Control method capable of automatically dealing with crusher cutter shaft jamming, crusher and system

Abstract

The application relates to the technical field of crushers, in particular to a control method capable of automatically dealing with the blocking of a crusher cutter shaft, a crusher and a system, wherein the crusher comprises two crushing shafts and two poking shafts; the crushing shafts are driven by hydraulic pressure, the poking shafts are driven by motors, and a pressure sensor is installed on the crushing shafts; when the hydraulic shafts are in high-pressure positive and reverse rotation, the pressure sensor is used for identification; when the motor shafts are in high-pressure positive and reverse rotation, the torque and current of the driving motor shaft frequency converter are used for identification. The control method can identify and remove the blockage by identifying the high pressure of the hydraulic shafts and the motor shafts, allowing the motor shafts and the hydraulic shafts to reverse or rotate positively, so that the blocking can be automatically removed.

Description

Technical Field

[0001] This application relates to the field of crusher technology, specifically to a control method and crusher / system that can automatically respond to crusher cutter shaft jamming. Background Technology

[0002] Crushing is the process of applying external force to the material being crushed, overcoming the cohesive forces between the material molecules, and breaking large pieces of material into smaller pieces. Crushing operations are classified according to the form of energy consumed, into mechanical energy crushing and non-mechanical energy crushing, such as electrical energy and thermal energy crushing. In industry, mechanical force is mainly used for crushing, and methods include: compression crushing, splitting, breaking, grinding, and impact crushing. Mechanical crushing is more suitable for crushing brittle and hard materials and is currently widely used in material handling processes in the mining and metallurgical industries. However, for materials with high toughness, such as rubber, the above-mentioned mechanical crushing methods are not effective in completing the crushing task.

[0003] A traditional four-shaft crusher consists of two hydraulically driven crushing shafts and two electrically driven feeding shafts. The hydraulically driven crushing shafts offer a wide speed range, high torque, strong load-bearing capacity, and the ability to crush materials in both forward and reverse rotation. The electrically driven feeding shafts offer a wide speed range, a simple drive mechanism, and low design cost while meeting crushing capacity requirements. During operation, the crusher primarily achieves material crushing through the combined effects of tearing, shearing, and compressing on the material caused by the rotation of the hydraulically driven cutter shafts. The electrically driven cutter shafts, rotating relative to the hydraulically driven shafts, also provide auxiliary shearing, but their primary function is to feed material to the hydraulically driven cutter shafts, enabling them to crush materials more efficiently. However, due to the complex composition of the materials being crushed, crushing difficult-to-crush materials can cause frequent high-pressure jamming of the crusher's cutter shafts, even leading to frequent shutdowns.

[0004] Therefore, there is currently a lack of a control method that can prevent the four-shaft crusher from automatically releasing the jam. Summary of the Invention

[0005] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0006] The following description and accompanying drawings fully illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of embodiments of the invention includes the entire scope of the claims and all available equivalents thereof. In this document, each embodiment may be referred to individually or collectively with the term "invention," which is merely for convenience and is not intended to automatically limit the scope of application to any single invention or inventive concept if more than one invention is disclosed. Relational terms such as "first" and "second" are used herein only to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the methods, products, etc., disclosed in the embodiments, since they correspond to the method section disclosed in the embodiments, the descriptions are relatively simple; relevant details can be found in the method section description.

[0007] This disclosure provides a control method, crusher, and system for automatically responding to crusher cutter shaft jamming, enabling the crusher to automatically release the jamming.

[0008] This disclosure provides a crusher capable of automatically responding to cutter shaft jamming, applied to a crusher, the crusher having two motor-driven feeding shafts and two hydraulically driven crushing shafts; the control method includes:

[0009] Preparation phase:

[0010] S110, the motor shaft reverses for the first preset time of reverse rotation;

[0011] S120, the hydraulic shaft and the motor shaft start in reverse simultaneously;

[0012] S130, adjusts the preparation stage operation of the crusher according to the reverse running state of the hydraulic shaft;

[0013] Fragmentation stage:

[0014] S210, preset time for the first forward rotation of the hydraulic shaft;

[0015] S220, the hydraulic shaft and the motor shaft start rotating forward simultaneously;

[0016] S230 adjusts the crushing stage operation of the crusher according to the forward rotation status of the hydraulic shaft.

[0017] Preferably, S130 adjusts the preparation stage operation of the crusher according to the reverse rotation state of the hydraulic shaft, including:

[0018] S131, during the simultaneous reverse rotation of the motor shaft and the hydraulic shaft, real-time identification of whether the hydraulic shaft encounters high pressure;

[0019] S132, if high pressure is encountered, the motor shaft and hydraulic shaft will stop simultaneously to handle the high pressure problem and return to S120;

[0020] S133, if no high pressure is encountered, determine whether it is the first start-up and reverse rotation of the motor shaft and hydraulic shaft at the same time;

[0021] S134, if the motor shaft and hydraulic shaft start reversing simultaneously for the first time, then the motor shaft and hydraulic shaft reverse simultaneously for the second preset time, and continue;

[0022] S135, if the motor shaft and hydraulic shaft do not start reversing simultaneously for the first time, then the motor shaft and hydraulic shaft will reverse simultaneously for the third preset time, and continue.

[0023] Preferably, S130, adjusting the preparation stage operation of the crusher according to the reverse rotation state of the hydraulic shaft, further includes:

[0024] S136, the motor shaft and hydraulic shaft stop for the first preset interval time.

[0025] Preferably, S230 adjusts the crushing stage operation of the crusher according to the forward rotation state of the hydraulic shaft, including:

[0026] S231, during the simultaneous forward rotation of the motor shaft and hydraulic shaft, real-time identification of whether the motor shaft and hydraulic shaft encounter high pressure;

[0027] S232, if neither the hydraulic shaft nor the motor shaft encounters high pressure, the motor shaft and the hydraulic shaft stop for a second preset interval time and execute the crushing cycle process, wherein the crushing cycle process includes the hydraulic shaft and the motor shaft running simultaneously for a second preset forward rotation time and stopping for a third preset interval time;

[0028] S233, If the hydraulic shaft encounters high pressure, the hydraulic shaft stops for the fourth preset interval time and executes the preparation phase;

[0029] S234 If the motor shaft encounters high pressure, the hydraulic shaft will continue to rotate forward. In this case, reverse rotation will be executed first, followed by forward rotation, to execute the crushing cycle process.

[0030] Preferably, in S234, the reverse rotation is performed first, followed by the forward rotation, including:

[0031] The motor shaft first stops for a fourth preset interval, then reverses for a third preset interval, then stops for a fifth preset interval, and then resumes forward rotation.

[0032] Preferably, the range of the first reverse preset time, the second reverse preset time, and the third reverse preset time is 2 to 10 seconds.

[0033] Secondly, the present disclosure provides a crusher capable of automatically responding to jamming, comprising a chassis, a frame, and a cutter roller assembly, wherein the chassis and the cutter roller assembly are both mounted on the frame, and the cutter roller assembly includes two crushing shafts and two feeding shafts; the crushing shafts are hydraulically driven, and the feeding shafts are electrically driven, applied to the aforementioned control method for automatically responding to jamming.

[0034] Preferably, the crusher further includes a dust removal device.

[0035] Preferably, the crusher further includes: a movable screen plate disposed below the crushing shaft and the feeding shaft, the movable screen plate being provided with screen holes for screening the crushed material.

[0036] In some embodiments, a control system for automatically responding to crusher cutter shaft jamming is disclosed, the control system comprising:

[0037] The preparation module is configured to start the crusher in preparation phase by reversing the motor shaft for a preset time, and simultaneously reversing the hydraulic shaft and motor shaft. The operation of the crusher is adjusted according to the reversing state of the hydraulic shaft.

[0038] The crushing module is configured to start the first forward rotation of the hydraulic shaft after a preset time. The hydraulic shaft and the motor shaft start rotating forward simultaneously. The preparation stage of the crusher is adjusted according to the forward rotation status of the hydraulic shaft.

[0039] This disclosure provides a control method, crusher, and system for automatically responding to crusher cutter shaft jamming. In the crusher, the hydraulic shaft encounters high pressure during forward and reverse rotation via a pressure sensor, and the electric shaft encounters high pressure during forward and reverse rotation via the torque and current of the drive electric shaft frequency converter. The control method identifies and clears blockages by continuously reversing or forward rotating the electric and hydraulic shafts to detect high pressure on the hydraulic and electric shafts, thereby automatically releasing the jamming. Attached Figure Description

[0040] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0041] Figure 1 This is a schematic diagram of a crusher that can automatically respond to crusher cutter shaft jamming, provided by an embodiment of this disclosure;

[0042] Figure 2 This is a flowchart of a control method for a crusher provided in an embodiment of this disclosure;

[0043] Figure 3 This is a flowchart of the preparation stage in a control method provided in this embodiment;

[0044] Figure 4 This is a flowchart of the crushing stage in a control method provided in this embodiment;

[0045] Figure 5 This is a schematic diagram of a control system that can automatically respond to the jamming of the cutter shaft of a crusher, provided in an embodiment of this disclosure;

[0046] Figure label:

[0047] 1: Hydraulic shaft; 2: Motor shaft. Detailed Implementation

[0048] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0049] The following description and accompanying drawings fully illustrate specific embodiments of this application to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of embodiments of this application includes the entire scope of the claims and all available equivalents of the claims. In this document, each embodiment may be referred to individually or collectively by the term "application," which is merely for convenience and is not intended to automatically limit the scope of the application to any single application or application concept if more than one application is disclosed in fact. In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the methods, products, etc., disclosed in the embodiments, since they correspond to the method section disclosed in the embodiments, the descriptions are relatively simple; relevant details can be found in the method section description.

[0050] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0051] A traditional four-shaft crusher consists of two hydraulically driven crushing shafts and two electrically driven feeding shafts. The hydraulically driven crushing shafts offer a wide speed range, high torque, strong load-bearing capacity, and the ability to crush materials in both forward and reverse rotation. The electrically driven feeding shafts offer a wide speed range, a simple drive mechanism, and low design cost while meeting crushing capacity requirements. During operation, the crusher primarily achieves material crushing through the combined effects of tearing, shearing, and compressing on the material caused by the rotation of the hydraulically driven cutter shafts. The electrically driven cutter shafts, rotating relative to the hydraulically driven shafts, also provide auxiliary shearing, but their primary function is to feed material to the hydraulically driven cutter shafts, enabling them to crush materials more efficiently. In practical applications, due to the complex composition of the materials to be crushed, crushing difficult-to-crush materials can cause frequent high-pressure jamming of the crusher cutter shafts, even leading to frequent shutdowns.

[0052] Therefore, there is currently a lack of a control method that can prevent the four-shaft crusher from automatically releasing the jam.

[0053] See Figure 1 This disclosure provides a crusher capable of automatically responding to cutter shaft jamming. The crusher includes a housing, a frame, and a cutter roller assembly, wherein the housing and cutter roller assembly are both mounted on the frame. The cutter roller assembly includes two crushing shafts and two feeding shafts; the crushing shafts are hydraulically driven shafts, and the feeding shafts are motor-driven shafts. Pressure sensors are installed on the crushing shafts.

[0054] It should be understood that the speeds of both hydraulic shafts 1 and motor shafts 2 are adjustable over a wide range. When hydraulic shaft 1 encounters high pressure during forward and reverse rotation, this is achieved through real-time rapid detection using pressure sensors. Similarly, when motor shaft 2 encounters high pressure during forward and reverse rotation, this is achieved through real-time rapid detection of the torque and current of the drive motor shaft's frequency converter. During the identification process, high pressure, torque, and current can be set as parameters according to actual conditions.

[0055] Correspondingly, combined Figure 2 As shown in the embodiments of this disclosure, a control method for a crusher is provided, including:

[0056] Preparation phase:

[0057] S110, the motor shaft 2 reverses for the first preset time.

[0058] It should be understood that the preset time for the first reverse rotation of motor shaft 2 is to allow material to be fed to hydraulic shaft 1 for crushing. In addition, motor shaft 2 has poor load-bearing capacity at startup, so motor shaft 2 is started in reverse first, and then all four cutter shafts are started simultaneously.

[0059] S120, hydraulic shaft 1 and motor shaft 2 start in reverse simultaneously.

[0060] It should be understood that the simultaneous reverse rotation of the four cutter shafts is to clear out excessively large materials between the crusher's cutter shafts and the screen after crushing. Excessively large materials cannot pass through the screen after crushing, and their accumulation over time will affect the material throughput, potentially clogging the screen completely. Therefore, the shafts need to reverse to use the cutter teeth to bring the material back up for further crushing until it reaches the correct size and can pass through the screen normally.

[0061] S130 adjusts the preparation stage operation of the crusher according to the reverse operation state of hydraulic shaft 1.

[0062] See Figure 3 This is a schematic diagram of a specific preparation stage. S130, adjusting the preparation stage operation of the crusher according to the reverse operation state of hydraulic shaft 1, including:

[0063] S130, adjusts the preparation stage operation of the crusher according to the reverse running state of hydraulic shaft 1, including:

[0064] S131, during the simultaneous reverse rotation of motor shaft 2 and hydraulic shaft 1, real-time identification is made to determine whether hydraulic shaft 1 is encountering high pressure.

[0065] S132, if high pressure is encountered, motor shaft 2 and hydraulic shaft 1 will stop simultaneously to handle the high pressure problem and return to S120.

[0066] It should be understood that handling high-pressure issues, in practical applications, involves removing obstructed materials.

[0067] S133, if no high pressure is encountered, determine whether it is the first start-up and reverse rotation of motor shaft 2 and hydraulic shaft 1 at the same time;

[0068] S134, if the motor shaft 2 and hydraulic shaft 1 start reversing simultaneously for the first time, then the motor shaft 2 and hydraulic shaft 1 reverse simultaneously for the second preset time, and continue;

[0069] S135, if the motor shaft 2 and hydraulic shaft 1 do not start reversing simultaneously for the first time, then the motor shaft 2 and hydraulic shaft 1 will reverse simultaneously for the third preset time, and continue.

[0070] The purpose of determining whether it is the first simultaneous reverse start of motor shaft 2 and hydraulic shaft 1 is to distinguish the duration of the first and non-first reverse starts. If it is the first reverse start, the time for the simultaneous reverse start of motor shaft 2 and hydraulic shaft 1 is often longer than the time for non-first reverse starts, that is, the preset time for the second reverse start is longer than the preset time for the third reverse start.

[0071] S136, the motor shaft 2 and the hydraulic shaft 1 stop for the first preset interval time.

[0072] The first interval is set as a rest time for the crusher during the preparation stage, and then it can continue to run in the forward direction.

[0073] Fragmentation stage:

[0074] S210, the hydraulic shaft 1 rotates forward for the first preset time.

[0075] It should be understood that during the crushing stage, hydraulic shaft 1 rotates forward first. Hydraulic shaft 1 is mainly for cutting and shearing materials, while motor shaft 2 is mainly for feeding. Hydraulic shaft 1 shears first and then motor shaft 2 feeds the material, which helps to reduce the overload of hydraulic shaft 1 when the crushing is just started.

[0076] S220, hydraulic shaft 1 and motor shaft 2 start rotating forward simultaneously.

[0077] S230 adjusts the crushing stage operation of the crusher according to the forward rotation status of hydraulic shaft 1.

[0078] See Figure 4 This is a schematic diagram illustrating a specific crushing stage. S230, based on the forward rotation of hydraulic shaft 1, adjusts the crushing stage operation of the crusher, including:

[0079] S231, during the simultaneous forward rotation of motor shaft 2 and hydraulic shaft 1, real-time identification is made to determine whether motor shaft 2 and hydraulic shaft 1 encounter high pressure;

[0080] S232, if neither the hydraulic shaft 1 nor the motor shaft 2 encounters high pressure, then the motor shaft 2 and the hydraulic shaft 1 stop for a second preset interval and execute the crushing cycle process, wherein the crushing cycle process includes the hydraulic shaft 1 and the motor shaft 2 running simultaneously for a second preset forward rotation time and stopping for a third preset interval.

[0081] It should be noted that entering the crushing cycle process, that is, executing the crushing task, is performed periodically: the hydraulic shaft 1 and the motor shaft 2 rotate forward and pause simultaneously.

[0082] S233, if hydraulic shaft 1 encounters high pressure, hydraulic shaft 1 stops for the fourth preset interval time and executes the preparation stage.

[0083] If hydraulic shaft 1 encounters high pressure, it indicates that there is still obstruction, and the obstruction needs to be resolved again from the preparation stage.

[0084] S234, if the motor shaft 2 encounters high pressure, the hydraulic shaft 1 will continue to rotate forward. Then, reverse rotation will be executed first, followed by forward rotation, to execute the crushing cycle process.

[0085] If motor shaft 2 encounters high pressure, but hydraulic shaft 1 continues to rotate forward, it indicates that hydraulic shaft 1, which mainly performs the crushing task, is not obstructed and can continue. If motor shaft 2 encounters high pressure, motor shaft 2 can remove the obstruction itself, without delaying the operation of hydraulic shaft 1. Specifically, motor shaft 2 first stops for a fourth preset interval, then reverses for a third preset forward rotation time, then stops for a fifth preset interval, and then resumes forward rotation.

[0086] It should be noted that, in this application, "the hydraulic shaft 1 encountering high pressure" refers to any one of the two hydraulic shafts 1 encountering high pressure, not that both hydraulic shafts 1 encounter high pressure. Similarly, "the motor shaft 2 encountering high pressure" refers to any one of the two motor shafts 2 encountering high pressure, not that both motor shafts 2 encounter high pressure.

[0087] In this application, all preset times are set according to actual conditions. Generally, the preset time ranges from 2 to 30 seconds.

[0088] In a preferred embodiment of the crusher, the crusher further includes a dust removal device. The crusher generates a large amount of dust during operation. The dust removal device can be a water spray device to remove dust from the crusher.

[0089] In a preferred embodiment of the crusher, the crusher further includes: a movable screen plate disposed below the crushing shaft and the feeding shaft, the movable screen plate being provided with screen holes for sieving the crushed material. Material particles smaller than the screen holes pass through the screen, while material larger than the screen holes is fed back by the feeding blades and then fed back to the crushing blades for further crushing, until the crushed material passes through the screen.

[0090] Figure 5 A control system for automatically responding to crusher cutter shaft jamming is shown, the control system comprising:

[0091] The startup module is configured to start the first motor;

[0092] The output torque acquisition module is configured to acquire the output torque of the first motor via the first motor frequency converter.

[0093] The output torque module is configured to send the output torque of the first motor to the second motor inverter.

[0094] The input torque module is configured to use the output torque of the first motor as the input torque of the second motor to start the second motor.

[0095] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0096] Those skilled in the art will recognize that the system and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the apparatuses, devices, and systems described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0097] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based device that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for automatically responding to cutter shaft jamming in a crusher, characterized in that: Applied to a crusher, the crusher has two motor-driven feeding shafts and two hydraulically driven crushing shafts, on which pressure sensors are installed; The control method includes: Preparation phase: S110, the motor shaft reverses for the first preset time of reverse rotation; S120, the hydraulic shaft and the motor shaft start in reverse simultaneously; S130, adjusts the preparation stage operation of the crusher according to the reverse running state of the hydraulic shaft; S130 adjusts the crusher's preparation stage operation based on the reverse rotation of the hydraulic shaft, including: S131, during the simultaneous reverse rotation of the motor shaft and the hydraulic shaft, real-time identification of whether the hydraulic shaft encounters high pressure; S132, if high pressure is encountered, the motor shaft and hydraulic shaft will stop simultaneously to handle the high pressure problem and return to S120; S133, if no high pressure is encountered, determine whether it is the first start-up and reverse rotation of the motor shaft and hydraulic shaft at the same time; S134, if the motor shaft and hydraulic shaft start reversing simultaneously for the first time, then the motor shaft and hydraulic shaft reverse simultaneously for the second preset time, and continue; S135, if the motor shaft and hydraulic shaft do not start reversing simultaneously for the first time, then the motor shaft and hydraulic shaft will reverse simultaneously for the third preset time, and continue; Fragmentation stage: S210, preset time for the first forward rotation of the hydraulic shaft; S220, the hydraulic shaft and the motor shaft start rotating forward simultaneously; S230 adjusts the crushing stage operation of the crusher according to the forward rotation status of the hydraulic shaft; S230 adjusts the crushing stage operation of the crusher according to the forward rotation status of the hydraulic shaft, including: S231, during the simultaneous forward rotation of the motor shaft and hydraulic shaft, real-time identification of whether the motor shaft and hydraulic shaft encounter high pressure; S232, if neither the hydraulic shaft nor the motor shaft encounters high pressure, the motor shaft and the hydraulic shaft stop for a second preset interval time and execute the crushing cycle process, wherein the crushing cycle process includes the hydraulic shaft and the motor shaft running simultaneously for a second preset forward rotation time and stopping for a third preset interval time; S233, If the hydraulic shaft encounters high pressure, the hydraulic shaft stops for the fourth preset interval time and executes the preparation phase; S234 If the motor shaft encounters high pressure, the hydraulic shaft will continue to rotate forward. In this case, the motor shaft will first reverse and then rotate forward to execute the crushing cycle process.

2. The control method for automatically responding to crusher cutter shaft jamming according to claim 1, characterized in that: S130, which adjusts the crusher's preparation stage operation based on the reverse rotation of the hydraulic shaft, also includes: S136, the motor shaft and hydraulic shaft stop for the first preset interval time.

3. The control method for automatically responding to crusher cutter shaft jamming according to claim 1, characterized in that: The process in S234, which involves performing the reverse rotation first and then the forward rotation, includes: The motor shaft first stops for a fourth preset interval, then reverses for a third preset interval, then stops for a fifth preset interval, and then resumes forward rotation.

4. The control method for automatically responding to crusher cutter shaft jamming according to claim 3, characterized in that: The preset times for the first, second, and third reversals are all within the range of 2 to 10 seconds.

5. A crusher capable of automatically responding to jamming, comprising a casing, a frame, and a cutter roller assembly, wherein, The aforementioned chassis and cutter roller assembly are both mounted on a frame, characterized in that: the cutter roller assembly includes two crushing shafts and two feeding shafts; the crushing shafts are hydraulically driven, the feeding shafts are electrically driven, pressure sensors are installed on the crushing shafts, and the crusher is applied to the control method for automatically responding to crusher cutter shaft jamming as described in any one of claims 1 to 4.

6. The crusher capable of automatically responding to jamming according to claim 5, characterized in that: The crusher also includes a dust removal device.

7. The crusher capable of automatically responding to jamming according to claim 5, characterized in that: The crusher also includes a movable screen plate disposed below the crushing shaft and the feeding shaft, the movable screen plate being provided with screen holes for screening the crushed material.

8. A control system capable of automatically responding to crusher cutter shaft jamming, characterized in that: The control system includes: The preparation module is configured to start the crusher's preparation phase by simultaneously reversing the motor shaft and the hydraulic shaft after a first preset time of reverse rotation. The adjustment of the crusher's preparation phase operation is based on the reverse rotation status of the hydraulic shaft. This adjustment includes: during the simultaneous reverse rotation of the motor and hydraulic shafts, real-time identification of whether the hydraulic shaft encounters high pressure; if high pressure is encountered, both the motor and hydraulic shafts stop simultaneously to address the high pressure issue, and the process returns to the simultaneous reverse rotation start; if no high pressure is encountered, it determines whether this is the first simultaneous reverse rotation start of both the motor and hydraulic shafts; if it is, the reverse rotation continues for a second preset time; if it is not the first simultaneous reverse rotation start, the reverse rotation continues for a third preset time. The crushing module is configured to operate with the hydraulic shaft rotating forward for a first preset time, with both the hydraulic shaft and motor shaft starting to rotate forward simultaneously. The crushing stage operation is adjusted based on the forward rotation status of the hydraulic shaft. This adjustment includes: real-time identification of whether the motor shaft and hydraulic shaft encounter high pressure during simultaneous forward rotation; if neither the hydraulic shaft nor the motor shaft encounters high pressure, the motor shaft and hydraulic shaft stop for a second preset time interval and execute the crushing cycle process, which includes the hydraulic shaft and motor shaft operating simultaneously for the second preset time, stopping for a third preset time interval; if the hydraulic shaft encounters high pressure, the hydraulic shaft stops for a fourth preset time interval and executes the preparation stage; if the motor shaft encounters high pressure, the hydraulic shaft will continue to rotate forward, in which case the motor shaft will first reverse and then rotate forward again to execute the crushing cycle process.

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