CN115245854A - Fuzzy control-based roller press control method and low-cost high-efficiency roller press - Google Patents

Fuzzy control-based roller press control method and low-cost high-efficiency roller press Download PDF

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Publication number
CN115245854A
CN115245854A CN202210720103.XA CN202210720103A CN115245854A CN 115245854 A CN115245854 A CN 115245854A CN 202210720103 A CN202210720103 A CN 202210720103A CN 115245854 A CN115245854 A CN 115245854A
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fuzzy
roller press
roller
roll
gear
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CN202210720103.XA
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CN115245854B (en
Inventor
张瑞明
王业胜
夏宣发
唐义林
汪浩
陈志鹏
周荣兵
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Hefei Zhongdu Machinery Co ltd
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Hefei Zhongdu Machinery Co ltd
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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/42—Driving mechanisms; Roller speed control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention discloses a fuzzy control-based roller press control method and a low-cost and high-efficiency roller press, wherein the method comprises the following steps of: s1, acquiring state data in the running process of a roller press and fuzzifying the state data; s2, establishing a fuzzy control rule according to the assignment of the fuzzy variable; s3, constructing a membership function according to the fuzzy variable; s4, fitting the membership function to generate an excitation function, and normalizing the excitation function to obtain a convergence value; s5, establishing a self-adaptive fuzzy model based on a fuzzy rule; s6, acquiring real-time operation data of the roller press, and outputting a fuzzy quantity according to the self-adaptive fuzzy model; s7, performing deblurring processing on the output fuzzy result by using a gravity center method; and S8, adjusting the running state of the roller press according to the deblurring result. A self-adaptive fuzzy control method is constructed to form a multi-input and multi-output fuzzy control system, so that the running state of the roller press can be adjusted in real time according to the working condition, and the load of the roller press is further balanced.

Description

Fuzzy control-based roller press control method and low-cost high-efficiency roller press
Technical Field
The invention relates to the technical field of roller press equipment, in particular to a fuzzy control-based roller press control method and a low-cost and high-efficiency roller press.
Background
A roll squeezer, also called a calender, a double roll machine, a rolling mill, an extrusion mill and a roll mill, is novel cement energy-saving grinding equipment developed in the middle of the international 80 s, has the functions of replacing a ball mill pre-grinding system with high energy consumption and low efficiency, reducing steel consumption and noise, is suitable for new factory construction, can also be used for technical transformation of old factories, improves the yield of the ball mill system by 30-50%, ensures that 0.08mm fine materials in a material cake after extrusion account for 20-35% and less than 2mm fine materials in the material cake after extrusion account for 65-85%, ensures that the internal structure of small particles is filled with a plurality of micro cracks due to extrusion, and greatly improves the grindability. The roller press consists of two extrusion rollers which rotate synchronously in opposite directions, materials are fed from the upper parts of the two rollers and are continuously brought between the rollers by the extrusion rollers, and the materials are crushed under the action of high pressure.
In the roller press in the prior art, the roller surface of the extrusion roller and the roller body are integrated, the roller body and the roller surface need to be integrally forged during manufacturing, and lugs which are orderly arranged are welded on the roller surface manually in a hot surfacing mode, so that the production difficulty is high, and the construction period and the price cost are extremely high. However, after the roller press is used for a long time, the roller press is extruded and rubbed by materials, the roller surface and the convex blocks are abraded, the squeeze roller needs to be replaced when the abrasion is serious, the materials entering from a feed inlet of the roller press are difficult to be uniformly distributed between two rollers, more materials can be accumulated in the middle of the common squeeze roller, and the roller press is caused to work for a period of time, the middle of the squeeze roller is abraded seriously, the two ends of the squeeze roller are slightly abraded, the whole squeeze roller needs to be replaced due to the integration of the roller surface and the roller body, the replacement cost is high, time and labor are extremely wasted when the whole squeeze roller is disassembled and then installed, and the working efficiency is influenced.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a fuzzy control-based roller press control method and a low-cost and high-efficiency roller press, so as to overcome the technical problems in the prior related art.
Therefore, the invention adopts the following specific technical scheme:
according to one aspect of the invention, a roller press control method based on fuzzy control is provided, and comprises the following steps:
s1, acquiring state data in the operation process of a roller press and fuzzifying the state data, wherein the state data comprises operation current I, operation power P, a material extrusion rate V, fine material content R in a material cake, a change rate delta I of the operation current and a change rate delta P of the operation power of the roller press;
s2, establishing a fuzzy control rule according to the assignment of the fuzzy variable, wherein the fuzzy control rule comprises the following steps:
s21, establishing a fuzzy control rule base which adopts an IF-THEN rule;
s22, establishing a node under the rule base;
and S23, establishing sub-nodes under the nodes, wherein the sub-nodes are the running variables of the roller press.
S24, configuring a parameter table for the child node;
s25, defining a triangular membership function for the parameters needing fuzzification, wherein the expression is as follows:
Figure BDA0003710957680000021
wherein x is an input variable, the parameters a and c respectively correspond to the coordinates of the left vertex and the right vertex of the lower part of the triangle, and the parameter b is the height coordinate of the vertex of the triangle;
s3, constructing a Gaussian membership function according to the fuzzy variable;
s4, fitting the Gaussian membership function to generate an excitation function, and normalizing the excitation function to obtain a convergence value;
s5, establishing an adaptive fuzzy model based on fuzzy rules, wherein the adaptive fuzzy model comprises the following steps:
s51, implementing fuzzy rule antecedents according to the convergence value of the excitation function, and correspondingly outputting different fuzzy inference rules according to fuzzy output values of different nodes;
s52, adjusting parameters of the fuzzy inference rule and parameters of the membership function by using a least square method and a back propagation algorithm, and completing a fuzzy rule back part to obtain a self-adaptive neural fuzzy system;
s6, acquiring real-time operation data I of the roller press n ,P n ,V n ,R n ,ΔI n ,ΔP n Outputting a fuzzy quantity set u according to the adaptive fuzzy model c (x)；
S7, a gravity center method is selected to perform deblurring processing on the output fuzzy result, wherein the specific function of the gravity center method is as follows,
Figure BDA0003710957680000022
wherein x is an input variable, a and b are the upper and lower limit values of the value range of x, u c (x) Is the output fuzzy quantity set;
s8, according to the deblurring result dfg (x) And adjusting the running state of the roller press, namely the running current I, the running power P, the material extrusion speed V, the content R of fine materials in a material cake, the change rate delta I of the running current and the change rate delta P of the running power of the roller press, so that the roller press is in the optimal running state.
According to another aspect of the invention, the invention also provides a fuzzy control-based low-cost high-efficiency roller press, which comprises a roller press main body, a refining mechanism, extrusion rollers and a driving assembly, wherein the roller press main body comprises a feed hopper, a roller press case and an equipment box, the refining mechanism and the extrusion rollers are sequentially arranged inside the roller press case from top to bottom, the driving assembly is arranged inside the equipment box and is used for driving the refining mechanism and the two extrusion rollers simultaneously, the refining mechanism rotates to enable the material entering the roller press case through the feed hopper to uniformly fall between the two extrusion rollers, and the two extrusion rollers synchronously rotate oppositely to grind the material; the squeeze roll comprises a roll surface, a roll body, a roll shaft and screws, the roll body is detachably assembled on the roll shaft, the roll surface comprises an end roll surface and a middle roll surface, the end roll surface and the middle roll surface are semicircular, and the end roll surface and the middle roll surface are detachably assembled at the middle part and the end part of the roll body respectively through the screws.
Further, the roll shaft comprises a special-shaped shaft, second rotating shafts, fixed mounting pieces and movable mounting pieces, one end of the special-shaped shaft is fixedly connected with the second rotating shafts, the fixed mounting pieces are fixedly assembled at the joint of the special-shaped shaft and the second rotating shafts, the two second rotating shafts are driven by the driving assembly to rotate oppositely and synchronously, and the roll body is sleeved on the special-shaped shaft through special-shaped holes which are radially formed; the fixed mounting piece and the movable mounting piece respectively comprise a connecting shaft and a mounting plate, a special-shaped groove is formed in the surface of the mounting plate of the movable mounting piece, and the movable mounting piece is sleeved at the other end of the special-shaped shaft through the special-shaped groove; the profiles of the special-shaped hole and the special-shaped groove are respectively matched with the profile of the special-shaped shaft.
Further, the roller press box comprises a homogenizing cavity, a flour milling cavity and a supporting side plate, wherein the homogenizing cavity is cylindrical, the surface of the inner wall of the homogenizing cavity is just contacted with the end part of the partition plate, a first feed opening is formed at the joint of the homogenizing cavity and the feed hopper, a second feed opening is formed at the joint of the homogenizing cavity and the flour milling cavity, and the sizes of openings of the first feed opening and the second feed opening are consistent with the size of the opening of the homogenizing area; the supporting side plates are arranged at two ends of the grinding cavity, two mounting holes are respectively formed in the surfaces of the supporting side plates, and the connecting shafts are respectively mounted on the mounting holes through bearings.
Furthermore, the driving assembly comprises a power source and a first gear, two mutually meshed first gears are fixedly sleeved on the surfaces of the two second rotating shafts respectively, and the power source is connected with one of the second rotating shafts; a transmission shaft is assembled on the outer wall of one side, close to the equipment box, of the rolling machine box, a second gear and a third gear are fixedly sleeved on the surface of the transmission shaft, a fourth gear is fixedly sleeved on the surface of the first rotating shaft, the second gear is meshed with one of the first gears, and the third gear is meshed with the fourth gear; the third gear comprises a gear main body and spaced gear teeth, the spaced gear teeth are uniformly distributed on the surface of the gear main body, and the rotatable angle size of the spaced gear teeth meshed with the fourth gear is consistent with the angle size of the opening of the material refining area.
Further, the screws comprise a first screw and a second screw, a first screw hole seat is arranged on one side of the end portion roller surface, mounting grooves are formed in two ends of the roller body respectively, a first thread groove and a thread hole are formed in the surface of the roller body, the mounting plates are arranged inside the mounting grooves respectively, second thread grooves are uniformly formed in the side portions of the mounting plates, and the first screw hole seat, the thread hole and the second thread groove which correspond to each other in position are fixedly assembled through the first screw respectively; a second screw hole seat is arranged on the other side of the end roller surface, third screw hole seats are respectively arranged on two sides of the middle roller surface, the second screw hole seats and the first thread grooves which correspond to each other in position are fixedly assembled through second screws, and the third screw hole seats are distributed in a staggered mode; the roller surface also comprises a joining roller surface which is detachably assembled at the outer side of the joint of the second screw hole seat and the third screw hole seat; the joining roller surface comprises a first joining roller surface and a second joining roller surface, the first joining roller surface and the second joining roller surface are combined to form a complete ring and are assembled at the joint of the end roller surface and the middle roller surface in a mode of expansion with heat and contraction with cold, and the first joining roller surface, the second joining roller surface, the end roller surface and the middle roller surface are further fastened through a clamping groove and clamping block structure.
The invention has the beneficial effects that:
1. by constructing the self-adaptive fuzzy control method, circuit data and material extrusion material information during the operation of the roller press can be introduced to form a multi-input and multi-output fuzzy control system, so that the operation state of the roller press can be adjusted in real time according to the working condition, the load of the roller press is balanced, the roller press is ensured to be in the optimal operation state, and the purposes of high efficiency and energy conservation are achieved.
2. Through from the top down sets gradually refining mechanism and squeeze roll in the roll-in press quick-witted incasement, drive refining mechanism and two squeeze rolls simultaneously through drive assembly, make the even falling between two squeeze rolls of the material that gets into roll-in press quick-witted incasement portion through the rotation of refining mechanism, two squeeze rolls rotate in opposite directions in step and grind the material, it is balanced to guarantee squeeze roll during operation surface pressure through even unloading, avoid forming the local too much material that piles up in squeeze roll surface and cause the grinding effect not good and squeeze roll surface local wearing and tearing seriously, through setting the squeeze roll into the structure of assembling, make each tip roll surface and middle part roll surface dismantle alone and install, reduce the replacement cost and be more convenient for change.
3. Drive the refining axle through first pivot and the baffle is rotatory, make the refining region that baffle and refining axle formed can switch, when the regional opening of one of them refining communicates with each other with the first feed opening of refining chamber upside, the material can fall into this refining region through first feed opening in, rotatory along with first pivot, the regional opening of refining slides along refining intracavity wall surface, communicate with each other until the opening communicates with each other with the second feed opening of refining chamber downside, the material in this refining region can be followed the even whereabouts of second feed opening to between two squeeze rolls of below, guarantee that material distributes evenly between the squeeze roll, improve the grinding effect to the material, and prevent that the squeeze roll surface from appearing local wear seriously.
4. Through the transmission meshing of third gear and fourth gear, the transmission shaft drives first pivot intermittent rotation, and when a refining region rotated to the opening just coincided with second feed opening, refining mechanism suspended rotation provided certain buffering time for the grinding of squeeze roll to improve the grinding effect to the material.
5. Through tip roll surface, middle part roll surface, linking roll surface assemble and form complete roll surface, the dismouting is simple and convenient between roll body and the dysmorphism axle, and each part dismouting alone, sound construction when assembling together can not produce not hard up, the change of each part of both being convenient for effectively reduces the replacement cost of squeeze roll, can not influence the normal grinding effect to the material again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling a roller press based on fuzzy control according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial cross-sectional structure of a low-cost and high-efficiency roller press based on fuzzy control according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a low-cost high-efficiency roller press based on fuzzy control according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the explosion of the squeeze roll of the low-cost and high-efficiency roll squeezer based on fuzzy control according to the embodiment of the invention;
FIG. 5 is a schematic diagram of roll surface explosion of a low-cost high-efficiency roll squeezer based on fuzzy control according to an embodiment of the invention;
FIG. 6 is a second schematic diagram of a partial cross-sectional structure of a low-cost and high-efficiency roller press based on fuzzy control according to an embodiment of the present invention;
FIG. 7 is a schematic view of a driving structure of squeeze rolls of a low-cost and high-efficiency roll squeezer based on fuzzy control according to an embodiment of the present invention;
FIG. 8 is a side view of the third and fourth gear assembly of a low cost, high efficiency roller press based on fuzzy control in accordance with an embodiment of the present invention.
In the figure:
1. a roller press main body; 11. a feed hopper; 12. rolling the machine box; 121. a material homogenizing cavity; 122. a powder grinding chamber; 123. supporting the side plates; 13. an equipment box; 2. a material homogenizing mechanism; 21. a first rotating shaft; 22. a refining shaft; 23. a partition plate; 3. a drive assembly; 31. a first gear; 32. a drive shaft; 33. a second gear; 34. a third gear; 341. a gear body; 342. spaced gear teeth; 35. a fourth gear; 4. rolling surface; 41. an end roll surface; 411. a first screw hole seat; 412. a second screw hole seat; 42. a middle roll surface; 421. a third screw hole seat; 422. a second card slot; 43. joining the roll surfaces; 431. a first engagement roll surface; 4311. a first clamping block; 4312. a third card slot; 432. a second engagement roll surface; 4321. a second fixture block; 5. a roller body; 51. a special-shaped hole; 52. mounting grooves; 53. a first thread groove; 54. a threaded hole; 6. a roll shaft; 61. a profiled shaft; 62. a second rotating shaft; 63. a connecting shaft; 64. mounting a plate; 641. a special-shaped groove; 642. a second thread groove; 7. a screw; 71. a first screw; 72. a second screw.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
According to the embodiment of the invention, a roller press control method based on fuzzy control is provided
The present invention will be further described with reference to the accompanying drawings and specific embodiments, and as shown in fig. 1, a fuzzy control based roll squeezer control method according to an embodiment of the present invention includes the following steps:
s1, acquiring state data in the operation process of a roller press and fuzzifying the state data, wherein the state data comprises operation current I, operation power P, a material extrusion rate V, fine material content R in a material cake, a change rate delta I of the operation current and a change rate delta P of the operation power of the roller press;
s2, establishing a fuzzy control rule according to the assignment of the fuzzy variable, wherein the fuzzy control rule comprises the following steps:
s21, establishing a fuzzy control rule base which adopts an IF-THEN rule;
s22, establishing a node under the rule base;
and S23, establishing sub-nodes under the nodes, wherein the sub-nodes are the running variables of the roller press.
S24, configuring a parameter table for the child node;
s25, defining a triangular membership function for the parameters needing fuzzification, wherein the expression is as follows:
Figure BDA0003710957680000071
wherein x is an input variable, the parameters a and c respectively correspond to the coordinates of the left vertex and the right vertex of the lower part of the triangle, and the parameter b is the height coordinate of the vertex of the triangle;
s3, constructing a Gaussian membership function according to the fuzzy variable;
s4, fitting the Gaussian membership function to generate an excitation function, and normalizing the excitation function to obtain a convergence value;
s5, establishing an adaptive fuzzy model based on fuzzy rules, wherein the adaptive fuzzy model comprises the following steps:
s51, implementing fuzzy rule antecedents according to the convergence value of the excitation function, and correspondingly outputting different fuzzy inference rules according to fuzzy output values of different nodes;
s52, adjusting parameters of the fuzzy inference rule and parameters of the membership function by using a least square method and a back propagation algorithm, and completing a fuzzy rule back part to obtain a self-adaptive neural fuzzy system;
s6, acquiring real-time operation data I of the roller press n ,P n ,V n ,R n ,ΔI n ,ΔP n Outputting a fuzzy quantity set u according to the adaptive fuzzy model c (x)；
S7, a gravity center method is selected to perform deblurring processing on the output fuzzy result, wherein the specific function of the gravity center method is as follows,
Figure BDA0003710957680000072
wherein x is an input variable, a and b are the upper and lower limit values of the value range of x, u c (x) Is the output fuzzy quantity set;
s8, according to the deblurring result dfg (x) And adjusting the running state of the roller press, namely the running current I, the running power P, the material extrusion speed V, the content R of fine materials in a material cake, the change rate delta I of the running current and the change rate delta P of the running power of the roller press, so that the roller press is in the optimal running state.
According to another aspect of the invention, a roller press based on fuzzy control is also provided, as shown in fig. 2-8, the roller press comprises a roller press main body 1, a refining mechanism 2, an extrusion roller and a driving assembly 3, wherein the roller press main body 1 comprises a feed hopper 11, a roller press case 12 and an equipment case 13, the refining mechanism 2 and the extrusion roller are sequentially arranged inside the roller press case 12 from top to bottom, the driving assembly 3 is arranged inside the equipment case 13 and is used for driving the refining mechanism 2 and the two extrusion rollers simultaneously, the refining mechanism 2 rotates to enable a material entering the roller press case 12 through the feed hopper 11 to uniformly fall between the two extrusion rollers, and the two extrusion rollers synchronously rotate oppositely to grind the material;
the squeeze roll comprises a roll surface 4, a roll body 5, a roll shaft 6 and screws 7, wherein the roll body 5 is detachably assembled on the roll shaft 6, the roll surface 4 comprises an end roll surface 41 and a middle roll surface 42, the end roll surface 41 and the middle roll surface 42 are semicircular, and the end roll surface 41 and the middle roll surface 42 are detachably assembled in the middle and the end of the roll body 5 through the screws 7 respectively.
In one embodiment, for the refining mechanism 2, the refining mechanism 2 comprises a first rotating shaft 21, a refining shaft 22 and partition plates 23, the first rotating shaft 21 is arranged at two ends of the refining shaft 22, the first rotating shaft 21 is driven to rotate by the driving assembly 3, the partition plates 23 are uniformly distributed on the surface of the refining shaft 22, and any two adjacent partition plates 23 and the refining shaft 22 form a refining area with an opening.
In one embodiment, for the roller shaft 6, the roller shaft 6 comprises a special-shaped shaft 61, a second rotating shaft 62, a fixed mounting part and a movable mounting part, one end of the special-shaped shaft 61 is fixedly connected with the second rotating shaft 62, the fixed mounting part is fixedly assembled at the joint of the two rotating shafts, the two second rotating shafts 62 are driven by the driving assembly 3 to rotate synchronously in opposite directions, and the roller body 5 is sleeved on the special-shaped shaft 61 through a special-shaped hole 51 which is radially formed; the fixed mounting piece and the movable mounting piece both comprise a connecting shaft 63 and a mounting plate 64, a special-shaped groove 641 is formed in the surface of the mounting plate 64 of the movable mounting piece, and the movable mounting piece is sleeved at the other end of the special-shaped shaft 61 through the special-shaped groove 641; the profiles of the profiled hole 51 and the profiled groove 641 match the profile of the profiled shaft 61.
In one embodiment, for the roller mill case 12, the roller mill case 12 includes a refining cavity 121, a grinding cavity 122 and a supporting side plate 123, the refining cavity 121 is cylindrical, the inner wall surface of the refining cavity 121 is just contacted with the end of the partition plate 23, a first feed opening is arranged at the joint of the refining cavity 121 and the feed hopper 11, a second feed opening is arranged at the joint of the refining cavity 121 and the grinding cavity 122, and the opening sizes of the first feed opening and the second feed opening are consistent with the opening size of a refining area; the supporting side plates 123 are arranged at two ends of the powder grinding cavity 122, two mounting holes are respectively formed in the surfaces of the supporting side plates 123, and the connecting shafts 63 are respectively mounted on the mounting holes through bearings.
In one embodiment, for the driving assembly 3, the driving assembly 3 includes a power source and first gears 31, two surfaces of the second rotating shafts 62 are respectively and fixedly sleeved with the two first gears 31 engaged with each other, and the power source is connected with one of the second rotating shafts 62; the outer wall of one side, close to the equipment box 13, of the rolling machine box 12 is provided with a transmission shaft 32, the surface of the transmission shaft 32 is fixedly sleeved with a second gear 33 and a third gear 34, a fourth gear 35 is fixedly sleeved on the surface of the first rotating shaft 21, the second gear 33 is meshed with one first gear 31, and the third gear 34 is meshed with the fourth gear 35; the third gear 34 includes a gear body 341 and spaced gear teeth 342, the spaced gear teeth 342 are uniformly distributed on the surface of the gear body 341, and the rotatable angle of the spaced gear teeth 342 when engaged with the fourth gear 35 is the same as the opening angle of the refining area.
In one embodiment, for the screw 7, the screw 7 includes a first screw 71 and a second screw 72, a first screw hole seat 411 is provided at one side of the end roller surface 41, mounting grooves 52 are respectively provided at two ends of the roller body 5, a first screw groove 53 and a screw hole 54 are provided on the surface of the roller body 5, the mounting plates 64 are respectively provided inside the mounting grooves 52, second screw grooves 642 are uniformly provided at the side of the mounting plates 64, and the first screw hole seat 411, the screw hole 54 and the second screw groove 642 corresponding to the positions are respectively fixedly assembled by the first screw 71; a second screw hole seat 412 is arranged on the other side of the end roller surface 41, third screw hole seats 421 are respectively arranged on two sides of the middle roller surface 42, the second screw hole seats 412 and the first screw grooves 53 which correspond to each other in position are fixedly assembled through second screws 72, and the third screw hole seats 412 and the third screw hole seats 421 are distributed in a staggered mode; the roller surface 4 further comprises an engaging roller surface 43, and the engaging roller surface 43 is detachably assembled at the outer side of the joint of the second screw hole seat 412 and the third screw hole seat 421; the joining roller surface 43 comprises a first joining roller surface 431 and a second joining roller surface 432, the first joining roller surface 431 and the second joining roller surface 432 are combined to form a complete ring and are assembled at the joint of the end roller surface 41 and the middle roller surface 42 in a heat expansion and cold contraction mode, and the first joining roller surface 431, the second joining roller surface 432, the end roller surface 41 and the middle roller surface 42 are further fastened through a clamping groove clamping block structure.
For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.
During the actual application, the material that will treat the grinding drops into the inside of roll-in machine case 12 from feeder hopper 11, and the material falls the work area to refining mechanism 2 earlier, and it is rotatory through drive assembly 3 drive refining mechanism 2, makes the material evenly fall between two squeeze rolls, drives two squeeze rolls through drive assembly 3 and rotates in opposite directions in step, realizes milling the smashing of material, and the discharge gate ejection of compact of the material of grinding through roll-in machine case 12 downside.
One of the second rotating shafts 62 is driven to rotate by a power source, the two second rotating shafts 62 are driven to rotate synchronously in opposite directions by the two first gears 31 which are meshed with each other, the second rotating shafts 62 drive the special-shaped shafts 61 to rotate, and further the roller bodies 5 are driven to rotate by the special-shaped shafts 61, and the two roller bodies 5 respectively drive the end roller surfaces 41 and the middle roller surfaces 42 on the surfaces of the two roller bodies to rotate synchronously; meanwhile, under the meshing transmission of one of the first gears 31 and the second gear 33, the transmission shaft 32 is driven to rotate through the second rotating shaft 62, further under the meshing transmission of the third gear 34 and the fourth gear 35, the transmission shaft 32 can drive the first rotating shaft 21 to intermittently rotate, the first rotating shaft 21 drives the refining shaft 22 and the partition plate 23 to rotate, and the refining area formed by the partition plate 23 and the refining shaft 22 can be switched;
the material to be ground is put into the material refining chamber from the feed hopper 11, when the first rotating shaft 21 rotates to the state that the opening of one of the refining regions is communicated with the first feed opening at the upper side of the refining chamber 121, the material in the feed hopper 11 falls into the refining region through the first feed opening, and along with the rotation of the first rotating shaft 21, the opening of the refining region slides along the surface of the inner wall of the refining chamber 121 until the opening is communicated with the second feed opening at the lower side of the refining chamber 121, and the material in the refining region uniformly falls between the two lower extrusion rollers from the second feed opening and is crushed and milled along with the rotation of the extrusion rollers.
The roller body 5 and the special-shaped shaft 61 are of an assembled structure, so that the replacement is convenient; the end roll surface 41, the middle roll surface 42 and the joining roll surface 43 are assembled to form a complete roll surface, and all roll surface components can be independently assembled and disassembled.
In summary, by means of the technical scheme of the invention, by constructing the adaptive fuzzy control method, the circuit data and the material information of material extrusion can be introduced during the operation of the roller press to form a multi-input and multi-output fuzzy control system, so that the operation state of the roller press can be adjusted in real time according to the working condition, the load of the roller press is further balanced, the roller press is ensured to be in the optimal operation state, and the purposes of high efficiency and energy conservation are achieved.
Through from the top down sets gradually refining mechanism 2 and squeeze roll in roll-in machine case 12, drive refining mechanism 2 and two squeeze rolls simultaneously through drive assembly 3, it evenly falls between two squeeze rolls to make through feed hopper 11 entering roller-in machine incasement portion's material through refining mechanism 2 is rotatory, two squeeze rolls rotate in opposite directions in step and grind the material, surface pressure is balanced when guaranteeing the squeeze roll during operation through even unloading, avoid forming squeeze roll surface part and pile up too much material and cause that the grinding effect is not good and squeeze roll surface local wear is serious, through setting the squeeze roll into the structure of assembling, make each tip roll surface and middle part roll surface dismantle alone and install, reduce the replacement cost and more be convenient for change.
It is rotatory to drive refining axle 22 and baffle 23 through first pivot 21 for the refining region that baffle 23 and refining axle 22 formed can switch, when one of them regional opening of refining communicates with each other with the first feed opening of refining chamber upside, the material can fall into in this refining region through first feed opening, along with first pivot 21 is rotatory, the regional opening of refining slides along refining intracavity wall surface, communicate with each other until the second feed opening of opening and refining chamber downside, the material in this refining region can be followed the even whereabouts of second feed opening and between two squeeze rolls of below, guarantee that the material distributes evenly between the squeeze roll, improve the grinding effect to the material, and prevent that the squeeze roll surface from appearing local wear serious.
Through the transmission engagement of the third gear 34 and the fourth gear 35, the transmission shaft 32 drives the first rotating shaft 21 to intermittently rotate, and when one material refining region rotates to the opening just coinciding with the opening of the second feed opening, the material refining mechanism stops rotating, so that certain buffering time is provided for grinding of the squeeze roller, and the grinding effect on the materials is improved.
Assemble through tip roll surface 41, middle part roll surface 42, joining roll surface 43 and form complete roll surface 4, the dismouting is simple and convenient between roll body 5 and the dysmorphism axle 61, and each part dismouting alone, sound construction when assembling together can not produce not hard up, and the change of each part of both having convenient for effectively reduces the replacement cost of squeeze roll, can not influence the normal grinding effect to the material again.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. A roller press control method based on fuzzy control is characterized in that the method is used for realizing the control of a roller press and comprises the following steps:
s1, acquiring state data in the operation process of a roller press and fuzzifying the state data, wherein the state data comprises operation current I, operation power P, a material extrusion rate V, fine material content R in a material cake, a change rate delta I of the operation current and a change rate delta P of the operation power of the roller press;
s2, establishing a fuzzy control rule according to the assignment of the fuzzy variable, wherein the fuzzy control rule comprises the following steps:
s21, establishing a fuzzy control rule base which adopts an IF-THEN rule;
s22, establishing a node under the rule base;
and S23, establishing sub-nodes under the nodes, wherein the sub-nodes are the running variables of the roller press.
S24, configuring a parameter table for the child node;
s25, defining a triangular membership function for the parameters needing fuzzification, wherein the expression is as follows:
Figure FDA0003710957670000011
wherein x is an input variable, the parameters a and c respectively correspond to the coordinates of the left vertex and the right vertex of the lower part of the triangle, and the parameter b is the height coordinate of the vertex of the triangle;
s3, constructing a Gaussian membership function according to the fuzzy variable;
s4, fitting the Gaussian membership function to generate an excitation function, and normalizing the excitation function to obtain a convergence value;
s5, establishing an adaptive fuzzy model based on fuzzy rules, wherein the adaptive fuzzy model comprises the following steps:
s51, implementing fuzzy rule antecedents according to the convergence value of the excitation function, and correspondingly outputting different fuzzy inference rules according to fuzzy output values of different nodes;
s52, adjusting parameters of the fuzzy inference rule and parameters of the membership function by using a least square method and a back propagation algorithm, and completing a fuzzy rule back part to obtain a self-adaptive neural fuzzy system;
s6, acquiring real-time running data of the roller press, namely real-time running current I of the roller press n Operating power P n Material extrusion rate V n The content of fines in the cake R n And the rate of change of the operating current Δ I n The rate of change of operating power Δ P n Outputting a fuzzy quantity set u according to the adaptive fuzzy model c (x)；
S7, a gravity center method is selected to perform deblurring processing on the output fuzzy result, wherein the specific function of the gravity center method is as follows,
Figure FDA0003710957670000012
wherein x is an input variable, a and b are the upper and lower limit values of the value range of x, u c (x) Is the output fuzzy quantity set;
s8, according to the deblurring result dfg (x) And adjusting the running state of the roller press, namely the running current I, the running power P, the material extrusion speed V, the content R of fine materials in a material cake, the change rate delta I of the running current and the change rate delta P of the running power of the roller press, so that the roller press is in the optimal running state.
2. The roller press with low cost and high efficiency based on fuzzy control is characterized by being controlled by the roller press control method based on fuzzy control in claim 1, and comprising a roller press main body (1), a refining mechanism (2), extrusion rollers and a driving assembly (3), wherein the roller press main body (1) comprises a feed hopper (11), a roller press case (12) and an equipment box (13), the refining mechanism (2) and the extrusion rollers are sequentially arranged inside the roller press case (12) from top to bottom, the driving assembly (3) is arranged inside the equipment box (13) and is used for simultaneously driving the refining mechanism (2) and the two extrusion rollers, materials entering the roller press case (12) through the feed hopper (11) uniformly fall between the two extrusion rollers through rotation of the refining mechanism (2), and the two extrusion rollers synchronously rotate oppositely to grind the materials;
the squeeze roll comprises a roll surface (4), a roll body (5), a roll shaft (6) and screws (7), wherein the roll body (5) is detachably assembled on the roll shaft (6), the roll surface (4) comprises a tip roll surface (41) and a middle roll surface (42), the tip roll surface (41) and the middle roll surface (42) are semicircular, the tip roll surface (41) and the middle roll surface (42) are respectively detachably assembled on the middle part and the end part of the roll body (5).
3. The fuzzy control based low-cost high-efficiency rolling press according to claim 2, characterized in that the roll shaft (6) comprises a special shaft (61), a second rotating shaft (62), a fixed mounting part and a movable mounting part, one end of the special shaft (61) is fixedly connected with the second rotating shaft (62), the fixed mounting part is fixedly assembled at the joint of the two rotating shafts, the two second rotating shafts (62) are driven by the driving assembly (3) to rotate synchronously in opposite directions, and the roll body (5) is sleeved on the special shaft (61) through a special hole (51) which is radially opened;
the fixed mounting piece and the movable mounting piece respectively comprise a connecting shaft (63) and a mounting plate (64), a special-shaped groove (641) is formed in the surface of the mounting plate (64) of the movable mounting piece, and the movable mounting piece is sleeved at the other end of the special-shaped shaft (61) through the special-shaped groove (641);
the profiles of the special-shaped hole (51) and the special-shaped groove (641) are matched with the profile of the special-shaped shaft (61) respectively.
4. The low-cost high-efficiency roller press based on fuzzy control according to claim 3, wherein the roller press case (12) comprises a homogenizing chamber (121), a grinding chamber (122) and a supporting side plate (123), the homogenizing chamber (121) is cylindrical, the inner wall surface of the homogenizing chamber (121) is just in contact with the end of the partition plate (23), a first blanking opening is formed at the joint of the homogenizing chamber (121) and the feed hopper (11), a second blanking opening is formed at the joint of the homogenizing chamber (121) and the grinding chamber (122), and the sizes of the first blanking opening and the second blanking opening are both consistent with the size of the opening of the homogenizing area;
the supporting side plates (123) are arranged at two ends of the powder grinding cavity (122), two mounting holes are formed in the surfaces of the supporting side plates (123) respectively, and the connecting shafts (63) are mounted on the mounting holes through bearings respectively.
5. The fuzzy control based low-cost high-efficiency roller press according to claim 4, characterized in that the driving assembly (3) comprises a power source, a first gear (31), two first gears (31) meshed with each other are fixedly sleeved on the surfaces of the two second rotating shafts (62), and the power source is connected with one of the second rotating shafts (62);
a transmission shaft (32) is assembled on the outer wall of one side, close to the equipment box (13), of the rolling machine box (12), a second gear (33) and a third gear (34) are fixedly sleeved on the surface of the transmission shaft (32), a fourth gear (35) is fixedly sleeved on the surface of the first rotating shaft (21), the second gear (33) is meshed with one of the first gears (31), and the third gear (34) is meshed with the fourth gear (35);
the third gear (34) comprises a gear body (341) and spaced gear teeth (342), the spaced gear teeth (342) are uniformly distributed on the surface of the gear body (341), and the rotatable angle of the spaced gear teeth (342) when being meshed with the fourth gear (35) is consistent with the angle of the opening of the refining area.
6. The fuzzy control-based low-cost high-efficiency rolling press according to claim 5, wherein the screws (7) comprise a first screw (71) and a second screw (72), a first screw hole seat (411) is arranged on one side of the end roll surface (41), mounting grooves (52) are respectively formed at two ends of the roll body (5), a first thread groove (53) and a thread hole (54) are formed on the surface of the roll body (5), the mounting plates (64) are respectively arranged in the mounting grooves (52), second thread grooves (642) are uniformly formed on the side portions of the mounting plates (64), and the first screw hole seat (411), the thread hole (54) and the second thread grooves (642) which correspond to each other in position are fixedly assembled through the first screw (71);
a second screw hole seat (412) is arranged on the other side of the end roller surface (41), third screw hole seats (421) are respectively arranged on two sides of the middle roller surface (42), the positions of the second screw hole seats (412) and the first screw grooves (53) which correspond to each other are fixedly assembled through second screws (72), and the third screw hole seats (421) and the first screw grooves (53) are respectively and alternately distributed;
the roll surface (4) further comprises an engaging roll surface (43), and the engaging roll surface (43) is detachably assembled outside the joint of the second screw hole seat (412) and the third screw hole seat (421);
the joining roller surface (43) comprises a first joining roller surface (431) and a second joining roller surface (432), the first joining roller surface (431) and the second joining roller surface (432) are combined to form a complete ring and assembled at the joint of the end roller surface (41) and the middle roller surface (42) in a mode of thermal expansion and cold contraction, and the first joining roller surface (431) and the second joining roller surface (432) are further fastened between the end roller surface (41) and the middle roller surface (42) through a clamping groove and clamping block structure.
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