CN117654701A - High-fiber material crushing method - Google Patents
High-fiber material crushing method Download PDFInfo
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- CN117654701A CN117654701A CN202311851119.5A CN202311851119A CN117654701A CN 117654701 A CN117654701 A CN 117654701A CN 202311851119 A CN202311851119 A CN 202311851119A CN 117654701 A CN117654701 A CN 117654701A
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- crushing
- fiber material
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/288—Ventilating, or influencing air circulation
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention belongs to the technical field of material crushing. The high-fiber material crushing method is realized by using an ultrafine crusher, wherein the ultrafine crusher comprises a crushing mechanism and a grading mechanism, and the crushing mechanism comprises a crushing chamber, a crushing disc, a hammer knife, a gear ring and a split cover which are arranged in the crushing chamber; the crushing method comprises the following steps: the high-fiber materials enter a crushing chamber of the superfine crushing mechanism, and the materials are crushed by utilizing a matched gear ring and a hammer knife; the striking linear speed of the hammer knife is 120-135m/s; the crushed small-particle materials enter the grading mechanism under the driving of ascending air flow, and qualified particles of the particles are screened out through the grading mechanism; unqualified materials are screened by the grading mechanism, fall onto the crushing disc, and are thrown to the hammer knife and the gear ring again under the action of centrifugal force to be crushed again. The invention is used for solving the technical problem of low productivity of the traditional high-fiber material crushing method.
Description
Technical Field
The invention belongs to the technical field of material crushing methods, and particularly relates to a high-fiber material crushing method.
Background
The superfine pulverizer mainly comprises a feeding mechanism, a pulverizing mechanism, a classifying mechanism and a corresponding transmission mechanism. The feeding mechanism controls the rotating speed of a feeding auger through a variable frequency motor so as to control the feeding quantity, and the crushing mechanism crushes large material particles into small particles through the cooperation of the hammer knife and the gear ring; the classifying mechanism separates small-particle materials meeting the fineness requirement from the crushing chamber through the classifying wheel and the flow dividing cover under negative pressure, and meanwhile, large-particle materials are forced to return to the crushing chamber to be continuously beaten by the crushing mechanism; the qualified small-particle materials separated out of the crushing chamber are conveyed to a material collecting device in time through pneumatic conveying and are collected.
The material after coarse crushing enters a crushing chamber from a feeder for crushing. Due to the high-speed rotation of the crushing disc, under the action of centrifugal force, the materials are crushed by the impact of the hammer blades arranged on the crushing disc and are flown to the surrounding gear rings at extremely high speed, and due to the small gap between the hammer blades and the gear rings, the air flow between the hammer blades and the gear rings is changed instantaneously due to the change of the tooth shape, and the materials are subjected to alternating stress in the gap and are crushed further under the repeated action. The crushed materials are carried between the inner wall and the split cover by the air flow entering from the air supply opening below the crushing disc, enter the outer ring of the classifying wheel along the inner wall of the chamber, are classified under the combined action of wind power, gravity and centrifugal force of the classifying wheel by adjusting the rotating speed of the classifying motor and the opening of the air gate, the separated coarse materials return to the crushing chamber from the inner cavity of the split cover and are crushed again, the fine materials (finished products) are sucked into the classifying impeller, enter the discharging chamber and enter the collecting system from the discharging opening.
As the cost of raw materials in the market rises, the production cost increases, the reduction of the cost of the raw materials becomes a great trend in the market, more and more aquatic feed customers adopt cheaper meal to replace the raw materials, so that the fiber content in a crushing formula increases, the crushing difficulty of equipment increases, the crushing productivity is reduced to some extent, and the productivity requirement of the original production line cannot be met.
Disclosure of Invention
The invention aims to provide a high-fiber material crushing method, which solves the technical problem of low productivity of the existing high-fiber material crushing method.
In order to solve the technical problems, the invention adopts the following technical scheme that the high-fiber material crushing method is characterized in that the crushing method is realized by utilizing an ultrafine crusher, the ultrafine crusher comprises a crushing mechanism and a classifying mechanism, and the crushing mechanism comprises a crushing chamber, a crushing disc, a hammer knife, a gear ring and a split cover which are arranged in the crushing chamber;
the crushing method comprises the following steps:
the high-fiber materials enter a crushing chamber of the superfine crushing mechanism, and the materials are crushed by utilizing a matched gear ring and a hammer knife; the striking linear speed of the hammer knife is 120-135m/s;
the crushing disc rotates to generate centrifugal force, and the crushed materials are thrown to the hammer knife and the gear ring for secondary crushing under the action of the centrifugal force;
the crushed small-particle materials enter the grading mechanism under the driving of ascending air flow, and qualified particles of the particles are screened out through the grading mechanism; unqualified materials are screened by the grading mechanism, fall onto the crushing disc, and are thrown to the hammer knife and the gear ring again under the action of centrifugal force to be crushed again.
According to the invention, by improving the linear speed of the hammer knife, the effect of crushing the high-fiber material is stronger, the classification efficiency of the classification wheel is better, the excessive crushing condition of particles meeting the requirements is reduced, the no-load energy consumption of equipment is reduced, the crushing performance of the whole machine is improved, and the comprehensive performance can be improved by 10-20% for different equipment model sizes and different material formulas, so that the invention has market competitiveness.
In order to solve the technical problems of low striking linear speed of the hammer knife and poor effect of crushing high-fiber materials caused by large weight of the crushing disc, the invention adopts the following technical scheme that the thickness of the crushing disc is 6-10mm. The thickness of the crushing chassis is reduced by thinning, so that the quality of the crushing disc is reduced. The quality of the crushing disc determines the no-load current of the motor for stable operation, the lower the no-load current is, the higher the corresponding useful crushing work is when the main motor runs at full, and the crushing efficiency is improved.
In order to solve the technical problems that the striking linear speed of a hammer knife is low and the effect of crushing high-fiber materials is poor due to the fact that the weight of a wear-resistant plate is large, the technical scheme is adopted in the invention, the wear-resistant plate is arranged on a crushing disc, and the thickness of the wear-resistant plate is 6-10mm. The thickness of the wear-resistant plate is reduced, so that the quality of the crushing disc is reduced. The quality of the crushing disc determines the no-load current of the motor for stable operation, the lower the no-load current is, the higher the corresponding useful crushing work is when the main motor runs at full, and the crushing efficiency is improved.
In order to solve the technical problems of low striking linear speed of the hammer blades and poor crushing effect of high-fiber materials caused by a large number of the hammer blades and a large weight, the invention adopts the following technical scheme that the number of the hammer blades is 16-20, and the hammer blades are uniformly distributed on the edge of the crushing disc taking the center of the circle of the crushing disc as the center. The mass of the crushing disc is reduced by optimizing the number of the hammer cutters. The quality of the crushing disc determines the no-load current of the motor for stable operation, the lower the no-load current is, the higher the corresponding useful crushing work is when the main motor runs at full, and the crushing efficiency is improved.
In order to solve the technical problem of low grading efficiency of a grading mechanism, the invention adopts the following technical scheme that the grading mechanism comprises a grading wheel, the grading wheel comprises a fixed ring, a chassis and grading blades circumferentially and uniformly distributed between the fixed ring and the chassis, and the grading blades are special-shaped blades and comprise a first connecting part, an inverted trapezoidal 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 chassis.
The classifying wheel is directly connected with the variable-frequency classifying motor to drive the classifying wheel to rotate, the rotating speed of the classifying wheel determines the size of particles of materials passing through, the classifying blades are of a narrow structure, large-particle materials are prevented from being reduced in speed due to the fact that the initial speed is high, the classifying blades are narrow in width, particles still can enter the classifying wheel, and the quality of classifying particles is guaranteed; meanwhile, on the premise of not increasing the wind resistance of the blades, the air inlet and outlet speeds of the classifying wheel are increased, crushed material particles enter the classifying wheel more easily and rapidly, classifying efficiency is improved, and time yield of equipment is improved.
In order to solve the technical problem how to realize the inverted trapezoidal blade part, the invention adopts the following technical scheme that the width of the inverted trapezoidal blade part is gradually increased from bottom to top.
In order to solve the technical problem of low classification efficiency caused by low air speed of a feed inlet of a crushing chamber, the invention adopts the following technical scheme that the flow dividing cover comprises a conical cover, and an air supplementing opening is arranged on the conical cover and used for enhancing the air speed of the feed inlet of the crushing chamber of the superfine crusher. The air supply port is additionally arranged at the position corresponding to the feeding port of the crushing chamber on the conical cover, the trend of an air path in the crushing chamber is changed, particles originally meeting the grading fineness requirement of the grading wheel in the crushed raw materials directly enter the grading wheel through the air supply port of the flow distribution cover, the crushing energy consumption is reduced, meanwhile, the air supply port additionally arranged on the flow distribution cover can effectively increase the air speed of the impurity removing pipe of the impurity removing port, the raw material leakage is avoided, and the integral performance of equipment is improved.
In order to solve the technical problem how to process the air supply port, the invention adopts the following technical scheme that the air supply port is in a round hole, a square hole, an elliptical hole, a waist-shaped hole or a grid shape.
Drawings
FIG. 1 is a block diagram of an ultra-fine pulverizer of the present invention;
FIG. 2 is a cross-sectional view of the ultra-fine pulverizer of the present invention;
FIG. 3 is a schematic structural view of a main shaft part of the ultra-fine pulverizer of the present invention;
FIG. 4 is a schematic structural view of a pulverizing mechanism of the ultra-fine pulverizer of the present invention;
FIG. 5 is a schematic structural view of a classifying mechanism of the ultra-fine pulverizer of the present invention;
FIG. 6 is a schematic structural view of a flow dividing cover of the ultra-fine pulverizer of the present invention;
in the figure: 1 a main shaft component;
11 a crushing disc; 111 crushing a chassis; 112 wear plates; 113 hammer knife; 114 capping;
12 driven pulleys; 13 a main shaft;
a belt 2;
a 3-stage wheel; 31 a fixing ring; a classifying vane 32; a chassis 33;
4, a shunt cover; 41 a fixed cylinder; 411 mounting a positioning hole; 42 a conical cap; 43 connecting the rib plates; 44 connecting the backing plate;
5, removing impurities; 51 trash discharge tube.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 6, the ultrafine grinder includes a main shaft member 1, a grinding mechanism, and a classifying mechanism.
The spindle unit 1 includes a driven pulley 12 and a spindle 13. The spindle unit 1 is connected to a main motor and a driving pulley via a belt 2. The invention relates to a hammer knife linear speed lifting scheme of an ultrafine grinder, which comprises the following steps: the diameter of the crushing disc is increased, and the diameter of the driven belt wheel is reduced.
The main motor drives the main shaft component 1 to rotate in a belt transmission mode, wherein the larger the diameter of the crushing disc 11 is, the smaller the diameter of the driven belt wheel 12 is, the higher the linear speed of the hammer knife 113 arranged on the crushing disc 11 is at the same main machine rotating speed, and the diameter of the proper crushing disc 11 and the diameter size of the driven belt wheel 12 are adjusted, so that the linear speed of the hammer knife is more beneficial to crushing and striking of high-fiber materials, and the crushing performance is improved. Preferably, the diameter of the crushing disc is 1572 + -5 mm, and the diameter of the driven pulley is 410 + -5 mm.
The crushing mechanism comprises a crushing chamber. The crushing chamber is internally provided with a crushing disc 11, a hammer blade 113, a gear ring and a split cover 4. The shredder plate 11 includes a shredder plate 111, wear plates 112, hammer blades 113, and a gland 114. The pulverizing chassis 111 is provided with a wear plate 112.
In one embodiment, the present invention reduces the shredder plate thickness of the micronizer. Specifically, the thickness of the crushing disc is 6-10mm, and the thickness of the wear-resisting plate is 6-10mm. In one embodiment, the number of the hammer cutters is 16-20, and the hammer cutters are uniformly distributed on the edge of the crushing disc which takes the center of the circle of the crushing disc as the center. By reducing the plate thicknesses of the pulverizing chassis 111 and the wear plate 112, the number of hammer blades 113 is optimized, the striking frequency is ensured, and the mass of the pulverizing disk 11 is reduced.
The crushing disc 11 is driven to rotate by the main motor through belt transmission, the quality of the crushing disc determines the no-load current of the motor for stable operation, the lower the no-load current is, the higher the corresponding useful crushing work is when the main motor runs fully, and the crushing efficiency is improved.
The classifying mechanism comprises a classifying wheel 3, and the classifying wheel 3 comprises a fixed ring 31, a chassis 33 and classifying blades 32. The classifying blades 32 are circumferentially and uniformly distributed between the fixed ring 31 and the chassis 33. The classifying blades 32 are special-shaped blades and comprise a first connecting part, an inverted trapezoidal 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 portion is connected with the base. Preferably, the width of the inverted trapezoidal blade portion gradually increases from bottom to top.
The blade structure of the classifying wheel of the superfine pulverizer is wide in upper part and narrow in lower part. The classifying wheel 3 is directly driven to rotate through a variable-frequency classifying motor, the rotating speed of the classifying wheel 3 determines the size of particles of materials passing through, and the classifying blades 3 are of a narrow structure, so that large-particle materials are prevented from being reduced in speed due to the fact that the initial speed is high, the classifying blades 3 are narrow in width, the particles can still enter the classifying wheel, and the quality of classified particles is guaranteed; meanwhile, on the premise of not increasing the wind resistance of the blades, the air inlet and outlet speeds of the classifying wheel 3 are increased, crushed material particles enter the classifying wheel more easily and rapidly, classifying efficiency is improved, and time yield of equipment is improved.
The invention relates to an ultrafine crushing split cover 4, which comprises a fixed cylinder 41, a conical cover 42, a connecting rib plate 43 and a connecting backing plate 44. The position of the feed inlet of the conical cover 42 is provided with an air supplementing port 421. The air supply port 421 is used for enhancing the air speed of the feed inlet of the crushing chamber of the superfine crusher. Preferably, the air supply port 421 may be a circular hole, a square hole, an elliptical hole, a kidney-shaped hole, or a grid-shaped hole.
The shunt cover 4 is fixed with the inner wall of the crushing chamber through the installation positioning hole 411 on the fixed cylinder 41, the air supply port 421 is additionally arranged at the position corresponding to the feeding port of the crushing chamber on the conical cover 42, the trend of an air path in the crushing chamber is changed, particles which originally accord with the classification fineness requirement of the classification wheel 3 in the crushed raw materials directly enter the classification wheel through the air supply port 421 of the shunt cover 4, the crushing energy consumption is reduced, meanwhile, the air supply port 421 additionally arranged on the shunt cover 4 can effectively increase the air speed of the impurity removing pipe 51 of the impurity removing port 5, the raw material leakage is avoided, and the integral performance of equipment is improved.
Aiming at the common technical problems of the prior superfine pulverizer, the invention provides a new structural scheme for a plurality of main structural components in the superfine pulverizer, and specifically comprises the following steps:
(1) aiming at the increase of the content of the miscellaneous meal fibers in the existing formula, the striking linear speed of a hammer blade of the superfine powder is improved by 120-135m/s, and the crushing quality of high-fiber materials is ensured;
(2) the thickness of the crushing disc is reduced to 5-10 mm), the number of the hammers is optimized to 16-20, and the crushing efficiency is improved;
(3) optimizing the blade structure of the classifying blade, and improving the classifying efficiency;
(4) and an air supply port is additionally arranged at the position opposite to the superfine powder feeding port of the split cover, so that an internal air path in the crushing chamber is changed, and the problems of material leakage and excessive crushing of the impurity removal port are reduced.
The structural scheme ensures that the superfine powder complete machine can still exert excellent crushing performance when facing to the formula of difficult-to-powder materials with high fiber content.
Compared with the traditional superfine pulverizer in the material pulverizing process, the superfine pulverizer has the advantages that the hammer knife linear speed is higher, the high-fiber material pulverizing effect is stronger, the classification efficiency of the classification wheel is better, the excessive pulverizing condition of particles meeting the requirements is reduced, the no-load energy consumption of equipment is reduced, the pulverizing performance of the whole machine is improved, and the comprehensive performance can be improved by 10-20% for different equipment model sizes and different material formulas, so that the superfine pulverizer has market competitiveness.
Example 2
The high fiber material crushing method is realized by using the superfine crusher in the embodiment 1, and comprises the following steps:
the high-fiber materials enter a crushing chamber of the superfine crushing mechanism, and the materials are crushed by utilizing a matched gear ring and a hammer knife; the striking linear speed of the hammer knife is 120-135m/s;
the crushing disc rotates to generate centrifugal force, and the crushed materials are thrown to a hammer knife and a gear ring for secondary crushing under the action of the centrifugal force; the crushed small particle materials enter a classification mechanism under the driving of ascending air flow, and qualified particles of the particles are screened out through the classification mechanism; unqualified materials are screened by the grading mechanism, fall onto the crushing disc, and are thrown to the hammer knife and the gear ring again for crushing again under the action of centrifugal force.
And (3) verifying experimental data:
aiming at the material characteristic change of the crushed raw materials, the technical proposal for improving the linear speed adjusts and optimizes the striking linear speed (120-130 m/s) of the hammer knife to be matched with the material characteristic change, thereby ensuring the crushing performance of the equipment; test verification is performed at the customer:
TABLE 1 Effect of different hammer knife line speeds on yield
According to the technical scheme of weight reduction of the crushing disc and optimization of the number of hammer cutters, the thickness (6-10 mm) of the crushing disc is reduced on the premise that dynamic balance is not affected when the crushing disc rotates and sufficient rigidity is ensured by software simulation, so that no-load energy consumption of equipment operation is reduced, crushing useful work is relatively increased, and crushing yield is improved; optimization of the number of hammers (16-20 bars) was verified by trial at the customer:
TABLE 2 Effect of different hammer blade numbers on yield
According to the technical scheme of the classification wheel optimization, through software simulation, on the premise of not increasing the wind resistance of the blades, the wind inlet and outlet speed and the upper width of the classification wheel are increased, small particles meeting classification conditions are ensured to enter more easily, and large particles not meeting requirements are prevented from entering the inside of the classification wheel as much as possible due to the large initial speed; the actual comparison at the customer site shows that the same material crushing fineness is achieved, the grading frequency of the grading wheel after optimization and improvement is 6-10HZ lower than the grading frequency before optimization, the grading energy consumption is reduced, and the grading efficiency is improved.
According to the technical scheme of the split cover, the wind speed of the feeding port is increased, small particles which originally meet the fineness requirement are directly sucked into the grading wheel, the excessive crushing of the materials is reduced, the crushing efficiency is improved, and the problem of material leakage of the impurity removing port due to insufficient wind speed is solved.
The above embodiments are only for illustrating the technical features and concepts of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it, and are not intended to limit the scope of the present invention, and all equivalent changes or modifications according to the spirit and embodiments of the present invention should be included in the scope of the present invention.
Claims (8)
1. The high-fiber material crushing method is characterized in that the crushing method is realized by utilizing an ultrafine crusher, the ultrafine crusher comprises a crushing mechanism and a grading mechanism, and the crushing mechanism comprises a crushing chamber, a crushing disc, a hammer knife, a gear ring and a flow dividing cover which are arranged in the crushing chamber;
the crushing method comprises the following steps:
the high-fiber materials enter a crushing chamber of the superfine crushing mechanism, and the materials are crushed by utilizing a matched gear ring and a hammer knife; the striking linear speed of the hammer knife is 120-135m/s;
the crushing disc rotates to generate centrifugal force, and the crushed materials are thrown to the hammer knife and the gear ring for secondary crushing under the action of the centrifugal force;
the crushed small-particle materials enter the grading mechanism under the driving of ascending air flow, and qualified particles of the particles are screened out through the grading mechanism; unqualified materials are screened by the grading mechanism, fall onto the crushing disc, and are thrown to the hammer knife and the gear ring again under the action of centrifugal force to be crushed again.
2. The high fiber material comminution method of claim 1, wherein the comminution disk has a thickness of 6-10mm.
3. The high fiber material pulverizing method according to claim 1 or 2, wherein the pulverizing disc is provided with a wear plate having a thickness of 6-10mm.
4. The high fiber material pulverizing method according to claim 1, wherein the number of the hammers is 16-20, and the hammers are uniformly distributed on the edge of the pulverizing disc with the center of the pulverizing disc as the center.
5. The high-fiber material crushing method according to claim 1, wherein the classifying mechanism comprises a classifying wheel, the classifying wheel comprises a fixed ring, a chassis and classifying blades circumferentially and uniformly distributed between the fixed ring and the chassis, the classifying 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 chassis.
6. The high fiber material pulverizing method according to claim 5, wherein the width of the inverted trapezoidal blade portion is gradually increased from bottom to top.
7. The high fiber material pulverizing method according to claim 1, wherein the flow dividing cover comprises a conical cover, and an air supplementing port is arranged on the conical cover and used for enhancing the air speed of a pulverizing chamber feed inlet of the superfine pulverizer.
8. The high fiber material pulverizing method according to claim 7, wherein the air supply opening is a round hole, a square hole, an elliptical hole, a kidney-shaped hole or a grid shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311851119.5A CN117654701A (en) | 2023-12-28 | 2023-12-28 | High-fiber material crushing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311851119.5A CN117654701A (en) | 2023-12-28 | 2023-12-28 | High-fiber material crushing method |
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| Publication Number | Publication Date |
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| CN117654701A true CN117654701A (en) | 2024-03-08 |
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ID=90080927
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311851119.5A Pending CN117654701A (en) | 2023-12-28 | 2023-12-28 | High-fiber material crushing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118976582A (en) * | 2024-10-18 | 2024-11-19 | 洛阳惠尔特节能环保科技有限公司 | A diamond particle air flow pulverizer |
-
2023
- 2023-12-28 CN CN202311851119.5A patent/CN117654701A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118976582A (en) * | 2024-10-18 | 2024-11-19 | 洛阳惠尔特节能环保科技有限公司 | A diamond particle air flow pulverizer |
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