CN216045435U - Built-in axial oil seal device - Google Patents
Built-in axial oil seal device Download PDFInfo
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- CN216045435U CN216045435U CN202121762303.9U CN202121762303U CN216045435U CN 216045435 U CN216045435 U CN 216045435U CN 202121762303 U CN202121762303 U CN 202121762303U CN 216045435 U CN216045435 U CN 216045435U
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- end cover
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Abstract
The utility model provides an internal axial oil seal device, which consists of a static ring and a dynamic ring, wherein the static ring is integrally positioned in an installation groove and covers the dynamic ring, the static ring comprises a static connection ring, a first static sealing ring and a second static sealing ring, a pressure plate is fixedly arranged on the side wall of an end cover, and the pressure plate is tightly attached to the side surface of the second static sealing ring, which is far away from the end cover; the rotating ring comprises a moving connecting ring, a first moving sealing ring and a second moving sealing ring, a first sealing lip is connected to the first moving sealing ring in an inclined mode, the side face, deviating from the end cover, of the first static sealing ring is in contact sealing, a second sealing lip is connected to the second moving sealing ring in an inclined mode, the side face, towards the end cover, of the second sealing lip and the side face, on the second static sealing ring, of the second sealing lip is in contact sealing, and the moving connecting ring is sleeved on the rotating shaft. 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 internal axial oil seal device which can better 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 internal axial oil seal device is arranged in an installation groove arranged on the side wall of an end cover and sleeved on a rotating shaft, 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 sealed cavity, the built-in axial oil seal device consists of a static ring and a dynamic ring, the static ring is integrally positioned in the mounting groove and covers the dynamic ring, the section of the static ring is in an inverted U shape and comprises a static connecting ring arranged along the axial direction and a first static sealing ring and a second static sealing ring which are arranged along the radial direction, the static connecting ring, the first static sealing ring and the second static sealing ring are fixedly connected into a whole, the first static sealing ring is positioned at one side close to the end cover and is tightly close to the side wall of the end cover with the static connecting ring, the second static sealing ring is positioned at one side far away from the end cover, a pressing plate is fixedly arranged on the side wall of the end cover, and the pressing plate is tightly attached to the side surface of the second static sealing ring, which is far away from the end cover, and the static ring is integrally fixed in the mounting groove; 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 side that first quiet sealing ring deviates from the end cover, the second moves one side that the sealing ring is located and keeps away from the end cover and its slope is connected with the second seal lip on the side that deviates from the end cover, the side that faces the end cover on second seal lip and the quiet sealing ring of second contacts sealedly, moving connecting ring cover is on the rotation axis and making the whole rotation of rotating ring along with the rotation axis of moving.
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.
And an oil return hole communicated with the sealing cavity is axially formed in the bottom of the first static sealing ring.
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 pressing plate is fixedly connected with the end cover through a bolt.
Compared with the prior art, the built-in axial oil seal device provided by the utility model has the following advantages: 1. the built-in axial oil seal device provided by the utility model has a simple structure, and the sealing lips on the first movable sealing ring and the second movable sealing ring are respectively in contact sealing with the first static sealing ring and the second 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, further guarantees sealed effect. 3. 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. 4. According to the utility model, the bottom of the first static sealing ring is axially provided with the oil return hole communicated with the sealing cavity, and grease entering the sealing cavity can flow back into the end cover through the oil return hole.
Drawings
FIG. 1 is a schematic view of the overall structure of a built-in axial oil seal device provided by the present invention;
in the figure: 1-end cover, 2-rotating shaft, 3-mounting groove, 4-sealing cavity, 5-static connecting ring, 6-first static sealing ring, 7-second static sealing ring, 8-pressing plate, 9-bolt, 10-dynamic connecting ring, 11-first dynamic sealing ring, 12-second dynamic sealing ring, 13-first sealing lip, 14-second sealing lip, 15-clamping hoop, 16-framework, 17-spacer ring and 18-oil return hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The integral structure of the built-in axial oil seal device provided by the utility model is shown in figure 1, the built-in axial oil seal device is arranged in an installation groove 3 arranged on the side wall of an end cover 1 and is sleeved on a rotating shaft 2, 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 sealing cavity 4. The built-in axial oil seal device is composed of a static ring and a dynamic ring, and the static ring is integrally positioned in the mounting groove and covers the dynamic ring.
The section of quiet ring is "U" style of calligraphy of falling, including along the quiet go-between 5 of axial setting and along the quiet sealing ring 6 of first and the quiet sealing ring 7 of second of radial setting, three fixed connection is as an organic whole, and first quiet sealing ring is located the one side of being close to the end cover and leans on the lateral wall of end cover with quiet go-between, and the quiet sealing ring of second is located the one side of keeping away from the end cover, still fixedly on the lateral wall of end cover is provided with clamp plate 8, and the clamp plate is hugged closely on the quiet sealing ring of second deviates from the side of end cover and is fixed in the mounting groove with quiet ring is whole, the clamp plate passes through bolt 9 and end cover fixed connection.
The section of the movable ring is U-shaped, the movable ring comprises a movable connecting ring 10 arranged along the axial direction, and a first movable sealing ring 11 and a second movable sealing ring 12 arranged along the radial direction, the movable connecting ring, the first movable sealing ring and the second movable sealing ring are fixedly connected into a whole, the first movable sealing ring is positioned at one side close to the end cover, the side of the first movable sealing ring facing the end cover is obliquely connected with a first sealing lip 13, the first sealing lip is in contact sealing with the side of the first static sealing ring departing from the end cover, the second movable sealing ring is positioned at one side far away from the end cover, the side of the second movable sealing ring facing away from the end cover is obliquely connected with a second sealing lip 14, the second sealing lip is in contact sealing with the side of the second static sealing ring facing the end cover, an annular hoop 15 is installed on the outer circumference of the movable connecting ring, the movable connecting ring is fixed on the rotating shaft through the hoop, the movable ring integrally rotates along with the rotating shaft, and a framework 16 made of metal materials and provided 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 17 which is arranged along the radial direction and 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. And an oil return hole 18 communicated with the sealing cavity is axially formed in the bottom of the first static sealing ring, and grease entering the sealing cavity can flow back into the end cover through the oil return hole.
Claims (6)
1. The utility model provides an interior built-in axial oil seal device, installs in the mounting groove that sets up on the end cover lateral wall and overlaps on the rotation axis, the rotation axis is installed in the end cover and stretches out from the end cover, and the space between the inside and rotation axis of end cover is seal chamber, its characterized in that: the built-in axial oil seal device consists of a static ring and a dynamic ring, the static ring is integrally positioned in the mounting groove and covers the dynamic ring, the section of the static ring is in an inverted U shape and comprises a static connecting ring arranged along the axial direction and a first static sealing ring and a second static sealing ring which are arranged along the radial direction, the static connecting ring, the first static sealing ring and the second static sealing ring are fixedly connected into a whole, the first static sealing ring is positioned on one side close to the end cover and is tightly leaned against the side wall of the end cover with the static connecting ring, the second static sealing ring is positioned on one side far away from the end cover, a pressing plate is also fixedly arranged on the side wall of the end cover, and the pressing plate is tightly clung to the side surface of the second static sealing ring, which is far away from the end cover, and integrally fixes the static ring in the mounting groove; 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 side that first quiet sealing ring deviates from the end cover, the second moves one side that the sealing ring is located and keeps away from the end cover and its slope is connected with the second seal lip on the side that deviates from the end cover, the side that faces the end cover on second seal lip and the quiet sealing ring of second contacts sealedly, moving connecting ring cover is on the rotation axis and making the whole rotation of rotating ring along with the rotation axis of moving.
2. The built-in axial oil seal device according to claim 1, wherein: 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 built-in axial oil seal device according to claim 1, wherein: and an oil return hole communicated with the sealing cavity is axially formed in the bottom of the first static sealing ring.
4. The built-in axial oil seal device according to claim 1, wherein: and a framework made of metal materials and with a U-shaped section is arranged in the movable ring.
5. The built-in axial oil seal device according to claim 1, wherein: 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.
6. The built-in axial oil seal device according to claim 1, wherein: the pressing plate is fixedly connected with the end cover through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121762303.9U CN216045435U (en) | 2021-07-30 | 2021-07-30 | Built-in axial oil seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121762303.9U CN216045435U (en) | 2021-07-30 | 2021-07-30 | Built-in axial oil seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216045435U true CN216045435U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121762303.9U Active CN216045435U (en) | 2021-07-30 | 2021-07-30 | Built-in axial oil seal device |
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| Country | Link |
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| CN (1) | CN216045435U (en) |
Cited By (2)
| 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 |
| 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 |
-
2021
- 2021-07-30 CN CN202121762303.9U patent/CN216045435U/en active Active
Cited By (2)
| 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 |
| 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 |
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