CN216112079U - Labyrinth sealing device for large gear ring - Google Patents
Labyrinth sealing device for large gear ring Download PDFInfo
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- CN216112079U CN216112079U CN202122208611.3U CN202122208611U CN216112079U CN 216112079 U CN216112079 U CN 216112079U CN 202122208611 U CN202122208611 U CN 202122208611U CN 216112079 U CN216112079 U CN 216112079U
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Abstract
The utility model provides a labyrinth sealing device for a large gear ring, which is arranged between the large gear ring and a gear cover, wherein the large gear ring is positioned in the gear cover, a gap between the interior of the gear cover and the large gear ring is a sealing cavity, the sealing device comprises a supporting ring, a movable ring, a sealing panel and a static ring, the static ring comprises an inner static ring and an outer static ring, the inner static ring and the outer static ring are axially arranged, the inner static ring is positioned at the inner side of the outer static ring, and the inner static ring and the outer static ring are radially fixed on the inner wall of the gear cover through a pressing plate and a bolt; the inner static ring comprises a static connecting ring and two inner sealing rings arranged along the axial direction, and the two inner sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring.
Description
Technical Field
The utility model belongs to the technical field of mechanical sealing, and particularly relates to a device for sealing a large gear ring.
Background
The large gear ring has mechanical rotation, so lubricating grease is required to guarantee lubrication of the large gear ring, abrasion of a gear is reduced, and in order to prevent grease leakage, the lubricating grease inside the large gear ring is usually sealed in a mode of gear ring sealing ring and felt sealing at present. However, the large gear ring can stretch and contract along with the kiln body due to thermal expansion, the stretching amount is more than +/-100 mm, the temperature of the gear ring sealing ring exceeds 100 ℃, and the roundness deviation of the gear ring sealing ring is influenced by thermal expansion and cold contraction, so that the sealing effect of the conventional sealing mode is poor, and grease leakage sometimes occurs.
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 labyrinth sealing device for the large gear ring can well seal a cavity containing lubricating grease between the large gear ring and a gear cover, can still ensure the sealing effect when the large gear ring generates weak deflection, and has the advantages of simple structure, convenience in installation and long service life.
The technical scheme adopted for realizing the above purpose of the utility model is as follows:
a labyrinth sealing device for a large gear ring is arranged between the large gear ring and a gear cover, the large gear ring is positioned in the gear cover, a gap between the inside of the gear cover and the large gear ring is a sealing cavity, the sealing device comprises a support ring, a movable ring, a sealing panel and a static ring, the cross section of the support ring is in a 'door' shape, the opening of the support ring faces the large gear ring and is fixed on the inner wall of the large gear ring, the outer circular surface of the moving ring is in contact with the support ring, the support ring is sleeved on the moving ring, the sealing panel consists of an inner sealing panel and an outer sealing panel, the inner sealing panel and the outer sealing panel are both annular, the inner sealing panel and the outer sealing panel are both axially arranged and are positioned in the outer sealing panel, one ends of the inner sealing panel and the outer sealing panel are both inserted into slots arranged on the side wall of the moving ring, the other ends of the inner sealing panel and the outer sealing panel extend towards the direction of the stationary ring, and the moving ring, the support ring and the sealing panel are radially connected and fixed through a pressure plate and a bolt;
the static ring comprises an inner static ring and an outer static ring, the inner static ring and the outer static ring are arranged along the axial direction, the inner static ring is positioned on the inner side of the outer static ring, and the inner static ring and the outer static ring are radially fixed on the inner wall of the gear cover through a pressure plate and a bolt; the inner static ring comprises a static connecting ring and two inner sealing rings arranged along the axial direction, the two inner sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the three are of an integrated structure, the joint of the three is folded and arranged to be of an inwards concave structure, the two inner sealing rings cover the inner sealing panel in a cavity formed by the two inner sealing rings, more than one inclined sealing lip is arranged on the circular surface of each of the two inner sealing rings facing the inner sealing panel, and the sealing lips are tightly attached to the inner sealing panel for contact sealing; the outer static ring comprises a static connecting ring and two outer sealing rings arranged along the axial direction, the two outer sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the three are of an integrated structure, the joint of the three is folded and arranged to be of a concave structure, the two outer sealing rings cover the outer sealing panel in a cavity formed by the two outer sealing rings, more than one inclined sealing lip is arranged on the circular surface of each of the two outer sealing rings facing the outer sealing panel, and the sealing lips are tightly attached to the outer sealing panel for contact sealing; and a zigzag labyrinth seal cavity is formed among the inner seal ring, the outer seal ring, the inner seal panel and the outer seal panel.
And the support ring is welded and fixed on the inner wall of the large gear ring.
The movable ring, the supporting ring and the sealing panel are radially connected and fixed through the pressing plate and two groups of bolts, wherein one group of bolts are radially connected and fixed with the movable ring and the supporting ring, and the other group of bolts are radially connected and fixed with the movable ring, the supporting ring and the sealing panel inserted into the movable ring.
And three sealing lips which incline towards the static connecting ring are arranged on the circular surfaces of the two inner sealing rings towards the inner sealing panel, and three sealing lips which incline towards the static connecting ring are arranged on the circular surfaces of the two outer sealing rings towards the outer sealing panel.
At least one sealing lip inclining towards the moving ring is arranged at the edge of the circular face of the two inner sealing rings towards the inner sealing panel and at the edge of the circular face of the two outer sealing rings towards the outer sealing panel.
Compared with the prior art, the labyrinth sealing device for the large gear ring provided by the utility model has the following advantages: 1. the utility model has simple structure, the two inner sealing rings cover the inner sealing panel in the cavity formed by the two inner sealing rings and the two outer sealing rings cover the outer sealing panel in the cavity formed by the two inner sealing rings, the sealing lips are in contact sealing with the sealing panel, good sealing effect is realized through multiple sealing, and meanwhile, a zigzag labyrinth sealing cavity is formed among the inner sealing ring, the outer sealing ring, the inner sealing panel and the outer sealing panel. 2. In the utility model, the joints of the two inner sealing rings and the joints of the two outer sealing rings and the static connecting ring are all folded and arranged to be in a concave structure, when the large gear ring rotates and generates weak axial deflection, the deflection force is stressed on the concave structure instead of the inner sealing ring or the outer sealing ring, thus the deflection resistance is improved, the sealing lip can still be in close contact with the inner sealing panel or the outer sealing panel when deflecting, and the sealing effect of the sealing device is ensured. 3. The sealing lip is obliquely arranged and is in interference fit with the sealing panel, even if the sealing lip is abraded, the sealing lip can be continuously inclined towards the static connecting ring and is tightly attached to the sealing panel, meanwhile, the sealing lip which is inclined towards the dynamic ring is arranged at the edge of the circular surface of the inner sealing ring and the edge of the circular surface of the outer sealing ring, and the sealing lip which is inclined towards the static connecting ring form a splayed shape, so that the sealing effect is further enhanced. 4. The support ring is of a 'door' -shaped structure, so that the stability of the sealing process is ensured, and the damage of the large gear ring caused by the contact of a bolt and the large gear ring can be avoided, thereby prolonging the service life of the sealing device and the large gear ring and ensuring the sealing effect.
Drawings
Fig. 1 is a schematic overall structure view of a labyrinth seal device for a large ring gear provided in embodiment 1;
FIG. 2 is a schematic view of the overall structure of the labyrinth seal device for a large ring gear provided in embodiment 2;
in the figure: 1-gear cover, 2-big gear ring, 3-sealing cavity, 4-support ring, 5-dynamic ring, 6-external sealing ring, 7-static connection ring, 8-internal sealing panel, 9-internal sealing ring, 10-sealing lip, 11-bolt, 12-pressure plate, 13-external sealing panel, 14-external static ring and 15-internal static ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the labyrinth sealing device for a large gear ring provided in this embodiment is installed between a large gear ring 2 and a gear cover 1, the large gear ring is located inside the gear cover, a gap between the inside of the gear cover and the large gear ring is a sealing cavity 3, the sealing device includes a support ring 4, a moving ring 5, a sealing panel and a stationary ring, wherein the support ring has a cross-section in a shape of a "door", an opening of the support ring faces the large gear ring and is fixed on an inner wall of the large gear ring by welding, an outer circumferential surface of the moving ring contacts with the support ring, the support ring is sleeved on the moving ring, the sealing panel is composed of an inner sealing panel 8 and an outer sealing panel 13, the inner sealing panel and the outer sealing panel are both annular, both are axially disposed and are located inside the outer sealing panel, one end of each is inserted into a slot provided on a side wall of the moving ring, and the other end of each extends toward the stationary ring, the movable ring, the supporting ring and the sealing panel are radially connected and fixed through a pressing plate 12 and two groups of bolts 11, wherein one group of bolts are used for radially connecting and fixing the movable ring and the supporting ring, and the other group of bolts are used for radially connecting and fixing the movable ring, the supporting ring and the sealing panel inserted into the movable ring;
the static ring comprises an inner static ring 15 and an outer static ring 14, the inner static ring and the outer static ring are arranged along the axial direction and are positioned on the inner side of the outer static ring, and the inner static ring and the outer static ring are radially fixed on the inner wall of the gear cover through a pressure plate and a bolt; the inner static ring comprises a static connecting ring 7 and two inner sealing rings 9 arranged along the axial direction, the two inner sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the three are of an integrated structure, the joint of the three is folded and arranged to be of an inwards concave structure, the two inner sealing rings cover the inner sealing panel in a cavity formed by the two inner sealing rings, three sealing lips inclined towards the static connecting ring are arranged on the circular surfaces of the two inner sealing rings facing the inner sealing panel, and the sealing lips are tightly attached to the inner sealing panel for contact sealing; the outer static ring comprises a static connecting ring and two outer sealing rings 6 arranged along the axial direction, the two outer sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the two outer sealing rings are of an integrated structure, the joint of the three outer sealing rings is folded and arranged to be of a concave structure, the two outer sealing rings cover the outer sealing panel in a cavity formed by the two outer sealing rings, three sealing lips 10 inclined towards the static connecting ring are arranged on the circular surfaces of the two outer sealing rings facing the outer sealing panel, and the sealing lips are tightly attached to the outer sealing panel for contact sealing; and a zigzag labyrinth seal cavity is formed among the inner seal ring, the outer seal ring, the inner seal panel and the outer seal panel.
Example 2
As shown in fig. 2, the overall structure of the labyrinth seal device for a bull gear provided in this embodiment is the same as that of embodiment 1, except that a sealing lip inclined toward the rotating ring is provided at the edge of the circular face of the two inner seal rings facing the inner seal panel, and a sealing lip inclined toward the rotating ring is provided at the edge of the circular face of the two outer seal rings facing the outer seal panel.
Claims (5)
1. The utility model provides a labyrinth seal device for bull gear, installs between bull gear and gear cover, the bull gear is located the inside of gear cover, and the space between the inside and the bull gear of gear cover is sealed chamber, its characterized in that: the sealing device comprises a support ring, a movable ring, a sealing panel and a static ring, wherein the cross section of the support ring is in a 'door' shape, the opening of the support ring faces the large gear ring and is fixed on the inner wall of the large gear ring, the outer circular surface of the movable ring is in contact with the support ring, the support ring is sleeved on the movable ring, the sealing panel consists of an inner sealing panel and an outer sealing panel, the inner sealing panel and the outer sealing panel are both annular, the inner sealing panel and the outer sealing panel are both axially arranged and are positioned in the outer sealing panel, one ends of the inner sealing panel and the outer sealing panel are both inserted into slots arranged on the side wall of the movable ring, the other ends of the inner sealing panel and the outer sealing panel extend towards the direction of the static ring, and the movable ring, the support ring and the sealing panel are radially connected and fixed through a pressing plate and a bolt;
the static ring comprises an inner static ring and an outer static ring, the inner static ring and the outer static ring are arranged along the axial direction, the inner static ring is positioned on the inner side of the outer static ring, and the inner static ring and the outer static ring are radially fixed on the inner wall of the gear cover through a pressure plate and a bolt; the inner static ring comprises a static connecting ring and two inner sealing rings arranged along the axial direction, the two inner sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the three are of an integrated structure, the joint of the three is folded and arranged to be of an inwards concave structure, the two inner sealing rings cover the inner sealing panel in a cavity formed by the two inner sealing rings, more than one inclined sealing lip is arranged on the circular surface of each of the two inner sealing rings facing the inner sealing panel, and the sealing lips are tightly attached to the inner sealing panel for contact sealing; the outer static ring comprises a static connecting ring and two outer sealing rings arranged along the axial direction, the two outer sealing rings are connected to one side, close to the dynamic ring, of the static connecting ring, the three are of an integrated structure, the joint of the three is folded and arranged to be of a concave structure, the two outer sealing rings cover the outer sealing panel in a cavity formed by the two outer sealing rings, more than one inclined sealing lip is arranged on the circular surface of each of the two outer sealing rings facing the outer sealing panel, and the sealing lips are tightly attached to the outer sealing panel for contact sealing; and a zigzag labyrinth seal cavity is formed among the inner seal ring, the outer seal ring, the inner seal panel and the outer seal panel.
2. The labyrinth sealing device for a large ring gear according to claim 1, characterized in that: and the support ring is welded and fixed on the inner wall of the large gear ring.
3. The labyrinth sealing device for a large ring gear according to claim 1, characterized in that: the movable ring, the supporting ring and the sealing panel are radially connected and fixed through the pressing plate and two groups of bolts, wherein one group of bolts are radially connected and fixed with the movable ring and the supporting ring, and the other group of bolts are radially connected and fixed with the movable ring, the supporting ring and the sealing panel inserted into the movable ring.
4. The labyrinth sealing device for a large ring gear according to claim 1, characterized in that: and three sealing lips which incline towards the static connecting ring are arranged on the circular surfaces of the two inner sealing rings towards the inner sealing panel, and three sealing lips which incline towards the static connecting ring are arranged on the circular surfaces of the two outer sealing rings towards the outer sealing panel.
5. The labyrinth seal for a large ring gear according to claim 4, characterized in that: at least one sealing lip inclining towards the moving ring is arranged at the edge of the circular face of the two inner sealing rings towards the inner sealing panel and at the edge of the circular face of the two outer sealing rings towards the outer sealing panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208611.3U CN216112079U (en) | 2021-09-13 | 2021-09-13 | Labyrinth sealing device for large gear ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208611.3U CN216112079U (en) | 2021-09-13 | 2021-09-13 | Labyrinth sealing device for large gear ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216112079U true CN216112079U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122208611.3U Active CN216112079U (en) | 2021-09-13 | 2021-09-13 | Labyrinth sealing device for large gear ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216112079U (en) |
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2021
- 2021-09-13 CN CN202122208611.3U patent/CN216112079U/en active Active
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