EP3967797A1 - Textile machine and method for operating same - Google Patents

Abstract

The invention relates to a textile machine (1) with a control unit (11) and working elements (31, 33, 34, 38, 44) and an energy supply device (43) which is connected to a spinning power supply system (25) and has electrical power packs (24 , 32, 35) for supplying the working elements (31, 33, 34, 38, 44, 33).In order to give the operating personnel of the textile machine (1) the opportunity to detect an impending overperformance of a working element (31, 33, 34, 38 , 44) or a power pack (24, 32, 35) of the textile machine (1) at an early stage, i.e. recognizable in advance, the invention provides that the control unit (11) of the textile machine (1) has a control and evaluation device ( 41), in which the respective power consumption of a power supply unit (24, 32, 35) or a working unit (31, 33, 34, 38, 44) is stored on the basis of characteristic curves that were created from various specifiable parameters, the control - And evaluation device (41) so designed is that it precalculates the power consumption of the electrical power pack (24, 32, 35) or the working element (31, 33, 34, 38, 44) if one or more parameters of a family of characteristics of a working element (31, 33, 34, 38, 44) is/are adjusted.

Description

The invention relates to a textile machine with a control unit, working elements and an energy supply device which can be connected to a spinning power supply system and includes electrical power packs for supplying the working elements. The invention also relates to a method for operating the textile machine.

The invention relates in particular to a textile machine that produces cross-wound bobbins and has a large number of work stations, each of which has an open-end rotor spinning device with work elements that can be acted upon by individual motors.

Textile meshes that produce cross-wound bobbins, which have a control unit, in particular a central control unit, and a large number of workstations, each of which is equipped with working elements that can be acted upon by individual motors and whose power supplies are connected to the power supply of a corresponding industrial plant, are known in various embodiments and are described in the patent literature in disclosed in numerous applications.

In the EP 2 562 114 A2 For example, an automatic winder is described which is equipped with a plurality of work stations, which in turn have a large number 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 a later error analysis is possible if necessary. This load information includes, for example, the temperature, the voltage and the electric current, with the electric power being calculated from the voltage and the current and also being stored. If there is an unexpected increase in one or more of these variables, it is concluded that there is an error.

However, the status data of the drives of a textile machine can not only, as in the EP 2 562 114 A2 described, can be used for the subsequent creation of an error analysis, but can also be used elsewhere. Since it is necessary to measure the currents and voltages precisely for correct control of the frequency converters of variable-speed drives in a textile machine, the status data of the drives can also be used sensibly during ongoing operation of the textile machine. Furthermore, in connection with the operation of such textile machines, the optimization of the energy consumption of these textile machines is also becoming increasingly important.

In the DE 10 2006 040 892 A1 it is proposed, for example, to optimize the electrical energy consumption of spinning machines, in the exemplary embodiment of ring spinning machines or roving frames, by recording the energy consumption of the electrical consumers and forming key figures from the energy consumption determined at discrete speeds of the spinning machine and the productions achieved at these speeds . This means that the measured energy consumption is set in relation to the level of production achieved in each case. To record the energy consumption, the energy consumption of energy supply devices, e.g. B. from frequency converters, and automatically converted into characteristic curves in an evaluation device.

Furthermore, in the DE 10 2014 016 785 A1 Using a ring spinning machine, it is described how the total power consumption of the textile machine can be calculated depending on the status data of the electrical drives. For this purpose, the textile machine has a correspondingly designed digital control device. This means that the status data required for calculating the total power consumption are permanently stored in the digital control of this known textile machine, so that only a corresponding software input is required to calculate the total power consumption.

However, the textile machines described above and their control and evaluation devices have the disadvantage that either only the instantaneous or only the past total power consumption of the textile machine can always be determined.

Proceeding from the above-mentioned state of the art, the object of the invention is to develop a device or a method that gives the operator of the textile machine the opportunity to check in advance how the power consumption of a power pack or a working element is developing, if one or more parameters of the family of characteristics of the working body is/are changed. This means that with the device according to the invention, the operating personnel can check in advance whether a change in one or more parameters of the family of characteristics of a working element threatens to exceed the permissible power consumption of the power supply unit or the relevant working element of the textile machine, with the result that the textile machine Overheating is turned off by an "emergency stop" circuit.

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 curves that were created from various specifiable parameters, the control and evaluation device is designed in such a way that it calculates from the family of characteristics how the power consumption of the electrical power supply unit or of the working body develops when one or more parameters of a family of characteristics of a working body is/are adjusted.

Advantageous embodiments of the invention are the subject matter of the dependent claims.

The invention has the particular advantage that the operating personnel can use the control and evaluation device to check in advance in a simple manner how the energy consumption of the power supplies and the working elements would develop if one or more parameters of the family of characteristics of the working elements are changed/ will. This means that the operating personnel can quickly and reliably check, without any negative effect, whether an adjustment of one or more parameters of the characteristic diagram of the working elements may result in an "emergency stop" of the textile machines, because e.g. B. the power consumption of a power supply and / or a working body and / or the total power consumption of the textile machine would increase impermissibly.

For this purpose, the control and evaluation device preferably includes a display that is designed to display the precalculated power consumption.

The control and evaluation device is preferably designed to compare the precalculated 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 by means of the display, not to carry out the entered change in the parameters or to set or enter other parameters.

The textile machine preferably comprises a large number of work stations, the work stations having working elements which can be acted upon by individual motors and whose power consumption is calculated in advance.

In connection with several working elements of a job that can be acted upon by individual motors, it is particularly advantageous to reduce the power consumption of one of the jobs to be calculated in advance of the associated power supply unit, which supplies the working elements of the job that can be acted upon by individual motors. In such a topology, the worksite power supply is often the bottleneck.

The textile machine can also have central working elements whose power consumption is calculated in advance. Such a central working element can, for example, be the drive of an intake system. The suction system can, for example, provide a predetermined negative spinning pressure.

In an advantageous embodiment, the working elements that can be acted upon by an electric motor are assigned to the work station of an open-end rotor spinning device. The working elements that can be acted upon by an electric motor preferably include the individual drive for the sliver draw-in cylinder, the individual drive for the sliver opening roller, the individual drive for the spinning rotor and the individual drive for the thread draw-off device. Accordingly, the yarn count, the fiber type, the twist coefficient, the rotor diameter, the rotor speed, the opening roller speed and/or the negative spinning pressure are taken into account as parameters for the characteristic curves of these working elements. 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 reset. The power consumption of the spinning rotor drive is, for example, primarily dependent on the rotor diameter and the rotor speed, while the power consumption of the opening roller drive z. B. is strongly dependent on the speed of the opening rollers, the fiber type and/or the yarn count. The power consumption of the individual drives also influence the power consumption of a feeding power pack, the power consumption of which is preferably also calculated in advance.

The textile machine according to the invention does not necessarily have to be in the form of an open-end rotor spinning machine, but can also be in the form of a ring spinning machine. The spindle speed, the rotor weight and/or the ring diameter can then be taken into account as parameters for the family of characteristic curves of the working elements.

The textile machine can also be designed as a winding machine. In this case, the winding speed can be taken into account as a parameter for the family of characteristic curves of the working elements.

In a further advantageous embodiment, the control and evaluation device of the textile machine also takes into account special operating states of the textile machine when determining the power consumption of the power supply units or the working elements. This means, such special operating conditions to be taken into account are, for example, interruptions in spinning occurring during the spinning/winding operation of the textile machine and/or the statistical average number of work stations simultaneously in operation during the spinning/winding operation of the textile machine.

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

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, based on characteristic curves that are created from various parameters, the Power consumption of power supplies or individual working bodies is stored, the control and evaluation device calculates how the power consumption of the electrical power supply or the working body develops when one or more parameters of the family of characteristics of a working body is adjusted / are.

The operating personnel can thus quickly, easily and reliably check whether, when one or more parameters of the family of characteristics of a working element are readjusted, 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 individual components is exceeded and an "emergency stop" of the textile machine is imminent.

The invention is explained in more detail below with reference to an exemplary embodiment illustrated in the drawings.

Fig. 1

in perspektivischer Darstellung eine Kreuzspulen herstellenden Textilmaschine, im Ausführungsbeispiel eine Offenend-Rotorspinnmaschine, mit einer Zentralsteuereinheit, die eine erfindungsgemäß ausgebildete Steuer- und Auswerteeinrichtung aufweist,

Fig. 1A

eine schematische Darstellung einer Energieversorgungseinrichtung einer erfindungsgemäßen Textilmaschine,

Fig. 2

in Seitenansicht, stark schematisch, eine Arbeitsstelle der in Figur 1 dargestellten Textilmaschine mit einem im Bereich einer Arbeitsstelle positionierten Serviceaggregat,

Fig. 3

die einzelmotorisch antreibbaren Arbeitsorgane der Offenend-Rotorspinnvorrichtung einer solchen Arbeitsstelle, teilweise im Schnitt,

Fig. 4A

ein erstes Beispiel für ein Kennlinienfeld,

Fig. 4B

ein weiteres Beispiel für ein Kennlinienfeld.

It shows:

1

a perspective view of 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,

Figure 1A

a schematic representation of an energy supply device of a textile machine according to the invention,

2

in side view, highly schematic, a job of in figure 1 Textile machine shown with a service unit positioned in the area of a work station,

3

the single-motor drivable working elements of the open-end rotor spinning device of such a work station, partly in section,

Figure 4A

a first example for a family of characteristics,

Figure 4B

another example of a family of characteristics.

the figure 1 shows a perspective representation of a textile machine producing cross-wound bobbins, in the exemplary embodiment an open-end rotor spinning machine 1, with a central control unit 11, which is equipped with a control and evaluation device 41 designed according to the invention. As is known, such open-end rotor spinning machines 1 have a large number of work stations 2 , each of which is equipped with an open-end rotor spinning device 3 and a winding device 4 , among other things. Such open-end rotor spinning machines 1 are also often supplied by service units 5, which intervene when there is a need for action at a job 2. Such a need for action exists, for example, if a finished cheese 7 has to be exchanged for a fresh empty tube 9 at one of the work stations 2 .

As is known and therefore not explained in detail, in the open-end rotor spinning devices 3 of the open-end rotor spinning machine 1 slivers, which are stored in sliver cans 6, are spun into threads 30, which are then wound up on the winding devices 4 to form cross-wound bobbins 7. The winding devices 4 are for this purpose, as in the figures 2 and 3 shown schematically, each equipped with a creel 8 for rotatably supporting an empty tube 9 or a cross-wound bobbin 7, a winding drum 10 for defined rotation of these elements, and with a yarn traversing device 26.

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

Furthermore, such open-end rotor spinning machines 1 are often equipped with a cheese transport device 14 for disposing of finished cheeses 7 and an empty tube supply device, which essentially consists of an empty tube magazine 15 and tube feed tracks 16 . The service units 5 can be moved on guide rails 17, 18, which are arranged on the open-end rotor spinning machine 1, along the work stations 2 and, if necessary, can be positioned at a requesting work station 2, as is shown in figure 2 is shown schematically.

The open-end rotor spinning machine 1 has an energy supply device 43 for supplying the electrical components with electrical energy. For this purpose, the energy supply device 43 is connected to a power supply system 25 for the spinning mill. For this purpose, the energy supply device 43 comprises a plurality of power supplies which are adapted to the structure and the type of drives used in the open-end rotor spinning machine 1 . In the present exemplary embodiment, the open-end rotor spinning machine 1 includes an internal DC voltage network 45, via which the individual work stations 2 are supplied with electrical energy. The DC voltage network 45 is fed via the central power supply unit 24 from the spinning mill power network 25 . For this purpose, the power pack 24 is designed as a rectifier. To supply the work stations 2, each work station 2 has its own power pack 35, which lowers the voltage of the DC voltage network 45.

The energy supply device 43 has a further central power supply unit 32 which is also fed by the spinning power supply system 25 . The power pack 32 is designed as an inverter. The power pack 32 supplies the motor 33 of a central intake system, not shown, with electrical energy. The suction system provides a vacuum that is required for the open-end rotor spinning devices 3 of the work stations 2 .

the figure 2 shows a highly schematic side view of 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.

The work stations 2 of such open-end rotor spinning machines 1 each have an open-end rotor spinning device 3, with different ones, as in figure 3 shows in more detail, working elements that can be driven by a single motor, and a winding device 4 with a creel 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 by friction.

Such winding devices 4 are usually also equipped with a yarn traversing device 26 which ensures that the yarn 30 produced in the open-end rotor spinning device 3 is wound in intersecting layers onto the winding package mounted in the creel 8 .

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

A cheese transport system 14 and tube feed tracks 16 are also arranged behind or above the work stations 2 .

The service units 5, which are usually of identical design and are mounted on guide rails 17, 18 so that they can be moved along the work stations 2, are used in particular when a cheese/empty tube change is pending 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 which enable the service unit 5 to carry out a proper cheese/empty tube change if necessary and while also making a piecing thread available to the open-end rotor spinning device 3 of the job 2 in question. Such a service unit 5 has, for example, a so-called frame opener (not shown) and an ejector and drive arm (also not shown) that can be placed on the surface of the cheese 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 to the creel 8. Furthermore, such service units 5 are equipped with an auxiliary thread delivery device 22 for providing a piecing thread, a thread feed and thread laying device 23 and a thread transfer device 28 .

Since the mode of operation of such service units 5 is known, further explanations in this regard are dispensed with.

the figure 3 shows 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 without contact in a magnetic bearing, for example, is acted upon by an individual electric motor drive 34 . The individual drive 34 of the spinning rotor 40 is connected directly to the power pack 35 of the work station 2 in order to be supplied with 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. The workplace 2 has its own workplace control device 13, which is also supplied by the power pack 35 of the workplace 2 with electrical energy. 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 .

The control device 13 of the workstation 2 controls the operation of further individual drives of the workstation 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 fiber sliver draw-in cylinder 37 is acted upon 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 .

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 increases, depending on various parameters, e.g. B. the speed, sometimes strongly.

the Figures 4A and 4B use diagrams to show examples of characteristic curves that are stored in the control and evaluation device 41 of the central control unit 11 of the open-end rotor spinning machine 1 and with the help of which 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 determined at certain speeds. Accordingly the electrical power consumption of the power supply unit 35 of the workplace 2 also results from the sum of the electrical power consumption of the individual components to be supplied.

the Figure 4A shows, for example, a family of characteristics that is used to determine the development of the power consumption of the individual drive 34 of an open-end spinning rotor 40. In the exemplary embodiment, the rotor diameter and the rotor speed are taken into account as parameters to be taken into account. The curve 48 shows the development of the power consumption of the individual drive 34 with a spinning rotor 40 whose diameter is relatively small. The curves 49 and 50 correspondingly show the development of the power consumption of the individual drive 34 for spinning rotors with medium-sized and large diameters. The area of the critical power consumption of the spinning rotor drive 34 is also marked with the reference number 51 in the diagram.

the Figure 4B shows the development of the power consumption of the individual drive 31 of a sliver opening roller 27 on the basis of a family of characteristics. The curves 53, 54, 55 show, by way of example, the development of the power consumption of the individual drive 31 with different yarn counts, with curve 53 showing the development with fine yarn counts, curve 54 with medium yarn counts and curve 55 with somewhat coarser yarn counts.

Other parameters influencing the power consumption of an individual drive can also be, for example, the fiber type and/or spinning interruptions that occur during the spinning/winding operation of the textile machine 1 . In these cases, too, 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 in a specific operating state can be determined relatively easily in advance by means of corresponding characteristic curves. <b>Reference List</b> 1 Open-end rotor spinning machine 29 suction nozzle 2 place of work 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 / suction system 6 sliver can 34 Single drive/spinning rotor 7 cone 35 power supply / work station 8th bobbin frame 36 Control line / thread pull-off device 9 empty shell 10 reel drum 37 sliver feed cylinder 11 central control unit 38 Single drive / sliver intake cylinder 12 bus system 13 control facility/workplace 39 Control line / sliver feed cylinder 14 Package transport system 15 empty shell magazine 40 spinning rotor 16 case feed track 41 Control and evaluation device 17 guide rail 42 Control line / opening roller 18 guide rail 43 power supply device 19 Control device/ service unit 44 Individual drive / thread take-off device 20 sleeve gripping device 45 DC network 21 thread take-off device 22 Auxiliary thread delivery device 48 rotor diameter / small 23 Thread feed and thread laying device 49 Rotor diameter / medium 50 rotor diameter / large 24 central power supply 51 critical ceiling 25 spinning power grid 26 thread traversing device 53 Yarn count / fine 27 Sliver opening roller 54 Yarn count / medium 28 yarn transfer device 55 Yarn count / thick

Claims (13)

Textile machine (1) with a control unit (11), working elements (31, 34, 38, 44) and an energy supply device (43) which can be connected to a spinning power supply system (25) and electrical power supply units (24, 32, 35) for supply of the working organs (31, 33, 34, 38, 44),
characterized,
that the control unit (11) of the textile machine (1) has a control and evaluation device (41) in which the respective power consumption of a power supply unit (24, 32, 35) or a working element is measured on the basis of characteristic curves that were created from various specifiable parameters (31, 33, 34, 38, 44), the control and evaluation device (41) being designed in such a way that it measures the power consumption of the electrical power pack (24, 32, 35) or the working element (31, 33, 34 , 38, 44) is precalculated if one or more parameters of a family of characteristics of the working element (31, 33, 34, 38, 44) is/are adjusted. 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. Textile machine (1) according to Claim 1 or 2, characterized 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 the effective to prevent entry of the parameters leading to the violation. Textile machine (1) according to one of the preceding claims, characterized in that the textile machine (1) comprises a large number of work stations (2), the work stations (2) having working elements (31, 33, 34, 38, 44) which can be acted upon by individual motors, whose power consumption is calculated in advance. Textile machine (1) according to one 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 calculated in advance. Textile machine (1) according to Claim 4, characterized in that the working elements which can be acted upon by an electric motor are assigned to an open-end rotor spinning device (3) and have an individual drive (38) for the sliver draw-in cylinder (37), an individual drive (31) for the sliver opening roller (27 ), A single drive (34) for the spinning rotor (40) and a single drive (44) for the yarn take-off device (21). Textile machine (1) according to one of the preceding claims, characterized in that the textile machine (1) is designed as an open-end rotor spinning machine and as parameters for the characteristic curves of the working elements (31, 33, 34, 38, 44) the yarn count, the fiber type, the rotation coefficient, the rotor diameter, the rotor speed, the opening roller speed and/or the negative spinning pressure are taken into account. Textile machine (1) according to one of Claims 1 to 5, characterized in that the textile machine (1) is designed as a ring spinning machine and the spindle speed, the rotor weight and/or the ring diameter are taken into account as parameters for the characteristic curves of the working elements. Textile machine (1) according to one of Claims 1 to 5, 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 curves of the working elements. Textile machine (1) according to one of the preceding claims, characterized in that when determining the power consumption of the electrical power pack (24, 32, 35) or of the working element (31, 33, 34, 38, 44) special operating states of the textile machine (1st ) are taken into account. Textile machine (1) according to Claim 7, characterized in that an operating state to be taken into account during the spinning/winding operation of the textile machine (1) is interruptions. Textile machine (1) according to Claim 7, characterized in that an operating state to be taken into account is the number of workstations (2) simultaneously in operation during the spinning/winding operation of the textile machine (1) on a statistical average. Method for operating a textile machine (1) with a control unit (11), working elements (31, 33, 34, 38, 44) and an energy supply device (43) which a spinning power supply system (25) is connected and includes electrical power packs (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 pack (24, 32, 35) or an individual working element (31, 33, 34, 38, 44 ) is stored, with the control and evaluation device (41) precalculating the power consumption of the electrical power pack (24, 32, 35) or of the working element (31, 33, 34, 38, 44) if one or more parameters of the family of characteristics of a working element (31, 33, 34, 38, 44) is/are adjusted.

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