CN219210131U

CN219210131U - Classifying wheel and superfine pulverizer

Info

Publication number: CN219210131U
Application number: CN202223581722.XU
Authority: CN
Inventors: 陈博; 林溪
Original assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Current assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-06-20
Anticipated expiration: 2032-12-31

Abstract

The utility model belongs to the technical field of crushing equipment. The grading wheel comprises a fixed ring, a base and blades uniformly distributed circumferentially between the fixed ring and the base, and is characterized in that the blades are special-shaped blades and comprise an upper connecting part, an inverted trapezoid blade part and a lower connecting part; the upper connecting part is connected with the fixed ring; the lower connecting portion is connected with the base. The superfine pulverizer comprises the grading wheel. The utility model is used for solving the technical problem that the yield is reduced due to the fact that the rotating speed is increased to meet the fineness requirement of a finished product in the conventional classification wheel.

Description

Classifying wheel and superfine pulverizer

Technical Field

The utility model belongs to the technical field of crushing equipment, and particularly relates to a classification wheel and an ultrafine crushing machine comprising the classification wheel.

Background

The crushing part of the superfine crusher mainly comprises a crushing disc, a hammer knife and a gear ring. The gear ring is fixed around the crushing cavity, and the crushing disc drives the hammer knife on the disc to rotate at high speed through the motor and belt transmission. The materials fall down to the hammer knife area through the impurity removing port and the feeding pipe, and collide and crush between the hammer knife and the gear ring; the particle size requirement of superfine grinding finished product particles is changed by adjusting the rotating speed of the classifying wheel, the particles meeting the classifying conditions of the classifying wheel enter the discharge port through negative pressure induced draft, and the materials which do not meet the size of the particles enter the grinding cavity again for circular grinding.

The crushed materials reach the gear ring area of the crushing cavity wall under the action of centrifugal force, reach the classifying wheel area under the action of ascending air flow, enter the classifying wheel under the action of radial air flow, ascend under the action of axial air flow, leave the classifying area and finish classification. The material which does not meet the diameter particle requirement is thrown out of the classifying wheel and enters the crushing cavity again for circular crushing.

The main problem that exists of current grading wheel: on the premise of determining the grading particle size of the grading wheel (the rotating speed and the air quantity are fixed), particles which are not less than the particle size requirement exist in the actual working condition and enter the grading wheel, so that the fineness requirement of a finished product is not up to the standard, the rotating speed of the grading wheel is required to be further improved, the yield is reduced, and the production efficiency is influenced.

Disclosure of Invention

The first object of the utility model is to provide a classifying wheel, which is used for solving the technical problem that the yield is reduced due to the fact that the rotating speed is increased to meet the fineness requirement of a finished product in the prior classifying wheel.

In order to solve the technical problems, the utility model adopts the following technical scheme that the classifying wheel comprises a fixed ring, a base and blades uniformly distributed circumferentially between the fixed ring and the base, and is characterized in that the blades are special-shaped blades and comprise a first connecting part, an inverted trapezoid blade part and a second connecting part which are arranged from top to bottom; the first connecting part is connected with the fixed ring; the second connecting part is connected with the base.

The special-shaped classifying wheel is adopted, on the premise of not increasing the wind resistance of the blades, the wind inlet and outlet speed and the width of the upper part of the classifying wheel are increased, small particles meeting classifying conditions are ensured to enter, and large particles which do not meet the requirements are prevented from entering the inside of the classifying wheel as much as possible due to the large initial speed. The utility model increases the wind inlet and outlet speed among the blades, so that materials are easier to enter, the classification efficiency is improved, and the productivity of the superfine pulverizer is improved.

In order to further solve the technical problem that the yield is reduced due to the fact that the rotating speed is increased to meet the fineness requirement of a finished product in the conventional classifying wheel, the utility model adopts the following technical scheme that the width of the inverted trapezoidal blade part is gradually increased from bottom to top. According to the utility model, the width of the classifying wheel blade is wide at the upper part and narrow at the lower part, on the premise of not increasing the wind resistance of the classifying wheel, the wind inlet and outlet speed and the width of the upper part of the classifying wheel are increased, so that small particles meeting the classifying conditions are ensured to enter, and large particles not meeting the requirements are prevented from entering the inside of the classifying wheel as much as possible due to the large initial speed, the classifying effect is ensured, and the classifying quality is improved.

In order to solve the technical problem of low classifying efficiency of the classifying wheel, the utility model adopts the following technical scheme that the ratio of the width of the special-shaped blades to the gap between the adjacent special-shaped blades is 1.3-1.8, thereby ensuring a higher wind speed interval of the classifying wheel area and improving the classifying efficiency.

According to the technical scheme, the inverted trapezoidal blade part is obliquely arranged towards the center of the base so as to adapt to the conical structure of the classifying wheel.

In order to solve the technical problem of how to connect the special-shaped blade with the fixed ring, the utility model adopts the following technical scheme that the first connecting part is transversely provided with a first positioning groove, and the first positioning groove is fixedly connected with the fixed ring after being inserted. The special-shaped blades of the grading wheel are fixedly connected with the fixing ring through plugging firstly and then welding, for example, the special-shaped blades are stable and firm.

According to the technical scheme, the vertical protrusions are arranged on the first connecting portions and located above the first locating grooves, the first connecting portions are reinforced, and the problem that strength of the first connecting portions is reduced due to the fact that grooves are formed in the first connecting portions is solved.

According to the technical scheme, the first connecting part is square.

In order to solve the technical problem of how to connect the special-shaped blade with the base, the utility model adopts the following technical scheme that a second positioning groove is radially arranged on the periphery of the base, and the second positioning groove is fixedly connected with a second connecting part of the corresponding special-shaped blade after being inserted. The special-shaped blades of the classifying wheel are fixedly connected with the classifying wheel base through plugging firstly and then welding, for example, the special-shaped blades are stable and firm.

According to the technical scheme, the second connecting part is square.

A second object of the present utility model is to provide a micronizer comprising a classification wheel as defined in any of the preceding claims.

Drawings

FIG. 1 is a schematic view of the installation of a classification wheel according to the present utility model;

FIG. 2 is a side view of a profiled blade of the classification wheel of the present utility model;

FIG. 3 is a schematic structural view of the ultra-fine pulverizer of the present utility model.

Detailed Description

Example 1

Through the simulation analysis of the original grading wheel, the following conclusion is obtained:

(1) The inward wind speed of the upper part of the classifying wheel is higher, and the outward wind speed of the lower part of the classifying wheel is higher;

(2) After the radial width of the blade is increased, the wind speeds of the inner wind speed and the outer wind speed are increased; it is thus foreseen that: the structure of the upper layer of the classification wheel has great influence on the yield and quality of superfine powder, and the upper layer structure should be emphasized; the simulation result shows that when the structure of the classifying wheel is changed, the air inlet and outlet quantity at the upper part of the classifying wheel is changed, and the proper proportion of the air inlet and outlet quantity can influence the classifying effect, thereby influencing the yield; because the small particles are easy to turn, the large air output can lead to the large number of the small particles to be carried out, but the small air output and the large air input are required to ensure that the blades are wide enough, the large particles can be decelerated to 0 between the blades, otherwise, the large particles enter the classification wheel in a large number to influence the classification effect.

Therefore, the design of the grading wheel structure of the utility model is that the grading wheel is of a conical structure and comprises a special-shaped blade 1, a base 2 and a fixing ring 3 as shown in figures 1 and 2. The outer diameter of the fixing ring 3 is larger than the outer diameter of the base 2.

The special-shaped blades 1 are circumferentially and uniformly distributed between the fixed ring 3 and the base 2, and comprise a first connecting part 100, an inverted trapezoidal blade part 101 and a second connecting part 102.

The first connection portion 100 is for connection with the fixing ring 3, and the first connection portion 100 is preferably square. The first connecting part is transversely provided with a first positioning groove 103, and the first positioning groove is fixedly connected with the fixed ring after being inserted. Preferably, the classifying wheel special-shaped blades 2 are fixedly connected with the fixed ring 3 through welding. A vertical protrusion 104 is provided on the first connection part 100, and the protrusion 104 is located above the first positioning groove 103. The protrusion 104 is used for reinforcing the first connecting portion, and solves the problem that the strength of the first connecting portion is reduced due to the fact that the first connecting portion is grooved.

The width of the inverted trapezoidal blade portion 101 gradually increases from bottom to top. The ratio of the width of the special-shaped blade 1 to the gap between adjacent special-shaped blades is 1.3-1.8. The gap ratio between the width of the special-shaped blades and the special-shaped blades is maintained between 1.3 and 1.8, so that a higher wind speed interval of a classification wheel area is ensured, and classification efficiency is improved.

The inverted trapezoidal blade portion 101 is disposed obliquely toward the center of the base 2 to accommodate the tapered structure of the classifying wheel.

The second connection portion is used for connecting the base 2 with the second connection portion 102, and the second connection portion 102 is preferably square. The second connection portion 102 is smaller than the first connection portion 100. Specifically, a second positioning groove is radially arranged on the periphery of the base 2, and the second positioning groove is fixedly connected with the second connecting part 102 of the corresponding special-shaped blade 2 after being inserted. Preferably, the special-shaped blades 2 of the classifying wheel are fixedly connected with the base of the classifying wheel through welding.

The working principle of the grading wheel is as follows:

the crushed materials pass through the hammer knife and the gear ring and reach the outer ring of the classifying wheel under the action of ascending air flow, the classifying wheel rotates at high speed, and under the combined action of centrifugal force, gravity and negative-pressure induced draft of the materials under the driving of the classifying wheel blades, the materials meeting the requirements of classifying particle sizes are sucked into the classifying wheel;

because the width of the special-shaped classifying wheel blades is gradually increased from bottom to top, spiral upward airflow trend is formed on the adjacent blades, most materials pass through the classifying wheel from the upper parts of the blades, after the width of the upper parts of the blades is increased, the phenomenon that the speed is reduced between the blade widths due to the fact that the initial speed of large particles is large is avoided, and therefore the materials still enter the inside of the classifying wheel is avoided, and the quality of classifying particles is ensured;

meanwhile, compared with a conventional grading wheel with the same number of blades and blade gaps, the whole special-shaped grading wheel has the advantages that the whole air inlet speed is larger, particles are easier to enter, the grading efficiency is improved, and the productivity of equipment is improved.

The special-shaped classifying wheel blade is adopted, the blade width is narrow at the lower part and wide at the upper part, the wind inlet and outlet speed and the width of the upper part of the classifying wheel are increased on the premise of not increasing the wind resistance of the blade, small particles meeting classifying conditions are ensured to enter, and large particles which do not meet requirements are prevented from entering the inside of the classifying wheel as much as possible due to the large initial speed.

The ratio of the width of each blade to the gap between adjacent blades is maintained between 1.3 and 1.8, so that the higher wind speed interval of the whole classifying wheel area is ensured, the classifying efficiency is improved, and the yield is improved.

The utility model adopts the special-shaped grading wheel, increases the wind inlet and outlet speed among the blades, ensures that materials are easier to enter, improves the grading efficiency and improves the productivity of the superfine powder machine.

According to the utility model, the width of the classifying wheel blade is wide at the upper part and narrow at the lower part, on the premise of not increasing the wind resistance of the classifying wheel, the wind inlet and outlet speed and the width of the upper part of the classifying wheel are increased, so that small particles meeting the classifying conditions are ensured to enter, and large particles not meeting the requirements are prevented from entering the inside of the classifying wheel as much as possible due to the large initial speed, the classifying effect is ensured, and the classifying quality is improved.

Example 2

As shown in fig. 3, a superfine pulverizer includes the classification wheel of the above embodiment 1.

Claims

1. The grading wheel comprises a fixed ring, a base and blades uniformly distributed circumferentially between the fixed ring and the base, and is characterized in that the blades are special-shaped blades and comprise a first connecting part, an inverted trapezoid blade part and a second connecting part which are arranged from top to bottom; the first connecting part is connected with the fixed ring; the second connecting part is connected with the base.

2. The classifying wheel according to claim 1, wherein the width of the inverted trapezoidal blade portion is gradually increased from bottom to top.

3. Grading wheel according to claim 1 or 2, characterized in that the ratio of the width of the profiled blade to the gap between adjacent profiled blades is 1.3-1.8.

4. A classifier wheel according to claim 3, wherein the inverted trapezoidal blade portion is inclined to the centre of the base.

5. The classifying wheel according to claim 1, wherein the first connecting portion is provided with a first positioning groove transversely, and the first positioning groove is fixedly connected with the fixing ring after being inserted.

6. The classification wheel of claim 5, wherein the first connection portion is provided with a vertical protrusion, and the protrusion is located above the first positioning groove.

7. The classification wheel of claim 6, wherein the first connection portion is square.

8. The classifying wheel according to claim 5, wherein a second positioning groove is radially formed in the periphery of the base, and the second positioning groove is fixedly connected with the second connecting portion of the corresponding special-shaped blade after being inserted.

9. The classification wheel of claim 8, wherein the second connection portion is square.

10. A micronizer comprising a classification wheel according to any of claims 1-9.