CN219540499U - Dry-method energy-saving vertical grinding machine similar to truncated cone-shaped double-screw rotor - Google Patents

Abstract

The utility model relates to a dry energy-saving vertical grinder similar to a truncated cone-shaped double-screw rotor, which comprises a truncated cone-shaped double-screw rotor arranged on a rotating shaft, wherein the upper part of the double-screw rotor is small in diameter, the lower part of the double-screw rotor is large in diameter, and the double-screw rotor is shaped like a truncated cone when rotating, and comprises but is not limited to a truncated cone, a step, a hyperbola, a drum shape and the like; the rotating shaft is arranged in the grinding cavity, and grinding medium is filled in the grinding cavity; the grinding cavity is arranged in the shell. By adopting the truncated cone-like double-screw rotor, the angular velocity is the same, the edge linear velocity is gradually increased from top to bottom, and the output energy of the grinding medium is also gradually increased from top to bottom, so that the defect that the running velocity of the grinding medium at the edge of the grinding cavity of the cylindrical double-screw rotor structure is gradually reduced from top to bottom due to the action of gravity can be overcome, the rest area between the edge of the cylindrical double-screw rotor structure and the edge of the grinding cavity is eliminated, the grinding is more sufficient, and the efficiency is higher.

Description

Dry-method energy-saving vertical grinding machine similar to truncated cone-shaped double-screw rotor

Technical Field

The utility model relates to the technical field of vertical grinding machines, in particular to a dry energy-saving type vertical grinding machine similar to a truncated cone-shaped double-screw rotor.

Background

The industrial grinder is a traditional industrial basic device, is widely applied to industries such as mines, electric power, steel, cement, ceramics and the like, has a large quantity and wide range, is huge in equipment and consumes a large amount of energy. Industrial tube mills have not been fundamentally improved since the manufacture of tube mills by smith in 1882, denmark. The traditional industrial tube mill used in the industry has low efficiency, the energy consumption utilization rate is only 2-3%, and more than 95% of electric energy is converted into waste heat and noise.

The existing process equipment for grinding dry powder has the defects of a roller press (roller type vertical mill) combined tube mill and a roller type vertical mill system, the investment is high, the operation rate is low, the operation cost is high, the electricity consumption is high, the noise is high, the heavy metal pollution of the product is serious, and the particle morphology (circularity and length-diameter ratio) of the product is poor.

Moreover, most of the existing vertical grinding machines adopt wet grinding, and the spiral rotor is cylindrical, so that the following defects exist:

firstly, the running speed of grinding media at the edge of a grinding cavity of a cylindrical double-screw rotor structure is gradually reduced from top to bottom under the action of gravity;

second, there is a region of repose between the edge of the cylindrical double helical rotor structure and the edge of the grinding chamber.

In view of this, the present inventors have specifically devised a dry energy-saving type vertical grinder having a truncated cone-like double helical rotor, which is produced by this scheme.

Disclosure of Invention

First, the technical problem to be solved

In order to solve the problems in the prior art, the utility model provides a dry energy-saving type vertical grinding machine similar to a truncated cone-shaped double-screw rotor, which has more sufficient grinding and higher efficiency.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps: the dry energy-saving vertical grinder comprises a truncated cone-like double-screw rotor arranged on a rotating shaft, wherein the upper part of the double-screw rotor is small in diameter, the lower part of the double-screw rotor is large in diameter, and the double-screw rotor is shaped like a truncated cone when rotating;

the rotating shaft is arranged in the grinding cavity, and grinding medium is filled in the grinding cavity;

the grinding cavity is arranged in the shell.

(III) beneficial effects

The beneficial effects of the utility model are as follows: the vertical grinding machine adopts the double-screw rotor with the similar cone frustum structure, the angular speed of the screw rotor is the same, the linear speed of the edge is gradually increased from top to bottom, the output energy of grinding media is also gradually increased from top to bottom, the defect that the running speed of the grinding media at the edge of the grinding cavity of the cylindrical double-screw rotor structure is gradually reduced from top to bottom due to the action of gravity can be overcome, the rest area between the edge of the cylindrical double-screw rotor structure and the edge of the grinding cavity is eliminated, the grinding is more sufficient, and the efficiency is higher.

Drawings

FIG. 1 is a schematic view of the vertical mill of the present utility model;

fig. 2 is a front view of the vertical grinder of the present utility model;

FIG. 3 is a partial cross-sectional view of the vertical mill of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a longitudinal cross-sectional view of a frustoconical double helical rotor of the single bearing support structure of the present utility model;

FIG. 6 is a longitudinal cross-sectional view of a frustoconical double helical rotor of the double bearing support structure of the present utility model;

FIG. 7 is a longitudinal cross-sectional view of a frustoconical double helical rotor of the single bearing support structure of the present utility model;

FIG. 8 is a longitudinal cross-sectional view of a truncated cone-shaped double helical rotor of the double bearing support structure of the present utility model;

FIG. 9 is a longitudinal cross-sectional view of a stepped double helical rotor of the single bearing support structure of the present utility model;

FIG. 10 is a longitudinal cross-sectional view of a stepped double helical rotor of the double bearing support structure of the present utility model

FIG. 11 is a longitudinal cross-sectional view of a hyperbolic double helical rotor of the single bearing support structure of the utility model;

FIG. 12 is a longitudinal cross-sectional view of a hyperbolic double helical rotor of the double bearing support structure of the present utility model;

FIG. 13 is a longitudinal cross-sectional view of a drum double helical rotor of the single bearing support structure of the present utility model;

FIG. 14 is a longitudinal cross-sectional view of a drum double helical rotor of the double bearing support structure of the present utility model;

FIG. 15 is a first schematic view of a media rest region;

FIG. 16 is a second schematic view of a media rest region;

FIG. 17 is a longitudinal sectional view of a vertical mill according to a second embodiment of the utility model;

[ reference numerals description ]

10. A housing; 11. a feed inlet; 12. a dust collection port; 13. a discharge port; 14. a tuyere; 15. an opening; 17. a sieve plate; 20. a transmission device; 30. a rotating shaft; 40. a double-screw rotor; 50. an upper bearing; 60. a lower bearing; 70. an access door; 80. discharging grate; 81. a horizontal gap; 90. a base; 91. an access opening; 92. the rest area medium is subjected to a resultant force.

Detailed Description

The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings.

Example 1

Referring to fig. 1 to 16, a dry energy-saving vertical grinder with a truncated cone-like double-screw rotor 40 comprises a truncated cone-like double-screw rotor 40 arranged on a rotating shaft 30, wherein the double-screw rotor 40 has a small upper diameter and a large lower diameter, and is shaped like a truncated cone when rotating, and referring to fig. 5 to 14, the truncated cone comprises but is not limited to truncated cones, steps, hyperbolas, drums and the like; the angular velocity of the double helical rotors 40 at each position in the vertical direction is the same, the edge linear velocity gradually increases from top to bottom, and the grinding medium output energy gradually increases from top to bottom.

The rotating shaft 30 is arranged in a grinding cavity, and grinding medium is filled in the grinding cavity; the grinding cavity is arranged in the shell.

The screw rotor 40 is connected with the transmission device 20 through the rotating shaft 30, and as shown in fig. 5 to 14, the supporting mode adopts a single bearing type or a double bearing type, and the transmission device 20 can be a motor or a speed reducer;

the single bearing type is characterized in that an upper bearing is arranged at the top of the grinding cavity, the upper bearing is rotatably sleeved at the upper end of the rotating shaft, and the transmission device 20 is arranged at the top;

the double-bearing type grinding chamber is provided with an upper bearing and a lower bearing at the top and the bottom respectively, the upper bearing and the lower bearing are respectively rotatably sleeved at the upper end and the lower end of the rotating shaft, and the transmission device 20 can be respectively arranged at the top or the bottom.

The truncated cone-like double-screw rotor 40 can make up the defect that the running speed of grinding media at the edge of a grinding cavity of a cylindrical double-screw rotor structure is gradually reduced from top to bottom under the action of gravity, so that a rest area between the edge of the cylindrical double-screw rotor structure and the edge of the grinding cavity is eliminated, grinding is more complete, and efficiency is higher; preferably, the upper bearing 50 and the lower bearing 60 adopt rolling bearings, and the upper bearing 50 and the lower bearing 60 are respectively provided with a sealing structure, so that the protection effect on the two bearings is achieved, dust is prevented from entering, and the service life is prolonged.

The truncated cone-like double helical rotor 40 has a small upper diameter and a large lower diameter, and is shaped like a truncated cone when rotated, and as shown in fig. 5 to 14, different examples of the truncated cone-like double helical rotor 40 when rotated are shown, but are not limited to these examples, specifically, the height-diameter ratio H/d=0.8 to 1.5 of the truncated cone-like double helical rotor 40, where H is the height of the truncated cone-like double helical rotor 40, and D is the maximum diameter of the truncated cone-like double helical rotor 40. The running speed of the grinding medium at the edge of the grinding cavity gradually decreases from top to bottom due to the influence of gravity; the double-screw rotor with the conical-like structure has the advantages that the angular speed of the double-screw rotor is the same, the linear speed of the edge is gradually increased from top to bottom, the output energy of the grinding medium is also gradually increased from top to bottom, the defect that the running speed of the grinding medium at the edge of the grinding cavity of the cylindrical double-screw rotor structure is gradually reduced from top to bottom due to the action of gravity can be overcome, the rest area between the edge of the cylindrical double-screw rotor structure and the edge of the grinding cavity is eliminated, the grinding is more complete, and the efficiency is higher.

As shown in fig. 15 and 16, with the double helical rotor having a truncated cone-like structure, the rest area medium is subjected to a resultant force 92 which increases sequentially from top to bottom.

In the present embodiment, at least one opening 15 is provided on the side wall of the housing 10, and an access door 70 is provided at the opening 15; the upper part of the side wall of the shell 10 is provided with a feed port 11 and a dust collection port 12 which are communicated with the interior of the grinding cavity, the lower part of the side wall of the shell 10 is provided with a discharge port 13 which is communicated with the interior of the grinding cavity, and the lower end surface of the shell 10 is provided with a blast port 14 which is communicated with the interior of the grinding cavity.

In this embodiment, the grinding media are corundum. Wherein the corundum material is a nonmetallic material, so that the excessive heavy metal of the ground product can be avoided.

In this embodiment, referring to fig. 4, a discharge grate 80 is provided at the discharge opening 13, and the discharge grate 80 is provided with a plurality of horizontal gaps 81 arranged side by side at equal intervals. The horizontal gap 81 is between 2 and 6mm, and the discharge grate 80 realizes the rapid discharge of the ground materials and prevents the discharge of grinding media.

In the embodiment, the dust collection port 12 is connected with the dust collector, so that dust and heat generated in the grinding cavity in the grinding process can be conveniently treated by the dust collector, and the environment-friendly requirement is met; the blast orifice 14 is provided with screen plate 17 with casing 10 junction, is equipped with a plurality of little vents on the screen plate 17, and little vent prevents that the material after grinding from being discharged with grinding medium, is convenient for simultaneously blast air, and a plurality of vents equidistant arrangement is annular or annular, and blast orifice 14 is connected with blast apparatus, lets in gas at the grinding in-process, and the dust in the grinding chamber and the heat that produces can in time effectively be discharged, guarantees simultaneously that the material ejection of compact is more smooth and easy, improves grinding efficiency.

In the present embodiment, a base 90 is provided below the housing 10; the base 90 is cylindrical and the bottom is hollow structure, and the side of base 90 is equipped with access hole 91. Meanwhile, a through hole for discharging the grinding medium can be formed in the lower end face of the shell 10, so that the grinding medium can be conveniently discharged and replaced.

Example two

Referring to fig. 17, the difference between the vertical grinder of the present embodiment and the first embodiment is that the transmission device 20 is disposed below the housing 10, the transmission device 20 is directly and fixedly disposed on the base 90, and the access hole 91 is optimized and adjusted according to the size of the transmission device 20 for easy maintenance and installation, and a plurality of corresponding circular ventilation openings are annularly arranged.

The dry energy-saving vertical grinder with the conical double-screw rotor is used for dry grinding and shaping of powder and particles, and the feeding port 11 is arranged at the upper end or the upper end face of the side wall of the shell 10, the discharging port 13 is arranged at the lower end or the lower end face of the side wall of the shell, so that materials to be ground are fed from the upper end and discharged from the lower end, and the blast port 14 is arranged at the lower end face of the shell 10, so that air is conveniently blown in, dust and generated heat in the grinding process can be effectively discharged in time, the material discharging is ensured to be smoother, and the grinding efficiency is improved.

Therefore, the dry energy-saving vertical grinder with the truncated cone-like double-screw rotor has the advantages that the double-screw rotor is changed into the truncated cone-like shape from a cylindrical shape, and the dry energy-saving vertical grinder has the following advantages:

first, the angular velocity of the spiral rotor is the same, the edge linear velocity gradually increases from top to bottom, and the output energy of the grinding medium also gradually increases from top to bottom.

Secondly, the defect that the running speed of grinding media at the edge of the grinding cavity of the cylindrical double-screw rotor structure is gradually reduced from top to bottom under the action of gravity can be overcome, the grinding is more sufficient, and the efficiency is higher.

Third, the presence of a region of repose between the edge of the cylindrical double helical rotor structure and the edge of the grinding chamber can be eliminated.

The foregoing is only illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, and all equivalent changes made by the description of the utility model and the accompanying drawings, or direct or indirect application in the relevant art, are intended to be included within the scope of the utility model.

Claims (8)

1. The dry energy-saving vertical grinder with the conical-like double-screw rotor is characterized by comprising the conical-like double-screw rotor arranged on a rotating shaft, wherein the upper part of the double-screw rotor is small in diameter, the lower part of the double-screw rotor is large in diameter, and the double-screw rotor is conical-like when rotating;

the rotating shaft is arranged in the grinding cavity, and grinding medium is filled in the grinding cavity;

the grinding cavity is arranged in the shell.

2. The dry energy-saving type vertical grinder of a truncated cone-like double-screw rotor according to claim 1, wherein the screw rotor is connected with a transmission device through a rotating shaft, and the supporting mode adopts a single bearing type or a double bearing type;

the top of the grinding cavity is provided with an upper bearing, the upper bearing is rotatably sleeved at the upper end of the rotating shaft, and the transmission device is arranged at the top;

the double-bearing type grinding device is characterized in that an upper bearing and a lower bearing are respectively arranged at the top and the bottom of the grinding cavity, the upper bearing and the lower bearing are respectively rotatably sleeved at the upper end and the lower end of the rotating shaft, and the transmission device can be respectively arranged at the top or the bottom.

3. The dry energy-saving vertical grinder of a truncated cone-like double helical rotor according to claim 1, wherein the side wall of the housing is provided with at least one opening, an access door is arranged at the opening, a feed port and a dust collection port which are communicated with the interior of the grinding cavity are arranged at the upper part of the side wall of the housing, a discharge port which is communicated with the interior of the grinding cavity is arranged at the lower part of the side wall of the housing, and a blast port which is communicated with the interior of the grinding cavity is arranged at the lower end surface of the housing.

4. A dry energy-saving vertical grinder with truncated cone-like double helical rotor according to claim 3, wherein the grinding medium is corundum.

5. A dry process energy-saving vertical grinder with truncated cone-like double helical rotor according to claim 3, characterized in that the discharge opening is provided with a discharge grate provided with a plurality of horizontal gaps arranged side by side at equal intervals.

6. The dry energy-saving vertical mill of truncated cone-like double helical rotors according to claim 1, wherein the height to diameter ratio of the double helical rotors, H/D = 0.8-1.5, where H is the height of the double helical rotors and D is the maximum diameter of the double helical rotors.

7. A dry energy-saving vertical grinder of truncated cone-like double helical rotor according to claim 3, wherein said dust collection port is connected with a dust collector; the junction of blast orifice and casing is provided with the sieve, just the blast orifice is connected with blast apparatus.

8. The dry energy-saving vertical grinder of truncated cone-like double helical rotor according to claim 1, characterized in that a foundation is provided below the housing; the foundation is cylindric and the bottom is hollow structure, the foundation side is equipped with the access hole.