CN100445443C

CN100445443C - Spinning machines

Info

Publication number: CN100445443C
Application number: CNB021561753A
Authority: CN
Inventors: T·施瓦布; R·布兰德
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2001-12-14
Filing date: 2002-12-13
Publication date: 2008-12-24
Anticipated expiration: 2022-12-13
Also published as: JP2003201631A; ITMI20022613A1; DE10161522A1; CN1424447A

Abstract

A spinning machine, and especially a ring spinner, has at least having at least one driving device for controlling by frequency modulator or frequency transformer, and a central control unit for controlling frequency modulator. The central control unit is also provided with a starting unit, through which the predraft mount of the drafting unit can be changed. The said drafting unit comprises rolla pairs, each pairs of rolla including press rolla pressed on the lower drum for driving the lower drum, mounted on each filature together. Each rolla mounted under continuous rolla pairs (w, w1 and w2) is as the lower drum (w, w1 and w2), fibre materials (110) can be predrafted between rolla pairs (w) and rolla pairs (w1). Lower rolla (w1) in the middle can be drived faster or slower, while the circumferential speed of the rest rolla or rolla pairs (w qnd w2) can be invariable, in order to chang the predraft mount of the drafting unit. The circumferential speed of Rolla (w1) can be changed in order to improve the performance of the drafting unit between rolla pairs (w and w1)to the most, the drafting force of the predraft area which is between rolla pairs (w and w1) in the chang area is relatively most to obtain even main drafting between rolla pairs (w1 and w2).

Description

The method of operating of a kind of fine spining machine and fine spining machine

Invention field

The present invention relates to a kind of fine spining machine, especially a kind of ring throstle, its drafting unit has at least one driver that is used for the drafting unit cylinder, described driver is by speed regulator, especially frequency modulator or frequency converter are controlled, and monitor described speed regulator or frequency modulator by the centralized control unit of machine.Also relate to drive unit, relate to the drive unit of any fine spining machine in principle.

Background technology

When processing fiber material under given conditions occasionally quality problems can take place.Until now not knowing what generation really in the preliminary draft district during spun yarn.Particularly unclear whether rectangular experience drawing-off or only be stretched.In addition, do not know for the expert whether the preliminary draft district needs fully.For this reason, do not pay close attention to the problem of preliminary draft fully.The result ignores the preliminary draft process often selectively to set up and the defective that has of therefore producing.

About this point, importantly consider the torsion or the torque course of bottom roll during spun yarn.Torsion takes place in long fine spining machine especially, because physical property, bottom roll is turned round maximum amount at the free axis place in contrast to cylinder drive.

Summary of the invention

Thus, the objective of the invention is to propose the fine spining machine and the method for a kind of front stated type, especially a kind of ring throstle, its drafting unit has at least one driver that is used for the drafting unit cylinder, described driver is by speed regulator, especially frequency modulator or frequency converter are controlled, and monitor described speed regulator or frequency modulator by the centralized control unit of machine.Can guarantee favourable condition of work with simple, yet reliable method by paying close attention to the preliminary draft process, thus the quality problems when having eliminated the processing fiber material.

This task is to realize by the fine spining machine of following each feature.The discovery that the present invention is based on is: set up preliminary draft in having the right drafting unit of three rollers, a main drawing area, special, even when drafting force is maximum in the preliminary draft district, dominant draft the first and the 3rd roller between carry out, therefore first and second rollers between.Therefore, fine spining machine according to the present invention has control module, and it can regulate the optimum value of preliminary draft and the optimum value of therefore also regulating whole drawing-off automatically with controlling.

Fine spining machine is promptly proposed, have: drafting unit, have the driver that at least one is used for the drafting unit cylinder, described driver is controlled by speed regulator, and monitor described speed regulator by the centralized control unit of machine, it is characterized in that: in order to regulate and the optimization yarn qualities, the centralized control unit of described fine spining machine has been set up start unit, measuring unit, memory cell, data processor and setpoint cell, whereby, the preliminary draft amount of described drafting unit can change.

Described drafting unit comprises that first, second, third roller is right, each roller is to all being made up of the pressure roller that drives bottom roll and be pressed in above it, thereby corresponding roller is to being arranged in each spinning position, these right bottom rollers of roller that are provided with continuously all are called bottom roll, the preliminary draft of fibrous material described first roller pair and described second roller between carry out.

Provide the mechanism of the preliminary draft amount that is used to change described drafting unit, thereby the right bottom roll of second roller can drive slowlyer or more hurry up, and described first roller is to remaining unchanged with the right peripheral speed of the 3rd roller.

The mechanism that is used to change the preliminary draft amount is provided, thereby the peripheral speed of the bottom roll that first roller is right is variable, and the peripheral speed of the right bottom roll of described the 3rd roller also changes with same ratio, the whole drawing-off amount of described drafting unit is remained unchanged, and the speed constant proportion can regulate spindle driver and described the 3rd roller is right.

Centralized control unit is designed to adjust the optimum value of preliminary draft amount by changing preliminary draft amount and dominant draft rate, thereby all the drawing-off amount becomes invariable.

The velocity variations of the bottom roll that described second roller is right can be by such realization, be that the right bottom roll of described second roller comprises independent electric drive, be provided with several parallel right bottom rolls of second roller, the right bottom roll of each described second roller is provided with a drafting unit electric drive, thus, be provided with the drafting unit electric drive of respective numbers, be used to drive described second roller to or described the 3rd roller of respective numbers right, and described first roller has been equipped with electric drive to self.

In the described drafting unit driver, only be equipped with a power supply and supplied with the right right bottom roll of roller of described first and second rollers, and between described drafting unit electric drive and gear chain, be provided with speed changer, described gear chain extends to the right bottom roll of described first and second rollers from speed changer, thus, in order to change rotating speed and the driveability that extends to the described gear chain of the right bottom roll of described second roller from speed changer, on described speed changer, be provided with and have the change-speed gearing of controlling driver, thus the control driver of change-speed gearing is coupled with controllable way and described control module or with the described start unit of described control module.

The right bottom roll of second roller has been equipped with independent drafting unit electric drive, need adopt frequency modulator or frequency converter thus, described frequency modulator or frequency converter are connected with described drafting unit electric drive, correspondingly, are provided with other frequency modulator and are used for other driver.

For the optimization preliminary draft, should carry out the basic adjusting of described Spinning Machine Control unit, the scope of described basic adjusting is to determine that by each input value in the service module value of described basic adjustment comprises parameter, N is as the rotating speed of spinning position spindle, and described spinning position is equipped with spindle driver; In addition, n, n1 and n2 are as first, second and the right rotating speed of the 3rd roller; The revolution change procedure that N (t) changes as the revolution process at the time durations of cop stroke of spindle.

Be used for the physical unit that the necessary measuring unit of optimization preliminary draft amount, memory, data processor and setpoint cell can be used as start unit, the perhaps measuring unit of being mentioned, memory, data processor and the setpoint cell start unit or the centralized control unit that are stored in machine as the routine or worker's element to the small part of EDP program can adopt routine to handle during carrying out optimization procedures together with the central electronic data processing and control program of the centralized control unit of machine thus.

Fine spining machine is a kind of ring throstle.

Speed regulator is frequency modulator or frequency converter.

Also propose to be used for the method for operating of above fine spining machine, it is characterized in that: change the described second roller peripheral speed and be for described first and second rollers between the output of drafting unit bring up at utmost, can described first and second rollers between obtain dominant draft very uniformly, drafting force in the preliminary draft district is relatively the highest thus, that is, in variation zone described first and second rollers between drafting force be the highest relatively.

Determine to cross over described roller between can be apart from the maximum drafting power in the preliminary draft district of S by such mode, when the rapid change of described drafting unit driver, measure the interior amperage I of driver of the right bottom roll of described second roller.

After the input operation parameter, the startup stage that described fine spining machine being in, in this stage, described start unit is in higher level, make its performance bring up to high as far as possible level in order to control described drafting unit driver, change with regard to being the amperage of described drafting unit electric drive is brought up to maximum.

Amperage I in described driver or the frequency modulator is measured and is recorded in the determination unit.

The value of being measured by measuring unit or determination unit can be sent to memory, by the data processor that is connected with described memory, the value of the amperage I of timely continuous measurement can be compared mutually, startup rotating speed for described drafting unit driver, can select an only a little higher than drafting unit driver rotating speed speed and suppose that roller diameter is identical, like this to be in described first and second rollers between fibrous material have only very little preliminary draft.

The commentaries on classics of the bottom roll that second roller is right is turned round, and writes down and assesses in determination unit by initiator.

The value of being measured by measuring unit or determination unit can be sent to memory, by the data processor that is connected with described memory, the value of the corner of bottom roll that can the amperage I of timely continuous measurement and described second roller is right compares mutually, startup rotating speed for described drafting unit driver, can select an only a little higher than drafting unit driver rotating speed speed and have identical roller diameter, like this to be in described first and second rollers between fibrous material have only very little preliminary draft.

If in the N time is measured, amperage I (N) is greater than amperage I (N-1), performance improves to be expected to improve by rotating speed and realizes in the so described drafting unit driver, and the preset value of rotation speed n 1 can increase difference n ', so the new speed desired value of described drafting unit driver sends to setpoint cell from described data processor, then be sent to the centralized control unit of described machine again or directly be sent to set-value adjuster, the result is, power frequency in the described frequency modulator has increased desired value, described drafting unit driver moves with high rotational speed, causes the further raising of preliminary draft ratio thus.

The amperage I that is measured by current measuring unit feeds back to measuring unit, compare with the amperage that had before recorded, then new measured value I is sent to memory and handle by described data processor, because the result of difference I (N+1)-I (N) remain on the occasion of, so further increase desired value n1 and the centralized control unit by described machine sends new desired value to described frequency modulator by the setpoint cell that is connected.

The rotating speed of described drafting unit electric drive divides some ranks to improve, all will be abreast or measure the corner α of the right bottom roll of the amperage I of described drafting unit electric drive and described second roller alternately in each rank.

Described initiator senses the mark on the right bottom roll of described second roller, at time point t1 measuring-signal is sent to described measuring unit, because the load of the bottom roll that described second roller is right has caused torque, then be recorded in initiator attached to being marked at after a while on the right bottom roll of described second roller on the time t2 with the same manner, time difference, (t2-t1) sent described data processor to via described memory, handle by transient speed n1 the described second drawing-off cylinder, determined the torque between two initiators, thus, corner is proportional to the product of transient speed and time difference (t2-t1).

For the optimization preliminary draft, measure the corner (α) of the right bottom roll part of described second roller, so that provide the indication of the level relatively of the right bottom roll performance of described second roller, perhaps, during the preliminary draft amount of the right bottom roll of described second roller is carried out optimization procedure, simultaneously or measure the torque α of the right bottom roll of the amperage I of the right following driver of second roller and roller abreast, with in order to be no more than the maximum limit value that allows torque α of the right bottom roll of described second roller.

During the rotating speed of the right bottom roll of the rotation speed n 1 that improves described driver gradually and described second roller, described data processor is also measured the corner α=α n1 (t2-t1)/30 that increases gradually, and compare with maximum permissible value, along with improving constantly of rotation speed n 1, when promptly arriving the limit value of the maximum permission of the right bottom roll of described roller torque α, just stop optimization procedure, like this in the optimization that before the described maximum current I consumption that reaches the drafting unit electric drive, finishes the preliminary draft ratio.

Exceed optimum value if ignored the torque and the improving constantly of preliminary draft ratio of the right bottom roll of described roller, the amperage of described drafting unit driver or power input can descend once more, like this, if the difference between two amperage I (the N+x)-I (N+x1) of (N+x) suboptimization step becomes zero maybe will become negative the time, described data processor can determine the optimum value of preliminary draft amount.

When reaching optimum speed (n1+xn '), described optimum speed is that described data processor is determined by recording numerical value respectively more continuously, the rotating speed of determined target (n1+xn ') is taken as clear and definite desired value, the adjusting of fine spining machine input or that select before being used for, described adjustment is finished by described service module, and be used for from now on spinning process by described setpoint cell, thus, optimum speed behind x iterative step of process (n1+xn ') stop, on described service module, be indicated as the empirical value that can be used as yarn batch process from now on, can also preserve by means of described data processor, in addition, can determine that optimized preliminary draft value vo is the right new rotating speed of described second roller and the ratio of the right new rotating speed of described first roller.

During carrying out optimization preliminary draft ratio, under the situation that is lower than the maximum possible drafting force, operate, can be than surpassing the little of best draw ratio because be brought down below best draw ratio to the adverse effect that yarn qualities produced, thus, what be of practical significance is that the preliminary draft value is chosen in the 70-90% scope of best preliminary draft value, adopt so best preliminary draft value, the input of the power of the electric drive of the bottom roll that described second roller is right becomes and is peak.

Relate to optimization preliminary draft amount, also want described first roller to and second roller between distance, for this reason, during described distance of optimization and while optimization preliminary draft speed, in the whole length of crossing over distance, reduce the tension force of fibrous material, and yarn qualities is not had a negative impact, in the scope of determining between 50 millimeters to 90 millimeters, particularly distance is defined as 75 millimeters.

Description of drawings

Below with reference to accompanying drawings and by the mode of exemplary embodiment the present invention is done more detailed introduction.Accompanying drawing has:

Fig. 1 is the partial view of schematically simplifying, and shows a preferred embodiment of ring throstle, the power distribution of machine as we can see from the figure;

Fig. 2 is that the ring throstle of Fig. 1 is schematically simplified local figure, is arranged on centralized control unit, the frequency modulator of machine as we can see from the figure and is used for signal line between the relay of direction of rotation;

The schematic diagram of Fig. 2 a drafting unit controlling organization;

The enlarged diagram of Fig. 3 relay, relay are arranged between the centralized control unit and corresponding frequency modulator of ring throstle, and described relay is used to change direction of rotation; With

The change procedure of Fig. 4 drafting unit cylinder moment of torsion under different condition;

Fig. 5 has shown the current strength of the drafting unit driver that changes with draw ratio and cylinder moment of torsion change procedure qualitatively.

List of reference numerals

10 ring throstles, 11 numerical controls outlet

12 spinning stations or spindle driver 13 conversion contactors

14 drafting unit electric drive 14a determination units

14b determination unit 15 start-up circuits

16 drafting unit electric drive 16a drafting unit cylinders

18 ring rail electric drive 20 frequency modulators or frequency converters

22 frequency modulators or frequency converter 24 frequency modulators or frequency converter

26 frequency modulators or frequency converter 28 centralized control units

28a start unit 29 control inlets

30 control inlets, 31 relays

32 coils, 33 recovery diodes

34 intermediate circuit 36DC/DC converters

38 acceptance filters, 40 transformers, pressure reducer

42 service modules, 44 data links

46 set point adjustment devices, 48 data links

50 data links, 60 measuring units

60a current measuring unit 60b, the c initiator

62 memory cell, 64 data processors

66 setpoint cell, 115 speed changers

The change-speed gearing of 115a tape controller

The specific embodiment

With reference to figure 2a, fibre bundle 110 passes a pair of roller w, by the preliminary draft district, arrives first couple of roller w1, further enters down a pair of roller w2, and this fibre bundle 110 is sent to twist yarn and yarn winding device then.W1 and roller are provided with guide bridge 118 between to w2 and towards the dust cage 116 of guide bridge at roller, dust cage 116 ends of w2 are stretched into guide bridge 118 and roller to the space between the w2 towards roller.Each roller of first couple of roller w1 is surrounded by tail band 114 and/or heading tape 112, and this two band is also crossed (only local display) guide bridge 118 and/or dust cage 116.This two strap is an endless, by roller w1 is driven, and can be sent to roller to fibre bundle 110 to w2 from roller to w1 like this.For the sake of clarity, guide bridge 118 is adhered to the tail band 114 of guide bridge, and dust cage 116 and heading tape 112, also have roller to w1 and w2 the display mode on figure be make be with 114,112 and fibre bundle 110 and/or roller the roller of w1 and w2 is all left enough distances each other.And in the fine spining machine drafting unit of reality, the distance between roller w1, w2 and the belt 114,112 should make fibre bundle 110 clamp, fiber that thus can drawing of fiber bundle 110.

Shown in the schematic partial view of the ring throstle 10 of Fig. 1 and Fig. 2, ring throstle comprises the electric drive of a spinning station or spindle 12 at least, the

electric drive

14,16 of drafting unit, and at least one annular electro bogie promptly encircles rail electric drive 18, and these devices are that frequency converter 20-26 controls by frequency modulator.Different frequency modulator 20-26 can control by the centralized control unit 28 of ring throstle 10.

Drafting unit driver 14 by frequency modulator 22 controls is used to import cylinder and intermediate calender rolls, and the drafting unit driver 16 of frequency modulator 24 controls is used for output roller.In the present embodiment, be provided with 8

drafting unit drivers

14,16 altogether.

Frequency modulator 20 is to be used for controlling spindle driver 12 to carry out the rotation of direction, and to twisting, and control spindle driver 12 carries out opposite spin corresponding to the Z of yarn, corresponding to the S of yarn to twisting.For this reason, frequency modulator 20 has two

independent controls inlets

29,30, and by relay 31 control (specifically referring to Fig. 2 and Fig. 3) that hockets, described control module is corresponding with two opposite direction of rotation.

A recovery diode 33 is parallel to the coil 32 of relay 31.

Relay 31 is controlled by the numerical control outlet 11 of machine center control module 28.

In this exemplary embodiment, relay 31 comprises a conversion contactor 13, and two

control inlet

29,30 cooperatings with frequency modulator 20 preferably are arranged on it start-up circuit 15 that is used for frequency modulator 20.

Each direction of rotation can with service module 42 that machine center control module 28 is connected on pre-determine (see figure 2).The preset value of corresponding direction of rotation can be set by relevant parametersization.

For the direction of rotation reversing of spindle driver 12, the centralized control unit 28 of machine preferably is arranged to carry out of short duration stopping.

Can be equipped with signal or indication that the proper device (not shown) sends the direction of rotation reversing.Signal or indicating device can by, for example, the centralized control unit 28 of machine triggers.

As can be seen from Figure 1, the frequency modulator 22-26 that is used for drafting

unit driver

14,16 and ring rail electric drive 18 is by shared intermediate circuit 34 feeds, and this circuit can apply DC voltage by at least one frequency modulator 20 that is used at least one or more spindle drivers 12.Centralized control unit 28 is intermediate circuit 32 feeds thus also, and described central control unit is connected to intermediate circuit 34 by DC to DC converter 36.By this converter 36, the High Level DC Voltage of the intermediate circuit 34 of feeding is reduced to than low value, for example 24 volts.

Acceptance filter 38 and transformer or the pressure reducer 40 of the frequency modulator 20 that is used for spindle driver 12 by supply voltage adjustment usefulness is connected to 3 circuitry phases.

The service module of having mentioned above Fig. 2 demonstrates 42 is connected with the centralized control unit 28 of machine.

Between the centralized control unit 28 of machine and

frequency modulator

20,26, a data link 44 is arranged, and a desired value adjuster 46 (carefully referring to Fig. 2), in this exemplary embodiment, frequency modulator 26 is given in configuration.In addition, also have one to carry out the FU internal data transfer device 50 (FU is the frequency converter assembly that comprises frequency modulator) that FU internal data transfer device 48 that drawing-off uses and use for drafting unit synchronous operation for drafting unit.

In addition, in this exemplary embodiment, also dispose electronics drafting unit speed changer.For this reason, two drafting unit frequency modulators (drafting unit converter), 22,24 correspondingly co-ordinations.Especially can realize appropriate control by desired value adjuster control panel.Just might preset to desired value adjuster 46 and/or desired value adjuster control panel implementation data value thus from the centralized control unit 28 of machine.For example, just can realize parametrization by service module 42.

Thus, the additional S that establishes for reverse rotation (REV) just can be achieved by the additional control inlet 30 of frequency modulator 20 to the twisting function.The reverse rotation of this motor (REV) makes the electric drive 12 of spindle controllably carry out counter-rotation by frequency modulator 20.

By the relay 31 conversion contactors 13 that insert frequency modulator 20 start-up circuits 15, the direction of rotation of frequency modulator switches to control inlet 30 (REV) from control inlet 29 (FOR).Like this, relay 31 plays the effect of change-over switch.The centralized control unit 28 of machine exports 11 trigger relays 31 by the numeral of regulation.

Service module 42 can have the summit of selecting of belt variable variable, is used for the Z of spindle or the preset value of S direction of rotation.

In frequency modulator 20, direction of rotation is to show forward (FOR) or reversing (REV) with relevant parameters.All each operation phase at machine all guarantee correct direction of rotation.

Frequency modulator not only is used for this fine spining machine driver 12 in principle, and can be used for any other fine spining machine driver, described frequency modulator is configured to both can control the driving of a direction, can control the driving of another direction again, and has a control corresponding inlet at least.In addition, in this class frequency modulator, two independent control inlets can be set also,, for example, can replace control by relay corresponding to two opposite direction of rotation.Be not subjected to the restriction of embodiment correlation form, for example, direction of rotation can also change by at least one parameter that changes relevant frequency modulator.

The

driver

14,16 of drafting unit also can be controlled by the frequency modulator of corresponding layout in principle, that is to say, adopts the relevant method of above that introduce and spindle driver 12.

The centralized control unit 28 of machine can comprise a counter-rotating controlling organization, can control the frequency modulator and/or the relay that are used for the drafting unit driver, in this way, after fine spining machine stopped, relevant drafting unit driver was with the driving side one end reversing ormal weight of drafting unit cylinder.

This will cause the drafting unit cylinder to rotate and/or lax less angle at free end at parking period, and this angle may be than littler under the situation of not taking above-mentioned measure.According to Fig. 4, at normal operation period, the moment of torsion that the cylinder 16a of drafting unit is stood rises to maximum V1 value at free axle head, if two ends drive, then rises to maximum at the center of machine.After cylinder was lax, if the driving side of drafting system cylinder (left side) end is fixed, then the moment of torsion angle was returned to the V2 value.Promptly lax by the reversing of on the driving side of drafting unit cylinder, taking control, the relative moment of torsion dv ' that described cylinder stood also is exactly that active on the left end is lax, after drafting unit partly unloads, also be exactly the passive lax dv on the opposite end ", these two values poor less than absolute value V1-V2 thus.Because reduced the rate of travel of drafting unit cylinder between the relaxation period after the parking, the stretching error also just is restricted, and that is to say, remains on acceptable number.

In order to understand better, the qualitative change procedure and/or the numerical value of Fig. 4 drafting unit cylinder moment of torsion are listed as follows:

V is through the moment of torsion (moment of torsion angle) of the drafting unit cylinder of length L

Moment of torsion during the V1 steady-state operation

Moment of torsion after the V2 parking period is lax

Moment of torsion under the effect of V3 relaxation device

Relaxing of dv ' configuration relaxation device situation bottom roll left end (driving side)

Dv " right free-ended lax and lax in machine center when adopting two ends to drive of cylinder

Relaxing at right-hand member when V1-V2 does not have relaxation device

According to the present invention, in order to regulate, especially for the optimization yarn qualities, the control module 28 of fine spining machine will be set up start unit 28a, and the preliminary draft amount by the start unit drafting unit can change.The preliminary draft of fibrous material 110 carries out between to w1 w and roller at roller.Roller is to forming by driving bottom roll and superjacent pressure roller often, so each spinning station all has been equipped with a pair of roller.In following introduction, roller all is called bottom roll w, w1 and w2 to every roller that is arranged on the below among w, w1 and the w2.In order to change the preliminary draft amount of drafting unit, preferably middle bottom roll w1 is driven slowly a bit or hurry up.Roller and/or roller remain unchanged to the peripheral speed of w and w2.In order to change the preliminary draft amount, can also change the peripheral speed of the first bottom roll w, still, thus, have in the peripheral speed of identical ratio change bottom roll w2, this is that this is the basic demand of producing a certain model yarn for whole drawing-off amounts in the drafting unit scope remain unchanged.In addition, spindle driver 12 and roller also are necessary to the constant velocity-ratio of w2.

It is for two rollers are brought up at utmost the performance of the drafting unit between w and the w1 that the peripheral speed of roller w1 is changed.The present invention is based on and found, when the roller just in preliminary draft district is maximum to the drafting force between w and the w1, dominant draft especially uniformly takes place between roller is to w1 and w2.Fine spining machine according to the present invention's design has a control module, and it can adjust the optimum state of preliminary draft automatically, thereby also adjusts the optimum state of whole drawing-offs automatically.All thus drawing-offs remain unchanged, and still according to the requirement of textile technology, preliminary draft rate and dominant draft rate will change.

According to Fig. 2 a, between roller is to w and w1, can measure with various method apart from the maximum drafting power in the preliminary draft district of S.A kind of possibility is wherein arranged, and that is exactly when changing the rotating speed of drafting unit driver 14 and/or 14b, measures the driver 14 of bottom roll w1 and/or the amperage I among the 14b, wherein the bottom roll w1 drafting unit cylinder 16a in Fig. 2 just.The rotation speed change of drafting unit cylinder 16a preferably adopts the method that is equipped with independent electric drive 14b to realize, thus in fine spining machine, particularly in ring throstle, be provided with the drafting unit cylinder 16a that several be arranged in parallel, as shown in Fig. 1 and Fig. 2, be provided with a drafting unit electric drive 14 and/or 14b for each drafting unit cylinder.The roller that other drafting unit electric drives 16 of respective numbers are provided for respective numbers to the roller of the drive unit of w2 and/or respective numbers to w2.And roller is provided with electric drive 14a to w itself.The driver of drafting unit might only be equipped with a power supply 14 supplies two counter extensioin unit cylinder w and w1.In this case, just need set up speed changer 115, be arranged between drafting unit electric drive 14 and the gear chain, gear chain extends to bottom roll w and/or w1 from speed changer 115.When transmission device 115 extends to the speed of gear chain of drafting unit cylinder 16a and/or driveability and need change, be provided with the change-speed gearing that has control driver 115a at speed changer 115, and the control driver 115a of change-speed gearing is coupled with the start unit 28a of controlled manner and control module 28 and/or control module 28.The device that is used to adjust drum rotation speed can also be called speed regulator usually.

But, be equipped with independent drafting unit electric drive 14b for drafting unit cylinder 16a in the preferred embodiment, for this reason, according to Fig. 1,2 and 2a, frequency modulator or frequency converter 22 are connected with drafting unit electric drive 14.

Correspondingly, the frequency modulator device that other are set is used for

other driver

14a and 16.

For optimization preliminary draft amount, need to regulate substantially to Spinning Machine Control unit 28, the scope of described basic adjusting is limited to the not other every numerical value imported of piece 42 not of clothes.Basic regulated value can comprise some following parameters, generally can not generate at the centralized control unit 28 of data processor 64 or machine:

The rotating speed of the spindle of N in the spinning station has disposed spindle driver 12 for this reason

N, n1 and n2 roller be to w, the rotating speed of w1 and w2

N (t) in time and/or the variation change in rotational speed process of cop stroke etc.

After the operating parameter input, the startup stage that fine spining machine promptly being in, this moment, start unit 28a was in higher level, made its performance rise to high level as far as possible in order to control drafting unit driver 14b, for this reason, changing is that amperage with drafting unit electric drive 14b is increased to maximum.To in driver 14b or frequency modulator 22, measure amperage I and it is recorded in the determination unit 60.In addition, according to Fig. 4, the moment of torsion of drafting unit cylinder 16a can also be by

initiator

60b, and 60c notes.Each value by measuring unit and/or determination unit 60 assessments is sent to memory 62, simultaneously, in the data processor 64 that is connected with memory in time and the corner α value of amperage I value that records continuously and/or drafting unit cylinder 16a compare mutually.For the toggle speed of drafting unit driver 14b, select a speed of only a little higher than drafting unit driver 14a rotating speed and suppose that the diameter of roller is identical, like this, roller has minimum preliminary draft influence to 110 of the fibrous materials between w and the w1.

If the amperage I (N) by the N time measurement is higher than amperage I (N-1), improve so the performance of drafting unit driver 14b improves rpm-dependent, and the preset value of rotating speed (n1) can increase a difference n '.The new desired value of drafting unit driver 14b rotating speed sends setpoint cell 66 to again and then send to the centralized control unit 28 of machine from data processor 64, or directly sends to set-value adjuster 46.The result is that the power frequency in the frequency modulator 22 has increased desired value, and drafting unit driver 14b causes the further raising of preliminary draft ratio thus with higher speed operation.

The rotating speed of drafting unit electric drive 14b can divide several steps to improve, and amperage I feeds back to measuring unit 60 in each step, and described amperage will be measured and be compared with the amperage that had before recorded by current measuring unit 60a.As mentioned above, the value I that newly records also will send into memory 62 again and be handled by data processor 64, produces the poor of I (N+1)-I (N) once more.If it is positive that difference remains, produce newly-increased desired value (n1) by the setpoint cell that is connected 66, and the centralized control unit 28 by machine will increase desired value (n1) newly and send frequency modulator 22 to.Drafting unit electric drive 14b measures amperage I abreast or alternately, and as previously mentioned, the corner of drafting unit cylinder 16a can also be measured.For this reason, for example record mark on the drafting unit cylinder 16a, so at time point t1, a measuring-signal is transmitted into measuring unit 60 at initiator 60b.When the load of drafting unit cylinder 16a has caused the cylinder moment of torsion, in the same way attached to the mark on the drafting unit cylinder 16a, be recorded in initiator 60c at time t2 subsequently, time difference t2-t1 sends to data processor 64 via memory 62, data processor 64 is handled by the transient speed n1 of counter extensioin cylinder 16a, just can determine the moment of torsion α between initiator 60b and the 60c easily, because this corner is directly proportional with the product of transient speed and time difference t2-t1.In order in fact to make the preliminary draft optimization, need not measure amperage I, also can in drafting unit driver 14b, measure the corner α of a drafting unit cylinder 16a part, this is in order to find out the relative performance level of drafting unit cylinder 16a.During the optimization procedures of drafting unit cylinder 16a preliminary draft amount v, can simultaneously or determine the amperage I of drafting unit driver 14b and the moment of torsion of drafting unit cylinder 16a abreast, because this can obtain the limit value of drafting unit cylinder 16a maximum permissible torque α.

Increase gradually and therefrom during the increasing gradually of drafting unit cylinder 16a rotating speed, the corner α=α n1 (t2-t1)/30 that increases gradually in data processor 64 also can determine and compare with maximum permissible value at the rotating speed of driver 14b.If rotation speed n 1 increases continuously, when reaching the limit value of drafting unit cylinder maximum permissible torque, optimization procedures just can stop, and before reaching the maximum current I consumption of drafting unit electric drive 14b, the optimization of preliminary draft ratio stops.When the moment of torsion of having ignored drafting unit cylinder 16a and increase continuously the preliminary draft ratio when exceeding optimum value, the amperage of drafting unit driver 14b and/or power input will descend once more, thus, if the difference between two amperage I (the N+x)-I (N+x1) of (N+x) suboptimization step becomes zero maybe will become negative the time, best preliminary draft amount v also can determine in data processor 64.

When the rotating speed of the best (n1+xn ') reaches, described rotating speed is by a succession of value that records is carried out relatively determining accordingly in data processor 64, the clear and definite desired value that fine spining machine input and/or that select was regulated before this rotating speed of target of determining (n1+xn ') was used as, wherein said adjusting is finished by the service module 42 in the setpoint cell 66, and is used for spinning process from now on.Optimized rotating speed behind x iterative step (n1+xn ') also end to this, can on service module 42, be indicated as being empirical value, the yarn that can be used for is from now on produced in batches, and can be preserved by means of data processor.

Optimized preliminary draft value can be defined as the new rotating speed of roller w1 and the ratio of the new rotating speed of roller w.If, the record of optimization procedures is announced out for example, by demonstrating, this is helpful to operational administrative on service module 42 by data processor 64.

Be the necessary construction package of optimization preliminary draft amount, as measuring unit 60, memory 62, data processor 64, setpoint cell 66 etc., the material member that can be used as start unit 28a assembles up, perhaps, start unit 28a and/or centralized control unit 28 that the assembly of being mentioned is stored in machine as the routine or element to the small part of electronic data processing (EDP) program, thus can with machine center control module 28 in the central electronic data handle the optimization procedures that (EDP) control program carries out jointly during, handle as routine.

Relate to the optimization of preliminary draft amount, the selection apart from S between the first couple of roller w and the second couple of roller w1 is also most important.Described apart from S optimization and simultaneously during the optimization of preliminary draft speed v, reduce that to cross over apart from the fibrous material tension force in the preliminary draft district of the whole length of S be possible, and can not have a negative impact yarn qualities.Can determine distance S in 50 millimeters to 90 millimeters scope that only size is 75 millimeters.

In addition, under certain conditions, it is favourable keeping being lower than slightly the optimum value that above-mentioned preliminary draft obtains than optimization, in other words, remain under the drafting force of maximum possible, because it is littler than surpassing described value to the adverse effect that yarn qualities produces to be brought down below best draw ratio.What have practical significance thus is, the preliminary draft value is chosen in the scope of 70-90% of best preliminary draft value, has so best preliminary draft value, and the power input of the electric drive 14b of drafting unit cylinder 16a becomes and is peak.

The content of introducing above can the same manner be applied to be arranged on any driver of drafting unit cylinder.

If continuous long drafting unit cylinder is to drive at its two ends, so-called thus " free end " is to be about on the machine center at half place at drum length." free end " is generally understood as a privileged site of cylinder, do not have moment of torsion on this position, or has only inappreciable moment of torsion to be transmitted.

Fig. 5 shows that preliminary draft value v gradually changes, and to the amperage I of driver with to the influence of corner α.

Beginning on drawing-off value v ≈ 1.05, amperage I and moment of torsion α progressively raise.

Can be amperage I and the limit value of stipulating No overtaking for corner α.To α, and curve map v=f (1, represent with horizontal line in A).Reached drawing-off value v ≈ 1.085 herein.But maximum effective power input does not also reach.May reach maximum amperage at v ≈ 1.11.

Claims

1. fine spining machine (10), have: drafting unit, have at least one driver that is used for the drafting unit cylinder (14,14b), described driver is controlled by speed regulator, and the centralized control unit (28) by machine is monitored described speed regulator, it is characterized in that: in order to regulate and the optimization yarn qualities, the centralized control unit of described fine spining machine (28) has been set up start unit (28a), measuring unit, memory cell (62), data processor (64) and setpoint cell (66), whereby, the preliminary draft amount of described drafting unit can change.

2. fine spining machine according to claim 1, it is characterized in that, described drafting unit comprises that first, second, third roller is to (w, w1, w2), each roller is to all being made up of the pressure roller that drives bottom roll and be pressed in above it, thereby corresponding roller is to being arranged in each spinning position, with these rollers that are provided with continuously to (w, w1, w2) bottom roller all is called bottom roll, and the preliminary draft of fibrous material (110) carries out between to (w1) (w) and described second roller at described first roller.

3. fine spining machine according to claim 2, it is characterized in that: the mechanism that the preliminary draft amount that is used to change described drafting unit is provided, thereby second roller can drive slowlyer to the bottom roll of (w1) or more hurry up, and described first roller remains unchanged to (w) and the 3rd roller peripheral speed to (w2).

4. fine spining machine according to claim 2, it is characterized in that: the mechanism that is used to change the preliminary draft amount is provided, thereby first roller is variable to the peripheral speed of the bottom roll of (w), and described the 3rd roller also can change with same ratio the peripheral speed of the bottom roll of (w2), the whole drawing-off amount of described drafting unit is remained unchanged, and the speed constant proportion can be regulated spindle driver (12) and described the 3rd roller to (w2).

5. fine spining machine according to claim 1 is characterized in that: centralized control unit (28) be designed to by change preliminary draft amount and dominant draft rate adjust the preliminary draft amount (optimum value v), thus all the drawing-off amount becomes invariable.

6. fine spining machine according to claim 2, it is characterized in that: described second roller can be by such realization to the velocity variations of the bottom roll (16a) of (w1), being described second roller comprises independent electric drive (14b) to the bottom roll of (w1), be provided with the bottom roll (16a) of several second parallel rollers to (w1), and each described second roller is provided with a drafting unit electric drive (14 to the bottom roll (16a) of (w1), 14b), thus, be provided with the drafting unit electric drive (16) of respective numbers, be used to drive described second roller to described the 3rd roller of (w1) or respective numbers to (w2), and described first roller self has been equipped with electric drive (14a) to (w).

7. fine spining machine according to claim 2, it is characterized in that: in the described drafting unit driver, only be equipped with a power supply (14) and supplied with described first and second rollers (w, w1) drafting unit cylinder, and between described drafting unit electric drive (14) and gear chain, be provided with speed changer (115), described gear chain extends to described first and second rollers to (w from speed changer (115), w1) bottom roll, thus, extend to rotating speed and the driveability of described second roller in order to change to the described gear chain of the bottom roll (16a) of (w1) from speed changer (115), on described speed changer (115), be provided with the change-speed gearing that has control driver (115a), thus the control driver of change-speed gearing (115a) be coupled with controllable way and described control module (28) or with the described start unit (28a) of described control module (28).

8. fine spining machine according to claim 2, it is characterized in that: be equipped with and be used for the independent drafting unit electric drive (14b) of described second roller the bottom roll (16a) of (w1), need adopt frequency modulator or frequency converter (22) thus, described frequency modulator or frequency converter are connected with described drafting unit electric drive (14b), correspondingly, be provided with other frequency modulator and be used for other driver (14a, 16).

9. fine spining machine according to claim 2, it is characterized in that: for the optimization preliminary draft (v), should carry out the basic adjusting of described Spinning Machine Control unit (28), the scope of described basic adjusting is to be determined by each input value in the service module (42), the value of described basic adjustment comprises parameter, N is as the rotating speed of spinning position spindle, and described spinning position is equipped with spindle driver (12); In addition, n, n1 and n2 as first, second and the 3rd roller to (w, w1, rotating speed w2); The revolution change procedure that N (t) changes as the revolution process at the time durations of cop stroke of spindle.

10. fine spining machine according to claim 1, it is characterized in that: be used for the necessary measuring unit of optimization preliminary draft amount (60), memory (62), data processor (64) and setpoint cell (66) can be used as the physical unit of start unit (28a), the perhaps measuring unit of being mentioned (60), memory (62), start unit (28a) or centralized control unit (28) that data processor (64) and setpoint cell (66) are stored in machine as the routine or worker's element to the small part of electronic data processing (EDP) program can adopt routine to handle during (EDP) control program carries out optimization procedures handling together with the central electronic data of the centralized control unit (28) of machine thus.

11. fine spining machine according to claim 1 is characterized in that: fine spining machine is a kind of ring throstle.

12. fine spining machine according to claim 1 is characterized in that: speed regulator is frequency modulator or frequency converter (22).

13. be used for method of operating according to the fine spining machine of claim 1, it is characterized in that: change described second roller to (w1) peripheral speed be for described first and second rollers to (w, the output of the drafting unit w1) is brought up at utmost, can be at described first and second rollers to (w1, w2) obtain dominant draft very uniformly between, drafting force in the preliminary draft district is relatively the highest thus, promptly, described first and second rollers are to (w, w1) drafting force between is the highest relatively in variation zone.

14. method of operating according to claim 13 a described fine spining machine, it is characterized in that: determine to cross over described roller (w, maximum drafting power in the preliminary draft district of the distance w1) (S) can be by such mode, when the rapid change of described drafting unit driver (14 or 14b), measure described corresponding to described second roller to the driver of the bottom roll (16a) of (w1) (14,14b) Nei amperage I.

15. the method for operating of fine spining machine according to claim 13 is characterized in that; After the input operation parameter, the startup stage that described fine spining machine being in, in this stage, described start unit (28a) is in higher level, make its performance bring up to high as far as possible level in order to control described drafting unit driver (14b), change with regard to being the amperage of described drafting unit electric drive (14b) is brought up to maximum.

16. the method for operating of fine spining machine according to claim 13 is characterized in that: the amperage I in described driver (14b) or the frequency modulator (22) is measured and is recorded in the determination unit (60).

17. the method for operating of fine spining machine according to claim 16, it is characterized in that: the value of being measured by measuring unit or determination unit (60) can be sent to memory (62), by the data processor (64) that is connected with described memory, the value of the amperage I of timely continuous measurement can be compared mutually, startup rotating speed for described drafting unit driver (14b), can select an only a little higher than drafting unit driver (14a) rotating speed speed and have identical roller diameter, like this to being in described first and second rollers to (w, w1) fibrous material between has only very little preliminary draft.

18. the method for operating of fine spining machine according to claim 16 is characterized in that: (60b 60c) writes down and assesses determination unit (60) in described second roller by initiator to the torque of the bottom roll (16a) of (w1).

19. the method for operating of fine spining machine according to claim 18, it is characterized in that: the value of being measured by measuring unit or determination unit (60) can be sent to memory (62), by the data processor (64) that is connected with described memory, the amperage I of timely continuous measurement and described second roller value to the corner (α) of the bottom roll (16a) of (w1) can be compared mutually, startup rotating speed for described drafting unit driver (14b), can select an only a little higher than drafting unit driver (14a) rotating speed speed and have identical roller diameter, like this to being in described first and second rollers to (w, w1) fibrous material between has only very little preliminary draft.

20. the method for operating of fine spining machine according to claim 17, it is characterized in that: if in the N time is measured, amperage I (N) is greater than amperage I (N-1), performance improves to be expected to improve by rotating speed and realizes in the so described drafting unit driver (14b), and the preset value of rotating speed (n1) can increase difference (n '), so the new speed desired value of described drafting unit driver (14b) sends to setpoint cell (66) from described data processor (64), then be sent to the centralized control unit (28) of described machine again or directly be sent to set-value adjuster (46), the result is, power frequency in the described frequency modulator (22) has increased desired value, described drafting unit driver (14b) causes the further raising of preliminary draft ratio thus with the high rotational speed operation.

21. the method for operating of fine spining machine according to claim 17, it is characterized in that: the amperage I that is measured by current measuring unit (60a) feeds back to measuring unit (60), compare with the amperage that had before recorded, then new measured value I is sent to memory (62) and handle by described data processor (64), because the result of difference I (N+1)-I (N) remain on the occasion of, so further increase desired value (n1) and the centralized control unit (28) by described machine sends new desired value to described frequency modulator (22) by the setpoint cell (66) that is connected.

22. the method for operating of fine spining machine according to claim 17, it is characterized in that: the rotating speed of described drafting unit electric drive (14b) divides some ranks to improve, all will be abreast or measure the amperage I of described drafting unit electric drive (14b) and described second roller corner (α) to the bottom roll (16a) of (w1) alternately in each rank.

23. method of operating according to claim 18 or 22 described fine spining machines, it is characterized in that: described initiator (60b) senses described second roller to the mark on the bottom roll (16a) of (w1), at time point (t1) measuring-signal is sent to described measuring unit (60), because described second roller has caused torque to the load of the bottom roll of (w1), then attached to described second roller being marked on the bottom roll (16a) of (w1) is recorded in initiator (60c) on the time (t2) after a while with the same manner, time difference (t2-t1) sends described data processor (64) to via described memory (62), by described second roller is handled the transient speed (n1) of the bottom roll (16a) of (w1), two initiator (60b have been determined, torque 60c), thus, corner is proportional to the product of transient speed and time difference (t2-t1).

24. the method for operating of fine spining machine according to claim 14, it is characterized in that: for the optimization preliminary draft, measure the corner (α) of described second roller to bottom roll (16a) part of (w1), so that provide of the indication of described second roller to the level relatively of bottom roll (16a) performance of (w1), perhaps, at described second roller to the preliminary draft amount of the bottom roll (16a) of (w1) (during v) carrying out optimization procedure, simultaneously or measure the amperage I of the second drafting unit driver (14b) and second roller torque α abreast, with in order to be no more than described second roller to the maximum limit value that allows torque of the bottom roll (16a) of (w1) to the bottom roll (16a) of (w1).

25. the method for operating of fine spining machine according to claim 24, it is characterized in that: at rotating speed that improves described driver (14b) gradually (n1) and described second roller during the rotating speed to the bottom roll (16a) of (w1), described data processor (64) is also measured the corner (α=α n1 (t2-t1)/30) that increases gradually, and compare with maximum permissible value, along with improving constantly of rotating speed (n1), when promptly arriving the limit value of the maximum permission of described drafting unit cylinder torque α, just stop optimization procedure, like this in the optimization that finishes before the preliminary draft ratio to the described maximum current I consumption that reaches drafting unit electric drive (14b).

26. method of operating according to claim 20 or 21 described fine spining machines, it is characterized in that: the torque and the improving constantly of preliminary draft ratio of the bottom roll (16a) of (w1) exceeded optimum value if ignored described second roller, the amperage of described drafting unit driver (14b) or power input can descend once more, like this, if the difference between two amperage I (the N+x)-I (N+x1) of (N+x) suboptimization step becomes zero maybe will become negative the time, described data processor (64) can determine preliminary draft amount (optimum value v).

27. method of operating according to claim 16 or 18 described fine spining machines, it is characterized in that: when reaching optimum speed (n1+xn '), described optimum speed is that described data processor (64) is determined by recording numerical value respectively more continuously, the rotating speed of determined target (n1+xn ') is taken as clear and definite desired value, the adjusting of fine spining machine input or that select before being used for, described adjustment is finished by described service module (42), and be used for from now on spinning process by described setpoint cell (66), thus, optimum speed behind x iterative step of process (n1+xn ') stop, on described service module (42), be indicated as the empirical value that can be used as yarn batch process from now on, can also preserve by means of described data processor, in addition, can determine that optimized preliminary draft value (vo) is described second roller to the new rotating speed of (w1) and described first roller ratio to the new rotating speed of (w).

28. the method for operating of fine spining machine according to claim 13, it is characterized in that: during carrying out optimization preliminary draft ratio, under the situation that is lower than the maximum possible drafting force, operate, can be than surpassing the little of best draw ratio because be brought down below best draw ratio to the adverse effect that yarn qualities produced, thus, what be of practical significance is that the preliminary draft value is chosen in the 70-90% scope of best preliminary draft value, adopt so best preliminary draft value, input becomes and is peak described second roller to the power of the electric drive (14b) of the bottom roll (16a) of (w1).

29. the method for operating of fine spining machine according to claim 13, it is characterized in that: relate to optimization preliminary draft amount (v), also want described first roller to (w) and second roller to the distance between (w1) (S), for this reason, the described distance of optimization (S) and simultaneously optimization preliminary draft speed (v) during, in crossing over the distance whole length of (S), reduce the tension force of fibrous material, and yarn qualities is not had a negative impact, distance (S) is determined in the scope between 50 millimeters to 90 millimeters.

30. the method for operating of fine spining machine according to claim 29 is characterized in that: distance (S) is defined as 75 millimeters.