A yarn covering machine power-off synchronous parking system

Abstract

This utility model discloses a power-off synchronous stopping system for a covering yarn machine, comprising an upper spindle frequency converter, a lower spindle frequency converter, a transverse servo driver, a winding servo driver, an upper roller servo driver, and a lower roller servo driver. The input terminals of the upper and lower spindle frequency converters are connected in parallel to an external power supply. The DC bus output terminals of the upper and lower spindle frequency converters are also connected in parallel to a DC bus. The input terminals of the transverse, winding, upper, and lower roller servo drivers are all connected to the DC bus. In this utility model, by connecting the DC bus output terminals of the upper and lower spindle frequency converters in parallel to the DC bus, and connecting them to the DC bus, power is supplied through the frequency converters when power is lost, enabling all transmission mechanisms to stop synchronously, thereby maintaining consistent twist in the equipment.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, and more specifically, to a power-off synchronous stop system for a covering yarn machine. Background Technology

[0002] Currently, the transmission control methods of covering yarn machines generally employ two types: mechanical transmission control and fully computerized servo control. Mechanical transmission includes servo forming and gearbox forming. Currently, gearbox forming has been largely replaced by electronic forming. In this method, a frequency converter controls two layers of spindles. The lower spindle motor drives the lower spindle and the large pulley at the tail of the machine via a belt drive, and then gears drive the feeding, drafting, and winding rotations to meet production requirements. The upper motor only drives the upper spindle, so the load on the lower layer is greater than that on the upper layer. When there is a power outage, the motors stop due to inertia, and the lower layer often stops faster than the upper layer, resulting in a twist difference between the two layers of yarn. Currently, electronic forming in covering yarn machines uses 220V servo motors. During a power outage, if the yarn guide is just at the edge, there is a chance it will exceed its stroke. Therefore, some manufacturers have installed 220V UPS power supplies. However, UPS power supplies are expensive, occupy a large space, and increase the economic burden on enterprises.

[0003] The fully computerized servo control system consists of two frequency converters and four servo motors. The two frequency converters control the upper and lower spindles respectively, while the four servo motors control the traversing, winding, drawing, and feeding processes. Currently, the servo motors on the market operate at 220V. In the event of a power outage, the four servo motors stop immediately, while the spindle continues to rotate due to inertia, resulting in a twist difference.

[0004] Therefore, a new solution is needed to address the above problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a power-off synchronous shutdown system for a covering yarn machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A power-off synchronous shutdown system for a covering yarn machine includes an upper spindle frequency converter, a lower spindle frequency converter, a transverse servo driver, a winding servo driver, an upper roller servo driver, and a lower roller servo driver. The input terminals of the upper spindle frequency converter and the lower spindle frequency converter are connected in parallel to an external power supply. The DC bus output terminals of the upper spindle frequency converter and the lower spindle frequency converter are connected in parallel to a DC bus. The input terminals of the transverse servo driver, the winding servo driver, the upper roller servo driver, and the lower roller servo driver are all connected to the DC bus. The upper spindle frequency converter, the lower spindle frequency converter, the transverse servo driver, the winding servo driver, the upper roller servo driver, and the lower roller servo driver are all connected to a controller.

[0008] Furthermore, the upper-level spindle frequency converter and the lower-level spindle frequency converter are medium-power frequency converters, and the rated power of the lower-level spindle frequency converter is greater than the rated power of the upper-level spindle frequency converter.

[0009] Furthermore, the pulse signal interface of the transverse servo driver is connected to the transverse servo pulse interface of the controller, and the direction signal interface of the transverse servo driver is connected to the transverse servo direction interface of the controller; the pulse signal interface of the winding servo driver is connected to the winding servo pulse interface of the controller, and the direction signal interface of the winding servo driver is connected to the winding servo direction interface of the controller; the pulse signal interface of the upper roller servo driver is connected to the upper roller servo pulse interface of the controller, and the direction signal interface of the upper roller servo driver is connected to the upper roller servo direction interface of the controller; the pulse signal interface of the lower roller servo driver is connected to the lower roller servo pulse interface of the controller, and the direction signal interface of the lower roller servo driver is connected to the lower roller servo direction interface of the controller.

[0010] Furthermore, the communication interfaces of the upper-level spindle frequency converter and the lower-level spindle frequency converter are connected to the frequency conversion communication interface of the controller.

[0011] Furthermore, the controller is connected to a human-machine interface.

[0012] The beneficial effects of this utility model are as follows: In this utility model, by connecting the DC bus output terminal of the upper spindle frequency converter in parallel with the DC bus output terminal of the lower spindle frequency converter and connecting them to the DC bus, when the power is off, the frequency converter supplies power so that each transmission mechanism can stop synchronously, thereby maintaining the consistent twist of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a power-off synchronous shutdown system for the covering yarn machine in this embodiment;

[0014] Figure 2This is a schematic diagram of a connection structure between the upper spindle frequency converter and the lower spindle frequency converter in this embodiment;

[0015] Figure 3 This is a schematic diagram of a connection structure for the transverse servo driver, the winding servo driver, the upper roller servo driver, and the lower roller servo driver in this embodiment.

[0016] Figure 4 This is a schematic diagram of a connection structure between the human-machine interface and the switching power supply in this embodiment;

[0017] Figure 5 This is a schematic diagram of one structure of the controller in this embodiment;

[0018] Figure 6 This is a flowchart of a power outage synchronous shutdown system for the covering yarn machine in this embodiment.

[0019] Figure reference numerals: 1. Upper spindle frequency converter; 2. Lower spindle frequency converter; 3. Transverse servo drive; 4. Winding servo drive; 5. Upper roller servo drive; 6. Lower roller servo drive; 7. Controller; 8. Human-machine interface; 9. Switching power supply; 10. Circuit breaker; 11. External power supply; 12. DC bus. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: A power-off synchronous shutdown system for a covering yarn machine, such as... Figures 1-6 As shown, it includes an upper spindle frequency converter 1 for connecting to the upper spindle, a lower spindle frequency converter 2 for connecting to the lower spindle, a transverse servo driver 3 for connecting to the transverse servo motor, a winding servo driver 4 for connecting to the winding servo motor, an upper roller servo driver 5 for connecting to the upper roller servo motor, a lower roller servo driver 6 for connecting to the lower roller servo motor, and a controller 7.

[0022] Furthermore, such as Figure 1 and Figure 2 As shown, the input terminal of the upper spindle inverter 1 is connected in parallel with the input terminal of the lower spindle inverter 2, and is connected to an external power supply 11. The external power supply 11 is a three-phase 380V AC power supply, and the L1, L2, and L3 terminals of the external power supply 11 are connected to the input terminals of the upper spindle inverter 1 and the lower spindle inverter 2. Preferably, a circuit breaker 10 is installed on the L1, L2, and L3 terminals of the external power supply 11.

[0023] Furthermore, such as Figure 2 As shown, the DC bus output terminal of the upper spindle inverter 1 is connected in parallel with the DC bus output terminal of the lower spindle inverter 2, and connected to DC bus 12. That is, the output terminals P+ of the upper spindle inverter 1 and the lower spindle inverter 2 are connected to the positive bus, and the output terminals P- of the upper spindle inverter 1 and the lower spindle inverter 2 are connected to the negative bus. By setting the upper spindle inverter 1 and the lower spindle inverter 2 to share the same DC bus 12, the analog frequencies of the upper spindle inverter 1 and the lower spindle inverter 2 are synchronized, thereby facilitating the lower spindle to directly control the upper spindle frequency converter proportionally.

[0024] Preferably, both the upper spindle inverter 1 and the lower spindle inverter 2 are medium-power inverters, with the rated power of the lower spindle inverter 2 exceeding that of the upper spindle inverter 1. The use of medium-power inverters, such as a 7.5kW inverter for the upper spindle inverter 1 and an 11kW inverter for the lower spindle inverter 2, increases the power of the inverters, thereby increasing the capacitance of their internal capacitors. This provides sufficient power to complete synchronous stopping within a certain time (a few seconds). In other words, during power failure, the capacitors within the inverters discharge to power the various drive mechanisms, achieving synchronous stopping. Setting the power of the lower spindle inverter 2 to be greater than that of the upper spindle inverter 1 accommodates the higher load requirements of the lower spindle inverter 2.

[0025] like Figure 1 and Figure 3 As shown, the input terminals of the transverse servo drive 3, winding servo drive 4, upper roller servo drive 5, and lower roller servo drive 6 are all connected to DC bus 12. The upper spindle inverter 1, lower spindle inverter 2, transverse servo drive 3, winding servo drive 4, upper roller servo drive 5, and lower roller servo drive 6 are all connected to controller 7. Controller 7 is a PLC controller, model XD5-32T4-C. Specifically:

[0026] like Figure 2 , Figure 3 and Figure 5As shown, the pulse signal interface of the transverse servo drive 3 is connected to the transverse servo pulse interface of the controller 7, and the direction signal interface of the transverse servo drive 3 is connected to the transverse servo direction interface of the controller 7; the pulse signal interface of the winding servo drive 4 is connected to the winding servo pulse interface of the controller 7, and the direction signal interface of the winding servo drive 4 is connected to the winding servo direction interface of the controller 7; the pulse signal interface of the upper roller servo drive 5 is connected to the upper roller servo pulse interface of the controller 7, and the direction signal interface of the upper roller servo drive 5 is connected to the upper roller servo direction interface of the controller 7; the pulse signal interface of the lower roller servo drive 6 is connected to the lower roller servo pulse interface of the controller 7, and the direction signal interface of the lower roller servo drive 6 is connected to the lower roller servo direction interface of the controller 7. The communication interfaces of the upper spindle inverter 1 and the lower spindle inverter 2 are connected to the inverter communication interface of the controller 7.

[0027] like Figure 6 As shown, when power is off, the voltage of DC bus 12 decreases, and the lower spindle outputs a power-off signal. Then, the controller 7 reads the frequency of the lower spindle and controls the transverse servo motor, winding servo motor, upper roller servo motor, and lower roller servo motor respectively through the transverse servo driver 3, winding servo driver 4, upper roller servo driver 5, and lower roller servo driver 6. The control includes position control, speed control, and torque control. At the same time, the lower spindle directly controls the upper spindle frequency conversion according to the frequency ratio between the frequency converters. The two work together to achieve synchronous stopping. That is, when power is off, power is supplied through the frequency converter so that each transmission mechanism can stop synchronously and maintain consistent twist of the equipment.

[0028] Furthermore, such as Figure 4 and Figure 5 As shown, the controller 7 is connected to the human-machine interface 8, and the human-machine interface 8 is connected to the switching power supply 9. The input voltage of the switching power supply 9 is 220V and the output voltage is 24V. The switching power supply 9 is used to supply power.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A power-off synchronous stop system for a covering yarn machine, comprising an upper spindle frequency converter (1), a lower spindle frequency converter (2), a transverse servo driver (3), a winding servo driver (4), an upper roller servo driver (5), and a lower roller servo driver (6), characterized in that, The input terminal of the upper spindle inverter (1) is connected in parallel with the input terminal of the lower spindle inverter (2) and connected to an external power supply (11). The DC bus output terminal of the upper spindle inverter (1) is connected in parallel with the DC bus output terminal of the lower spindle inverter (2) and connected to a DC bus (12). The input terminals of the transverse servo driver (3), the winding servo driver (4), the upper roller servo driver (5), and the lower roller servo driver (6) are all connected to the DC bus (12). The upper spindle inverter (1), the lower spindle inverter (2), the transverse servo driver (3), the winding servo driver (4), the upper roller servo driver (5), and the lower roller servo driver (6) are all connected to a controller (7).

2. The power-off synchronous stop system for a covering yarn machine according to claim 1, characterized in that, The upper spindle inverter (1) and the lower spindle inverter (2) are medium-power inverters, and the rated power of the lower spindle inverter (2) is greater than the rated power of the upper spindle inverter (1).

3. The power-off synchronous stop system for a covering yarn machine according to claim 1, characterized in that, The pulse signal interface of the transverse servo driver (3) is connected to the transverse servo pulse interface of the controller (7), and the direction signal interface of the transverse servo driver (3) is connected to the transverse servo direction interface of the controller (7); the pulse signal interface of the winding servo driver (4) is connected to the winding servo pulse interface of the controller (7), and the direction signal interface of the winding servo driver (4) is connected to the winding servo direction interface of the controller (7); the pulse signal interface of the upper roller servo driver (5) is connected to the upper roller servo pulse interface of the controller (7), and the direction signal interface of the upper roller servo driver (5) is connected to the upper roller servo direction interface of the controller (7); the pulse signal interface of the lower roller servo driver (6) is connected to the lower roller servo pulse interface of the controller (7), and the direction signal interface of the lower roller servo driver (6) is connected to the lower roller servo direction interface of the controller (7).

4. The power-off synchronous stop system for a covering yarn machine according to claim 1, characterized in that, The communication interfaces of the upper spindle inverter (1) and the lower spindle inverter (2) are connected to the frequency conversion communication interface of the controller (7).

5. The power-off synchronous stop system for a covering yarn machine according to claim 1, characterized in that, The controller (7) is connected to the human-machine interface (8).

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