CN112808442A - Crusher and grinding device and grinding method for crushing roller of crusher - Google Patents
Crusher and grinding device and grinding method for crushing roller of crusher Download PDFInfo
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- CN112808442A CN112808442A CN202110002142.1A CN202110002142A CN112808442A CN 112808442 A CN112808442 A CN 112808442A CN 202110002142 A CN202110002142 A CN 202110002142A CN 112808442 A CN112808442 A CN 112808442A
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- grinding
- roll
- crushing roller
- roller
- crushing
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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
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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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
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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
- B02C4/28—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
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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
- B02C2210/00—Codes relating to different types of disintegrating devices
- B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like
Abstract
The invention relates to a crusher and a grinding roller grinding device and a grinding method thereof, wherein the grinding device comprises a distance measuring mechanism, a grinding mechanism and a control system, the detection end of the distance measuring mechanism points to the axis of a crushing roller, and the distance measuring mechanism is used for detecting the distance between the detection end of the distance measuring mechanism and the roller surface of the crushing roller; the grinding mechanism comprises a grinding piece and a moving mechanism for driving the grinding piece to be close to or far away from the crushing roller, and the grinding piece is used for grinding the roller surface of the crushing roller; the control system is used for judging the wear loss of the roll surface according to the measured value of the distance measuring mechanism and controlling the grinding mechanism to grind the roll surface of the crushing roll when the wear loss at any position on the roll surface is greater than the preset wear loss; the grinding process of the grinding device for the crushing roller does not need manual participation, the crushing roller does not need to be detached from the crusher, the grinding process can be automatically completed on line, the potential safety hazard during manual operation can be effectively avoided, the maintenance time and the cost are reduced, and the intelligence level of equipment is improved.
Description
Technical Field
The invention relates to the technical field of crushers, in particular to a crusher and a grinding device and a grinding method of a crushing roller of the crusher.
Background
In the working process of the crusher, along with the extension of the running time, the crushing roller increases the roll gap due to abrasion, so that the granularity of a finished product exceeds the range of qualified products. In actual use, because the material is not evenly distributed along the axial direction of the crushing roller, but is concentrated on the middle part of the crushing roller for throwing the material, the abrasion degree in the middle of the crushing roller is higher than that on the two edges, the abrasion of the crushing roller is saddle-shaped, the abrasion of the middle part is large, and the abrasion of the two ends is less or not abraded. This affects the particle size distribution of the final product, which in turn adversely affects the production system. The traditional method for solving the problem is that after the equipment normally runs for a plurality of days, the crushing roller is detached and repaired, and the method not only influences the operation rate of the equipment, but also wastes manpower and materials and has large safety risk.
Disclosure of Invention
The first purpose of the invention is to provide a grinding device for a grinding roller, which is used for realizing online grinding of the grinding roller, saving labor, reducing maintenance time and cost and eliminating potential safety hazards.
A second object of the present invention is to provide a crusher and a grinding method of a grinding roll by the grinding device of a grinding roll.
In order to achieve the purpose, the invention provides the following technical scheme:
a grinding roll sharpening device, comprising:
the distance measuring mechanism is used for detecting the distance between the detection end of the distance measuring mechanism and the roll surface of the crushing roll along the direction vertical to the axial direction of the crushing roll;
the grinding mechanism comprises a grinding piece and a moving mechanism, the grinding piece is connected with the moving mechanism, the moving mechanism is used for driving the grinding piece to be close to or far away from the crushing roller, and the grinding piece is used for being in contact with the roller surface of the crushing roller to grind the roller surface of the crushing roller;
and the control system is respectively connected with the distance measuring mechanism and the coping mechanism, and is used for judging the wear loss of the roller surface of the crushing roller according to the measured value of the distance measuring mechanism and controlling the coping mechanism to perform coping on the roller surface of the crushing roller when the wear loss of any one position on the roller surface of the crushing roller is greater than a preset wear loss until the difference value of the wear losses between any two positions on the roller surface of the crushing roller is less than or equal to a preset value.
Preferably, the distance measuring mechanism comprises a supporting structure and a plurality of distance measuring instruments, each distance measuring instrument is arranged on the supporting structure at intervals along the axial direction of the crushing roller, and the distance between the detection end of each distance measuring instrument and the axial line of the crushing roller is equal.
Preferably, the distance measuring mechanism comprises a distance measuring instrument and a translation mechanism, wherein the distance measuring instrument is arranged on the translation mechanism, and the translation mechanism is used for driving the distance measuring instrument to move back and forth at two ends of the crushing roller along the axial direction of the crushing roller.
Preferably, the included angle between the connecting line between the detection end of the distance measuring instrument and the axis of the crushing roller and the horizontal plane is 0-90 degrees.
Preferably, the included angle between the connecting line between the detecting end of the distance measuring instrument and the axis of the crushing roller and the horizontal plane is 30-60 degrees.
Preferably, the moving mechanism comprises a transverse moving mechanism and a longitudinal moving mechanism, the grinding member is arranged on the other one of the transverse moving mechanism and the longitudinal moving mechanism through one of the transverse moving mechanism and the longitudinal moving mechanism, and the moving direction of one of the transverse moving mechanism and the longitudinal moving mechanism is parallel to the axial direction of the crushing roller.
Preferably, the grinding member comprises a grinding wheel and a grinding motor, the grinding motor is used for driving the grinding wheel to rotate, and the axial direction of the grinding wheel is parallel to the axial direction of the crushing roller.
A crusher, comprising:
at least one pair of cooperating crushing rolls;
each crushing roller is correspondingly provided with a set of the grinding device of the crushing roller.
A grinding roll coping method based on the grinding roll coping device according to any one of the above, comprising the steps of:
1) obtaining the initial distance L between the detection end of the distance measuring mechanism in the initial state of the crushing roller and each measurement point of the roller surface of the crushing roller1、L2、...、Ln；
2) Obtaining a first real-time distance L between a detection end of a distance measuring mechanism and each measuring point of the roll surface of the crushing roll at a certain moment after the crushing roll works1’、L2’、...、LnAcquiring the wear distribution delta of the crushing roller in the axial direction according to the acquired initial distance and the first real-time distance1、δ2、...、δn，δn＝Ln’-Ln；
3) If delta1、δ2、...、δnThe maximum value exceeds the preset abrasion loss and is smaller than the maximum abrasion loss, the moving mechanism is controlled to drive the grinding piece to move to be in contact with one end of the crushing roller and drive the grinding piece to move to the other end of the crushing roller to grind the crushing roller, and if delta is delta, the grinding piece is moved to the other end of the crushing roller to grind the crushing roller1、δ2、...、δnIf the maximum value exceeds the maximum abrasion loss, alarming and stopping the machine, if delta is greater than the maximum abrasion loss1、δ2、...、δnIf the maximum value of the abrasion loss does not exceed the preset abrasion loss, the step 4) is carried out;
4) obtaining a second real-time distance L between the detection end of the distance measuring mechanism after grinding and each measurement point of the roll surface of the crushing roll1”、L2”、...、Ln", if the second real-time distance L1”、L2”、...、LnIf the difference value of any two exceeds the preset value, the step 3) is returned, and if the second real-time distance L exceeds the preset value1”、L2”、...、LnAnd if the difference value of any two of the grinding mechanisms is smaller than or equal to the preset value, stopping grinding, and returning the grinding mechanism to the initial position.
Preferably, the method further comprises the steps of:
5) the roll gap is adjusted, and the roll gap adjustment amount is 2 (L)n”-Ln)；
6) Repeating the steps 2) to 5).
Preferably, the preset abrasion loss is 0.1R-0.2R, wherein R is the particle size of the finished product of the crusher.
According to the technical scheme, the grinding device for the crushing roller comprises a distance measuring mechanism, a grinding mechanism and a control system, wherein the detection end of the distance measuring mechanism points to the axis of the crushing roller, and the distance measuring mechanism is used for detecting the distance between the detection end of the distance measuring mechanism and the roller surface of the crushing roller along the direction vertical to the axial direction of the crushing roller; the grinding mechanism comprises a grinding piece and a moving mechanism, the grinding piece is connected with the moving mechanism, the moving mechanism is used for driving the grinding piece to be close to or far away from the crushing roller, and the grinding piece is used for being in contact with the roller surface of the crushing roller so as to grind the roller surface of the crushing roller; the control system is respectively connected with the distance measuring mechanism and the coping mechanism, and is used for judging the wear loss of the roll surface of the crushing roll according to the measured value of the distance measuring mechanism and controlling the coping mechanism to perform coping on the roll surface of the crushing roll when the wear loss of any one position on the roll surface of the crushing roll is larger than a preset wear loss until the difference value of the wear losses between any two positions on the roll surface of the crushing roll is smaller than or equal to the preset value; when the distance measuring mechanism is applied, the initial distance between the detection end of the distance measuring mechanism in the initial state of the crushing roller and each measuring point on the roller surface of the crushing roller is firstly obtained; then, acquiring a first real-time distance between a detection end of the distance measuring mechanism and each measuring point of the roll surface of the crushing roll at a certain moment after the crushing roll works, acquiring the wear distribution condition of the crushing roll in the axial direction according to the acquired initial distance and the first real-time distance, namely subtracting the initial distance from the first real-time distance at the same position on the crushing roll, and acquiring a value, namely the wear loss at the position; if the calculated maximum value of the abrasion loss on the crushing roller exceeds a preset abrasion loss and is smaller than the maximum abrasion loss, the moving mechanism is controlled to drive the grinding piece to move to be in contact with one end of the crushing roller and drive the grinding piece to move towards the other end of the crushing roller to grind the crushing roller, and if the calculated maximum value of the abrasion loss on the crushing roller exceeds the maximum abrasion loss, an alarm is given and the machine is stopped; and obtaining second real-time distances between the detection end of the distance measuring mechanism and each measurement point of the roller surface of the crushing roller after grinding, if the difference value of any two of the second real-time distances exceeds a preset value, the grinding is not in place, the grinding is continued, if the difference value of any two of the second real-time distances is less than or equal to the preset value, the grinding is in place, at the moment, the grinding is stopped, and the grinding mechanism returns to the initial position.
Therefore, the grinding device for the crushing roller can detect the abrasion condition of the roller surface of the crushing roller in real time, stop crushing when the abrasion quantity of a certain position of the roller surface of the crushing roller is detected to be large enough to influence the particle size of a finished product material, grind the roller surface of the crushing roller, and avoid the roller surface of the crushing roller from appearing saddle-shaped, so that the subsequent adjustment of the roller gap is facilitated, the occurrence of roller collision accidents during the adjustment of the roller gap and the phenomenon that the roller gap is not adjusted in place are avoided, and the particle size of the finished product is kept; and the grinding process does not need manual participation, and does not need to pull down the crushing roller from the crusher, and the grinding process can be automatically completed on line, so that the potential safety hazard during manual operation can be effectively avoided, the maintenance time and cost are reduced, and the intelligence level of equipment is improved.
The invention also provides a crusher based on the grinding device for the crushing roller, and the grinding device for the crushing roller has the beneficial effects, so that the crusher adopting the grinding device for the crushing roller has the same beneficial effects, and the details are not repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of a grinding roll sharpening device according to an embodiment of the present invention;
FIG. 2 is a side view of a grinding roll sharpening device according to an embodiment of the present invention;
FIG. 3 is a top view of a ranging mechanism according to an embodiment of the present invention;
fig. 4 is a profile view of a crushing roller generated when the grinding device for a crushing roller according to the embodiment of the present invention is operated.
Wherein:
1 is a crushing roller; 2, a grinding mechanism; 201 is a longitudinal guide rail; 202 is a longitudinal sliding seat; 203 is a transverse driving motor; 204 is a transverse guide rail; 205 is a transverse screw rod; 206 is a transverse sliding seat; 207 is a grinding motor; 208 is a grinding wheel; 3 is a roll gap adjusting mechanism; 4 is a distance measuring mechanism; 401 is a support structure; 402 is a range finder.
Detailed Description
One of the cores of the invention is to provide a grinding device for a grinding roller, so as to achieve the purposes of realizing online grinding of the grinding roller, saving manpower, reducing maintenance time and cost and eliminating potential safety hazards.
The other core of the invention is to provide a crusher and a grinding method of the crushing roller based on the grinding device of the crushing roller.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a top view of a grinding device for a crushing roller according to an embodiment of the present invention, and fig. 2 is a side view of the grinding device for a crushing roller according to an embodiment of the present invention.
The embodiment of the invention discloses a grinding device for a grinding roller 1, and the grinding device for the grinding roller 1 comprises a distance measuring mechanism 4, a grinding mechanism 2 and a control system.
The detection end of the distance measuring mechanism 4 points to the axis of the crushing roller 1, and the distance measuring mechanism 4 is used for detecting the distance between the detection end of the distance measuring mechanism 4 and the roller surface of the crushing roller 1 along the direction vertical to the axial direction of the crushing roller 1; the grinding mechanism 2 comprises a grinding piece and a moving mechanism, the grinding piece is connected with the moving mechanism, the moving mechanism is used for driving the grinding piece to be close to or far away from the crushing roller 1, and the grinding piece is used for being in contact with the roller surface of the crushing roller 1 so as to grind the space between the rollers of the crushing roller 1; the control system is respectively connected with the distance measuring mechanism 4 and the coping mechanism 2, and is used for judging the wear loss of the roller surface of the crushing roller 1 according to the measured value of the distance measuring mechanism 4 and controlling the coping mechanism 2 to perform coping on the roller surface of the crushing roller 1 when the wear loss of any one position on the roller surface of the crushing roller 1 is greater than the preset wear loss until the difference value of the wear losses between any two positions on the roller surface of the crushing roller 1 is less than or equal to the preset value; when in application, firstly, the initial distance between the detection end of the distance measuring mechanism 4 in the initial state of the crushing roller 1 and each measurement point of the roller surface of the crushing roller 1 is obtained; then, a first real-time distance between a detection end of the distance measuring mechanism 4 and each measurement point of the roll surface of the crushing roll 1 at a certain moment after the crushing roll 1 works is obtained, the wear distribution condition of the crushing roll 1 in the axial direction is obtained according to the obtained initial distance and the first real-time distance, namely, the initial distance is subtracted from the first real-time distance at the same position on the crushing roll 1, and the obtained value is the wear loss at the position, as shown in fig. 4; if the calculated maximum value of the abrasion loss on the crushing roller 1 exceeds the preset abrasion loss and is smaller than the maximum abrasion loss, controlling a moving mechanism to drive a grinding piece to move to be in contact with one end of the crushing roller 1 and drive the grinding piece to move towards the other end of the crushing roller 1 to grind the crushing roller 1, and if the calculated maximum value of the abrasion loss on the crushing roller 1 exceeds the maximum abrasion loss, alarming and stopping; and (3) acquiring second real-time distances between the detection end of the distance measuring mechanism 4 and each measurement point of the roll surface of the crushing roll 1 after grinding, if the difference value of any two of the second real-time distances exceeds a preset value, indicating that the grinding is not in place, continuing grinding, if the difference value of any two of the second real-time distances is less than or equal to the preset value, indicating that the grinding is in place, stopping the grinding, and returning the grinding mechanism 2 to the initial position.
Compared with the prior art, the grinding device for the crushing roller 1, provided by the embodiment of the invention, can detect the wear condition of the roller surface of the crushing roller 1 in real time, stop crushing when the fact that the wear amount of a certain position of the roller surface of the crushing roller 1 is large enough to influence the particle size of a finished product material is detected, grind the roller surface of the crushing roller 1, and avoid the roller surface of the crushing roller 1 from appearing in a saddle shape, so that the subsequent adjustment of a roller gap is facilitated, the occurrence of roller collision accidents during the adjustment of the roller gap and the phenomenon that the roller gap is not adjusted in place are avoided, and the particle size of the finished product is kept; and the grinding process does not need manual participation, and does not need to pull down the crushing roller 1 from the crusher, the grinding process can be automatically completed on line, the potential safety hazard during manual operation can be effectively avoided, the maintenance time and the cost are reduced, and the intelligent level of equipment is improved.
The distance measuring mechanism 4 can take various structures, in one embodiment of the invention, as shown in fig. 3, the distance measuring mechanism 4 comprises a supporting structure 401 and a plurality of distance measuring devices 402, the number of the distance measuring devices 402 depends on the length of the crushing roller 1 and the accuracy requirement for measuring the abrasion amount of the crushing roller 1, the greater the number of the distance measuring devices 402, the higher the accuracy of measuring the abrasion amount of the crushing roller 1, the total length of the array formed by the respective distance measuring devices 402 is equal to or similar to the length of the crushing roller 1, the distance measuring devices 402 are arranged on the supporting structure 401 at intervals along the axial direction of the crushing roller 1, and the distances between the detecting ends of the respective distance measuring devices 402 and the axial line of the crushing roller 1 are equal.
In the embodiment shown in fig. 3, the individual distance meters 402 are arranged in a straight line on the supporting structure 401, but in other embodiments they can be staggered, but it is necessary to ensure that the detection ends of the individual distance meters 402 are all equally spaced from the axis of the crushing roll 1 and that the detection ends of the individual distance meters 402 are all directed towards the axis of the crushing roll 1.
In another embodiment of the present invention, the distance measuring mechanism 4 comprises a distance meter 402 and a translation mechanism, the distance meter 402 is disposed at a moving end of the translation mechanism, the translation mechanism is configured to drive the distance meter 402 to reciprocate at two ends of the crushing roller 1 along the axial direction of the crushing roller 1, and the distance measuring mechanism 4 measures the distance between each measuring point on the roller surface of the crushing roller 1 and a detecting end of the distance meter 402 during the moving process.
The translation structure may be a piston cylinder, such as an air cylinder, a hydraulic cylinder, or a linear motor, or may include a rotary motor and a transmission mechanism, where the transmission mechanism is used to convert rotation of the rotary motor into linear motion, for example, the transmission mechanism may be a screw mechanism, a rack-and-pinion mechanism, or the like, and the translation mechanism may also be a combination of at least two of the above structures, so as to improve reliability of the translation mechanism.
The range finder 402 includes, but is not limited to, a laser range finder, an ultrasonic range finder, and an infrared range finder.
Preferably, the angle between the line between the sensing end of the distance meter 402 and the axis of the crushing roller 1 and the horizontal plane is 0 to 90 °.
Further, the included angle between the connecting line between the detecting end of the distance meter 402 and the axis of the crushing roller 1 and the horizontal plane is 30-60 degrees.
Preferably, the moving mechanism of the grinding mechanism 2 includes a transverse moving mechanism and a longitudinal moving mechanism, the grinding material is disposed on the other of the transverse moving mechanism and the longitudinal moving mechanism by one of the transverse moving mechanism and the longitudinal moving mechanism, and the moving direction of one of the transverse moving mechanism and the longitudinal moving mechanism is parallel to the axial direction of the crushing roller 1.
Specifically, in the embodiment of the present invention, as shown in fig. 1, the longitudinal moving mechanism includes a longitudinal rail 201, a longitudinal slide 202, and a longitudinal driving device, wherein the longitudinal slide 202 is slidably disposed on the longitudinal rail 201, the longitudinal driving device is connected to the longitudinal slide 202 for driving the longitudinal slide 202 to reciprocate along the longitudinal rail 201, the lateral moving device includes a lateral rail 204, a lateral slide 206, and a lateral driving device, the lateral rail 204 and the lateral driving device are disposed on the longitudinal slide 202, the lateral slide 206 is slidably disposed on the lateral rail 204, and the lateral driving device is for driving the lateral slide 206 to reciprocate on the lateral rail 204.
In the embodiment of the present invention, as shown in fig. 1, the transverse driving device includes a transverse driving motor 203 and a transverse lead screw 205, the transverse sliding base 206 is in threaded fit with the transverse lead screw 205, the longitudinal driving device is not shown in the figure, but may adopt a structure having the same principle as the transverse driving device, and details are not described herein.
The moving mechanism adopts a transverse and longitudinal two-dimensional moving structure, in practical application, according to different structures of the grinding piece, a one-dimensional moving structure can be adopted, for example, the grinding piece is a grinding roller with the same length as the crushing roller 1, when grinding is carried out, the moving mechanism only needs to drive the grinding roller to be close to or far away from the crushing roller 1 along the direction vertical to the axis of the crushing roller 1, so that the one-dimensional moving structure can be adopted, and a three-dimensional moving structure can be also adopted, namely, the moving structure can drive the grinding piece to move along the transverse direction, the longitudinal direction and the vertical direction, and in the embodiment of the invention, the grinding piece adopts the grinding wheel 208 with the axial dimension far smaller than that of the crushing roller 1, so that the moving structure adopts the two-dimensional moving structure, and the grinding wheel 208 can move along the axial direction of the crushing roller 1.
Preferably, in the embodiment of the present invention, the grinding member includes a grinding wheel 208 and a grinding motor 207, the grinding motor 207 is configured to drive the grinding wheel 208 to rotate, the grinding motor 207 drives the grinding wheel 208 to rotate in the same direction as the crushing roller 1, as shown in fig. 1 and 2, an axial direction of the grinding wheel 208 is parallel to an axial direction of the crushing roller 1, and the grinding motor 207 is disposed on the transverse sliding seat 206.
Of course, the structure of the grinding member is not limited to the above structure, and the grinding member may be a grinding belt or a grinding strip, which may be stationary during the grinding process, and grinding may be realized by rotation of the crushing roller 1, or the grinding roller 1 may be ground by up-and-down reciprocating movement driven by the grinding member driving structure.
In order to better judge whether the grinding part is in contact with the roller surface of the crushing roller 1, in the embodiment of the invention, the moving mechanism further comprises a pressure sensor, the pressure sensor is used for detecting the acting force of the crushing roller 1 on the grinding wheel 208, the pressure sensor can be arranged between the grinding wheel 208 and the grinding motor 207, and can also be arranged between the movable end and the fixed end of the longitudinal moving mechanism, so that when the pressure value detected by the pressure sensor reaches a preset value, the grinding wheel 208 is in contact with the crushing roller 1 and has enough pressure to grind.
The pressure sensor can also play a role in reducing the grinding amount of the large-abrasion-amount area in the middle of the crushing roller 1, and the background art mentions that because the material is unevenly distributed, the abrasion of the crushing roller 1 is mainly concentrated in the middle, therefore, the grinding is mainly performed at the two ends of the crushing roller 1 in the grinding process so as to keep the grinding roller flat with the middle, the roller gap is convenient to adjust and maintain the grain diameter, the pressure applied when the pressure sensor is contacted with the two ends of the crushing roller 1 is obviously greater than the pressure applied when the pressure sensor is contacted with the middle of the crushing roller 1, when the pressure applied by the pressure sensor is reduced, the grinding wheel 208 is moved to the middle of the crushing roller 1, the grinding amount required at the position is less, the grinding motor 207 can be controlled to reduce the rotating speed of the grinding wheel 208 so as to reduce the grinding amount, and when the grinding initial stage and the pressure of the pressure sensor is detected to be increased, the grinding wheel 208, at this time, the controller may control the sharpening motor 207 to increase the rotation speed to increase the sharpening amount.
The embodiment of the present invention further provides a crusher, which includes at least a pair of mutually matched crushing rollers 1 and the grinding device for the crushing rollers 1 as described in the above embodiment, each crushing roller 1 is correspondingly provided with a grinding device for the crushing roller 1, and since the grinding device for the crushing roller 1 has the above technical effects, the technical effects of the crusher having the grinding device for the crushing roller 1 are referred to the above embodiment.
The embodiment of the invention also provides a grinding roller 1 grinding method based on the grinding roller 1 grinding device of the embodiment, and the grinding method comprises the following steps:
1) obtaining the initial distance L between the detection end of the distance measuring mechanism 4 at the initial state of the crushing roller 1 and each measurement point of the roller surface of the crushing roller 11、L2、...、Ln；
The initial state refers to the state when the crushing roller 1 is not in operation, namely when the crushing roller 1 is not worn, the crusher is started when the detection is carried out, the roll gap is adjusted to the preset roll gap, and when the roll gap is adjusted, the initial distance is measured again.
2) Obtaining a first real-time distance L between a detection end of a distance measuring mechanism 4 and each measurement point of the roll surface of the crushing roll 1 at a certain moment after the crushing roll 1 works1’、L2’、...、Ln' obtaining the shaft of the crushing roller 1 according to the obtained initial distance and the first real-time distanceDistribution of wear in direction delta1、δ2、...、δn，δn＝Ln’-Ln；
After the initial distance measurement is completed, the control system can feed back a measurement completion signal to a user, for example, whether the measurement is completed or not can be fed back to the user by a mode of generating an outline diagram shown in fig. 4, after the user obtains the initial distance measurement completion signal, the crusher feeding system is controlled to start to supply materials to the crusher, the crusher feeding system can be adjusted according to the crushing difficulty degree of the crushed materials at a certain moment, for example, if the crushed materials are hard and easily cause the crushing roller 1 to grind, the interval from the moment when the crusher feeding system is started is short, if the hardness of the crushed materials is low and relatively not easily cause the crushing roller 1 to grind, the interval from the moment when the crusher feeding system is started can be set to be long, and the time interval can be hours, 1 day or days.
3) If delta1、δ2、...、δnThe maximum value exceeds the preset abrasion loss and is smaller than the maximum abrasion loss, the moving mechanism is controlled to drive the grinding piece to move to contact with one end of the crushing roller 1 and drive the grinding piece to move to the other end of the crushing roller 1 to grind the crushing roller 1, and if delta, the grinding piece is ground1、δ2、...、δnIf the maximum value exceeds the maximum abrasion loss, alarming and stopping the machine, if delta is greater than the maximum abrasion loss1、δ2、...、δnIf the maximum value of the abrasion loss does not exceed the preset abrasion loss, the step 4) is carried out;
the maximum wear amount is determined by the thickness of the wear-resistant layer on the surface layer of the crushing roller 1, and the preset wear amount is determined by the maximum allowable exceeding range of the particle size R of the finished material of the crusher, namely, if the preset wear amount exceeds the maximum allowable exceeding range of the particle size R of the finished material of the crusher, the particle size R of the finished material is not qualified.
4) Obtaining a second real-time distance L between the detection end of the distance measuring mechanism 4 after grinding and each measurement point of the roll surface of the crushing roll 11”、L2”、...、Ln", if the second real-time distance L1”、L2”、...、Ln"the difference between any two exceeds a preset value,returning to the step 3) if the second real-time distance L1”、L2”、...、Ln' if the difference between any two of the grinding wheels is less than or equal to the preset value, the grinding is stopped,
the grinding mechanism 2 returns to the initial position;
ideally, the predetermined value should be 0, i.e., L1”＝L2”＝...＝Ln"however, considering the practical application, there will inevitably be errors in the measurement and coping process, L1”、L2”、...、Ln"complete equality is difficult to achieve, thus allowing L in embodiments of the present invention1”、L2”、...、Ln"there is a small difference between the values, and the maximum value allowed by the difference can be used as the preset value when L1”、L2”、...、LnWhen the difference value of any two exceeds a preset value, the condition that the grinding is not in place and the grinding is continued is indicated, and L is1”、L2”、...、LnWhen the difference between any two of the L values is less than or equal to a preset value, the L value can be considered to be1”、L2”、...、Ln"substantially equal.
Further optimizing the technical scheme, the coping method further comprises the following steps:
5) the roll gap is adjusted, and the roll gap adjustment amount is 2 (L)n”-Ln)；
Ln”-LnThe thickness of the wear-resistant layer on the surface of the single crushing roller 1 is reduced, the abrasion loss of the pair of crushing rollers 1 is consistent, the abrasion loss is consistent with the grinding loss, and therefore, the adjustment amount of the roller gap is 2 x (L)n”-Ln)；
6) Repeating the steps 2) to 5).
Further, in the embodiment of the invention, the preset abrasion loss is 0.1R-0.2R, wherein R is the particle size of the finished material of the crusher.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A grinding roll sharpening device, comprising:
the distance measuring mechanism is used for detecting the distance between the detection end of the distance measuring mechanism and the roll surface of the crushing roll along the direction vertical to the axial direction of the crushing roll;
the grinding mechanism comprises a grinding piece and a moving mechanism, the grinding piece is connected with the moving mechanism, the moving mechanism is used for driving the grinding piece to be close to or far away from the crushing roller, and the grinding piece is used for being in contact with the roller surface of the crushing roller to grind the roller surface of the crushing roller;
and the control system is respectively connected with the distance measuring mechanism and the coping mechanism, and is used for judging the wear loss of the roller surface of the crushing roller according to the measured value of the distance measuring mechanism and controlling the coping mechanism to perform coping on the roller surface of the crushing roller when the wear loss of any one position on the roller surface of the crushing roller is greater than a preset wear loss until the difference value of the wear losses between any two positions on the roller surface of the crushing roller is less than or equal to a preset value.
2. The grinding roll sharpening device according to claim 1, wherein said distance measuring mechanism comprises a support structure and a plurality of distance measuring devices, each of said distance measuring devices being disposed on said support structure at intervals along an axial direction of the grinding roll, a distance between a detection end of each of said distance measuring devices and an axis of the grinding roll being equal.
3. The grinding roll grinding device according to claim 1, wherein the distance measuring mechanism comprises a distance measuring instrument and a translation mechanism, the distance measuring instrument is arranged on the translation mechanism, and the translation mechanism is used for driving the distance measuring instrument to reciprocate at two ends of the grinding roll along the axial direction of the grinding roll.
4. The grinding roll sharpening device according to claim 2 or 3, wherein an angle between a line connecting the detection end of the distance meter and the axis of the grinding roll and a horizontal plane is 0 ° to 90 °.
5. The grinding roll sharpening device according to claim 4, wherein an angle between a line connecting the detection end of the distance meter and the axis of the grinding roll and a horizontal plane is 30 ° to 60 °.
6. The grinding roll sharpening device according to any one of claims 1 to 3 and 5, wherein the moving mechanism includes a lateral moving mechanism and a longitudinal moving mechanism, the sharpening member is provided to one of the lateral moving mechanism and the longitudinal moving mechanism by the other of the lateral moving mechanism and the longitudinal moving mechanism, and a moving direction of one of the lateral moving mechanism and the longitudinal moving mechanism is parallel to an axial direction of the grinding roll.
7. The grinding roll sharpening device according to any one of claims 1 to 3 and 5, wherein said sharpening member includes a grinding wheel and a sharpening motor for driving said grinding wheel to rotate, an axial direction of said grinding wheel being arranged in parallel with an axial direction of said grinding roll.
8. A crusher, characterized by comprising:
at least one pair of cooperating crushing rolls;
a grinding roll coping device according to any one of claims 1 to 7 is correspondingly arranged on each crushing roll.
9. A grinding roll coping method based on the grinding roll coping apparatus according to any one of claims 1 to 7, comprising the steps of:
1) obtaining the initial distance L between the detection end of the distance measuring mechanism in the initial state of the crushing roller and each measurement point of the roller surface of the crushing roller1、L2、...、Ln；
2) Obtaining a first real-time distance L between a detection end of a distance measuring mechanism and each measuring point of the roll surface of the crushing roll at a certain moment after the crushing roll works1’、L2’、...、LnAcquiring the wear distribution delta of the crushing roller in the axial direction according to the acquired initial distance and the first real-time distance1、δ2、...、δn，δn＝Ln’-Ln；
3) If delta1、δ2、...、δnThe maximum value exceeds the preset abrasion loss and is smaller than the maximum abrasion loss, the moving mechanism is controlled to drive the grinding piece to move to be in contact with one end of the crushing roller and drive the grinding piece to move to the other end of the crushing roller to grind the crushing roller, and if delta is delta, the grinding piece is moved to the other end of the crushing roller to grind the crushing roller1、δ2、...、δnIf the maximum value exceeds the maximum abrasion loss, alarming and stopping the machine, if delta is greater than the maximum abrasion loss1、δ2、...、δnIf the maximum value of the abrasion loss does not exceed the preset abrasion loss, the step 4) is carried out;
4) obtaining a second real-time distance L between the detection end of the distance measuring mechanism after grinding and each measurement point of the roll surface of the crushing roll1”、L2”、...、Ln", if the second real-time distance L1”、L2”、...、LnIf the difference value of any two exceeds the preset value, the step 3) is returned, and if the second real-time distance L exceeds the preset value1”、L2”、...、LnAnd if the difference value of any two of the grinding mechanisms is smaller than or equal to the preset value, stopping grinding, and returning the grinding mechanism to the initial position.
10. The grinding roll wear detection method of claim 9, further comprising the steps of:
5) the roll gap is adjusted, and the roll gap adjustment amount is 2 (L)n”-Ln)；
6) Repeating the steps 2) to 5).
11. The method of claim 9, wherein the predetermined amount of wear is between 0.1R and 0.2R, where R is a particle size of the finished crusher material.
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| CN202110002142.1A CN112808442A (en) | 2021-01-04 | 2021-01-04 | Crusher and grinding device and grinding method for crushing roller of crusher |
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| CN202110002142.1A CN112808442A (en) | 2021-01-04 | 2021-01-04 | Crusher and grinding device and grinding method for crushing roller of crusher |
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| CN117086711A (en) * | 2023-10-17 | 2023-11-21 | 江苏东冶轧辊有限公司 | Clamping mechanism for roller production |
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