JP2020531703A - How to operate the ring spinning machine and the ring spinning machine - Google Patents

Abstract

Disclosed is a method of operating a ring spinning machine (1) including a plurality of spindles (8), each containing one electric drive unit (9). Each electric drive unit (9) has a distributed control module (10), and the distributed control module (10) is a higher-level central control device (12) using a data bus (13, 14). It has a means (10) for communicating with. In the present invention, at least one section module (11) assigned to a plurality of distributed control modules (10) is provided, and the section control module (11) obtains information from the distributed control module (10). Information on rotor speed, rotor condition, spindle (8) operating condition, bearing condition or bearing damage or oil level is sought. The present invention also relates to a appropriately configured ring spinning machine (1) and a system for predictive maintenance (24).

Description

The present invention relates to a method of operating a ring spinning machine and a ring spinning machine described in the superordinate concept of the independent claim.

Conventional technology Ring spinning machines equipped with a single weight drive unit that replaces the belt drive unit have not been established today for various reasons compared to the conventional belt drive unit, but have been known for a long time. Correspondingly, there are many publications in this area, which specifically deal with the drive concept or mechanical frame, ie the mounting of this type of spindle unit on a spindle bench. For example, Swiss Patent Application Publication No. 689768 discloses this type of spinning machine with a single weight drive. European Patent Application Publication No. 1191132 and European Patent Application Publication No. 389894 also disclose spinning machines with a single weight drive.

The drive device includes an electric drive motor having a rotating action. The electrically driven motor acts on yarns, fibers, non-woven fabrics or braids via, for example, a manipulator provided on the end side of the shaft of the drive motor, provided in the form of a guide roller. More typically, it is provided with various external sensors and additional actuator elements, in particular, used to detect the position of yarns, fibers, non-woven fabrics or braids. Additional actuator elements are used, for example, to pre-tension or position yarns, fibers, braids or non-woven fabrics. Rotating electric drive motors are usually provided with overall elastic support, which on the one hand protects the drive from resonance problems and on the other hand provides sufficient operational stability and durability even at high speeds. Guarantee sex.

A distributed control module is provided for open-loop control or closed-loop control of the electric drive motor. Functionally, and usually spatially, distributed control modules provided as part of the drive also interact with external sensors and additional actuator elements. The distributed control module is connected to a higher level central control device via appropriate communication means.

The central control device coordinates multiple drives, especially for textile machinery. Basically, the use of such drives in textile machinery has proven to be effective for many years, but distributed systems are relatively large, expensive, and easy to assemble and maintain. It takes time and effort in terms of points.

European Patent Application Publication No. 2999096 relates to a textile machine comprising at least one drive, wherein the drive includes a rotating electric drive motor, which in any case. It has a stator that is partially surrounded by the drive motor housing. This stator has at least one coil. The electric drive motor further comprises a rotor on the shaft of the drive motor that is rotatably held with respect to the stator and at least one bearing for this shaft. The bearings include at least elastic means to support the individual functional components of the drive motor and a distributed control module assigned to the drive motor. The distributed control module has means for interacting with the drive motor on the one hand, interacting with at least one sensor of the drive device on the other hand, and even communicating with a higher level central control device. Here, at least one bearing provided to support the shaft is flexibly supported by the housing with respect to the stator via elastic means as follows. That is, the shaft is movably held with respect to the stator together with the rotor, an electrical synchronous motor is provided as a drive motor, and the position of the shaft with respect to the housing can be detected via the first sensor. Yes and / or supported so that the rotation angle of the shaft can be detected via a second sensor.

International Publication No. 2009123246 discloses a spinning machine including a single weight drive unit, in which the control unit includes four printed circuit boards, and each of these printed circuit boards is driven by a plurality of spindles. It is characterized by including an electronic device unit. Here, the supply of energy and the communication with the spindle-driven electronic device unit are performed on these printed circuit boards via a line path. Here, one board is formed as a section board, which includes a section electronic device unit and one or more connection interfaces, and external communication devices, a power supply, and a printed circuit board are mutually connected. They are connected in series.

Here, the relevant spindle-driven electronic device unit or section electronic device unit is designed to autonomously perform, for example, one or more of the following functions. That is, thread breakage detection, fiber bundle stop, single weight drive unit control, single weight drive unit heat monitoring, fiber bundle switching, spindle speed measurement, thread tension measurement, communication with assigned automatic mover, winding. Return operator guide, fault display, manual switch and / or other sensor functions. Advantageously, the thread breakage and / or the increase in thread tension can be identified by each spindle drive electronic device unit via the current or power consumption of the electric motor drive unit assigned to each work unit. For example, operation start and / or sequence control is performed by the machine control unit itself. This is effective, for example, both during a normal stop and during an emergency stop in the event of a power outage.

However, the drawback of these embodiments is that the communication of the central control device must be guaranteed, especially in the single weight drive unit. This is not possible via existing means of communication. Moreover, in the case of single weight drives, it is currently not possible to obtain further information about the spindle, spindle condition or spinning condition in the central control device and use it especially for predictive maintenance. ..

Description of the Invention Further, an object of the present invention is to realize a textile machine having a single weight drive unit, particularly a ring spinning machine, which is provided with information on the state of the spindle and can be used for predictive maintenance.

The above-mentioned issues are
-There is at least one section module assigned to many distributed control modules.
-Claim where the section control module is made to receive information from the distributed control module regarding rotor speed, rotor condition, spindle operating condition, bearing condition or bearing damage or oil level. It is solved by the method corresponding to the superordinate concept of 1.

The above-mentioned issues are
-There is at least one section module assigned to many distributed control modules.
-Here the section module has the means to communicate with the distributed control module.
The section module is designed to include a means for obtaining information on rotor speed, rotor condition, spindle operating condition, bearing condition or bearing damage or oil level. It is also solved by a ring spinning machine that corresponds to the concept.

Information about the load limit and / or current shape of the electric drive from the assigned distributed control module is queried by the section module, transmitted from the distributed control module to the section module, and evaluated by the section module. In an alternative embodiment, information about the load limit and / or current shape of the electric drive is evaluated by the assigned distributed control module and from this control module the section module assigned to this distributed control module. May be sent to. Advantageously, the section module would be able to query, informed, and evaluate all assigned distributed control modules in sequence. The section module will advantageously have a corresponding means for querying the assigned distributed control module.

The evaluation may include averaging or Fourier transform. Within the scope of the Fourier transform, especially short-time Fourier transforms, Gabor transforms, fast Fourier transforms or discrete Fourier transforms can be used as discrete cosine or discrete sine transforms in training. In the case of wavelet transform, in particular, discrete wavelet transform, fast wavelet transform, wavelet packet transform or stationary wavelet transform is used. Similarly, discrete static parameters of the signal can be used, omitting the conversion of the signal in the frequency domain. In particular, random variables such as expected value, absolute deviation, variance, skewness, excess or covariance are used as parameters. It is also possible that the signals are correlated, especially cross-correlated or autocorrelated. Finally, the combination of the transformed signal and the static parameters can be represented. The common intent is to compare the actual measured signal with the reference signal state, especially in the range of pattern recognition. Here the reference signal can be created from information on one or more adjacent spindles or can be read from memory. This is done in particular based on the particular features that are created from the signals and combined in the functional tools, based on information about the similarity of the signals in question.

The distributed control module can advantageously identify the thread breakage based on the load on the electric drive and notify the assigned section module of this. Here, the section module has a means for communication for transmitting information to the maintenance carriage about load limitation or thread breakage in the control module. In addition, the control module can advantageously use information from the current signal of the electric drive for closed loop control of spindle, rotor speed or thread tension.

Advantageously, information about rotor speed, rotor condition, spindle operating condition, bearing condition or bearing damage or oil level obtained from the single weight drive is predictively maintained via a central control device. Can be transferred to the system for. Systems for predictive maintenance advantageously have appropriate algorithms, which allow for the temporal transition of one or more data, the cross-correlation of various data measured by the spindle, and the database. Based on the comparison with the stored data, it is predicted which element such as the single weight drive unit and the ring traveler should be replaced when. The system also includes memory to store such data. This system allows the operator to plan the required maintenance in advance. In addition, predictive maintenance systems can be used with automated ordering systems, which allow for the required ordering of spare and worn parts, which can be used for timely maintenance.

An electrical synchronous or asynchronous motor or brushless DC motor may be provided as the electrical drive of the spindle. The spindle may have mechanical bearings and / or magnetic bearings.

The present invention also relates to computer program products that can be loaded directly into the internal memory of a ring spinning machine and include software code sections, which software code sections allow the computer program product to be loaded. When performed on a ring spinning machine, the steps of the method described in one of the preceding claims relating to the method of the invention are carried out.

Further advantages of the present invention are described in the following examples. Only features that are important to the present invention are shown. In different figures, the same features have the same reference numerals.

It is the schematic of the ring spinning machine provided with the single weight drive part. It is a schematic diagram of the communication system of a ring spinning machine.

Method of Carrying Out the Present Invention FIG. 1 schematically shows a ring spinning machine 1 of the present invention having a large number of unwinding portions 2 arranged adjacent to each other. Rewinding unit 2 in the longitudinal direction X of the ring spinning machine 1, it is disposed between the head portion 3 ₁ and the leg portion 3 _2. The head portion 3 ₁ and the foot portion 3 ₂ of the ring spinning machine 1 can include bearings, a drive unit, a control unit, and the like necessary for operating the machine. Further, for example, as can be seen in the two rewinding portions 2 schematically shown in FIG. 1, each rewinding portion 2 is arranged above the draft device 5, and the blister yarn 6 is wound around the rewinding portion 2. It consists of a blister bobbin 4. The blister yarn 6 travels from the blister yarn bobbin 4 via a draft device 5, is stretched there, and is guided by a yarn forming element. A rotating traveler or ring traveler wraps the finished thread around cup 7. The cup 7 is mounted on the spindle 8.

FIG. 2 schematically shows a communication system of the ring spinning machine 1. The ring spinning machine 1 has a single weight driving unit 9 for driving the spindle 8 in order to drive the spindle 8. As the single weight drive unit 9, an electric drive unit, for example, an electric synchronous motor, an asynchronous motor, a brushless DC motor, or an equivalent motor is used. Each single weight drive unit 9 is assigned to the distributed control module 10.

The spindle 8, the single weight drive unit 9, and the control module 10 are arranged on the spindle bench 22 of the ring spinning machine 1. The spindle bench 22 is shown only schematically, and the components present on the spindle bench 22 are correspondingly located within this element in FIG. The spindle bench 22 is advantageously movably supported. The connection portion of the electric drive unit 9 has a plurality of connection cables, which are integrated on the spindle bench 22 and connected to the power supply at the end portion of the spindle bench. It is advantageous that the connection to the electric drive unit 9 is realized by a plug connection.

The control module 10 has a task of monitoring the single weight drive unit 9 and executing a command from a higher level control unit. In the present invention, a plurality of distributed control modules 10 of the single weight drive unit 9 may be integrated. A large number of distributed control modules 10, such as 64 control modules 10, communicate with higher level section control modules 11. Two of the section control modules 11 are shown as examples in FIG. However, the number of section control modules 11 depends on the number of spindles 8, as indicated by the dashed control module 10. The section module 11 processes the information from the control module 10 and transfers this information. The plurality of distributed section control modules 11 communicate with one higher central control module 12 of the ring spinning machine 1. The central control module 12 is a central machine control unit that has all the machine data and statistically processes and visualizes them. For this purpose, the display 20 is connected to the central control module 12. Here, the machine data can be queried by the user via the display 20. Such data can also be transferred to mobile applications.

A mechanical data bus 13 is provided between the central control module 12 and the section control module 11, and a section data bus 14 is provided between the section control module 11 and the distributed control module 10. The section data bus 14 is in charge of communication between the control module 10 and the section control module 11, through which commands from the section module 11 are transmitted to the control module 10 to operate the electric drive unit 9 of the spindle 8. State or measurement data is guided from the control module 10 to the section control module 11.

Additionally, and independently of the data buses 13 and 14, a digital communication network 15 is provided so that the central control module 12 and the distributed control module 10 communicate with each other. Through this communication network 15, time-critical and safety-related information is transferred directly from the central control device 12 through the section control module 11 (broken line) to the control module 10. All distributed control modules 10 of the electric drive 9 can be contacted simultaneously by the central control device 12 via the communication network 15, eg, starting from the central control device 12 via the digital communication network 15. A signal / stop signal or a command for controlling an acceleration or deceleration gradient may be transmitted to the distributed control module 10.

FIG. 2 further shows a command element and a notification element 17, and exactly one command element and a notification element 17 are assigned to each single weight drive unit 9. These instruction elements and notification elements are arranged on the ring bench 23 of the ring spinning machine in the form of the operation element 17. The plurality of control modules 16 are connected to the instruction element and the notification element 17 via the section instruction bus 19, and are above them. The machine instruction bus 18 provides communication between the control module 16 and the central module 12. When the control module 10 confirms the error, such information is transmitted to and displayed at the assigned notification element 17 via the bus systems 14, 13, 18, and 19. Here, the operator can input an instruction (eg, start or stop) to the ring bench 23 at the instruction element 17, which is then sent back to the control module 10 via the bus systems 14, 13, 18, and 19. Is done.

From the distributed control module 10 of the single weight drive unit 9, a thread breakage or a creep spindle is obtained based on the current consumption (load limit). In the case of a mechanical bearing, the speed, the speed of the rotor, the state of the rotor, the operating state of the spindle, the state of the bearing or the damage to the bearing, the oil level and the like can be specified based on the current shape. If the spindle 8 is provided with a magnetic bearing, the weight of the cup 7 can additionally be identified via the current consumption of the active magnetic bearing. In the case of load limitation and associated thread breakage, a particular distributed control module 10 may notify the section control module 11. However, section module 11 can also query all assigned distributed control modules 10 in sequence. The information obtained in this way is then evaluated in sequence, and the operating state is obtained.

Section module 11 has a means of evaluating (calculating) the obtained information in order to obtain the obtained information. The calculation means include means for forming the root mean square of the current consumption and converting the current shape. In particular, the Hilbert-fan transform with Fourier transform, wavelet transform or empirical mode decomposition as the main components is used to transform the signal from the time domain to the frequency domain. Within the scope of the Fourier transform, especially short-time Fourier transforms, Gabor transforms, fast Fourier transforms or discrete Fourier transforms can be used as discrete cosine or discrete sine transforms in training. In the case of wavelet transform, in particular, discrete wavelet transform, fast wavelet transform, wavelet packet transform or stationary wavelet transform is used. Similarly, discrete static parameters of the signal can be used, omitting the conversion of the signal in the frequency domain. In particular, random variables such as expected value, absolute deviation, variance, skewness, excess or covariance are used as parameters. It is also possible that the signals are correlated, especially cross-correlated or autocorrelated. Finally, the combination of the transformed signal and the static parameters can be represented. The common intent is to compare the actual measured signal with the reference signal state, especially in the range of pattern recognition. Here the reference signal is created from the information of one or more adjacent spindles or read from memory. This is done in particular based on the particular features that are created from the signals and combined in the functional tools, based on the information about the similarity of the signals in question.

In an alternative embodiment, the control module 10 has the above (calculation) means for evaluating the operating state. Here they send the results to the assigned section module 11 for further processing. Further, the control module 10 can use the information from the current signal of the electric drive unit 9 for the closed loop control of the speed of the spindle 8 and the rotor and the closed loop control of the thread tension.

The maintenance carriage 21 shown in FIG. 1 moves along the longitudinal direction x of the rewinding portion of the ring spinning machine 1, for example to remove yarn breakage or other defects. When the control module 10 or section module 11 confirms thread breakage, creep spindle or other functional error in the above manner (current consumption, load limit, etc.), information can be transmitted to the maintenance carriage about the rewinding portion 2. .. The maintenance carriage then moves to this unwinding section 2, for example reassembling the thread or removing the defect in some other way. The communication is sent to the central control module 12, for example, via buses 13 and 14 that transmit information to the maintenance carriage.

Advantageously, information about rotor speed, rotor condition, spindle 8 operating condition, bearing condition or bearing damage or oil level obtained from the single weight drive is displayed on the spinning machine 1 itself. And / or transferred to the predictive maintenance system 24 via the central control device 12.

The system 24 for predictive maintenance has an appropriate algorithm, which allows for the temporal transition of one or more data, the cross-correlation of various data measured by the spindle, and the storage in the database. Based on the comparison with the data, it is predicted which element such as the single weight drive unit 9 and the ring traveler should be replaced when. The system 24 also includes a memory for storing such data. Such a system operating on a large amount of data (big data) is known, for example, from International Publication No. 2018/055508.

The system 24 for predictive maintenance also includes a display, which is the central display of the spinning mill where the individual machines, especially the ring spinning machine 1, are displayed. Here, the operator is informed in advance about the necessary maintenance of the machine, and the operator plans the necessary maintenance. The system 24 for predictive maintenance includes all necessary maintenance information, including operational guidance and indication of which maintenance must be performed on which machine and when. Such information may be transmitted to the ring spinning machine 1 and displayed on the local display 20 on the ring spinning machine 1. As soon as the operator completes the required maintenance steps, the operator inputs it to the display 20 or the central display to confirm the completion of the work.

The system 24 for predictive maintenance can also be used with an automatic ordering system, thus allowing the required ordering of spare and worn parts, which are used for the maintenance of the single weight drive 9 of the ring spinning machine 1. It can be used in a timely manner.

The present invention also relates to a computer program product that can be loaded directly into the internal memory of the ring spinning machine 1 and includes a software code section. These software code sections carry out the steps of the method described in one of the preceding claims relating to the method of the present invention when the computer program product is run on the ring spinning machine 1.

1 Ring spinning machine 2 Rewinding part 3 ₁ Ring spinning machine 1 head 3 ₂ Ring spinning machine 1 foot 4 Coarse thread bobbin 5 Draft device 6 Coarse thread 7 Cup 8 Spindle 9 Spindle 8 single weight drive unit 10 Single Distributed control module of weight drive unit 9 11 Section control module 12 Central control module 13 Machine data bus 14 Section data bus 15 Digital communication network 16 Control module of command element and notification element 17 17 Command element and notification element, operation unit 18 Machine Command Bus 19 Section Command Bus 20 Display 21 Maintenance Carriage 22 Spindle Bench 23 Ring Bench 24 Predictive Maintenance System 25 Ordering System

Claims (17)

A method of operating a ring spinning machine (1) including a plurality of spindles (8), wherein the spindles (8) are arranged on a spindle bench (22) and each has one electric drive unit (9). Includes
Each electric drive unit (9) has a distributed control module (10), and the distributed control module (10) interacts with the electric drive unit (9) and has a data bus (13, 14). In a method having means (10) for communication with a higher level central control device (12) using
At least one section module (11) assigned to a plurality of distributed control modules (10) is provided.
From the distributed control module (10), the section control module (11) relates to the speed of the rotor, the state of the rotor, the operating state of the spindle (8), the state of the bearing or the damage of the bearing or the oil level. An operating method of the ring spinning machine (1), which comprises receiving information. Information about the load limit and / or current shape of the electric drive unit (9) from the assigned distributed control module (10) is queried by the section module (11) and from the distributed control module (10). The method of operation of the ring spinning machine (1) according to claim 1, which is transmitted to the section module (11) and evaluated in the section module (11). The information regarding the load limit and / or current shape of the electric drive unit (9) is evaluated by the assigned distributed control module (10), and from the control module (10) to the distributed control module (10). The method of operation of the ring spinning machine (1) according to claim 1, which is transmitted to the assigned section module (11). The ring according to any one of claims 1 to 3, wherein the section module (11) sequentially queries all assigned distributed control modules (10) to obtain and evaluate the information. How to operate the spinning machine (1). The method of operating the ring spinning machine (1) according to any one of claims 1 to 4, wherein the evaluation includes mean value formation or a Fourier transform. The control module (10) uses the information of the current signal of the assigned electric drive unit (9) for the closed loop control of the speed of the spindle (8) and the rotor and the closed loop control of the yarn tension. , The method of operating the ring spinning machine (1) according to any one of claims 1 to 5. The information regarding the speed of the rotor, the state of the rotor, the operating state of the spindle (8), the state of the bearing or the damage of the bearing or the oil level is a system for predictive maintenance via the central control device (12). The method of operating the ring spinning machine (1) according to any one of claims 1 to 6, which is transferred to (24). The operation method of the ring spinning machine (1) according to claim 7, wherein the predictive maintenance system (24) is connected to an automatic ordering system (25) and orders necessary spare parts. The operation method of the ring spinning machine (1) according to claim 7 or 8, wherein the necessary maintenance is displayed on the display (20) of the ring spinning machine (1) or the system (24) for predictive maintenance. A ring spinning machine (1) that implements the method according to any one of claims 1 to 9.
It comprises a plurality of spindles (8), each containing one electric drive (9).
Each electric drive unit (9) has a distributed control module (10), and the distributed control module (10) interacts with the electric drive unit (9) and has a data bus (13, 14). In a ring spinning machine (1) having a means (10) for communicating with a higher level central control device (12) using).
At least one section module (11) assigned to the plurality of distributed control modules (10) is provided, and the section module (11) provides means for communicating with the distributed control module (10). Have and
The section module (11) includes means for obtaining information on rotor speed, rotor condition, operating condition of spindle (8), bearing condition or bearing damage or oil level. A ring spinning machine (1) characterized by. The section module (11) or the distributed control module (10) has means for evaluating the above-mentioned information, and the means for forming an average value of the information or performing a Fourier transform. 10. The ring spinning machine according to claim 10 (1). The ring spinning machine (1) according to claim 10 or 11, wherein the section module (11) has means for inquiring the assigned distributed control module (10). The central control device (12) provides information on the rotor speed, the rotor state, the operating state of the spindle (8), the bearing state or the bearing damage or the oil level. The invention according to any one of claims 10 to 12, which has a means for communication to the predictive maintenance system (24) in order to transfer to the predictive maintenance system (24) via the above. Ring spinning machine (1). The ring spinning machine (1) according to any one of claims 10 to 13, wherein the ring spinning machine includes a display (20) to display necessary maintenance and individual maintenance steps. The ring spinning machine (1) according to any one of claims 10 to 14, wherein the spindle (8) has a mechanical bearing and / or a magnetic bearing. A plurality of textile machines including at least one ring spinning machine (1) according to any one of claims 10 to 15, characterized in that it includes a system for predictive maintenance (24). It is a computer program product
The computer program product can be loaded directly into the internal memory of the ring spinning machine (1) and includes a software code section, which allows the computer program product to be placed on the ring spinning machine (1). A computer program product, characterized in that, when executed in 1), the steps of the method according to any one of claims 1 to 9 are performed.

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