CN114182400A

CN114182400A - Textile machine and method for operating such a textile machine

Info

Publication number: CN114182400A
Application number: CN202111075156.2A
Authority: CN
Inventors: 德特勒夫·舍尔特
Original assignee: Saurer Spinning Solutions & CoKg GmbH
Current assignee: Saurer Spinning Solutions & CoKg GmbH
Priority date: 2020-09-15
Filing date: 2021-09-14
Publication date: 2022-03-15
Anticipated expiration: 2041-09-14
Also published as: CN114182400B; EP3967797A1; DE102020123977A1

Abstract

The invention relates to a textile machine and a method for operating such a textile machine, the textile machine (1) having a control unit (11), a plurality of working mechanisms (31,33,34,38,44) and a power supply device (43) which can be connected to a spinning mill power supply network (25) and which comprises a power supply (24,32,35) for supplying power to the working mechanisms. In order to enable an operator of the textile machine (1) to detect in advance, i.e. to detect in advance that a working mechanism or a power supply of the textile machine (1) is about to exceed power, a 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 or a working mechanism is stored as a function of a characteristic map which has been created from various predefinable parameters, the control and evaluation device (41) being designed such that it calculates in advance the power consumption of the power supply or of the working mechanism when one or more parameters of the characteristic map of the working mechanism are adjusted.

Description

Textile machine and method for operating such a textile machine

Technical Field

The invention relates to a textile machine having a control unit, a plurality of working mechanisms and a power supply device which can be connected to a spinning mill power grid and which comprises a power supply for supplying power to the working mechanisms. The invention also relates to a method for operating a textile machine.

The invention relates in particular to a textile machine for producing cross-wound bobbins, having a plurality of workstations, each having a free-end rotor spinning device with a working mechanism which can be subjected to the action of a separate motor.

Background

Various embodiments of textile machines for producing cross-wound bobbins are known and disclosed in the patent literature of numerous applications, having a control unit and in particular a central control unit, and a plurality of workstations, each equipped with a working mechanism capable of withstanding the action of a separate motor, the power supply of which is connected to the power grid of the respective industrial plant.

For example, EP2562114a2 describes an automatic winder which is equipped with a plurality of work stations which in turn have a plurality of electrical components and drive devices. The automatic winder is also provided with a control and evaluation device, in which the load information of the components is obtained and stored, so that later fault analysis can be carried out as required. The load information includes, for example, temperature, voltage and current, wherein the electrical power is calculated from the voltage and current and is also stored. If an unexpected increase in one or more of these parameters occurs, it is concluded therefrom that a fault exists.

However, the status data of the drive devices of the textile machine can be used not only for the subsequent fault analysis as described in EP2562114a2, but also for other purposes. Since precise measurement of the current and voltage is required for the frequency converter which controls the rotational speed variable drive of the textile machine in accordance with the specification, the status data of the drive can also be used meaningfully during continuous operation of the textile machine. Furthermore, regarding the operation of such textile machines, textile machine energy consumption optimization is also becoming increasingly important.

DE102006040892a1 proposes, for example, optimizing the electrical consumption of a spinning mill system, in the exemplary embodiment a ring spinning machine or a flyer roving machine, in such a way that the electrical consumption of these electrical consumption loads is recorded and formed from the energy consumption determined at the time and the output obtained at the rotational speed of the spinning mill system in isolation. This means that the determination energy consumption is correlated with the size of the yield respectively obtained. In order to determine the energy consumption, the energy consumption of the power supply, for example a frequency converter, is subtracted from the drive, for example a motor whose energy consumption is related to the rotational speed, and is automatically converted into a characteristic diagram (kennlienfeld) in an evaluation device.

Furthermore, the incorporation of a ring spinning machine in DE102014016785a1 describes how the total power consumption of the textile machine can be calculated from the status data of the electric drive. For this purpose, the textile machine has a correspondingly designed digital control device. In other words, the digital control device of the known textile machine permanently stores the state data required for calculating the total power consumption, so that the total power consumption can be calculated by means of corresponding software inputs.

However, a disadvantage of the textile machine described above or of its control and evaluation device is that only the current or past total power consumption of the textile machine can always be determined.

Disclosure of Invention

In view of the prior art described above, the invention is based on the object of developing a device or a method which allows an operator of a textile machine to already check in advance how the power supply or the power consumption of the operating means changes when one or more parameters of a characteristic map of the operating means is changed. That is, with the device according to the invention, the operator can already check beforehand whether, in the event of a change in one or more parameters of the characteristic map of the working mechanism, the power supply of the textile machine or the permissible power consumption of the relevant working mechanism is exceeded and the textile machine is switched off by an "emergency stop" cut-in due to overheating.

According to the invention, this object is achieved 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 or of an operating element is stored as a function of a characteristic map that has been created from various predefinable parameters, wherein the control and evaluation device is designed such that it calculates from the characteristic map how the power consumption of the power supply or of the operating element develops when one or more parameters of the characteristic map of the operating element are adjusted.

The invention has the advantage, in particular, that an operator can check beforehand in a simple manner using the control and evaluation device how the energy consumption of the working mechanism and the power supply will develop when one or more parameters in the characteristic map of the working mechanism change. That is, the operator can check whether an "emergency stop" cut-in of the textile machine is imminent during the adjustment of one or more parameters of the characteristic map of the working mechanism, quickly and reliably, without any negative effect, since, for example, the power supply and/or the power consumption of the working mechanism and/or the overall power consumption of the textile machine would increase impermissibly.

To this end, the control and evaluation means preferably comprise a display designed to display the pre-calculated power consumption.

The control and evaluation means are preferably designed to compare the pre-calculated power consumption with the allowed power consumption and to signal an alarm if the allowed power consumption is exceeded. Within this alarm range, the operator may be asked, for example by means of a display, not to perform the entered parameter change or adjustment or to enter other parameters.

The textile machine preferably comprises a plurality of workstations, wherein the workstations have operating means which can be acted upon by individual motors and whose power consumption is pre-calculated.

In connection with a plurality of working means of a work station that can be subjected to the action of individual motors, it is particularly advantageous to calculate in advance the power consumption of the power supply assigned to the work station that supplies the working means of the work station that can be subjected to the action of individual motors. A station that can be acted upon by a single motor. In such topologies, the power supply for the workstation is typically a bottleneck.

The textile machine may also be provided with a central operating mechanism whose power consumption is pre-calculated. Such a central operating means may be, for example, the drive of the suction device. For example, the suction device can provide a predetermined spinning underpressure.

In an advantageous embodiment, the working means which can be subjected to the action of an electric motor are assigned to the working stations of the open-end rotor spinning device. The working mechanisms which can be acted upon by the electric motor preferably comprise a separate drive for the fibre sliver feed roller, a separate drive for the fibre sliver opening roller, a separate drive for the spinning rotor and a separate drive for the yarn unwinding device. Accordingly, the yarn count (Garnfeinheit), the fiber type, the twist multiplier (Drehungsbeiwert), the rotor diameter, the rotor speed, the opening roller speed and/or the spinning underpressure are taken into account as parameters of the characteristic curve family of these operating mechanisms. That is, the power consumption of the operating mechanism is characterized by one or more of the above parameters, depending on the operating mechanism to be readjusted. For example, the power consumption of the spinning rotor drive depends mainly on the rotor diameter and the rotor speed, while the power consumption of the opening roller drive depends mainly on the opening roller speed, the fiber type and/or the yarn count, for example. The power consumption of the individual drives also influences the power consumption of the feed power supply, which power consumption is preferably also pre-calculated.

The textile machine of 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. As a parameter of the characteristic curve family of the operating means, the spindle rotational speed, the weight of the wire and/or the diameter of the ring can then be taken into account.

The textile machine can also be designed as a winding machine. The winding speed can be taken into account in this case as a parameter of the characteristic curve family of the operating mechanism.

In a further advantageous embodiment, the control and evaluation device of the textile machine also takes into account the specific operating state of the textile machine when determining the power supply or the power consumption of the operating means. The particular operating state to be taken into account is, for example, a spinning interruption occurring during a spinning/winding operation of the textile machine and/or the number of workstations which are simultaneously active on a statistical average during a spinning/winding operation of the textile machine.

For this particular operating state, the power consumption of a power supply or of an operating mechanism is also determined, wherein the control and evaluation device of the textile machine operates, for example, with empirical values. In other words, when calculating the total power consumption of the textile machine or the power consumption of the power supply, the stored power consumption of an operating means is taken into account as an empirical value when said operating state EIN is present for this operating means.

The method according to the invention is used in a textile machine, characterized 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 or of an operating element is stored as a function of a characteristic map that has been created from various predeterminable parameters, wherein the control and evaluation device is designed such that it calculates how the power consumption of the power supply or of the operating element develops when one or more parameters of the characteristic map of the operating element are adjusted.

The operator can thus quickly, easily and reliably check whether, when readjusting one or more parameters of a characteristic map of a working mechanism, there is an increase in the power consumption of a power supply or of a working mechanism and/or the overall power consumption of the textile machine to a point at which the permissible power consumption of individual components is exceeded and the textile machine is exposed to the risk of "emergency stop" cut-in.

Drawings

The invention will be explained in more detail below on the basis of an embodiment as shown in the drawing, in which:

FIG. 1 shows a perspective view of a textile machine for producing cross-wound bobbins, in the exemplary embodiment an open-end rotor spinning machine, with a central control unit comprising a control and evaluation device designed according to the invention,

figure 1A shows a schematic view of the power supply device of the textile machine of the invention,

fig. 2 shows very schematically in a side view a workstation of the textile machine shown in fig. 1, with a service aggregate located in one workstation region,

figure 3 shows in a partial cross-section the working mechanism of such a station's free-end rotor spinning device which can be driven by a single motor,

FIG. 4A shows a first example of a characteristic diagram, an

Fig. 4B shows another example of a characteristic map.

List of reference numerals

1 open-end rotor spinning machine

2 station

3 free end rotor spinning device

4 winding device

5 service unit

6 spinning can

7 Cross-wound bobbin

8 bobbin creel

9 hollow bobbin

10 winding drum

11 central control unit

12 bus system

13 control device/station

14 cross-wound bobbin conveying system

15 empty bobbin storage

16 bobbin supplying rail

17 guide rail

18 guide rail

19 control device/service unit

20 bobbin clamping mechanism

21 yarn unwinding device

22 auxiliary yarn supply device

23 yarn laying device

24 central power supply

25 spinning mill power grid

26 yarn traversing device

27 fiber sliver opening roller

28 yarn transfer device

29 suction nozzle

30 yarn

31 individual drive/opening roller

32 power supply/suction device

33 Motor/suction device

34 Single drive device/spinning rotor

35 power supply/station

36 control wire/yarn unwinding device

37 fiber sliver feeding roller

38 individual drive/sliver feed roller

39 control line/fibre sliver feed roller

40 spinning rotor

41 control and evaluation device

42 control line/opening roller

43 power supply device

44 individual drive/yarn unwinding device

45 D.C. voltage net

48 rotor diameter/small

49 rotor diameter/Medium

50 rotor diameter/big

Critical upper limit of 51

53 yarn count/fine

54 yarn count/medium

55 yarn count/coarse

Detailed Description

Fig. 1 shows a perspective view of a textile machine for producing cross-wound bobbins, in the exemplary embodiment a free-end rotor spinning machine 1, with a central control unit 11 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 plurality of work stations 2, each of which is equipped with an open-end rotor spinning device 3 and a winding device 4. Such open-end rotor spinning machines 1 are also normally served by a service aggregate 5, which intervenes when action is required at a work station 2. This action requirement exists, for example, when a completed cross-wound bobbin 7 has to be replaced by a new empty bobbin 9 at one of the stations 2.

As is known and therefore not described in greater detail, in the open-end rotor spinning device 3 of the open-end rotor spinning machine 1, the fiber sliver stored in the spinning can 6 is spun into a yarn 30, which is subsequently wound on the winding device 4 to form a cross-wound bobbin 7. For this purpose, as is shown schematically in fig. 2 and 3, the winding device 4 is equipped with a creel 8 for rotatably holding an empty bobbin 9 or a cross-wound bobbin 7, a winding drum 10 for the limited rotation of these components, and a traversing device 26, respectively.

The open-end rotor spinning machine 1 shown also has, as explained 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 here via a bus system 12 to the control device 13 of the workstation 2 and to the control device 19 of the service aggregate 5.

Furthermore, such open-end rotor spinning machines 1 are usually equipped with a cross-wound bobbin transport device 14 for discharging the finished cross-wound bobbins 7 and an empty bobbin supply device which is essentially composed of an empty bobbin magazine 15 and a bobbin supply rail 16. The service aggregate 5 can be moved along the stations 2 on

rails

17, 18 arranged on or at the free-end rotor spinning machine 1 and can be positioned as required at the requesting station 2, as is schematically shown in fig. 2.

For supplying the electrical components, the open-end rotor spinning machine 1 has a power supply device 43. The power supply device 43 is connected to the spinning mill power grid 25 for this purpose. The power supply device 43 comprises a plurality of power sources for this purpose, which are adapted to the design and type of drive device used by the open-end rotor spinning machine 1. In the present embodiment, the open-end rotor spinning machine 1 comprises an internal direct voltage network 45, by means of which the individual stations 2 are supplied with electrical energy. The dc voltage network 45 is supplied by the spinning mill power network 25 via the central power supply 24. The power supply 24 is designed as a rectifier for this purpose. For supplying the stations 2, each station 2 has its own power supply 35 which reduces the voltage of the dc voltage network 45.

The power supply device 43 has a further central power supply 32, which is also supplied by the spinning mill power supply network 25. The power supply 32 is designed as an inverter. The power supply 32 supplies electrical energy to a motor 33 of a central suction device, not shown in detail. The underpressure provided by the suction device is required by the free-end rotor spinning device 3 of the station 2.

Fig. 2 shows very schematically in a side view the working position 2 of the open-end rotor spinning machine 1 together with the service aggregate 5 located upstream of the working position 2.

The workstations 2 of such open-end rotor spinning machines 1 each have a spinning device 3 (with various operating mechanisms which can be driven by individual motors, as shown in more detail in fig. 3) and a winding device 4 with a creel 8 in which a cross-wound bobbin 7 or an empty bobbin 9 is rotatably mounted. During the spinning/winding operation, the cross-wound bobbin 7 or the empty bobbin 9 rests on a winding drum 10, which drives the cross-wound bobbin 7 or the empty bobbin 9 in a friction-fit manner.

Such a winding device 4 is usually also equipped with a yarn traversing device 26, which ensures that the yarn 30 produced in the free-end rotor spinning device 3 is wound in a cross-layer manner onto a winding package mounted in the creel 8.

As can also be seen, each station 2 also has its own control device 13, which is connected to the central control unit 11 of the spinning machine 1 via the bus system 12, a yarn unwinding device 21 which can be driven by a separate motor, and a rotatably mounted suction nozzle 29 of the station itself.

Furthermore, a cross-wound bobbin transport system 14 and a bobbin supply rail 16 are arranged behind or above the station 2.

The service unit 5, which is usually of identical design and is mounted on

rails

17, 18 so as to be movable along the stations 2, is used in particular when waiting for a cross-wound bobbin/empty bobbin change on one of the stations 2. In addition to the 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 aggregate 5 also has various operating devices which allow the service aggregate 5 to carry out a defined cross-wound bobbin/empty bobbin exchange as required and at the same time also supply the open-end rotor spinning device 3 of the respective station 2 with piecing yarn. Such a service unit 5 is provided, for example, with a so-called creel opening mechanism (not shown) and a drive arm (auto β -und elevator) which can be pressed onto the surface of the cross-wound bobbin 7, also not shown. The servicing unit 5 also has a bobbin holding device 20, by means of which empty bobbins 9 brought into the region of the stations 2 by means of the bobbin supply rail 16 can be taken up and transferred into the creel 8. Furthermore, such a service unit 5 is equipped with an auxiliary thread supply 22 for supplying piecing threads, a thread laying device 23 and a thread transfer device 28.

Since the mode of operation of such a service unit 5 is known, further description thereof is dispensed with.

Fig. 3 shows the open-end rotor spinning device 3 together with the associated yarn unwinding device 21 on a larger scale in a partial sectional view. As shown in the figure, each of the various working mechanisms of the free-end rotor spinning device 3 and the yarn unwinding device 21 is driven by a separate motor. That is, the spinning rotor 40, which is mounted in a non-contacting manner in a magnetic bearing, is subjected to the action of the separate motor drive 34. The individual drive 34 of the spinning rotor 40 is directly connected to the power source 35 of the station 2 for supplying power. The individual drive 34 of the spinning rotor 40 is provided with its own control device (not shown) which drives the spinning rotor 40 as required. The station 2 is provided with a control device 13 of the station itself, which is also powered by the power supply 35 of the 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.

The control device 13 of the station 2 controls the operation of the other individual drives of the station 2. This comprises a separate drive 31 of the fibre sliver opening roller 27, which is connected to the control device 13 via a control line 42. Accordingly, the individual drives 38 of the sliver feed rollers 37 are acted upon by control lines 39. The yarn unwinding device 21 is driven by a separate drive device 44, which in turn is connected to the control device 13 via a control line 36.

As described above, the motor-

independent driving devices

31,34,38, and 44 of the various operating mechanisms of the free-end rotor spinning device 3 can be driven at a predetermined rotational speed as necessary. The power consumption of such drives sometimes increases significantly depending on various parameters, such as the rotational speed.

Fig. 4A and 4B show, by means of diagrams, examples of characteristic maps stored in the control and evaluation device 41 of the central control unit 11 of the open-end rotor spinning machine 1, by means of which the electrical power consumption of the individual drives 31,34,38,44 of the different drive sections of the open-end rotor spinning device 3 at a specific rotational speed can be easily ascertained. Accordingly, the electrical power consumption of power supply 35 of station 2 is also derived from the sum of the electrical power consumptions of the individual components to be supplied.

Fig. 4A shows, for example, a characteristic diagram for determining a change in the power consumption of the individual drive 34 of the open-end spinning rotor 40. As parameters to be taken into account, the rotor diameter and the rotor speed are taken into account in the examples. The curve 48 represents the variation of the power consumption of the individual drive 34 of the spinning rotor 40, the diameter of the spinning rotor 40 being relatively small. The

curves

49 and 50 respectively represent the variation of the power consumption of the individual drives 34 in the case of spinning rotors with medium or large diameters. The critical power consumption region of the spinning rotor drive 34 is also indicated in the diagram by reference numeral 51.

Fig. 4B shows, in conjunction with a characteristic diagram, the change in the power consumption of the individual drive 31 of the fiber sliver opening roller 27. In connection with the change in the power consumption of the individual drive 31 of the fiber sliver opener 27, the opening roller speed is taken into account, for example, in terms of the yarn count.

Curves

53, 54, 55 show exemplary variations in the power consumption of individual drives 31 with different yarn counts, curve 53 showing a variation in the spun yarn count, curve 54 showing a variation in the medium yarn count and curve 55 showing a variation in the roving count.

Other parameters influencing the power consumption of the individual drive can also be, for example, the type of fiber and/or the spinning interruption occurring during the spinning/winding operation of the textile machine 1. In these cases, a comparatively precise determination of the power consumption of the individual drives of the open-end rotor spinning device 3 or of the overall power consumption of the textile machine 1 in certain operating states can also be carried out in a comparatively simple manner by means of corresponding characteristic maps.

Claims

1. Textile machine (1), which textile machine (1) has a control unit (11), a plurality of operating means (31,34,38,44) and a power supply device (43), which can be connected to a spinning mill power grid (25) and which comprises a power supply (24,32,35) for supplying the operating means (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 respective power consumption of one power supply (24,32,35) or of one operating means (31,33,34,38,44) is stored as a function of a characteristic family that has been created from various predefinable parameters, wherein the control and evaluation device (41) is designed such that it calculates the power supply (24) in advance when one or more parameters of the characteristic family of the operating means (31,33,34,38,44) are adjusted, 32,35) or the operating means (31,33,34,38, 44).

2. Textile machine (1) according to claim 1, characterized in that the control and evaluation device (41) comprises a display designed for displaying a pre-calculated power consumption.

3. Textile machine (1) according to claim 1 or 2, characterized in that the control and evaluation device (41) is designed for comparing the pre-calculated power consumption with an allowed power consumption and for signaling an alarm and/or for preventing a valid input of the parameter causing the exceeding if the allowed power consumption is exceeded.

4. Textile machine (1) according to one of the preceding claims, characterized in that the textile machine (1) comprises a plurality of workstations (2), wherein the workstations (2) have working mechanisms (31,33,34,38,44) which can be subjected to individual motor actions, the power consumption of the working mechanisms (31,33,34,38,44) being pre-calculated.

5. Textile machine (1) according to one of the preceding claims, characterized in that the textile machine (1) has a drive device (33) of a central operating mechanism, in particular of a suction device, the power consumption of which is pre-calculated.

6. Textile machine (1) according to claim 4, characterized in that the operating means which can be subjected to the action of an electric motor are assigned to the open-end rotor spinning device (3) and comprise a separate drive (38) for the fibre sliver feed roller (37), a separate drive (31) for the fibre sliver opening roller (27), a separate drive (34) for the spinning rotor (40) and a separate drive (44) for the yarn unwinding device (21).

7. 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 the yarn count, the fiber type, the twist factor, the rotor diameter, the rotor speed, the opening roller speed and/or the spinning underpressure are taken into account as parameters of the characteristic curve family for the working means (31,33,34,38, 44).

8. 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 spindle rotational speed, bead ring weight and/or ring diameter are taken into account as parameters of the characteristic curve family for the working mechanisms.

9. 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 of the characteristic curve family for the working mechanism.

10. Textile machine (1) according to one of the preceding claims, characterized in that a special operating state of the textile machine (1) is also taken into account when determining the power consumption of the power supply (24,32,35) or the power consumption of the operating mechanism (31,33,34,38, 44).

11. Textile machine (1) according to claim 7, characterized in that the working condition to be considered is an interruption occurring during a spinning/winding operation of the textile machine (1).

12. Textile machine (1) according to claim 7, characterized in that the working state to be considered is the number of the workstations (2) which are simultaneously in operation according to a statistical average during a spinning/winding operation of the textile machine (1).

13. Method for operating a textile machine (1) having a control unit (11), a plurality of operating means (31,33,34,38,44) and a power supply device (43) which can be connected to a spinning mill power supply network (25) and which comprises a power supply (24,32,35) for supplying the operating means (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 respective power consumption of one power supply (24,32,35) or of one operating means (31,33,34,38,44) is stored as a function of a characteristic diagram created from various predefinable parameters, wherein the control and evaluation device (41) is designed such that it calculates the power supply (24) in advance when one or more parameters of the characteristic diagram of the operating means (31,33,34,38,44) are adjusted, 32,35) or the operating means (31,33,34,38, 44).