CN114177999A

CN114177999A - Fine grinding machine

Info

Publication number: CN114177999A
Application number: CN202111314246.2A
Authority: CN
Inventors: 王实朴; 张红顺; 李小炯; 苏鑫; 蔡鹏�; 石亮; 王志星; 裘星; 蔡洪涛; 孙亭勋; 崔豫泓; 何红兴; 张保华; 魏琰荣; 刘振宇; 张鑫; 杜伯犀; 刘刚; 王诗珺; 徐大宝
Original assignee: China Coal Research Institute Ccri Energy Saving Technology Co ltd
Current assignee: China Coal Research Institute Ccri Energy Saving Technology Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-15

Abstract

The invention discloses a fine grinding machine, comprising: horizontal barrel, grinding component and seal assembly. The horizontal cylinder body is provided with a first end and a second end, the first end of the horizontal cylinder body is provided with a mounting hole, a feed inlet and a discharge outlet are arranged at intervals along the axial direction of the horizontal cylinder body, the grinding assembly comprises a driving part, a cantilever shaft and a grinding disc, the cantilever shaft is connected with the driving part, the cantilever shaft penetrates through the mounting hole and is pivotally connected with the first end of the horizontal cylinder body, the grinding disc is located in the horizontal cylinder body and is arranged on the cantilever shaft, the sealing assembly comprises a first sealing seat, a first shaft sleeve and a packing layer, the first shaft sleeve is arranged on the cantilever shaft, the first sealing seat is sleeved on the first shaft sleeve and is abutted against the inner wall of the mounting hole, and the packing layer is arranged between the first sealing seat and the first shaft sleeve. The fine grinding machine has a good sealing effect.

Description

Fine grinding machine

Technical Field

The invention relates to the technical field of coal slurry grinding, in particular to a fine grinding machine.

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 sealing 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 fine grinding machine with a good sealing effect.

A fine grinding machine according to an embodiment of the present invention includes: the horizontal type barrel is provided with a first end and a second end, the first end of the horizontal type barrel is provided with a mounting hole, and the horizontal type barrel is provided with a feeding hole and a discharging hole at intervals along the axial direction of the horizontal type barrel; the grinding assembly comprises a driving part, a cantilever shaft and a grinding disc, the cantilever shaft is connected with the driving part, the cantilever shaft penetrates through the mounting hole and is pivotally connected with the first end of the horizontal cylinder, and the grinding disc is positioned in the horizontal cylinder and is arranged on the cantilever shaft; the sealing assembly comprises a first sealing seat, a first shaft sleeve and a packing layer, the first shaft sleeve is sleeved on the cantilever shaft, the first sealing seat is sleeved on the first shaft sleeve and abutted against the inner wall of the mounting hole, and the packing layer is arranged between the first sealing seat and the first shaft sleeve.

According to the fine grinding machine provided by the embodiment of the invention, the first sealing seat, the first shaft sleeve and the packing layer are arranged at the pivot position between the cantilever shaft and the horizontal cylinder body, so that the problem of leakage of grinding media or grinding slurry from the pivot position between the cantilever shaft and the horizontal cylinder body can be avoided, the seal effect of the pivot position between the cantilever shaft and the horizontal cylinder body is better, and the service life is longer.

In some embodiments, the packing layer includes a plurality of packing elements, the plurality of packing elements are arranged along the axial direction of the cantilever shaft, the sealing assembly further includes a liquid seal ring, the liquid seal ring is disposed between two adjacent packing elements, the first seal seat is provided with a liquid injection port, and the liquid injection port is communicated with the liquid seal ring.

In some embodiments, an annular groove is formed in the inner wall of the first sealing seat, a liquid seal cavity is defined among the annular groove, the packing unit and the first shaft sleeve, and the liquid seal ring is arranged in the liquid seal cavity.

In some embodiments, the seal assembly further includes a gland abutting the packing layer, the gland being coupled to the first seal seat by an adjustment member for adjusting the pressure between the gland and the packing layer.

In some embodiments, the seal assembly further includes a first seal ring disposed between the first seal seat and the first bushing, and the first seal ring is located on a side of the packing layer facing away from the packing gland.

In some embodiments, the seal assembly further includes a second seal seat, the second seal seat is sleeved on the cantilever shaft and located in the horizontal cylinder, one end of the second seal seat abuts against the grinding disc, and the other end of the second seal seat abuts against the first shaft sleeve.

In some embodiments, the seal assembly further comprises a second seal ring, an annular cavity is defined between the second seal seat and the cantilever shaft, the second seal ring is arranged in the annular cavity, and the first shaft sleeve is abutted.

In some embodiments, a face of the second seal holder adjacent the mounting hole has an included angle α with a face orthogonal to an axial direction of the mounting hole, wherein α is 5 ° or more and 15 ° or less.

In some embodiments, the grinding disc is provided with a shaft hole and a hollow hole, the axis of the shaft hole coincides with the axis of the grinding disc, the hollow hole has a first wall surface and a second wall surface, the first wall surface and the second wall surface are opposite and spaced along the circumferential direction of the grinding disc, and in a cross section orthogonal to the axial direction of the grinding disc, the curvature radius of the projection of the first wall surface is greater than the curvature radius of the projection of the second wall surface.

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 arranged opposite to each other 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 the third wall surface and the fourth wall surface are both arc-shaped surfaces protruding in a direction away from the rotation center of the grinding disc.

Drawings

FIG. 1 is a schematic view of a refiner of an embodiment of the present invention.

FIG. 2 is a sectional view of a refiner of an embodiment of the present invention.

FIG. 3 is a schematic view of a part of the structure of a fine grinding machine according to an embodiment of the present invention.

FIG. 4 is a partial schematic view of a refiner of an embodiment of the present invention.

Fig. 5 is an enlarged view of a in fig. 4.

FIG. 6 is a schematic view of a grinding disk of a refiner of an embodiment of the present invention.

Reference numerals:

1. a horizontal cylinder; 11. mounting holes; 12. a feed inlet; 13. a discharge port;

2. a grinding assembly; 21. a drive member; 22. a cantilever shaft; 23. a grinding disk; 231. a shaft hole; 232. hollowing out holes; 2321. a first wall surface; 2322. a second wall surface; 2323. a third wall surface; 2324. a fourth wall surface;

3. a seal assembly; 31. a first seal seat; 311. a ring groove; 312. a liquid seal cavity; 32. a first bushing; 33. a filler layer; 331. a filler unit; 34. liquid seal ring; 35. a packing gland; 36. an adjustment member; 37. a first seal ring; 38. a second seal seat; 381. an annular cavity; 39. and a second seal ring.

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.

A fine grinding machine according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 6, a fine grinding machine according to an embodiment of the present invention includes: horizontal barrel 1, grinding component 2 and seal assembly 3. The horizontal cylinder 1 has a first end and a second end, the first end of the horizontal cylinder 1 (as shown in fig. 2, the left end of the horizontal cylinder 1) is provided with a mounting hole 11, and the horizontal cylinder 1 is provided with a feeding hole 12 and a discharging hole 13 at intervals along the axial direction thereof. The grinding assembly 2 comprises a driving part 21, a cantilever shaft 22 and a grinding disc 23, the cantilever shaft 22 is connected with the driving part 21, the cantilever shaft 22 passes through the mounting hole 11 and is pivotally connected with the first end of the horizontal cylinder 1, and the grinding disc 23 is positioned in the horizontal cylinder 1 and is arranged on the cantilever shaft 22. The sealing assembly 3 includes a first sealing seat 31, a first shaft sleeve 32 and a packing layer 33, the first shaft sleeve 32 is sleeved on the cantilever shaft 22, the first sealing seat 31 is sleeved on the first shaft sleeve 32 and is abutted against the inner wall of the mounting hole 11, and the packing layer 33 is disposed between the first sealing seat 31 and the first shaft sleeve 32.

According to the fine grinding machine provided by the embodiment of the invention, the first sealing seat 31, the first shaft sleeve 32 and the packing layer 33 are arranged at the pivot position between the cantilever shaft 22 and the horizontal cylinder 1, so that the problem of leakage of grinding media or grinding slurry from the pivot position between the cantilever shaft 22 and the horizontal cylinder 1 can be avoided, the pivot position between the cantilever shaft 22 and the horizontal cylinder 1 has a good sealing effect, and the service life is long.

Further, as shown in fig. 4 and 5, the packing layer 33 includes a plurality of packing units 331, the plurality of packing units 331 are sequentially arranged along an axial direction of the cantilever shaft 22 (e.g., a left-right direction of the cantilever shaft 22 in fig. 4), the sealing assembly 3 further includes a liquid seal ring 34, the liquid seal ring 34 is disposed between two adjacent packing units 331, and the first sealing seat 31 is provided with a liquid injection port, which is communicated with the liquid seal ring 34. It is understood that the filler unit 331 may be made of asbestos fabric, carbon fiber, rubber, flexible graphite, engineering plastic, etc. In addition, in the refiner of the embodiment of the invention, the liquid seal ring 34 is arranged between the two adjacent packing units 331, and liquid can be injected into the liquid seal ring 34 through the liquid injection port, so that the sealing effect of the pivot position between the cantilever shaft 22 of the refiner and the horizontal cylinder 1 is further improved, and the service life is prolonged. Specifically, the inner wall and the outer wall of the liquid seal ring 34 are both provided with grooves, high-pressure liquid enters the grooves of the liquid seal ring 34 from the liquid injection port, and a water pump externally connected with the liquid injection port drives the high-pressure liquid to form a high-pressure water ring at the position of the liquid seal ring 34, so that material leakage at the pivoting position between the cantilever shaft 22 and the horizontal cylinder 1 is prevented, the sealing effect of the fine grinding machine is improved, and the cooling and lubricating effects on the packing unit 331 can be achieved.

Further, as shown in fig. 4 and 5, the inner wall of the first seal seat 31 is provided with a ring groove 311, a liquid seal cavity 312 is defined between the ring groove 311, the packing unit 331 and the first shaft sleeve 32, and the liquid seal ring 34 is disposed in the liquid seal cavity 312.

In some embodiments, as shown in fig. 4, the seal assembly 3 further includes a gland 35, the gland 35 abutting the packing layer 33, the gland 35 being connected to the first seal housing 31 by an adjuster 36, the adjuster 36 being used to adjust the pressure between the gland 35 and the packing layer 33. For example, the adjustment member 36 may be a bolt. It can be understood that, when the packing layer 33 is worn to cause poor sealing effect between the first sealing seat 31 and the first shaft sleeve 32, an operator can rotate the adjusting member 36 to squeeze the packing layer 33, so that the packing layer 33 is tensioned, thereby prolonging the service life of the sealing assembly 3.

Further, as shown in fig. 3 to 5, the sealing assembly 3 further includes a first sealing ring 37, the first sealing ring 37 is disposed between the first sealing seat 31 and the first shaft sleeve 32, and the first sealing ring 37 is located on a side of the packing layer 33 facing away from the packing gland 35. It is understood that the first sealing ring 37 may be a plurality of first sealing rings 37, and a plurality of first sealing rings 37 are sequentially arranged along the length direction of the first shaft sleeve 32, for example, the first sealing ring 37 may be a rubber ring. The pulverizer of the embodiment of the invention can primarily block the material leaked from the pivot position between the cantilever shaft 22 and the horizontal cylinder 1 by arranging the plurality of first sealing rings 37, thereby further improving the sealing effect of the sealing assembly 3.

In some embodiments, as shown in fig. 3 and 4, the sealing assembly 3 further includes a second sealing seat 38, the second sealing seat 38 is disposed on the cantilever shaft 22 and located inside the horizontal cylinder 1, one end of the second sealing seat 38 (e.g., the left end of the second sealing seat 38 in fig. 4) abuts against the grinding disc 23, and the other end of the second sealing seat 38 (e.g., the right end of the second sealing seat 38 in fig. 4) abuts against the first shaft sleeve 32. Specifically, the seal assembly 3 further includes a second seal ring 39, an annular cavity 381 is defined between the second seal seat 38 and the cantilever shaft 22, and the second seal ring 39 is disposed in the annular cavity 381 and abutted against the first sleeve 32. In the fine grinding machine of the embodiment of the invention, the second sealing seat 38 and the second sealing ring 39 are arranged between the grinding disc 23 and the first shaft sleeve 32, so that the material flowing into the filler layer 33 can be blocked preliminarily, and the sealing performance of the whole fine grinding machine is improved.

Alternatively, as shown in FIG. 4, the second seal holder 38 has an angle α between a face adjacent to the mounting hole 11 and a face orthogonal to the axial direction of the mounting hole 11, wherein α is 5 ° or more and 15 ° or less. It can be understood that the right end face of the second sealing seat 38 and the inner wall face of the first end of the horizontal cylinder 1 form an included angle α. Through experimental research, the inventor of the present application finds that, when the cantilever shaft 22 drives the second seal holder 38 to rotate, because an included angle α is formed between one surface of the second seal holder 38 adjacent to the mounting hole 11 and one surface orthogonal to the axial direction of the mounting hole 11, the material between the second seal holder 38 and the first shaft sleeve 32 can be thrown out along the right end surface of the second seal holder 38 by the centrifugal force of the second seal holder 38, and then the probability of leakage of the material from the gap between the second seal holder 38 and the first shaft sleeve 32 is reduced, and the sealing effect of the fine grinding machine is improved. Further, the inventor found through experimental study that the sealing effect of the sealing assembly 3 of the refiner of the embodiment of the present invention is better when the included angle α is satisfied, 5 ° ≦ α ≦ 15 °. For example, when α is 5 °, 10 °, 15 °, the sealing performance of the seal assembly 3 is better.

In some embodiments, as shown in fig. 6, a hollow hole 232 and a shaft hole 231 are formed in the grinding disc 23, the cantilever shaft 22 passes through the shaft hole 231, an axis of the shaft hole 231 coincides with an axis of the grinding disc 23, the hollow hole 232 has a first wall surface 2321 and a second wall surface 2322, and the first wall surface 2321 and the second wall surface 2322 are opposite to each other and are arranged at intervals along a circumferential direction of the grinding disc 23. In a cross section orthogonal to the axial direction of the grinding disc 23, the projection of the first wall surface 2321 and the projection of the second wall surface 2322 are both arc-shaped, and the radius of curvature of the projection of the first wall surface 2321 is larger than the radius of curvature of the projection of the second wall surface 2322.

According to the fine grinding machine provided by the embodiment of the invention, as the first wall surface 2321 and the second wall surface 2322 are arranged oppositely and at intervals along the circumferential direction of the grinding disc 23, when the grinding disc 23 rotates, the first wall surface 2321 of the hollow hole 232 enters the material before the second wall surface 2322, and the projected curvature radius of the first wall surface 2321 is larger than that of the second wall surface 2322, so that the speed of the material flowing out of the hollow hole 232 is larger than that of the material entering the hollow hole 232, 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. 6, in a cross section orthogonal to the axial direction of the grinding disk 23, the projection of the first wall surface 2321 is a circular arc surface, and/or the projection of the second wall surface 2322 is a circular arc surface. Alternatively, only the first wall surface 2321 is an arc surface, and alternatively, only the second wall surface 2322 is an arc surface.

Preferably, the first wall 2321 and the second wall 2322 are both arc surfaces. It can be understood that the first wall surface 2321 and the second wall surface 2322 both have a constant curvature radius, so that the speed of the coal water slurry and the grinding medium entering the hollow hole 232 and flowing out of the hollow hole 232 is uniform, which is beneficial to improving the grinding effect of the coal water slurry, and the first wall surface 2321 and the second wall surface 2322 are both arc surfaces, so that the structural design of the hollow hole 232 is reasonable, and the processing and manufacturing of the hollow hole 232 are convenient.

In some embodiments, as shown in fig. 6, the hollow-out hole 232 further has a third wall surface 2323 and a fourth wall surface 2324, the third wall surface 2323 and the fourth wall surface 2324 are arranged oppositely and spaced apart in the radial direction of the abrasive disk 23, the third wall surface 2323 is closer to the rotation center of the abrasive disk 23 than the fourth wall surface 2324, and the third wall surface 2323 and the fourth wall surface 2324 are both arc-shaped surfaces that are convex in a direction away from the rotation center of the abrasive disk 23. It is understood that the first wall 2321, the third wall 2323, the second wall 2322 and the fourth wall 2324 are connected end to enclose the inner wall of the hollow hole 232. The fine grinding machine of the embodiment of the present invention can further improve the grinding effect of the grinding disk 23 by providing the third wall surface 2323 and the fourth wall surface 2324 as arc-shaped surfaces that are convex toward a direction away from the rotation center of the grinding disk 23.

Further, as shown in fig. 6, a plurality of hollow holes 232 are provided, and at least some of the plurality of hollow holes 232 are uniformly and alternately arranged along the axis of the shaft hole 231. For example, the number of the hollow holes 232 is three, and the three hollow holes 232 are uniformly and alternately arranged along the axis of the shaft hole 231. According to the fine grinding machine provided by the embodiment of the invention, the plurality of uniformly arranged hollow holes 232 are arranged, so that the distribution of the grinding media in the grinding cylinder is more uniform, and the grinding effect of the grinding disc 23 is further improved.

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

1. A refiner, characterized in that it comprises:

the horizontal type barrel is provided with a first end and a second end, the first end of the horizontal type barrel is provided with a mounting hole, and the horizontal type barrel is provided with a feeding hole and a discharging hole at intervals along the axial direction of the horizontal type barrel;

the grinding assembly comprises a driving part, a cantilever shaft and a grinding disc, the cantilever shaft is connected with the driving part, the cantilever shaft penetrates through the mounting hole and is pivotally connected with the first end of the horizontal cylinder, and the grinding disc is positioned in the horizontal cylinder and is arranged on the cantilever shaft;

the sealing assembly comprises a first sealing seat, a first shaft sleeve and a packing layer, the first shaft sleeve is sleeved on the cantilever shaft, the first sealing seat is sleeved on the first shaft sleeve and abutted against the inner wall of the mounting hole, and the packing layer is arranged between the first sealing seat and the first shaft sleeve.

2. The refiner of claim 1 wherein the packing layer includes a plurality of packing elements arranged along the axial direction of the cantilever shaft, the seal assembly further includes a liquid seal ring disposed between two adjacent packing elements, and the first seal seat is provided with a liquid injection port communicated with the liquid seal ring.

3. A pulverizer as claimed in claim 2, wherein the inner wall of the first seal seat is provided with an annular groove, a liquid seal cavity is defined among the annular groove, the packing unit and the first shaft sleeve, and the liquid seal ring is arranged in the liquid seal cavity.

4. A refiner as defined in claim 1 wherein the seal assembly further includes a packing gland abutting the packing layer, the packing gland being connected to the first seal seat by an adjuster for adjusting the pressure between the packing gland and the packing layer.

5. A refiner as defined in claim 4 wherein the seal assembly further includes a first seal ring disposed between the first seal seat and the first bushing, and the first seal ring is located on a side of the packing layer facing away from the packing gland.

6. The refiner of claim 1 wherein the seal assembly further comprises a second seal seat, the second seal seat is sleeved on the cantilever shaft and located in the horizontal cylinder, one end of the second seal seat is abutted with the grinding disc, and the other end of the second seal seat is abutted with the first shaft sleeve.

7. A refiner as claimed in claim 6, wherein the seal assembly further comprises a second seal ring, the second seal seat and the cantilevered shaft defining an annular cavity therebetween, the second seal ring being disposed in the annular cavity and the first sleeve abutting.

8. A refiner as claimed in claim 6, wherein the face of the second seal holder adjacent to the mounting hole has an angle α with a face orthogonal to the axial direction of the mounting hole, wherein α is 5 ° or more and 15 ° or less.

9. The refiner of any one of claims 1 to 8, wherein the grinding disc is provided with a shaft hole and a hollowed hole, an axis of the shaft hole coincides with an axis of the grinding disc, the hollowed hole has a first wall surface and a second wall surface, the first wall surface and the second wall surface are opposite and spaced along a circumferential direction of the grinding disc, and a projected curvature radius of the first wall surface is larger than a projected curvature radius of the second wall surface in a cross section orthogonal to an axial direction of the grinding disc.

10. The refiner of claim 9, said hollowed-out hole further having a third wall surface and a fourth wall surface, said third wall surface and said fourth wall surface being oppositely disposed in a radial direction of said abrasive disc, said third wall surface being adjacent to a center of rotation of said abrasive disc compared to said fourth wall surface, said third wall surface and said fourth wall surface each being an arc-shaped surface that is convex in a direction away from the center of rotation of said abrasive disc.