CN220803417U - Wheel type grinding mechanism of coal mill - Google Patents
Wheel type grinding mechanism of coal mill Download PDFInfo
- Publication number
- CN220803417U CN220803417U CN202322572705.8U CN202322572705U CN220803417U CN 220803417 U CN220803417 U CN 220803417U CN 202322572705 U CN202322572705 U CN 202322572705U CN 220803417 U CN220803417 U CN 220803417U
- Authority
- CN
- China
- Prior art keywords
- roller
- grinding
- shaped
- roller sleeve
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000227 grinding Methods 0.000 title claims abstract description 111
- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000009434 installation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Crushing And Grinding (AREA)
Abstract
The wheel type grinding mechanism of the coal mill comprises a grinding roller part and a grinding disc part, wherein the grinding roller part comprises a roller frame, a fastening bolt, a wedge ring, a roller core and a roller sleeve, the roller sleeve is connected with the roller core and the wedge ring through the fastening bolt, and the roller sleeve is contacted with the wedge ring and the roller core in a wedging mode; the grinding disc part is provided with a whole circle of block liner bowls, and the plurality of liner bowls are spliced to form a U-shaped grinding area; the roller sleeve and the liner bowl form an initial state in a point contact mode; the utility model effectively improves the adaptability of the coal mill to materials, thereby improving the milling efficiency of the coal mill, prolonging the service life of the wear-resistant parts, and further enabling the grinding mechanism to be capable of realizing mass series design production, so that the wear-resistant parts have interchangeability and are convenient to overhaul and replace.
Description
Technical Field
The utility model belongs to the field of coal mill design and manufacture, and particularly relates to a wheel type grinding mechanism of a coal mill.
Background
The medium speed coal mill is of a tire wheel type, raw coal falls on a mill part through a central coal dropping pipe, centrifugal acting force is generated by rotation of the mill, the raw coal is separated from the mill and is diffused to a U-shaped grinding area of the mill, acting force of an oil cylinder is transmitted to a U-shaped grinding layer by a mill roller part, the raw coal is extruded between a roller sleeve of the mill roller part and a liner bowl of the mill roller part, the raw coal is ground and crushed into fine coal dust, and then the fine coal dust is separated.
The important components of the grinding area of the medium speed coal mill mainly comprise a grinding disc component and a grinding roller component, and the contour line type of the roller sleeve and the liner bowl influences the effective grinding area of the grinding area, thereby influencing the grinding efficiency, the slag discharge amount, the grinding power consumption and the like. The grinding part size can be determined through grinding the central diameter and the U-shaped arc central angle aiming at the coal mill with different models of the coal mill, and then the grinding mechanism is designed in series, so that the wear-resisting part has interchangeability and is convenient to overhaul and replace.
Disclosure of utility model
In order to solve the defects in the prior art, the utility model provides the wheel type grinding mechanism of the coal mill, which is used for realizing the serialization design of grinding parts, providing reliable basis for the serialization matching parts, and facilitating the maintenance and use of wear-resisting parts and the replacement.
The utility model adopts the following technical scheme.
The wheel type grinding mechanism of the coal mill comprises a grinding roller part and a grinding disc part, wherein the grinding roller part comprises a roller frame, a fastening bolt, a wedge ring, a roller core and a roller sleeve, the roller sleeve is connected with the roller core and the wedge ring through the fastening bolt, the roller sleeve is contacted with the wedge ring and the roller core in a wedging manner, and the roller sleeve is contacted and connected with the roller frame; the grinding disc part comprises a lining bowl, a whole circle of block lining bowls are arranged on the grinding disc part, and the plurality of lining bowls are spliced to form a U-shaped grinding area; the roller sleeve and the liner bowl form an initial state in a point contact mode.
Preferably, the roller sleeve is a tire type, and is hollow.
Preferably, the cross section of the lining bowl is U-shaped, the outside is high, the inside is low, the bottom surface is fan-shaped, the outside is wide, the inside is narrow, and a plurality of lining bowls are spliced into a whole circle of U-shaped grinding area.
Preferably, the roller frame is of a triangle-like structure, two sides of the roller sleeve are provided with wedge-shaped connecting surfaces with large outside and small inside, and the largest central section of the roller sleeve is in a key groove shape; the roller sleeve is self-conveyed along the center of the grinding roller shaft; the roller sleeve is configured such that the maximum cross-section key groove-shaped circular arc size is related to the grinding pitch diameter, the key groove-shaped circular arc diameter is D g＝0.78D0, wherein D 0 is the grinding pitch diameter, and the grinding pitch diameter is the diameter of a track circle formed by rotating a point where the roller sleeve is contacted with the liner bowl along the grinding center; the thickness of the roller sleeve is B g＝0.26D0;
Half of the central angle of an arc corresponding to the keyway-shaped arc of the roller sleeve is theta g, and the radius of the arc is R g＝0.13D0/Sinθg; the thickness of the wedge-shaped connecting surface of the roller sleeve is d g＝0.05D0; a half theta g＝3.6θ0 +/-4 degrees of the central angle of the U-shaped arc of the roller sleeve, wherein theta 0 is the installation inclination angle of the grinding roller; the installation inclination angle of the grinding roller component is theta 0; the wedge angle of the contact surface of the roller sleeve, the roller core and the wedge ring is equal to theta 0.
Preferably, the radius of the U-shaped arc of the liner bowl is R c＝0.15D0/Sinθg; the thickness of the U-shaped arc center of the liner bowl is delta c＝0.05D0; half of the central angle of the U-shaped arc of the liner bowl is θ c＝3.6θ0 +4 degrees; the center diameter of the liner bowl is D c0＝D0－0.3D0sinθ0/Sinθg.
Preferably, the two side surfaces of each liner bowl are provided with n-type boss structures.
Preferably, the bottom surface of the liner bowl is in a fan shape, the fan-shaped included angle is 30 degrees, and the height is high outside and low inside.
Preferably, an inclined plane is arranged on the inner arc surface of the liner bowl.
Preferably, the bottom surface of the lining bowl is provided with a U-shaped mounting and positioning hole.
Compared with the prior art, the utility model has the beneficial effects that the profile of the liner bowl and the roller sleeve is constructed based on the grinding pitch diameter of the coal mill, so that the coal mill forms different U-shaped grinding areas in different grinding pitch diameters, thereby matching different grinding forces, reasonably matching the area of the grinding areas, effectively improving the adaptability of the coal mill to materials, improving the grinding efficiency of the coal mill, prolonging the service life of the wear-resistant parts, and further enabling the grinding mechanism to be designed and produced in a large batch in series, so that the wear-resistant parts have interchangeability.
Drawings
FIG. 1 is a schematic view of a wheel grinding mechanism of a coal mill;
FIG. 2 is a schematic view of the structure of a roller housing in a wheel grinding mechanism of a coal mill;
FIG. 3 is a schematic view of a liner bowl in a wheel grinding mechanism of a coal mill;
FIG. 4 is a schematic top view of a U-shaped grinding section formed by split mounting of liner bowls of a coal pulverizer wheel grinding mechanism in accordance with the present utility model;
FIG. 5 is a schematic view of a coal pulverizer wheel grinding mechanism according to the present utility model installed in a coal pulverizer;
In the figure:
1-a roller sleeve; 2-lining bowl; 3-grinding roller parts; 4-grinding disc parts; 5-a roller frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments of the utility model are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are within the scope of the present utility model.
For a better understanding of the technical solutions of the present utility model, the following description refers to the present utility model in further detail.
As shown in fig. 1 and 5, the grinding mechanism of the coal mill of the present utility model comprises a grinding roller part 3 and a grinding disc part 4, wherein the grinding roller part 3 comprises a roller frame 5, a wedge ring, a compression bolt, a roller core and a roller sleeve 1, the grinding disc part 4 comprises a liner bowl 2, and the roller sleeve 1 and the liner bowl 2 form initial point contact. The two sides of the roller sleeve 1 are provided with wedge-shaped connecting surfaces with large outside and small inside, the largest central section of the roller sleeve is in a key groove shape, and the roller sleeve 1 can automatically transmit along the center of a grinding roller shaft.
As shown in fig. 1, in a preferred but non-limiting embodiment, the roll sleeve 1 is in the shape of a tire, and is hollow, the roll sleeve 1 is connected with the roll core and the wedge ring by fastening bolts, and the roll sleeve 1 is contacted with the wedge ring and the roll core in a wedging manner; the grinding disc component 4 is provided with a whole circle of block liner bowl 2, as shown in fig. 4, the liner bowl 2 is a block piece in a fan shape, the section of the liner bowl 2 is U-shaped, the outside is high and the inside is low, the outside is wide and the inside is narrow, the height is high and the inside is low, a plurality of liner bowls 2 are spliced in the grinding disc component 10 to form a U-shaped grinding area, and the grinding area of the U-shaped grinding area is related to the grinding pitch diameter. The bottom surface of the liner bowl (2) is in a fan shape, the fan-shaped included angle is 30 degrees, the height is high outside and low inside, and a plurality of liner bowls are spliced to form the U-shaped grinding area.
Fig. 2 shows a schematic view of the structure of the roller housing 1, wherein the contour of the roller housing 1 is formed as a function of the grinding pitch of the coal mill, wherein the grinding pitch is determined by the type of the coal mill. When the grinding pitch diameter of the coal mill is D 0, the roll sleeve 1 is structured such that the maximum section key groove-shaped circular arc size is related to the grinding pitch diameter, the grinding pitch diameter is the diameter of a track circle formed by rotating a point where the roll sleeve 1 contacts a liner bowl along the grinding center, the key groove-shaped circular arc diameter is D g＝0.78D0, and the thickness of the roll sleeve 1 is B g＝0.26D0; half of the central angle of an arc corresponding to the keyway-shaped arc of the roller sleeve 1 is theta g, and the radius of the arc is R g＝0.13D0/Sinθg; the thickness of the wedge-shaped connecting surface of the roller sleeve 1 is d g＝0.05D0; and the half theta g＝3.6θ0 +/-4 degrees of the central angle of the U-shaped arc of the roller sleeve 1, wherein theta 0 is the installation inclination angle of the grinding roller, and the wedge angle of the contact surface of the roller sleeve 1, the roller core and the wedge ring is equal to theta 0. The roller frame 5 is in contact connection with the roller sleeve 1, the roller frame 5 is used for supporting the roller sleeve 1 and transmitting loading force to the roller sleeve 1, and the roller frame 5 is of a triangle-like structure and is used for supporting the roller sleeve 1 and transmitting loading force to the roller sleeve. .
Fig. 3 shows a schematic structural diagram of a liner bowl 2, which is configured with a U-shaped arc radius R c＝0.15D0/Sinθg; the thickness of the center of the U-shaped arc of the liner bowl 2 is delta c＝0.05D0; half of the central angle of the U-shaped arc of the liner bowl 2 is theta c＝3.6θ0 +4 degrees; the center diameter of the liner bowl 2 is D c0＝D0－0.3D0sinθ0/Sinθg.
Fig. 4 shows a schematic view of the structure of the grinding area in the U shape formed by the split installation of the liner bowl 2. As shown in fig. 4, each two sides of each liner bowl 2 are provided with n-type boss structures, and when the liner bowl is installed in a whole circle, each liner bowl 2 is contacted with each n-type boss surface.
The inner arc surface of the liner bowl 2 is provided with an inclined plane. The bottom surface of the lining bowl is provided with a U-shaped installation positioning hole, so that the lining bowl is ensured not to deviate during installation.
When the wheel type grinding mechanism of the coal mill is used, the roller sleeve 1 is a part contacted with materials, the roller sleeve 1 rotates around the roller shaft of the grinding roller part 3 through friction force between the roller sleeve 1 and the materials and rotation of the grinding disc, a grinding area formed by a plurality of lining bowls 2 is a part for placing the materials, when the coal mill runs, the grinding disc part 4 containing the lining bowls 2 rotates, the materials paved in the grinding disc rotate along with the grinding disc, and the loading device applies loading force to the grinding roller part 3 to enable the grinding roller part 3 to grind and crush the materials.
The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model, and various modifications and variations of the present utility model will be apparent to those skilled in the art.
Compared with the prior art, the utility model has the beneficial effects that the profile of the liner bowl and the roller sleeve is constructed based on the grinding pitch diameter of the coal mill, so that the coal mill forms U-shaped grinding areas with different grinding areas in different grinding pitch diameters, thereby matching different grinding forces, reasonably matching the areas of the grinding areas, effectively improving the adaptability of the coal mill to materials, improving the grinding efficiency of the coal mill, prolonging the service life of the wear-resistant parts, and further enabling the grinding mechanism to be designed and produced in a large batch in series, so that the wear-resistant parts have interchangeability and are convenient to overhaul and replace.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the specific embodiments of the utility model without departing from the spirit and scope of the utility model, which is intended to be covered by the claims.
Claims (9)
1. The utility model provides a wheeled grinding mechanism of coal pulverizer, includes grinding roller part (3) and mill part (4), its characterized in that:
the grinding roller component (3) comprises a roller frame (5), a fastening bolt, a wedge ring, a roller core and a roller sleeve (1), wherein the roller sleeve (1) is connected with the roller core and the wedge ring through the fastening bolt, the roller sleeve (1) is contacted with the wedge ring and the roller core in a wedging manner, and the roller sleeve (1) is contacted and connected with the roller frame (5);
The grinding disc component (4) comprises a liner bowl (2), wherein the grinding disc component (4) is provided with a whole circle of block liner bowls (2), and a plurality of liner bowls (2) are spliced to form a U-shaped grinding area;
the roller sleeve (1) and the liner bowl (2) form an initial state in a point contact mode.
2. The coal pulverizer wheel grinding mechanism of claim 1, wherein:
The roller sleeve (1) is of a tire type, and is hollow.
3. The coal pulverizer wheel grinding mechanism of claim 1, wherein:
The cross section of the lining bowl (2) is U-shaped, the outside is high, the inside is low, the bottom surface is fan-shaped, the outside is wide, the inside is narrow, and a plurality of lining bowls (2) are spliced into a whole circle of U-shaped grinding area.
4. The coal pulverizer wheel grinding mechanism of any one of claims 1-2, wherein:
Wedge-shaped connecting surfaces with large outside and small inside are arranged on two sides of the roller sleeve (1), and the largest central section of the roller sleeve is in a key groove shape;
the roller sleeve (1) is self-conveyed along the center of the grinding roller shaft;
The roller sleeve (1) is constructed in such a way that the maximum cross-section key groove-shaped circular arc sizes are all related to the grinding pitch diameter, and the key groove-shaped circular arc diameter is D g＝0.78D0, wherein D 0 is the grinding pitch diameter, and the grinding pitch diameter is the diameter of a track circle formed by rotating a point where the roller sleeve (1) is contacted with a liner bowl along the grinding center;
The thickness of the roller sleeve (1) is B g＝0.26D0;
Half of the central angle of an arc corresponding to the key groove-shaped arc of the roller sleeve (1) is theta g, and the radius of the arc is R g＝0.13D0/Sinθg;
The thickness of the wedge-shaped connecting surface of the roller sleeve (1) is d g＝0.05D0;
A half theta g＝3.6θ0 +/-4 degrees of the central angle of the U-shaped arc of the roller sleeve (1), wherein theta 0 is the installation inclination angle of the grinding roller;
The installation inclination angle of the grinding roller component (3) is theta 0;
the wedge angle of the contact surface of the roller sleeve (1) contacted with the roller core and the wedge ring is equal to theta 0.
5. A coal pulverizer wheel grinding mechanism according to any one of claims 1 to 3, wherein:
The radius of the U-shaped arc formed by the liner bowl (2) is R c＝0.15D0/Sinθg;
The thickness of the U-shaped arc center of the liner bowl (2) is delta c＝0.05D0;
Half of the central angle of the U-shaped arc of the liner bowl (2) is theta c＝3.6θ0 +4 degrees;
The center diameter of the liner bowl (2) is D c0＝D0－0.3D0sinθ0/Sinθg.
6. A coal pulverizer wheel grinding mechanism according to claim 3, wherein:
and two sides of each liner bowl (2) are provided with n-type boss structures.
7. A coal pulverizer wheel grinding mechanism according to claim 3, wherein:
the bottom surface of the liner bowl (2) is in a fan shape, the fan-shaped included angle is 30 degrees, and the height is high outside and low inside.
8. A coal pulverizer wheel grinding mechanism according to claim 3, wherein:
an inclined plane is arranged on the inner arc surface of the liner bowl (2).
9. The coal pulverizer wheel grinding mechanism of claim 8, wherein: by a means of
The bottom surface of the liner bowl (2) is provided with a U-shaped mounting and positioning hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322572705.8U CN220803417U (en) | 2023-09-21 | 2023-09-21 | Wheel type grinding mechanism of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322572705.8U CN220803417U (en) | 2023-09-21 | 2023-09-21 | Wheel type grinding mechanism of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220803417U true CN220803417U (en) | 2024-04-19 |
Family
ID=90698365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322572705.8U Active CN220803417U (en) | 2023-09-21 | 2023-09-21 | Wheel type grinding mechanism of coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220803417U (en) |
-
2023
- 2023-09-21 CN CN202322572705.8U patent/CN220803417U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102935399B (en) | Centrifugal grinder | |
| CN220803417U (en) | Wheel type grinding mechanism of coal mill | |
| CN111774132B (en) | Eccentric assembly of multi-cylinder hydraulic cone crusher | |
| CN209828921U (en) | Optimized biomass flat-die granulation machine | |
| CN201380098Y (en) | Ball roller grinding machine | |
| CN210496660U (en) | Combined lining of ball mill | |
| CN2346536Y (en) | Kingpin convexity tumbling mill | |
| CN209526627U (en) | False watt of a kind of exciter rotor using roller supporting | |
| CN212765474U (en) | Aluminum wheel structure for preventing water accumulation and reducing cost | |
| CN220677938U (en) | Multi-cylinder cone crusher and moving cone anti-reversion device thereof | |
| US6824088B2 (en) | Roller mill | |
| CN220634597U (en) | Coal mill roller sleeve for ceramic integrated preform composite process | |
| CN116273276B (en) | Multi-cylinder cone crusher and movable cone assembly thereof | |
| CN201520537U (en) | Intermediate suspension bearing of conveyer screw shaft | |
| CN212758931U (en) | Mine ball mill | |
| CN204294311U (en) | The energy-conservation liner plate of a kind of ball mill | |
| CN205797385U (en) | A kind of energy-efficient liner plate of Novel asymmetric ladder | |
| CN218948847U (en) | Small swing frame of loader drive axle | |
| CN220634612U (en) | Horizontal ball mill | |
| CN205236068U (en) | Broken system of copper ashes | |
| CN215277710U (en) | Industrial super-wear-resistant OMSA lining plate | |
| CN221111381U (en) | Self-heat-preservation composite concrete block anti-smearing grinding wheel | |
| CN220277145U (en) | Raymond mill composite grinding roller | |
| CN216704534U (en) | Hard wear-resistant alloy roller sleeve for cement clinker roller crusher | |
| CN220969321U (en) | Horizontal impact mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |