EP3266911A1 - Spinning preparation machine in the form of a line and method for operating the same - Google Patents

Abstract

The invention relates to a method for operating a spinning preparation machine in the form of a track (1), wherein the track (1) comprises a drafting system (2) with a plurality of successively arranged roller combinations, which are driven by one or more delay drives (6) to a the Drafting (2) during operation of the same passing fiber structure (7) to equalize, and wherein the distance (1) at least one auxiliary drive (8), which serves to drive one or more other movable components of the route (1). According to the invention, when the voltage of the voltage source (12) supplying the circuit (1) falls below a predefined limit, the auxiliary drive (8) is operated as a generator and thereby decelerated, whereby the additional drive (8) during the deceleration process due to the generator operation voltage used to drive the or the default drives (6) is used to equalize the the drafting system (2) even after the drop in the voltage supplied fiber strand (7). In addition, a spinning preparation machine is proposed, which has a control, by means of which the spinning preparation machine can be operated according to the inventive method.

Description

The present invention relates to a spinning preparation machine in the form of a track, the track having a drafting arrangement with a plurality of roller combinations arranged one behind the other, which are in operative connection with and can be driven by one or more delay drives to move the drafting device during operation thereof To homogenize fiber structure, and wherein the track comprises at least one auxiliary drive, which serves to drive one or more other moving components of the track.

In addition, a method for operating a spinning preparation machine in the form of a route is proposed, wherein the route comprises a drafting system with a plurality of successively arranged roller combinations, which are driven by one or more default drives to equalize the fiber structure passing through the drafting during operation thereof, and wherein the track comprises at least one auxiliary drive which serves to drive one or more further moving components of the track.

Generic stretching is known in the art (see eg. DE 10 2013 103 177 A1 ) and serve the stretching and thus the comparison of one of the route fed fiber composite, which in turn may comprise a plurality of fiber ribbons. The principle here is that thickness and / or mass fluctuations of the supplied fiber composite by a drafting upstream of the monitoring device (for example in the form of a Abtastscheibenpaars or a microwave resonator) be detected and compensated by regulating the speed of each or all drafting rollers of the drafting, in which the fiber structure when passing the drafting system more or less warped, ie pulled in the length is.

In principle, however, a defined distortion of the fiber composite is only possible as long as a voltage source (eg a public or private power network) connected to the line supplies the line with a voltage high enough to drive the line to operate at the desired speed.

If there is a voltage drop or drop, then a defined operation of the route is no longer possible. In this case, it is inevitable in the prior art that the route comes to an uncontrolled halt. The portion of the fiber strand that passes through the drafting system during this process must be subsequently removed, resulting in production losses.

The object of the present invention is therefore to propose a route or a method for operating the same, which counteract this disadvantage.

The object is achieved by a method and a spinning preparation machine in the form of a route with the features of the independent claims.

According to the invention, a method is proposed for operating a spinning preparation machine in the form of a line, wherein the delay and thus the equalization of the fiber bundle supplied to the line is basically by the specific choice or change the speeds of the drafting rollers of one or more of said roller combinations. A roller combination here comprises two or more with each other Corresponding drafting rollers that lead the fiber structure by clamping or transport through the drafting system.

The method is characterized by the fact that an auxiliary drive is present, which serves to drive one or more other moving components (and thus not the drafting rollers) of the track, the auxiliary drive then, when the voltage of the track supplying electrical energy to the track falls below a predetermined limit, is operated as a generator and is thereby decelerated. As will be explained in more detail later, the auxiliary drive is a drive (preferably an electric motor) which does not serve the drive of the roller combinations, but rather the drive of one or more further movable components of the track.

By the generator operation of this auxiliary drive, a voltage is generated which is used to even out the drafting system after the fall of the voltage supplied fiber structure. In other words, the auxiliary drive generates during a drop or fall of the voltage provided by the voltage source voltage below a defined limit itself, a voltage that is high enough to operate or the default drives the drafting at the desired speed. The route therefore remains operational.

In particular, it is advantageous for the line to comprise a depositing device for the fiber structure leaving the drafting system during its operation, the depositing device preferably comprising a storage tray driven by means of the additional drive. When turning the storage tray of the storage tray passing and guided by this fiber structure is placed in a tray arranged below the tray (preferably a can, as is commonly used in spinning mills). Furthermore, the storage device may have a Kannendrehteller, with the help of the tray also in a rotary or other Movement can be offset. Advantageously, the can turntable with the auxiliary drive in operative connection and is driven by this.

In particular, when the tray is already filled to some extent with the fiber structure, the inertia of the storage device is relatively high, so that the storage device driving auxiliary drive can be operated at a voltage drop or drop comparatively long in the generator mode before it to a standstill comes.

Preferably, the auxiliary drive is operated in the generator mode until it comes to a standstill or until the voltage provided by the voltage source again rises above a defined minimum voltage. Finally, the auxiliary drive or alternatively the or one of the default drives ultimately also serves to drive a withdrawal device (eg a pair of withdrawal rollers) with the aid of which the fiber structure leaving the drafting arrangement is clamped before it comes into contact with said deposit plate.

It is also advantageous if the drafting system is designed and operated as a regulated drafting system. For this purpose, it preferably comprises at least a first roller combination, a second roller combination and a third roller combination. Between the first roller combination and the second roller combination, the fiber structure is pre-drawn, while between the second roller combination and the third roller combination of the main distortion of the fiber structure takes place. To correct mass and / or thickness variations of the fiber composite, the speeds of individual or all drafting rollers of the individual roller combinations are seen over time accelerated or slowed down so that the thick places or bodies with increased mass of the fiber composite when passing the drafting system warped more (ie pulled apart) are considered as portions of the fiber composite with lesser length related Mass or thickness. In particular, it is possible to realize the said leveling exclusively in the default field or exclusively in the main default field, the remaining default field is operated in these cases with constant delay.

In any case, it is advantageous if, during operation of the route, at least one measured variable dependent on the thickness of the fiber bundle entering the first roller combination is detected, wherein the rotational speed of the drafting roller of at least one of the mentioned roller combinations is regulated on the basis of the measured variable.

Furthermore, it is advantageous if the drafting system is operated with respect to the described regulation during the deceleration process of the auxiliary drive as well as during normal operation of the route, during which the amount of voltage provided by the voltage source corresponds to a desired value or is above a threshold value, from which the auxiliary drive is operated as a generator. This ensures that the entire fiber bundle warped during the deceleration process of the auxiliary drive has a uniformity that corresponds to the uniformity during said normal operation.

In other words, during the deceleration process, therefore, the route is operated in exactly the same way as during normal operation, with the exception that the voltage for the operation of the deceleration drive (s) is supplied by the auxiliary drive, which is operated as a generator at this stage. Of course, the speed level of the individual drafting rollers at this stage may be lower than during normal operation. In any case, however, the regulation of the drafting rollers should also be done during the braking process of the auxiliary drive in such a way that the route leaves a uniform fiber structure.

The first and the second roller combination are preferably in operative connection with a first drafting drive and the third roller combination with a second drafting drive. As a result, preferably all or part of the drafting rollers of the first and second roller combinations are driven by the first drafting drive and all or part of the drafting rollers of the third roller combination by means of the second drafting drive.

It also brings benefits when the route includes a controller, wherein the voltage generated by the regenerative auxiliary drive during the braking process is also used to operate the controller. Preferably, all components of the route with the exception of the auxiliary drive are supplied with the voltage generated by the auxiliary drive during the braking process, so that the route can be operated as in normal operation until the auxiliary drive provides sufficient voltage more. Alternatively, the course can of course also have a battery, which preferably supplies the controller with the necessary energy when the voltage that provides the voltage source is no longer sufficient for a corresponding power supply.

It is advantageous if the voltage generated by the generator-operated auxiliary drive during the deceleration process is provided to one or more further spinning preparation machines and / or one or more spinning machines, or generally one or more power consumers.

The voltage generated by the auxiliary drive can thus be used not only for the operation of the track, but also for the operation of other machines that do not have a generator-operable drive itself. For this purpose, the route is connected via appropriate power lines with a spinning power network or directly to one or more other machines. Of course, should always from the auxiliary drive only so much voltage is delivered to other machines that the track itself can still be operated as in normal operation.

In general, it should be noted at this point that the statement that the drafting system is operated during the braking operation in "normal operation" does not necessarily mean that the speeds of the drafting rollers must be at the same level as in normal operation. It is also conceivable that all drafting rollers are operated at a reduced speed level during the braking process, while maintaining the regulation described above.

It has particular advantages when the auxiliary drive is again used exclusively as a drive when the voltage of the voltage source supplying the path with electrical energy rises again above a predetermined limit value. The speed of the auxiliary drive can be increased in this case, for example, stepwise or continuously back to its rated speed. Further, it is advantageous if in this case, the or the default drives are supplied with voltage again by means of the voltage source, so that the route can return to their normal operation.

Furthermore, it is advantageous if the auxiliary drive is automatically accelerated to a rated speed with the aid of the voltage source when the voltage rises again above a predetermined limit value after a voltage drop.

Furthermore, it is advantageous if the acceleration occurs only when the speed of the auxiliary drive during the previous braking operation has not fallen to zero or below a defined minimum speed. In this case, it is advantageous if the route can only be put back into normal operation manually. This excludes that the route suddenly and unexpectedly starts up again after a longer standstill. A risk to personnel is thereby avoided.

It is also advantageous if the amount of the voltage available to the track is monitored at least during the deceleration process, wherein a distinction is made as to whether the voltage originates from the generator-operated auxiliary drive or from the voltage source. This prevents the controller from erroneously assuming, due to the voltage supplied by the auxiliary drive, that the voltage of the voltage supply has again risen above the stated limit, although this is not the case in reality. Preferably, the voltage of the voltage source and the voltage supplied by the auxiliary drive is monitored by two separate voltage measuring devices.

Finally, the spinning preparation machine according to the invention in the form of a route is characterized by the fact that it has a device for monitoring the voltage provided by a voltage source connected to the route. Furthermore, it comprises a controller which is designed to operate the route according to the previous and / or following description. Incidentally, the physical features of the route described so far or described below can be implemented in any combination, provided that this does not contradict the independent patent claims.

Particular advantages it brings when the drafting system has at least a first roller combination, a second roller combination and a third roller combination, wherein between the first roller combination and the second roller combination, a pre-distortion of the drafting system during its operation supplied fiber strand takes place, and wherein between the second Roller combination and the third roller combination is a major delay of the fiber association takes place. As a result, a route is created in which during operation of the drafting system at least one of the thickness of the incoming in the first combination of rollers fiber association measured variable can be detected.

On the basis of the measured variable, finally, the rotational speed of the rollers of at least one of said roller combinations is regulated, reference being made in this connection to the regulation described above.

It is also advantageous if the device for monitoring the voltage is designed to monitor the voltage of the voltage source as well as the voltage generated by the auxiliary drive during the braking process individually. For example, both the voltage source or the current input connected to the voltage source of the track and the auxiliary drive could be assigned a separate voltmeter, the individual voltmeter should in turn be connected to the control of the track.

It is also advantageous if the route comprises a storage device for the drafting system leaving the operation during its operation, wherein the auxiliary drive is used to drive the storage device and for this is in operative connection with this. The storage device preferably comprises a storage tray already described above and a can turntable, the latter components should be in operative connection with the auxiliary drive.

Likewise, it is advantageous if the auxiliary drive via at least one electrical DC link (= electrical device that electrically couples a plurality of electrical networks on an intermediate power or voltage level via inverter) with the at least one drafting drive and / or one or more not to the line associated electricity consumers (eg one or more further spinning preparation machines and / or one or more spinning machines) Connection stands. The voltage generated by the additional drive can be passed in this way particularly easy to the respective voltage-consuming components.

Figur 1

eine Seitenansicht ausgewählter Komponenten einer erfindungsgemäßen Spinnereivorbereitungsmaschine.

Further advantages of the invention are described in the following embodiment. It shows schematically:

FIG. 1

a side view of selected components of a spinning preparation machine according to the invention.

FIG. 1 shows a spinning preparation machine in the form of a distance 1, which serves for the homogenization of a fiber composite 7, for example, comes from an upstream card.

The route 1 comprises a drafting system 2 (of which, incidentally, several may also be present) which comprises at least one first roller combination 3, a second roller combination 4 and a third roller combination 5. Each of the mentioned roller combinations 3, 4, 5 in turn comprises at least two cooperating drafting rollers 16, of which at least one is driven by means of a delay drive 6 (in the figure, for reasons of clarity, only one of a plurality of drafting rollers 16 shown identically is provided with a reference numeral). ,

While the first roller combination 3 and the second roller combination 4 form a so-called default draft field, the second roller combination 4 and the third roller combination 5 form the so-called main drafting zone.

• Der in die Strecke 1 eingeführte Faserverband 7 (der aus mehreren Faserbändern bestehen kann) wird im Bereich des Streckeneingangs mit Hilfe eines Sensors hinsichtlich längenbezogener Dicken- oder Masseschwankungen oder der absoluten längenbezogenen Dicke bzw. Masse überwacht. Hierzu können beispielsweise die gezeigten Abtastscheiben 15 zum Einsatz kommen. Ebenso ist selbstverständlich auch der Einsatz eines Mikrowellenresonators denkbar (nicht gezeigt).

The mode of action of route 1 is now the following:

• The introduced in the route 1 Fiber Association 7 (which may consist of several slivers) is in the range of the line input by means of a sensor in terms of length-related thickness or mass variations or the absolute length-related thickness or mass monitored. For this purpose, for example, the scanning disks 15 shown can be used. Likewise, of course, the use of a microwave resonator is conceivable (not shown).

Depending on the length-related mass and / or thickness of the fiber composite 7 single or more of the drafting rollers 16 are now accelerated or decelerated, so that the thick places or bodies with increased mass in the drafting 2 more warped than the other sections of the fiber composite 7. Der Fiber composite 7 is thereby made uniform.

After leaving the drafting system 2, the fiber structure 7 passes by means of a storage device 9 in a tray, which is usually formed by a can 10. The storage device 9 preferably comprises a can turntable 18 and a storage tray 17, wherein the two last-mentioned components by means of an additional drive 8 are set into a rotational movement to the fiber structure 7 loop-shaped deposit in the can 10 can. The fiber structure 7 can be guided in particular by a withdrawal roller pair 19, which is preferably driven by means of one of the two default drives 6, between the drafting system 2 and the storage tray 17 (wherein the take-off roller pair 19 is not absolutely necessary).

Furthermore, the figure shows that the default drives 6 and the auxiliary drive 8 (both are preferably realized by electric motors) are connected via power lines 20 to a power connection 14, which in turn is connected to a voltage source 12.

In addition, the distance 1 to a controller 11, with the help of which, among other things, the speed of the default drives 6 and the auxiliary drive 8 are controlled.

Finally, the route 1 has one or more devices 13 for monitoring the voltage provided by a voltage source 12 connected to the route 1.

If the controller 11 now determines that the said voltage falls below a previously defined limit value or even drops to zero, the auxiliary drive 8 now serves as the voltage source 12 according to the invention.

For this purpose, the auxiliary motor during a deceleration of the same is used as a generator. The voltage generated thereby (which in the example shown is also monitored by the above-mentioned device 13 with which the voltage provided by the voltage source 12 is also monitored) can finally be used to apply the delay drives 6 and also the controller 11 to the supply electrical energy that is necessary to the distance 1, in particular their drafting system 2, continue to operate and with prolonged power failure (or prolonged undervoltage) of the power source 12 controlled down to a standstill. The fiber structure 7 is just as uniform during this phase as during normal operation, during which the voltage of the voltage source 12 corresponds to the desired value.

Of course, the conveying speed of the drafting system 2 may be lower during the braking operation of the auxiliary drive 8 compared to the normal operation, since the drafting rollers 16 should be gradually throttled to zero during the deceleration process. The general mode of operation of the drafting system 2, d. H. the uniform effect on the fiber structure 7, but should remain the same throughout the operation of the route 1.

The present invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are possible as well as any combination of the described Features, even if they are shown and described in different parts of the description or the claims or in different embodiments.

LIST OF REFERENCE NUMBERS

1

route

2

drafting system

3

first roller combination

4

second roller combination

5

third roller combination

6

default drive

7

fiber structure

8th

accessory drive

9

storage device

10

pot

11

control

12

voltage source

13

Device for monitoring the voltage provided by a voltage source connected to the track

14

power connection

15

scanning disc

16

Drafting system roller

17

coiler plate

18

Can turntable

19

Off rollers

20

power line

Claims (13)

Method for operating a spinning preparation machine in the form of a route (1), - wherein the track (1) comprises a drafting system (2) with a plurality of successively arranged roller combinations which are driven by one or more delay drives (6) in order to equalize a drafting device (2) during operation of the same fiber strand (7), and - wherein the track (1) comprises at least one auxiliary drive (8) which serves to drive one or more further movable components of the track (1), characterized
that the auxiliary drive (8) when the voltage of the line (1) supplied with electrical energy supply voltage source (12) falls below a predetermined limit is operated as a generator and thereby braked, wherein the auxiliary drive (8) during the deceleration process due to Generator operation generated voltage to drive the or the default drives (6) is used to even the drafting system (2) after the fall of the voltage supplied fiber structure (7) to equalize. Method according to the preceding claim, characterized in that the track (1) comprises a depositing device (9) for the drafting unit (2) leaving the fiber assembly (7) during its operation, wherein the depositing device (9) is driven by the auxiliary drive (8) in order to deposit the fiber structure (7) leaving the drafting system (2) into a receptacle, preferably a can (10). Method according to one of the preceding claims, characterized in that the drafting arrangement (2) has at least one first roller combination (3), a second roller combination (4) and a third roller combination (5), wherein between the first roller combination (3) and the second roller combination (3) Roller combination (4) is a Vorverzug the drafting (2) during its operation supplied fiber composite (7), wherein between the second roller combination (4) and the third roller combination (5), a major delay of the fiber assembly (7), wherein during operation the distance (1) at least one of the thickness of the in the first roller combination (3) incoming fiber association (7) dependent measured variable is detected, based on the measured variable, the rotational speed of the drafting rollers (16) is regulated at least one of said roller combinations, and the degree of regulation is maintained even after the voltage has dropped, at least for a while will be. Method according to one of the preceding claims, characterized in that the route (1) comprises a controller (11), whereby the voltage generated by the generator-operated auxiliary drive (8) during the deceleration operation is also used to operate the controller (11). Method according to one of the preceding claims, characterized in that the voltage generated by the regenerative auxiliary drive (8) during the deceleration process is provided to one or more further spinning preparation machines and / or one or more spinning machines. Method according to one of the preceding claims, characterized in that the auxiliary drive (8), when the voltage of the line (1) supplying electrical energy source (12) again rises above a predetermined limit, is again used exclusively as a drive, and that in this case, the or the default drives (6) are supplied with voltage again by means of the voltage source (12). Method according to one of the preceding claims, characterized in that the auxiliary drive (8) with the aid of the voltage source (12) is automatically accelerated to a rated speed when the voltage rises again after a voltage drop above a predetermined limit, the acceleration takes place only when the speed of the auxiliary drive (8) during the previous deceleration process has not fallen to zero or below a defined minimum speed. Method according to one of the preceding claims, characterized in that the voltage of the track (1) available voltage is monitored at least during the deceleration process, wherein it is discriminated whether the voltage from the regenerative auxiliary drive (8) or from the voltage source ( 12). Spinning preparation machine in the form of a line (1), - The route (1) comprises a drafting system (2) with a plurality of successively arranged roller combinations, which are in operative connection with one or more default drives (6) and are driven by this or these, the drafting system (2) during operation of the same passing fiber structure (7), and - wherein the track (1) comprises at least one auxiliary drive (8) which serves to drive one or more further movable components of the track (1), characterized
in that the track (1) has a device (13) for monitoring the voltage provided by a voltage source (12) connected to the track (1), and in that the track (1) comprises a control (11) is designed to operate the route (1) according to one of the preceding claims. Spinning preparation machine according to the preceding claim, characterized in that the drafting device (2) has at least one first roller combination (3), a second roller combination (4) and a third roller combination (5), wherein between the first roller combination (3) and the second roller combination (4) a pre-delay of the drafting unit (2) during its operation supplied fiber assembly (7), wherein between the second roller combination (4) and the third roller combination (5) is a major delay of the fiber composite (7), wherein during operation of the Distance (1) at least one of the thickness of the in the first roller combination (3) incoming fiber association (7) dependent measured variable is detected, and wherein based on the measured variable, the rotational speed of the drafting rollers (16) of at least one of said roller combinations is regulated. Spinning preparation machine according to claim 9 or 10, characterized in that the device (13) is designed to monitor the voltage to monitor the voltage of the voltage source (12) and the voltage generated by the auxiliary drive (8) during its braking process individually. Spinning preparation machine according to one of claims 9 to 11, characterized in that the route (1) comprises a depositing device (9) for the drafting system (2) during its operation leaving fiber structure (7), wherein the auxiliary drive (8) Drive the storage device (9) and this is in operative connection with this. Spinning preparation machine according to one of claims 9 to 12, characterized in that the auxiliary drive (8) via at least one electrical intermediate circuit with the at least one drafting drive (6) and / or one or more further spinning preparation machines and / or one or more spinning machines in combination.

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