CN219176916U - Rotary kiln gear wheel sealing device - Google Patents
Rotary kiln gear wheel sealing device Download PDFInfo
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- CN219176916U CN219176916U CN202223260000.4U CN202223260000U CN219176916U CN 219176916 U CN219176916 U CN 219176916U CN 202223260000 U CN202223260000 U CN 202223260000U CN 219176916 U CN219176916 U CN 219176916U
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Abstract
The utility model provides a rotary kiln big gear sealing device, which is arranged between a gear cover and a big gear, wherein the big gear is positioned in the gear cover and rotates relative to the gear cover, and the sealing device comprises: the section of the movable ring is in a C shape, the movable ring is fixedly connected to the outer side of the large gear, the opening of the movable ring faces to one side far away from the large gear, and the movable ring synchronously rotates along with the large gear; the section of the stationary ring is in a C shape, the stationary ring is fixedly connected to the gear cover, an opening of the stationary ring faces to one side close to the large gear, and the stationary ring and the movable ring are alternately inserted, so that a tortuous sealing cavity is formed between the large gear and the gear cover; the movable ring and the stationary ring are distributed with guide rings which are arranged along the radial direction in a staggered way. The sealing device can seal the rotary kiln large gear, has a simple structure and good sealing performance, can prevent oil leakage and water inflow, and has long service life and lower manufacturing cost.
Description
Technical Field
The utility model provides a sealing device, in particular provides a rotary kiln large gear sealing device, and belongs to the technical field of mechanical sealing.
Background
The rotary kiln is a rotary calcining kiln (commonly called a rotary kiln), has a similar appearance to a rotary kiln, is also called a rotary kiln, and belongs to building material equipment. Rotary kilns can be classified into cement kilns, metallurgical chemical kilns and lime kilns according to the materials to be treated. The cement kiln is mainly used for calcining cement clinker, and is divided into two main types, namely cement kiln produced by dry method and cement kiln produced by wet method. The metallurgical chemical kiln is mainly used for magnetizing roasting of lean iron ores in iron and steel plants in metallurgical industry; oxidizing and roasting chromium and nickel iron ores; roasting high alumina bauxite ore in a refractory material factory, roasting clinker in an aluminum factory and aluminum hydroxide; roasting chromium ore sand, chromium ore powder and other minerals in chemical plants. Lime kilns (i.e., active lime kilns) are used to calcine active lime and light burned dolomite for iron and steel plants and ferroalloy plants.
The big gear (big gear ring) of the rotary kiln is arranged on the rotary kiln cylinder body, transmits the power of the transmission part to the cylinder body, is one of the largest stress parts in rotary kiln equipment, is generally arranged at the position close to the baffle wheel and the riding wheel, and is connected with the cylinder body by adopting a welded spring plate or a pin shaft type spring plate, so that the gear and the gearbox can be protected by a buffer effect. ZG45# is adopted as the material, and ZG35CrMo and ZG42CrMo are selected in a small number, and the normalizing temperature is 850-900 ℃, and the furnace is discharged for air cooling. Tempering temperature is 680-700 ℃, discharging and air cooling, and the hardness of the finished product is not lower than HB170. The casting processing strictly meets the national standard, the casting blank has no cracks, and the surface has no obvious casting defects such as air holes, sand holes and the like.
When the rotary kiln gear wheel rotates, lubricating grease in the rotary kiln gear wheel can drip on the gear cover outside the gear wheel, and oil leakage is easy to occur due to gaps between the gear cover and the gear wheel, so that gaps between the rotary kiln gear wheel and the gear cover are usually required to be sealed, and oil leakage is prevented. At present, a sealing mode of a gear ring sealing ring and a felt sealing mode is often adopted to seal lubricating grease in the gear ring sealing ring. However, the large gear ring stretches along with the kiln body due to thermal expansion, the stretching amount of the large gear ring is > +/-100 mm, the temperature of the gear ring sealing ring exceeds 100 ℃, and the roundness deviation of the gear ring sealing ring is affected by thermal expansion and cold contraction > +/-10 mm, so that the sealing effect of a conventional sealing mode is poor, and grease leakage occurs in some cases.
In addition, the rotary kiln big gear is generally in an open-air working condition, and water inflow needs to be prevented in rainy days and the like, so that higher requirements are put forward on sealing of the rotary kiln big gear.
Disclosure of Invention
The utility model provides a sealing device for a rotary kiln big gear, which can seal the rotary kiln big gear, has simple structure and good sealing performance, can prevent oil leakage and water inflow, and has long service life and lower manufacturing cost.
The technical scheme adopted for achieving the purposes of the utility model is as follows:
a rotary kiln bull gear sealing device installed between a gear cover and a bull gear, the bull gear being located inside the gear cover, the bull gear being rotated relative to the gear cover, the sealing device comprising:
the section of the movable ring is in a C shape, the movable ring is fixedly connected to the outer side of the large gear, the opening of the movable ring faces to one side far away from the large gear, and the movable ring synchronously rotates along with the large gear;
the section of the stationary ring is in a C shape, the stationary ring is fixedly connected to the gear cover, an opening of the stationary ring faces to one side close to the large gear, and the stationary ring and the movable ring are alternately inserted, so that a tortuous sealing cavity is formed between the large gear and the gear cover;
the movable ring and the stationary ring are distributed with guide rings which are arranged along the radial direction in a staggered way.
The movable ring comprises a first movable sealing ring arranged along the radial direction, a second movable sealing ring and a third movable sealing ring arranged along the axial direction, and the first movable sealing ring, the second movable sealing ring and the third movable sealing ring are connected into an integrated structure; the static ring comprises a first static sealing ring arranged along the radial direction, a second static sealing ring and a third static sealing ring arranged along the axial direction, and the first static sealing ring, the second static sealing ring and the third static sealing ring are connected into an integrated structure; the second movable sealing ring, the third movable sealing ring, the second static sealing ring and the third static sealing ring are alternately inserted;
the inner circular surface and the outer circular surface of one end, far away from the bull gear, of the second movable sealing ring and the third movable sealing ring are respectively provided with a diversion ring; and the inner circular surface and the outer circular surface of one end, close to the bull gear, of the second static sealing ring and the third static sealing ring are also provided with guide rings.
The movable ring is fixedly connected to the outer side of the large gear through a supporting ring, the supporting ring is coaxially and fixedly arranged on the outer side of the large gear, and the first movable sealing ring is fixedly attached to the side wall of the supporting ring.
The stationary ring is fixedly connected to the gear cover through an L-shaped bracket, the whole L-shaped bracket is annular and comprises a first bracket arranged along the radial direction and a second bracket arranged along the axial direction, the first bracket and the second bracket are fixedly connected into a whole, and the second bracket is connected to the inner circular surface of the first bracket; the first support is fixed on the outer side wall of the gear cover in an abutting mode, the second static sealing ring is installed on the inner circular surface of the second support in an abutting mode, and the third static sealing ring is inserted between the second movable sealing ring and the third movable sealing ring.
And one end of the second static sealing ring and the third static sealing ring, which is close to the large gear, extends to and is close to the large gear.
The bottom of the second static sealing ring and the second bracket are provided with a through oil return groove.
Compared with the prior art, the sealing device provided by the utility model has the following advantages: 1. the sealing device provided by the utility model has a simple structure, the labyrinth sealing cavity is formed by alternately inserting the movable ring and the static ring, and meanwhile, the radially arranged guide rings are distributed on the movable ring and the static ring to further seal the large gear, so that the sealing effect is good, and the leakage of internal grease and the entering of external water can be prevented. 2. In the utility model, labyrinth seals are arranged among the movable ring, the static ring and the guide ring, so that even if the rotation of the large gear deflects in the working process, the sealing effect can be ensured, and the deflection resistance is good. 3. According to the utility model, the movable ring is fixed on the large gear through the support ring, the stationary ring is fixed on the gear cover through the L-shaped bracket, the connection is stable and reliable, the service life is long, and the manufacturing cost is low.
Drawings
FIG. 1 is a schematic diagram of a rotary kiln big gear sealing device provided by the utility model;
in the figure: 1-gear cover, 2-large gear, 31-first movable sealing ring, 32-second movable sealing ring, 33-third movable sealing ring, 4-support ring, 51-first static sealing ring, 52-second static sealing ring, 53-third static sealing ring, 6-L-shaped bracket, 7-sealing cavity, 8-guide ring and 9-oil return groove.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The rotary kiln large gear sealing device provided by the utility model is arranged between a gear cover 1 and a large gear 2 as shown in figure 1, the large gear is positioned in the gear cover, the large gear rotates relative to the gear cover, and the sealing device comprises a movable ring and a stationary ring in the embodiment.
The section of the movable ring is in a C shape, the movable ring is fixedly connected to the outer side of the large gear, the opening of the movable ring faces to one side far away from the large gear, and the movable ring synchronously rotates along with the large gear. Specifically, the movable ring comprises a first movable sealing ring 31 arranged along the radial direction, a second movable sealing ring 32 arranged along the axial direction and a third movable sealing ring 33, and the three are connected into an integrated structure. The movable ring is fixedly connected to the outer side of the large gear through a supporting ring 4, the supporting ring is coaxially and fixedly arranged on the outer side of the large gear, and the first movable sealing ring is fixedly attached to the side wall of the supporting ring.
The section of the stationary ring is C-shaped, the stationary ring is fixedly connected to the gear cover, and the opening of the stationary ring faces to one side close to the large gear. Specifically, the stationary ring includes a first stationary seal ring 51 disposed along a radial direction, and a second stationary seal ring 52 and a third stationary seal ring 53 disposed along an axial direction, which are connected as an integral structure. The stationary ring is fixedly connected to the gear cover through an L-shaped bracket 6, the whole L-shaped bracket is annular and comprises a first bracket arranged along the radial direction and a second bracket arranged along the axial direction, the first bracket and the second bracket are fixedly connected into a whole, and the second bracket is connected to the inner circular surface of the first bracket; the first support is fixed on the outer side wall of the gear cover in an abutting mode, the second static sealing ring is installed on the inner circular surface of the second support in an abutting mode, and the third static sealing ring is inserted between the second movable sealing ring and the third movable sealing ring, namely the second movable sealing ring, the third movable sealing ring, the second static sealing ring and the third static sealing ring are inserted in an alternating mode, and therefore a tortuous sealing cavity 7 is formed between the large gear and the gear cover. A labyrinth seal is formed between the movable ring and the stationary ring to seal the lubricating grease inside and the water outside.
In the embodiment, guide rings 8 arranged in the radial direction are distributed on the movable ring and the stationary ring in a staggered manner, and specifically, guide rings are arranged on the inner circular surface and the outer circular surface of one end, far away from the large gear, of the second movable sealing ring and the third movable sealing ring; the inner circular surface and the outer circular surface of the end, close to the large gear, of the second static sealing ring and the third static sealing ring are also provided with guide rings, the guide rings are used for further sealing the sealing cavity, the lubricating grease inside the sealing cavity is further ensured not to leak, and the outside water cannot enter the gear cover and the large gear. Further, one end of the second static sealing ring and the third static sealing ring, which is close to the large gear, extend to and are close to the large gear, and the inner part and the outer part of the gear cover are sealed, so that the sealing effect is good.
In this embodiment, the bottom of the second static sealing ring and the second support are provided with a through oil return groove 9 for timely discharging the waste oil.
Claims (6)
1. The utility model provides a rotary kiln gear wheel sealing device installs between gear cover and gear wheel, the gear wheel is located the inside of gear cover, and the gear wheel is rotatory for the gear cover, its characterized in that: the sealing device comprises:
the section of the movable ring is in a C shape, the movable ring is fixedly connected to the outer side of the large gear, the opening of the movable ring faces to one side far away from the large gear, and the movable ring synchronously rotates along with the large gear;
the section of the stationary ring is in a C shape, the stationary ring is fixedly connected to the gear cover, an opening of the stationary ring faces to one side close to the large gear, and the stationary ring and the movable ring are alternately inserted, so that a tortuous sealing cavity is formed between the large gear and the gear cover;
the movable ring and the stationary ring are distributed with guide rings which are arranged along the radial direction in a staggered way.
2. The rotary kiln bull gear sealing arrangement as in claim 1 wherein: the movable ring comprises a first movable sealing ring arranged along the radial direction, a second movable sealing ring and a third movable sealing ring arranged along the axial direction, and the first movable sealing ring, the second movable sealing ring and the third movable sealing ring are connected into an integrated structure; the static ring comprises a first static sealing ring arranged along the radial direction, a second static sealing ring and a third static sealing ring arranged along the axial direction, and the first static sealing ring, the second static sealing ring and the third static sealing ring are connected into an integrated structure; the second movable sealing ring, the third movable sealing ring, the second static sealing ring and the third static sealing ring are alternately inserted;
the inner circular surface and the outer circular surface of one end, far away from the bull gear, of the second movable sealing ring and the third movable sealing ring are respectively provided with a diversion ring; and the inner circular surface and the outer circular surface of one end, close to the bull gear, of the second static sealing ring and the third static sealing ring are also provided with guide rings.
3. The rotary kiln bull gear sealing arrangement as set forth in claim 2 wherein: the movable ring is fixedly connected to the outer side of the large gear through a supporting ring, the supporting ring is coaxially and fixedly arranged on the outer side of the large gear, and the first movable sealing ring is fixedly attached to the side wall of the supporting ring.
4. The rotary kiln bull gear sealing arrangement as set forth in claim 2 wherein: the stationary ring is fixedly connected to the gear cover through an L-shaped bracket, the whole L-shaped bracket is annular and comprises a first bracket arranged along the radial direction and a second bracket arranged along the axial direction, the first bracket and the second bracket are fixedly connected into a whole, and the second bracket is connected to the inner circular surface of the first bracket; the first support is fixed on the outer side wall of the gear cover in an abutting mode, the second static sealing ring is installed on the inner circular surface of the second support in an abutting mode, and the third static sealing ring is inserted between the second movable sealing ring and the third movable sealing ring.
5. The rotary kiln bull gear sealing arrangement as in claim 4 wherein: and one end of the second static sealing ring and the third static sealing ring, which is close to the large gear, extends to and is close to the large gear.
6. The rotary kiln bull gear sealing arrangement as in claim 4 wherein: and a through oil return groove is arranged at the bottom of the second static sealing ring and on the second support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223260000.4U CN219176916U (en) | 2022-12-06 | 2022-12-06 | Rotary kiln gear wheel sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223260000.4U CN219176916U (en) | 2022-12-06 | 2022-12-06 | Rotary kiln gear wheel sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219176916U true CN219176916U (en) | 2023-06-13 |
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ID=86660801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223260000.4U Active CN219176916U (en) | 2022-12-06 | 2022-12-06 | Rotary kiln gear wheel sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219176916U (en) |
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2022
- 2022-12-06 CN CN202223260000.4U patent/CN219176916U/en active Active
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