CN210890094U - Multi-lip support dynamic sealing device - Google Patents
Multi-lip support dynamic sealing device Download PDFInfo
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- CN210890094U CN210890094U CN201921861245.8U CN201921861245U CN210890094U CN 210890094 U CN210890094 U CN 210890094U CN 201921861245 U CN201921861245 U CN 201921861245U CN 210890094 U CN210890094 U CN 210890094U
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- lip
- sealing
- sealing lip
- end cover
- rotating shaft
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Abstract
The utility model provides a multi-lip supporting dynamic sealing device, which consists of a supporting part and a sealing part which are connected into a whole, wherein the supporting part is sleeved on a rotating shaft and is contacted with the surface of the rotating shaft, and the whole sealing device is fixed with the rotating shaft through a hose clamp and rotates along with the rotating shaft; the sealing part comprises a first sealing ring and a second sealing ring, the first sealing ring is positioned between the rotating shaft and the end cover, the cross section of the first sealing ring is in a '>' shape and consists of a first inner sealing lip and a first outer sealing lip, wherein the inner circular surface of the first inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the first outer sealing lip is tightly contacted and sealed with the end cover; the second sealing ring is positioned in the annular groove on the side surface of the end cover, the section of the second sealing ring is in a '>' shape and consists of a second inner sealing lip and a second outer sealing lip, and the inner circular surface of the second inner sealing lip and the outer circular surface of the second outer sealing lip are tightly contacted and sealed with the inner wall of the groove. The structure is simple, the installation is convenient, the maintenance is easy, and the service life is long.
Description
Technical Field
The utility model provides a sealing device especially provides a sealing device who is arranged in the axis of rotation to seal the axis of rotation, belongs to mechanical seal technical field.
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 utility model discloses the needle provides a many lips support dynamic seal device, and the device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the end cover, and its simple structure, simple to operate, easy to maintain, life are permanent.
Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:
a multi-lip supporting dynamic sealing 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 sealing cavity, an annular groove is formed in the side face of the end cover, the multi-lip supporting dynamic sealing device is of an integral structure or an open structure and consists of a supporting part and a sealing part which are connected into a whole, the supporting part is sleeved on the rotating shaft and is in contact with the surface of the rotating shaft, a throat hoop is arranged outside the supporting part, and the whole sealing device is fixed with the rotating shaft through the throat hoop and rotates along with the rotating shaft;
the sealing part comprises a first sealing ring and a second sealing ring, the right ends of the first sealing ring and the second sealing ring are fixedly connected to the side surface of the supporting part, the first sealing ring is positioned between the rotating shaft and the end cover, the cross section of the first sealing ring is in a '>' shape and consists of a first inner sealing lip and a first outer sealing lip, the inner circular surface of the first inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the first outer sealing lip is tightly contacted and sealed with the end cover; the second sealing ring is positioned in the annular groove on the side surface of the end cover, the section of the second sealing ring is in a '>' shape and consists of a second inner sealing lip and a second outer sealing lip, and the inner circular surface of the second inner sealing lip and the outer circular surface of the second outer sealing lip are tightly contacted and sealed with the inner wall of the groove.
The first spring piece is fixed between the first inner sealing lip and the first outer sealing lip, the outer circular surface of the first spring piece and the inner circular surface of the first inner sealing lip are attached to each other, the first inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece, and the first outer sealing lip is always in close contact with the end cover.
The second spring piece is fixed between the second inner sealing lip and the second outer sealing lip, the outer circular surface of the second inner sealing lip and the inner circular surface of the second outer sealing lip are attached to the second spring piece, and the second inner sealing lip and the second outer sealing lip are always in close contact with the inner wall of the groove under the expansion elasticity of the second spring piece.
Still be provided with the dust lip in the sealing, the right-hand member fixed connection of dust lip is on the side of supporting part, and the dust lip slope sets up, and the left side of dust lip is hugged closely on the lateral wall of end cover and is sealed.
An outward arc-shaped recess is formed in the position where the right end of the first sealing ring is connected with the supporting portion.
Compared with the prior art, the utility model provides a many lips support dynamic seal device has following advantage: 1. the utility model discloses simple structure, through the sealed between sealing and the end cover, the outer disc of first external seal lip and end cover in close contact with, the interior disc of second internal seal lip and the outer disc of second external seal lip and recess inner wall in close contact with realize sealed promptly. 2. The utility model discloses well whole sealing device is fixed and is followed the axis of rotation through larynx hoop and rotating shaft rotatory, and whole many lips support dynamic seal device simultaneously can set up to whole circle formula structure or open type structure, consequently the installation with maintain the convenience. 3. The utility model discloses in the embedding have first/two spring leafs in first/two seal ring, first/two spring leafs make interior/external seal lip remain throughout and hug closely the state, even if lead to interior/external seal lip to produce wearing and tearing through long-time use, because the expansion elasticity of first/two spring leafs, also can make interior/external seal lip all the time with end cover in close contact with to guarantee sealed effect. 4. The position department that the right-hand member of first sealing ring is connected with the supporting part is provided with the arc sunken of outwards, and this design can guarantee that sealing device is whole rotatory and the axis of rotation when having appeared the beat following the axis of rotation, can warp through the connection position of first/second sealing ring to this reply beat.
Drawings
Fig. 1 is a schematic view of the overall structure of the multi-lip supporting dynamic sealing device provided by the present invention;
in the figure: 1-end cover, 2-rotating shaft, 3-sealing cavity, 4-groove, 5-supporting part, 6-throat hoop, 7-first sealing ring, 8-second sealing ring, 9-first inner sealing lip, 10-first outer sealing lip, 11-second inner sealing lip, 12-second outer sealing lip, 13-first spring piece, 14-second spring piece, 15-dust-proof lip and 16-arc-shaped recess.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides an overall structure of multi-lip support dynamic seal device is shown in figure 1, installs between axis of rotation 2 and end cover 1, 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 3, the side of end cover is provided with annular recess 4, multi-lip support dynamic seal device is whole circle formula structure or open type structure, comprises supporting part 5 and sealing part as an organic whole by connecting, the supporting part cover contacts in the axis of rotation and with the surface of axis of rotation, and the outside of supporting part is provided with hose clamp 6, and whole sealing device is fixed and is followed the axis of rotation through hose clamp and axis of rotation.
The sealing part comprises a first sealing ring 7, a second sealing ring 8 and a dust lip 15, the right ends of the first sealing ring and the second sealing ring are fixedly connected to the side face of the supporting part, and an outward arc-shaped recess 16 is formed in the position where the right end of the first sealing ring is connected with the supporting part. The right end of the dust lip 15 is fixedly connected to the side face of the supporting portion, the dust lip is obliquely arranged, and the left side of the dust lip is tightly attached to the side wall of the end cover and sealed.
The first sealing ring is positioned between the rotating shaft and the end cover, the cross section of the first sealing ring is in a '>' shape, and the first sealing ring is composed of a first inner sealing lip 9 and a first outer sealing lip 10, wherein the inner circular surface of the first inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the first outer sealing lip is tightly contacted and sealed with the end cover; the first spring piece 13 is arranged in the first sealing ring, the whole first spring piece is annular, the cross section of the first spring piece is in a '>' shape, the first spring piece is fixed between the first inner sealing lip and the first outer sealing lip, the outer circular surface of the first spring piece and the first inner sealing lip are attached to the inner circular surface of the first outer sealing lip, the first inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece, and the first outer sealing lip is always in close contact with the end cover.
The second sealing ring is positioned in the annular groove on the side surface of the end cover, the section of the second sealing ring is in a '>' shape and consists of a second inner sealing lip 11 and a second outer sealing lip 12, and the inner circular surface of the second inner sealing lip and the outer circular surface of the second outer sealing lip are both in close contact sealing with the inner wall of the groove. The second spring piece 14 is arranged in the second sealing ring, the whole second spring piece is annular, the cross section of the second spring piece is in a '>' shape, the second spring piece is fixed between the second inner sealing lip and the second outer sealing lip, the outer circular surface of the second spring piece and the second inner sealing lip are attached to the inner circular surface of the second outer sealing lip, and the second inner sealing lip and the second outer sealing lip are always in tight contact with the inner wall of the groove under the expansion elasticity of the second spring piece.
Claims (5)
1. The utility model provides a many lips support dynamic 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, the side of end cover is provided with annular recess, its characterized in that: the multi-lip supporting dynamic sealing device is of an integral ring structure or an opening structure and consists of a supporting part and a sealing part which are connected into a whole, the supporting part is sleeved on the rotating shaft and is in contact with the surface of the rotating shaft, a hose clamp is arranged outside the supporting part, and the whole sealing device is fixed with the rotating shaft through the hose clamp and rotates along with the rotating shaft;
the sealing part comprises a first sealing ring and a second sealing ring, the right ends of the first sealing ring and the second sealing ring are fixedly connected to the side surface of the supporting part, the first sealing ring is positioned between the rotating shaft and the end cover, the cross section of the first sealing ring is in a '>' shape and consists of a first inner sealing lip and a first outer sealing lip, the inner circular surface of the first inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the first outer sealing lip is tightly contacted and sealed with the end cover; the second sealing ring is positioned in the annular groove on the side surface of the end cover, the section of the second sealing ring is in a '>' shape and consists of a second inner sealing lip and a second outer sealing lip, and the inner circular surface of the second inner sealing lip and the outer circular surface of the second outer sealing lip are tightly contacted and sealed with the inner wall of the groove.
2. The multi-lip support dynamic seal of claim 1, wherein: the first spring piece is fixed between the first inner sealing lip and the first outer sealing lip, the outer circular surface of the first spring piece and the inner circular surface of the first inner sealing lip are attached to each other, the first inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the first spring piece, and the first outer sealing lip is always in close contact with the end cover.
3. The multi-lip support dynamic seal of claim 1, wherein: the second spring piece is fixed between the second inner sealing lip and the second outer sealing lip, the outer circular surface of the second inner sealing lip and the inner circular surface of the second outer sealing lip are attached to the second spring piece, and the second inner sealing lip and the second outer sealing lip are always in close contact with the inner wall of the groove under the expansion elasticity of the second spring piece.
4. The multi-lip support dynamic seal of claim 1, wherein: still be provided with the dust lip in the sealing, the right-hand member fixed connection of dust lip is on the side of supporting part, and the dust lip slope sets up, and the left side of dust lip is hugged closely on the lateral wall of end cover and is sealed.
5. The multi-lip support dynamic seal of claim 1, wherein: an outward arc-shaped recess is formed in the position where the right end of the first sealing ring is connected with the supporting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921861245.8U CN210890094U (en) | 2019-10-31 | 2019-10-31 | Multi-lip support dynamic sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921861245.8U CN210890094U (en) | 2019-10-31 | 2019-10-31 | Multi-lip support dynamic sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210890094U true CN210890094U (en) | 2020-06-30 |
Family
ID=71320683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921861245.8U Active CN210890094U (en) | 2019-10-31 | 2019-10-31 | Multi-lip support dynamic sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210890094U (en) |
-
2019
- 2019-10-31 CN CN201921861245.8U patent/CN210890094U/en active Active
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