Overload protection method, crushing equipment, control device and storage medium
By employing overload protection methods for motors and torque limiters in dual-shaft coarse crushing equipment, detecting motor current and controlling reverse and disengagement torque, the problem of drive system burnout due to overload is solved, crushing efficiency is improved and labor costs are reduced.
Patent Information
- Application Number
- CN202511546106.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-02
AI Technical Summary
The drive system of existing twin-shaft coarse crushing equipment is prone to burnout under frequent peak torque, and the overload protection is not timely, resulting in motor damage and low crushing efficiency, and increased labor costs.
An overload protection method combining a motor and a torque limiter is adopted. By detecting the motor current, the motor is controlled to reverse and the torque limiter is disengaged to prevent motor overload. Combined with differential and synchronous reverse technology, the fault is automatically eliminated.
It improves crushing efficiency, reduces the chance of motor burnout, reduces labor costs, and achieves automated overload protection.
Smart Images
Figure CN121244355A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of material crushing equipment, and particularly relates to an overload protection method, a crushing equipment, a control device and a storage medium. BACKGROUND
[0002] In a double-shaft coarse crushing equipment, in order to produce high-efficiency tearing and shearing on materials (such as household garbage, general industrial garbage, large-size garbage and the like) and effectively prevent the materials from being wound and stuck, the most effective action mode is to adopt two crushing roller knives to rotate periodically and at high frequency, so as to crush the materials by extrusion and cutting. However, such extremely harsh working requirements make the driving system bear huge inertial impact, and the driving system needs to provide frequent peak torque. In the past, the driving system adopts a hydraulic pump and a hydraulic motor to realize the driving, but has the defects of slow response, extremely low efficiency, complex system, frequent maintenance and the like.
[0003] Later, manufacturers try to adopt a motor to constitute the driving system, but still have problems of large starting current impact and serious heating in the process of frequent forward and reverse rotation. When the materials are not completely crushed, the motor is blocked, and if the overload protection is not timely, the motor is easily burned. However, frequent fault reporting needs the workers to frequently maintain, reduces the crushing efficiency and increases the labor cost. SUMMARY
[0004] The present application aims at at least solving one of the problems in the prior art. To this end, the present application provides an overload protection method, a crushing equipment, a control device and a storage medium, which reasonably protect, improve the crushing efficiency, reduce the labor cost, timely protect and reduce the probability of motor burning.
[0005] According to the overload protection method of the first aspect of the present application, the method is applied to a crushing device, the crushing device comprises a frame, a first crushing module, a second crushing module, a current detection module and a control module, the frame has a crushing cavity, the first crushing module comprises a first motor, a first torque limiter and a first roller cutter assembly, the first roller cutter assembly is rotatably arranged on the frame and located in the crushing cavity, the first motor is connected with the first roller cutter assembly through the first torque limiter to drive the first roller cutter assembly to rotate, the second crushing module comprises a second motor, a second torque limiter and a second roller cutter assembly, the second roller cutter assembly is rotatably arranged on the frame and located in the crushing cavity, the second motor is connected with the second roller cutter assembly through the second torque limiter to drive the second roller cutter assembly to rotate, the current detection module is connected with the first motor and the second motor to detect motor phase current, the control module is connected with the current detection module, the first motor, the first torque limiter, the second motor and the second torque limiter, and the control module executes the overload protection method, and the overload protection method comprises the following steps: rotating the first motor and the second motor, and acquiring motor phase current of the first motor and the second motor; when any one of the motor phase currents exceeds a first current threshold value and a time threshold value is reached, the first motor and the second motor perform a reverse rotation step; in the reverse rotation step, when any one of the motor phase currents exceeds a second current threshold value, the first torque limiter and the second torque limiter are disconnected to disconnect the transmission of driving force between the first motor and the first roller cutter assembly and the transmission of driving force between the second motor and the second roller cutter assembly, and the second current threshold value is greater than the first current threshold value.
[0006] According to the overload protection method of the present application, at least the following beneficial effects are achieved: The overload protection method controls the rotation of the first motor and the second motor to crush the material, obtains motor phase currents of the first motor and the second motor, and proves that soft overload occurs when any one motor phase current exceeds a first current threshold value, for example, the first roller cutter assembly or the second roller cutter assembly is wound or lightly blocked by the material. When the motor phase current exceeds the first current threshold value, the first motor and the second motor are not burned out, at this time, the first motor and the second motor are allowed to continue to rotate to further extrude and cut the material, and if the motor phase current still exceeds the first current threshold value after the duration reaches a time threshold value, the first motor and the second motor perform a reverse rotation step. In the reverse rotation, the first roller cutter assembly and the second roller cutter assembly can remove the winding of the material or further tear the material, that is, the fault can be automatically eliminated. However, when the fault cannot be eliminated and the material further blocks the first motor and the second motor, the motor phase current will further increase. When the motor phase current is greater than a second current threshold value, the first torque limiter and the second torque limiter immediately disengage to disconnect the transmission of driving force between the first motor and the first roller cutter assembly and the transmission of driving force between the second motor and the second roller cutter assembly, thereby preventing the first motor and the second motor from being burned out. The design is reasonable in overload protection, improves crushing efficiency, reduces labor cost, timely protects in an emergency, and reduces the probability of motor burnout.
[0007] According to some embodiments of the application, in the reverse rotation step, the step travel of the first motor and the second motor is recorded respectively, and when the step travel reaches a fault removal travel threshold value, the first motor and the second motor are controlled to reverse again.
[0008] According to some embodiments of the application, in the reverse rotation step, the first motor is controlled to rotate at a first rotation speed, and the second motor is controlled to rotate at a second rotation speed, wherein the first rotation speed is greater than the second rotation speed; and in the step of controlling the first motor and the second motor to reverse again when the step travel reaches the fault removal travel threshold value, the first motor and the second motor are controlled to reverse again when the step travel of the first motor and the second motor both reaches the fault removal travel threshold value.
[0009] According to some embodiments of the application, in the reverse rotation step, the first motor is controlled to rotate at a second rotation speed when the step travel of the first motor reaches the fault removal travel threshold value until the step travel of the second motor also reaches the fault removal travel threshold value.
[0010] According to some embodiments of the application, after obtaining the motor phase currents of the first motor and the second motor, the first torque limiter and the second torque limiter disengage to disconnect the transmission of driving force between the first motor and the first roller cutter assembly and the transmission of driving force between the second motor and the second roller cutter assembly when the rising value of the motor phase current in a unit time is greater than a change threshold value.
[0011] According to some embodiments of the present application, the step of controlling the first motor and the second motor to rotate comprises: controlling the first motor to rotate in a first direction, and controlling the second motor to rotate in a second direction, wherein the first direction and the second direction are opposite to each other; the step of controlling the first motor and the second motor to perform the reversing step comprises: controlling the first motor to rotate in a third direction, wherein the first direction and the third direction are opposite to each other; and controlling the second motor to rotate in a fourth direction, wherein the second direction and the fourth direction are opposite to each other.
[0012] According to some embodiments of the present application, the step of controlling the first motor and the second motor to rotate comprises: controlling the first motor to rotate in a first direction, and controlling the second motor to rotate in a second direction after a buffer time interval; the step of controlling the first motor and the second motor to perform the reversing step comprises: controlling the first motor and the second motor to reverse at the same time.
[0013] According to the crushing device of the second aspect of the embodiments of the present application, the crushing device comprises a rack, a first crushing module, a second crushing module, a current detection module and a control module, the rack has a crushing cavity, the first crushing module comprises a first motor, a first torque limiter and a first roller cutter assembly, the first roller cutter assembly is rotationally arranged on the rack and located in the crushing cavity, the first motor is connected with the first roller cutter assembly through the first torque limiter to drive the first roller cutter assembly to rotate, the second crushing module comprises a second motor, a second torque limiter and a second roller cutter assembly, the second roller cutter assembly is rotationally arranged on the rack and located in the crushing cavity, the second motor is connected with the second roller cutter assembly through the second torque limiter to drive the second roller cutter assembly to rotate, the current detection module is connected with the first motor and the second motor respectively to detect the motor phase current, and the control module is connected with the current detection module, the first motor, the first torque limiter, the second motor and the second torque limiter respectively, and the control module executes the overload protection method disclosed in any of the embodiments to control the first motor and the second motor to operate.
[0014] According to the crushing device of the embodiments of the present application, at least the following beneficial effects are achieved: The crushing device of the present application, the control module executes the overload protection method disclosed in any of the embodiments to control the first motor and the second motor to operate, reasonable overload protection, improve the crushing efficiency, reduce the labor cost, at the same time, timely protection in emergency, reduce the probability of motor burning.
[0015] According to the control device of the third aspect of the embodiments of the present application, the control device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the overload protection method disclosed in the above embodiments.
[0016] According to a computer readable storage medium of the fourth aspect of the present application, the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the overload protection method disclosed in the above embodiments.
[0017] Additional aspects and advantages of the present application will be made apparent from the following description of the application. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments, given with reference to the following drawings, in which: Figure 1 A schematic view of a three-dimensional structure of one of the embodiments of the crushing device of the present application; Figure 2 A schematic view of a three-dimensional structure of one of the embodiments of the crushing device of the present application; Figure 3 A flow chart of one of the embodiments of the overload protection method of the present application; Figure 4 A schematic view of a three-dimensional structure of one of the embodiments of the crushing device of the present application;
[0019] Reference Signs: Rack 100; crushing cavity 110; fixed knife 120; first crushing module 200; first motor 210; first torque limiter 220; first roller knife assembly 230; second crushing module 300; second motor 310; second torque limiter 320; second roller knife assembly 330; control module 400; current detection module 410; processor 610; memory 620; input / output interface 630; communication interface 640; bus 650. DETAILED DESCRIPTION
[0020] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.
[0021] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in a different order than the module division in the device or the order in the flow chart. The terms "first", "second", etc. in the specification and claims and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.
[0022] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing the embodiments of the present application only and is not intended to be limiting of the present application.
[0024] As Figures 1 to 3 As shown in FIG. 1, according to the overload protection method of the first aspect of the present application, the overload protection method is applied to a crushing device, the crushing device includes a rack 100, a first crushing module 200, a second crushing module 300, a current detection module 410, and a control module 400. The rack 100 has a crushing cavity 110. The first crushing module 200 includes a first motor 210, a first torque limiter 220, and a first roller cutter assembly 230. The first roller cutter assembly 230 is rotatably arranged in the rack 100 and located in the crushing cavity 110. The first motor 210 is connected to the first roller cutter assembly 230 through the first torque limiter 220 to drive the first roller cutter assembly 230 to rotate. The second crushing module 300 includes a second motor 310, a second torque limiter 320, and a second roller cutter assembly 330. The second roller cutter assembly 330 is rotatably arranged in the rack 100 and located in the crushing cavity 110. The second motor 310 is connected to the second roller cutter assembly 330 through the second torque limiter 320 to drive the second roller cutter assembly 330 to rotate. The current detection module 410 is connected to the first motor 210 and the second motor 310 to detect the motor phase current. The control module 400 is connected to the current detection module 410, the first motor 210, the first torque limiter 220, the second motor 310, and the second torque limiter 320. The control module 400 executes the overload protection method.
[0025] The control module 400 comprises a processor such as an MCU or a CPU and its associated circuitry, and the rack 100 can be enclosed by sheet metal parts, and specifically can form a rectangular or elliptical crushing cavity 110 with a material adding port at the top. The first roller cutter assembly 230 comprises a first rotating roller and a plurality of first rotating blades arranged along the length direction of the first rotating roller at intervals. A plurality of fixed blades can be arranged in the inner wall of the crushing cavity 110. The first rotating blades and the fixed blades are arranged in a staggered manner. The first rotating blades and the fixed blades cooperate to shear and tear to realize the crushing of the material. Similarly, the second roller cutter assembly 330 comprises a second rotating roller and a plurality of second rotating blades arranged along the length direction of the second rotating roller at intervals. The second rotating blades also cooperate with the fixed blades to shear and tear to realize the crushing of the material.
[0026] The rotors of the first motor 210 and the second motor 310 can adopt a salient pole structure (formed by laminated silicon steel sheets), without permanent magnets and windings. The rotor position is monitored by a Hall sensor, a photoelectric sensor or an electromagnetic sensor, and the control module 400 controls the power switching devices (such as IGBTs and MOS tubes) corresponding to the stator windings to be turned on or turned off in a predetermined order, so as to change the direction of the stator magnetic field and drive the rotor to rotate. The motor has a simple structure and high reliability, and adopts an electronic commutation mode. Without permanent magnets, there is no risk of demagnetization, and there is no brush wear. The response speed of commutation and reversal is greatly improved, and the heat dissipation performance is also better.
[0027] The first torque limiter 220 and the second torque limiter 320 can be friction type torque limiters, which transmit torque through the friction force between the friction plates. When the motor phase current is too large and the torque exceeds the set threshold, the friction plates slip to cut off the power transmission.
[0028] The first torque limiter 220 and the second torque limiter 320 can also be ball type torque limiters, which use the movement of the balls in special tracks to limit torque. When the motor phase current is too large and the torque exceeds the set threshold, the balls are separated from the tracks, and the driving side and the driven side are separated.
[0029] The first torque limiter 220 and the second torque limiter 320 can also adopt electromagnetic torque limiters, which control the engagement and separation of the clutches through electromagnetic force. The control module 400 is connected to the controlled ends of the first torque limiter 220 and the second torque limiter 320, respectively. When the motor phase current is too large, the control module 400 controls the electromagnetic force to disappear, and the clutches are disengaged.
[0030] The current detection module 410 can adopt a plurality of conventional resistance type voltage division sampling circuits, which are connected to the first motor 210 and the second motor 310 respectively to obtain the motor phase current.
[0031] AsFigure 3 As shown, the overload protection method comprises: S510, control the first motor 210 and the second motor 310 to rotate, and obtain the motor phase current of the first motor 210 and the second motor 310; S520, when any one of the motor phase currents exceeds the first current threshold and the duration reaches the time threshold, control the first motor 210 and the second motor 310 to perform a reverse step; S530, in the reverse step, when any one of the motor phase currents exceeds the second current threshold, the first torque limiter 220 and the second torque limiter 320 are disengaged to disconnect the transmission of driving force between the first motor 210 and the first roller cutter assembly 230 and disconnect the transmission of driving force between the second motor 310 and the second roller cutter assembly 330, wherein the second current threshold is greater than the first current threshold.
[0032] It can be understood that the first torque limiter 220 and the second torque limiter 320 can adopt mechanical torque limiters such as friction torque limiters and ball torque limiters, or can adopt electrically controlled torque limiters. For the mechanical torque limiter, when the motor phase current exceeds the second current threshold and the torque exceeds the set threshold, it is automatically disengaged. For the electrically controlled torque limiter, when the motor phase current exceeds the second current threshold, the control module 400 controls disengagement.
[0033] The first current threshold can be set to 130%-160% of the motor rated current, and can be set to 150% in particular. The second current threshold can be set to 180%-220% of the motor rated current, and can be set to 200% in particular.
[0034] The overload protection method controls the rotation of the first motor 210 and the second motor 310 to crush the material, acquires the motor phase current of the first motor 210 and the second motor 310, and proves that soft overload occurs when any one motor phase current exceeds the first current threshold value, for example, there is a first roller cutter assembly 230 or a second roller cutter assembly 330 being wound or lightly blocked by the material. When the motor phase current exceeds the first current threshold value, the first motor 210 and the second motor 310 are not burned, at this time, the first motor 210 and the second motor 310 are allowed to continue to rotate, further extruding and cutting the material, and if the motor phase current still exceeds the first current threshold value after the duration reaches the time threshold value, the first motor 210 and the second motor 310 are controlled to perform a reverse rotation step. In the reverse rotation, the first roller cutter assembly 230 and the second roller cutter assembly 330 can remove the winding of the material or further tear the material, that is, the fault can be automatically eliminated. However, when the fault cannot be eliminated, the material further blocks the first motor 210 and the second motor 310, at this time, the motor phase current will further increase, when the motor phase current is greater than the second current threshold value, the first torque limiter 220 and the second torque limiter 320 immediately separate to disconnect the transmission of driving force between the first motor 210 and the first roller cutter assembly 230 and the transmission of driving force between the second motor 310 and the second roller cutter assembly 330, thereby preventing the first motor 210 and the second motor 310 from being burned. The design is reasonable in overload protection, improves the crushing efficiency, reduces the labor cost, protects in time in an emergency, and reduces the probability of motor burning.
[0035] In some embodiments of the application, in the reverse rotation step, the step distance of the first motor 210 and the second motor 310 is recorded respectively, and when the step distance reaches the fault removal distance threshold value, the first motor 210 and the second motor 310 are controlled to reverse again.
[0036] The control module 400 can drive the first motor 210 and the second motor 310 to reverse by recording and outputting a driving signal of a fixed period, so that the step distance of the first motor 210 and the second motor 310 reaches the obstacle removal stroke threshold, or an encoder can be arranged on the first motor 210 and the second motor 310, and the control module 400 can record the step distance according to the electrical signal fed back by the encoder, which represents the motor rotation angle or motor rotation stroke. When the step distance reaches the obstacle removal stroke threshold, the first motor 210 and the second motor 310 are controlled to reverse again. It can be understood that after the first motor 210 and the second motor 310 reverse again, the motor phase current of the first motor 210 and the second motor 310 is continuously acquired, and when the motor phase current is still higher than the first current threshold, the duration is recorded. After the duration reaches the time threshold, the reversing step is performed again. As long as the motor phase current does not reach the second current threshold, the control module 400 controls the crushing device to repeatedly cut the material, so as to achieve the crushing purpose, without too much manual intervention.
[0037] In some embodiments of the present application, the reversing step includes: The first motor 210 is controlled to rotate at a first rotation speed, and the second motor 310 is controlled to rotate at a second rotation speed, wherein the first rotation speed is greater than the second rotation speed. When the motor phase current is continuously higher than the first current threshold, it is proved that the material causes blockage to the first roller knife assembly 230 and the second roller knife assembly 330. At this time, the first motor 210 and the second motor 310 are controlled to operate at different speeds, thereby facilitating tearing and cutting of the material.
[0038] Due to the differential operation, the step distance of the first motor 210 with a faster rotation speed will first reach the obstacle removal stroke threshold, and the step distance of the second motor 310 with a slower rotation speed will not reach the obstacle removal stroke threshold. In the step of reversing the first motor 210 and the second motor 310 when the step distance reaches the obstacle removal stroke threshold, the reversing of the first motor 210 and the second motor 310 is controlled when the step distance of the first motor 210 and the second motor 310 both reaches the obstacle removal stroke threshold. When the step distance of the first motor 210 and the second motor 310 both reaches the obstacle removal stroke threshold, the first motor 210 and the second motor 310 are controlled to reverse again, so as to ensure that the first roller knife assembly 230 and the second roller knife assembly 330 can rotate enough to remove the fault as much as possible before reversing operation again.
[0039] In some embodiments of the present application, the reversing step further comprises: when the step distance of the first motor 210 reaches the obstacle-removing distance threshold, the first motor 210 is controlled to rotate at a second rotating speed until the step distance of the second motor 310 also reaches the obstacle-removing distance threshold. In the initial stage of the reversing step, the first motor 210 and the second motor 310 operate at different speeds, which can tear and cut the blocked material. When the step distance of the first motor 210 reaches the obstacle-removing distance threshold, the material blocking problem is basically solved, the first motor 210 and the second motor 310 operate at the same speed, and operate at a lower second rotating speed, which can further crush the material and solve the material winding problem. The first roller cutter assembly 230 and the second roller cutter assembly 330 cooperate with each other to ensure that both of them are free of faults.
[0040] In some embodiments of the present application, the obtaining motor phase current of the first motor 210 and the second motor 310 further comprises: When the rising value of the motor phase current in a unit time is greater than a change threshold, the first torque limiter 220 and the second torque limiter 320 are disengaged to disconnect the transmission of driving force between the first motor 210 and the first roller cutter assembly 230 and disconnect the transmission of driving force between the second motor 310 and the second roller cutter assembly 330.
[0041] Wherein, the unit time can be 1ms, 1s, etc., which is set by the manufacturer, and the change threshold is also set by the manufacturer according to the specifications of the motor. When the rising value of the motor phase current in a unit time is greater than the change threshold, a transient current spike is formed, which indicates that an uncuttable hard object is encountered. At this time, the first torque limiter 220 and the second torque limiter 320 need to be disengaged in time, thereby effectively protecting the first motor and the second motor.
[0042] In some embodiments of the present application, the control of the first motor 210 and the second motor 310 rotating comprises: The first motor 210 is controlled to rotate in a first rotating direction, and the second motor 310 is controlled to rotate in a second rotating direction, wherein the first rotating direction and the second rotating direction are opposite to each other, for example, the first motor 210 drives the first roller cutter assembly 230 to rotate in a clockwise direction, and the second motor 310 drives the second roller cutter assembly 330 to rotate in a counterclockwise direction; In the control of the first motor 210 and the second motor 310 executing the reversing step, it comprises: The first motor 210 is controlled to rotate in a third rotating direction, wherein the first rotating direction and the third rotating direction are opposite to each other; The second motor 310 is controlled to rotate in a fourth rotating direction, wherein the second rotating direction and the fourth rotating direction are opposite to each other.
[0043] For example, in the reversing step, the first motor 210 drives the first roller cutter assembly 230 to rotate in the counterclockwise direction, and the second motor 310 drives the second roller cutter assembly 330 to rotate in the clockwise direction.
[0044] After the reversing step ends, the first motor 210 and the second motor 310 are reversed again, and the first motor 210 resumes rotating in the clockwise direction, and the second motor 310 resumes rotating in the counterclockwise direction.
[0045] In some embodiments of the present application, the control of the rotation of the first motor 210 and the second motor 310 includes: First, the first motor 210 is controlled to rotate in a first direction, and after a buffer time interval, the second motor 310 is controlled to rotate in a second direction; In the reversing step, the control of the first motor 210 and the second motor 310 includes: The first motor 210 and the second motor 310 are simultaneously reversed.
[0046] In the initial stage of adding material, the first motor 210 can be controlled to rotate first, so that the material can smoothly enter the gap between the first roller cutter assembly 230 and the second roller cutter assembly 330. The buffer time can be set to several seconds to several tens of seconds, which is set by the user or the manufacturer. In the reversing step, in order to prevent excessive tearing between the first roller cutter assembly 230 and the second roller cutter assembly 330 and the material during non-synchronous rotation, which causes the motor phase current to instantaneously increase, the first motor 210 and the second motor 310 are controlled to be reversed synchronously.
[0047] According to the second embodiment of the present application, the crushing device includes: Figures 1 to 3As shown, the device includes a rack 100, a first crushing module 200, a second crushing module 300, a current detection module 410, and a control module 400, the rack 100 has a crushing cavity 110, the first crushing module 200 includes a first motor 210, a first torque limiter 220, and a first roller cutter assembly 230, the first roller cutter assembly 230 is rotatably arranged in the rack 100 and located in the crushing cavity 110, the first motor 210 is connected with the first roller cutter assembly 230 through the first torque limiter 220 to drive the first roller cutter assembly 230 to rotate, the second crushing module 300 includes a second motor 310, a second torque limiter 320, and a second roller cutter assembly 330, the second roller cutter assembly 330 is rotatably arranged in the rack 100 and located in the crushing cavity 110, the second motor 310 is connected with the second roller cutter assembly 330 through the second torque limiter 320 to drive the second roller cutter assembly 330 to rotate, the current detection module 410 is connected with the first motor 210 and the second motor 310 respectively to detect the motor phase current, the control module 400 is connected with the current detection module 410, the first motor 210, the first torque limiter 220, the second motor 310, and the second torque limiter 320 respectively, and the control module 400 executes the overload protection method disclosed in any of the above embodiments to control the first motor 210 and the second motor 310 to operate.
[0048] The crushing device, the control module 400 executes the overload protection method disclosed in any of the above embodiments to control the first motor 210 and the second motor 310 to operate, reasonable overload protection, improve crushing efficiency, reduce labor cost, at the same time, timely protection in emergency, reduce the probability of motor burning.
[0049] The control device according to the third aspect embodiment of the present application, the control device includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the overload protection method disclosed in the above embodiments.
[0050] The control device can be any intelligent terminal including a central computer, a remote device terminal computer, etc.
[0051] As Figure 4 shown, Figure 4 Another embodiment of the hardware structure of the control device is also shown, the control device includes: The processor 610 can be implemented by a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits, and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present application. The memory 620 can be implemented by a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 620 can store an operating system and other application programs. When the technical solutions provided by the embodiments of the present application are implemented by software or firmware, the related program codes are stored in the memory 620 and are called and executed by the processor 610 to implement the overload protection method of the embodiments of the present application. The input / output interface 630 is configured to realize information input and output. The communication interface 640 is configured to realize the communication interaction between the device and other devices. The communication can be realized by a wired manner (for example, a USB, a network cable, etc.) or a wireless manner (for example, a mobile network, WIFI, Bluetooth, etc.). The bus 650 is configured to transmit information between various components (for example, the processor 610, the memory 620, the input / output interface 630, and the communication interface 640) of the device, and can also access the smart Internet of Things through the bus. The processor 610, the memory 620, the input / output interface 630, and the communication interface 640 are connected to each other through the bus 650 to realize the communication connection between the device.
[0052] According to the computer readable storage medium of the fourth aspect of the embodiments of the present application, the computer readable storage medium stores a computer program. When the computer program is executed by the processor, the overload protection method disclosed in the above embodiments is realized.
[0053] The memory is a non-transitory computer readable storage medium, which can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory can optionally include a memory remotely arranged relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.
[0054] The embodiments described in the specification are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.
[0055] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than shown in the figures, or combine certain steps, or different steps.
[0056] The device embodiments described above are merely illustrative, and the units described as separate components can or can not be physically separated, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiments of the present application according to actual needs.
[0057] Those skilled in the art can understand that all or some of the steps in the above disclosed method, the functional modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.
[0058] The terms "first", "second", "third", "fourth" and the like (if any) in the specification of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0059] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and the scope of the rights of the embodiments of the present application is not limited thereto. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall be within the scope of the rights of the embodiments of the present application.
[0060] Each technical feature of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, it should be considered as the scope of the present disclosure.
[0061] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and application of the present application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.
Claims
1. An overload protection method applied to a crushing device, the crushing device comprising a frame, a first crushing module, a second crushing module, a current detection module and a control module, the frame having a crushing cavity, the first crushing module comprising a first motor, a first torque limiter and a first roller cutter assembly, the first roller cutter assembly being rotatably arranged on the frame and located in the crushing cavity, the first motor being connected with the first roller cutter assembly through the first torque limiter to drive the first roller cutter assembly to rotate, the second crushing module comprising a second motor, a second torque limiter and a second roller cutter assembly, the second roller cutter assembly being rotatably arranged on the frame and located in the crushing cavity, the second motor being connected with the second roller cutter assembly through the second torque limiter to drive the second roller cutter assembly to rotate, the current detection module being connected with the first motor and the second motor respectively to detect motor phase current, the control module being connected with the current detection module, the first motor, the first torque limiter, the second motor and the second torque limiter respectively, the control module executing the overload protection method, characterized in that, The overload protection method includes: Control the rotation of the first motor and the second motor, and obtain the motor phase current of the first motor and the second motor; When the current in any motor phase exceeds the first current threshold and the duration reaches the time threshold, control the first motor and the second motor to perform the reversal step. In the reversal step, when the current of any motor phase exceeds the second current threshold, the first torque limiter and the second torque limiter disengage to disconnect the transmission of driving force between the first motor and the first roller cutter assembly and to disconnect the transmission of driving force between the second motor and the second roller cutter assembly, wherein the second current threshold is greater than the first current threshold.
2. The overload protection method of claim 1, wherein, In the reversal step, the step strokes of the first motor and the second motor are recorded respectively. When the step stroke reaches the obstacle removal stroke threshold, the first motor and the second motor are controlled to reverse again.
3. An overload protection method according to claim 2, characterized in that, The reversal step includes: controlling a first motor to rotate at a first speed, and controlling a second motor to rotate at a second speed, wherein the first speed is greater than the second speed; The process of controlling the first and second motors to reverse again when the stepping stroke reaches the obstacle removal stroke threshold includes: Once the step strokes of both the first and second motors reach the obstacle-clearing stroke threshold, the first and second motors are controlled to reverse again.
4. An overload protection method according to claim 3, characterized in that, The reversal step also includes: Once the stepping stroke of the first motor reaches the obstacle removal stroke threshold, the first motor is controlled to rotate at the second speed until the stepping stroke of the second motor also reaches the obstacle removal stroke threshold.
5. The overload protection method of claim 1, wherein, After obtaining the phase currents of the first motor and the second motor, the method further includes: When the rise of the motor phase current within a unit time exceeds the change threshold, the first torque limiter and the second torque limiter disengage to disconnect the transmission of driving force between the first motor and the first roller cutter assembly, and to disconnect the transmission of driving force between the second motor and the second roller cutter assembly.
6. The method of claim 1, wherein, The control of the rotation of the first motor and the second motor includes: The first motor is controlled to rotate in a first direction, and the second motor is controlled to rotate in a second direction, wherein the first direction and the second direction are opposite to each other; The step of controlling the first motor and the second motor to perform the reverse rotation includes: The first motor is controlled to rotate in a third direction, wherein the first direction and the third direction are opposite to each other; The second motor is controlled to rotate in a fourth direction, wherein the second and fourth directions are opposite to each other.
7. An overload protection method according to claim 6, characterized in that, The control of the rotation of the first motor and the second motor includes: First, control the first motor to rotate in the first direction, and after a buffer time interval, control the second motor to rotate in the second direction. The step of controlling the first motor and the second motor to perform the reverse rotation includes: Control the first motor and the second motor to reverse simultaneously.
8. A crushing device, characterized in that The application relates to a kind of overload protection methods and control device of crusher, including rack, first crushing module, second crushing module, current detection module and control module, rack has crushing cavity, first crushing module includes first motor, first torque limiter and first roller cutter assembly, the first roller cutter assembly is rotatably arranged in the rack and is located in the crushing cavity, the first motor is connected with the first roller cutter assembly by first torque limiter to drive the first roller cutter assembly to rotate, second crushing module includes second motor, second torque limiter and second roller cutter assembly, the second roller cutter assembly is rotatably arranged in the rack and is located in the crushing cavity, the second motor is connected with the second roller cutter assembly by second torque limiter to drive the second roller cutter assembly to rotate, the current detection module is connected with the first motor and the second motor to detect motor phase current, the control module is connected with current detection module, first motor, first torque limiter, second motor and second torque limiter, the control module executes the overload protection method as claimed in any one of claims 1 to 7 to control first motor and second motor operation.
9. A control device characterized by comprising: The control device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the overload protection method of any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to realize the overload protection method of any one of claims 1 to 7.