CN210449380U - HP bowl type coal mill impeller device - Google Patents
HP bowl type coal mill impeller device Download PDFInfo
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- CN210449380U CN210449380U CN201920580798.XU CN201920580798U CN210449380U CN 210449380 U CN210449380 U CN 210449380U CN 201920580798 U CN201920580798 U CN 201920580798U CN 210449380 U CN210449380 U CN 210449380U
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Abstract
An impeller device of an HP bowl type coal mill comprises an inner ring (2), an outer ring (3), a group of guide vanes (4) and an air quantity adjusting assembly, wherein a fixing ring is arranged on the outer wall of the inner ring (2), the inner ring (2) is fixedly arranged on the grinding bowl (1), the outer side of the inner ring (2) is provided with the outer ring (3), a vane mounting area is formed between the outer wall of the inner ring (2) and the inner wall of the outer ring (3), the guide vanes (4) are provided with air quantity adjusting grooves (5), and the guide vanes (4) are obliquely arranged; the advantages are that: the discharge amount of the pebble coal of the coal mill is kept within 0.5%, the period is increased from 3 months to 10 months, and the period of the regular inspection is prolonged. Under the same working condition, the current of a single coal mill is reduced by 4-8A, the scheduled inspection construction period of the coal mill is reduced to 6 days from 15 days, the labor cost is saved, and the electric quantity loss caused by the scheduled inspection of the coal mill is reduced.
Description
Technical Field
The utility model relates to a coal pulverizer equipment field, concretely relates to HP bowl formula coal pulverizer impeller device.
Background
At present, the working principle of the HP bowl type coal mill is that coal blocks are milled and extruded by the relative motion of a grinding roller and a grinding bowl to be crushed, and the crushed coal blocks enter an impeller device area under the action of the rotating centrifugal force of the grinding bowl
The hot primary air entering the coal mill through the impeller device dries the coal powder and sends the coal powder to a separator at the upper part of the grinding area. After separation, the pulverized coal with a certain particle size is brought out along with the airflow and enters a hearth for combustion, and the pulverized coal with coarse particles returns to a grinding area for grinding again. Therefore, the condition of the impeller device directly influences the normal operation of the coal mill.
The impeller device of the existing coal mill is unreasonable in structural design, and a thicker throttling ring and a thicker adjusting ring are designed outside the impeller device, so that the rotating part of the coal mill has larger self weight, large running current and high power consumption of the coal mill.
The throttling ring and the adjusting ring which are designed outside the coal mill impeller device are in a welding type and are firmly welded with the blade and are not adjustable. In operation, parts of the impeller device are gradually abraded, so that the coal mill cannot keep high-efficiency working condition operation for a long period. The later stage overhauls the time and only can take whole secateing, and the mode of whole change, work load is too big, overhauls the period for a long time, brings high maintenance spare part purchasing expense and cost of labor, especially in the vigorous period of electric quantity demand, the coal pulverizer of overlength overhauls the time limit for a project, and frequent level checking seriously influences the unit load.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned not enough, and provide a HP bowl formula coal pulverizer impeller device.
The utility model comprises an inner ring, an outer ring, a group of guide vanes and an air quantity adjusting component,
the outer wall of the inner ring is provided with a fixed ring, the inner ring is fixedly arranged on the grinding bowl, the outer side of the inner ring is provided with an outer ring, a blade mounting area is formed between the outer wall of the inner ring and the inner wall of the outer ring, the guide vanes are provided with air volume adjusting grooves and are obliquely arranged, a group of guide vanes are annularly and uniformly distributed and fixedly arranged in the blade mounting area, the outer ring is positioned in the air volume adjusting grooves,
the air quantity adjusting component comprises an annular tray and a group of annular wind shields which are arranged on the coal mill body,
the cross-section of annular deep bead is for invering the L shape, and it has a set of waist hole to open on the annular deep bead, and a set of annular deep bead annular equipartition to pass waist hole detachable installation on annular tray through the bolt respectively, form the air regulation region between the outer wall of the inner wall of a set of annular deep bead and outer lane.
The anti-abrasion device is characterized by further comprising a first arc-shaped anti-abrasion plate and a second arc-shaped anti-abrasion plate, wherein the first arc-shaped anti-abrasion plate is fixedly arranged on the top surface of the fixed ring of the inner ring, and the second arc-shaped anti-abrasion plate is fixedly arranged on the top of the annular wind shield.
The group of annular wind deflectors is 6-8 annular plates.
The group of waist holes is 4-6 waist holes.
The coal mill is characterized by further comprising a group of distance adjusting screw rods, one ends of the distance adjusting screw rods are abutted to the outer wall of the annular wind shield, lead screw nuts matched with the distance adjusting screw rods are fixedly installed on the coal mill body, and the annular wind shield is pushed to move by rotating the distance adjusting screw rods.
The top surfaces of two ends of one annular wind deflector of the two adjacent annular wind deflectors are provided with grooves A, and the bottom surfaces of two ends of the other annular wind deflector are provided with grooves B matched with the grooves A for use.
The guide vane comprises a plug part and a socket part, wherein the bottom of the plug part is provided with a protrusion, the top of the socket part is provided with a groove matched with the protrusion for use, and the protrusion and the groove are in interference fit.
The distance between the outer ring and the fixing ring of the inner ring is 70-90 mm.
The distance between the outer ring and the annular wind shield is 3-6 mm.
The utility model has the advantages that: the discharge amount of the pebble coal of the coal mill is kept within 0.5%, the period is increased from 3 months to 10 months, and the period of the regular inspection is prolonged. Under the same working condition, the current of a single coal mill is reduced by 4-8A, the scheduled inspection construction period of the coal mill is reduced to 6 days from 15 days, the labor cost is saved, and the electric quantity loss caused by the scheduled inspection of the coal mill is reduced.
Description of the drawings
Fig. 1 is a schematic sectional structure diagram of the present invention.
Fig. 2 is a schematic view of the enlarged structure of fig. 1 according to the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a schematic structural view of the annular wind deflector of the present invention.
Fig. 5 is a schematic structural view of the guide vane of the present invention.
Detailed Description
As shown in the attached drawings, the utility model comprises an inner ring 2, an outer ring 3, a group of guide vanes 4 and an air volume adjusting component,
the outer wall of the inner ring 2 is provided with a fixed ring, the inner ring 2 is fixedly arranged on the grinding bowl 1, the outer side of the inner ring 2 is provided with an outer ring 3, a blade mounting area is formed between the outer wall of the inner ring 2 and the inner wall of the outer ring 3, the guide vanes 4 are provided with air volume adjusting grooves 5, the guide vanes 4 are obliquely arranged, a group of guide vanes 4 are annularly and uniformly distributed and fixedly arranged in the blade mounting area, the outer ring 3 is positioned in the air volume adjusting grooves 5,
the air quantity adjusting component comprises an annular tray 7 arranged on the coal mill body 6 and a group of annular wind shields 8,
the cross-section of the annular wind shield 8 is inverted L-shaped, a group of waist holes 9 are formed in the annular wind shield 8, the annular wind shield 8 is annularly and uniformly distributed and detachably mounted on the annular tray 7 by penetrating the waist holes 9 through bolts respectively, and an air volume adjusting area is formed between the inner wall of the annular wind shield 8 and the outer wall of the outer ring 3.
The wind shield also comprises a first arc-shaped wear-resistant plate 20 and a second arc-shaped wear-resistant plate 10, wherein the first arc-shaped wear-resistant plate 20 is fixedly arranged on the top surface of the fixed ring of the inner ring 2, and the second arc-shaped wear-resistant plate 10 is fixedly arranged on the top of the annular wind shield 8.
The group of annular wind deflectors 8 is 6-8 annular plates.
The group of waist holes 9 is 4-6 waist holes.
The coal mill is characterized by further comprising a group of distance adjusting screw rods 11, one ends of the distance adjusting screw rods 11 are abutted to the outer wall of the annular wind shield 8, lead screw nuts matched with the distance adjusting screw rods 11 are fixedly installed on the coal mill body 6, and the annular wind shield 8 is pushed to move by rotating the distance adjusting screw rods 11.
The top surfaces of two ends of one annular wind deflector 8 of the two adjacent annular wind deflectors 8 are provided with grooves A, and the bottom surfaces of two ends of the other annular wind deflector 8 are provided with grooves B matched with the grooves A for use.
The guide vane 4 comprises a plug part 12 and a socket part 13, wherein the bottom of the plug part 12 is provided with a protrusion 14, the top of the socket part 13 is provided with a groove 15 matched with the protrusion 13, and the protrusion 14 and the groove 15 are in interference fit.
The distance between the outer ring 3 and the fixing ring of the inner ring 2 is 70-90 mm.
The distance between the outer ring 3 and the annular wind shield 8 is 3-6 mm.
The working mode is as follows: during use, the grinding bowl 1 rotates to drive the inner ring 2, the group of guide vanes 4 and the outer ring 3 to rotate, coal blocks on the grinding bowl 1 are thrown out of the grinding bowl 1 under the action of centrifugal force after being ground, and primary air rectified by the group of guide vanes 4 blows ground coal powder to a separator on the upper portion for separation. The heavy pebble coal which is difficult to crush and cannot be blown up by primary wind, and the like, rapidly fall through a group of guide vanes 4 and are discharged out of the machine body.
The upper part of the guide vane 4 is easy to wear under the washing of the wind-powder mixture, and a worker can only replace the plug part 12 after the upper part is worn,
when the size of the air volume adjusting area needs to be adjusted, the bolt in the waist hole 9 can be loosened, and the annular wind shield 8 is pushed to move by rotating the distance adjusting screw rod 11 so as to change the size of the air volume adjusting area.
The guide vane 4 is in the shape of a kitchen knife, the socket part 13 is a knife body, and the plug part 12 is a knife handle.
The first arc-shaped wear plate 20 and the second arc-shaped wear plate 10 can protect relevant components from erosion and abrasion, and make airflow cluster to prevent coal dust from accumulating.
Claims (9)
1. An impeller device of an HP bowl type coal mill is characterized by comprising an inner ring (2), an outer ring (3), a group of guide vanes (4) and an air quantity adjusting component,
the outer wall of the inner ring (2) is provided with a fixed ring, the inner ring (2) is fixedly arranged on the grinding bowl (1), the outer side of the inner ring (2) is provided with an outer ring (3), a blade mounting area is formed between the outer wall of the inner ring (2) and the inner wall of the outer ring (3), the guide vanes (4) are provided with air volume adjusting grooves (5), the guide vanes (4) are obliquely arranged, a group of guide vanes (4) are annularly and uniformly distributed and fixedly arranged in the blade mounting area, the outer ring (3) is positioned in the air volume adjusting grooves (5),
the air quantity adjusting component comprises an annular tray (7) arranged on the coal mill body (6) and a group of annular wind shields (8),
the cross section of the annular wind shield (8) is inverted L-shaped, a group of waist holes (9) are formed in the annular wind shield (8), the annular wind shield (8) is annularly and uniformly distributed and detachably mounted on the annular tray (7) through the waist holes (9) which are respectively penetrated through bolts, and an air volume adjusting area is formed between the inner wall of the annular wind shield (8) and the outer wall of the outer ring (3).
2. The impeller device of the HP bowl mill according to claim 1, further comprising a first arcuate wear plate (20) and a second arcuate wear plate (10), the first arcuate wear plate (20) being fixedly mounted to the top surface of the stationary ring of the inner ring (2), the second arcuate wear plate (10) being fixedly mounted to the top of the annular wind deflector (8).
3. The HP bowl mill impeller device according to claim 1, characterised in that the set of annular wind deflectors (8) are 6-8 annular plates.
4. The HP bowl mill impeller device according to claim 1, characterised in that the set of kidney holes (9) is 4-6 kidney holes.
5. The HP bowl mill impeller device according to claim 1, characterized in that it further comprises a set of distance adjusting screws (11), one end of each distance adjusting screw (11) is abutted against the outer wall of the annular wind deflector (8), and a screw nut used in cooperation with the distance adjusting screw (11) is fixedly installed on the mill body (6), and the annular wind deflector (8) is pushed to move by rotating the distance adjusting screw (11).
6. The impeller device of the HP bowl coal mill according to claim 1, wherein the top surfaces of two ends of the annular wind deflector (8) of two adjacent annular wind deflectors (8) are provided with A grooves, and the bottom surfaces of two ends of the annular wind deflector (8) of the other annular wind deflector are provided with B grooves matched with the A grooves.
7. The HP bowl mill impeller device according to claim 1, wherein the guide vanes (4) comprise a plug portion (12) and a socket portion (13), the bottom of the plug portion (12) is provided with a protrusion (14), the top of the socket portion (13) is provided with a groove (15) used in cooperation with the protrusion (14), and the protrusion (14) and the groove (15) are in interference fit.
8. The impeller device of the HP bowl mill according to claim 1, characterized in that the distance between the outer ring (3) and the retaining ring of the inner ring (2) is 70-90 mm.
9. The impeller device of the HP bowl mill according to claim 1, wherein the distance between the outer ring (3) and the annular wind deflector (8) is 3-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920580798.XU CN210449380U (en) | 2019-04-26 | 2019-04-26 | HP bowl type coal mill impeller device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920580798.XU CN210449380U (en) | 2019-04-26 | 2019-04-26 | HP bowl type coal mill impeller device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210449380U true CN210449380U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920580798.XU Active CN210449380U (en) | 2019-04-26 | 2019-04-26 | HP bowl type coal mill impeller device |
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| CN (1) | CN210449380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518761A (en) * | 2022-10-13 | 2022-12-27 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
-
2019
- 2019-04-26 CN CN201920580798.XU patent/CN210449380U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518761A (en) * | 2022-10-13 | 2022-12-27 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
| CN115518761B (en) * | 2022-10-13 | 2024-04-16 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
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