CN214171323U - Novel coal mill sealing ring - Google Patents
Novel coal mill sealing ring Download PDFInfo
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- CN214171323U CN214171323U CN202120142817.8U CN202120142817U CN214171323U CN 214171323 U CN214171323 U CN 214171323U CN 202120142817 U CN202120142817 U CN 202120142817U CN 214171323 U CN214171323 U CN 214171323U
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- sealing ring
- sealing
- coal mill
- transmission shaft
- connecting flange
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Abstract
The utility model relates to a novel coal mill sealing ring, which belongs to the technical field of thermal power generation, and comprises a first sealing ring, a second sealing ring and a lower frame body which are sleeved outside a coal mill transmission shaft in sequence, wherein the inner side of the first sealing ring is provided with a carbon crystal ring which is tightly attached outside the coal mill transmission shaft in a sealing way, the second sealing ring is fixedly connected with the first sealing ring in a sealing way, and the lower frame body is fixedly connected with the second sealing ring in a sealing way; a circle of sealing sleeve is fixedly attached to the outer side of the second sealing ring, a connecting flange which is sleeved outside the coal mill transmission shaft and is fixedly connected with the coal mill transmission shaft is further arranged on the outer side of the second sealing ring, and gaps are reserved between the connecting flange and the outer side of the second sealing ring and between the connecting flange and the inner end of the sealing sleeve; the air inlet pipe is communicated with the sealed air chamber. The utility model discloses it is sealed effectual, reduced the wearing and tearing to the transmission shaft, and need not often change, reduced use cost.
Description
Technical Field
The utility model relates to a novel coal pulverizer sealing ring belongs to thermal power generation technical field.
Background
The coal pulverizer sealing ring problem of leaking out of power plant is puzzled each power plant always, and coal pulverizer sealing ring leaks out and can cause the scene raise dust serious, leads to personnel to be unable to be close to, influences daily the patrolling and examining. The existing coal mill sealing technology is that a secondary carbon fine sealing ring is designed outside a transmission shaft for lower sealing, and an upper seal is arranged between a primary air chamber and a sealing air chamber. Because the difference between the gap position of the upper seal dynamic and static parts and the height of the primary air chamber is small and the seal gap is large, the primary air with powder and fine particles of pebble coal easily enters the seal air chamber through the seal gap, the solid particles easily wear the transmission shaft under the action of seal air and gravity, the lower seal gap is enlarged after the wear is serious, the seal air leaks out, the differential pressure between the seal air chamber and the primary air chamber is reduced, and the powder and fine particles in the primary air chamber leak out through the upper seal, the seal air chamber and the lower seal.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the transmission shaft that current coal pulverizer sealing technique leads to and wear seriously, sealed amount of wind is big, pollute shortcoming such as serious, the utility model discloses a novel coal pulverizer sealing ring, its is sealed effectual, has reduced the wearing and tearing to the transmission shaft, and does not need often to change, has reduced use cost, can reduce sealed wind direction outward leakage simultaneously effectively.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel coal mill sealing ring comprises a first sealing ring, a second sealing ring and a lower frame body which are sleeved outside a coal mill transmission shaft in sequence, wherein the inner side of the first sealing ring is provided with at least three carbon crystal rings which are uniformly arranged along the axial direction and tightly attached to the outside of the coal mill transmission shaft in a sealing manner; a circle of sealing sleeve is fixedly attached to the outer side of the second sealing ring, a connecting flange which is sleeved outside the coal mill transmission shaft and is fixedly connected with the coal mill transmission shaft is further arranged on the outer side of the second sealing ring, and gaps are reserved between the connecting flange and the outer side of the second sealing ring and between the connecting flange and the inner end of the sealing sleeve; a sealing air chamber is formed among the transmission shaft of the coal mill, the first sealing ring, the second sealing ring and the connecting flange, and a primary air chamber is formed among the lower frame body, the second sealing ring and the connecting flange; the air inlet pipe is communicated with the sealed air chamber.
Furthermore, the second sealing ring is fixedly connected with the lower frame body in a sealing mode through a bottom flange sleeved outside the transmission shaft of the coal mill.
Further, the gap between the connecting flange and the outer side of the second sealing ring is 1.25-1.75 mm; the clearance between the connecting flange and the inner end of the sealing sleeve is 1 mm.
Further, the carbon crystal ring is provided with three.
Further, the connecting flange is fixedly connected with a transmission shaft of the coal mill through bolts.
Further, the seal cover is fixedly connected with the second seal ring through bolts.
Further, the first sealing ring and the second sealing ring are fixedly connected through bolts.
Compared with the prior art the utility model discloses there are following characteristics and beneficial effect: the sealing effect is improved by arranging the plurality of carbon crystal rings to seal the transmission shaft of the coal mill, the sealing wind can be effectively prevented from leaking outwards, and meanwhile, the air inlet pipe is used for ventilating the sealing wind chamber, so that the pressure difference between the sealing wind chamber and the primary wind chamber is more than 2kpa, the sealing wind is guided upwards, and hot wind and downward leaking dust in the coal mill are blocked; all the parts are connected through bolts, so that the disassembly is convenient, and the disassembly and assembly convenience is provided for later maintenance; the outer side of the second sealing ring is provided with a wear-resistant sleeve, so that powder slag extrusion is prevented, and abrasion to the second sealing ring is reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a partially enlarged schematic view at a of fig. 1.
Wherein the reference numerals are: 1. a coal mill transmission shaft; 2. a lower frame body; 3. a first seal ring; 31. a carbon crystal ring; 4. a second seal ring; 5. a bottom flange; 6. sealing sleeves; 7. a connecting flange; 8. an air inlet pipe; 9. Sealing the air chamber; 10. and a primary air chamber.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 2, the novel coal mill sealing ring of the embodiment includes a first sealing ring 3, a second sealing ring 4 and a lower frame body 2, which are sequentially sleeved outside a coal mill transmission shaft 1, wherein at least three carbon crystal rings 31 which are uniformly arranged along an axial direction and tightly attached to the outside of the coal mill transmission shaft 1 in a sealing manner are arranged on the inner side of the first sealing ring 3, the second sealing ring 4 is fixedly connected with the first sealing ring 3 in a sealing manner, and the lower frame body 2 is fixedly connected with the second sealing ring 4 in a sealing manner; a circle of sealing sleeve 6 is fixedly attached to the outer side of the second sealing ring 4, a connecting flange 7 which is sleeved outside the coal mill transmission shaft 1 and is fixedly connected with the coal mill transmission shaft 1 is further arranged on the outer side of the second sealing ring 4, and gaps are reserved between the connecting flange 7 and the outer side of the second sealing ring 4 and between the connecting flange and the inner end of the sealing sleeve 6; a sealing air chamber 9 is formed among the coal mill transmission shaft 1, the first sealing ring 3, the second sealing ring 4 and the connecting flange 7, and a primary air chamber 10 is formed among the lower frame body 2, the second sealing ring 4 and the connecting flange 7; and the air inlet pipe 8 is communicated with the sealed air chamber 9.
Further, the second sealing ring 4 is fixedly connected with the lower frame body 2 in a sealing manner through a bottom flange 5 sleeved outside the transmission shaft 1 of the coal mill.
Further, the gap between the connecting flange 7 and the outside of the second sealing ring 4 is 1.25-1.75 mm; the gap between the connecting flange 7 and the inner end of the sealing sleeve 6 is 1 mm.
Further, three carbon crystal rings 31 are provided.
Further, the connecting flange 7 is fixedly connected with the coal mill transmission shaft 1 through bolts.
Further, the sealing sleeve 6 is fixedly connected with the second sealing ring 4 through bolts.
Further, the first seal ring 3 and the second seal ring 4 are fixedly connected by bolts.
The utility model discloses a theory of operation: the coal mill transmission shaft 1 is sealed by arranging the plurality of carbon crystal rings 31, so that the sealing effect is improved, the sealing wind can be effectively prevented from leaking outwards, meanwhile, the air inlet pipe 8 is used for ventilating the sealing wind chamber 9, the pressure difference between the sealing wind chamber 9 and the primary wind chamber 10 is larger than 2kpa, the sealing wind is guided upwards, and hot wind and downward-leaking dust transmitted from the interior of the coal mill are blocked; all the parts are connected through bolts, so that the disassembly is convenient, and the disassembly and assembly convenience is provided for later maintenance; the sealing sleeve 6 arranged on the outer side of the second sealing ring 4 can prevent powder slag from being extruded, and reduces abrasion to the second sealing ring 4.
It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides a novel coal pulverizer sealing ring which characterized in that: the sealing device comprises a first sealing ring (3), a second sealing ring (4) and a lower frame body (2), wherein the first sealing ring (3), the second sealing ring (4) and the lower frame body (2) are sequentially sleeved outside a transmission shaft (1) of the coal mill outwards, at least three carbon crystal rings (31) which are uniformly arranged along the axial direction and tightly attached to the outside of the transmission shaft (1) of the coal mill in a sealing mode are arranged on the inner side of the first sealing ring (3), the second sealing ring (4) is fixedly connected with the first sealing ring (3) in a sealing mode, and the lower frame body (2) is fixedly connected with the second sealing ring (4) in a sealing mode; a circle of sealing sleeve (6) is fixedly attached to the outer side of the second sealing ring (4), a connecting flange (7) which is sleeved outside the coal mill transmission shaft (1) and is fixedly connected with the coal mill transmission shaft (1) is further arranged on the outer side of the second sealing ring (4), and gaps are reserved between the connecting flange (7) and the outer side of the second sealing ring (4) and between the connecting flange and the inner end of the sealing sleeve (6); a sealing air chamber (9) is formed among the coal mill transmission shaft (1), the first sealing ring (3), the second sealing ring (4) and the connecting flange (7), and a primary air chamber (10) is formed among the lower frame body (2), the second sealing ring (4) and the connecting flange (7); and the air inlet pipe (8) is communicated with the sealed air chamber (9).
2. The novel coal mill sealing ring of claim 1, characterized in that: the second sealing ring (4) is fixedly connected with the lower frame body (2) in a sealing way through a bottom flange (5) sleeved outside the transmission shaft (1) of the coal mill.
3. The novel coal mill sealing ring of claim 1, characterized in that: the clearance between the connecting flange (7) and the outer side of the second sealing ring (4) is 1.25-1.75 mm; the clearance between the connecting flange (7) and the inner end of the sealing sleeve (6) is 1 mm.
4. The novel coal mill sealing ring of claim 1, characterized in that: the number of the carbon crystal rings (31) is three.
5. The novel coal mill sealing ring of claim 1, characterized in that: the connecting flange (7) is fixedly connected with the coal mill transmission shaft (1) through bolts.
6. The novel coal mill sealing ring of claim 1, characterized in that: the sealing sleeve (6) is fixedly connected with the second sealing ring (4) through a bolt.
7. The novel coal mill sealing ring of claim 1, characterized in that: the first sealing ring (3) and the second sealing ring (4) are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142817.8U CN214171323U (en) | 2021-01-19 | 2021-01-19 | Novel coal mill sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142817.8U CN214171323U (en) | 2021-01-19 | 2021-01-19 | Novel coal mill sealing ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214171323U true CN214171323U (en) | 2021-09-10 |
Family
ID=77593581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120142817.8U Active CN214171323U (en) | 2021-01-19 | 2021-01-19 | Novel coal mill sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214171323U (en) |
-
2021
- 2021-01-19 CN CN202120142817.8U patent/CN214171323U/en active Active
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