SPINNING MACHINE AND PROCESS

Description

[0001] The invention relates to a textile machine. The invention further relates to a method for applying a vacuum. The invention further relates to a control device.

[0002] Textile machines are known in the prior art. These machines may include a spinning device for producing a thread at a workstation that is subjected to a vacuum. They may also include at least one suction nozzle that is subjected to a vacuum to pick up an upper thread from a bobbin, for example, after a thread break.

[0003] EP 3 901 336 A1 describes such a textile machine in the form of a spinning machine. This machine has a plurality of workstations arranged side by side, each of which has a spinning device for producing a thread that can be pressurized with a vacuum, as well as a suction nozzle for locating a thread end on a bobbin that can also be pressurized with a vacuum. The thread from such a thread end can be referred to as the top thread. The textile machine has at least one first vacuum system. This system has at least one first vacuum channel extending along the working stations of the spinning machine and at least one first vacuum source. The spinning devices of the working stations are connected to the first vacuum system. The spinning machine has at least one second vacuum system.This system has at least one second vacuum channel extending along the working areas of the spinning machine, as well as at least one second vacuum source. The suction nozzles of at least a first subset of the working areas, preferably all working areas, are connected to the second vacuum system. The first and second vacuum systems are pneumatically completely separated from each other.

[0004] Spinning machines with a vacuum control system according to the state of the art are also known from US 3,842,579 A and US 3,859,779 A.

[0005] This allows for separate control of the spinning vacuum and the vacuum for upper thread handling. Each of the two functional groups, "spinning" and "upper thread handling," can thus be assigned an optimized vacuum independently. The vacuum performance is determined by the respective vacuum system. The design and dimensions of the vacuum system are predetermined, which can have limiting effects.

[0006] The object of the invention is therefore to make the design of a textile machine more flexible. The object of the invention is to further improve the vacuum control. The object of the invention is to make the vacuum control more flexible.

[0007] The problem is solved by a textile machine having the features of claim 1. Furthermore, the problem is solved by a method having the features of claim 9. The problem is further solved by a control device having the features of claim 10.

[0008] Advantageous embodiments of the invention are the subject of the dependent claims.

[0009] According to one aspect, the problem can be solved by a textile machine according to claim 1.

[0010] A textile machine can have at least one first vacuum point for producing a thread. The textile machine can have at least one second vacuum point for drawing in the thread. The textile machine can have at least one first vacuum system. This system can be designed and arranged to be fluidically connected to the first vacuum point. Alternatively, the first vacuum system can be designed and arranged to be fluidically connected to the first vacuum point. The textile machine can have at least one second vacuum system. This system can be designed and arranged to be fluidically connected to the second vacuum point. Alternatively, the second vacuum system can be designed and arranged to be fluidically connected to the second vacuum point.The vacuum systems can each have at least one vacuum source chamber, in particular a fan chamber, a filter chamber, and a vacuum channel. A connection between the first vacuum system and the second vacuum system can be configured such that the connection can be selectively established or interrupted. This allows for a more flexible design of the textile machine, as the vacuum systems can be adapted to accommodate the different vacuum levels that arise from a fluidic connection between the first vacuum system at the first vacuum point and the second vacuum system at the second vacuum point. This allows a first vacuum level in the first vacuum system, or at the first vacuum point, to be related to a vacuum level in the second vacuum system, or at the second vacuum point.In particular, the negative pressure levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in negative pressure allocation.

[0011] A textile machine can be, in particular, a spinning machine, and more specifically, a rotor spinning machine. It can be provided that a spinning device is included as a working element, which has one of the vacuum points. Such a vacuum point can be provided in a spinning device. A spinning device can be designed to spin a thread from pre-loaded fibers.

[0012] A textile machine can, in particular, have at least one work station. Alternatively, a textile machine can have a multitude of work stations. A work station is specifically designed to spin a thread from fibers in a spinning device, particularly as described elsewhere. Furthermore, a work station can include a bobbin-making device, particularly as described elsewhere, for winding a thread onto a bobbin.

[0013] A vacuum system can be designed to meet the suction fluid requirements of one or more workstations or vacuum points located within them. This system can vary depending on the requirements of the workstation or vacuum point. To meet these varying vacuum requirements, different vacuum systems can be provided. Textile machine-integrated suction air systems with a vacuum source can be used. This vacuum source can include a drive motor. This motor can be connected to a frequency converter and its speed can be precisely adjusted to set a vacuum level. This allows the vacuum requirement, particularly the suction air requirement, of the textile machine or the vacuum points to be adjusted within certain limits by adjusting the speed of the drive motor.

[0014] For example, the drive motor initially runs at a speed at which the vacuum in the vacuum system can reach a certain minimum level, ensuring that the proper functioning of a working element to which a vacuum point is assigned is not compromised.

[0015] Alternatively, a control device can be provided, as described elsewhere, to control a drive motor.

[0016] A fluidic connection can be configured, in particular, to establish a fluid flow between a vacuum system and a vacuum point. The fluid flow is defined, in particular, as flowing from the vacuum point to a vacuum source of the vacuum system, thus following a particle flow (e.g., of air particles). A vacuum system can be provided for establishing a fluidic connection between the vacuum source and the vacuum point. The vacuum system can include a vacuum channel. Alternatively or additionally, the vacuum system can include at least one collection device for thread and / or fiber remnants. This collection device can include a filter system. Alternatively or additionally, the collection device can include a storage device, such as a container for receiving the corresponding thread and / or fiber remnants.

[0017] A connection between the first and second vacuum systems can, in particular, be a bypass connection. This connection can be established at least temporarily. In other words, a cross-connection can be established between the first and second vacuum systems to fluidically link the vacuum systems. This fluidic connection serves, in particular, to compensate for a limited installed capacity (i.e., the achievable vacuum level) of one (first or second) vacuum system, especially by selecting another (second or first) vacuum system that is limited in size (i.e., the achievable vacuum level) but appropriately adapted to the requirements.In other words, a vacuum level can be created at various (first and second) vacuum points through the fluidic connection of these vacuum points to vacuum sources via the two vacuum systems. The sizes of the two vacuum systems can also be adapted to each other in such a way as to meet the overall requirement for the different vacuum levels at the various (first and second) vacuum points via the fluidic connection.

[0018] It can be provided that a spool of spun thread is formed in a spool-making device, particularly a cross-spool-making device. A working element can be provided on the spool-making device to receive a thread, particularly an upper thread, or an end of a thread, particularly an end of an upper thread, from a spool to be produced, particularly a cross-spool. The second vacuum point can be associated with, or arranged on or in, the working element.

[0019] The bobbin being produced is also called a winding bobbin. Since the winding bobbin is often, but not necessarily, located in the upper part of a work area, the thread wound onto or retrieved from the winding bobbin is called the top thread.

[0020] The thread retrieved from the bobbin is needed to restart a thread spinning process after a thread break or cleaning cut (referred to as re-spinning).

[0021] From one perspective, the first point of negative pressure for yarn production can be a spinning device, particularly a spinneret. This allows a vacuum to be applied to spin yarn. The negative pressure serves primarily to attach fibers to the forming yarn. The negative pressure level at the spinning device can be supplemented and / or compensated for by a negative pressure level from a second vacuum system. This allows for further improvement and, in particular, greater flexibility in the application of negative pressure.

[0022] In other embodiments, or in other words, the spinning device, in particular the spinneret, can have the first vacuum point. This vacuum point can be, in particular, a structural feature within the spinning device. It can be, in particular, a vacuum port and / or a vacuum nozzle and / or a vacuum connection, such as a fluid outlet.

[0023] A suction nozzle can be specifically designed to create a suction fluid flow, particularly a suction air flow. In a rotor spinning machine, the spinning device can have a rotor housing in which a suction air flow can be created. A so-called spinning vacuum can be generated in such a rotor housing. This ensures, for example during spinning, that the individual fibers combed from a feed fiber tape by a disentanglement roller are fed into the spinning rotor via a fiber guide channel, where they are twisted into a thread.

[0024] From one perspective, the second vacuum point for drawing in the thread can have at least one suction nozzle for picking up a thread from a take-up spool. The vacuum serves specifically to pick up the thread from the take-up spool. This allows the vacuum level at the suction nozzle to be supplemented and / or compensated by the vacuum level of the first vacuum system. This further improves the vacuum distribution and, in particular, makes it more flexible.

[0025] Alternatively or additionally, the second vacuum point for drawing in the thread can have at least one thread storage nozzle for receiving a thread. The vacuum serves, in particular, to draw a thread into a thread nozzle, especially a pneumatic thread nozzle, thereby holding the thread under tension for re-spinning. This allows the vacuum level at the thread storage nozzle to be supplemented and / or compensated by a vacuum level from the first vacuum system. This further improves the vacuum distribution and, in particular, makes it more flexible.

[0026] Alternatively or additionally, the second vacuum point for suctioning the thread can be at least one working element capable of being pressurized with vacuum. The vacuum here serves primarily to distribute it to other working elements. This is not a vacuum point as described elsewhere in relation to the first vacuum point. The vacuum level at the working element can be supplemented and / or compensated by the vacuum level of the first vacuum system. This allows for further improvement and, in particular, greater flexibility in the distribution of vacuum.

[0027] An example of such a working element is, in particular, a vacuum nozzle for thread splicing in a thread splicing device. Thread splicing can be designed, in particular, to unravel and "fray" a thread end, especially of an upper thread, in order to restart the spinning process. A vacuum can create a fluid flow, in particular a suction air flow. This fluid flow can be designed to interact with the thread end, causing the spun thread to begin unraveling from the end. This loosens the winding of the fibers and creates attachment points or areas to allow further fibers to be attached for spinning.

[0028] Here and elsewhere, the term "spool" or "winding spool" can refer specifically to a cross-wound spool. Cross-wound spools are formed, in particular, by winding a thread, which has been formed from a spinning device, onto a spool sleeve or onto a partially formed cross-wound spool via a thread-changing device. The configuration of a cross-wound spool allows for a particularly stable winding of the spool, since the thread, due to the way it is wound, holds itself in place on the cross-wound spool.

[0029] From one perspective, the (fluidic) connection between the first vacuum system and the second vacuum system can be located at least in a vacuum source chamber, in particular a fan chamber. This allows a first vacuum level in the first vacuum system or at the second vacuum point to be related to a vacuum level in the second vacuum system or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in vacuum distribution.

[0030] A first vacuum source chamber, in particular a first fan chamber, can be provided, especially in a first vacuum system. Alternatively or additionally, a second vacuum source chamber, in particular a second fan chamber, can be provided, especially in a second vacuum system. These two vacuum source chambers can be fluidically connected to each other. This allows a vacuum to be generated at the first or second vacuum point, depending on the first and second vacuum sources, particularly via a first or second vacuum channel and the fluidic connections formed by these channels. The fluidic connection, located downstream, i.e., close to the vacuum sources, allows a direct interaction between the two vacuum sources to be simulated. In this way, a single vacuum source can be "simulated."In this context, the term "simulated" means in particular that the overall system resulting from the fluidic connection, especially at the two points of negative pressure, experiences a negative pressure and / or flow dynamics as if from a single source of negative pressure (with corresponding power).

[0031] Alternatively or additionally, the (fluidic) connection between the first vacuum system and the second vacuum system can be located in at least one filter chamber. This allows a first vacuum level in the first vacuum system or at the first vacuum point to be related to a vacuum level in the second vacuum system or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in vacuum allocation.

[0032] A first filter chamber of a first vacuum system may, in particular, include fiber filtration. Specifically, a filter may be provided that is designed to filter fibers and / or fiber fragments from a fluid stream and / or discharge them into a container in order to clean the fluid before it is discharged into the environment. Alternatively or additionally to discharge into the environment, (partial) recirculation into another part of a textile machine may also be provided.

[0033] A second filter chamber of a second vacuum system can be designed, in particular, to retain parts of a thread, especially thread fragments, for example by filtering them out of a fluid stream and / or by diverting them into a container to clean the fluid before it is discharged into the environment. Alternatively or in addition to discharge into the environment, (partial) recirculation into another part of a textile machine can also be provided.

[0034] By creating a fluidic connection between the filter chambers, filtration can be improved, as the negative pressure can be applied directly to the filter chambers. Furthermore, embodiments can be designed to create a secondary filtration stage. This can be achieved, in particular, by generating a net fluid flow that first performs coarse filtration, followed by fine filtration. Fine filtration can specifically remove filamentous and / or fibrous dust.

[0035] Alternatively or additionally, the (fluidic) connection between the first vacuum system and the second vacuum system can be located in at least one vacuum channel. This allows a first vacuum level in the first vacuum system or at the first vacuum point to be related to a vacuum level in the second vacuum system or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in vacuum distribution.

[0036] A first vacuum channel can be configured to establish a fluidic connection between a first vacuum source and a first vacuum point. Within this channel, a fluid flow can form between the first vacuum point and the first vacuum source. This allows (part of) a first vacuum system to be formed.

[0037] A second vacuum channel can be configured to create a fluidic connection between a second vacuum source and a second vacuum point. A fluid flow can then be established between the second vacuum point and the second vacuum source. This allows (part of) a second vacuum system to be formed.

[0038] A fluidic (cross-) connection between a first vacuum channel and a second vacuum channel can be designed, in particular, to allow for rapid adjustment of the vacuum conditions. Specifically, a fluidic connection between the first vacuum system and / or the second vacuum system can be established close to (in the sense of as far upstream as possible and / or as practical) the first and / or second vacuum point.

[0039] Here and elsewhere, a flow, especially a fluid flow, can travel from a point of low pressure to a source of low pressure. The flow can follow a pressure gradient.

[0040] From one perspective, the connection between the first and second vacuum systems can be regulated. This allows the first vacuum level in the first system, or at the first vacuum point, to be regulated by the vacuum level in the second system, or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and greater flexibility in vacuum allocation. Furthermore, it allows for adjustments to be made in response to changes in conditions at at least one of the vacuum points, such as a change in the operating state of at least one of the working components.

[0041] Regulation can be achieved by controlling a fluid flow regulating device. Examples of fluid flow regulating devices include, in particular, at least one controllable valve, at least one controllable gate valve, and / or a controllable bypass between a first vacuum system and a second vacuum system.

[0042] From one perspective, the connection between the first vacuum system and the second vacuum system can be regulated via at least one control device. This allows a first vacuum level in the first vacuum system, or at the first vacuum point, to be regulated by a vacuum level in the second vacuum system, or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in vacuum allocation. Furthermore, it allows for consideration of changes in conditions at at least one of the vacuum points, such as a change in the operating state of at least one of the working components.

[0043] A control device can be a computer control system. A control device can also be a programmable or programmed machine control system. A machine-readable code can be read into a machine control system, which, when executed on the control device, can perform a procedure as described elsewhere. For this purpose, the textile machine or parts thereof can be designed and equipped to provide corresponding communication channels with at least one control device to receive and / or send signals to execute a procedure as described elsewhere. In particular, an adjustable fluid flow control device, especially one comprising an adjustable valve, an adjustable slide valve, and / or an adjustable bypass, can be provided between the two vacuum systems, especially the two fluid-carrying (air-carrying) vacuum channels.A vacuum channel can, in particular, include a spinning channel and an air channel for upper thread detection and / or a pneumatic thread storage system. A control device can, in particular, also control at least one vacuum source, especially a fan, as described elsewhere. Sensors can, in particular, be provided to measure fluid flow and / or pressure. These sensors can, in particular, be configured to transmit signals, especially to a control device, in order to generate a control signal to enable regulation, as described elsewhere.

[0044] Alternatively or additionally, the connection between the first vacuum system and the second vacuum system can be regulated via at least one frequency converter. The frequency converter can be designed and configured to control at least one vacuum source (synonym: vacuum generator). This allows a first vacuum level in the first vacuum system or at the first vacuum point to be regulated by a vacuum level in the second vacuum system or at the second vacuum point. In particular, the vacuum levels can complement and / or compensate for each other. This allows for further improvement and, in particular, greater flexibility in vacuum allocation. Furthermore, it allows for adjustments to be made in response to changes in conditions at at least one of the vacuum points, such as a change in the operating state of at least one of the working components.

[0045] An operating state can be a suction strength at a specific vacuum level (synonym: vacuum level). An operating state can also include a shutdown function. An operating state can also represent the opening state of a fluid flow control device.

[0046] An operating condition can also be the vacuum requirement of a workstation or the simultaneous vacuum requirement of a specified number of workstations for a thread splice, particularly for a spinner. For performing a thread splice at a workstation, a second vacuum point for drawing in the thread, in particular a suction nozzle for taking in a thread from a take-up spool and / or a thread storage nozzle for taking in a thread, has an increased vacuum requirement. This means that, with a corresponding vacuum requirement, the connection between the first and the second vacuum system can be fully or partially opened so that the first vacuum system can assist the second vacuum system in maintaining the necessary vacuum level.

[0047] The regulation (synonyms: control; regulation) can also be carried out via one of the two frequency converters controlling the vacuum sources, which can also communicate with the frequency converter of the second vacuum source for this purpose.

[0048] A frequency converter is, in particular, a power converter that can generate a different alternating voltage from a given alternating voltage. The output frequency and amplitude can be varied. These devices, especially in contrast to "simple" converters, are primarily used to power three-phase asynchronous motors, as they can adjust the frequency and amplitude of the output AC voltage using sensor technology according to the motor's application and its current load. Servo converters can also have inputs for the rotor's angular position and can be used as positioning drives. This allows, in particular, the implementation of intermediate opening steps in a fluid flow control device. Depending on their design, frequency converters can be powered by single-phase AC, three-phase AC, or DC voltage and generate a three-phase AC voltage from this to supply three-phase motors.Frequency converters are, in particular, electronic devices without mechanically moving components.

[0049] From one perspective, the connection can be designed and arranged to be automatically regulated depending on the respective operating states of the vacuum systems, in particular to be fully or partially opened or closed. This makes it possible, in particular, to enable regulation depending on the previously described operating state. This allows the previously described advantages and effects to be realized. Reference is made here specifically to the explanations regarding the fluid flow regulation device.

[0050] From one perspective, the (fluidic) connection can be designed and arranged to regulate a fluid flow through a fluid flow regulating device, in particular to at least partially close it. Reference is made here specifically to the explanations regarding the fluid flow regulating device as described elsewhere. This results in the effects and advantages described elsewhere. For the sake of readability and conciseness, these passages are not repeated here, and the reader is referred to those sections.

[0051] From an independent perspective, the problem is solved, in particular, by a method for vacuum distribution. This method may include the step of controlling at least one fluid flow regulating device to regulate the fluid flow between a first vacuum system and a second vacuum system, specifically to at least partially close the connection between the two systems. Reference is made here to the details regarding the fluid flow regulating device and the control unit as described elsewhere. The effects and advantages described elsewhere are particularly evident in this context. For the sake of readability and conciseness, these passages are not repeated here, and the reader is referred to those sections.

[0052] From an independent perspective, the task is solved, in particular, by a control device as described elsewhere. The control device can be designed and configured to execute a procedure as described elsewhere. The control device can be arranged in a textile machine as described elsewhere. There can also be embodiments in which the control device is external to the textile machine, in particular by regulating the textile machine, as described elsewhere, in a decentralized computing system, especially in a cloud. Alternatively or additionally, the control device can be decentralized across the textile machine, for example, distributed across several workstations. At least partially redundant copies of at least one control device can also be provided, for example, at specific workstations.

[0053] The embodiments and aspects with the described features, effects, and advantages of one category (device, system, method) also describe, in particular, the embodiments and aspects of other categories (device, system, method). In other words, this means that the textile machine can be described by the features, effects, and advantages of the control device or the method. Alternatively or additionally, the method can be described by the features, effects, and advantages of the control device and / or the textile machine. Alternatively or additionally, the control device can be described by the features, effects, and advantages of the method and / or the textile machine.

[0054] Exemplary embodiments of the invention are described in more detail below with reference to the figures, which show schematically and by way of example: Fig. 1 is a schematic representation of a first embodiment of a textile machine; Fig. 2 is a schematic representation of a second embodiment of a textile machine; Fig. 3 is a schematic representation of a third embodiment of a textile machine; and Fig. 4 is a schematic representation of an embodiment of a method.

[0055] The same reference symbols are used for elements and structures that have the same effect and / or are of the same type.

[0056] Fig. 1 Figure 1 shows a schematic representation of a first embodiment of a textile machine 18. The textile machine 18 can in particular be a spinning machine, and more specifically a rotor spinning machine.

[0057] The textile machine 18 can have at least one first vacuum point 11 for producing a thread. This first vacuum point 11 can in particular be a spinning device, especially a spinneret. Thus, the first vacuum point 11 serves in particular for spinning a thread.

[0058] The textile machine 18 can additionally or alternatively have at least one second vacuum point 12 for drawing in the thread. This second vacuum point 12 for drawing in the thread can have at least one suction nozzle for receiving an upper thread from a bobbin, in particular in the form of a cross-wound bobbin. Alternatively or additionally, the second vacuum point 12 for drawing in the thread can have a thread storage nozzle for receiving a thread. Alternatively or additionally, the second vacuum point 12 can have a working element that can be pressurized with vacuum. This working element can, in particular, have a thread splicing device, which can be designed and arranged to unravel a thread end after a thread break in order to allow for re-spinning.

[0059] The textile machine 18 additionally or alternatively has at least one first vacuum system 1, which is particularly designed and arranged to be able to be brought into a fluidic connection 13 with the first vacuum point 11. Alternatively, the first vacuum system 1 can be designed and arranged to be in a fluidic connection 13 with the first vacuum point 11, in particular permanently.

[0060] The textile machine 18 has – additionally or alternatively – at least one second vacuum system 3, which is particularly designed and arranged to be able to be brought into a fluidic connection 14 with the second vacuum point 12. Alternatively, the second vacuum system 3 can be designed and arranged to be in a fluidic connection 14 with the second vacuum point 12, in particular permanently.

[0061] The textile machine can selectively establish or interrupt a connection 15, 16, 17, in particular to be described as a bypass connection, cross connection or as a transverse connection, between the first vacuum system 1 and the second vacuum system 3 by means of a fluid flow regulating device 19.

[0062] This allows the installed power of the first vacuum source 2 to be kept within limits by selecting a fan of limited size for upper thread capture. This saves resources. Nevertheless, a higher number of simultaneous spinners (working elements or parts of a workstation for spinning) can be ensured as active second vacuum points 12 or active working elements for spinning a thread than the power of a second vacuum source 4 alone could provide. Therefore, a connection 15, 16, 17 can be designed to make the fluidic connection between the two vacuum systems adjustable. The connection 15, 16, 17 between the first vacuum system 1 and the second vacuum system 3 can be regulated.

[0063] The second vacuum point 12 for drawing in the thread has, in particular, a suction nozzle for receiving an upper thread from a spool, especially a cross-wound spool. This can be a thread storage nozzle for receiving a thread.

[0064] Alternatively or additionally, it can be a working element that can be subjected to negative pressure, as described elsewhere.

[0065] The connection 15, 16, 17 between the first vacuum system 1 and the second vacuum system 3 is, in particular, controllable via at least one control unit 5. Alternatively or additionally, the first vacuum system 1 is controllable via at least one frequency converter 7. This frequency converter 7 is specifically designed and configured to control at least one vacuum source 2, 4. For clarity, any cable connections (as a form of communication channels) are not shown here. Wireless applications are also possible.

[0066] The connection 15, 16, 17 is specifically designed and arranged to be automatically regulated depending on the respective operating states of the vacuum systems 1, 3. This regulation can be effected, in particular, by a complete or partial opening or closing.

[0067] The connection 15, 16, 17 is specifically designed and arranged to regulate a fluid flow by means of a fluid flow regulating device 19, in particular to at least partially close it. A fluid flow regulating device 19 can, in particular, consist of an adjustable valve, an adjustable slide, and / or an adjustable bypass between the two (air-carrying) vacuum channels (spinning channel and air channel for upper thread capture and / or a pneumatic thread storage unit). The regulation can optionally be carried out via the appropriately programmed machine control, or alternatively via one of the two frequency converters 7 controlling the vacuum sources 2, 4. For this purpose, the frequency converter 7 of the first vacuum source 2 can communicate with the frequency converter 7 (not shown here as a separate device for clarity) of the second vacuum source 4.This additional regulation avoids the need to install additional power or correspondingly stronger (or larger) vacuum sources 2, 4, which would increase costs but would only be used occasionally, for example, under high demands. For this reason, resource expenditure during the construction of a textile machine is significantly reduced. In various embodiments, the requirement for the applied vacuum is particularly similar. This allows a bypass connection with a base fluid flow to be kept permanently open in some embodiments.

[0068] The embodiments described here allow, in particular, that if, due to the requirements of the individual vacuum systems 1, 3, one of the installed vacuum sources 2, 4 (also called vacuum drives) for vacuum generation operates significantly below a performance limit, then, by using a connection 15, 16, 17 between the vacuum systems 1, 3, one of the vacuum sources 2, 4 of a first vacuum system 1 or a second vacuum system 3 with a remaining power reserve can support the other vacuum source 2, 4. For example, a number of simultaneous upper thread processes and / or simultaneous spinning processes could be additionally enabled, which the respective installed vacuum source 4 for suction of an upper thread (also referred to as upper thread handling) could not guarantee on its own, as long as the vacuum source 2 for the spinning vacuum still has power reserves.

[0069] The vacuum allocation can be further improved, in particular by eliminating a complete separation between the two vacuum systems 1, 3, by creating an adjustable connection 15, 16, 17, in particular in the form of an adjustable bypass, between the two vacuum systems 1, 3.

[0070] This connection 15, 16, 17 can be fully or partially opened or closed automatically, depending on the respective operating states of the vacuum systems 1, 3. This can be done in a regulated manner, as described elsewhere.

[0071] Fig. 1Figure 18 shows in particular a textile machine 18, wherein the connection 15, 16, 17, as well as a fluid flow regulating device 19 associated with this connection 15, is arranged between the first vacuum system 1 and the second vacuum system 3 in the region of a vacuum source chamber 6, 8. The vacuum source chamber 6, 8 can in particular be a fan chamber. A fan is in particular configured to create a vacuum at one of the vacuum points 11, 12 by means of an airflow via the associated vacuum channel 13, 14. In particular, a fluidic communication is established between the first or second vacuum source 2, 4 and the first or second vacuum point 11, 12. This allows a fluid connection to be formed upstream to simulate the use of a single vacuum source, as described elsewhere.

[0072] Fig. 2Figure 1 shows a schematic representation of a second embodiment of a textile machine 18. According to the embodiment shown, the connection 16 can be arranged between the first vacuum system 1 and the second vacuum system 3 in the area of ​​the fiber filter chamber 9 and the yarn filter chamber 10. The fiber filter chamber 9 serves in particular to filter fiber fragments from a spinning process. A filter device may also be provided (not shown here). Additionally or alternatively, a fiber collection container (not shown) may be provided to capture fibers and fiber fragments that may be generated as residues during a spinning process. The yarn filter chamber 10 serves in particular to filter yarn fragments, for example, during the initial spinning stage. A yarn collection container (not shown) may also be provided to collect the yarn fragments that may be generated during yarn breakage and / or during the initial spinning stage.This allows a fluidic compound 16 to be designed in such a way as to improve filtration, as described elsewhere.

[0073] Fig. 3 Figure 1 shows a schematic representation of a third embodiment of a textile machine 18. According to the embodiment shown, the connection 17 can be arranged between the first vacuum system 1 and the second vacuum system 3 in the region of at least one of the vacuum channels 13, 14. In particular, a connection 17 can be established downstream to locate fluidic communication close to the vacuum points 11, 12. This allows the regulation of the connection 17 to be directly adapted to the operating requirements of the vacuum points 11, 12.

[0074] Fig. 4Figure 1 shows a schematic representation of an embodiment of a method 20 for vacuum distribution. The method 20 may include the step of receiving 22 at least one piece of information about the operating state of at least one vacuum point 11, 12. The method 20 may also include the step of providing 24 at least one control signal, generated based on information about the operating state of at least one vacuum point 11, 12. Finally, the method 20 may include the step of controlling 26 at least one fluid flow regulating device 19 to regulate a fluid flow between a first vacuum system 1 and a second vacuum system 3 by regulating the connection 15, 16, 17 between the first vacuum system 1 and the second vacuum system 3, in particular by at least partially closing it.

[0075] The term "may" refers in particular to optional features of the invention. Accordingly, there are also further developments and / or embodiments of the invention that additionally or alternatively include the respective feature(s).

[0076] From the combinations of features disclosed herein, isolated features can, if necessary, be selected within the scope of the claims and used in combination with other features to define the subject matter of the claim, thereby dissolving any structural and / or functional relationship that may exist between the features. Reference symbol list

[0077] 1. First vacuum system 2. First vacuum source 3. Second vacuum system 4. Second vacuum source 5. Control device 6. First vacuum source chamber 7. Frequency converter 8. Second vacuum source chamber 9. First filter chamber / fiber filter chamber 10. Second filter chamber / thread filter chamber 11. First vacuum point 12. Second vacuum point 13. First vacuum channel as a fluidic connection between the first vacuum point and the first vacuum source 14. Second vacuum channel as a fluidic connection between the second vacuum point and the second vacuum point 15. Fluidic connection in the area of ​​a vacuum source chamber 16. Fluidic connection in the area of ​​a filter chamber 17. Fluidic connection in the area of ​​a vacuum channel 18. Textile machine 19. Fluid flow regulating device 20. Method for vacuum allocation 22. Acquiring at least one piece of information about an operating state of at least one vacuum point 24. Providing at least one control signal26 Controlling at least one fluid flow regulating device

Claims

1. A textile machine (18), in particular a spinning machine, further in particular a rotor spinning machine, comprising: - at least one first negative pressure point (11) for producing a thread; - at least one second negative pressure point (12) for sucking in the thread; - at least one first negative pressure system (1) that is designed and arranged in order to be brought into a fluidic connection (13) with the first negative pressure point (11) or is designed and arranged in order to be in a fluidic connection (13) with the first negative pressure point (11); - at least one second negative pressure system (3) that is designed and arranged in order to be brought into a fluidic connection (14) with the second negative pressure point (12) or is designed and arranged in order to be in a fluidic connection (14) with the second negative pressure point (12); wherein the negative pressure systems (1, 3) each comprise at least one negative pressure source chamber (6, 8), in particular a fan chamber, a filter chamber (9, 10), and a negative pressure channel (13, 14), characterized in that a connection (15, 16, 17), in particular a bypass connection, is formed between the first negative pressure system (1) and the second negative pressure system (3) in such a way that the connection (15, 16, 17) can be selectively established or interrupted.

2. The textile machine (18) according to claim 1, characterized in that the first negative pressure point (11) comprises a spinning apparatus for producing the thread.

3. The textile machine (18) according to one of the claims 1 or 2, characterized in that the second negative pressure point (12) for sucking in the thread comprises at least one of the following: - a suction nozzle for picking up a thread from a take-up bobbin, in particular a cross-wound bobbin; - a thread storage nozzle for picking up a thread; and - a working element that can be subjected to negative pressure.

4. The textile machine (18) according to one of the preceding claims, characterized in that the connection between the first negative pressure system (1) and the second negative pressure system (3) is arranged in at least one of the following regions: - the negative pressure source chambers (6, 8), in particular a fan chamber; - the filter chambers (9, 10); and - the negative pressure channels (13, 14).

5. The textile machine (18) according to one of the preceding claims, characterized in that the connection (15, 16, 17) between the first negative pressure system (1) and the second negative pressure system (3) can be adjusted.

6. The textile machine (18) according to one of the preceding claims, characterized in that the connection (15, 16, 17) between the first negative pressure system (1) and the second negative pressure system (3) can be adjusted via at least one of the following: - at least one control device (5); and - at least one frequency converter (7); in each case designed and configured in order to control at least one negative pressure source (2, 4).

7. The textile machine (18) according to one of the preceding claims, characterized in that the connection (15, 16, 17) is designed and arranged in order to be automatically adjusted as a function of the respective operating states of the negative pressure systems (1, 3), in particular to be fully or partially opened or closed.

8. The textile machine (18) according to one of the preceding claims, characterized in that the connection (15, 16, 17) is designed and arranged in order to adjust a fluid flow by means of a fluid flow adjustment apparatus (19), in particular in order to at least partially close it.

9. A method (20) for allocating negative pressure, for a textile machine according to one of the claims 1 to 8, characterized by the step: - an actuation (26) of at least one fluid flow adjustment apparatus (19), in order to adjust a fluid flow between a first negative pressure system (1) and a second negative pressure system (3), in particular in order to adjust a connection (15, 16, 17) between a first negative pressure system (1) and a second negative pressure system (3), in particular to at least partially close it.

10. A control device (5), which is designed in order to carry out a method (20) according to claim 9 and / or is designed and configured for a textile machine (18) according to one of the claims 1 to 8.