Patent Application
20240410088
The invention relates to a textile machine. The invention also relates to a method for allocating negative pressure. The invention further relates to a control device.
Textile machines are known from the prior art. It is thereby possible to subject a spinning apparatus to negative pressure for producing a thread at a work station. At least one suction nozzle can also be provided, which is subjected to a negative pressure in order to pick up an upper thread from a bobbin, for example after a thread breakage.
EP 3 901 336 A1 describes such a textile machine in the form of a spinning machine. This comprises a plurality of work stations arranged next to one another, each of which comprises a spinning apparatus that can be subjected to negative pressure for producing a thread along with a suction nozzle that can be subjected to negative pressure to find a thread end on a bobbin. The thread of such a thread end to be picked up can be referred to as the upper thread. The textile machine comprises at least a first negative pressure system. This comprises at least one first negative pressure channel extending along the work stations of the spinning machine along with at least one first negative pressure source. The spinning apparatuses of the work stations are connected to the first negative pressure system. The spinning machine comprises at least a second negative pressure system. This comprises at least one second negative pressure channel extending along the work stations of the spinning machine and at least one second negative pressure source. The suction nozzles of at least a first partial number of the work stations, preferably all work stations, are connected to the second negative pressure system. The first and second negative pressure systems are completely separated from one another pneumatically.
This enables the separate regulation of the spinning vacuum and the negative pressure for collecting upper threads. Thus, each of the two function groups of “Spinning” and “Upper thread handling” can be separately assigned an optimized negative pressure. The power of the negative pressure is specified by the respective negative pressure system. The design and dimensioning of the negative pressure is specified, which can have a restrictive effect.
Thus, the object of the invention is to make the structure of a textile machine more flexible. The object of the invention is to further improve an allocation of negative pressure. The object of the invention is to make the allocation of negative pressure more flexible.
The object is achieved by a textile machine having the features of claim 1. The object is further achieved by a method having the features of claim 9. The object is further achieved by a control device with the features of claim 10.
Advantageous embodiments of the invention are the subject matter of the dependent claims.
According to one aspect, the object can be achieved by a textile machine according to claim 1.
A textile machine can comprise at least one first negative pressure point for producing a thread. The textile machine can comprise at least one second negative pressure point for sucking in the thread. The textile machine can comprise at least one first negative pressure system. This can be designed and arranged so that it can be brought into a fluidic connection with the first negative pressure point. Alternatively, the first negative pressure system can be designed and arranged in order to be in a fluidic connection with the first negative pressure point. The textile machine can comprise at least one second negative pressure system. This can be designed and arranged so that it can be brought into a fluidic connection with the second negative pressure point. Alternatively, the second negative pressure system can be designed and arranged in order to be in fluidic connection with the second negative pressure point. A connection between the first negative pressure system and the second negative pressure system can be designed in such a way that the connection can be selectively established or interrupted as required. As a result, a textile machine can be designed more flexibly, since the negative pressure systems can be designed in order to be adapted to one another, in order to connect to one another the different negative pressure levels, which are created by a fluidic connection between the first negative pressure system at the first negative pressure point and the second negative pressure system at the second negative pressure point. As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in a relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
In particular, a textile machine can be a spinning machine, further in particular a rotor spinning machine. It can be provided that a spinning apparatus is provided as a working element, which comprises one of the negative pressure points. Such a negative pressure point can be provided in a spinning apparatus. A spinning apparatus can be designed in order to spin a thread from the fibers presented.
In particular, a textile machine can comprise at least one work station. Alternatively, a textile machine can comprise a plurality of work stations. In particular, a work station is designed in order to spin a thread from fibers in a spinning apparatus, in particular as described elsewhere. Furthermore, a work station can comprise a bobbin-forming apparatus, in particular as described elsewhere, in order to wind a thread onto a bobbin.
A negative pressure system can be designed in order to cover the suction fluid requirements of one or more work stations or negative pressure points arranged therein. This can vary depending on the requirements of the work station or the negative pressure point. Different negative pressure systems can be provided in order to cover these different negative pressure requirements. The textile machine's own suction air systems can be provided with a negative pressure source. A negative pressure source can comprise a drive motor. This can be connected to a frequency converter and its speed can be set in a defined manner in order to be able to set a negative pressure level. As a result, negative pressure requirements, in particular suction air requirements, of the textile machine or the negative pressure points can be adapted within certain limits by setting the speed of the drive motor.
For example, the drive motor initially runs at a speed at which the negative pressure in the negative pressure system can form a certain minimum level at which, for example, a proper carrying out of the function of a working element to which a negative pressure point is assigned is not undercut in particular.
Alternatively, a control device can be provided, as described elsewhere, in order to control a drive motor.
In particular, a fluidic connection can be designed in such a way as to form a fluid flow between a negative pressure system and a negative pressure point. The fluid flow is defined in particular in such a way that it runs from the negative pressure point to a negative pressure source of the negative pressure system, i.e., in particular follows a particle flow movement (for example, of air particles). A negative pressure system can be provided to form a fluidic connection between the negative pressure source and the negative pressure point. The negative pressure system can comprise a negative pressure channel. Alternatively or additionally, the negative pressure system can comprise at least one collecting apparatus for thread and/or fiber remnants. This collecting apparatus can comprise a filter system. Alternatively or additionally, the collecting apparatus can comprise a storage apparatus, such as a container for receiving corresponding thread and/or fiber remnants.
A connection between the first negative pressure system and the second negative pressure system can, in particular, be a bypass connection. The connection can be formed at least temporarily. In other words, a transverse connection or cross-connection can be formed between the first negative pressure system and the second negative pressure system, in order to fluidically connect the negative pressure systems to one another. This fluidic connection is used in particular to compensate for an installed power of a (first or second) negative pressure system that is limited in terms of size (i.e., the negative pressure level that can be formed as well), in particular by selecting another (second or first) negative pressure system that is limited in terms of size (i.e., the negative pressure level that can be formed as well), but is adapted accordingly to the requirements. In other words, a negative pressure level can be formed at different (first and second) negative pressure points by the fluidic connection of these negative pressure points with negative pressure sources through the two negative pressure systems. The sizes of the two negative pressure systems can also be adapted to one another in such a way that an overall requirement for the different negative pressure levels at the different (first and second) negative pressure points can be adapted via the fluidic connection.
It can be provided that a bobbin is formed from a spun thread in a bobbin-producing, in particular cross-wound bobbin-producing, apparatus. A working element can be provided on the bobbin-producing apparatus in order to pick up a thread, in particular an upper thread, or an end of a thread, in particular an end of an upper thread, from a bobbin to be produced, in particular a cross-wound bobbin. The second negative pressure point can be assigned to the working element or arranged on or in it.
The bobbin to be produced is also referred to as a take-up bobbin. Since the take-up bobbin is often, but not necessarily, located in the upper region of a work station, the thread that is wound onto the take-up bobbin or retrieved from the take-up bobbin is referred to as the upper thread.
The thread retrieved from the take-up bobbin is required in order to re-initiate a thread spinning process after a thread breakage or cleaner cut (referred to as piecing).
According to one aspect, the first negative pressure point for producing the thread can be a spinning apparatus, in particular a spinneret. As a result, a negative pressure can be applied in order to spin a thread. The negative pressure is used in particular to attach fibers to a forming thread. As a result, the negative pressure level at the spinning apparatus can be supplemented and/or compensated by a negative pressure level of the second negative pressure system. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
In other embodiments or in other words, the spinning apparatus, in particular the spinneret, can comprise the first negative pressure point. In particular, the negative pressure point can be a technical structural formation in a spinning apparatus. In particular, this can be a negative pressure connection and/or a negative pressure nozzle and/or a negative pressure connection, such as a fluid outlet.
In particular, a suction nozzle can be designed in order to form a suction fluid flow, in particular a suction air flow. With a rotor spinning machine, the spinning apparatus can comprise a rotor housing in which a suction air flow can be formed. A so-called spinning vacuum can be formed in such a rotor housing. During a spinning operation, for example, this ensures that the individual fibers combed out of a feed sliver by an opening roller are fed into the spinning rotor via a fiber guide channel, where they are twisted into a thread.
According to one aspect, the second negative pressure point for sucking in the thread can comprise at least one suction nozzle for picking up a thread from a take-up bobbin. The negative pressure is used in particular to pick up the thread from a take-up bobbin. As a result, the negative pressure level at the suction nozzle can be supplemented and/or compensated by a negative pressure level of the first negative pressure system. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
Alternatively or additionally, the second negative pressure point for sucking in the thread can comprise at least one thread storage nozzle for picking up a thread. The negative pressure is used in particular to pick up a thread in a thread nozzle, in particular a pneumatic thread nozzle, in order to keep the thread under tension for re-piecing. As a result, the negative pressure level at the thread storage nozzle can be supplemented and/or compensated by a negative pressure level of the first negative pressure system. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
Alternatively or additionally, the second negative pressure point for sucking in the thread can be at least one working element that can be subjected to negative pressure. The negative pressure is used in particular to distribute a negative pressure to further working elements. In particular, this is not a negative pressure point as described elsewhere in relation to the first negative pressure point. The negative pressure level can be supplemented and/or compensated at the working element by a negative pressure level of the first negative pressure system. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
An example of such a working element is, in particular, a negative pressure nozzle for thread splicing in a thread splicing device. In particular, a thread splicing can be designed in such a way as to unravel and “fray” a thread end, in particular of an upper thread, in such a way as to re-initiate a piecing process. A negative pressure can lead to the formation of a fluid flow, in particular a suction air flow. The fluid flow can be designed in order to interact with the thread end, wherein the spun thread begins to separate from the end. As a result, the winding of the fibers is in particular loosened, and in particular attachment points or attachment regions arise in order to enable the attachment of further fibers for piecing.
Here and elsewhere, the term “bobbin” or “take-up bobbin” can refer in particular to a cross-wound bobbin. Cross-wound bobbins are formed in particular by winding a thread, which has been formed from a spinning apparatus, onto a bobbin sleeve or onto a partially formed cross-wound bobbin via a thread traversing apparatus. The configuration of a cross-wound bobbin enables a particularly stable winding of the bobbin, since the thread holds itself on the cross-wound bobbin due to the type of winding.
According to a preferred embodiment, the negative pressure systems in each case comprise at least one negative pressure source chamber, in particular a fan chamber, a filter chamber and a negative pressure channel.
According to one aspect, the (fluidic) connection between the first negative pressure system and the second negative pressure system can be arranged at least in a negative pressure source chamber, in particular a fan chamber. As a result, a first negative pressure level in the first negative pressure system or at the second negative pressure point can be set in a relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
A first negative pressure source chamber, in particular a first fan chamber, can be provided in a first negative pressure system. Alternatively or additionally, a second negative pressure source chamber, in particular a second fan chamber, can be provided, in particular in a second negative pressure system. In particular, these two negative pressure source chambers can be fluidically connected to one another. As a result, a negative pressure can be formed at the first or second negative pressure point, in particular via a first or second negative pressure channel and via the fluidic connections formed by these to the first or second negative pressure point, depending on the first and second negative pressure source. Due to the fluidic connection downstream, i.e., close to the negative pressure source, a direct interaction between the two negative pressure sources can be replicated. A single negative pressure source can be “simulated.” In this connection, the term “simulated” means in particular that the overall system resulting from the fluidic connection, in particular at the two negative pressure points, experiences a negative pressure and/or flow dynamics as from a single negative pressure source (with corresponding power).
Alternatively or additionally, the (fluidic) connection between the first negative pressure system and the second negative pressure system can be arranged at least in a filter chamber. As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in a relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
In particular, a first filter chamber of a first negative pressure system can comprise a fiber filter. In particular, a filter can be provided which is designed to filter fibers and/or fiber fragments from a fluid flow and/or to discharge them into a container in order to clean the fluid before it is discharged into the surrounding area. As an alternative or in addition to discharge into the surrounding area, (partial) recirculation into a (different) part of a textile machine can also be provided.
A second filter chamber of a second negative pressure system can be designed in particular to retain parts of a thread, in particular thread fragments, for example by filtering them out of a fluid flow and/or by discharging them into a container in order to clean the fluid before discharging it into the surrounding area. As an alternative or in addition to discharge into the surrounding area, a (partial) recirculation into another part of a textile machine can also be provided.
By forming a fluidic connection between the filter chambers, filtration in particular can be improved, since the negative pressure can be applied directly to the filter chambers. In addition, there may be embodiments in which the application of the negative pressure is designed in such a way as to form a post-filtration. In particular, this can be effected in such a way that a net fluid flow can be formed, with which coarse filtering can be carried out first, followed by fine filtering. In particular, fine filtration can also filter out thread dust and/or fiber dust.
Alternatively or additionally, the (fluidic) connection between the first negative pressure system and the second negative pressure system can be arranged in at least one negative pressure channel. As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in a relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible.
A first negative pressure channel can be designed in order to form a fluidic connection between a first negative pressure source and a first negative pressure point. A fluid flow can be formed between the first negative pressure point and the first negative pressure source. As a result, a (part of a) first negative pressure system can be formed.
A second negative pressure channel can be designed in order to form a fluidic connection between a second negative pressure source and a second negative pressure point. A fluid flow can be formed between the second negative pressure point and the second negative pressure source. As a result, a (part of a) second negative pressure system can be formed.
A fluidic (transverse/cross) connection between a first negative pressure channel and a second negative pressure channel can be designed in particular in such a way as to enable a rapid adaptation of the negative pressure conditions. In particular, a fluidic connection between the first negative pressure system and/or the second negative pressure system can be enabled close (in the sense of as far upstream as possible and/or as practical) to the first and/or second negative pressure point.
Here and elsewhere, a flow, in particular a fluid flow, can run from a negative pressure point to a negative pressure source. The flow can run along a negative pressure gradient.
According to one aspect, the connection between the first negative pressure system and the second negative pressure system can be adjustable. As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in an adjustable relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible. Furthermore, a change in the conditions at least one of the negative pressure points, such as a change in the operating state of at least one of the working elements, can be taken into account.
Regulation can be effected by actuating a fluid flow adjustment apparatus. Examples of fluid flow adjustment apparatuses can in particular comprise at least one adjustable valve, at least one adjustable slide valve and/or an adjustable bypass between a first negative pressure system and a second negative pressure system.
According to one aspect, the connection between the first negative pressure system and the second negative pressure system can be adjustable via at least one control device. As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in an adjustable relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible. Furthermore, a change in the conditions at least one of the negative pressure points, such as a change in the operating state of at least one of the working elements, can be taken into account.
A control device can be a computer controller. A control device can comprise a programmable or programmed machine controller. A machine-readable code can be read into a machine controller, which can execute a method as described elsewhere when the machine-readable code is executed on the control device. For this purpose, the textile machine or parts thereof can be designed and configured in order to form corresponding communication channels with at least the one control device, in order to receive and/or transmit signals in order to carry out a method as described elsewhere. In particular, an adjustable fluid flow adjustment apparatus, in particular one having an adjustable valve, an adjustable slide valve and/or an adjustable bypass, can be provided between the two negative pressure systems, in particular the two fluid-carrying (air-carrying) negative pressure channels. In particular, a negative pressure channel can comprise a spinning channel along with an air channel for collecting upper threads and/or a pneumatic thread storage unit. In particular, a control device can also actuate at least one negative pressure source, in particular a fan, as described elsewhere. In particular, sensors can be provided in order to measure a fluid flow and/or a pressure. In particular, the sensors can be designed in such a way as to transmit signals, in particular to a control device, in order to be able to generate a control signal in order to enable an adjustment, as described elsewhere.
Alternatively or additionally, the connection between the first negative pressure system and the second negative pressure system can be adjusted via at least one frequency converter. The frequency converter can be designed and configured in order to control at least one negative pressure source (synonym: a negative pressure generator). As a result, a first negative pressure level in the first negative pressure system or at the first negative pressure point can be set in an adjustable relationship with one another by a negative pressure level in the second negative pressure system or at the second negative pressure point. In particular, the negative pressure levels can complement and/or compensate one another. As a result, the allocation of negative pressure can be further improved and, in particular, made more flexible. Furthermore, a change in the conditions at least one of the negative pressure points, such as a change in the operating state of at least one of the working elements, can be taken into account.
An operating state can be a suction strength at a certain negative pressure level (synonym: negative pressure level). Switching off can also be provided in an operating state. An operating state can also comprise an opening state of a fluid flow adjustment apparatus.
An operating state can also be the negative pressure requirement of a work station or the simultaneous negative pressure requirement of a specified number of work stations for a thread connection, in particular for a piecer. To carry out a thread connection at a work station, a second negative pressure point for sucking in the thread, in particular a suction nozzle for picking up a thread from a take-up bobbin and/or a thread storage nozzle for picking up a thread, has an increased negative pressure requirement. This means that, with a corresponding negative pressure requirement, the connection between the first and second negative pressure systems can be fully or partially opened, so that the first negative pressure system can support the second negative pressure system in maintaining the necessary negative pressure level.
Regulation (synonyms: control; adjustment) can also be effected via one of the two frequency converters actuating the negative pressure sources, which can also communicate with the frequency converter of the second negative pressure source for this purpose.
In particular, a frequency converter is a power converter that can generate a different alternating voltage from a supplied alternating voltage. The output frequency and output amplitude can be changed. In contrast to “simple” converters, these devices are mostly used to supply three-phase asynchronous motors, since they can regulate the frequency and amplitude of the alternating output voltage by means of sensor technology according to the applications of the motor and its current load. Servo converters can also have inputs for the angular position of the rotor and can be used as positioning drives. Thus, intermediate opening steps of a fluid flow adjustment apparatus in particular can be realized. Depending on the design, frequency converters can be supplied with single-phase alternating voltage, three-phase alternating voltage, or direct voltage, and generate three-phase alternating voltage from it for supplying three-phase motors. Frequency converters are in particular electronic devices without mechanically moving components.
According to one aspect, the connection can be designed and arranged in order to be automatically adjusted as a function of the respective operating states of the negative pressure systems, in particular to be fully or partially opened or closed. As a result, it is possible, in particular, to enable adjustment as a function of the operating state described above. The advantages and effects described above can thereby be realized. Reference is made here in particular to the comments relating to the fluid flow adjustment apparatus.
According to one aspect, the (fluidic) connection can be designed and arranged in order to adjust a fluid flow through a fluid flow adjustment apparatus, in particular in order to at least partially close it. Reference is made here in particular to the comments relating to the fluid flow adjustment apparatus, as described elsewhere. In particular, this results in the effects and advantages described elsewhere. For reasons of readability and compactness, such text passages are not repeated and reference is made to such passages.
According to an independent aspect, the object is achieved in particular by a method for allocating negative pressure. The method can comprise the step of an actuation of at least one fluid flow adjustment apparatus, in order to adjust a fluid flow between a first negative pressure system and a second negative pressure system, in particular in order to at least partially close a connection between a first negative pressure system and a second negative pressure system. Reference is made here in particular to the comments relating to the fluid flow adjustment apparatus and the control device, as described elsewhere. In particular, this results in the effects and advantages described elsewhere. For reasons of readability and compactness, such text passages are not repeated and reference is made to such passages.
According to an independent aspect, the object is achieved in particular by a control device as described elsewhere. The control device can be designed and configured in order to execute a method as described elsewhere. The control device can be arranged in a textile machine, as described elsewhere. There may also be embodiments in which the control device is designed to be external to the textile machine, in particular by adjusting the textile machine in a decentralized computing system, in particular in a cloud, as described elsewhere. Alternatively or additionally, the control device can be designed to be decentralized across the textile machine, for example in a manner distributed across a plurality of work stations. At least partially redundant “copies” of at least one control device can also be provided, for example at certain work stations.
The embodiments and aspects with the described features, effects and advantages of one category (apparatus, system, method) also describe in particular the embodiments and aspects of other categories (apparatus, 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.
In the following, exemplary embodiments of the invention are described in more detail with reference to figures, showing schematically and by way of example:
The same reference signs are used for elements and structures having the same effect and/or of the same type.
The textile machine 18 can comprise at least one first negative pressure point 11 for producing a thread. This first negative pressure point 11 can in particular be a spinning apparatus, in particular a spinneret. Thus, the first negative pressure point 11 is used in particular for spinning a thread.
The textile machine 18 can—additionally or alternatively—comprise at least one second negative pressure point 12 for sucking in the thread. This second negative pressure point 12 for sucking in the thread can comprise at least one suction nozzle for picking up an upper thread from a bobbin, in particular in the form of a cross-wound bobbin. Alternatively or additionally, the second negative pressure point 12 for sucking in the thread can comprise a thread storage nozzle for picking up a thread. Alternatively or additionally, the second negative pressure point 12 can comprise a working element that can be subjected to negative pressure. In particular, this working element can comprise a thread splicing apparatus that can be designed and arranged in order to unravel a thread end again after a thread breakage in order to enable renewed piecing.
The textile machine 18 comprises—additionally or alternatively—at least one first negative pressure system 1, which is designed and arranged in particular to be able to be brought into a fluidic connection 13 with the first negative pressure point 11. Alternatively, the first negative pressure system 1 can be designed and arranged in order to be in a fluidic connection 13 with the first negative pressure point 11, in particular permanently.
The textile machine 18 comprises—additionally or alternatively—at least one second negative pressure system 3, which is designed and arranged in particular to be able to be brought into a fluidic connection 14 with the second negative pressure point 12. Alternatively, the second negative pressure system 3 can be designed and arranged in order to be in a fluidic connection 14 with the second negative pressure point 12, in particular permanently.
The textile machine can selectively establish or interrupt a connection 15, 16, 17, in particular as a bypass connection, a cross-connection or a transverse connection, between the first negative pressure system 1 and the second negative pressure system 3 by means of a fluid flow adjustment apparatus 19.
As a result, the installed power of the first negative pressure source 2 can be kept within limits by selecting a fan of limited size for collecting upper threads. Resources can be saved in this way. Nevertheless, a higher number of simultaneous piecers (working elements or parts of a work station for piecing) can be ensured as active second negative pressure points 12 or active working elements for piecing a thread than the power of a second negative pressure source 4 alone could provide. As a result, a connection 15, 16, 17 can be designed in such a way that a fluidic connection between the two negative pressure systems can be adjusted. The connection 15, 16, 17 between the first negative pressure system 1 and the second negative pressure system 3 can be adjusted.
The second negative pressure point 12 for sucking in the thread has, in particular, a suction nozzle for picking up an upper thread from a bobbin, in particular from a cross-wound bobbin. This can be a thread storage nozzle for picking up a thread. Alternatively or additionally, it can be a working element that can be subjected to negative pressure, as described elsewhere.
The connection 15, 16, 17 between the first negative pressure system 1 and the second negative pressure system 3 can be adjusted in particular via at least one control device 5. Alternatively or additionally, the first negative pressure system 1 can be adjusted at least via a frequency converter 7. This frequency converter 7 is designed and configured in particular to control at least one negative pressure source 2, 4. For reasons of clarity, any cable connections (as a form of communication channel) are not shown here. Wireless applications are also possible.
The connection 15, 16, 17 is designed and arranged in particular in order to be adjusted automatically as a function of the respective operating states of the negative pressure systems 1, 3. This adjustment can be effected in particular by opening or closing the valve completely or partially.
The connection 15, 16, 17 is in particular 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. A fluid flow adjustment apparatus 19 can consist in particular of an adjustable valve, an adjustable slide valve and/or an adjustable bypass between the two (air-carrying) negative pressure channels (spinning channel and air channel for collecting upper threads and/or a pneumatic thread storage unit). Adjustment can be effected selectively via the correspondingly programmed machine controller or alternatively via one of the two frequency converters 7 that actuate the negative pressure sources 2, 4. For this purpose, the frequency converter 7 of the first negative pressure source 2 can communicate with the frequency converter 7 (not shown here as a separate apparatus for reasons of clarity) of the second negative pressure source 4. This additional regulation makes it possible to avoid installing additional power or correspondingly more powerful (or larger) negative pressure sources 2, 4, which would increase costs but would only be used occasionally, for example in the case of high requirements. For this reason, the resources required to set up a textile machine are reduced. In embodiments, the requirement for the negative pressure to be applied is particularly similar. As a result, a bypass connection with a basic fluid flow can also be kept permanently open in some embodiments.
The embodiments described here allow in particular that if, based on the requirement on the individual negative pressure systems 1, 3, one of the installed negative pressure sources 2, 4 (also called negative pressure drives) for the generation of negative pressure runs significantly below a power limit, the respective other negative pressure source 2, 4 can be supported with the use of a connection 15, 16, 17 between the negative pressure systems 1, 3 with a still available power reserve of one of the negative pressure sources 2, 4 of a first negative pressure system 1 or a second negative pressure system 3. For example, a number of simultaneous upper thread processes and/or simultaneous piecing processes could be additionally enabled, which the respective installed negative pressure source 4 could not guarantee alone for sucking in an upper thread (also referred to as upper thread handling) as long as the negative pressure source 2 still has power reserves for the spinning vacuum.
The allocation of negative pressure can be further improved, in particular by eliminating a complete separation between the two negative pressure systems 1, 3, by creating a connection 15, 16, 17 that can be set, in particular in the form of a bypass that can be set, between the two negative pressure systems 1, 3.
In particular, this connection 15, 16, 17 can be opened or closed fully or partially automatically as a function of the respective operating states of the negative pressure systems 1, 3. In particular, this can be effected in an adjustable manner, as described elsewhere.
“Can” in particular refers to optional features of the invention. Accordingly, there are also developments and/or exemplary embodiments of the invention which additionally or alternatively have the respective feature or the respective features.
From the combinations of features disclosed in the present case, isolated features can also be taken as needed and used by resolving a structural and/or functional relationship possibly existing between the features in combination with other features for delimiting the subject matter of the claim.
| Number | Date | Country | Kind |
|---|---|---|---|
| 504423 | Jun 2023 | LU | national |
