CN114178004A - Grinding disc and horizontal fine grinding machine with same - Google Patents
Grinding disc and horizontal fine grinding machine with same Download PDFInfo
- Publication number
- CN114178004A CN114178004A CN202111315758.0A CN202111315758A CN114178004A CN 114178004 A CN114178004 A CN 114178004A CN 202111315758 A CN202111315758 A CN 202111315758A CN 114178004 A CN114178004 A CN 114178004A
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- wall
- wall surface
- grinding
- disc
- grinding disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
Abstract
The invention discloses a grinding disc and a horizontal type fine grinding machine with the same, wherein the grinding disc is provided with a shaft hole and a hollow hole, the axis of the shaft hole is superposed with the axis of the grinding disc, the hollow hole is provided with a first wall surface and a second wall surface, the first wall surface and the second wall surface are opposite and arranged at intervals along the circumferential direction of the grinding disc, in a cross section orthogonal to the axial direction of the grinding disc, the projection of the first wall surface and the projection of the second wall surface are both arc-shaped, and the curvature radius of the projection of the first wall surface is larger than that of the projection of the second wall surface. The grinding disc has the advantages of good grinding effect and high production efficiency.
Description
Technical Field
The invention relates to the technical field of coal slurry grinding, in particular to a grinding disc and a horizontal fine grinding machine with the same.
Background
The coal water slurry is a coal-based liquid fuel and gasification raw material which are prepared by coal, water and additives according to a certain proportion, can be used for coal substitution and oil substitution combustion of industrial and power station boilers as the liquid fuel, can be used for coal water slurry gasification to prepare synthesis gas as the gasification raw material, and then is used for synthesizing chemical products such as ammonia, methanol, olefin, oil products, natural gas and the like through a subsequent process. The coal water slurry needs to be ground by a fine grinding machine in the preparation process, but the fine grinding machine in the related technology has poor grinding effect and low production efficiency.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides the grinding disc which is good in grinding effect and high in production efficiency.
The embodiment of the invention also provides a horizontal fine grinding machine.
According to the grinding disc provided by the embodiment of the invention, the grinding disc is provided with the shaft hole and the hollowed hole, the axis of the shaft hole is superposed with the axis of the grinding disc, the hollowed hole is provided with the first wall surface and the second wall surface, the first wall surface and the second wall surface are opposite and arranged at intervals along the circumferential direction of the grinding disc, in the cross section orthogonal to the axial direction of the grinding disc, the projection of the first wall surface and the projection of the second wall surface are both arc-shaped, and the curvature radius of the projection of the first wall surface is larger than that of the projection of the second wall surface.
According to the grinding disc provided by the embodiment of the invention, the first wall surface and the second wall surface are opposite and arranged at intervals along the circumferential direction of the grinding disc, so that when the grinding disc rotates, the first wall surface of the hollowed hole enters the material earlier than the second wall surface, and the projected curvature radius of the first wall surface is larger than that of the second wall surface, so that the speed of the material flowing out of the hollowed hole is larger than that of the material entering the hollowed hole, the stirring and mixing efficiency of the coal water slurry and the grinding medium is improved, the coal water slurry is ground more fully, and the production efficiency is higher.
In some embodiments, in a cross section orthogonal to the axial direction of the grinding disc, a projection of the first wall surface is a circular arc surface, and/or a projection of the second wall surface is a circular arc surface.
In some embodiments, in a cross section orthogonal to the axial direction of the grinding disc, a distance between the center of a circle on which the first wall surface is projected and the rotation center of the grinding disc is L1, and a distance between the center of a circle on which the second wall surface is projected and the rotation center of the grinding disc is L2, wherein L1 < L2.
In some embodiments, in a cross section orthogonal to the axial direction of the grinding disc, the radius of a circle on which the projection of the first wall surface is located is R1, the center of a circle on which the projection of the second wall surface is located is R2, wherein R2/R1 is more than or equal to 0.5 and less than or equal to 0.7.
In some embodiments, in a cross section orthogonal to the axial direction of the grinding disc, a connecting line between the center of a circle on which the first wall surface is projected and the rotation center of the grinding disc is a first connecting line, a connecting line between the center of a circle on which the second wall surface is projected and the rotation center of the grinding disc is a second connecting line, and an included angle between the first connecting line and the second connecting line is α, wherein α is 60 ° or more and 80 ° or less.
In some embodiments, the hollow hole further has a third wall surface and a fourth wall surface, the third wall surface and the fourth wall surface are opposite and spaced apart in a radial direction of the grinding disc, the third wall surface is closer to a rotation center of the grinding disc than the fourth wall surface, and both the third wall surface and the fourth wall surface are arc-shaped surfaces protruding in a direction away from the rotation center of the grinding disc.
In some embodiments, the plurality of hollow holes are arranged at intervals along the axis of the shaft hole.
In some embodiments, the shortest distance between two adjacent hollow holes is L3, the radius of the peripheral contour of the grinding disc is R3, wherein L3/R3 is 0.24 and 0.27.
In some embodiments, the outer circumferential surface of the abrasive disc is provided with a polyurethane layer.
A horizontal refiner according to another embodiment of the invention comprising a grinding disc according to any of the above embodiments.
According to the horizontal type fine grinding machine provided by the embodiment of the invention, the stirring and mixing efficiency of the coal water slurry and the grinding medium can be accelerated, so that the coal water slurry is ground more fully, and the production efficiency is higher.
Drawings
Fig. 1 is a schematic view of an abrasive disk according to an embodiment of the present invention.
Fig. 2 is a sectional view of an abrasive disk according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view a-a of fig. 1.
Reference numerals:
1. a grinding disk; 11. hollowing out holes; 111. a first wall surface; 112. a second wall surface; 113. a third wall surface; 114. a fourth wall surface; 12. and the shaft hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An abrasive disk and a horizontal type fine grinding machine having the same according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, according to the polishing disc 1 of the embodiment of the present invention, the polishing disc 1 is provided with a hollow hole 11 and a shaft hole 12, an axis of the shaft hole 12 coincides with an axis of the polishing disc 1, the hollow hole 11 has a first wall surface 111 and a second wall surface 112, and the first wall surface 111 and the second wall surface 112 are arranged opposite to each other and at an interval along a circumferential direction of the polishing disc 1. In a cross section orthogonal to the axial direction of the grinding disc 1, the projection of the first wall surface 111 and the projection of the second wall surface 112 are both arc-shaped, and the radius of curvature of the projection of the first wall surface 111 is larger than the radius of curvature of the projection of the second wall surface 112.
According to the grinding disc 1 of the embodiment of the invention, the first wall surface 111 and the second wall surface 112 are arranged oppositely and at intervals along the circumferential direction of the grinding disc 1, so that when the grinding disc 1 rotates, the first wall surface 111 of the hollow hole 11 enters the material earlier than the second wall surface 112, and the curvature radius of the projection of the first wall surface 111 is larger than that of the projection of the second wall surface 112, so that the speed of the material flowing out of the hollow hole 11 is larger than that of the material entering the hollow hole 11, the stirring and mixing efficiency of the coal water slurry and the grinding medium is increased, the coal water slurry is ground more fully, and the production efficiency is higher.
In some embodiments, as shown in fig. 1, in a cross section orthogonal to the axial direction of the grinding disk 1, the projection of the first wall surface 111 is a circular arc surface, and/or the projection of the second wall surface 112 is a circular arc surface. Alternatively, only the first wall surface 111 is an arc surface, and alternatively, only the second wall surface 112 is an arc surface.
Preferably, as shown in fig. 1, the first wall surface 111 and the second wall surface 112 are both arc surfaces. It can be understood that the first wall surface 111 and the second wall surface 112 both have a constant curvature radius, so that the speed of the coal water slurry and the grinding medium entering the hollow hole 11 and flowing out of the hollow hole 11 is uniform, which is beneficial to improving the grinding effect of the coal water slurry, and the first wall surface 111 and the second wall surface 112 are both arc surfaces, so that the structural design of the hollow hole 11 is reasonable, and the processing and manufacturing of the hollow hole 11 are convenient.
In some embodiments, as shown in fig. 1, in a cross section orthogonal to the axial direction of the grinding disc 1, a distance between the center of a circle on which the projection of the first wall surface 111 is located and the rotation center of the grinding disc 1 is L1, and a distance between the center of a circle on which the projection of the second wall surface 112 is located and the rotation center of the grinding disc 1 is L2, where L1 < L2. The inventor finds that when L1 is less than L2, the grinding effect of the coal water slurry can be further improved, and the production efficiency is higher.
Further, as shown in FIG. 1, in the cross section orthogonal to the axial direction of the grinding disk 1, the radius of the circle on which the projection of the first wall surface 111 is located is R1, and the radius of the circle on which the projection of the second wall surface 112 is located is R2, wherein R2/R1 is 0.5-0.7. Through experimental research, the inventor finds that when the ratio R2/R1 meets the ratio range, the stirring and mixing efficiency of the coal water slurry and the grinding medium can be further improved, so that the coal water slurry is ground more fully, and the production efficiency is higher. Alternatively, R2/R1 may be 0.5, 0.6, or 0.7. Preferably, when R2 is 40mm, R1 is 65mm, and R2/R1 are 0.6, the polishing effect of the polishing disk 1 is good.
In some embodiments, as shown in fig. 1, in a cross section orthogonal to the axial direction of the polishing disk 1, a line connecting the center of a circle on which the first wall surface 111 is projected and the rotation center of the polishing disk 1 is a first line, a line connecting the center of a circle on which the second wall surface 112 is projected and the rotation center of the polishing disk 1 is a second line, and an angle α between the first line and the second line is 60 ° or more and 80 ° or less. The inventor finds out through experimental research that when the included angle alpha meets the range of the ratio, the grinding disc 1 can be ensured to have higher structural strength, and the grinding effect of the grinding disc 1 can be ensured. Alternatively, α may be 60 °, 70 ° or 80 °, and preferably, α is 72 °, the grinding effect of the grinding disc 1 is better.
In some embodiments, as shown in FIG. 3, the axial direction of the holes 11 and the axial direction of the abrasive disk 1 form an angle β, wherein β is 0 ° ≦ 35 °. Because the included angle beta is formed between the axial direction of the hollow hole 11 and the axial direction of the grinding disc 1, when the grinding disc 1 rotates, the hollow hole 11 of the grinding disc 1 can further drive the coal water slurry and the grinding medium to rotate, so that the coal water slurry is ground more fully, and the production efficiency of the coal water slurry is improved.
It can be understood that, because the inner wall face of the hollowed-out hole 11 has a certain inclination angle, when the grinding disc 1 rotates, the inner wall face of the hollowed-out hole 11 can gradually push the coal water slurry and the grinding medium from the feed end of the grinding cylinder to the discharge end of the grinding cylinder, so that the grinding medium is uniformly distributed in the grinding cylinder, the problem that the grinding medium is locally accumulated in the grinding cylinder is avoided, and the coal water slurry can be sufficiently ground.
The inventor finds that the grinding effect of the grinding disc 1 is better when the included angle beta is more than or equal to 0 degrees and less than or equal to 35 degrees. Optionally, when the included angle α is 10 °, 20 °, 30 ° and 35 °, the grinding disc 1 has better grinding effect and the distribution of the grinding media in the grinding cylinder is more uniform.
In some embodiments, as shown in fig. 1, the hollow hole 11 further has a third wall 113 and a fourth wall 114, the third wall 113 and the fourth wall 114 are arranged opposite and spaced apart from each other in the radial direction of the grinding disc 1, the third wall 113 is closer to the rotation center of the grinding disc 1 than the fourth wall 114, and the third wall 113 and the fourth wall 114 are both arc-shaped surfaces protruding in the direction away from the rotation center of the grinding disc 1. It is understood that the first wall surface 111, the third wall surface 113, the second wall surface 112 and the fourth wall surface 114 are connected end to enclose the inner wall surface of the hollow hole 11. The polishing disk 1 of the embodiment of the present invention can further improve the polishing effect of the polishing disk 1 by providing the third wall surface 113 and the fourth wall surface 114 as arc-shaped surfaces that are convex toward a direction away from the rotation center of the polishing disk 1.
Further, as shown in fig. 1, the plurality of hollow holes 11 are provided, and at least some of the plurality of hollow holes 11 are uniformly and alternately arranged along the axis of the shaft hole 12. For example, the number of the hollow holes 11 is three, and the three hollow holes 11 are uniformly and alternately arranged along the axis of the shaft hole 12. According to the grinding disc 1 provided by the embodiment of the invention, the plurality of uniformly arranged hollow holes 11 are formed, so that the distribution of grinding media in the grinding cylinder is more uniform, and the grinding effect of the grinding disc 1 is further improved.
Optionally, as shown in fig. 1, the shortest distance between two adjacent hollow holes 11 is L3, and the radius of the outer peripheral profile of the grinding disc 1 is R3, wherein L3/R3 is 0.24 ≦ L3527. The inventor finds out through experimental study that when the L3/R3 satisfies the ratio range, the grinding disc 1 can have high structural strength, and the grinding effect of the grinding disc 1 can be ensured. Alternatively, the L3/R3 may be 0.24, 0.25, 0.26, 0.27, and preferably, the L3/R3 is 0.25, the structural strength of the abrasive disk 1 is high, and the abrasive effect is good.
In some embodiments, the outer circumferential surface of the grinding disc 1 is provided with a polyurethane layer (not shown), and it is understood that the polyurethane layer has certain elasticity, and when the grinding disc 1 rotates, the friction between the polyurethane layer and the grinding medium is further increased, so that the grinding medium can better rotate along with the rotation of the grinding disc 1, and the grinding effect of the grinding disc 1 is further improved.
The horizontal type fine grinding machine according to the embodiment of another aspect of the present invention includes the grinding disk 1 of the embodiment of the present invention. According to the horizontal type fine grinding machine provided by the embodiment of the invention, the stirring and mixing efficiency of the coal water slurry and the grinding medium can be accelerated, so that the coal water slurry is ground more fully, and the production efficiency is higher.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a grinding disk, its characterized in that, shaft hole and fretwork hole have been seted up on the grinding disk, the axis in shaft hole with the axis coincidence of grinding disk, the fretwork hole has first wall and second wall, first wall with the second wall is followed the circumference of grinding disk is relative and interval arrangement, in the quadrature in the axial cross section of grinding disk, the projection of first wall with the projection of second wall is the arc, just the radius of curvature of the projection of first wall is greater than the radius of curvature of the projection of second wall.
2. A grinding disc according to claim 1, characterized in that, in a cross-section orthogonal to the axial direction of the grinding disc, the projection of the first wall surface is a circular arc surface and/or the projection of the second wall surface is a circular arc surface.
3. The abrasive disc of claim 2, wherein, in a cross-section orthogonal to the axial direction of the abrasive disc, the distance between the center of the circle on which the first wall surface is projected and the rotation center of the abrasive disc is L1, and the distance between the center of the circle on which the second wall surface is projected and the rotation center of the abrasive disc is L2, wherein L1 < L2.
4. The grinding disc of claim 2, wherein in a cross section orthogonal to the axial direction of the grinding disc, the radius of a circle on which the first wall surface is projected is R1, and the center of a circle on which the second wall surface is projected is R2, wherein R2/R1 is 0.5-0.7.
5. An abrasive disc according to claim 2, characterized in that, in a cross-section orthogonal to the axial direction of the abrasive disc, the line connecting the centre of the circle on which the first wall surface is projected and the centre of rotation of the abrasive disc is a first line, the line connecting the centre of the circle on which the second wall surface is projected and the centre of rotation of the abrasive disc is a second line, the angle between the first line and the second line being α, wherein α is 60 ° or more and 80 ° or less.
6. The abrasive disc of claim 1, wherein the aperture further comprises a third wall and a fourth wall, the third wall and the fourth wall are opposite and spaced apart along a radial direction of the abrasive disc, the third wall is closer to a rotation center of the abrasive disc than the fourth wall, and the third wall and the fourth wall are both arc-shaped surfaces protruding away from the rotation center of the abrasive disc.
7. The grinding disc of claim 1, wherein the plurality of hollowed-out holes are arranged at intervals, and at least some of the hollowed-out holes are arranged uniformly along the axis of the shaft hole.
8. The grinding disc of claim 7, wherein the shortest distance between two adjacent hollowed-out holes is L3, the radius of the peripheral profile of the grinding disc is R3, wherein, L3/R3 is 0.24 ≦ L3527.
9. An abrasive disc according to any one of claims 1-8, characterized in that the outer circumferential surface of the abrasive disc is provided with a polyurethane layer.
10. A horizontal refiner comprising a grinding disc according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315758.0A CN114178004B (en) | 2021-11-08 | 2021-11-08 | Grinding disc and horizontal fine grinding machine with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315758.0A CN114178004B (en) | 2021-11-08 | 2021-11-08 | Grinding disc and horizontal fine grinding machine with same |
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| Publication Number | Publication Date |
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| CN114178004A true CN114178004A (en) | 2022-03-15 |
| CN114178004B CN114178004B (en) | 2023-04-07 |
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| CN114178004B (en) | 2023-04-07 |
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