Carding machine movable flat drive device and control method

Abstract

The application provides a carding machine movable flat driving device and control method, comprising a movable flat, a movable flat motor, a movable flat transmission mechanism and an electrical control system, characterized in that: the movable flat motor is two variable frequency motors, the movable flat transmission mechanism has two sets, the electrical control system comprises a PLC controller and a man-machine interface, the PLC controller comprises two speed sensors, a motor speed calculation module and a variable frequency control module, the man-machine interface is electrically connected with the motor speed calculation module and the variable frequency control module, and the variable frequency control module controls the two variable frequency motors to drive the corresponding movable flat transmission mechanism to drive the movable flat to rotate synchronously. The driving mechanism of the movable flat of the carding machine is improved, the disadvantages of the single motor driving mode are overcome, the stability of the operation of the movable flat of the carding machine is further improved, and the fiber carding effect is optimized. The control method is reasonable, has the double motor speed detection and dynamic compensation functions, and can enhance the adaptability of the load.

Description

Technical Field

[0001] This invention belongs to the field of textile machinery manufacturing technology, and relates to the improvement of the driving mechanism of the movable cover plate of a carding machine, specifically a driving device and control method for the movable cover plate of a carding machine. Background Technology

[0002] In carding machines, the movable cover plate and the cylinder surface work together to perform the crucial task of finely carding the fibers. The carding cloth on the movable cover plate can grasp the fibers on the cylinder surface, sorting and organizing them, further breaking down the fiber bundles into individual fibers, thus improving the quality of fiber carding. However, the stability of the movable cover plate's operation plays a vital role in its carding effect. Currently, the movable cover plate drive method in existing carding machines both domestically and internationally is generally a single motor drive. In some models, the movable cover plate motor also drives the movable cover plate brush roller, such as... Figure 5 , Figure 6 As shown.

[0003] With the development of the textile industry, the number of movable cover plates on carding machines is constantly increasing, and the performance requirements for the motors of these movable cover plates are also rising. The disadvantages of single-motor transmission are gradually becoming apparent, such as difficulty in meeting the needs of higher precision carding and poor operational stability, which restricts the improvement of the overall performance of carding machines. For example, existing carding machines suffer from problems such as jamming, vibration, and deviation during the transmission process of the movable cover plates; in addition, existing carding machines also suffer from problems such as easy wear and tear on motors and transmission components, resulting in a short service life.

[0004] Designing a drive device and control method for the movable cover plate of a carding machine, simplifying the mechanical transmission structure, reducing energy consumption, overcoming the drawbacks of single-motor transmission, and further improving the stability of the movable cover plate's operation to optimize fiber carding effect are urgent technical problems to be solved in this field. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a driving device and control method for a movable cover plate of a carding machine. By improving the driving mechanism of the movable cover plate, the mechanical transmission structure is simplified, energy consumption is reduced, the drawbacks of single-motor transmission are overcome, and the stability of the movable cover plate operation is further improved, optimizing the fiber carding effect. The control method is reasonable, with dual-motor speed detection and dynamic compensation functions, which can enhance the adaptability to load.

[0006] The objective of this invention is achieved through the following technical solution: A carding machine movable cover plate driving device includes a movable cover plate, a movable cover plate motor, a movable cover plate transmission mechanism, and an electrical control system. The movable cover plate motor comprises movable cover plate motor I and movable cover plate motor II, both of which are variable frequency motors. The movable cover plate transmission mechanism comprises movable cover plate transmission mechanism I and movable cover plate transmission mechanism II. The electrical control system includes a PLC controller and a human-machine interface. The PLC controller includes a speed sensor I, a speed sensor II, a motor speed calculation module, and a variable frequency control module. The human-machine interface is electrically connected to the motor speed calculation module, and the motor speed calculation module is electrically connected to the variable frequency control module. The variable frequency control module is connected to the control terminals of movable cover plate motor I and movable cover plate motor II, respectively, and controls movable cover plate motor I and movable cover plate motor II to drive movable cover plate transmission mechanism I and movable cover plate transmission mechanism II synchronously to rotate the movable cover plate.

[0007] Improvements to the above technical solution: The movable cover plate transmission mechanism I includes a movable cover plate transmission shaft I, two movable cover plate transmission pulleys I, and a movable cover plate synchronous belt. The rotating shaft of the movable cover plate motor I is connected to one end of the movable cover plate transmission shaft I, and one movable cover plate transmission pulley I is installed at each end of the movable cover plate transmission shaft I. The movable cover plate transmission mechanism II includes a movable cover plate transmission shaft II, two movable cover plate transmission pulleys II, and a movable cover plate synchronous belt. The rotating shaft of the movable cover plate motor II is connected to one end of the movable cover plate transmission shaft II, and one movable cover plate transmission pulley II is installed at each end of the movable cover plate transmission shaft II. The two movable cover plate synchronous belts are respectively connected to the movable cover plate transmission pulleys I and II on the same side. The movable cover plate transmission shaft I and the movable cover plate transmission shaft II are arranged parallel to each other at the front and rear ends of the movable cover plate, and the movable cover plate is driven to rotate by the two movable cover plate transmission pulleys I and the two movable cover plate transmission pulleys II.

[0008] Further improvements to the above technical solution include a left circular wall panel and a right circular wall panel, wherein the movable cover plate motor I and the movable cover plate motor II are mounted on the same side of the left circular wall panel or the right circular wall panel.

[0009] A further improvement to the above technical solution includes a brush roller, wherein the drive shaft of the brush roller is directly connected to the rotating shaft of a brush roller motor.

[0010] Further improvement to the above technical solution: The brush roller motor is a variable frequency geared motor or a servo motor, and the control terminal of the variable frequency geared motor or servo motor is connected to the PLC controller.

[0011] A further improvement to the above technical solution is that it also includes a cleaning roller, the drive shaft of which is connected to the shaft of a cleaning roller motor via a cleaning roller drive pulley.

[0012] A further improvement to the above technical solution: the cleaning roller motor is an asynchronous motor, and the control terminal of the asynchronous motor is connected to the PLC controller.

[0013] A control method for the aforementioned combing machine movable cover plate driving device, characterized in that the control method includes the following steps: Step 1: Set the speed difference rate η threshold between the movable cover plate motor I and the movable cover plate motor II to the motor speed calculation module through the human-computer interaction interface. The speed difference rate η is the percentage of the speed difference between the movable cover plate motor I and the movable cover plate motor II to the normal speed of the motor. Step 2: Start the carding machine's movable cover drive device. The PLC controller controls the movable cover motor I and movable cover motor II to drive the movable cover transmission mechanism I and movable cover transmission mechanism II respectively, so as to drive the movable cover to rotate normally. Step 3: Speed ​​sensor I and speed sensor II measure the rotational speeds of movable cover plate motor I and movable cover plate motor II respectively, and send the measurement data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between movable cover plate motor I and movable cover plate motor II, and compares it with the set speed difference η threshold in real time. If the speed difference η between movable cover plate motor I and movable cover plate motor II is less than the set speed difference η threshold, the movable cover plate operates normally. Step 4: If the speed difference η is greater than the set speed difference η threshold and continues for a period of time, a warning signal will be issued through the human-machine interface. At the same time, the PLC controller will control the rotation speed of the movable cover to be reduced. If the speed difference η is still greater than the set speed difference η threshold and continues for a period of time, a fault signal for the movable cover will be issued through the human-machine interface, and the PLC controller will automatically control the equipment to stop. Step 5: Reset manually on the human-computer interaction interface, or power on again.

[0014] Improvements to the above technical solution: In step 1, the set threshold for the speed difference rate η is 1%; in step 3, speed sensor I and speed sensor II collect and measure the speeds of the movable cover plate motor I and the movable cover plate motor II with a sampling period of 5ms; in step 4, if the speed difference rate η is greater than 1% and the duration reaches at least 500ms, a warning signal is issued through the human-machine interface, and at the same time, the PLC controller controls the rotation speed of the movable cover plate to be reduced by 20%; if the speed difference rate η is still greater than 1% and continues for at least 500ms, a fault signal for the movable cover plate is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: 1. The dual motors of this invention provide greater power output, which can easily cope with the problem of an increased number of movable cover plates, making the movable cover plates run more smoothly; 2. The present invention uses dual motors to drive the movable cover plate to different positions, which can make the movable cover plate more evenly stressed during movement, reduce tilting and jamming during operation, and ensure the smooth operation of the movable cover plate. 3. This invention uses dual motors to precisely control the movement of the movable cover plate, which can better comb the fibers, remove impurities and short fibers, improve the quality of the cotton sliver, and lay a good foundation for subsequent spinning processes. 4. The present invention enhances the stability and reliability of the equipment, improves operating efficiency, extends equipment life, and reduces maintenance costs; 5. This invention features dual-motor speed detection, enhancing load adaptability. Errors can be monitored and dynamically compensated through the electrical system. This reduces synchronization errors caused by wear and deformation of the drive shaft, belts, and gears, ensuring the long-term synchronization and stability of the movable cover plate. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a movable cover plate driving device for a carding machine according to the present invention; Figure 2 This is a schematic diagram of the structure of a movable cover plate driving device for a carding machine according to the present invention; Figure 3 This is a schematic diagram of the electrical control system of a carding machine movable cover plate drive device according to the present invention; Figure 4 This is a control flowchart of a carding machine movable cover plate driving device according to the present invention; Figure 5 This is a schematic diagram of the structure of a single motor-driven movable cover plate in an existing carding machine; Figure 6 This is a schematic diagram of the structure of an existing carding machine where the movable cover plate motor also serves as the brush roller drive.

[0017] In the diagram: 1. Movable cover plate; 2. Movable cover plate drive shaft I; 3. Movable cover plate drive shaft II; 4. Movable cover plate drive pulley I; 5. Movable cover plate drive pulley II; 6. Movable cover plate motor I; 7. Movable cover plate motor II; 8. Movable cover plate synchronous belt; 9. Cylinder; 10. Brush roller; 11. Cleaning roller; 12. Brush roller motor; 13. Cleaning roller motor. Detailed Implementation

[0018] See Figures 1-3 An embodiment of the movable cover plate driving device for a carding machine according to the present invention includes a movable cover plate 1, a movable cover plate motor, a movable cover plate transmission mechanism, and an electrical control system. The movable cover plate motor includes movable cover plate motor I 6 and movable cover plate motor II 7, both of which are variable frequency motors. The movable cover plate transmission mechanism includes movable cover plate transmission mechanism I and movable cover plate transmission mechanism II. The electrical control system includes a PLC controller and a human-machine interface. The PLC controller includes speed sensor I, speed sensor II, a motor speed calculation module, and a variable frequency control module. The human-machine interface is electrically connected to the motor speed calculation module, and the motor speed calculation module is electrically connected to the variable frequency control module. The variable frequency control module is connected to the control terminals of movable cover plate motor I 6 and movable cover plate motor II 7 respectively, and controls movable cover plate motor I 6 and movable cover plate motor II 7 to drive movable cover plate transmission mechanism I and movable cover plate transmission mechanism II to synchronously drive movable cover plate 1 to rotate.

[0019] Specifically: The aforementioned movable cover plate transmission mechanism I includes a movable cover plate transmission shaft I2, two movable cover plate transmission pulleys I4, and a movable cover plate synchronous belt 8. The rotating shaft of the movable cover plate motor I6 is connected to one end of the movable cover plate transmission shaft I2, and a movable cover plate transmission pulley I4 is installed on each end of the movable cover plate transmission shaft I2. The aforementioned movable cover plate transmission mechanism II includes a movable cover plate transmission shaft II3, two movable cover plate transmission pulleys II5, and a movable cover plate synchronous belt 8. The rotating shaft of the movable cover plate motor II7 is connected to one end of the movable cover plate transmission shaft II3, and a movable cover plate transmission pulley II5 is installed on each end of the movable cover plate transmission shaft II3. Two movable cover plate synchronous belts 8 are respectively connected to movable cover plate drive pulley I 4 and movable cover plate drive pulley II 5 on the same side. Movable cover plate drive shaft I 2 and movable cover plate drive shaft II 3 are arranged parallel to each other at the front and rear ends of the movable cover plate 1. The movable cover plate 1 is driven to rotate by the two movable cover plate drive pulleys I 4 and two movable cover plate drive pulleys II 5. Figure 1 In the middle, below the movable cover plate 1 is the cylinder 9.

[0020] Furthermore, it also includes a left circular wall panel and a right circular wall panel, wherein the movable cover plate motor I 6 and the movable cover plate motor II 7 are disposed on the left circular wall panel or the right circular wall panel on the same side.

[0021] Furthermore, it also includes a brush roller 10, the drive shaft of which is directly connected to the rotating shaft of a brush roller motor 12. The brush roller motor 12 is a variable frequency geared motor or a servo motor, and the control terminal of the variable frequency geared motor or servo motor is connected to the electrical control system. The speed can be set individually according to different raw materials or process requirements, thereby improving the automation level of the carding machine and improving the quality of the sliver.

[0022] Furthermore, the drive shaft of the cleaning roller 11 is connected to the shaft of a cleaning roller motor 13 via a cleaning roller drive pulley. The cleaning roller motor 13 is an asynchronous motor, and the control terminal of the asynchronous motor is connected to the electrical control system.

[0023] In this invention, the movable cover 1 is driven by two movable cover motors (movable cover motor I 6 and movable cover motor II 7). Movable cover drive shaft I 2 and movable cover drive shaft II 3 are not distinguished by master and slave shafts, and are driven by various motors respectively. Compared with the traditional single-motor drive, the dual-motor drive mode can more accurately control the operation of the movable cover, reduce vibration, jamming, and deviation during operation, and ensure that the movable cover remains stable under high-speed, heavy-load, and long-term working conditions; it can better adapt to different specifications and quantities of movable covers, meeting diverse production needs; the dual-motor drive distributes the load, with each motor bearing relatively less pressure, thereby reducing wear on the motors and transmission components and extending the service life of the equipment.

[0024] See Figures 1-4 A control method for the aforementioned combing machine movable cover plate drive device, characterized in that the control method includes the following steps: Step 1: Set the speed difference rate η threshold between the movable cover plate motor I 6 and the movable cover plate motor II 7 to the motor speed calculation module through the human-computer interaction interface. The speed difference rate η is the percentage of the speed difference between the movable cover plate motor I 6 and the movable cover plate motor II 7 to the normal speed of the motor. Step 2: Start the carding machine's movable cover drive device. The PLC controller controls the movable cover motor I 6 and movable cover motor II 7 to drive the movable cover transmission mechanism I and movable cover transmission mechanism II respectively, so as to drive the movable cover 1 to rotate normally. Step 3: Speed ​​sensor I and speed sensor II measure the rotational speeds of movable cover plate motor I 6 and movable cover plate motor II 7 respectively, and send the measurement data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between movable cover plate motor I 6 and movable cover plate motor II 7, and compares it with the set speed difference η threshold in real time. If the speed difference η between movable cover plate motor I 6 and movable cover plate motor II 7 is less than the set speed difference η threshold, then the movable cover plate 1 operates normally. Step 4: If the speed difference η is greater than the set speed difference η threshold and continues for a period of time, a warning signal will be issued through the human-machine interface. At the same time, the PLC controller will control the rotation speed of the movable cover 1 to be reduced. If the speed difference η is still greater than the set speed difference η threshold and continues for a period of time, a fault signal for the movable cover will be issued through the human-machine interface, and the PLC controller will automatically control the equipment to stop. Step 5: Reset manually on the human-computer interaction interface, or power on again.

[0025] Further, in step 1 above, the set speed difference rate η threshold is 1%; in step 3 above, speed sensor I and speed sensor II collect and measure the speed of movable cover plate motor I and movable cover plate motor II with a sampling period of 5ms; in step 4, if the speed difference rate η is greater than the 1% speed difference rate η threshold and the duration reaches at least 500ms, a warning signal is issued through the human-machine interface, and at the same time, the PLC controller controls the rotation speed of the movable cover plate to be reduced by 20%; if the speed difference rate η is still greater than 1% and continues for at least 500ms, a movable cover plate fault signal is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop.

[0026] For example, the speed difference rate η is the percentage of the speed difference between movable cover plate motor I 6 and movable cover plate motor II 7 to the normal speed of the motors. If the normal speed of movable cover plate motor I 6 and movable cover plate motor II 7 is 100 rpm, and the actual speed of movable cover plate motor I 6 is 100 rpm while the actual speed of movable cover plate motor II 7 is 98 rpm, then the speed difference rate η = (100 - 98 / 100) × 100 = 2%. In this case, the speed difference rate η between movable cover plate motor I 6 and movable cover plate motor II 7 is greater than the set speed difference rate η threshold (1%). Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A control method for a carding machine movable cover plate drive device, the carding machine movable cover plate drive device comprising a movable cover plate, a movable cover plate motor, a movable cover plate transmission mechanism, and an electrical control system, characterized in that, The movable cover plate motors include movable cover plate motor I and movable cover plate motor II, both of which are variable frequency motors. The movable cover plate transmission mechanism includes movable cover plate transmission mechanism I and movable cover plate transmission mechanism II. The electrical control system includes a PLC controller and a human-machine interface. The PLC controller includes speed sensor I, speed sensor II, a motor speed calculation module, and a variable frequency control module. The human-machine interface is electrically connected to the motor speed calculation module, and the motor speed calculation module is electrically connected to the variable frequency control module. The variable frequency control module is connected to the control terminals of movable cover plate motor I and movable cover plate motor II respectively, and controls movable cover plate motor I and movable cover plate motor II to drive movable cover plate transmission mechanism I and movable cover plate transmission mechanism II to synchronously rotate the movable cover plate. The control method includes the following steps: Step 1: Set the speed difference rate η threshold between the movable cover plate motor I and the movable cover plate motor II to the motor speed calculation module through the human-computer interaction interface. The speed difference rate η is the percentage of the speed difference between the movable cover plate motor I and the movable cover plate motor II to the normal speed of the motor. Step 2: Start the carding machine's movable cover drive device. The PLC controller controls the movable cover motor I and movable cover motor II to drive the movable cover transmission mechanism I and movable cover transmission mechanism II respectively, so as to drive the movable cover to rotate normally. Step 3: Speed ​​sensor I and speed sensor II measure the rotational speeds of movable cover plate motor I and movable cover plate motor II respectively, and send the measurement data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between movable cover plate motor I and movable cover plate motor II, and compares it with the set speed difference η threshold in real time. If the speed difference η between the movable cover motor I and the movable cover motor II is less than the set speed difference η threshold, the movable cover will operate normally. Step 4: If the speed difference η is greater than the set speed difference η threshold and continues for a period of time, a warning signal will be issued through the human-machine interface. At the same time, the PLC controller will control the rotation speed of the movable cover to be reduced. If the speed difference η is still greater than the set speed difference η threshold and continues for a period of time, a fault signal for the movable cover will be issued through the human-machine interface, and the PLC controller will automatically control the equipment to stop. Step 5: Reset manually on the human-computer interaction interface, or power on again.

2. The control method for the carding machine movable cover plate driving device according to claim 1, characterized in that, In step 1, the set speed difference rate η threshold is 1%. In step 3, speed sensor I and speed sensor II collect and measure the speed of movable cover plate motor I and movable cover plate motor II with a sampling period of 5ms. In step 4, if the speed difference rate η is greater than 1% and the duration reaches at least 500ms, a warning signal is issued through the human-machine interface. At the same time, the PLC controller controls the rotation speed of the movable cover plate to be reduced by 20%. If the speed difference rate η is still greater than 1% and lasts for at least 500ms, a movable cover plate fault signal is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop.

3. The control method for the carding machine movable cover drive device according to claim 1 or 2, characterized in that, The movable cover plate transmission mechanism I includes a movable cover plate transmission shaft I, two movable cover plate transmission pulleys I, and a movable cover plate synchronous belt. The rotating shaft of the movable cover plate motor I is connected to one end of the movable cover plate transmission shaft I, and one movable cover plate transmission pulley I is installed at each end of the movable cover plate transmission shaft I. The movable cover plate transmission mechanism II includes a movable cover plate transmission shaft II, two movable cover plate transmission pulleys II, and a movable cover plate synchronous belt. The rotating shaft of the movable cover plate motor II is connected to one end of the movable cover plate transmission shaft II, and one movable cover plate transmission pulley II is installed at each end of the movable cover plate transmission shaft II. The two movable cover plate synchronous belts are respectively connected to the movable cover plate transmission pulleys I and II on the same side. The movable cover plate transmission shaft I and the movable cover plate transmission shaft II are arranged parallel to each other at the front and rear ends of the movable cover plate, and the movable cover plate is driven to rotate by the two movable cover plate transmission pulleys I and the two movable cover plate transmission pulleys II.

4. The control method for the carding machine movable cover plate drive device according to claim 1 or 2, characterized in that, It also includes a left circular wall panel and a right circular wall panel, wherein the movable cover plate motor I and the movable cover plate motor II are mounted on the left circular wall panel or the right circular wall panel on the same side.

5. The control method for the carding machine movable cover plate drive device according to claim 1 or 2, characterized in that, It also includes a brush roller, the drive shaft of which is directly connected to the shaft of a brush roller motor.

6. The control method for the carding machine movable cover plate driving device according to claim 5, characterized in that, The brush roller motor is a variable frequency geared motor or a servo motor, and the control terminal of the variable frequency geared motor or servo motor is connected to the PLC controller.

7. The control method for the carding machine movable cover plate drive device according to claim 1 or 2, characterized in that, It also includes a cleaning roller, the drive shaft of which is connected to the shaft of a cleaning roller motor via a cleaning roller drive pulley.

8. The control method for the carding machine movable cover plate driving device according to claim 5, characterized in that, It also includes a cleaning roller, the drive shaft of which is connected to the shaft of a cleaning roller motor via a cleaning roller drive pulley.

9. The control method for the carding machine movable cover plate driving device according to claim 8, characterized in that, The cleaning roller motor is an asynchronous motor, and the control terminal of the asynchronous motor is connected to the PLC controller.

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