Textile machine and method for operating same

Abstract

The invention relates to a textile machine (1) with a control unit (11) and working elements (31, 33, 34, 38, 44) and a power supply unit (43) which is connected to a spinning mill power grid (25) and includes electrical power supplies (24, 32, 35) for supplying the working elements (31, 33, 34, 38, 44, 33).To enable the operating personnel of the textile machine (1) to detect an impending power overload of a working element (31, 33, 34, 38, 44) or a power supply unit (24, 32, 35) of the textile machine (1) at an early stage, i.e., in advance, the invention provides that the control unit (11) of the textile machine (1) has a control and evaluation unit (41) in which the respective power consumption of a power supply unit (24, 32, 35) or a working element (31, 33, 34, 38, 44) is stored based on characteristic curve fields created from various predefinable parameters, wherein the control and evaluation unit (41) is designed to predict the power consumption of the electrical power supply unit (24, 32, 35) or the working element (31, 33, 34, 38, 44) when a or several parameters of a characteristic curve field of a working element (31, 33, 34, 38, 44) are adjusted.

Description

[0001] The invention relates to a textile machine with a control unit, working elements, and a power supply device that can be connected to a spinning mill's power grid and includes electrical power supplies for supplying the working elements. The invention further relates to a method for operating the textile machine.

[0002] The invention relates in particular to a textile machine producing cross-wound bobbins with a plurality of work stations, each of which has an open-end rotor spinning device with working elements that can be actuated by an individual motor.

[0003] Textile machines producing cross-wound bobbins, which have a control unit, in particular a central control unit, and a plurality of work stations, each of which is equipped with individually motorized working elements, the power supplies of which are connected to the power grid of a corresponding industrial plant, are known in various embodiments and are disclosed in the patent literature in numerous applications.

[0004] EP 2 562 114 A2, for example, describes an automatic winder equipped with a plurality of workstations, each of which has a variety of electrical components and drives. The automatic winder also has a control and evaluation device in which load information from the various components is recorded and stored in such a way that later fault analysis is possible if necessary. This load information includes, for example, temperature, voltage, and electrical current; the electrical power is calculated from the voltage and current and also stored. If an unexpected increase in one or more of these variables occurs, it is concluded that a fault has occurred.

[0005] However, the status data of a textile machine's drives can be used not only for subsequent error analysis, as described in EP 2 562 114 A2, but also for other purposes. Since precise current and voltage measurements are necessary for proper control of the frequency converters of variable-speed drives in a textile machine, the drive status data can also be used effectively during ongoing operation of the textile machine. Furthermore, in connection with the operation of such textile machines, the optimization of energy consumption is becoming increasingly important.

[0006] For example, DE 10 2006 040 892 A1 proposes optimizing the electrical energy consumption of spinning machines, in this example ring spinning machines or flyers, by recording the energy consumption of the electrical consumers and calculating key figures from the energy consumption determined at discrete speeds of the spinning machine and the production achieved at these speeds. This means that the measured energy consumption is set in relation to the level of production achieved. To record energy consumption, the energy consumption of power supply devices, e.g., frequency converters, is measured at drives, such as motors with speed-dependent energy consumption, and automatically converted into characteristic curves in an evaluation device.

[0007] Furthermore, DE 10 2014 016 785 A1 describes, using a ring spinning machine as an example, how the total power consumption of a textile machine can be calculated based on the status data of the electric drives. The textile machine has a correspondingly designed digital control unit for this purpose. This means that the status data required for calculating the total power consumption are permanently stored in the digital control system of this known textile machine, so that only a corresponding software input is required to calculate the total power consumption.

[0008] However, the textile machines described above and their control and evaluation devices have the disadvantage that only the current or only the past total power consumption of the textile machine can be determined.

[0009] Based on the aforementioned prior art, the object of the invention is to develop a device or method that enables the operator of the textile machine to check in advance how the power consumption of a power supply or a working element will develop if one or more parameters of the characteristic curve of the working element are changed. This means that with the device according to the invention, the operator can check in advance whether changing one or more parameters of the characteristic curve of a working element could result in the permissible power consumption of the power supply or the relevant working element of the textile machine being exceeded, with the result that the textile machine is shut down by an emergency stop circuit due to overheating.

[0010] This object is achieved according to the invention in that the control unit of the textile machine has a control and evaluation device in which the respective power consumption of a power supply unit or a working element is stored on the basis of characteristic curve fields which were created from various predeterminable parameters, wherein the control and evaluation device is designed in such a way that it calculates from the characteristic curve fields how the power consumption of the electrical power supply unit or the working element develops when one or more parameters of a characteristic curve field of a working element is / are adjusted.

[0011] Advantageous embodiments of the invention are the subject of the subclaims.

[0012] The invention has the particular advantage that, with the aid of the control and evaluation device, operating personnel can easily check in advance how the energy consumption of the power supplies and the working elements would develop if one or more parameters of the characteristic curve of the working elements were / are changed. This means that operating personnel can quickly and reliably check, without any negative consequences, whether an adjustment of one or more parameters of the characteristic curve of the working elements could potentially result in an "emergency stop" of the textile machines because, for example, the power consumption of a power supply and / or a working element and / or the total power consumption of the textile machine would increase unacceptably.

[0013] For this purpose, the control and evaluation device preferably comprises a display which is designed to display the pre-calculated power consumption.

[0014] Preferably, the control and evaluation device is configured to compare the predicted power consumption with a permissible power consumption and to signal a warning if the permissible power consumption is exceeded. As part of this warning, the operating personnel can be prompted, for example, via the display, not to make the entered parameter changes or to set or enter other parameters.

[0015] The textile machine preferably comprises a plurality of workstations, wherein the workstations have working elements which can be actuated by individual motors and whose power consumption is calculated in advance.

[0016] In the context of multiple work elements at a workstation that can be driven by individual motors, it is particularly advantageous to predict the power consumption of a power supply assigned to the workstation, which supplies the work elements that can be driven by individual motors. In such a topology, the power supply of the workstation often represents the bottleneck.

[0017] The textile machine can also have central working elements whose power consumption is calculated in advance. Such a central working element could, for example, be the drive of a suction system. The suction system can, for example, provide a predetermined spinning vacuum.

[0018] In an advantageous embodiment, the electric motor-operated working elements are assigned to the work station of an open-end rotor spinning device. The electric motor-operated working elements preferably comprise the individual drive for the sliver feed cylinder, the individual drive for the sliver opening roller, the individual drive for the spinning rotor, and the individual drive for the thread take-off device. Accordingly, the parameters for the characteristic curves of these working elements include the yarn count, the fiber type, the twist coefficient, the rotor diameter, the rotor speed, the opening roller speed, and / or the spinning vacuum. This means that the power consumption of the working elements is characterized by one or more of the parameters described above, depending on which of the working elements is to be readjusted. The power consumption of the spinning rotor drive, for example, isprimarily depends on the rotor diameter and rotor speed, while the power consumption of the opening roller drive is strongly dependent on, for example, the opening roller speed, the fiber type, and / or the yarn count. The power consumption of the individual drives also influences the power consumption of a power supply unit, whose power consumption is also preferably calculated in advance.

[0019] The textile machine according to the invention does not necessarily have to be designed as an open-end rotor spinning machine, but can also be designed as a ring spinning machine. The spindle speed, the rotor weight, and / or the ring diameter can then be considered as parameters for the characteristic curves of the working elements.

[0020] The textile machine can also be designed as a winding machine. In this case, the winding speed can be considered as a parameter for the characteristic curves of the working elements.

[0021] In a further advantageous embodiment, the control and evaluation device of the textile machine also takes into account special operating conditions of the textile machine when determining the power consumption of the power supplies or the working elements. This means that such special operating conditions to be taken into account include, for example, spinning interruptions occurring during the spinning / winding operation of the textile machine and / or the statistical average number of workstations operating simultaneously during the spinning / winding operation of the textile machine.

[0022] The power consumption of an electrical power supply or a working element is also determined for such special operating states, with the control and evaluation system of the textile machine, for example, working with empirical values. This means that when calculating the total power consumption of a textile machine or the power consumption of a power supply, the power consumption of the working elements stored as empirical values are taken into account when the working elements are in the ON operating state.

[0023] The method according to the invention, which is used when operating a textile machine with the features described in the main claim, is characterized in that the control unit of the textile machine has a control and evaluation device in which the power consumption of power supplies or individual working elements is stored on the basis of characteristic curve fields created from various parameters, wherein the control and evaluation device calculates how the power consumption of the electrical power supply or the working element develops when one or more parameters of the characteristic curve field of a working element is / are adjusted.

[0024] The operating personnel can thus quickly, easily and reliably check whether, when readjusting one or more parameters of the characteristic field of a working element, there is a risk that the power consumption of a power supply unit or a working element and / or the total power consumption of the textile machine will increase to such an extent that a permissible power consumption of individual components is exceeded and an "emergency stop" circuit of the textile machine is threatened.

[0025] The invention is explained in more detail below with reference to an embodiment shown in the drawings.

[0026] It shows: Fig. 1 in perspective view a textile machine producing cross-wound bobbins, in the exemplary embodiment an open-end rotor spinning machine, with a central control unit which has a control and evaluation device designed according to the invention, Fig. 1A a schematic representation of an energy supply device of a textile machine according to the invention, Fig. 2 in side view, highly schematic, a work station of the in Figure 1 illustrated textile machine with a service unit positioned in the area of a work station, Fig. 3 the individually motor-driven working elements of the open-end rotor spinning device of such a work station, partly in section, Fig. 4A a first example of a characteristic curve field, Fig. 4B another example of a characteristic curve field.

[0027] The Figure 1shows a perspective view of a textile machine producing cross-wound bobbins, in this embodiment an open-end rotor spinning machine 1, with a central control unit 11 equipped with a control and evaluation device 41 designed according to the invention. Such open-end rotor spinning machines 1 are known to have a plurality of work stations 2, each of which is equipped, among other things, with an open-end rotor spinning device 3 and a winding device 4. Such open-end rotor spinning machines 1 are also often supplied by service units 5, which intervene when action is required at a work station 2. Such action is required, for example, when a finished cross-wound bobbin 7 needs to be replaced with a fresh empty tube 9 at one of the work stations 2.

[0028] As is known and therefore not explained in more detail, in the open-end rotor spinning devices 3 of the open-end rotor spinning machine 1, fiber ribbons stored in spinning cans 6 are spun into threads 30, which are then wound onto the winding devices 4 to form cross-wound bobbins 7. The winding devices 4 are for this purpose, as shown in the Figures 2 and 3 shown schematically, each equipped with a bobbin frame 8 for rotatably holding an empty tube 9 or a cross-wound bobbin 7, a winding drum 10 for the defined rotation of these elements and with a thread traversing device 26.

[0029] The illustrated open-end rotor spinning machine 1 also has, as already indicated above, a central control unit 11 equipped with a control and evaluation device 41 designed according to the invention. The central control unit 11 is connected via a bus system 12 to the control devices 13 of the workstations 2 and to the control devices 19 of the service units 5.

[0030] Furthermore, such open-end rotor spinning machines 1 are often equipped with a cross-wound bobbin transport device 14 for disposing of finished cross-wound bobbins 7 and an empty bobbin supply device, which essentially consists of an empty bobbin magazine 15 and bobbin feed tracks 16. The service units 5 are movable along the work stations 2 on guide rails 17, 18, which are arranged on or at the open-end rotor spinning machine 1, and can be positioned at a requesting work station 2 if required, as shown in Figure 2 is shown schematically.

[0031] To supply the electrical components with electrical energy, the open-end rotor spinning machine 1 has a power supply device 43. The power supply device 43 is connected to a spinning mill power grid 25 for this purpose. The power supply device 43 comprises several power supplies that are adapted to the structure and type of drives used in the open-end rotor spinning machine 1. In the present exemplary embodiment, the open-end rotor spinning machine 1 comprises an internal DC voltage network 45, via which the individual workstations 2 are supplied with electrical energy. The DC voltage network 45 is fed from the spinning mill power grid 25 via the central power supply unit 24. The power supply unit 24 is designed as a rectifier for this purpose. To supply the workstations 2, each workstation 2 has its own power supply unit 35, which reduces the voltage of the DC voltage network 45.

[0032] The power supply device 43 has another central power supply 32, which is also fed from the spinning mill's power grid 25. The power supply 32 is designed as an inverter. The power supply 32 supplies electrical energy to the motor 33 of a central suction system (not shown in detail). The suction system provides a vacuum required for the open-end rotor spinning devices 3 of the workstations 2.

[0033] The Figure 2 shows in side view, highly schematically, a work station 2 of an open-end rotor spinning machine 1 with a service unit 5 positioned in front of the work station 2.

[0034] The workstations 2 of such open-end rotor spinning machines 1 each have an open-end rotor spinning device 3, with various, as in Figure 3shows in more detail, individually motor-driven working elements and a winding device 4 with a bobbin frame 8 in which a cross-wound bobbin 7 or an empty tube 9 is rotatably mounted. During the spinning / winding operation, the cross-wound bobbin 7 or the empty tube 9 rests on a winding drum 10, which drives the cross-wound bobbin 7 or the empty tube 9 with frictional engagement.

[0035] Such winding devices 4 are generally also equipped with a thread traversing device 26, which ensures that the thread 30 produced in the open-end rotor spinning device 3 is wound in intersecting layers onto the winding bobbin mounted in the bobbin frame 8.

[0036] As can be seen further, each work station 2 also has a work station-specific control device 13, which is connected to the central control unit 11 of the open-end rotor spinning machine 1 via a bus system 12, a thread take-off device 21 which can be driven by an individual motor, and a work station-specific, pivotably mounted suction nozzle 29.

[0037] Furthermore, a cross-wound bobbin transport system 14 and tube feed tracks 16 are arranged behind or above the work stations 2.

[0038] The service units 5, which are generally identical in design and mounted on guide rails 17, 18 for movement along the work stations 2, are used in particular when a cross-wound bobbin / empty tube change is required at one of the work stations 2. In addition to a control device 19, which is connected to the central control unit 11 of the open-end rotor spinning machine 1 via the bus system 12, the service units 5 each have various handling devices that enable the service unit 5 to carry out a proper cross-wound bobbin / empty tube change if necessary and, in the process, also provide a piecing thread to the open-end rotor spinning device 3 of the respective work station 2. Such a service unit 5 has, for example, a so-called frame opener (not shown) and an ejection and drive arm (also not shown) that can be positioned against the surface of the cross-wound bobbin 7.The service unit 5 also has a tube gripping device 20, with which empty tubes 9, which are conveyed via the tube feed tracks 16 into the area of the work stations 2, can be picked up and transferred into the bobbin frame 8. Furthermore, such service units 5 are equipped with an auxiliary thread delivery device 22 for providing a piecing thread, a thread application and thread laying device 23, and a thread transfer device 28.

[0039] Since the operation of such service units 5 is known, further explanations will be omitted.

[0040] The Figure 3shows an open-end rotor spinning device 3 with an associated yarn take-off device 21 on a larger scale, partially in section. As can be seen, both the various working elements of the open-end rotor spinning device 3 and the yarn take-off device 21 are each driven by individual motors. This means that the spinning rotor 40, which is mounted contactlessly, for example, in a magnetic bearing, is actuated by an individual electric motor drive 34. The individual drive 34 of the spinning rotor 40 is connected directly to the power supply 35 of work station 2 for the supply of electrical energy. The individual drive 34 of the spinning rotor 40 has its own control device (not shown), which controls the spinning rotor 40 as required. Work station 2 has its own control device 13, which is also supplied with electrical energy by the power supply 35 of work station 2.The control device 13 is in turn connected via a bus system 12 to the central control unit 11 of the open-end rotor spinning machine 1 and thus to the control and evaluation device 41.

[0041] The control device 13 of work station 2 controls the operation of other individual drives of work station 2. This includes the individual drive 31 of the sliver opening roller 27, which is connected to the control device 13 via a control line 42. Accordingly, the individual drive 38 of the sliver feed cylinder 37 is actuated via the control line 39. The thread take-off device 21 is driven by the individual drive 44, which in turn is connected to the control device 13 via the control line 36.

[0042] As indicated above, the individual electric motor drives 31, 34, 38, 44 of the various working elements of an open-end rotor spinning device 3 can be driven at a defined speed as required. The power consumption of such drives sometimes increases significantly depending on various parameters, e.g., the speed.

[0043] The Figures 4A and 4BUsing diagrams, they show examples of characteristic curves stored in the control and evaluation device 41 of the central control unit 11 of the open-end rotor spinning machine 1. With the aid of these diagrams, the electrical power consumption of the individual drives 31, 34, 38, 44 of the various drive components of the open-end rotor spinning device 3 can be easily determined at specific speeds. Accordingly, the electrical power consumption of the power supply unit 35 of workstation 2 results from the sum of the electrical power consumption of the individual components to be supplied.

[0044] The Figure 4Ashows, for example, a characteristic curve family used to determine the development of the power consumption of the individual drive 34 of an open-end spinning rotor 40. In this exemplary embodiment, the rotor diameter and the rotor speed are taken into account as parameters. Curve 48 shows the development of the power consumption of the individual drive 34 for a spinning rotor 40 with a relatively small diameter. Curves 49 and 50 show, respectively, the development of the power consumption of the individual drive 34 for spinning rotors with medium and large diameters. The range of the critical power consumption of the spinning rotor drive 34 is also marked in the diagram with the reference symbol 51.

[0045] The Figure 4BUsing a characteristic curve field, it shows the development of the power consumption of the individual drive 31 of a sliver opening roller 27. In connection with the development of the power consumption of the individual drive 31 of a sliver opening roller 27, parameters taken into account include, for example, the yarn count, in addition to the opening roller speed. Curves 53, 54, and 55 show, by way of example, the development of the power consumption of the individual drive 31 for different yarn counts, with curve 53 showing the development for fine yarn counts, curve 54 for medium yarn counts, and curve 55 for somewhat coarser yarn counts.

[0046] Other parameters influencing the power consumption of an individual drive may include, for example, the fiber type and / or spinning interruptions occurring during the spinning / winding operation of the textile machine 1. In these cases, too, a relatively accurate determination of the power consumption of the individual drives of an open-end rotor spinning device 3 or the total power consumption of the textile machine 1 under a specific operating condition is possible in advance using appropriate characteristic curves in a relatively simple manner. List of reference symbols

[0047] 1 Open-end rotor spinning machine 29 suction nozzle 2 workplace 30 thread 3 Open-end rotor spinning device 31 Single drive / opening roller 4 winding device 32 Power supply / suction system 5 Service unit 33 Engine / intake system 6 spinning can 34 Single drive / spinning rotor 7 cross-wound bobbin 35 Power supply / workstation 8 spool frame 36 Control line / thread take-off device 9 Empty tube 10 winding drum 37 Sliver feed cylinder 11 Central control unit 38 Single drive / sliver feed cylinder 12 Bus system 13 Control device / workstation 39 Control cable / fiber ribbon feed cylinder 14 Cross-wound bobbin transport system 15 Empty cartridge magazine 40 spinning rotor 16 Core feed track 41 Control and evaluation device 17 guide rail 42 Control line / opening roller 18 guide rail 43 Energy supply facility 19 Control unit / service unit 44 Single drive / thread take-off device 20 Tube gripping device 45 DC voltage network 21 Thread take-off device 22 Auxiliary thread delivery device 48 Rotor diameter / small 23 Thread application and thread laying device 49 Rotor diameter / medium 50 Rotor diameter / large 24 central power supply 51 critical upper limit 25 Spinning mill power grid 26 Thread traversing device 53 Yarn count / fine 27 Sliver opening roller 54 Yarn count / medium 28 Thread transfer device 55 Yarn count / thick

Claims

1. Textile machine (1) comprising a control unit (11), working elements (31, 34, 38, 44) and a power supply device (43) which can be connected to a spinning mill power grid (25) and comprises electrical power supply units (24, 32, 35) for supplying the working elements (31, 33, 34, 38, 44), characterized in that the control unit (11) of the textile machine (1) has a control and evaluation device (41) in which the particular power consumption of a power supply unit (24, 32, 35) or of a working element (31, 33, 34, 38, 44) is stored on the basis of characteristic curve fields created from various predeterminable parameters, the control and evaluation device (41) being designed such that it precalculates the power consumption of the electrical power supply unit (24, 32, 35) or of the working element (31, 33, 34, 38, 44) when one or more parameters of a characteristic curve field of the working element (31, 33, 34, 38, 44) is / are adjusted and in that the control and evaluation device (41) is designed to compare the precalculated power consumption with a permissible power consumption and, if the permissible power consumption is exceeded, to signal a warning and / or to prevent the effective entry of the parameters leading to the exceedance.

2. Textile machine (1) according to claim 1, characterized in that the control and evaluation device (41) comprises a display which is designed to display the precalculated power consumption.

3. Textile machine (1) according to either of the preceding claims, characterized in that the textile machine (1) comprises a plurality of workstations (2), the workstations (2) having working elements (31, 33, 34, 38, 44) which can be actuated by individual motors and the power consumption of which is precalculated.

4. Textile machine (1) according to any of the preceding claims, characterized in that the textile machine (1) has a central working element, in particular the drive (33) of a suction system, the power consumption of which is precalculated.

5. Textile machine (1) according to claim 3, characterized in that the working elements which can be actuated by electric motors are assigned to an open-end rotor spinning apparatus (3) and comprise an individual drive (38) for the sliver feed cylinder (37), an individual drive (31) for the sliver opening roller (27), an individual drive (34) for the spinning rotor (40) and an individual drive (44) for the thread take-off device (21).

6. Textile machine (1) according to any of the preceding claims, characterized in that the textile machine (1) is designed as an open-end rotor spinning machine and the yarn count, the fiber type, the twist coefficient, the rotor diameter, the rotor speed, the opening roller speed and / or the spinning vacuum are taken into account as parameters for the characteristic curve fields of the working elements (31, 33, 34, 38, 44).

7. Textile machine (1) according to any of claims 1 to 4, characterized in that the textile machine (1) is designed as a ring spinning machine and the spindle speed, the traveler weight and / or the ring diameter are taken into account as parameters for the characteristic curve fields of the working elements.

8. Textile machine (1) according to any of claims 1 to 4, characterized in that the textile machine (1) is designed as a winding machine and the winding speed is taken into account as a parameter for the characteristic curve fields of the working elements.

9. Textile machine (1) according to any of the preceding claims, characterized in that when determining the power consumption of the electrical power supply unit (24, 32, 35) or of the working element (31, 33, 34, 38, 44), special operating conditions of the textile machine (1) are also taken into account.

10. Textile machine (1) according to claim 6, characterized in that interruptions occurring during the spinning / winding operation of the textile machine (1) are an operating condition to be taken into account.

11. Textile machine (1) according to claim 6, characterized in that the number of workstations (2) that are in operation simultaneously on average during the spinning / winding operation of the textile machine (1) is an operating condition to be taken into account.

12. Method for operating a textile machine (1) comprising a control unit (11), working elements (31, 33, 34, 38, 44) and a power supply device (43) which is connected to a spinning mill power grid (25) and comprises electrical power supply units (24, 32, 35) for supplying the working elements (31, 33, 34, 38, 44), characterized in that the control unit (11) of the textile machine (1) has a control and evaluation device (41) in which the power consumption of a power supply unit (24, 32, 35) or of an individual working element (31, 33, 34, 38, 44) is stored on the basis of characteristic curve fields created from various predeterminable parameters, the control and evaluation device (41) precalculating the power consumption of the electrical power supply unit (24, 32, 35) or of the working element (31, 33, 34, 38, 44) when one or more parameters of the characteristic curve field of a working element (31, 33, 34, 38, 44) is / are adjusted and the control and evaluation device (41) compares the precalculated power consumption with a permissible power consumption and, if the permissible power consumption is exceeded, signals a warning and / or prevents the effective entry of the parameters leading to the exceedance.

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