Double-shaft crusher, energy recovery control method and device and storage medium
By designing a dual-shaft crusher and employing energy recovery control methods, and utilizing a DC bus and frequency converter module to control the motor's inertial power generation, the problems of high energy consumption and high maintenance costs of existing crushers have been solved, achieving efficient crushing and low-energy crushing effects.
Patent Information
- Application Number
- CN202510774557.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-10-17
Smart Images
Figure CN120790323A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of waste treatment equipment, in particular to a double-shaft crusher and an energy recovery control method, a control device and a storage medium. BACKGROUND
[0002] The crusher is increasingly applied in the fields of large garbage crushing, biomass energy production, household garbage manufacturing of alternative fuels and other solid waste treatment. The crusher is usually provided with a roller cutter assembly, which includes a rotating roller rotatably arranged on a rack and a plurality of rotating blades arranged along the length direction of the rotating roller. A plurality of fixed knives are fixedly arranged in the crushing cavity of the rack. The rotating blades and the fixed knives are arranged in a staggered manner. The rotating blades and the fixed knives are cooperatively sheared and torn to realize the crushing of solid waste.
[0003] The crusher mainly uses a hydraulic motor to drive the rotating roller. The reason is that the crusher needs a large torque output, and the rotating roller needs to be reversed every certain time (for example, 10-20 seconds) to prevent excessive force from causing blade damage when locked, and to rearrange the accumulation of waste in the crushing cavity, improve the crushing efficiency and optimize the crushing effect of waste. However, the hydraulic motor has high maintenance cost, low reliability, high energy consumption, and environmental pollution problems such as oil leakage.
[0004] Some manufacturers also try to use motors to replace traditional hydraulic motors. However, the rotating direction needs to be switched, so the motor needs to be started and braked constantly. When the motor is braked, the motor needs to be decelerated, and the energy in the motor is consumed by using a braking resistor. Compared with using a brake device to decelerate the motor, the wear of the parts can be reduced. However, due to the large rotational inertia of the rotating roller, the braking frequency is high, and the braking process requires a short time. It is difficult to avoid the generation of a large amount of heat in the resistor body for a long time, which leads to resistor body damage and high power consumption, and the energy efficiency is low. SUMMARY
[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a double-shaft crusher and an energy recovery control method, a control device and a storage medium, which improve the crushing efficiency and optimize the crushing effect of waste, and improve the energy utilization efficiency and reduce the energy consumption cost.
[0006] According to the first aspect of the embodiment of the present application, a double-shaft crusher comprises a frame having a crushing cavity; a first crushing module comprising a first motor and a first roller cutter assembly, the first motor being arranged on the frame, 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 to drive the first roller cutter assembly to rotate; a second crushing module comprising a second motor and a second roller cutter assembly, the second motor being arranged on the frame, 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 to drive the second roller cutter assembly to rotate; a drive module comprising a DC bus, a first frequency conversion module and a second frequency conversion module, the first frequency conversion module being connected with the DC bus and the first motor respectively, the second frequency conversion module being connected with the DC bus and the second motor respectively; and a control module connected with the first frequency conversion module and the second frequency conversion module respectively, the DC bus being capable of supplying power to the first motor through the first frequency conversion module to drive the first motor to start running, the first motor being capable of generating power through deceleration to supply power to the DC bus through the first frequency conversion module, the DC bus being capable of supplying power to the second motor through the second frequency conversion module to drive the second motor to start running, and the second motor being capable of generating power through deceleration to supply power to the DC bus through the second frequency conversion module.
[0007] According to the double-shaft crusher of the embodiment of the present application, at least the following beneficial effects are achieved.
[0008] The double-shaft crusher has the frame arranged with the first crushing module and the second crushing module, the first crushing module and the second crushing module can both run to crush waste, the first motor drives the first roller cutter assembly to rotate, the second motor drives the second roller cutter assembly to rotate, after the first motor runs for a certain period of time, the first motor can be decelerated and braked, and then rotates in the opposite direction after stopping, during the deceleration and braking of the first motor, the DC bus stops supplying power to the first motor, the first motor keeps rotating due to inertia and generates power, the generated power can be output to the DC bus through the first frequency conversion module, and during this period, the second motor keeps running, power can be provided to the second motor through the DC bus, similarly, after the second motor runs for a certain period of time, the second motor can be decelerated and braked, and then rotates in the opposite direction after stopping, during the deceleration and braking of the second motor, the DC bus stops supplying power to the second motor, the second motor keeps rotating due to inertia and generates power, the generated power can be output to the DC bus through the second frequency conversion module, and during this period, the first motor keeps running, power can be provided to the first motor through the DC bus, it can be seen that the design improves the crushing efficiency and optimizes the crushing effect of waste, and improves the energy utilization efficiency and reduces the energy consumption cost.
[0009] According to some embodiments of the present application, the drive module further comprises a braking resistance module, the first frequency conversion module and the second frequency conversion module are connected with the braking resistance module, and the DC bus can be discharged through the braking resistance module to consume energy.
[0010] According to the energy recovery control method of the second aspect of the present application, the energy recovery control method is applied to the double-shaft crusher disclosed in any of the above embodiments, and the control module controls the first frequency conversion module and the second frequency conversion module to operate to realize the energy recovery control method. The energy recovery control method comprises: the DC bus supplies power to the first motor to drive the first motor to rotate, the DC bus supplies power to the second motor to drive the second motor to rotate, and the first continuous running time of the first motor and the second continuous running time of the second motor are recorded respectively; when the first continuous running time exceeds the first time threshold, the first frequency conversion module is controlled to act to stop the DC bus from supplying power to the first motor, and the first motor generates power at a reduced speed to supply power to the DC bus until the rotation speed of the first motor is zero, the first frequency conversion module is controlled to act to restore the DC bus to supply power to the first motor, and the first motor is driven to change the rotation direction to rotate again and record the first continuous running time of the first motor again; when the second continuous running time exceeds the second time threshold, the second frequency conversion module is controlled to act to stop the DC bus from supplying power to the second motor, and the second motor generates power at a reduced speed to supply power to the DC bus until the rotation speed of the second motor is zero, the second frequency conversion module is controlled to act to restore the DC bus to supply power to the second motor, and the second motor is driven to change the rotation direction to rotate again and record the second continuous running time of the second motor again; wherein when the first continuous running time reaches the first time threshold and the second motor is generating power at a reduced speed, the step of controlling the first frequency conversion module to act to stop the DC bus from supplying power to the first motor is not triggered until the DC bus supplies power to the second motor again, and when the second continuous running time reaches the second time threshold and the first motor is generating power at a reduced speed, the step of controlling the second frequency conversion module to act to stop the DC bus from supplying power to the second motor is not triggered until the DC bus supplies power to the first motor again.
[0011] According to the energy recovery control method of the present application, at least the following beneficial effects are achieved:
[0012] In the energy recovery control method of the present application, in the process of the first motor decelerating and braking, the first motor generates power due to inertia and keeps rotating, and the generated power can be output to the DC bus through the first frequency conversion module, and during this period, the second motor keeps running. Similarly, in the process of the second motor decelerating and braking, the DC bus stops supplying power to the second motor, the second motor generates power due to inertia and keeps rotating, and the generated power can be output to the DC bus through the second frequency conversion module, and during this period, the first motor keeps running. This design improves the crushing efficiency and optimizes the crushing effect on waste, and improves the energy utilization efficiency and reduces the energy consumption cost.
[0013] According to some embodiments of the present application, the energy recovery control method further comprises: obtaining a first working current of the first motor, when the first working current is greater than a first current threshold, controlling the first frequency conversion module to act to stop the DC bus from supplying power to the first motor, and the first motor generates electricity at a reduced speed to supply power to the DC bus until the first motor stops rotating, controlling the first frequency conversion module to act to restore the DC bus to supply power to the first motor, and driving the first motor to change the rotating direction to rotate again and record the first continuous running time of the first motor again.
[0014] According to some embodiments of the present application, the energy recovery control method further comprises: obtaining a second working current of the second motor, when the second working current is greater than a second current threshold, controlling the second frequency conversion module to act to stop the DC bus from supplying power to the second motor, and the second motor generates electricity at a reduced speed to supply power to the DC bus until the second motor stops rotating, controlling the second frequency conversion module to act to restore the DC bus to supply power to the second motor, and driving the second motor to change the rotating direction to rotate again and record the second continuous running time of the second motor again.
[0015] According to some embodiments of the present application, the drive module further comprises a braking resistor module, the first frequency conversion module and the second frequency conversion module are connected with the braking resistor module, and the energy recovery control method further comprises: when the first working current is greater than the first current threshold and the second working current is greater than the second current threshold, controlling the first frequency conversion module to act to stop the DC bus from supplying power to the first motor, and the first motor generates electricity at a reduced speed to supply power to the DC bus, and controlling the second frequency conversion module to act to stop the DC bus from supplying power to the second motor, and the second motor generates electricity at a reduced speed to supply power to the DC bus; the DC bus discharges through the braking resistor module to consume energy.
[0016] According to some embodiments of the present application, the energy recovery control method further comprises: obtaining a resistance temperature of the braking resistor module, when the resistance temperature reaches a temperature threshold, stopping the DC bus from supplying power to the first motor and the second motor.
[0017] According to some embodiments of the present application, the drive module further comprises a braking resistor module, the first frequency conversion module and the second frequency conversion module are connected with the braking resistor module, and the energy recovery control method further comprises: obtaining a bus voltage of the DC bus, when the bus voltage is greater than a bus voltage threshold, the DC bus discharges through the braking resistor module to consume energy.
[0018] The control device according to the third aspect of the embodiments of the present application comprises a memory and a processor, the memory stores a computer program, and the processor implements the energy recovery control method disclosed in any of the embodiments when executing the computer program.
[0019] According to a computer readable storage medium of the fourth aspect of the embodiments 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 energy recovery control method disclosed in any of the above embodiments.
[0020] Additional aspects and advantages of the present application will be made apparent from the following description of the embodiments of the present application, which will be given by way of example only. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of the embodiments of the present application, taken in conjunction with the accompanying drawings.
[0022] Figure 1 A perspective view of one embodiment of the double-shaft crusher of the present application;
[0023] Figure 2 A schematic block diagram of the principle structure of one embodiment of the double-shaft crusher of the present application;
[0024] Figure 3 A flow chart of one embodiment of the energy recovery control method of the present application;
[0025] Figure 4 A power supply schematic diagram of the first working state of one embodiment of the energy recovery control method of the present application;
[0026] Figure 5 A power supply schematic diagram of the second working state of one embodiment of the energy recovery control method of the present application;
[0027] Figure 6 A power supply schematic diagram of the third working state of one embodiment of the energy recovery control method of the present application;
[0028] Figure 7 A power supply schematic diagram of the fourth working state of one embodiment of the energy recovery control method of the present application;
[0029] Figure 8 An electrical schematic diagram of one embodiment of the first frequency conversion module of the double-shaft crusher of the present application;
[0030] Figure 9 A schematic block diagram of the principle structure of one embodiment of the control device of the present application.
[0031] REFERENCE NUMERALS:
[0032] Rack 100; crushing cavity 110; fixed knife 120; first crushing module 200; first motor 210; first speed reducer 220; first roller knife assembly 230; first rotating roller 231; first rotating blade 232; second crushing module 300; second motor 310; second speed reducer 320; second roller knife assembly 330; second rotating roller 331; second rotating blade 332; control module 410; drive module 420; DC bus 421; first frequency conversion module 422; second frequency conversion module 423; braking resistance module 430; processor 610; memory 620; input / output interface 630; communication interface 640; bus 650. DETAILED DESCRIPTION
[0033] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.
[0034] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be executed in a manner different from the module division in the device or the sequence in the flowchart. The terms "first", "second", etc. in the specification and claims and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.
[0035] 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 the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.
[0036] As Figures 1 to 2As shown, according to the first aspect embodiment of the application, a double-shaft crusher comprises a frame 100, a first crushing module 200, a second crushing module 300, a driving module 420 and a control module 410, the frame 100 has a crushing cavity 110, the first crushing module 200 comprises a first motor 210 and a first roller cutter assembly 230, the first motor 210 is arranged on the frame 100, the first roller cutter assembly 230 is rotatably arranged on the frame 100 and located in the crushing cavity 110, the first motor 210 is connected with the first roller cutter assembly 230 to drive the first roller cutter assembly 230 to rotate, the second crushing module 300 comprises a second motor 310 and a second roller cutter assembly 330, the second motor 310 is arranged on the frame 100, the second roller cutter assembly 330 is rotatably arranged on the frame 100 and located in the crushing cavity 110, the second motor 310 is connected with the second roller cutter assembly 330 to drive the second roller cutter assembly 330 to rotate, the driving module 420 comprises a DC bus 421, a first frequency conversion module 422 and a second frequency conversion module 423, the first frequency conversion module 422 is connected with the DC bus 421 and the first motor 210 respectively, the second frequency conversion module 423 is connected with the DC bus 421 and the second motor 310 respectively, the control module 410 is connected with the first frequency conversion module 422 and the second frequency conversion module 423 respectively, the DC bus 421 can supply power to the first motor 210 through the first frequency conversion module 422 to drive the first motor 210 to start running, the first motor 210 can supply power to the DC bus 421 through the first frequency conversion module 422 by generating electricity at a reduced speed, the DC bus 421 can supply power to the second motor 310 through the second frequency conversion module 423 to drive the second motor 310 to start running, the second motor 310 can supply power to the DC bus 421 through the second frequency conversion module 423 by generating electricity at a reduced speed.
[0037] wherein, as Figure 1As shown, the rack 100 can be enclosed by sheet metal parts, and a crushing cavity 110 with a waste adding port at the top is formed, the first roller cutter assembly 230 includes a first rotating roller 231 and a plurality of first rotating blades 232 arranged along the length direction of the first rotating roller 231, the first motor 210 can be connected with the first rotating roller 231 through the first speed reducer 220 to drive the first rotating roller 231 to rotate, a plurality of fixed knives 120 can be arranged in the inner wall of the crushing cavity 110, the first rotating blades 232 and the fixed knives 120 are arranged in a staggered manner, and the first rotating blades 232 and the fixed knives 120 are cooperated to shear and tear to realize the crushing of solid waste. Similarly, the second roller cutter assembly 330 includes a second rotating roller 331 and a plurality of second rotating blades 332 arranged along the length direction of the second rotating roller 331, the second motor 310 can be connected with the second rotating roller 331 through the second speed reducer 320 to drive the second rotating roller 331 to rotate, and the second rotating blades 332 are also arranged in a staggered manner with the fixed knives 120, and the second rotating blades 332 can also be cooperated with the fixed knives 120 to shear and tear to realize the crushing of solid waste.
[0038] The control module 410 can include a CPU or an MCU and its attached circuit, such as Figure 1 、 2 As shown in FIG. 8, the first frequency conversion module 422 and the second frequency conversion module 423 can each adopt an integrated frequency conversion chip, or can be combined by a plurality of units. Specifically, taking the first frequency conversion module 422 as an example, the first frequency conversion module 422 is internally provided with a rectification and voltage stabilization unit, a driving unit, and a recovery unit. The rectification and voltage stabilization unit can be composed of a full-wave rectification bridge, a filter capacitor, a transformer and the like. An external power supply main bus can transmit an alternating current power supply. The input end of the rectification and voltage stabilization unit is connected with the power supply main bus, and the alternating current power supply is rectified and voltage-stabilized to become a direct current power supply, which then supplies power to a direct current bus 421. The driving unit can include a plurality of semiconductor switching tubes. The plurality of switching tubes form an H-shaped driving circuit, and the direct current input end of the driving circuit is connected with the direct current bus 421. The output end of the driving circuit is connected with the first motor 210 or the second motor 310. The control module 410 is connected with the driving unit to control the on-off state of the switching tubes in the driving unit, so as to apply a forward current to the first motor 210 or the second motor 310 to drive the first motor 210 or the second motor 310 to rotate forward, or to apply a reverse current to the first motor 210 or the second motor 310 to drive the first motor 210 or the second motor 310 to rotate reversely. The control module 410 can also control all the switching tubes in the driving unit to be turned off to stop the direct current bus 421 from supplying power to the first motor 210 or the second motor 310.
[0039] The recycling unit can include a semiconductor switch tube or a diode, an input end of the recycling unit is connected with the first motor 210 or the second motor 310, an output end of the recycling unit is connected with the DC bus 421, the control module 410 is connected with the recycling unit to control the on-off of the recycling branch, the electric energy generated by the first motor 210 or the second motor 310 can be output to the DC bus 421 through the recycling unit, and the electric energy of the DC bus 421 cannot be transmitted to the first motor 210 or the second motor 310 through the recycling unit.
[0040] The double-shaft crusher, the rack 100 is provided with at least a first crushing module 200 and a second crushing module 300, the first crushing module 200 and the second crushing module 300 can run to realize the crushing treatment of waste, the first motor 210 drives the first roller cutter assembly 230 to rotate, the second motor 310 drives the second roller cutter assembly 330 to rotate, after the first motor 210 rotates for a certain time, the first motor 210 can decelerate and brake, and then rotate in the opposite direction after stopping, and during the deceleration and braking process of the first motor 210, the DC bus 421 stops supplying power to the first motor 210, the first motor 210 rotates due to inertia and generates electricity, the generated electric energy can be output to the DC bus 421 through the first frequency conversion module 422, and during the period, the second motor 310 keeps running, and the electric energy can be provided to the second motor 310 through the DC bus 421, and in the same way, after the second motor 310 rotates for a certain time, the second motor 310 can decelerate and brake, and then rotate in the opposite direction after stopping, and during the deceleration and braking process of the second motor 310, the DC bus 421 stops supplying power to the second motor 310, the second motor 310 rotates due to inertia and generates electricity, the generated electric energy can be output to the DC bus 421 through the second frequency conversion module 423, and during the period, the first motor 210 keeps running, and the electric energy can be provided to the first motor 210 through the DC bus 421, so it can be seen that the design improves the crushing efficiency and optimizes the crushing effect of waste, and improves the energy utilization efficiency and reduces the energy consumption cost.
[0041] In some embodiments of the application, the driving module 420 further comprises a braking resistance module 430, the first frequency conversion module 422 and the second frequency conversion module 423 are connected with the braking resistance module 430, and the DC bus 421 can discharge through the braking resistance module 430 to consume energy.
[0042] The input end of the braking resistance module 430 is connected with the DC bus 421, the input end of the braking resistance module 430 is grounded, and the braking resistance module 430 is internally provided with a braking switch, when the DC bus 421 accumulates too much energy, the braking switch is turned on, and the DC bus 421 discharges through the braking resistance module 430 to consume energy.
[0043] Specifically, the braking resistance module 430 can include two braking resistors, such asFigure 8 As shown, two braking resistors are correspondingly arranged in the first variable frequency module 422 and the second variable frequency module 423, and the first variable frequency module 422 and the second variable frequency module 423 can control the on-off to make the direct current bus 421 discharge through the braking resistors.
[0044] According to the energy recovery control method of the second aspect of the embodiment of the present application, the energy recovery control method comprises: Figures 3 to 7 As shown, the control module 410 controls the first variable frequency module 422 and the second variable frequency module 423 to operate to realize the energy recovery control method, and the energy recovery control method comprises:
[0045] S510, the direct current bus 421 supplies power to the first motor 210 to drive the first motor 210 to rotate, and the direct current bus 421 supplies power to the second motor 310 to drive the second motor 310 to rotate, and the first continuous running time of the first motor 210 and the second continuous running time of the second motor 310 are recorded respectively;
[0046] S520, when the first continuous running time exceeds the first time threshold, the first variable frequency module 422 is controlled to act to stop the direct current bus 421 from supplying power to the first motor 210, and the first motor 210 generates electricity at a reduced speed to supply power to the direct current bus 421 until the rotation speed of the first motor 210 is zero, the first variable frequency module 422 is controlled to act to restore the direct current bus 421 to supply power to the first motor 210, and the first motor 210 is driven to change the rotation direction to rotate again and record the first continuous running time of the first motor 210 again;
[0047] S530, when the second continuous running time exceeds the second time threshold, the second variable frequency module 423 is controlled to act to stop the direct current bus 421 from supplying power to the second motor 310, and the second motor 310 generates electricity at a reduced speed to supply power to the direct current bus 421 until the rotation speed of the second motor 310 is zero, the second variable frequency module 423 is controlled to act to restore the direct current bus 421 to supply power to the second motor 310, and the second motor 310 is driven to change the rotation direction to rotate again and record the second continuous running time of the second motor 310 again;
[0048] When the first continuous running time reaches the first time threshold, the second motor 310 is generating electricity at a reduced speed, the step of controlling the first variable frequency module 422 to act to stop the direct current bus 421 from supplying power to the first motor 210 is not triggered until the direct current bus 421 supplies power to the second motor 310 is restored, and when the second continuous running time reaches the second time threshold, the first motor 210 is generating electricity at a reduced speed, the step of controlling the second variable frequency module 423 to act to stop the direct current bus 421 from supplying power to the second motor 310 is not triggered until the direct current bus 421 supplies power to the first motor 210 is restored.
[0049] It can be understood that, as Figure 4 shown, in the first working state of normal operation, the first motor 210 and the second motor 310 are powered by the DC bus 421, the first motor 210 and the second motor 310 can be started at the same time, or the first motor 210 can be started first and the second motor 310 can be started later, and when the first motor 210 or the second motor 310 is decelerated to zero each time and then reversed to restart rotation, the first continuous running time or the second continuous running time needs to be reset to zero and restarted.
[0050] It should be noted that the first time threshold and the second time threshold can be set by the staff or the manufacturer according to the actual needs, and the first time threshold and the second time threshold can be equal or not equal, for example, the first time threshold and the second time threshold can be set to 10s, 20s, etc.
[0051] As Figure 5 shown, when the first continuous running time exceeds the first time threshold, the first motor 210 needs to be reversed at this time, and the double-shaft crusher is switched from the first working state to the second working state, the control module 410 controls the first frequency conversion module 422 to act to stop the DC bus 421 from powering the first motor 210, the first motor 210 loses power and is subjected to the resistance of the waste product to the first roller knife assembly 230 to form deceleration, in this process, the first motor 210 still rotates due to inertia and thus generates electricity, the control module 410 controls the first frequency conversion module 422 to deliver the electrical energy generated by the first motor 210 to the DC bus 421, while the DC bus 421 normally powers the second motor 310, after the first motor 210 is decelerated to zero, the control module 410 can control the first frequency conversion module 422 to act to restore the DC bus 421 to power the first motor 210, and the control module 410 controls the drive unit to change the current output direction, so that the rotation direction of the first motor 210 is opposite to the rotation direction of the previous rotation, at this time, it is restored from the second working state to the first working state.
[0052] Similarly, as Figure 6As shown, when the second continuous running time exceeds the second time threshold, at which time the second motor 310 needs to be controlled to reverse, the double-shaft crusher is switched from the first working state to the third working state, the control module 410 controls the second variable frequency module 423 to act to stop the direct current bus 421 from supplying power to the second motor 310, the second motor 310 loses power and is subjected to the resistance of the waste to the second roller cutter assembly 330 to form deceleration, in this process, the second motor 310 still rotates due to inertia to generate electricity, the control module 410 controls the second variable frequency module 423 to deliver the electrical energy generated by the second motor 310 to the direct current bus 421, while the direct current bus 421 normally supplies power to the first motor 210, after the second motor 310 decelerates to zero, the control module 410 can control the second variable frequency module 423 to act to restore the direct current bus 421 to supply power to the second motor 310, and the control module 410 controls the drive unit to change the current output direction, so that the rotation direction of the second motor 310 is opposite to the rotation direction of the previous rotation, at this time, it is restored from the third working state to the first working state.
[0053] In order to prevent the simultaneous triggering of the first motor 210 and the second motor 310 to decelerate when the first continuous running time reaches the first time threshold and the second continuous running time reaches the second time threshold, resulting in waste of electrical energy, therefore, when the first continuous running time reaches the first time threshold and the second motor 310 is generating electricity by decelerating, the step of controlling the first variable frequency module 422 to act to stop the direct current bus 421 from supplying power to the first motor 210 is not triggered, until the direct current bus 421 is restored to supply power to the second motor 310, at this time, the first continuous running time still exceeds the first time threshold, the step of controlling the first variable frequency module 422 to act to stop the direct current bus 421 from supplying power to the first motor 210 can be triggered, similarly, when the second continuous running time reaches the second time threshold and the first motor 210 is generating electricity by decelerating, the step of controlling the second variable frequency module 423 to act to stop the direct current bus 421 from supplying power to the second motor 310 is not triggered, until the direct current bus 421 is restored to supply power to the first motor 210, at this time, the second continuous running time still exceeds the second time threshold, the step of controlling the second variable frequency module 423 to act to stop the direct current bus 421 from supplying power to the second motor 310 can be triggered.
[0054] The energy recovery control method can make the first motor 210 generate electricity due to inertia during deceleration braking of the first motor 210, the generated electricity can be output to the DC bus 421 through the first frequency conversion module 422, and the second motor 310 keeps running during this period, and the same applies to the second motor 310, the DC bus 421 stops supplying power to the second motor 310 during deceleration braking of the second motor 310, the second motor 310 generates electricity due to inertia, the generated electricity can be output to the DC bus 421 through the second frequency conversion module 423, and the first motor 210 keeps running during this period, which improves the crushing efficiency and optimizes the crushing effect of waste, and improves the energy utilization efficiency and reduces the energy consumption cost.
[0055] In some embodiments of the application, the energy recovery control method further comprises:
[0056] The first working current of the first motor 210 is obtained, and when the first working current is greater than the first current threshold, the first frequency conversion module 422 is controlled to act to stop the DC bus 421 from supplying power to the first motor 210, and the first motor 210 generates electricity during deceleration to supply power to the DC bus 421 until the first motor 210 stops rotating, the first frequency conversion module 422 is controlled to act to restore the DC bus 421 to supply power to the first motor 210, and the first motor 210 is driven to change the rotation direction to rotate again and record the first continuous running time of the first motor 210.
[0057] When the first roller knife assembly 230 cannot cut the waste at one time, the first roller knife assembly 230 is locked, the first working current of the first motor 210 increases, in order to prevent the first motor 210 from being burned out due to the increase of the first working current, and also in order to prevent the first roller knife assembly 230 from being damaged and improve the crushing effect, when the first working current is greater than the first current threshold, even if the first continuous running time does not reach the first time threshold, the first frequency conversion module 422 can be controlled to act to stop the DC bus 421 from supplying power to the first motor 210, and after the first motor 210 stops rotating, the first motor 210 is controlled to reverse.
[0058] In some embodiments of the application, the energy recovery control method further comprises:
[0059] The second working current of the second motor 310 is obtained, and when the second working current is greater than the second current threshold, the second frequency conversion module 423 is controlled to act to stop the DC bus 421 from supplying power to the second motor 310, and the second motor 310 generates electricity during deceleration to supply power to the DC bus 421 until the second motor 310 stops rotating, the second frequency conversion module 423 is controlled to act to restore the DC bus 421 to supply power to the second motor 310, and the second motor 310 is driven to change the rotation direction to rotate again and record the second continuous running time of the second motor 310.
[0060] Similarly, when the second operating current is greater than the second current threshold, even if the second continuous running time does not reach the second time threshold, the second variable frequency module 423 can be controlled to act to stop the direct current bus 421 from supplying power to the second motor 310, and after the second motor 310 is at zero speed, the second motor 310 is controlled to reverse.
[0061] In some embodiments of the application, the drive module 420 further comprises a braking resistor module 430, and the first variable frequency module 422 and the second variable frequency module 423 are both connected to the braking resistor module 430.
[0062] As shown in Figure 7 the energy recovery control method further comprises:
[0063] When the first operating current is greater than the first current threshold and the second operating current is greater than the second current threshold, the first variable frequency module 422 is controlled to act to stop the direct current bus 421 from supplying power to the first motor 210, the first motor 210 is controlled to slow down and generate electricity to supply power to the direct current bus 421, and the second variable frequency module 423 is controlled to act to stop the direct current bus 421 from supplying power to the second motor 310, the second motor 310 is controlled to slow down and generate electricity to supply power to the direct current bus 421.
[0064] The direct current bus 421 is discharged through the braking resistor module 430 to dissipate energy.
[0065] When the first motor 210 and the second motor 310 are simultaneously stalled, at this time, without following the condition that the first motor 210 and the second motor 310 cannot simultaneously slow down, the control module 410 can control the direct current bus 421 to stop supplying power to the first motor 210 and simultaneously stop supplying power to the second motor 310, and in order to prevent the energy stored in the direct current bus 421 from being too large, the dual-shaft crusher is switched to the fourth working state, as shown in Figure 7 the first motor 210 and the second motor 310 are both slowed down and output the generated electrical energy to the direct current bus 421, and the control module 410 controls the braking resistor module 430 to be turned on, and the direct current bus 421 is discharged through the braking resistor module 430.
[0066] In some embodiments of the application, the energy recovery control method further comprises:
[0067] The resistance temperature of the braking resistor module 430 is obtained, and when the resistance temperature reaches a temperature threshold, the direct current bus 421 is stopped from supplying power to the first motor 210 and the second motor 310.
[0068] Since the DC bus 421 discharges energy through the braking resistor, the braking resistor will generate heat and its temperature will rise. If the temperature is too high, the braking resistor may be damaged. A temperature sensor or a thermocouple or other temperature measuring device may be provided on the braking resistor module 430 to detect the resistance temperature of the braking resistor module 430. If the resistance temperature reaches a temperature threshold, the dual-shaft crusher will be shut down, that is, the DC bus 421 will not be restored to supply power to the first motor 210 and the second motor 310, and an alarm signal will be output to the staff to allow them to reorganize the waste in the crushing chamber 110, or the DC bus 421 will be restored to supply power to the first motor 210 and the second motor 310 until the resistance temperature is lower than the temperature threshold.
[0069] In some embodiments of the present invention, the energy recovery control method further includes:
[0070] The bus voltage of the DC bus 421 is obtained. When the bus voltage is greater than the bus voltage threshold, the DC bus 421 is discharged through the braking resistor module 430 to consume energy.
[0071] Even if only either the first motor 210 or the second motor 310 slows down and outputs electric energy to the DC bus 421, since the main power supply bus is also outputting electric energy to the DC bus 421, the control module 410 needs to control the rectifier and voltage regulation unit in the first frequency conversion module 422 or the second frequency conversion module 423 to balance the bus voltage on the DC bus 421. When the output electric energy of the main power supply bus and the electric energy generated by the motor are combined and fluctuations occur, causing the bus voltage to be too high, the control module 410 also needs to control the braking resistor module 430 to discharge the electric energy accumulated on the DC bus 421 in a timely manner to ensure that the DC bus 421 supplies stable and reliable energy.
[0072] According to the control device of the third embodiment of the present invention, the control device includes a memory 620 and a processor 610. The memory 620 stores a computer program, and the processor 610 implements the energy recovery control method disclosed in any of the above embodiments when executing the computer program.
[0073] like Figure 9 As shown, Figure 9 The hardware structure of the control device of another embodiment is also illustrated. The control device includes:
[0074] The processor 610 may be implemented as a general-purpose central processing unit (CPU), a microprocessor (MCU), an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is configured to execute relevant programs to implement the technical solutions provided in the embodiments of the present application.
[0075] The memory 620 can be implemented in the form of read only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM), etc. The memory 620 can store an operating system and other application programs. When the technical solutions provided by the embodiments of the present specification are implemented by software or firmware, the related program codes are stored in the memory 620 and are invoked and executed by the processor 610 to implement the energy recovery control method of the embodiments of the present application.
[0076] The input / output interface 630 is configured to realize information input and output.
[0077] The communication interface 640 is configured to realize the communication interaction between the device and other devices. The communication can be realized by wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).
[0078] The bus 650 is configured to transmit information between various components (such as the processor 610, the memory 620, the input / output interface 630, and the communication interface 640) of the device.
[0079] 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 within the device.
[0080] 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, and the computer program is executed by the processor 610 to realize the energy recovery control method disclosed in any of the above embodiments.
[0081] The memory 620 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 620 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.
[0082] 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.
[0083] 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.
[0084] The device embodiments described above are only schematic, and the units illustrated as separate components can or can not be physically separate, 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 according to actual needs to achieve the purpose of the embodiments of the present application.
[0085] Those skilled in the art can understand that all or some of the steps in the above disclosed method, the functions of the modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.
[0086] 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 be used 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 that 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 that includes 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.
[0087] 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 essence of the embodiments of the present application shall be within the scope of the rights of the embodiments of the present application.
Claims
1. A double-shaft crusher, characterized in that: include: A frame having a crushing chamber; a first crushing module, comprising a first motor and a first roller cutter assembly, wherein the first motor is disposed on the frame, the first roller cutter assembly is rotatably disposed on the frame and is located in the crushing chamber, and the first motor is connected to the first roller cutter assembly to drive the first roller cutter assembly to rotate; a second crushing module, comprising a second motor and a second roller cutter assembly, wherein the second motor is disposed on the frame, the second roller cutter assembly is rotatably disposed on the frame and is located in the crushing chamber, and the second motor is connected to the second roller cutter assembly to drive the second roller cutter assembly to rotate; A drive module, comprising a DC bus, a first frequency conversion module, and a second frequency conversion module, wherein the first frequency conversion module is connected to the DC bus and the first motor respectively, and the second frequency conversion module is connected to the DC bus and the second motor respectively; The control module is connected to the first frequency conversion module and the second frequency conversion module respectively. The DC bus can supply power to the first motor through the first frequency conversion module to drive the first motor to start running. The first motor can decelerate and generate power to supply power to the DC bus through the first frequency conversion module. The DC bus can supply power to the second motor through the second frequency conversion module to drive the second motor to start running. The second motor can decelerate and generate power to supply power to the DC bus through the second frequency conversion module.
2. A double-shaft crusher according to claim 1, characterized in that: The driving module further includes a braking resistor module. The first frequency conversion module and the second frequency conversion module are both connected to the braking resistor module. The DC bus can discharge through the braking resistor module to consume energy.
3. An energy recovery control method, applied to the double-shaft crusher according to claim 1, characterized in that: The control module controls the operation of the first frequency conversion module and the second frequency conversion module respectively to implement an energy recovery control method, which includes: The DC bus supplies power to the first motor to drive the first motor to rotate, and the DC bus supplies power to the second motor to drive the second motor to rotate, and respectively records a first continuous operation time of the first motor and a second continuous operation time of the second motor; When the first continuous operation time exceeds a first time threshold, the first frequency conversion module is controlled to stop the DC bus from supplying power to the first motor, and the first motor is decelerated to generate power to supply power to the DC bus until the speed of the first motor is zero, and the first frequency conversion module is controlled to resume supplying power to the first motor from the DC bus, and the first motor is driven to change its rotation direction and start rotating again, and the first continuous operation time of the first motor is re-recorded; When the second continuous operation time exceeds a second time threshold, the second frequency conversion module is controlled to stop the DC bus from supplying power to the second motor, and the second motor is decelerated to generate power to supply power to the DC bus until the speed of the second motor reaches zero, and the second frequency conversion module is controlled to resume supplying power to the second motor from the DC bus, and the second motor is driven to change its rotation direction and start rotating again, and the second continuous operation time of the second motor is re-recorded; Among them, when the first continuous operation time reaches the first time threshold, the second motor is decelerating to generate electricity, and the step of controlling the first frequency conversion module to stop the DC bus from supplying power to the first motor is not triggered until the DC bus is restored to supply power to the second motor; when the second continuous operation time reaches the second time threshold, the first motor is decelerating to generate electricity, and the step of controlling the second frequency conversion module to stop the DC bus from supplying power to the second motor is not triggered until the DC bus is restored to supply power to the first motor.
4. The energy recovery control method according to claim 3, characterized in that: Also includes: A first operating current of the first motor is obtained. When the first operating current is greater than a first current threshold, the first frequency conversion module is controlled to stop the DC bus from supplying power to the first motor, and the first motor decelerates to generate power to supply power to the DC bus until the speed of the first motor is zero. The first frequency conversion module is controlled to resume power supply to the first motor from the DC bus, and the first motor is driven to change its rotation direction and rotate again, and the first continuous operation time of the first motor is re-recorded.
5. The energy recovery control method according to claim 4, characterized in that: Also includes: A second operating current of the second motor is obtained. When the second operating current is greater than a second current threshold, the second frequency conversion module is controlled to stop the DC bus from supplying power to the second motor, and the second motor decelerates to generate power to supply power to the DC bus until the speed of the second motor is zero. The second frequency conversion module is controlled to resume power supply from the DC bus to the second motor, and the second motor is driven to change its rotation direction and rotate again, and the second continuous operation time of the second motor is re-recorded.
6. The energy recovery control method according to claim 5, wherein the driving module further comprises a braking resistor module, and the first frequency conversion module and the second frequency conversion module are both connected to the braking resistor module, characterized in that: The energy recovery control method further includes: When the first operating current is greater than a first current threshold and the second operating current is greater than a second current threshold, the first frequency conversion module is controlled to stop the DC bus from supplying power to the first motor, and the first motor decelerates to generate power to supply the DC bus, and the second frequency conversion module is controlled to stop the DC bus from supplying power to the second motor, and the second motor decelerates to generate power to supply the DC bus; The DC bus is discharged through the braking resistor module to consume energy.
7. The energy recovery control method according to claim 6, characterized in that: The energy recovery control method further includes: The resistance temperature of the braking resistor module is obtained, and when the resistance temperature reaches a temperature threshold, the DC bus stops supplying power to the first motor and the second motor.
8. The energy recovery control method according to any one of claims 3 to 5, wherein the driving module further comprises a braking resistor module, and the first frequency conversion module and the second frequency conversion module are both connected to the braking resistor module, characterized in that: The energy recovery control method further includes: The bus voltage of the DC bus is obtained. When the bus voltage is greater than the bus voltage threshold, the DC bus is discharged through the braking resistor module to consume energy.
9. A control device, characterized in that: The control device includes a memory and a processor, the memory stores a computer program, and the processor implements the energy recovery control method according to any one of claims 3 to 8 when executing the computer program.
10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, an energy recovery control method according to any one of claims 3 to 8 is implemented.