CN210890093U - Multi-lip supporting static sealing device - Google Patents
Multi-lip supporting static sealing device Download PDFInfo
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- CN210890093U CN210890093U CN201921861164.8U CN201921861164U CN210890093U CN 210890093 U CN210890093 U CN 210890093U CN 201921861164 U CN201921861164 U CN 201921861164U CN 210890093 U CN210890093 U CN 210890093U
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- lip
- sealing
- end cover
- sealing lip
- circular surface
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Abstract
The utility model provides a multi-lip supporting static sealing device, which consists of a supporting part and a sealing part which are connected into a whole, wherein the supporting part is fixedly connected with an end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is positioned in a groove arranged on the side wall of the end cover, and the fixing ring is arranged in the end cover through interference fit; the section of the sealing part is in a splayed shape and comprises a sealing lip and a dust lip, wherein the sealing lip is obliquely arranged towards one side of the sealing cavity, the dust lip is obliquely arranged towards one side of the outside, and the outer circular surfaces of the sealing lip and the dust lip are connected to the inner circular surface of the main ring; the cross section of the sealing lip is in a '>' shape and consists of an inner sealing lip and an outer sealing lip, wherein the inner circular surface of the inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the outer sealing lip is tightly contacted and sealed with the end cover. The device has the advantages of simple structure, convenient installation, easy maintenance and long service life.
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 quiet sealing device is supported to many lips, 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 support static 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 inside of the end cover and the rotating shaft is a sealing cavity, the multi-lip support static sealing device is of a whole-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 fixedly connected with the end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is positioned in a groove arranged on the side wall of the end cover, one end of the fixing ring is connected with the main ring into a whole, the fixing ring extends into the inside of the end cover from the groove, and the fixing ring is arranged;
the section of the sealing part is in a splayed shape and comprises a sealing lip and a dust lip, wherein the sealing lip is obliquely arranged towards one side of the sealing cavity, the dust lip is obliquely arranged towards one side of the outside, the outer circular surfaces of the sealing lip and the dust lip are connected to the inner circular surface of the main ring, and the inner circular surface of the dust lip is in contact sealing with the rotating shaft; the cross section of the sealing lip is in a '>' shape and consists of an inner sealing lip and an outer sealing lip, wherein the inner circular surface of the inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the outer sealing lip is tightly contacted and sealed with the end cover.
The spring piece is fixed between the inner sealing lip and the outer sealing lip, the outer circular surface of the spring piece is attached to the inner circular surface of the inner sealing lip, the inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the spring piece, and the outer sealing lip is always in close contact with the end cover.
An annular first bulge is arranged on the outer circumference of the fixing ring.
And the inner circumference of the fixing ring is provided with a second annular bulge.
Compared with the prior art, the utility model provides a many lips support static sealing device has following advantage: 1. the utility model discloses simple structure, through the sealed between sealing and the axis of rotation, the interior disc through dustproof lip contacts with the axis of rotation promptly, the interior disc and the axis of rotation in close contact with of interior sealing lip, the outer disc and the end cover in close contact with of external sealing lip and realize sealing. 2. The utility model discloses well supporting part is fixed through the interference fit between solid fixed ring and the end cover, and whole many lips support static sealing device can set up to whole circle formula structure or open type structure simultaneously, consequently the installation with maintain the convenience. 3. The utility model discloses in there is the spring leaf embedded in seal lip, interior seal lip all the time with axis of rotation in close contact with under the expansion elasticity of spring leaf, outer seal lip all the time with end cover in close contact with. Even if the inner sealing lip is abraded after long-time use, the inner sealing lip can be always in close contact with the rotating shaft due to the expansion elasticity of the spring piece, and therefore the sealing effect is guaranteed.
Drawings
Fig. 1 is a schematic view of the overall structure of the multi-lip supporting static sealing device provided by the present invention;
in the figure: 1-end cover, 2-rotating shaft, 3-sealing cavity, 4-fixing ring, 5-main ring, 6-first bulge, 7-second bulge, 8-sealing lip, 9-dust-proof lip, 10-spring piece, 11-inner sealing lip and 12-outer sealing lip.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a multi-lip supports static sealing device's overall structure 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 the axis of rotation of end cover is sealed chamber 3, multi-lip supports static sealing device and constitutes by connecting supporting part and sealing part as an organic whole for whole circle formula structure or open type structure, supporting part and end cover fixed connection. The supporting part includes along the solid fixed ring 4 of axial setting and along the main ring 5 of radial setting, the main ring is located the recess that sets up on the end cover lateral wall, and solid fixed ring's one end is connected as an organic wholely with the main ring, and gu fixed ring is deepened to the inside of end cover by the recess, gu fixed ring installs in the inside of end cover through interference fit, gu be provided with annular first arch 6 on fixed ring's the outer circumference, gu be provided with annular second arch 7 on fixed ring's the interior circumference. The fixing ring ensures interference fit and fastening with the mounting hole in the end cover through the first protrusion and the second protrusion.
The section of the sealing part is in a splayed shape and comprises a sealing lip 8 which is obliquely arranged towards one side of the sealing cavity and a dust-proof lip 9 which is obliquely arranged towards one side of the outside, the outer circular surfaces of the sealing lip and the dust-proof lip are connected to the inner circular surface of the main ring, and the inner circular surface of the dust-proof lip is in contact sealing with the rotating shaft; the cross section of the sealing lip is in a '>' shape and consists of an inner sealing lip 11 and an outer sealing lip 12, wherein the inner circular surface of the inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the outer sealing lip is tightly contacted and sealed with the end cover. The spring piece 10 is arranged in the sealing lip, the whole spring piece is annular, the cross section of the spring piece is in a '>' shape, the spring piece is fixed between the inner sealing lip and the outer sealing lip, the outer circular surface of the spring piece and the inner circular surface of the inner sealing lip are attached to each other, the inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the spring piece, and the outer sealing lip is always in close contact with the end cover. Even if the inner sealing lip is abraded after long-time use, the inner sealing lip can be always in close contact with the rotating shaft due to the expansion elasticity of the spring piece, and therefore the sealing effect is guaranteed.
Claims (4)
1. The utility model provides a multi-lip supports static 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, its characterized in that: the multi-lip supporting static sealing device is of a whole-circle 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 fixedly connected with the end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is positioned in a groove arranged on the side wall of the end cover, one end of the fixing ring is connected with the main ring into a whole, the fixing ring extends into the end cover from the groove, and the fixing ring is arranged in the end cover in an interference fit manner;
the section of the sealing part is in a splayed shape and comprises a sealing lip and a dust lip, wherein the sealing lip is obliquely arranged towards one side of the sealing cavity, the dust lip is obliquely arranged towards one side of the outside, the outer circular surfaces of the sealing lip and the dust lip are connected to the inner circular surface of the main ring, and the inner circular surface of the dust lip is in contact sealing with the rotating shaft; the cross section of the sealing lip is in a '>' shape and consists of an inner sealing lip and an outer sealing lip, wherein the inner circular surface of the inner sealing lip is tightly contacted and sealed with the rotating shaft, and the outer circular surface of the outer sealing lip is tightly contacted and sealed with the end cover.
2. The multi-lip support static seal of claim 1, wherein: the spring piece is fixed between the inner sealing lip and the outer sealing lip, the outer circular surface of the spring piece is attached to the inner circular surface of the inner sealing lip, the inner sealing lip is always in close contact with the rotating shaft under the expansion elasticity of the spring piece, and the outer sealing lip is always in close contact with the end cover.
3. The multi-lip support static seal of claim 1, wherein: an annular first bulge is arranged on the outer circumference of the fixing ring.
4. The multi-lip support static seal of claim 1, wherein: and the inner circumference of the fixing ring is provided with a second annular bulge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921861164.8U CN210890093U (en) | 2019-10-31 | 2019-10-31 | Multi-lip supporting static sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921861164.8U CN210890093U (en) | 2019-10-31 | 2019-10-31 | Multi-lip supporting static sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210890093U true CN210890093U (en) | 2020-06-30 |
Family
ID=71318661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921861164.8U Active CN210890093U (en) | 2019-10-31 | 2019-10-31 | Multi-lip supporting static sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210890093U (en) |
-
2019
- 2019-10-31 CN CN201921861164.8U patent/CN210890093U/en active Active
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