CN1046568A - Weaving loom, particularly a kind of ring spinner or wing spinning machine - Google Patents

Abstract

Described weaving loom has a drafting system at least, its drawing roller is can be driven, having independently at least in part, drive motors drives, its velocity of rotation is controllable, drive motors is connected on the driven roller by friction clutch, and this friction clutch passes through electronic controller switch jointly.Each clutch is installed on the associated drives mechanism group between two transmission devices.The gearratio of the tumbler of roller side is can be selecteed, therefore, has reduced rotating torque equally for different clutches.At least drafting system can be separated from from relevant drive unit after dropping to a minimum of a value in that its velocity of rotation is controlled, has maximum effectively persistence spindle at least and breaks away from according to this and constantly can be braked.

Description

Weaving loom, particularly a kind of ring spinner or wing spinning machine

The present invention relates to a textile machine, particularly relate to a ring spinner or flyer spinning machine, it comprises at least one drafting system, this drafting system has some groups of drafters, between corresponding drafter group, form at least one drawing-off zone, it has independently drive motors, especially speed control motor, be associated with at least two drawing-off units, drive motors can link to each other with the driven roller of relevant drafter group by some friction clutches, and this friction clutch can be by Electronic Control switch jointly, between corresponding driving motor and associated driven roller, have a transmission device at least and be installed in the drive train.

Conclusive especially key factor is to realize that as much as possible operation uniformly and its driven operation element obtain accurate speed in the ring spinner, and especially these operation elements are realized definite rotating ratio and/or speed ratio.With regard to ring spinner for instance, its important operation element is a spindle, drafter and ring-shaped guide rail or ring rail.For keeping always identical drawing-off, the velocity of rotation of each roller of drafting system must have one to determine ratio mutually at this.The twist that is compared to yarn and the intensity of the velocity of rotation of spindle and transporting velocity have certainty, and it is very important that the package that is compared to yarn on the sleeve of the movement velocity of last ring rail and this speed and transfer rate is shaped.

Only consider that this assembling must keep stable yarn qualities characteristic, any type of starting or stop control, at this control period, the speed of operation element rises to the rotary speed that the speed that can be scheduled to maybe can reduce to null range by velocity of rotation or in the speed of null range, be not noncritical fully, particularly owing to each operation element of ring spinner must be controlled as far as possible respectively, to realize the changeability of higher degree, therefore just should avoid positive drive to connect as far as possible, because normally used speed control electric motor almost can not be controlled in contiguous zero low-speed range, this must keep the assembling of stable yarn qualities characteristic just can not directly realize by controlling these drive units.

In the disclosed drafter of DE2753924 C2, the measure that proposes expressly is, at first use synchronous motor only its reach a predetermined electric motor can with the slowly running of the Frequency Synchronization starting of feeding after, be connected to corresponding than on the low speed roller by clutch, during this device connects, this device can occur and the inconsistent deviation of desired speed ratio, and it can cause damaging yarn qualities.

The purpose of this invention is to provide a sort of weaving loom that is proposed in beginning.Wherein, claimed apparatus can obtain stable spinning quality, as especially determining the equipment of rotating ratio or speed ratio, and this equipment even in the lower critical range of rotating speed, and during the critical condition of coupling, can utilize simple device to start without a doubt.

Can reach this purpose according to the present invention, promptly each clutch is installed between two transmission devices; Transmission device between clutch and associated drives roller have gearratio, so that during the drive motors with operation is connected, in the load-side of the different clutches moment that rotates, driven roller is quickened, these driven rollers have with corresponding to the substantially invariable at least speed ratio of desirable drawing-off, this selects to regulate by electronic-controlled installation and frequency changer.

Because the result of this structure in a simple and reliable mode, can guarantee that this assembling can obtain stable yarn qualities all the time, especially during connecting critical condition, the deviation of quality requirement can not appear not meeting.For example, in the accelerating period of drafter, owing to realize the result that all roller speed evenly rise, it is constant that drawing-off also can keep.In fact, are transmissions together just as them.As has a predetermined anglec of rotation ratio.The drafter group can and be stopped after being disconnected once more from the inactive state starting, equally also may be used on the rotation reduction of speed of roller and the decoupling of related driving device.

When feeding during Frequency Synchronization of motor and they, drive motors at first is connected in the load by clutch, for example, for this reason when motor when the accelerating period reaches a minimum rotation speed, for making drive motors connect load, or when system's stopping period drive motors rotates with minimum rotation speed, be separated from from drive motors for making load, its rotating speed of motor can be monitored, and the control of this motor speed and clutch can be finished by shared Electronic Control.

Rotating torque conversion can be provided at arbitrarily between motor and the load, is not enough to this motor is placed a kind of like this state once more so that be applied to the rotating torque of connecting the motor in the load, the promptly required state that no longer exists with the Frequency Synchronization of feeding.

Therefore, the present invention is also special to guarantee different load at one's discretion, and the roller of drafting system is simultaneously starting rotation corresponding to selected draft speed, even and guarantee to unclamp between the emergence period at clutch, can keep desirable drawing-off value.

At this, the transmission that is installed in the conveyer between clutch and the relevant driven roller is more selectable than preferably, so that have essentially identical rotating torque at least, be reduced to the rotating torque of minimum of a value especially as far as possible, be created in the load output of different clutches.

Consider the starting of each drafting system roller or gradually stop to reach even as much as possible that the type of the clutch that suitable suitable method provides should be done one's utmost the same with size.

The speed ratio of connection procedure counter extensioin mechanism roller and can further reduce to the influence of yarn qualities, because having comprised the driving mechanism group of these clutches so advantageously arranges, and clutch so can control, and therefore same connection and the out of gear mesh time reaches short as much as possible.

Weaving loom, especially ring spinner have at least one drive system, are used to drive various loads, as spindle, drafting system, ring rail or similar device.Its specific question is that these loads have different at least in part effective persistence (effective persistency).

If drive unit is disconnected too morning or out of gear mesh too early from relevant load during velocity of rotation is stopped gradually, this will cause drafting system to stop at once, at this time spindle is because its intrinsic inertia, generally be rotated further with speed at first, therefore there is very big broken yarn danger, one of reason that drafting system stops immediately is that effective persistence of drawing roller is reduced to minimum situation, especially owing to be provided at relevant drive motors and the gearratio between the roller and the existence frictional force to spindle.

However, for the condition that keeps determining, reality promptly is that the velocity of rotation that produces drops to zero critical range, the measure that a most preferred embodiment according to the present invention is made is, the velocity of rotation that at least a portion loads on relevant drive unit reduces to be reduced to after the predetermined speed of minimum that this device rotates, can be separated from from relevant drive unit; And having maximum effective persistent load at least can be braked according to the out of gear mesh time of related load.

Like this, be the running of the assembling that obtains stable yarn qualities, be actually all critical overall processes that are reduced to zero rotating speed than lower speed range, for example, also can be after driving be separated from, even like this under minimum rotation speed, desirable yarn qualities deviation can not occur yet.This mode and device wherein, have maximum effectively lasting load and are braked, and can adapt with the performance from the out of gear mesh other load of its drive unit.

Therefore, the basic scheme of this derivation of the present invention is, each drive unit controllably drops to minimum rotation speed gradually, with this speed, this drive unit still can directly be controlled, and makes at least to have little lasting load and reach relatively apace and stop, and then drive unit is separated from from related load, and drop in order to keep desirable speed ratio and rotating ratio, make having big effective persistent load braking and to stop.Therefore, when shutting down, the danger that broken yarn occurs is reduced to minimum.According to the present invention, even in lower velocity of rotation scope, keep the desirable tension force of yarn, also be possible obviously.

At least basically with other relevant out of gear mesh moment of load, preferably having big effective persistent load can be braked.Yet, from also can expect at all can this moment slightly before or brake this after a while and have maximum effective persistent load.Its main points are, should keep to be actually dropping to desirable velocity of rotation and the relevant work component speeds relation that machine stops, and this time of these ratios and ideal value deviation appears and should be short as far as possible.

The maximum effective persistent load that has that is braked can connect up to dropping to the moment that stops with relevant drive unit maintenance.So very likely equip an electrical braking device of this load, because its relevant motor is as an engine operation that has been used for braking action.For this purpose, a kind of braking resistor can be provided especially, for corresponding retrosequence, it can be switched on.

If after machine stops or in the process that promotes to doff, keep desirable yarn tension, then advantageously after its load has been braked, will has maximum effective persistent load and be fixed on its final position.In special circumstances, can be preset when respective end position with maximum effective persistent load, it is very favorable.

A kind of particularly advantageous variation according to the present invention, friction stopping device with have maximum effective persistent load and be associated.

Better each is all formed by a motor drive unit of the respective drive system that is associated with load, and this motor has a speed control by the frequency of feeding.For example can use synchronous motor, reluctance motor, synchronous motor and permanent excitation electromotor are regulated in speed or orientation.Such speed control motor is adapted to its velocity of rotation especially or speed compares by accurate each drive unit of keeping, in this case, when minimum rotation speed is determined by the minimum rotation speed of motor at least basically, it is favourable, the speed of its motor is controlled by the frequency of feeding, and motor is guaranteed fully synchronously with its speed and the frequency of feeding.

Switching on and off of load should occur in when rotating low speed as far as possible.So, according to a kind of preferred derivation, the scheme that proposes is between load, especially between driven roller and the drive motors that is associated, predetermined minimum rotation speed with drive motors produces connection or disconnection, with this speed, motor is still guaranteed (its speed is controlled by frequency changer by the frequency of feeding) fully synchronously with the frequency of feeding.

For ring spinner, that especially can brake has a preferably spindle of maximum effective persistent load.

For the ring spinner example, the drafter group of persistent load, especially at least one drafting system that at least one is low relatively relies on clutch to be separated from or to be connected to the corresponding driving device expediently again.If the several drafting system mechanism group of a special drafting system is driven, then they preferably simultaneously can break away from the corresponding driving device.Relative with spindle, effective persistence of drafting system roller generally is reduced to minimum, especially since rotation between corresponding motor and roller than and because existing frictional force, so that drafting system has stopped after being separated from time in fact immediately.So spindle is fast braking correspondingly,, thereby can avoid broken yarn so that keep ideal yarn tension force.

Another particularly preferred embodiment of the present invention, it is characterized in that and having the drive unit that maximum effective persistent load is associated and comprise an electric motor, at the power supply intercourse, be used for the emergent supply of at least one other motor, it plays an engine.Owing to be used to have the maximum effectively corresponding layout of this electric motor of persistence load, it is possible to be by motor-driven that plays engine action and the drive unit that other load is associated, to have dropped to minimum velocity of rotation up to them.

If corresponding driving system has independent drive unit.Be used at least a portion load, an electronic-controlled installation then is associated with drive system easily so, by this system, and the speed of its velocity of rotation or load, and/or rotating ratio or speed ratio can be adjusted in advance.

Electronic Control preferably includes a control of stopping gradually, so that slowing down, the control motor drops at least than lower speed range, especially at the power supply intercourse, and keep rotation speed ratio and/or the speed that to be scheduled to by a frequency changer or similar device.During power interruption, advantageously produce this and gradually stop control, gradually stopping of its mode and weaving loom during orderly closedown is the same.

Similar drafting system, and the drive unit that is associated can be provided at the both sides of machine.

The controlled expediently minimum rotation speed of being scheduled to that drops to drafting system roller or drive unit of drive unit, this roller is separated from from relevant drive unit by clutch then.With regard to ring spinner, ring ingot ring rail preferably also can be separated from from relevant drive unit.During this process, selected this minimum rotation speed and motor are connected to the drafting system roller, and the minimum speed that drafting system is quickened can be identical.

Transmission of flute profile band and/or gear drive can be provided between load in the driving mechanism group and the relevant drive unit.Flute profile belt transmission and gear drive preferably all are provided, and advantageously are installed between drive unit and the corresponding clutch for the flute profile belt transmission, and gear drive then is installed in load, between especially corresponding drafting system roller and the clutch.The flute profile belt transmission is not only as the load transmission, and the while is as vibration absorber.Like this, it can prevent motor, and for example the FREQUENCY CONTROL alternating current generator under certain operating condition, especially under low-speed range, produces torque pulse.This pulse meeting causes the damage of driving mechanism group, and for example damages the gear drive that is provided.Therefore for instance, the transmission that is installed in drive chain between corresponding clutch and the associated drives roller can be so a kind of gear drive, obtains the equilibrium of the loading moment of different clutches by this gear drive.

Brake apparatus preferably is installed on the driving mechanism group relevant with conveying roller between the clutch and the transmission of roller side, has this brake apparatus, for example can be used for avoiding after breaking away from, and conveying roller turns round backward.

Driven roller can continue on the whole spinning position respectively, this station is the respective side at machine, two drive motors are associated with one of two driven rollers at least, and be installed in their two ends, in this is installed, the driving mechanism group of one special drafter roller comprises these drive motors, and has same structure.For example, if three drafting system rollers are provided, then outlet roller and input roller can be especially by a drive motors to driving respectively, and intermediate calender rolls is coupled by a variable speed drive and input roller, so that these rollers are with certain speed operation of mutual velocity of rotation gearratio, this speed is predetermined by variable speed drive.

On the other hand, in each case, two drive motors also can be relevant with all driven rollers, and can be installed in their two ends, and in this was installed, drafting system for example, can comprise three or four driven rollers.

According to a kind of particularly advantageous subform of the present invention, the scheme of making is, one corresponding drafter is formed driven roller and is divided into two groups of parts at least again, be placed on the longitudinal direction successively, and in each case, motor can be connected with the part of respective sets by a clutch, for example, driven roller is by without distinguishing in these two rollers, and their each ones are driven by a motor that connects together.For example, the loading moment of this measure clutch that will be associated with the respective drive motor has reduced half.

On the other hand, the drive system that is used for weaving loom of the present invention the Swiss Patent application described for No. 2571/88 situation about can arrange.

With reference to following embodiment and accompanying drawing, the present invention that will explain in more detail, wherein:

Fig. 1 is the part schematic diagram of two different driving systems of a ring spinner;

Fig. 2 is and the rough schematic of similar another embodiment of Fig. 1 that wherein each brake apparatus and spindle are relevant.

The illustrational ring spinner 10 of Fig. 1 and Fig. 2 comprises two drive systems 12,14, they each only represented a part.First drive system 12 be used to drive many drafting systems 20 of being provided at the spinning machine both sides ', 30 ' and two ring ingot ring rails 18 ', each ring ingot ring rail is associated with a side of spinning machine (only having represented that is encircled an ingot ring rail).Drive motors 20～26,30～36 with drafting system 20 ', 30 ' relevant, and common drive motors 18 encircles ingot ring rails 18 ' relevant with two.

Second drive system 14 be used to drive many spindles 16 ', and comprise be used for each spindle 16 ' independent spindle-driving 16.Represented spindle 16 ' or the only sub-fraction of spindle-driving 16 sums in the accompanying drawing.For example, in fact every side of a ring spinner has nearly 600 spindles.

Each spindle-driving 16 is connected on the shared frequency changer (freguency converter) 44 that is placed in the spinning machine termination by an energy distribution system 42.This frequency changer 44 is spindle-driving 16 and spindle 16 ' common, bright for instance, and it comprises rectifier and the converter (inverter) that is connected to the back.Drive system 14 comprises spindle-driving 16, and this system passes through shared frequency converter 44 energizes by the supply network shown in the line 46.

With spindle 16 ' related drive unit 16 can by price relatively economical motor formed synchronous motor for example.

Ring spinner comprise be used for drafting system 20 ', 30 ' drive motors 20～26,30～36, and be used to encircle ingot steel neck 18 ' drive unit 18, its drive system 12 by the supply network shown in the line 46 by rectifier 48 and DC intermediate circuit 50 energizes.During the power supply of the electric motor 16 by the relevant drive unit system 14 of drive unit or spindle is broken down, if with drafting system 20 ', 30 ' and start working with the standby supply source of ring ingot ring rail 18 ' related drive unit 12, then relevant with spindle drive unit system 14 also can be connected on the line 46 by rectifier 48 and DC intermediate circuit 50 easily.

With drafting system 20 ', the drive system 12 of 30 ' and ring ingot ring rail 18 ' be associated comprises (converters) 48,52 that have frequency changer; 48,54 and 48,56 three different driver elements, they be by online 46 and DC intermediate circuit 50 between shared rectifier 48 and each converter (inverters) 52 to 56 formed.Therefore, these three driver elements provide energy by shared rectifier 48 by DC intermediate circuit 50 from line 46 in the normal running.

The converter 52,54,56 of three driver elements of drive system 12 is connected respectively on the circuit or is connected on the DC intermediate circuit 50.

Electronic-controlled installation 40 interrelates with two drive systems 12 and 14 of ring spinner 10, by this device, with drafting system 20 ', the converter 52 to 56 of the drive system 12 of 30 ' and ring ingot ring rail 18 ' interrelate and with the frequency changer 44 of the drive system 14 of spindle 16 ' interrelate can be controlled.In all cases, represent by arrow S by the converter 52 to 56 of electronic-controlled installation 40 controls and the controllability of frequency changer 44.

Be used for two ring ingot steel necks 18 ' shared driving device constituted by an asynchronous machine 18, it can be controlled by electronic control unit 40 by converter 56.The movement velocity and the motor program of ring ingot ring rail adapt in spindle speed, are adjusted accordingly by electronic-controlled installation 40.

Two driver elements with drive system 12 of rectifier 52 and 54 are drafting system driver elements, best synchronous motor 20-26, and 30-36 is used as the drafting system motor.

Under any circumstance, the ring spinner 10 of present embodiment has common driven roller 60 at it, 66, each machine side of 68 have a drafter 20 ', the long whole length (see figure 1) that extends to spinning machine basically of 30 ' this driven roller also will be described its accurate configuration below in further detail.At longitudinal direction, these driven rollers also can be divided at least two groups again, and one of them is placed in after another, and for example it can separate in the centre.In this case, between each several part in groups, there is not mechanical clutch.

In specific embodiments, three driven rollers 60,66,68 are arranged on each side of spinning machine, are actually front portion or 60, one intermediate calender rolls 66 of outlet roller and rear portion or input roller 68.Because the moment of torsion of roller, for fear of the yarn defect, each roller of driven roller 60,66,68, for example driven roller is whole service herein, is to be driven at its two ends, for this purpose, under the situation of existing synchronous motor, drive motors 20-26 independently, 30-36 is associated with anterior outlet roller 60 and with rear portion or input roller 68, and intermediate calender rolls 66 is failed 68 by a speed change conveyer 74 with rear portion or input and is connected.Like this, intermediate calender rolls 66 and rear portion input roller 68 have a rotating ratio, and its rotating ratio is determined by speed change conveyer 74.Speed change conveyer 74 is by power shaft 76 transmissions, and this power shaft is by below one joining transmission system and the corresponding driving motor 36 that further describes, and one is in transmission connection accordingly also is provided at the other end of two rollers 66 and 68.

The more detailed transmission of three drafting system rollers 60,66,68 is as described below:

The front portion on two synchronous motors 20,22 and the ring spinner 10 or the two ends of outlet roller 60 link, and at this moment two synchronous motors 24,26 are placed in the two ends of another outlet roller, the defeated opposite side that is located at ring spinner of this output.These four drive motors 20-26 are placed in the both sides of spinning machine, are associated with outlet roller 60, and control by converter 52.

On the contrary, shared converter 54 is provided with for four synchronous motor 30-36.Two synchronous motors 30,32 herein are associated with input roller 68 and intermediate calender rolls 66 two ends on ring spinner 10 1 sides respectively, and two synchronous motors 34,36 are associated with the input roller of ring spinner opposite side and the two ends of intermediate calender rolls.Input roller on each side of spinning machine and intermediate calender rolls 68,66 are combined into a roller group respectively, and link together by described variable speed drive 74 at each end.But,, can adopt independently drive unit basically for centre and input roller.

On the other hand, the drafting system with four live-rollers also is conceivable, and in this case, all live-rollers are preferably still installed motor by two ends and driven.In addition, live-roller can be distinguished again, and each roller or roller group partly do not have mechanical connection.

Common motor 18 at spinning machine both sides and two ring ingot ring rails 18 ' be associated can be utilized an asynchronous machine.

Each motor shaft 78,78 ' and a relevant drafter roll end between, for example can be provided with a flute profile conveyer belt 72,72 ', clutch 62, a 62 ' and gear transmission device (or speed-changing gear box) 58,70(sees Fig. 1).In addition, after spinning forms, for example for preventing the reversing of outlet roller 60, outlet roller 60 in this case between clutch 62 and gear transmission device 58, according to present embodiment a brake apparatus 64 is set.Flute profile conveyer belt 72,72 ' can be used as vibration absorber, under the low speed transmission, the shock impacts that its available buffer is produced by relevant electronic transmission, and in the scope of drafting system roller 60,68,66, can protect easily impaired gear transmission device 58,70 thus.For the higher relatively speed that makes associated motor relevant clutch 62,62 ' input be reduced to one than low value, flute profile band conveyer 72,72 ' simultaneously is used to change its velocity of rotation.Gear drive 58,70 is together with flute profile band conveyer 72,72 ' can be used to change rotating torque, so that connecting respective clutch 62,62 ' time, corresponding motor is not loaded with the high moment of inertia of static roller.

Thus, spindle 16 ' effective persistence be higher than drafting system 20 ', 30 '.

Electronic-controlled installation 40 comprises an accel control, and it is by a control corresponding device, by clutch 62,62 ' arrow (S) shown in, make the corresponding driving motor its with the Frequency Synchronization of feeding after at first be connected on the relevant live-roller.Thus, all clutch 62,62 ' whiles are controlled.

In addition, advantageously electronic-controlled installation 40 also comprises a rotational delay control device or fixed-position stop control apparatus gradually, its control reduces the speed of drive unit system 12,14, determine rotating speed or speed and keep, and rotating ratio and velocity ratio, reduce to the minimum rotation speed that asynchronous machine rotates, and under this speed, these motors can be controlled still.This minimum rotation speed can be connected to the such rotating speed of driven roller by clutch with motor and adapt, and promptly under this rotating speed, makes its drafting system accelerated service.

Open circuit normally and following power interruption during, gradually fixed-position stop control apparatus or rotational delay control device are very effective.Gradually stop control period at such one, and during the other operational phase, the rotating ratio of transmission or speed ratio can be set in advance also by electronic-controlled installation 40.

Between two transmission devices 72,58 and 72 ', between 70, each clutch 62; 62 ' be placed on the corresponding transmission unit transmission device 58 herein; 70 are placed in clutch 62; 62 ' with relevant driven roller 60,68 between so that during the drive motors of its operation connected, rotating torque was created in different clutch 62; 62 ' load-side on, especially cause the operation of driven roller 60,68, with the transmission rotating ratio speedup of substantial constant at least, this speed ratio adapts with the desirable drawing-off of selecting for use by electronic-controlled installation 40.

In this set, be placed in clutch 62; 62 ' with relevant driven roller 60; Conveyer 58 between 68; 70 transmission ratio is selection like this, so that it produces essentially identical at least rotating torque, and at different clutch 62; 62 ' its rotating torque of output loading side be reduced to minimum of a value.In addition, drive train so arranges so that obtain and short connect hours with than the P cock allowable deviation.Its switch acts on when slowly running, for example described in Swiss Patent application number No.2571/88 like that.

On the other hand, if be used for drafter 20 ', 30 ' and be used for ring rail 18 ' the minimum rotation speed that can be scheduled to of drive system 12 controlled of dropping to the drafter roller, then at least drafting system 20 ', 30 ' can be separated from from drive system 12.For this reason, be present in clutch 62,62 between respective drive device and the relevant drafter roller ' be opened.Among Fig. 2, the drive unit 20 that shows outlet roller 60 concisely for example and be associated with outlet roller 60.

The variation of Fig. 2 is to be different from the embodiment of Fig. 1 on it constitutes, and only actually is the friction stopping device 38 that has added with spindle 16 ' be associated, and this brake apparatus can be controlled by electronic-controlled installation 40.Such friction stopping device can with each spindle 16 ' be associated, yet can imagine basically and can provide a shared friction stopping device to be used for several or all spindles.

The ring spinner running is described below:

As long as the drive system 14 that is associated with spindle has been started running, be stretched tensioning and formation ballooning of yarn of yarn (not shown) then, be right after after this, brake apparatus 64 is unclamped by electronic-controlled installation 40 immediately, so front portion or outlet roller 60 be released, and quickens gradually.Meanwhile, electronic-controlled installation 40 changes input signal for converter 52,54, and promptly from desirable frequency zero-bit to a small frequency, for example this small frequency is 5 5Hz.Clutch 62,62 ' still open at first so that motor can quicken under the load gradually not having at first, up to motor with feed Frequency Synchronization.

Motor thus synchronously after soon, electronic-controlled installation 40 connect simultaneously all clutches 62,62 '.Motor shaft 78,78 ' existing by be associated with it, to also static live-roller 60,66,68 loadings this moment, especially, its pay(useful) load moment is reduced to minimum by conveyer 58,70.During connection procedure, live-roller 60; 68 are accelerated gradually, and be that the speed ratio of substantial constant is at least arranged, this rotating ratio is consistent with the desirable drawing-off that electronic-controlled installation unit 40 is adjusted in advance, this is that loading moment by different clutches mates mutually and obtains, for example, if the rotating torque of input roller and outlet roller is respectively 200Nm and 20Nm, be respectively 45.7: 1 and 4.5: 1 for conveyer 58 that is associated and 70 selected transmission than then so.

By being configured in two conveyers 72,58 and 72 ' 70 on the respective drive mechanism group, static drafting system roller with quite high moment of inertia motor shaft 78,78 ' on produce a quite low virtual value, and virtual value significantly reduce to be to realize by the conveyer 58 and 70 on the roller side of clutch.

Initial rest the axle and moved between the axle, in order to make this speed that relatively rotates during its connection procedure, keep as far as possible little, then with higher motor speed by belt transmission 72,72 ' be reduced to than low value, like this, during it connected, the angular difference error can be avoided.

Can select the velocity of rotation of motor according to following criterion for use:

-for asynchronous for fear of it in the connection procedure, the rotational energy that is created on the motor rotor should be big as much as possible;

-be higher than predetermined feeding during frequency, the AC motor is at first connected, this motor be higher than predetermined feeding can be controlled during frequency;

-being higher than predetermined feeding during frequency, reluctance motor is at first connected, and on its frequency, this motor is synchronous certainly.

Electronic velocity of rotation corresponding to about 5Hz will satisfy this criterion usually.

Because these measures, this inertia effective torque that just guarantees new load is little with respect to the moment of inertia of motor, and at least can be by solution that motor overcomes, and its moment is preferably very little, can ignore.Overcome accelerating weight for making, this has just caused an economic especially solution, and motor size overlength significantly not.

This relative slow-speed of revolution is final connect after soon, increase needed frequency by Electronic Control 40, for example,, can make spinning machine drive unit and its work velocity of rotation synchronous like this according to the preset program curve that runs up.

Gradually the control period that slows down at ring spinner 10, the velocity of rotation of relevant drive motors 20-26,30-36 drop to can give fixed minimum speed after, two drafting systems 20 ', 30 ' at first drive units from them are separated from, according to the just out of gear mesh moment of drafting system, has big effective persistent spindle 16 ' be braked.After leaving drive system, because effective persistence of drafter roller is reduced to minimum (comparing with spindle), especially owing to be configured in the friction of gearratio and existence between associated drive motor and the roller, general drafting system 20 ', 30 ' can stop immediately.The braking of spindle can adapt with the motor program of drafting system.After the beginning of braking procedure can or be separated from constantly before it is separated from constantly, and occur in the out of gear mesh moment simultaneously.For arbitrary practical especially embodiment,, be necessary to do the test of some for selecting its most favourable moment.

All drawing-off units preferably are separated from from relevant drive system 12 simultaneously.

Rotating speed or loading speed, and rotating ratio or speed ratio were adjusted by electronic-controlled installation 40 before this out of gear mesh process at least in advance.For example,, suppose in this case that can be provided with and gradually stop control accordingly, so that control-driven system 12,14 gradually stops, and rotating ratio and deceleration that maintenance can be scheduled to drop to minimum speed at least at the power supply intercourse.

In the present embodiment, spindle 16 ' still be connected in relevant drive unit 16.

It is braked static after, also can advantageously provide measure, spindle is fixed on its end position.This end position can be scheduled to.Spindle 16 ' can be by friction stopping device 38 is electronic and/or mechanically be braked.

In order to make control simple as far as possible, and control gradually stops to drop to the rotation minimum speed, and each device of the drive unit 16-36 of two drive systems 12,14 relevant with load is formed by a motor, and its speed is to control by the frequency of feeding.Make rotating speed control by converter 52 to 56 and frequency changer 44 by electronic-controlled installation 40, decisive factor is the minimum speed of motor, this motor is associated with the drafter roller and by its speed state of FREQUENCY CONTROL of feeding, with this frequency of feeding, this motor is guaranteed with the frequency of feeding.

Claims (24)

1, a kind of weaving loom, particularly a kind of ring spinner (10) or flyer spinning machine, which comprises at least a drafting system (20 ', 30 '), this drafting system has some drafter groups, between two corresponding drafter groups, forms at least one drawing-off zone, each drafter group has respectively independently drive motors, especially speed control drive motors (20～26; 30～36), motor is associated with at least two drafter groups, drive motors by friction clutch (62,62 ') can with the driven roller (60 of relevant drafter group; 76) be connected, this clutch can be by an electronic-controlled installation (40) jointly by switch, between corresponding driving motor and associated driven roller, has a transmission device (72,58 at least, 72 ', 70) be installed in the driving mechanism group, it is characterized in that, each clutch (62,62 ') be installed in two transmission devices (72,58; 72 ' 70) between; Transmission device (58; 70) be mounted in clutch (62; 62 ') with relevant driven roller (60; 68) between, this driven roller has gearratio so that with the operation drive motors (20～26; 30～36) during the combination, the moment that rotates on the different clutches on the load-side especially causes to have corresponding to driven roller (60 desirable drawing-off, that have the substantially constant rotating ratio at least; 76) speed rises, and this ideal drawing-off can be passed through electronic-controlled installation (40) and frequency changer (52; 54; 56) select to regulate.

2,, it is characterized in that being installed in clutch (62 according to the weaving loom of claim 1; 62 ') with the driven roller (60 that is associated; 76) transmission device (58 between; 70) gearratio is chosen such that so that at different clutches (62; 62 ') the output loading side obtain basic identical at least, and moment particularly through reducing.

3,, it is characterized in that the type and/or the size of the clutch that provided is identical according to the weaving loom of one of aforementioned claim.

4, according to the weaving loom of one of above-mentioned claim, it is characterized in that comprising clutch (62; 62 ') the driving mechanism group so discharge and clutch (62; 62 ') can be controlled, so that identical connection and out of gear mesh time are short as far as possible.

5, a kind of weaving loom, particularly a kind of RING SPINNING loom, has the drive system that at least one is used to drive load, its load at least a portion has different effective persistence, especially resemble spindle, drafting system, rings or similar load, especially, according to one of above-mentioned claim, it is characterized in that, at least a portion load (20 '; 30 ') after the rotating speed of the drive unit that is associated (20～36) drops to the minimum speed of being scheduled to of these drive units, can be separated from from the drive unit that is associated; With and have at least property load (16 ') that maximum effectively holds according to relevant load (20 '; 30 ') the out of gear mesh time is braked.

6, according to the weaving loom of claim 5, it is characterized in that, have maximum effective persistent load (16 ') at least basically the load that is associated (20 '; 30 ') the out of gear mesh time can be braked.

7, according to the weaving loom of claim 5 or 6, it is characterized in that having maximum effective persistent load (16 ') and keep coupling with the drive unit 16 that is associated.

8, according to the weaving loom of one of above-mentioned claim, it is characterized in that having maximum effective persistent load (16 ') and be braked after static, can be fixed on its end position at it.

9, weaving loom according to Claim 8 is characterized in that, end position can be preset.

According to the weaving loom of one of above-mentioned claim, it is characterized in that 10, having maximum effective persistent load (16 ') can be by electrodynamic braking.

11, according to the weaving loom of one of above-mentioned claim, it is characterized in that, a friction stopping device (38) with have maximum effective persistent load (16 ') and be associated.

12, according to the weaving loom of one of above-mentioned claim, it is characterized in that, with load (16 '～20 '; 30 ') the respective drive system (12 that is associated; 14) drive unit (16～36), its each is formed by a motor, this motor comes control rate by the frequency of feeding.

13, according to the weaving loom of one of above-mentioned claim, it is characterized in that, load (16 '～20 '; 30 ') and the drive motors (20～26 that is associated with load; 30～36) connection between is with drive motors (20～26; 30～36) predetermined minimum speed can connect or interrupt, with this minimum speed, and this drive motors (20～26; Being guaranteed synchronously 30～36), the frequency changer (52 of the speed of this drive motors by having the frequency of feeding; Feeding frequency and control 54).

According to the weaving loom of one of above-mentioned claim, it is characterized in that 14, having maximum effectively persistent load of braking is spindle (16 ').

15, the weaving loom that one of requires according to aforesaid right is characterized in that, at least one have low relatively persistence load (60), especially at least one drafter (20 '; 30 ') the drafter group, by a clutch (62; 62 ') can be separated from from the drive unit (20～36) that is associated, maybe can be connected on the drive unit (20～36) that is associated.

16, the weaving loom that one of requires according to aforesaid right, it is characterized in that, with have the drive unit 16 that maximum effective persistent load (16 ') is associated and comprise a motor, when power interruption, this motor as an engine with at least one other drive unit of power supply.

17, according to the weaving loom of one of above-mentioned claim, it is characterized in that drive system (12; 14) comprise independently drive unit (16～36), to be used for fractional load at least (16～20; 30 '); An electronic control system is associated with drive system; Velocity of rotation or loading speed, and rotate speed ratio or speed ratio can be adjusted in advance by this electronic-controlled installation.

18, according to the weaving loom of one of above-mentioned claim, it is characterized in that electronic-controlled installation 40 comprises a gradually fixed-position stop control apparatus, so that in order to control drive motors (20～26; 30～36) be reduced to low regime at least, this control is preferably in during the power interruption, and this moment is by frequency changer (52; 54; 56) or similar device keep the rotation speed ratio be scheduled to.

19, according to the weaving loom of claim 18, it is characterized in that, drafter (20 '; 30 ') drive unit (20～26; 30～36) can controlled reduction of speed to drafter roller (60; 68; 66) and/or drive unit (20～26; 30～36; 18) predetermined minimum rotation speed; The drafter roller (60 of ring spinner; 68; 66), and preferably also have ring rail 18 ', be separated from from the drive unit that is associated by clutch (62,62 ').

20, according to the weaving loom of one of above-mentioned claim, it is characterized in that flute profile belt drive (72; 72 ') and/or gear drive (58; 70) be located at load (60; 76) with relevant drive unit (20; 36) on the driving mechanism group between, flute profile belt drive unit (72,72 ') preferably is installed in drive unit (20; 36) with corresponding clutch (62; 62 ') between, and gear drive (58; 70) preferably be installed in load (60,76), corresponding drafter roller especially is with clutch (62; 62 ') between.

21, according to the weaving loom of one of above-mentioned claim, it is characterized in that brake apparatus (64) is installed on the driving mechanism group that is associated with outlet roller (60), be preferably between clutch (62) and the roller side transmission device 58.

22, according to the weaving loom of one of above-mentioned claim, it is characterized in that driven roller (60,68,66) extends on a series of spinning positions of the respective side of whole weaving loom; Two drive motors (20,22; 34,36) with at least two driven rollers (60; 76) each is associated, and is installed in the two ends of driven roller.

23, according to the weaving loom of claim 22, it is characterized in that, in all cases, two drive motors and all driven rollers (60; 68; 66) be associated, and be installed in their two ends.

24, according to the weaving loom of claim 22 or 23, it is characterized in that corresponding drafter group or driven roller (60,66; 68) be divided into two groups of parts again, arrange according to the order of sequence in the vertical, wherein drive motors (20～26; 30～36) each can be passed through corresponding clutch (62; 62 ') be connected with corresponding this group part.

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