CN219702227U - Device for reducing dynamic and static gap abrasion and air leakage of air ring of medium-speed coal mill - Google Patents
Device for reducing dynamic and static gap abrasion and air leakage of air ring of medium-speed coal mill Download PDFInfo
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- CN219702227U CN219702227U CN202320959000.9U CN202320959000U CN219702227U CN 219702227 U CN219702227 U CN 219702227U CN 202320959000 U CN202320959000 U CN 202320959000U CN 219702227 U CN219702227 U CN 219702227U
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- 230000003068 static effect Effects 0.000 title claims abstract description 55
- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000005299 abrasion Methods 0.000 title abstract description 16
- 238000003466 welding Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 13
- 238000009991 scouring Methods 0.000 abstract description 5
- 239000004575 stone Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The utility model discloses a device for reducing abrasion and air leakage of a wind ring dynamic and static gap of a medium-speed coal mill, which comprises a moving ring and a static ring, wherein a wind ring dynamic and static gap is arranged between the moving ring and the static ring, and a plurality of first annular table bodies and second annular table bodies which are arranged at intervals and are connected end to end are arranged above the wind ring dynamic and static gap; the upper part of the first annular table body is provided with a lining plate, and the outer side of the lining plate is fixedly connected with a guiding device. According to the utility model, the first annular table body and the second annular table body are arranged above the dynamic and static gaps of the wind ring, the pulverized coal particles carried after grinding in the grinding bowl flow in the coal mill, and the first annular table body and the second annular table body above the dynamic and static gaps of the wind ring block the pulverized coal particles from scouring the dynamic and static gaps of the wind ring, so that the phenomenon of increasing the dynamic and static gaps caused by abrasion is effectively relieved, the outflow of primary air from the dynamic and static gaps is reduced, and the problem of insufficient air quantity at the outlet of the wind ring caused by air leakage of the dynamic and static gaps is solved.
Description
Technical Field
The utility model relates to the technical field of coal mills, in particular to a device for reducing abrasion and air leakage of a dynamic clearance and a static clearance of a wind ring of a medium-speed coal mill.
Background
The medium speed coal mill has the advantages of high safety, quick start and easy adjustment, and is widely applied to large thermal power units in China, and the performance of the medium speed coal mill directly influences the stability and the economy of a boiler system. After long-time operation powder preparation, coal powder particles scour the wind ring dynamic and static gaps for a long time, so that abrasion is caused, the wind ring dynamic and static gaps are increased, the horizontal airflow flowing out of the dynamic and static gaps influences the airflow structure of the wind ring outlet, and the supporting capacity of primary wind on stone coal is reduced. The increase of the dynamic and static gaps of the wind ring can also lead to the increase of air leakage at the wind ring, the reduction of the carrying capacity of the air flow, the primary air is insufficient to support the pebble coal, the pebble coal falls into the primary air chamber, the discharge amount of the pebble coal is increased, the output of the coal mill is reduced, and the economical efficiency of the medium-speed coal mill is seriously affected.
Based on the above situation, the utility model provides a device for reducing the abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium-speed coal mill, which can effectively solve the problems.
Disclosure of Invention
The utility model aims to provide a device for reducing abrasion and air leakage of a dynamic clearance and a static clearance of a wind ring of a medium-speed coal mill. According to the device for reducing the abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium-speed coal mill, the first annular table body and the second annular table body are arranged above the dynamic and static gaps of the wind ring, the pulverized coal particles carried after grinding of the grinding bowl flow in the coal mill, the first annular table body and the second annular table body above the dynamic and static gaps of the wind ring block the scouring of the dynamic and static gaps of the wind ring by the pulverized coal particles, the phenomenon of increasing the dynamic and static gaps caused by abrasion is effectively relieved, the primary air flows out from the dynamic and static gaps, the problem of insufficient air quantity at the outlet of the wind ring caused by air leakage of the dynamic and static gaps is solved, the carrying capacity of the primary air on the pulverized coal particles is improved, and the stone coal discharge amount of the coal mill is prevented from increasing after the coal mill runs for a long time.
The utility model is realized by the following technical scheme:
the device for reducing abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium-speed coal mill comprises a movable ring and a static ring, wherein the dynamic and static gaps of the wind ring are arranged between the movable ring and the static ring, and a plurality of first annular table bodies and second annular table bodies which are arranged at intervals and are connected end to end are arranged above the dynamic and static gaps of the wind ring; the upper part of the first annular table body is provided with a lining plate, and the outer side of the lining plate is fixedly connected with a guiding device.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the inner ring of the moving ring is provided with a grinding bowl.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the first annular table body is fixedly connected with the lining plate through welding.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the second annular table body is fixedly connected with the stationary ring through welding.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the first annular table body and the second annular table body are both provided with three.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the materials of the first annular table body and the second annular table body are high wear-resistant alloy steel.
Compared with the prior art, the utility model has the following advantages:
according to the device for reducing the abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium-speed coal mill, the first annular table body and the second annular table body are arranged above the dynamic and static gaps of the wind ring, the pulverized coal particles carried after grinding of the grinding bowl flow in the coal mill, the first annular table body and the second annular table body above the dynamic and static gaps of the wind ring block the scouring of the dynamic and static gaps of the wind ring by the pulverized coal particles, the phenomenon of increasing the dynamic and static gaps caused by abrasion is effectively relieved, the primary air flows out from the dynamic and static gaps, the problem of insufficient air quantity at the outlet of the wind ring caused by air leakage of the dynamic and static gaps is solved, the carrying capacity of the primary air on the pulverized coal particles is improved, and the stone coal discharge amount of the coal mill is prevented from increasing after the coal mill runs for a long time.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic view of the assembly structure of the first annular table and the second annular table of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
Example 1:
the device for reducing abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium-speed coal mill comprises a movable ring 1 and a static ring 2, wherein a dynamic and static gap 3 of the wind ring is arranged between the movable ring 1 and the static ring 2, and a plurality of first annular table bodies 4 and second annular table bodies 5 which are arranged at intervals and are connected end to end are arranged above the dynamic and static gap 3 of the wind ring; a lining plate 6 is arranged above the first annular table body 4, and a guiding device 7 is fixedly connected to the outer side of the lining plate 6. The inner ring of the movable ring 1 is provided with a grinding bowl 8.
According to the utility model, the first annular table body 4 and the second annular table body 5 are arranged above the wind ring dynamic-static gap 3, pulverized coal particles carried after grinding of the grinding bowl 8 flow in the coal mill, the first annular table body 4 and the second annular table body 5 above the wind ring dynamic-static gap 3 block the pulverized coal particles from scouring the wind ring dynamic-static gap, so that the phenomenon of increasing the dynamic-static gap caused by abrasion is effectively relieved, the primary air flows out from the wind ring dynamic-static gap, the problem of insufficient air quantity at the wind ring outlet caused by air leakage of the dynamic-static gap is solved, the carrying capacity of the primary air on the pulverized coal particles is improved, and the stone coal discharge amount is prevented from increasing after the coal mill runs for a long time.
Further, in another embodiment, the first annular table body 4 is fixedly connected to the lining plate 6 by welding.
Further, in another embodiment, the second annular table body 5 is fixedly connected to the stationary ring 2 by welding.
Further, in another embodiment, the first annular table body 4 and the second annular table body 5 are each provided with three.
Further, in another embodiment, the materials of the first annular table body 4 and the second annular table body 5 are high wear-resistant alloy steel. The high wear-resistant alloy steel is adopted, so that the service life of the high wear-resistant alloy steel is ensured, and the effects of blocking the scouring of pulverized coal particles and reducing air leakage are provided for a long time.
According to the description of the utility model and the accompanying drawings, a device for reducing the abrasion and air leakage of the dynamic and static gaps of the wind ring of the medium speed coal mill can be easily manufactured or used by a person skilled in the art, and can produce the positive effects described by the utility model.
Unless specifically stated otherwise, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the positional relationship indicated is based on the positional relationship indicated in the drawings, and is merely for convenience of describing the present utility model and simplifying the description, and it is not necessary to indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationship in the present utility model are merely for exemplary illustration and should not be construed as limitations of the present patent, and it is possible for those skilled in the art to understand the specific meaning of the above terms in conjunction with the drawings and according to the specific circumstances.
Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" herein are to be construed broadly, e.g., they may be fixed, removable, or integral; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (6)
1. The utility model provides a reduce device of medium speed coal pulverizer wind ring dynamic and static clearance wearing and tearing air leakage which characterized in that: the device comprises a movable ring (1) and a static ring (2), wherein a wind ring dynamic and static gap (3) is arranged between the movable ring (1) and the static ring (2), and a plurality of first annular table bodies (4) and second annular table bodies (5) which are arranged at intervals and are connected end to end are arranged above the wind ring dynamic and static gap (3); a lining plate (6) is arranged above the first annular table body (4), and a guiding device (7) is fixedly connected to the outer side of the lining plate (6).
2. The device for reducing dynamic and static gap wear and air leakage of the air ring of the medium speed coal mill according to claim 1, wherein the device comprises: the inner ring of the movable ring (1) is provided with a grinding bowl (8).
3. The device for reducing dynamic and static gap wear and air leakage of the air ring of the medium speed coal mill according to claim 1, wherein the device comprises: the first annular table body (4) is fixedly connected with the lining plate (6) through welding.
4. The device for reducing dynamic and static gap wear and air leakage of the air ring of the medium speed coal mill according to claim 1, wherein the device comprises: the second annular table body (5) is fixedly connected with the stationary ring (2) through welding.
5. The device for reducing dynamic and static gap wear and air leakage of the air ring of the medium speed coal mill according to claim 1, wherein the device comprises: the first annular table body (4) and the second annular table body (5) are respectively provided with three.
6. The device for reducing dynamic and static gap wear and air leakage of the air ring of the medium speed coal mill according to claim 1, wherein the device comprises: the first annular table body (4) and the second annular table body (5) are made of high-wear-resistance alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320959000.9U CN219702227U (en) | 2023-04-23 | 2023-04-23 | Device for reducing dynamic and static gap abrasion and air leakage of air ring of medium-speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320959000.9U CN219702227U (en) | 2023-04-23 | 2023-04-23 | Device for reducing dynamic and static gap abrasion and air leakage of air ring of medium-speed coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219702227U true CN219702227U (en) | 2023-09-19 |
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ID=87980993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320959000.9U Active CN219702227U (en) | 2023-04-23 | 2023-04-23 | Device for reducing dynamic and static gap abrasion and air leakage of air ring of medium-speed coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219702227U (en) |
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2023
- 2023-04-23 CN CN202320959000.9U patent/CN219702227U/en active Active
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