Carding machine movable cover plate driving device and control method

Abstract

The invention provides a carding machine movable cover plate driving device and a control method, the carding machine movable cover plate driving device comprises a movable cover plate, movable cover plate motors, two sets of movable cover plate transmission mechanisms and an electrical control system, and the carding machine movable cover plate driving device is characterized in that the movable cover plate motors are two variable frequency motors, the number of the movable cover plate transmission mechanisms is two, and the electrical control system comprises a PLC and a human-computer interaction interface. The PLC comprises two speed measurement sensors, a motor rotating speed calculation module and a frequency conversion control module, the man-machine interaction interface is electrically connected with the frequency conversion control module through the motor rotating speed calculation module, and the frequency conversion control module controls the two variable frequency motors to drive the corresponding movable cover plate transmission mechanisms to synchronously drive the movable cover plate to rotate. By improving the driving mechanism of the movable cover plate of the carding machine, the defects of a single-motor transmission mode are overcome, the operation stability of the movable cover plate of the carding machine is further improved, and the fiber carding effect is optimized. The control method is reasonable, has dual-motor rotating speed detection and dynamic compensation functions, and can enhance the adaptability of the load.

Description

Technical Field

[0001] The invention belongs to the technical field of textile machinery manufacturing, and relates to an improvement of a carding machine movable cover driving mechanism, in particular to a carding machine movable cover driving device and a control method. Background Art

[0002] In the carding machine, the movable flat plate and the cylinder surface cooperate with each other to undertake the key task of carefully combing the fibers. The card clothing on the movable flat plate can grab the fibers on the cylinder surface, comb and sort them, and further decompose the fiber bundles into single fibers, thereby improving the quality of fiber combing. However, the stability of the movable flat plate operation plays an important role in its combing effect. At present, the transmission mode of the movable flat plate of existing carding machines at home and abroad is generally single-motor transmission. The movable flat plate motor of some models also drives the movable flat plate brush roller, such as Figure 5 、 Figure 6 shown.

[0003] With the development of the textile industry, the number of movable flats in carding machines has continued to increase, and the performance requirements for the movable flat motors have also increased. The disadvantages of the single-motor transmission method have gradually become apparent, such as the difficulty in meeting the needs of higher-precision carding and poor operating stability, which have restricted the improvement of the overall performance of the carding machine. For example, the movable flats of existing carding machines have problems with jamming, jitter, and deviation during transmission. In addition, existing carding machines also have the problem of easy wear of motors and transmission components, resulting in a short service life.

[0004] Designing a drive device and control method for the movable flats of a carding machine, improving the drive mechanism, simplifying the mechanical transmission structure, reducing energy consumption, overcoming the drawbacks of the single-motor drive method, further improving the stability of the movable flats' operation, and optimizing the fiber combing effect are urgent technical challenges in this field. Summary of the Invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a carding machine movable cover plate driving device and control method. The device can simplify the mechanical transmission structure, reduce energy consumption, overcome the disadvantages of the single-motor transmission mode, further improve the stability of the carding machine movable cover plate operation, and optimize the fiber combing effect. The control method is reasonable, has dual-motor speed detection and dynamic compensation functions, and can enhance the load adaptability.

[0006] The purpose of the present invention is achieved through the following technical solutions: A carding machine movable cover driving device comprises a movable cover, a movable cover motor, a movable cover transmission mechanism and an electrical control system, characterized in that the movable cover motor comprises a movable cover motor I and a movable cover motor II, the movable cover motor I and the movable cover motor II are both variable frequency motors, and the movable cover transmission mechanism comprises a movable cover transmission mechanism I and a movable cover transmission mechanism II; the electrical control system comprises a PLC controller and a human-computer interaction interface, the PLC controller comprises a speed sensor I, a speed sensor II, a motor speed calculation module and a frequency conversion control module, the human-computer interaction interface is electrically connected to the motor speed calculation module, the motor speed calculation module is electrically connected to the frequency conversion control module, the frequency conversion control module is respectively connected to the control ends of the movable cover motor I and the movable cover motor II, and controls the movable cover motor I and the movable cover motor II to respectively drive the movable cover transmission mechanism I and the movable cover transmission mechanism II to synchronously drive the movable cover to rotate.

[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 on 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 on 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 pulley I and the movable cover plate transmission pulley II on the same side, the movable cover plate transmission shaft I is parallel to the movable cover plate transmission shaft II and is arranged at the front and rear ends of the movable cover, and the movable cover is driven to operate by the two movable cover plate transmission pulleys I and the two movable cover plate transmission pulleys II.

[0008] Further improvement of the above technical solution: it also includes a left circular wall panel and a right circular wall panel, and the movable cover motor I and the movable cover motor II are arranged on the left circular wall panel or the right circular wall panel on the same side.

[0009] A further improvement to the above technical solution is that it also includes a brush roller, and the transmission 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 reduction motor or a servo motor, and the control end of the variable frequency reduction motor or servo motor is connected to the PLC controller.

[0011] A further improvement to the above technical solution is that it further comprises a cleaning roller, wherein the transmission shaft of the cleaning roller is connected to the rotating shaft of a cleaning roller motor via a cleaning roller transmission pulley.

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

[0013] A control method for the above-mentioned carding machine movable cover driving device is characterized in that the control method includes the following steps: Step 1: Setting a speed difference rate η threshold between the movable cover motor I and the movable cover motor II in the motor speed calculation module through the human-computer interaction interface, wherein the speed difference rate η is the percentage of the speed difference between the movable cover motor I and the movable cover motor II to the ratio of the normal speed of the motors; Step 2: Start the carding machine movable cover driving device to start working, the PLC controller controls the movable cover motor I and the movable cover motor II to respectively drive the movable cover transmission mechanism I and the movable cover transmission mechanism II to synchronously drive the movable cover to rotate normally; Step 3: Speed ​​sensors I and II respectively measure the speeds of the movable cover motor I and movable cover motor II, and send the measured data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between the movable cover motor I and the movable cover 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 is operating normally; Step 4: If the speed difference rate η is greater than the set speed difference rate η threshold and continues for a period of time, 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 to be reduced; if the speed difference rate η is still greater than the set speed difference rate η threshold and continues for a period of time, a movable cover fault signal is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop; Step 5: Manually reset the system on the human-machine interface, or power on the system again.

[0014] Improvement of the above technical solution: in step 1, the speed difference rate η threshold is set to 1%; in step 3, speed sensor I and speed sensor II collect and measure the speed of movable cover motor I and movable cover motor II with a sampling period of 5ms; in step 4, if the speed difference rate η is greater than 1% and lasts for at least 500ms, a warning signal is issued through the human-computer interaction interface, and at the same time, the PLC controller controls the rotation speed of the movable cover 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 fault signal is issued through the human-computer interaction 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 the present invention provide greater power output, which can easily cope with the problem of increasing the number of movable covers and make the movable covers run more smoothly; 2. The dual motors of the present invention drive the movable cover to different positions, which can make the movable cover more evenly stressed during movement, reduce the tilting and jamming of the movable cover during operation, and ensure the smooth operation of the movable cover; 3. The present invention uses dual motors to precisely control the movement of the movable cover, which can better comb the fibers, remove impurities and short fibers, improve the quality of the sliver, and lay a good foundation for the subsequent spinning process; 4. The stability and reliability of the equipment of the present invention are enhanced, the operating efficiency is improved, the equipment life is extended, and the maintenance cost is reduced; 5. The present invention has a dual-motor speed detection function, which enhances load adaptability. The electrical system can monitor errors and perform dynamic compensation. This reduces synchronization errors caused by wear and deformation accumulation of the drive shaft, belt, and gears, ensuring the synchronization and stability of the long-term movement of the movable cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a driving device for a movable cover of a carding machine according to the present invention; Figure 2 This is a structural schematic diagram of a movable cover driving device for a carding machine according to the present invention; Figure 3 The present invention is a principle block diagram of an electrical control system for a carding machine movable cover driving device; Figure 4 The present invention is a control flow chart of a carding machine movable cover driving device; Figure 5 This is a structural diagram of an existing carding machine with a single motor driving a movable cover; Figure 6 This is a structural diagram of an existing carding machine movable cover motor that also takes into account the brush roller transmission.

[0017] In the figure: 1. movable cover; 2. movable cover drive shaft I; 3. movable cover drive shaft II; 4. movable cover drive pulley I; 5. movable cover drive pulley II; 6. movable cover motor I; 7. movable cover motor II; 8. movable cover timing belt; 9. cylinder; 10. brush roller; 11. cleaning roller; 12. brush roller motor; 13. cleaning roller motor. DETAILED DESCRIPTION

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

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

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

[0021] Furthermore, the carding machine 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 reduction motor or servo motor, the control end of which is connected to the electrical control system. This allows for individual speed settings based on different spinning materials or process requirements, thereby increasing the automation level of the carding machine and improving the quality of the carded sliver.

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

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

[0024] See also Figures 1-4 A control method for the above-mentioned carding machine movable cover driving device is characterized in that the control method includes the following steps: Step 1: Setting a speed difference rate η threshold between the movable cover motor I 6 and the movable cover 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 motor I 6 and the movable cover motor II 7 to the ratio of the normal motor speed; Step 2: Start the carding machine movable cover drive device to start working, the PLC controller controls the movable cover motor I 6 and the movable cover motor II 7 to respectively drive the movable cover transmission mechanism I and the movable cover transmission mechanism II to synchronously drive the movable cover 1 to rotate normally; Step 3: The speed sensors I and II respectively measure the speeds of the movable cover motor I 6 and the movable cover motor II 7, and send the measured data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between the movable cover motor I 6 and the movable cover motor II 7, and compares it with the set speed difference η threshold in real time; if the speed difference η between the movable cover motor I 6 and the movable cover motor II 7 is less than the set speed difference η threshold, the movable cover 1 is operating normally; Step 4: If the speed difference rate η is greater than the set speed difference rate η threshold and continues for a period of time, 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 1 to be reduced; if the speed difference rate η is still greater than the set speed difference rate η threshold and continues for a period of time, a movable cover fault signal is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop; Step 5: Manually reset the system on the human-machine interface, or power on the system again.

[0025] Furthermore, in the above step 1, the speed difference rate η threshold is set to 1%. In the above step 3, the speed sensor I and the speed sensor II collect and measure the speed of the movable cover motor I and the movable cover motor II with a sampling period of 5ms; in the step 4, if the speed difference rate η is greater than the 1% speed difference rate η threshold and lasts for at least 500ms, an early warning signal is issued through the human-computer interaction interface, and at the same time, the PLC controller controls the rotation speed of the movable cover 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 fault signal is issued through the human-computer interaction 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 motor I 6 and movable cover motor II 7 to the ratio of the normal motor speed. If the normal speed of movable cover motor I 6 and movable cover motor II 7 is 100 rpm, when the actual speed of movable cover motor I 6 is 100 rpm and the actual speed of movable cover motor II 7 is 98 rpm, the speed difference rate η = (100-98 / 100)×100=2%. At this time, the speed difference rate η between movable cover motor I 6 and movable cover motor II 7 is greater than the set speed difference rate η threshold (1%). Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A carding machine movable cover driving device, comprising a movable cover, a movable cover motor, a movable cover transmission mechanism and an electrical control system, characterized in that: The movable cover motor includes a movable cover motor I and a movable cover motor II, and the movable cover motor I and movable cover motor II are both variable frequency motors. The movable cover transmission mechanism includes a movable cover transmission mechanism I and a movable cover transmission mechanism II; the electrical control system includes a PLC controller and a human-computer interaction interface, and the PLC controller includes a speed sensor I, a speed sensor II, a motor speed calculation module and a frequency conversion control module. The human-computer interaction interface is electrically connected to the motor speed calculation module, and the motor speed calculation module is electrically connected to the frequency conversion control module. The frequency conversion control module is respectively connected to the control ends of the movable cover motor I and the movable cover motor II, and controls the movable cover motor I and the movable cover motor II to respectively drive the movable cover transmission mechanism I and the movable cover transmission mechanism II to synchronously drive the movable cover to rotate.

2. The carding machine movable cover driving device according to claim 1, 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 a movable cover plate transmission pulley I is installed on 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 a movable cover plate transmission pulley II is installed on 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 pulley I and the movable cover plate transmission pulley II on the same side, the movable cover plate transmission shaft I is parallel to the movable cover plate transmission shaft II and is arranged at the front and rear ends of the movable cover, and the movable cover is driven to operate by the two movable cover plate transmission pulleys I and the two movable cover plate transmission pulleys II.

3. The carding machine movable cover driving device according to claim 1 or 2, characterized in that: It also includes a left circular wall plate and a right circular wall plate, and the movable cover motor I and the movable cover motor II are arranged on the left circular wall plate or the right circular wall plate on the same side.

4. The carding machine movable cover driving device according to claim 1 or 2, characterized in that: It also includes a brush roller, and the transmission shaft of the brush roller is directly connected to the rotating shaft of a brush roller motor.

5. The carding machine movable cover driving device according to claim 4, characterized in that: The brush roller motor is a variable frequency reduction motor or a servo motor, and the control end of the variable frequency reduction motor or the servo motor is connected to the PLC controller.

6. The carding machine movable cover driving device according to claim 1 or 2, characterized in that: The utility model also comprises a cleaning roller, wherein a transmission shaft of the cleaning roller is connected to a rotating shaft of a cleaning roller motor via a cleaning roller transmission pulley.

7. The carding machine movable cover driving device according to claim 4, characterized in that: The utility model also comprises a cleaning roller, wherein a transmission shaft of the cleaning roller is connected to a rotating shaft of a cleaning roller motor via a cleaning roller transmission pulley.

8. The carding machine movable cover driving device according to claim 6, characterized in that: The cleaning roller motor is an asynchronous motor, and the control end of the asynchronous motor is connected to the PLC controller.

9. A control method for a carding machine movable cover driving device according to any one of claims 1 to 8, characterized in that: The control method includes the following steps: Step 1: Setting a speed difference rate η threshold between the movable cover motor I and the movable cover motor II in the motor speed calculation module through the human-computer interaction interface, wherein the speed difference rate η is the percentage of the speed difference between the movable cover motor I and the movable cover motor II to the ratio of the normal speed of the motors; Step 2: Start the carding machine movable cover driving device to start working, the PLC controller controls the movable cover motor I and the movable cover motor II to respectively drive the movable cover transmission mechanism I and the movable cover transmission mechanism II to synchronously drive the movable cover to rotate normally; Step 3: Speed ​​sensors I and II measure the speeds of the movable cover motor I and movable cover motor II, respectively, and send the measured data to the motor speed calculation module. The motor speed calculation module calculates the speed difference η between the movable cover motor I and the movable cover 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 operates normally; Step 4: If the speed difference rate η is greater than the set speed difference rate η threshold and continues for a period of time, 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 to be reduced; if the speed difference rate η is still greater than the set speed difference rate η threshold and continues for a period of time, a movable cover fault signal is issued through the human-machine interface, and the PLC controller automatically controls the equipment to stop; Step 5: Manually reset the system on the human-machine interface, or power on the system again.

10. The control method of the carding machine movable cover driving device according to claim 9, characterized in that: In step 1, the speed difference rate η threshold is set to 1%. In step 3, speed sensor I and speed sensor II collect and measure the speeds of movable cover motor I and movable cover motor II with a sampling period of 5 ms. In step 4, if the speed difference rate η is greater than 1% and lasts for at least 500 ms, a warning signal is issued through the human-computer interaction interface, and at the same time, the PLC controller controls the rotation speed of the movable cover to be reduced by 20%; if the speed difference rate η is still greater than 1% and lasts for at least 500 ms, a movable cover fault signal is issued through the human-computer interaction interface, and the PLC controller automatically controls the equipment to stop.

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