CN109735977B

CN109735977B - Alternating drafting five-channel spinning device and spinning method of variable-count variable-ratio variable-twist yarn

Info

Publication number: CN109735977B
Application number: CN201910192330.8A
Authority: CN
Inventors: 徐志武; 薛元; 曾德军; 修身; 于健
Original assignee: Anhui Xinya New Material Co ltd; Jiangnan University
Current assignee: Anhui Xinya New Material Co ltd; Jiangnan University
Priority date: 2019-03-13
Filing date: 2019-03-14
Publication date: 2023-09-19
Anticipated expiration: 2039-03-14
Also published as: CN109735977A

Abstract

The invention provides an alternating drafting five-channel spinning device and a spinning method of variable count ratio variable twist yarn, wherein the spinning device comprises a first channel, a second channel, a third channel, a fourth channel and a fifth channel, middle rollers and rear rollers of the same channel are synchronously variable relative to a front roller, the middle rollers and rear rollers of different channels are alternately variable relative to the front roller, the front roller generates speed change relative to a spindle, and the count change, the proportion change and the twist change of the formed yarn are realized by alternating drafting of five groups of roves and alternating twisting of the formed yarn. The invention has exquisite conception, greatly reduces the breakage rate or the singular point rate of the yarn, has more stable drafting and twisting process and greatly reduces the labor intensity of workers.

Description

Alternating drafting five-channel spinning device and spinning method of variable-count variable-ratio variable-twist yarn

Technical Field

The invention relates to the technical field of spinning in textile engineering, in particular to an alternating drafting five-channel spinning device and a spinning method of variable-count variable-ratio variable-twist yarn.

Background

Fancy yarns, spun-dyed yarns and slub yarns which are greatly emerging in recent years are mainly characterized by dynamic changes of structural parameters during spinning compared with traditional yarns. The conventional spinning equipment is difficult to adapt to spinning production of fancy yarn, colored spun yarn and slub yarn. How to improve the flexibility of spinning production, and better process the yarn with dynamic change of structural parameters, and realizing the flexible processing of spinning has become an important subject for improving the spinning machine.

The flexibility of the spinning production system mainly comprises three aspects: first is the color of the formed yarn can be arbitrarily changed during spinning and a full color spectrum melange yarn is produced? -a yarn color control mechanism is to be constructed; secondly, can the thickness of the formed yarn be changed arbitrarily during the spinning process? -a yarn thickness regulation mechanism is required to be constructed; thirdly, whether the twist of the formed yarn can be adjusted (the twist coefficient is constant) according to the change of the thickness in the spinning process? Constructing a twist regulation mechanism; fourth, can the color, thickness, twist of the formed yarn be arbitrarily changed? The regulation mechanism of yarn color, thickness and twist in the spinning forming process is required to be constructed. Solving the problems is a key link for realizing the intellectualization of spinning.

The problems of the prior art are summarized as follows:

1. the existing siro spinning technology cannot be controlled on line into yarn density, blending ratio and twist;

2. although the yarn density can be changed, the yarn density, the blending ratio and the twist degree cannot be accurately regulated and controlled;

3. the linear density and the blending ratio are mainly regulated and controlled by regulating the rotating speed of the rear roller, when the blending ratio of one channel is changed within the range of 75% -100%, the blending ratio of the other channel is changed within the range of 25% -0%, and the draft ratio (namely the speed ratio between the rear roller and the middle roller) of the rear region is changed within the range of 1.35- ++, so that the evenness of the spun yarn is greatly deteriorated and the spun yarn is easy to break.

Blending ratio in a certain channel (e.g. second channel)When it is, the draft ratio in the rear zone +.>At this time, the speed of the back roller of the channel is zero, the front and middle rollers still keep the original rotation speed, the fast fiber held by the middle roller is separated from the static fiber held by the back roller to form a drafting singular point, the drafting singular point appearing in the back drafting zone is any point randomly distributed between the middle and back rollers, the point is far from the middle roller jaw distance ∈>（/>Equal to the gauge of the middle and rear rollers). When the blending ratio starts to increase from 0% at the next moment, the roving head end held by the back roller must be fed into the middle roller jaw again from the singular point position to enable the back zone draft to function. Due to the distance of the drafting singular point from the front roller nip +.>So the time of feeding the roving head end into the middle roller jaw is uncertainFactors, if not well matched, either generate rough details or lead to spinning breakage, make the double-channel spinning an unstable process, and influence the reliability of spinning and the quality of finished yarn.

Disclosure of Invention

The invention aims to provide an alternating drafting five-channel spinning device and a spinning method of variable-count variable-ratio variable-twist yarn, which aim to solve at least one technical problem in the prior art.

In order to solve the technical problems, the invention provides an alternating drafting five-channel spinning device, which comprises a first channel for passing through a first component roving, a second channel for passing through a second component roving, a third channel for passing through a third component roving, a fourth channel for passing through a fourth component roving and a fifth channel for passing through a fifth component roving;

the first channel is sequentially provided with a first back roller, a first middle roller and a front roller, the first back roller is connected with the first middle roller through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the first middle roller and the first back roller constant and not more than 1.4;

the second channel is sequentially provided with a second rear roller, a second middle roller and the front roller; the second rear roller and the second middle roller are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the second middle roller and the second rear roller constant and not more than 1.4;

the third channel is sequentially provided with a third rear roller, a third middle roller and the front roller; the third rear roller and the third middle roller are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the third middle roller and the third rear roller constant and not more than 1.4;

The fourth channel is sequentially provided with a fourth rear roller, a fourth middle roller and the front roller; the fourth rear roller and the fourth middle roller are connected through a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fourth middle roller and the fourth rear roller constant and not more than 1.4;

a fifth rear roller, a fifth middle roller and the front roller are sequentially arranged on the fifth channel; the fifth rear roller and the fifth middle roller are connected through a fifth transmission gear set, and the fifth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fifth middle roller and the fifth rear roller constant and not more than 1.4;

the middle roller and the rear roller of the same channel are synchronously variable relative to the front roller, the middle roller and the rear roller of different channels are alternately variable relative to the front roller, the front roller generates speed change relative to the spindle, and the count change, the proportion change and the twist change of the formed yarns are realized by alternating drafting of five groups of roves and alternating twisting of the formed yarns.

In the invention, a primary drawing unit (namely a first drawing zone or a rear zone) is formed between the middle roller and the rear roller, the front roller and the middle roller form a secondary drawing unit (namely a second drawing zone or a front zone), the speed ratio of the middle roller and the rear roller of the same channel is constant and less than 1.4, the speed ratio is synchronously changed relative to the front roller, and the speed ratio of the middle roller and the rear roller of different channels is alternately changed relative to the front roller, so that the alternating drawing of three groups of rough yarns is realized. Two-stage drafting For dynamic main draft, the speed of the middle roller is varied relative to the front roller.

Of particular importance, the first draft is pre-draft, the first draft ratioFor constant C, constant draft, draft ratio of first-order draft +.>The continuity of the roving can be ensured, and no drafting singular point is generated in the first drafting zone. Meanwhile, the fiber in the roving can be straightened, tensioned and oriented in the pre-drafting process, so that the preparation of sliding in the main drafting process is finished, and the breakage rate or the singular point rate in the main drafting process is reduced.

Wherein preferably, an upper leather roller is arranged above the middle roller in each channel, and the spinning device further comprises an upper leather ring sleeved on the middle upper leather roller and the upper pin and kept in synchronous motion with the middle roller, and a lower leather ring sleeved on the middle roller and the lower pin and kept in synchronous motion with the middle roller; the distance between the holding jaws of the upper leather collar and the lower leather collar and the jaw line of the front roller is less than 3mm.

Further, when the blending ratio K=0% of the roving in one of the five channels, the secondary draft ratio e of the roving in the channel is obtained _q When in = ≡, the channel roving forms a drafting singular point in the second drafting zone, the distance delta between the drafting singular point and the front roller jaw is less than or equal to 3mm, when When the spinning machine is gradually increased, along with synchronous starting of the rear roller and the middle roller, the fiber strands held by the upper leather collar and the lower leather collar are instantaneously fed into a jaw of the front roller to carry out secondary drafting, so that the drafting singular point positioned in the secondary drafting zone does not influence the stability of spinning. In the prior art, the gauge between the rear roller and the middle roller is generally larger than 25mm, the drafting singular point positions in the first drafting zone are randomly distributed between the middle roller and the rear roller, when the drafting singular point distance exceeds 3mm, the time for feeding the drafting singular point into the middle roller jaw again has uncertain factors, if the drafting singular point is not well matched, coarse details are generated, or spinning breakage is caused, so that spinning becomes an unstable process, and the reliability and the yarn forming quality of spinning are affected.

Further, the device also comprises a rear roller shaft and a middle roller shaft; in the circumferential direction of the rear roller shaft, the first rear roller is sleeved on the rear roller shaft in a relatively fixed manner, and the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller are sleeved on the rear roller shaft in a relatively rotatable manner;

in the circumferential direction of the middle roller shaft, the second middle roller is sleeved on the middle roller shaft in a relatively fixed manner, and the first middle roller, the third middle roller, the fourth middle roller and the fifth middle roller are sleeved on the middle roller shaft in a relatively rotatable manner;

The rear roller shaft and the middle roller shaft are used for respectively regulating and controlling the feeding speeds of the first component roving and the second component roving.

Further, the first transmission gear set comprises a first driving gear, a first carrier gear and a first driven gear which are sequentially meshed for transmission; the first driving gear is fixedly connected with the first rear roller in a coaxial manner, and the first driven gear is fixedly connected with the first middle roller in a coaxial manner;

the second transmission gear set comprises a second driving gear, a second carrier gear and a second driven gear which are sequentially meshed for transmission; the second driving gear is fixedly connected with the second middle roller in a coaxial manner, and the second driven gear is fixedly connected with the second rear roller in a coaxial manner;

the third transmission gear set comprises a third driving gear, a third bridging gear and a third driven gear which are sequentially meshed for transmission; the third driving gear is fixedly connected with the third middle roller in a coaxial manner, and the third driven gear is fixedly connected with the third rear roller in a coaxial manner;

the fourth transmission gear set comprises a fourth driving gear, a fourth bridging gear and a fourth driven gear which are sequentially meshed for transmission; the fourth driving gear is fixedly connected with the fourth middle roller in a coaxial manner, and the fourth driven gear is fixedly connected with the fourth rear roller in a coaxial manner;

The fifth transmission gear set comprises a fifth driving gear, a fifth bridging gear and a fifth driven gear which are sequentially meshed for transmission; the fifth driving gear is fixedly connected with the fifth middle roller in a coaxial mode, and the fifth driven gear is fixedly connected with the fifth rear roller in a coaxial mode.

Further, a first auxiliary shaft is also included;

in the circumferential direction, the third carrier gear is sleeved on the first auxiliary shaft relatively fixedly; the first, second, fourth and fifth intermediate gears are rotatably journalled on the first auxiliary shaft.

Further, the device also comprises a second auxiliary shaft and a third auxiliary shaft which are respectively arranged in parallel with the first auxiliary shaft, and a transmission gear which is meshed with the fourth bridge gear for transmission is fixedly sleeved on the second auxiliary shaft; and a transmission gear meshed with the fifth intermediate gear is fixedly sleeved on the third auxiliary shaft.

Therefore, the feeding speeds of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving can be respectively controlled through the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft.

Specifically, the first back roller, the first middle roller, the second back roller, the second middle roller, the third back roller, the third middle roller, the fourth back roller, the fourth middle roller, the fifth back roller and the fifth middle roller are nested rollers; the first rear roller is fixedly sleeved on a rear roller shaft through a key, and the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller are rotatably sleeved on the rear roller shaft;

the second middle roller is fixedly sleeved on a middle roller shaft through a key, and the first middle roller, the third middle roller, the fourth middle roller and the fifth middle roller are rotatably sleeved on the middle roller shaft; the third intermediate gear is fixedly sleeved on the first auxiliary shaft through a key; the first, second, fourth and fifth intermediate gears are rotatably journaled on the first auxiliary shaft.

Of course, the driving modes of the rear roller and the middle roller on different channels are not limited to the above modes, for example, a leather collar for belt transmission is arranged on the rear roller or the middle roller on each channel, and the leather collar is connected with a servo motor through a belt transmission mechanism; or the rear roller or the middle roller on each channel is respectively and independently provided with a transmission gear structure, and is connected with a servo motor through a speed reducing mechanism. For another example, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft can be coaxially arranged, the third passing gear, the fourth passing gear and the fifth passing gear are fixedly sleeved on the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft respectively, and the feeding speeds of the third component roving, the fourth component roving and the fifth component roving can be directly controlled through the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft respectively.

Further, the first back roller, the first middle roller, the second back roller, the second middle roller, the third back roller, the third middle roller, the fourth back roller, the fourth middle roller and the front roller are respectively and correspondingly provided with an upper leather roller above the front roller, and the upper leather roller is matched with the roller below to clamp yarns.

Further, the device also comprises a control system and a servo driving system;

the servo driving system comprises a servo driver and a servo motor;

the control system comprises a controller (preferably a PLC programmable controller) and a rotating speed sensor;

the controller is connected with the servo motor through a servo driver in sequence;

the servo motor includes: the device comprises a first servo motor for driving the rear roller shaft to rotate, a second servo motor for driving the middle roller shaft to rotate, a third servo motor for driving the first auxiliary shaft to rotate, a fourth servo motor for driving the second auxiliary shaft to rotate, a fifth servo motor for driving the third auxiliary shaft to rotate and a front servo motor for driving the front roller to rotate;

the rotational speed sensor includes: the device comprises a first sensor for monitoring the rotating speed of the rear roller shaft, a second sensor for monitoring the rotating speed of the middle roller shaft, a third sensor for monitoring the rotating speed of the first auxiliary shaft, a fourth sensor for monitoring the rotating speed of the second auxiliary shaft, a fifth sensor for monitoring the rotating speed of the third auxiliary shaft and a front sensor for monitoring the rotating speed of the front roller.

The controller in the invention sequentially controls the feeding speeds of five component rovings on the five yarn channels through the servo driver and the servo motor, the rotating speed sensor monitors the actual feeding speeds of the five groups of rovings in real time, the monitoring value is fed back to the controller, and the controller can adjust the magnitude of control signals on the five yarn channels according to the monitoring value.

Further, the device also comprises a twisting mechanism, wherein the twisting mechanism also comprises a special pipe and a grid ring; five strands of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving are gathered into one strand through a gathering groove of the special pipe after passing through the front roller, and then are twisted and wound through a ring to form the yarn.

Further, the twisting mechanism comprises a ring plate and a spindle;

the controller controls the ring plate to rotate through a servo driver and a servo motor, and is connected with the spindle through a frequency converter and an alternating current motor; and further comprising a sixth sensor for monitoring the spindle rotation speed.

Further, the device also comprises a twisting-resistant leather roller arranged above the special pipe; the front upper leather roller is arranged above the front roller, and the twisting-resistant leather roller rotates along with the front upper leather roller in the same direction through the sixth transmission gear set.

Further, the sixth transmission gear set comprises a sixth driving gear, a sixth carrier gear and a sixth driven gear which are sequentially meshed for transmission; the sixth driving gear is fixedly connected with the coaxial center of the front epithelial roller, and the sixth driven gear is fixedly connected with the coaxial center of the twist resisting leather roller.

The transmission ratio of the sixth transmission gear set is 0.741-0.909, so that the draft ratio between the twist-retarding leather roller and the front epithelial roller is 1.1-1.35, the sliver gathering effect is improved through the micro draft ratio of the gathering zone, and the straightening degree and the orientation degree of fibers in yarns are further improved.

In addition, the control system includes a series of instructions and a modular program.

Further, the control system further comprises a first comparison module, the first comparison module is respectively connected with the first sensor, the second sensor, the third sensor, the fourth sensor, the fifth sensor and the controller, the first comparison module is used for monitoring the rotation speed ratio among the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft, and the controller regulates and controls the rotation speed of one or a plurality of the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft according to the numerical value fed back by the first comparison module, so as to regulate and control the blending ratio among the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving.

In order to accurately and rapidly realize yarn blending ratio regulation and control, the invention directly regulates and controls according to the numerical value fed back by the first comparison module, even if the rotating speeds of the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft or the third auxiliary shaft respectively exceed the set error range due to various error reasons, the invention can continue to produce without additionally regulating the actual rotating speeds of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft or the third auxiliary shaft as long as the rotating speed ratio of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft fed back by the first comparison module (namely, the feeding speed ratio of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving) is ensured to be in the set error range. Compared with the prior art, the invention only needs to monitor one parameter compared with the prior art that a plurality of parameters such as the middle roller and the back roller in different channels are monitored simultaneously, the invention widens the regulation precision of the middle roller and the back roller, increases the redundancy of system control, highlights the importance of the rotation speed ratio of the upper roller of different channels, greatly improves the control precision of the blending ratio of yarns while greatly reducing the workload of the controller processing, and in addition, avoids the shutdown or adjustment time in the production process, and improves the production efficiency of equipment by more than 30 percent.

Further, the control system also comprises a second comparison module which is respectively connected with the first sensor, the front sensor and the controller;

the second comparison module is used for monitoring the rotation speed ratio between the rear roller shaft and the front roller, further monitoring the draft ratio of the first component roving, and the controller regulates and controls the rotation speed of the rear roller shaft or the front roller according to the numerical value fed back by the second comparison module, further regulating and controlling the draft ratio of the first component roving.

Further, the control system also comprises a third comparison module which is respectively connected with the second sensor, the front sensor and the controller;

the third comparison module is used for monitoring the rotation speed ratio between the middle roller shaft and the front roller, further monitoring the draft ratio of the second component roving, and the controller regulates and controls the rotation speed of the middle roller shaft or the front roller according to the numerical value fed back by the third comparison module, further regulating and controlling the draft ratio of the second component roving.

Further, the control system also comprises a fourth comparison module which is respectively connected with the third sensor, the front sensor and the controller;

The fourth comparison module is used for monitoring the rotation speed ratio between the first auxiliary shaft and the front roller, further monitoring the draft ratio of the third component roving, and the controller regulates the rotation speed of the first auxiliary shaft or the front roller according to the numerical value fed back by the fourth comparison module, further regulating the draft ratio of the third component roving.

Further, the control system further comprises a fifth comparison module, wherein the fifth comparison module is respectively connected with the fourth sensor, the front sensor and the controller;

the fifth comparison module is used for monitoring the rotation speed ratio between the second auxiliary shaft and the front roller, further monitoring the draft ratio of the fourth component roving, and the controller regulates the rotation speed of the second auxiliary shaft or the front roller according to the numerical value fed back by the fifth comparison module, further regulating the draft ratio of the fourth component roving.

Further, the control system further comprises a sixth comparison module, wherein the sixth comparison module is respectively connected with the fifth sensor, the front sensor and the controller;

the sixth comparison module is used for monitoring the rotation speed ratio between the third auxiliary shaft and the front roller, further monitoring the draft ratio of the fifth component roving, and the controller regulates the rotation speed of the third auxiliary shaft or the front roller according to the numerical value fed back by the sixth comparison module, further regulating the draft ratio of the fifth component roving.

In order to accurately and rapidly realize yarn blending ratio regulation, the invention directly monitors the draft ratio of the first component roving according to the numerical value fed back by the second comparison module, wherein even if the rotating speeds of the rear roller shaft and the front roller respectively exceed the set error range due to various error reasons, the actual rotating speeds of the rear roller shaft and the front roller can be continuously produced without additionally adjusting the rotating speeds of the rear roller shaft and the front roller as long as the rotating speed ratio of the rear roller shaft and the front roller fed back by the second comparison module is ensured to be within the set error range. The processing workload of the controller is greatly reduced, and meanwhile, the control precision of the drafting ratio and the linear density of the yarn is greatly improved. The third comparison module, the fourth comparison module, the fifth comparison module and the sixth comparison module have similar functions and are not described in detail.

The comparison module may be a prior art, may be an existing comparator or integrated comparison circuit, or may be a comparison module in the form of software in the controller CUP.

The sensor is also in many forms, for example, a photoelectric encoder or a hall rotation speed sensor, etc.

By adopting the technical scheme, the invention has the following beneficial effects:

the alternating drafting five-channel spinning device provided by the invention has exquisite conception, greatly reduces the breakage rate or the singular point rate of yarns, has more stable drafting and twisting processes, and greatly reduces the labor intensity of workers.

In addition, the speed of the auxiliary shaft, the rear roller and the middle roller relative to the front roller is coordinated and controlled by a PLC, and the on-line change of the yarn thickness and the blending ratio is realized through the alternating drafting of five roves. The front roller and spindle speed are coordinated and controlled by a PLC to realize the online change of the twist of the finished yarn. Thus, a textured, and textured yarn is spun.

In addition, the invention also discloses a spinning method of the variable count variable ratio variable twist yarn, which comprises a five-channel drafting system, wherein the speed ratio of the middle roller and the rear roller of the same channel is constant and less than 1.4, the speed of the middle roller and the rear roller is synchronously changed relative to the front roller, the speed of the front roller is changed relative to the spindle, and the count change, the proportion change and the twist change of the formed yarn are realized by alternating drafting of five groups of roves and alternating twisting of the formed yarn.

The following describes the structural parameters of the yarn formed by the alternating-drafting four-channel numerical control spinning system in the implementation

Let the linear density of five rovings be respectively. In an alternating draft digital control spinning system, the speeds of a front roller, a middle roller, a rear roller, a first auxiliary shaft, a second auxiliary shaft and a third auxiliary shaft are functions of time, and are respectively expressed by +. >、/>、/>、/>To indicate that the linear density, the blend ratio and the twist of the spun yarn are also functions of time by +.>、And (3) representing.

1. Speed of feeding roving into each channel

Five nested back rollers corresponding to the five channels are respectively composed of a back roller shaft, a middle roller shaft, a first auxiliary shaft, a second auxiliary shaft and a third auxiliary shaft, and the feeding speeds of the five nested back rollers are respectively as follows:。

2. draft multiple of each channel

As shown in fig. 1, the middle roller and the rear roller of the middle first channel, the middle roller and the rear roller of the second channel, the middle roller and the rear roller of the third channel, the middle roller and the rear roller of the fourth channel and the middle roller and the rear roller of the fifth channel are connected by corresponding carrier gears. Setting the back zone draft ratio, the front zone draft ratio and the total draft ratio of the first channel as follows:the method comprises the steps of carrying out a first treatment on the surface of the The back zone draft ratio, the front zone draft ratio and the total draft ratio of the second channel are respectively:the method comprises the steps of carrying out a first treatment on the surface of the The back zone draft ratio, the front zone draft ratio and the total draft ratio of the third channel are respectively: />The method comprises the steps of carrying out a first treatment on the surface of the The back zone draft ratio, the front zone draft ratio and the total draft ratio of the fourth channel are respectively: />The method comprises the steps of carrying out a first treatment on the surface of the The back zone draft ratio, the front zone draft ratio and the total draft ratio of the fifth channel are respectively: />。

The back draft ratio, the front draft ratio and the total draft ratio of the first channel are respectively:

(1)

(2)

(3)

The formulas (1), (2) and (3) show that the back zone draft multiplier of the first channel is constant, and the front zone draft multiplier and the total draft multiplier of the first channel can be realized by regulating and controlling the speeds of the back roller and the front roller through a PLC.

The back zone draft ratio, the front zone draft ratio and the total draft ratio of the second channel are respectively:

(4)

(5)

(6)

the formulas (4), (5) and (6) show that the back zone draft multiplier of the second channel is constant, and the front zone draft multiplier and the total draft multiplier of the second channel can be realized by regulating the speeds of the auxiliary roller 1 and the front roller through a PLC.

The back zone draft ratio, the front zone draft ratio and the total draft ratio of the third channel are respectively:

(7)

(8)

(9)

the formulas (7), (8) and (9) show that the back zone draft multiplier of the third channel is constant, and the front zone draft multiplier and the total draft multiplier of the third channel can be realized by regulating the speeds of the auxiliary roller 2 and the front roller through a PLC.

The back zone draft ratio, the front zone draft ratio and the total draft ratio of the fourth channel are respectively:

(10)

(11)

(12)

the formulas (10), (11) and (12) show that the back zone draft multiplier of the fourth channel is constant, and the front zone draft multiplier and the total draft multiplier of the fourth channel can be realized by regulating the middle roller and front roller speeds through a PLC.

The back zone draft ratio, the front zone draft ratio and the total draft ratio of the fifth channel are respectively:

(13)

(14)

(15)

The formulas (13), (14) and (15) show that the back zone draft multiplier of the fifth channel is constant, and the front zone draft multiplier and the total draft multiplier of the fifth channel can be realized by regulating the middle roller and the front roller speeds through a PLC.

3. Blending ratio of spun yarn

The blending ratio of the five-channel input roving fiber in the yarn is respectively as follows:

(16)

(17)

(18)

(19)

(20)

4. the linear density of the spun yarn was:

(21)

5. twist of spun yarn:

setting spindle rotation speed asThe winding radius of the bobbin is +.>The yarn twist formed by ring twisting is:

(22)

from the above analysis, the linear density of the spun yarn can be controlled by PLC controlling the speeds of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft, the third auxiliary shaft, the front roller and the spindleBlending ratioTwist->The yarn structure parameter is regulated and controlled by changing the yarn structure parameter according to a set rule.

When spinning, the count, blending ratio and twist of the formed yarn are all changed on line along with time, so that the yarn with variable count, ratio and twist is formed. The rotation speeds of the drafting roller and the spindle are respectivelyThe linear density, the blending ratio, the twist of the spun yarn are also functions of time and can be expressed as +.>、/>、/>. If +.f. of a certain point p on the yarn is known >、/>The speeds of the back roller, the first auxiliary shaft, the second auxiliary shaft, the third auxiliary shaft and the middle roller at corresponding moments and the structural parameters of the spun yarn at the moment can be obtained by the carrying-in type (16) - (22) as follows:

(23)

（24）

（25）

（26）

(27)

(28)

(29)

(30)

(31)

(32)

(33)

(34)

from this, the speeds of the first auxiliary shaft, the second auxiliary shaft, the third auxiliary shaft, the rear roller shaft, the middle roller shaft, the front roller shaft and the spindle are controlled by the PLC、/>The linear density of the formed yarn can be controlled on line>Blending ratioTwist->And (3) changing according to a specified rule so as to spin the yarn with variable count, variable ratio and variable twist.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an alternate drafting five-channel spinning device provided in embodiment 1 of the present invention;

FIG. 2 is a schematic diagram showing the transmission relation of the drawing section in the spinning apparatus of example 1;

FIG. 3 is a schematic diagram showing the transmission relationship between the first to third auxiliary shafts in embodiment 1;

fig. 4 is a side view of the alternating draft five channel spinning device provided in embodiment 1 of the present invention;

fig. 5 is a schematic circuit diagram of the alternating draft five channel spinning device in example 1 of the present invention;

fig. 6 is a circuit diagram of a comparison module of a spinning device in example 2 of the present invention.

Reference numerals:

Y ₁ -a first component roving; y is Y ₂ -a second component roving; y is Y ₃ -a third component roving; y is Y ₄ -a fourth component roving; y is Y ₅ -a fifth component roving; 41-a first rear roller; 42-a second rear roller; 43-a third rear roller; 44-a fourth rear roller; 45-a fifth back roller; 51-a first idler gear; 52-a second intermediate gear; 53-a third intermediate gear; 54-fourth intermediate gear; 55-a fifth intermediate gear; 61-a first middle roller; 62-a second middle roller; 63-a third middle roller; 64-a fourth middle roller; 65-a fifth middle roller; 70-front roller; 4-a rear roller shaft; 5-a first auxiliary shaft; 6-middle roller shaft; 7-a front roller shaft; 8-special-shaped tubes; 9-a second auxiliary shaft; 10-a third auxiliary shaft; 94-a transmission gear; 105-a transmission gear; 411-first drive gear; 421-a second passive gear; 431-third driven gear; 441-fourth driven gears; 451-fifth driven gears; 611-a first driven gear; 621-a second drive gear; 631-a third drive gear; 641-fourth drive gear; 651-fifth drive gear; p (P) ₄ -a rear upper leather roller; p (P) ₆ -a mid-epithelial roller; p (P) ₇ Front epithelial roller；P ₈ -a sixth carrier gear; p (P) ₉ -a twist-resistant skin roller; q (Q) ₁ -an upper apron; q (Q) ₂ -a lower apron; x is X ₁ -an upper pin; x is X ₂ -a lower pin.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "second," "first," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in FIGS. 1-3, the embodiment provides an alternate drafting five-channel spinning device, which comprises a first component roving Y ₁ First passage A therethrough ₁ B ₁ C ₁ D ₁ E. For the second component roving Y ₂ A second passage A therethrough ₂ B ₂ C ₂ D ₂ E. For the third component roving Y ₃ A third passage A therethrough ₃ B ₃ C ₃ D ₃ E and for the fourth component roving Y ₄ Fourth passage A therethrough ₄ B ₄ C ₄ D ₄ E and for a fifth component roving Y ₅ A fifth passage A therethrough ₅ B ₅ C ₅ D ₅ E。

The first channel is sequentially provided with a first back roller 41, a first middle roller 61 and a front roller 70, the first back roller 41 and the first middle roller 61 are connected through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the first middle roller 61 and the first back roller 41 constant and not more than 1.4; wherein, the first channel A ₁ B ₁ C ₁ D ₁ E comprises the following steps: drafting zone A ₁ B ₁ C ₁ And a collecting zone C ₁ D ₁ E, finishing the first component roving Y by the first back roller 41, the first middle roller 61, the front roller 70 and the special pipe 8 in sequence ₁ Is set in the drawing machine.

The second channel is provided with a second rear roller 42, a second middle roller 62 and a front roller 70 in sequence; the second back roller 42 and the second middle roller 62 are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the second middle roller 62 and the second back roller 42 constant and not more than 1.4; wherein the second channel A ₂ B ₂ C ₂ D ₂ E comprises the following steps: drafting zone A ₂ B ₂ C ₂ And a collecting zone C ₂ D ₂ E, finishing the second component roving Y by the second back roller 42, the second middle roller 62, the front roller 70 and the special tube 8 in sequence ₂ Is set in the drawing machine.

A third rear roller 43, a third middle roller 63 and a front roller 70 are sequentially arranged on the third channel; the third back roller 43 and the third middle roller 63 are connected by a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the third middle roller 63 and the third back roller 43 constantAnd is not greater than 1.4; wherein the third channel A ₃ B ₃ C ₃ D ₃ E comprises the following steps: drafting zone A ₃ B ₃ C ₃ And a collecting zone C ₃ D ₃ E, finishing the third component roving Y by the third rear roller 43, the third middle roller 63, the front roller 70 and the special pipe 8 in sequence ₃ Is set in the drawing machine.

The fourth channel is provided with a fourth rear roller 44, a fourth middle roller 64 and a front roller 70 in sequence; the fourth rear roller 44 and the fourth middle roller 64 are connected by a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fourth middle roller 64 and the fourth rear roller 44 constant and not more than 1.4; wherein the fourth channel A ₄ B ₄ C ₄ D ₄ E comprises the following steps: drafting zone A ₄ B ₄ C ₄ And a collecting zone C ₄ D ₄ E, finishing the fourth component roving Y by the fourth rear roller 44, the fourth middle roller 64, the front roller 70 and the special tube 8 in sequence ₄ Is set in the drawing machine.

The fifth channel is provided with a fifth rear roller 45, a fifth middle roller 65 and a front roller 70 in sequence; the fifth back roller 45 and the fifth middle roller 65 are connected through a fifth transmission gear set, and the fifth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fifth middle roller 65 and the fifth back roller 45 constant and not more than 1.4; wherein the fifth channel A ₅ B ₅ C ₅ D ₅ E comprises the following steps: drafting zone A ₅ B ₅ C ₅ And a collecting zone C ₅ D ₅ E, finishing the fifth component roving Y by the fifth rear roller 55, the fifth middle roller 65, the front roller 70 and the special pipe 8 in sequence ₅ Is set in the drawing machine.

The middle roller and the rear roller of the same channel are synchronously variable relative to the front roller 70, the middle roller and the rear roller of different channels are alternately variable relative to the front roller 70, the front roller 70 generates speed change relative to the spindle, and the count change, the proportion change and the twist change of the formed yarns are realized by alternating drafting of five groups of roves and alternating twisting of the formed yarns.

The first level of draft is pre-draft, the first level of draft ratioDraft ratio of first-order draft with constant C being constant draftThe continuity of the roving can be ensured, and no drafting singular point is generated in the first drafting zone. Meanwhile, the fiber in the roving can be straightened, tensioned and oriented in the pre-drafting process, so that the preparation of sliding in the main drafting process is finished, and the breakage rate or the singular point rate in the main drafting process is reduced.

As shown in fig. 4, the epithelial roller includes: rear upper leather roller P ₄ Middle epithelial roller P ₆ And front epithelial roller P ₇ . A twisting-resistant leather roller P is arranged above the special pipe 8 ₉ The method comprises the steps of carrying out a first treatment on the surface of the A front epithelial roller P is arranged above the front roller 70 ₇ Twist-resistant leather roller P ₉ Following the front epithelial roller P by a sixth drive gear set ₇ And (5) rotating in the same direction. Wherein the sixth transmission gear set comprises a sixth driving gear (not shown) and a sixth carrier gear P which are sequentially meshed for transmission ₈ And a sixth driven gear (not shown); the sixth driving gear is fixedly connected with the front upper leather roller in the same axis, and the sixth driven gear is fixedly connected with the twisting-resistant leather roller P ₉ Is fixedly connected with the same axle center. The gear ratio of the sixth transmission gear set is 0.741-0.909. The drafting ratio between the twisting-resistant leather roller and the front epithelial roller is 1.1-1.35, the strand gathering effect is improved through the micro-drafting ratio of the gathering area, and the straightening degree and the orientation degree of fibers in the yarns are further improved.

As shown in fig. 4, an upper middle roller P is respectively arranged above the middle roller in each channel ₆ The spinning device also comprises a middle epithelial roller P sleeved on the spinning device ₆ And upper pin X ₁ Upper apron Q capable of moving synchronously with middle roller ₁ Sleeved on the middle roller and the lower pin X ₂ Lower apron Q capable of moving synchronously with middle roller ₂ The method comprises the steps of carrying out a first treatment on the surface of the Upper leather collar Q ₁ And lower apron Q ₂ The distance between the holding jaw and the jaw line of the front roller is less than 3mm. Further, when the blending ratio K=0% of the roving in one of the five channels, the secondary draft ratio e of the roving in the channel is obtained _q When in = ≡, the channel roving is in the second tractionThe stretching region forms a drafting singular point, the distance delta between the drafting singular point and the jaw of the front roller 70 is less than or equal to 3mm whenWhen the spinning machine is gradually increased, along with synchronous starting of the rear roller and the middle roller, the fiber strands held by the upper leather collar and the lower leather collar are instantaneously fed into the jaw of the front roller 70 to carry out secondary drafting, so that the drafting singular point positioned in the secondary drafting zone does not influence the spinning stability.

In the circumferential direction of the rear roller shaft 4, the first rear roller 41 is sleeved on the rear roller shaft 4 relatively fixedly, and the second rear roller 42, the third rear roller 43, the fourth rear roller 44 and the fifth rear roller 45 are sleeved on the rear roller shaft 4 relatively rotatably; the front roller 70 is fixedly sleeved on the front roller shaft 7. In the circumferential direction of the middle roller shaft 6, the second middle roller 62 is sleeved on the middle roller shaft 6 relatively fixedly, and the first middle roller 61, the third middle roller 63, the fourth middle roller 64 and the fifth middle roller 65 are sleeved on the middle roller shaft 6 relatively rotatably; the rear roller shaft 4 and the middle roller shaft 6 are used for respectively regulating and controlling the feeding speeds of the first component roving and the second component roving.

The first transmission gear set comprises a first driving gear 411, a first carrier gear 51 and a first driven gear 611 which are sequentially meshed for transmission; the first driving gear 411 is fixedly connected with the first rear roller 41 coaxially, and the first driven gear 611 is fixedly connected with the first middle roller 61 coaxially; the second transmission gear set comprises a second driving gear 621, a second carrier gear 52 and a second driven gear 421 which are sequentially meshed for transmission; the second driving gear 621 is fixedly connected with the second middle roller 62 coaxially, and the second driven gear 421 is fixedly connected with the second rear roller 42 coaxially.

The third transmission gear set comprises a third driving gear 431, a third carrier gear 53 and a third driven gear 631 which are sequentially meshed for transmission; the third driving gear 631 is fixedly connected with the third middle roller 63 coaxially, and the third driven gear 431 is fixedly connected with the third rear roller 43 coaxially.

The fourth transmission gear set comprises a fourth driving gear 641, a fourth carrier gear 54 and a fourth driven gear 441 which are sequentially meshed for transmission; the fourth driving gear 641 is fixedly connected with the center of the fourth middle roller 64, and the fourth driven gear 441 is fixedly connected with the center of the fourth rear roller 44; the fifth transmission gear set comprises a fifth driving gear 651, a fifth bridge gear 55 and a fifth driven gear 451 which are sequentially meshed for transmission; the fifth driving gear 651 is fixedly connected with the center of the fifth middle roller 65, and the fifth driven gear 451 is fixedly connected with the center of the fifth rear roller 45.

The third carrier gear 53 is fixedly mounted on the first auxiliary shaft 5 in a circumferential direction; the first, second, fourth and fifth intermediate gears 51, 52, 54 and 55 are rotatably journaled on the first auxiliary shaft 5. The embodiment also comprises a second auxiliary shaft 9 and a third auxiliary shaft 10 which are respectively arranged in parallel with the first auxiliary shaft 5, and a transmission gear 94 which is meshed with the fourth carrier gear 54 for transmission is fixedly sleeved on the second auxiliary shaft 9; the third auxiliary shaft 10 is fixedly sleeved with a transmission gear 105 which is meshed with the fifth intermediate gear 55 for transmission. Thus, the feeding speeds of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving can be controlled by the rear roller shaft 4, the middle roller shaft 6, the first auxiliary shaft 5, the second auxiliary shaft 9 and the third auxiliary shaft 10, respectively.

Specifically, the rear roller and the middle row are nested rollers; the first rear roller 41 is fixedly sleeved on the rear roller shaft 4 through a key; the first back roller 41 is provided with an annular chute, and the fourth back roller 44 is rotatably sleeved on the annular chute of the first back roller 41 through a bearing. The fourth back roller 44 is also provided with an annular chute, and the third back roller 43 is rotatably sleeved on the annular chute of the fourth back roller 44 through a bearing. The second rear roller 42 is rotatably sleeved on the rear roller shaft 4 through a bearing; the second rear roller 42 is provided with an annular chute, and the fifth rear roller 45 is rotatably sleeved on the annular chute of the second rear roller 42 through a bearing.

The second middle roller 62 is fixedly sleeved on the middle roller shaft 6 through a key, an annular chute is arranged on the second middle roller 62, and the fifth middle roller 65 is rotatably sleeved on the annular chute of the second middle roller 62 through a bearing. The first middle roller 61 is rotatably sleeved on the middle roller shaft 6 through a bearing; the first middle roller 61 is provided with an annular chute, and the fourth middle roller 64 is rotatably sleeved on the annular chute of the first middle roller 61 through a bearing. The fourth middle roller 64 is also provided with an annular chute, and the third middle roller 63 is rotatably sleeved on the annular chute of the fourth middle roller 64 through a bearing.

As shown in fig. 5, the present embodiment further includes a control system and a servo drive system; the servo driving system comprises a servo driver and a servo motor; the control system comprises a controller and a rotating speed sensor; the controller is connected with the servo motor through a servo driver in sequence; the servo motor includes: a first servo motor for driving the rear roller shaft 4 to rotate, a second servo motor for driving the middle roller shaft 6 to rotate, a third servo motor for driving the first auxiliary shaft 5 to rotate, a fourth servo motor for driving the second auxiliary shaft 9 to rotate, a fifth servo motor for driving the third auxiliary shaft 10 to rotate and a front servo motor for driving the front roller 70 to rotate; the rotation speed sensor includes: a first sensor for monitoring the rotational speed of the rear roller shaft 4, a second sensor for monitoring the rotational speed of the middle roller shaft 6, a third sensor for monitoring the rotational speed of the first auxiliary shaft 5, a fourth sensor for monitoring the rotational speed of the second auxiliary shaft 9, a fifth sensor for monitoring the rotational speed of the third auxiliary shaft 10 and a front sensor for monitoring the rotational speed of the front roller 70.

The twisting mechanism also comprises a special pipe, a grid ring, a ring plate and a spindle; five strands of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving are gathered into one strand through a gathering groove of the special pipe after passing through the front roller 70, and then are twisted and wound through a ring to form the yarn. The controller controls the ring plate to rotate through the servo driver and the servo motor, and is connected with the spindle through the frequency converter and the alternating current motor; and a sixth sensor for monitoring spindle speed.

The sensor is also in many forms, and can be, for example, a photoelectric encoder or a Hall rotation speed sensor.

The linear densities of five rovings are known to be respectivelyThe linear density, blending ratio and twist of the spun yarn are required to change with time. The yarn linear density, blending ratio and twist are set as time variables, and can be respectively used 、/>And (3) representing.

1. Front roller speed

Assuming ingot speedSpinning is carried out, and the front roller speed can be obtained according to the twist degree:

(35)

spindle rotation speed during spinningIs operated according to a set rule and does not belong to the regulation and control quantity. When the twist of the yarn is changed, the front roller speed can be changed to realize the change of the twist.

2. Rear roller speed

The total draft ratio of the first pass is obtained from known conditions:

(36)

rear roller speed

(37)

3. Middle roller speed

The total draft ratio of the second channel is obtained from the known conditions:

(38)

middle roller speed

（39）

4. Speed of the first auxiliary shaft

The total draft ratio of the third channel is obtained from the known conditions:

(40)

the speed of the first auxiliary shaft

（41）

5. Second auxiliary shaft speed

The total draft ratio of the fourth channel is obtained from the known conditions:

(42)

the speed of the second auxiliary shaft is:

(43)

6. third auxiliary shaft speed

The total draft ratio of the fifth channel is obtained from the known conditions:

(44)

the third auxiliary shaft speed is:

(45)

the above analysis shows that when spun yarn、When all changes with time, the front roller speed at the corresponding moment can be obtained by the formulas (36) - (45)>Middle roller speed->Rear roller speed->First auxiliary shaft speed->Second auxiliary shaft speed- >And third auxiliary shaft speed->Thus, yarns with varying linear density, blending ratio and twist were spun as shown in the following formula.

（46）

（47）

（48）

（49）/>

（50）

（51）

(52)

In this example, the fiber types of the rovings fed by each passage are respectively: cotton roving, hemp roving, fine wool roving, spun silk roving and viscose roving, wherein the linear density of each roving is 4.5 g/10 m, the drafting ratio C=1.25 of the middle roller and the rear roller which are connected through the bridge teeth of each drafting channel, and if the spindle speed is 16000 r/min. The cotton style, the wool style, the spun silk style, the chemical fiber style and the like are required to be represented on different segments of the yarn through the proportion change, the thickness change and the twist change of raw materials.

Yarns were spun at various time periods, as shown in table 1, with varying linear density, blend ratio, and twist, as shown in table 1:

TABLE 1 geometric specification parameters of cotton, wool, hemp, silk and chemical fiber yarns

The parameters in table 1 are put into the above formula, and the spinning process parameters of spinning variable count, variable ratio and variable twist yarn in each period can be obtained, as shown in table 2.

TABLE 2 spinning process parameters of variable count, variable ratio, variable twist yarn

Yarns with varying linear density, blending ratio and twist were spun by the spinning process parameters and three-channel digital ring spinning frame in table 2. The distribution of the linear density, blending ratio and twist on the yarn by testing the spun yarn is shown in table 3. Through data analysis, various structural parameters of the spun yarn are close to set values, and various styles such as cotton style, hemp style, wool style, silk style, chemical fiber style and mixed style are realized on one yarn through the means of changing count, changing ratio and twisting, so that an effective means is provided for innovation of the fabric style.

TABLE 3 distribution of count, ratio, count of twist yarn, blend ratio and twist

Experimental statistics prove that the breakage rate of the yarn in the first drafting zone is zero, the occurrence probability of unstable points of the thickness mutation is reduced by 72% compared with the prior art, meanwhile, the breakage rate of the yarn in the second drafting zone is reduced by 43%, and the occurrence probability of unstable points of the thickness mutation is reduced by 31% compared with the prior art.

Example 2

The present embodiment is basically the same in structure as embodiment 1, except that:

as shown in fig. 6, the control system further includes a first comparing module, where the first comparing module is connected to the first sensor, the second sensor, the third sensor, the fourth sensor, the fifth sensor, and the controller, and the first comparing module is configured to monitor a rotation speed ratio between the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft, and the third auxiliary shaft, and the controller adjusts and controls the rotation speed of one or several of the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft, and the third auxiliary shaft according to a numerical value fed back by the first comparing module, so as to adjust and control a blending ratio of the first component roving, the second component roving, the third component roving, the fourth component roving, and the fifth component roving.

The control system further comprises a second comparison module which is respectively connected with the first sensor, the front sensor and the controller; the second comparison module is used for monitoring the rotation speed ratio between the rear roller shaft and the front roller, further monitoring the draft ratio of the first component roving, and the controller regulates the rotation speed of the rear roller shaft or the front roller according to the numerical value fed back by the second comparison module, further regulating the draft ratio of the first component roving. The control system further comprises a third comparison module which is respectively connected with the second sensor, the front sensor and the controller; the third comparison module is used for monitoring the rotation speed ratio between the middle roller shaft and the front roller, further monitoring the draft ratio of the second component roving, and the controller regulates the rotation speed of the middle roller shaft or the front roller according to the numerical value fed back by the third comparison module, further regulating the draft ratio of the second component roving.

The control system further comprises a fourth comparison module which is respectively connected with the third sensor, the front sensor and the controller; the fourth comparison module is used for monitoring the rotation speed ratio between the first auxiliary shaft and the front roller, further monitoring the draft ratio of the third component roving, and the controller regulates the rotation speed of the first auxiliary shaft or the front roller according to the numerical value fed back by the fourth comparison module, further regulating the draft ratio of the third component roving. The control system further comprises a fifth comparison module which is respectively connected with the fourth sensor, the front sensor and the controller; the fifth comparison module is used for monitoring the rotation speed ratio between the second auxiliary shaft and the front roller, further monitoring the draft ratio of the fourth component roving, and the controller regulates the rotation speed of the second auxiliary shaft or the front roller according to the numerical value fed back by the fifth comparison module, further regulating the draft ratio of the fourth component roving. The control system further comprises a sixth comparison module which is respectively connected with the fifth sensor, the front sensor and the controller; the sixth comparison module is used for monitoring the rotation speed ratio between the third auxiliary shaft and the front roller, further monitoring the draft ratio of the fifth component roving, and the controller regulates the rotation speed of the third auxiliary shaft or the front roller according to the numerical value fed back by the sixth comparison module, further regulating the draft ratio of the fifth component roving.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. An alternating drafting five-channel spinning device is characterized by comprising a first channel for passing a first component roving, a second channel for passing a second component roving, a third channel for passing a third component roving, a fourth channel for passing a fourth component roving and a fifth channel for passing a fifth component roving;

the first channel is sequentially provided with a first back roller, a first middle roller and a front roller, the first back roller is connected with the first middle roller through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio between the first middle roller and the first back roller constant and not more than 1.4;

the second channel is sequentially provided with a second rear roller, a second middle roller and the front roller; the second rear roller and the second middle roller are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio between the second middle roller and the second rear roller constant and not more than 1.4;

the third channel is sequentially provided with a third rear roller, a third middle roller and the front roller; the third rear roller and the third middle roller are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio between the third middle roller and the third rear roller constant and not more than 1.4;

The fourth channel is sequentially provided with a fourth rear roller, a fourth middle roller and the front roller; the fourth rear roller and the fourth middle roller are connected through a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio between the fourth middle roller and the fourth rear roller constant and not more than 1.4;

a fifth rear roller, a fifth middle roller and the front roller are sequentially arranged on the fifth channel; the fifth rear roller and the fifth middle roller are connected through a fifth transmission gear set, and the fifth transmission gear set is used for keeping the traction ratio between the fifth middle roller and the fifth rear roller constant and not more than 1.4;

2. The alternating draft five channel spinning apparatus according to claim 1, wherein an upper cover roller is provided above the middle roller in each channel, the spinning apparatus further comprising an upper cover ring which is fitted over and kept in synchronous movement with the middle roller and upper pins, and a lower cover ring which is fitted over and kept in synchronous movement with the middle roller and lower pins; the distance between the holding jaws of the upper leather collar and the lower leather collar and the jaw line of the front roller is less than 3mm.

3. The alternating draft five channel spinning apparatus of claim 1, further comprising a rear roller shaft and a middle roller shaft;

in the circumferential direction of the rear roller shaft, the first rear roller is sleeved on the rear roller shaft in a relatively fixed manner, and the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller are sleeved on the rear roller shaft in a relatively rotatable manner;

4. The alternating draft five channel spinning apparatus of claim 3, wherein the first drive gear set includes a first driving gear, a first bridge gear and a first driven gear which are sequentially engaged for transmission; the first driving gear is fixedly connected with the first rear roller in a coaxial manner, and the first driven gear is fixedly connected with the first middle roller in a coaxial manner;

5. The alternating draft five channel spinning apparatus of claim 4 further comprising a first auxiliary shaft;

6. The alternating draft five channel spinning device according to claim 5, further comprising a second auxiliary shaft and a third auxiliary shaft which are respectively arranged in parallel with the first auxiliary shaft, wherein a transmission gear which is meshed with the fourth bridge gear is fixedly sleeved on the second auxiliary shaft; and a transmission gear meshed with the fifth intermediate gear is fixedly sleeved on the third auxiliary shaft.

7. The alternating draft five channel spinning apparatus of claim 6, further comprising a control system and a servo drive system;

the servo driving system comprises a servo driver and a servo motor;

the control system comprises a controller and a rotating speed sensor;

8. The alternating draft five channel spinning apparatus of claim 1 further comprising a twist blocking roller disposed above the profile tube; the front upper leather roller is arranged above the front roller, and the twisting-resistant leather roller rotates along with the front upper leather roller in the same direction through the sixth transmission gear set.

9. The alternating draft five channel spinning device according to claim 8, wherein the transmission ratio of the sixth transmission gear set is 0.741-0.909, thereby realizing a draft ratio between the twist-retarding leather roller and the front epithelial roller of 1.1-1.35.