CN216045434U - External mounted axial oil seal device - Google Patents
External mounted axial oil seal device Download PDFInfo
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- CN216045434U CN216045434U CN202121762292.4U CN202121762292U CN216045434U CN 216045434 U CN216045434 U CN 216045434U CN 202121762292 U CN202121762292 U CN 202121762292U CN 216045434 U CN216045434 U CN 216045434U
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- ring
- end cover
- static
- sealing ring
- oil seal
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides an externally-mounted axial oil seal device, which consists of a static ring and a dynamic ring, wherein the section of the static ring is in a 7 shape and comprises a static connecting ring and a static sealing ring, and the static connecting ring is fixed on the side wall of an end cover; the cross-section of rotating ring is "U" style of calligraphy, including moving the go-between, first move the sealing ring and the second moves the sealing ring, first move the sealing ring be located be close to one side of end cover and its incline upward be connected with first seal lip towards the side of end cover, first seal lip contacts sealedly with the end cover, the second moves the sealing ring and is located keep away from one side of end cover and its incline upward be connected with the second seal lip that deviates from the side of end cover, the second seal lip contacts sealedly with the side of going to the end cover on the quiet sealing ring, move the go-between cover on the rotation axis. The device can carry out better sealed to the cavity that contains lubricating grease between rotation axis and the end cover, and its simple structure, simple to operate, easy to maintain, life are permanent.
Description
Technical Field
The utility model provides a sealing device, in particular provides a device for sealing a 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 closure gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when a 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 utility model provides an externally-mounted axial oil seal device which can well seal a cavity containing lubricating grease between a rotating shaft and an end cover, 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 utility model is as follows:
an externally-mounted axial oil 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 inside of the end cover and the rotating shaft is a sealing cavity, the externally-mounted axial oil seal device is composed of a static ring and a dynamic ring, the section of the static ring is in a 7 shape and comprises a static connecting ring arranged along the axial direction and a static sealing ring arranged along the radial direction, the static connecting ring and the static sealing ring are fixedly connected into a whole, and the static connecting ring is fixed on the side wall of the end cover; the cross-section of rotating ring is "U" style of calligraphy, including the moving connecting ring that sets up along the axial and along the first sealing ring and the second sealing ring that moves of radial setting, three fixed connection is as an organic whole, first moving sealing ring is located one side that is close to the end cover and its slope is connected with first seal lip towards the side of end cover on the slope, first seal lip contacts sealedly with the end cover, the second moves the sealing ring and is located one side of keeping away from the end cover and its slope is connected with the second seal lip that deviates from the side of end cover on the slope, the side towards the end cover on second seal lip and the quiet sealing ring contacts sealedly, moving connecting ring cover is on the rotation axis and makes the whole rotation along with the rotation axis of moving ring.
The inner circumference of the static connecting ring is connected with a spacer ring arranged along the radial direction, the spacer ring is positioned between the first dynamic sealing ring and the second dynamic sealing ring, and the first dynamic sealing ring, the second dynamic sealing ring, the first dynamic sealing ring and the second dynamic sealing ring are interlaced and interpenetrated to form a labyrinth sealing cavity together.
The static ring is of a split structure and is connected through a connecting bolt arranged on the outer circumference of the static connecting ring.
The bottom of the static connecting ring is provided with a grease discharging hole communicated with the outside, and a grease discharging pipe is connected to the grease discharging hole.
And a framework made of metal materials and with a U-shaped section is arranged in the movable ring.
And an annular hoop is arranged on the outer circumference of the movable connecting ring, and the movable ring is integrally fixed on the rotating shaft by the hoop.
The static connecting ring is fixedly connected with the end cover through a fixing bolt.
Compared with the prior art, the externally-mounted axial oil seal device provided by the utility model has the following advantages: 1. the externally-mounted axial oil seal device provided by the utility model is simple in structure, and the sealing lips on the first dynamic sealing ring and the second dynamic sealing ring are respectively in contact sealing with the end cover and the static sealing ring, so that the sealing effect is ensured. 2. The utility model discloses in be provided with the spacer ring on the quiet go-between, the spacer ring moves the crisscross interlude of sealing ring and second with first and forms labyrinth seal chamber jointly, further guarantees sealed effect. 3. The static ring is of a split structure, so that the installation of the static ring and the maintenance of a later-stage oil sealing device are facilitated. 4. According to the utility model, the hoop is arranged on the movable connecting ring, and the metal framework is arranged in the movable ring, so that the stability and the deflection resistance of the sealing device are ensured. 5. In the utility model, the bottom of the static connecting ring is provided with a grease discharging hole communicated with the outside, so that grease entering the sealing cavity is discharged.
Drawings
Fig. 1 is a schematic view of the overall structure of an externally-mounted axial oil seal device provided by the utility model;
in the figure: 1-end cover, 2-rotating shaft, 3-sealing cavity, 4-static connecting ring, 5-static sealing ring, 6-fixing bolt, 7-connecting bolt, 8-dynamic connecting ring, 9-first dynamic sealing ring, 10-second dynamic sealing ring, 11-first sealing lip, 12-second sealing lip, 13-hoop, 14-framework, 15-spacer ring and 16-grease discharging hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The overall structure of the externally-mounted axial oil seal device provided by the utility model is shown in figure 1, and the externally-mounted axial oil seal device is arranged between a rotating shaft 2 and an end cover 1, wherein the rotating shaft is arranged in the end cover and extends out of the end cover, and a gap between the inner part of the end cover and the rotating shaft is a seal cavity 3.
The externally-mounted axial oil seal device consists of a static ring and a dynamic ring, wherein the section of the static ring is in a 7 shape and comprises a static connecting ring 4 arranged along the axial direction and a static sealing ring 5 arranged along the radial direction, the static connecting ring and the static sealing ring are fixedly connected into a whole, and the static connecting ring is fixed on the side wall of the end cover through a fixing bolt 6; in the embodiment, the static ring is of a split structure and is connected through the connecting bolt 7 arranged on the outer circumference of the static connecting ring, so that the static ring is convenient to mount.
The cross-section of rotating ring is "U" style of calligraphy, including the rotating ring 8 that sets up along the axial and along the first movable sealing ring 9 and the second movable sealing ring 10 of radial setting, three fixed connection is as an organic whole, first movable sealing ring is located one side that is close to the end cover and its slope is connected with first seal lip 11 towards the side of end cover on the slope, first seal lip contacts sealedly with the end cover, the second is moved one side that the seal ring is located keeping away from the end cover and its slope is connected with second seal lip 12 on the side that deviates from the end cover on the slope, the side that faces the end cover on second seal lip and the quiet sealing ring contacts sealedly, install annular clamp 13 on the outer circumference of rotating ring, will move the rotating ring and be fixed in on the rotation axis and make the rotating ring whole follow the rotation of rotation axis. A framework 14 made of metal and with a U-shaped section is arranged inside the movable ring.
The inner circumference of the static connecting ring is connected with a spacer ring 15 which is arranged along the radial direction, the spacer ring is positioned between the first dynamic sealing ring and the second dynamic sealing ring, and the first dynamic sealing ring, the second dynamic sealing ring, the first dynamic sealing ring and the second dynamic sealing ring are interlaced and interpenetrated to form a labyrinth sealing cavity. The bottom of the static connecting ring is provided with a grease discharging hole 16 communicated with the outside, and a grease discharging pipe is connected to the grease discharging hole, so that grease in the sealing cavity is discharged.
Claims (7)
1. The utility model provides an adorn formula axial oil seal device outward, installs between rotation axis and end cover, the rotation axis is installed in the end cover and is stretched out from the end cover, and the space between the inside and rotation axis of end cover is sealed chamber, its characterized in that: the external mounted axial oil seal device consists of a static ring and a dynamic ring, the section of the static ring is in a 7 shape and comprises a static connecting ring arranged along the axial direction and a static sealing ring arranged along the radial direction, the static connecting ring and the static sealing ring are fixedly connected into a whole, and the static connecting ring is fixed on the side wall of the end cover; the cross-section of rotating ring is "U" style of calligraphy, including the moving connecting ring that sets up along the axial and along the first sealing ring and the second sealing ring that moves of radial setting, three fixed connection is as an organic whole, first moving sealing ring is located one side that is close to the end cover and its slope is connected with first seal lip towards the side of end cover on the slope, first seal lip contacts sealedly with the end cover, the second moves the sealing ring and is located one side of keeping away from the end cover and its slope is connected with the second seal lip that deviates from the side of end cover on the slope, the side towards the end cover on second seal lip and the quiet sealing ring contacts sealedly, moving connecting ring cover is on the rotation axis and makes the whole rotation along with the rotation axis of moving ring.
2. The externally mounted axial oil seal device according to claim 1, characterized in that: the inner circumference of the static connecting ring is connected with a spacer ring arranged along the radial direction, the spacer ring is positioned between the first dynamic sealing ring and the second dynamic sealing ring, and the first dynamic sealing ring, the second dynamic sealing ring, the first dynamic sealing ring and the second dynamic sealing ring are interlaced and interpenetrated to form a labyrinth sealing cavity together.
3. The externally mounted axial oil seal device according to claim 1, characterized in that: the static ring is of a split structure and is connected through a connecting bolt arranged on the outer circumference of the static connecting ring.
4. The externally mounted axial oil seal device according to claim 1, characterized in that: the bottom of the static connecting ring is provided with a grease discharging hole communicated with the outside, and a grease discharging pipe is connected to the grease discharging hole.
5. The externally mounted axial oil seal device according to claim 1, characterized in that: and a framework made of metal materials and with a U-shaped section is arranged in the movable ring.
6. The externally mounted axial oil seal device according to claim 1, characterized in that: and an annular hoop is arranged on the outer circumference of the movable connecting ring, and the movable ring is integrally fixed on the rotating shaft by the hoop.
7. The externally mounted axial oil seal device according to claim 1, characterized in that: the static connecting ring is fixedly connected with the end cover through a fixing bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121762292.4U CN216045434U (en) | 2021-07-30 | 2021-07-30 | External mounted axial oil seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121762292.4U CN216045434U (en) | 2021-07-30 | 2021-07-30 | External mounted axial oil seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216045434U true CN216045434U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121762292.4U Active CN216045434U (en) | 2021-07-30 | 2021-07-30 | External mounted axial oil seal device |
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| Country | Link |
|---|---|
| CN (1) | CN216045434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2021
- 2021-07-30 CN CN202121762292.4U patent/CN216045434U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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