main ring in the movable ring are respectively provided with an inclined auxiliary sealing lip outwards along the radial direction, and the auxiliary sealing lips are tightly contacted and sealed with the outer side surface of the E-shaped sealing ring.
The sealing lips are all provided with V-shaped annular spring pieces which are fixed on the outer circumferences of the sealing lips, so that the sealing lips and the E-shaped sealing rings are always kept in a close-fitting state.
Compared with the prior art, the radial 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 V-shaped annular spring pieces are arranged in the sealing lips, so that the sealing lips and the E-shaped sealing ring are always kept in a close-fitting state, and even if the sealing lips are worn due to long-term use, the sealing lips can be tightly attached to the static ring due to the expansion elasticity of the annular spring pieces, thereby ensuring the sealing effect.
Drawings
FIG. 1 is a schematic overall structure view of a radial multi-lip labyrinth seal device for a rotating shaft according to the present invention;
in the figure: the sealing structure comprises an end cover 1, a rotating shaft 2, a sealing cavity 3, a connecting ring 4, a Chinese character 'shan' type sealing ring 5, a main ring 6, a multi-lip sealing ring 7, a framework 8, a sealing lip 9, an auxiliary sealing lip 10 and a spring piece 11.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The radial multi-lip labyrinth sealing device for the rotating shaft is characterized in that the overall structure is as shown in figure 1, the radial multi-lip 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 radial multi-lip labyrinth sealing device is composed of a moving ring and a static ring, the static ring is composed of a chevron-shaped sealing ring 5, the chevron-shaped sealing ring is positioned in the end cover and is fixed with the end cover through interference fit, and the cross section of the chevron-shaped sealing ring is in a chevron shape. The Chinese character shan-shaped sealing ring in the embodiment is of a split structure and is composed of a connecting ring 4, a U-shaped ring and an L-shaped ring.
The cross-section of rotating ring is the pi style of calligraphy, including the main ring 6 of axial setting and the many lips sealing ring 7 of two radial settings, the main ring cover is fixed mutually in the axis of rotation and through interference fit and axis of rotation to along with the axis of rotation, the inside of main ring and many lips sealing ring is provided with the skeleton 8 that the cross-section is the pi style of calligraphy, is provided with the seal lip 9 that the cross-section is the X type on the outer circumference of many lips sealing ring, many lips sealing ring is located the inside of chinese style of calligraphy sealing ring, and both alternate and alternate, and the medial surface in close contact with of seal lip and chinese style of calligraphy sealing ring is sealed. The sealing lips are all provided with V-shaped annular spring pieces 11 which are fixed on the outer circumferences of the sealing lips, so that the sealing lips and the E-shaped sealing rings are always kept in a close-fitting state. The left end and the right end of the main ring in the movable ring are respectively provided with an inclined auxiliary sealing lip 10 outwards along the radial direction, and the auxiliary sealing lips are tightly contacted and sealed with the outer side surface of the E-shaped sealing ring.
Claims (1)
1. A radial 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, and a gap between the inside of the end cover and the rotating shaft is a seal cavity and is characterized in that: the radial multi-lip labyrinth sealing device comprises a movable ring and a static ring, the static ring comprises a herringbone sealing ring, the herringbone sealing ring is positioned in the end cover and is fixed with the end cover through interference fit, the herringbone sealing ring is of an integral structure or a split structure, and the cross section of the herringbone sealing ring is in a herringbone shape;
the section of the movable ring is in a pi shape, the movable ring comprises a main ring and two multi-lip sealing rings, the main ring is axially arranged, the multi-lip sealing rings are radially arranged, the main ring is sleeved on the rotating shaft, is fixed with the rotating shaft through interference fit and rotates along with the rotating shaft, frameworks with the section in the pi shape are arranged in the main ring and the multi-lip sealing rings, and sealing lips with the section in an X shape are arranged on the outer circumference of each multi-lip sealing ring; the multi-lip sealing ring is positioned inside the Chinese character 'shan' shaped sealing ring, the multi-lip sealing ring and the Chinese character 'shan' shaped sealing ring are alternately inserted, and the sealing lips are tightly contacted and sealed with the inner side surface of the Chinese character 'shan' shaped sealing ring; the left end and the right end of the main ring in the movable ring are respectively provided with an inclined auxiliary sealing lip outwards along the radial direction, and the auxiliary sealing lips are tightly contacted and sealed with the outer side surface of the E-shaped sealing ring; the seal lips with the X-shaped cross sections are all provided with V-shaped annular spring pieces, and the spring pieces are fixed on the outermost sides of the seal lips to enable the seal lips and the V-shaped seal rings to be always kept in a close contact state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787894.6A CN110553037B (en) | 2019-08-26 | 2019-08-26 | Radial multi-lip labyrinth seal device for rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787894.6A CN110553037B (en) | 2019-08-26 | 2019-08-26 | Radial multi-lip labyrinth seal device for rotating shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110553037A CN110553037A (en) | 2019-12-10 |
| CN110553037B true CN110553037B (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910787894.6A Active CN110553037B (en) | 2019-08-26 | 2019-08-26 | Radial multi-lip labyrinth seal device for rotating shaft |
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| Country | Link |
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| CN (1) | CN110553037B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075928B (en) * | 2019-12-23 | 2021-10-29 | 麦克维尔空调制冷(苏州)有限公司 | Radial floating type labyrinth seal between rotating part and static part |
| CN113606342A (en) * | 2021-07-30 | 2021-11-05 | 江门市鑫辉特种密封科技有限公司 | Axial and radial combined oil seal device |
| CN115163933A (en) * | 2022-05-30 | 2022-10-11 | 江门市鑫辉特种密封科技有限公司 | Double-end-face feeding and discharging pipe sealing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3776559A (en) * | 1970-10-20 | 1973-12-04 | Cooper Roller Bearings | Shaft seals |
| US5259628A (en) * | 1992-07-23 | 1993-11-09 | Reliance Electric Industrial Company | Seal assembly |
| 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 |
| CN205383266U (en) * | 2016-02-29 | 2016-07-13 | 邓伦胜 | Dredge tooth sealing device |
-
2019
- 2019-08-26 CN CN201910787894.6A patent/CN110553037B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3776559A (en) * | 1970-10-20 | 1973-12-04 | Cooper Roller Bearings | Shaft seals |
| US5259628A (en) * | 1992-07-23 | 1993-11-09 | Reliance Electric Industrial Company | Seal assembly |
| 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 |
| CN205383266U (en) * | 2016-02-29 | 2016-07-13 | 邓伦胜 | Dredge tooth sealing device |
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| Publication number | Publication date |
|---|---|
| CN110553037A (en) | 2019-12-10 |
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