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CN108796673B - Carding autoleveling method and device based on opening strength - Google Patents

Carding autoleveling method and device based on opening strength Download PDF

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CN108796673B
CN108796673B CN201810371044.3A CN201810371044A CN108796673B CN 108796673 B CN108796673 B CN 108796673B CN 201810371044 A CN201810371044 A CN 201810371044A CN 108796673 B CN108796673 B CN 108796673B
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licker
opening strength
speed
carding
feed roller
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CN108796673A (en
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和杉杉
程隆棣
薛文良
张毅
姚超然
张淑慧
侯令晨
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Zhejiang Changshan Textile Co ltd
Donghua University
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Zhejiang Changshan Textile Co ltd
Donghua University
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/36—Driving or speed control arrangements

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Abstract

本发明涉及一种基于开松强度的梳棉自调匀整方法及其装置，装置包括刺辊、道夫、刺辊驱动电机、功率检测装置、模拟/数据转换器芯片、CPU运算处理器、速度调节器、给棉罗拉电机和给棉罗拉；刺辊驱动电机与刺辊连接，功率检测装置分别与刺辊驱动电机和模拟/数据转换器芯片通过导线连接，CPU运算处理器分别与模拟/数据转换器芯片和速度调节器通过导线连接，速度调节器、给棉罗拉电机和给棉罗拉顺序连接，利用该装置的方法通过开松强度的波动反馈调整相应给棉量，使开松强度保持相对恒定，实现输出纤维均匀度的优化。本发明装置结构简单，利用该装置的方法克服了传统开闭环和混合环自调匀整方法的缺陷，实现了纤维均匀度的优化。

Figure 201810371044

The invention relates to an autoleveling method and device for carding based on opening strength. The device includes a licker-in, a doffer, a licker-in drive motor, a power detection device, an analog/data converter chip, a CPU arithmetic processor, and a speed regulator. The licker-in drive motor is connected with the licker-in, the power detection device is connected with the licker-in drive motor and the analog/data converter chip through wires, and the CPU arithmetic processor is connected with the analog/data converter respectively. The controller chip and the speed regulator are connected by wires, and the speed regulator, the feeding roller motor and the feeding roller are connected in sequence. The method of this device is used to adjust the corresponding feeding amount through the fluctuation feedback of the opening strength, so that the opening strength remains relatively constant. , to achieve the optimization of output fiber uniformity. The device of the invention has a simple structure, and the method of the device overcomes the defects of the traditional open-closed-loop and mixed-loop autoleveling methods, and realizes the optimization of the fiber uniformity.

Figure 201810371044

Description

Cotton carding self-adjusting and leveling method and device based on opening strength
Technical Field
The invention belongs to the field of spinning, and relates to a cotton carding self-leveling method and a cotton carding self-leveling device based on opening strength.
Background
In the traditional carding machine, fibers are fed by a feeding device and repeatedly carded by a carding piece to form a sliver, wherein in the carding process, the thickness of the section of the fibers in a channel of the carding machine is uneven, the unevenness comprises various forms, the waveform is complex and uneven carding in the carding process can be caused, so that the carding quality of a product is unstable, in addition, if the unevenness of the fibers is not controlled, the quantitative fluctuation of the sliver can be caused, and the burden of each subsequent process can be further caused, finally, the unevenness can be generated in the finished yarn, and the uneven initial length can be amplified along with the drafting multiple of each process, so that the strength of the finally generated yarn is low, the breakage rate is high, the uniformity is poor, and the quality is reduced.
The common carding self-leveling method mainly comprises open loop, closed loop and mixing loop self-leveling, and mainly comprises the following steps:
1) opening the ring: as shown in figure 1, the linear density of the sliver or cotton layer is detected, then the feeding speed is controlled, and the linear density of the output sliver is adjusted, so that the method has strong pertinence, has excellent effect on short segment unevenness, but cannot compensate for unevenness in the drafting process;
2) closed loop: as shown in fig. 2, the detection is performed after the leveling, but the uneven wave with the wavelength equal to or less than the distance from the leveling point to the detection point cannot be leveled;
3) mixing ring: open loop and closed loop are considered.
The three modes have the same point that the detection points are basically the same by detecting the thickness of the cotton layer as a processing signal, the detection points comprise a position between a cotton feeding roller and a cotton feeding plate or a concave-convex detection roller, the leveling points are basically the same and comprise the speed of the cotton feeding roller or a front roller or the speed of an output roller or a coiler, however, in the leveling mode, the open-loop leveling can only be adjusted according to random unevenness, and uneven waves in a certain range are eliminated, namely, the unevenness of short sections can be adjusted; the closed-loop evenness can only even uneven waves with the wavelength less than or equal to the distance between two points, so that an evenness dead zone exists and the long-segment unevenness is mainly adjusted; in the mixing ring is even, the defects of the two modes can be overcome by combining an open loop and a closed loop, but the device is complex and the manufacturing cost is high.
Therefore, the research on a carding self-leveling method and a device thereof, which are simple and convenient to install, do not need or rarely change the structure of a carding machine and can overcome the limitation on the length of leveling segments in an open-loop or closed-loop leveling mode, is a problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the limitation of cotton carding self-leveling method on adjusting unevenness of long and short segments and the problem of complex structure of a mixed type self-leveling device in the prior art, and provides a cotton carding self-leveling method and a cotton carding self-leveling device based on opening strength, which are simple and convenient to install and can adjust unevenness of the long and short segments.
In order to achieve the purpose, the invention adopts the technical scheme that:
the cotton carding self-adjusting and leveling method based on the opening strength adjusts the corresponding cotton feeding amount through the fluctuation feedback of the opening strength, so that the opening strength is kept relatively constant, and the optimization of the uniformity of output fibers is realized;
the corresponding cotton feeding amount is adjusted through the fluctuation feedback of the opening strength, namely the change amount of the speed of the cotton feeding roller is obtained through the fluctuation feedback of the opening strength, and then the corresponding cotton feeding amount is adjusted through the feedback of the change amount of the speed of the cotton feeding roller;
the fluctuation of the opening strength refers to the variation of the opening strength;
the calculation formula of the change amount of the speed of the feed roller is as follows:
Figure BDA0001638455020000021
in the formula,. DELTA.VtIs the variation of the speed of the cotton feeding roller in r/min, and the variation of the opening strength in Delta F in N, p in the initial parameter, within +/-0.2N, G in the grade of the fed material, and k in the correlation coefficient in min2·N/(r2Mm), L is the fiber length in mm, VdThe output speed of the doffer is expressed in r/min.
In the licker-in opening process, the surface transfers impulse to the cotton layer and overcomes the friction force between fibers to generate strong interaction force. When the cotton roll is fed into a carding machine, the fluctuation of the fiber quantity in unit time can influence the interaction force between the fibers overcome by the saw teeth due to fiber opening and the mutual friction force between the saw teeth and the fibers; and the fiber quantity stripped and driven by the licker-in is also changed, the resistance on the rotation of the licker-in is changed, and the corresponding power is also correspondingly fluctuated. When the content of the fibers or fiber bundles in the cotton layer is increased (reduced), the motor for driving the licker-in to rotate needs to provide more (less) impulse and overcome more (less) friction force, so that when the cotton rolls of the same batch are fed, the opening strength of the licker-in is detected to reflect the fiber amount fed into the carding machine, so that the feeding speed is adjusted, and the fiber output speed of the output part of the carding machine is ensured. At this time, the amount of the fibers opened at the licker-in tends to be consistent through the adjusting function of the method of the invention, when the amount of the fibers is basically unchanged, the number of the fibers opened at the licker-in is not changed in unit time, therefore, the opening degree of the fibers is basically consistent, the change of the output fibers in the nep content, the impurity content and the short fiber content along with the time can be kept relatively constant, and the relative stability of the output fibers in the weight and the quality is realized.
As a preferred technical scheme:
the carding self-leveling method based on the opening strength is characterized in that the fluctuation of the opening strength refers to the fluctuation of the opening strength above and below a reference value, the reference value is the average value of the opening strength in a normal load state within a period of time, and the opening strength refers to the acting force applied when the fibers are opened at the licker-in, namely the force applied when large fiber masses or fiber blocks which are transversely connected are broken into small blocks, small bundles or even single fibers when the fibers are opened at the licker-in of the carding machine.
In the carding self-leveling method based on opening strength, the adjusting of the corresponding cotton feeding amount through the feedback of the change amount of the speed of the cotton feeding roller means adjusting the corresponding speed of the cotton feeding roller through the feedback of the change amount of the speed of the cotton feeding roller, and the method specifically comprises the following steps:
when the opening strength fluctuates, the cotton feeding speed must be adjusted to make the opening strength constant, for example, when the opening strength is increased, which indicates that the amount of opened fibers in unit time is increased, the cotton feeding speed should be reduced, so that the amount of fibers in the opening interval gradually falls back;
considering that the opening process is stable, adjusting the corresponding cotton feeding speed as follows:
Vt'＝(Vt-ΔVt)；
Figure BDA0001638455020000031
in the formula, Vt"is the corresponding feed roller speed, V is the feed roller speed before adjustment, Vt' theoretical real-time feed roller speed, VtFor actual real-time feed roller speed, Δ VtThe unit of the corresponding cotton feeding roller speed, the cotton feeding roller speed before adjustment, the theoretical real-time cotton feeding roller speed and the actual real-time cotton feeding roller speed is r/min; m and n are positive integers within 1-10, m and n are parameters for controlling the speed of the feeding roller to adjust the speed, the values of m and n are related to the grade value of the fed raw material, the smaller the grade value G of the fed raw material is (the smaller the grade value is, the higher the grade is), the smaller m/n is:
Figure BDA0001638455020000032
in the formula, k1The value range of the relevant parameters is 0.5-2.
The cotton carding self-leveling method based on opening strength is characterized in that a cotton roll passes through a cotton feeding roller and then is fed into a licker-in through a cotton feeding plate, the licker-in rotating at a high speed peels off fibers on the cotton feeding plate through a metal saw blade coated on the surface of the licker-in, and 70-80% of fiber bundles are opened into smaller fiber bundles or single fibers. For the carding machine, in the idle driving state, the saw blades on the surface of each part are only under the action of air resistance, after the fibers are fed, the rotating part needs to overcome the air resistance, and also receives the interaction force between the fibers overcome by the fiber opening, so that the fibers are peeled from the very low-speed cotton feeding plate and are changed into the high-speed movement state along with the fiber opening, and the power of the parts is different from that in the idle driving state. When the lap of the same batch is fed, the fluctuation of the fiber quantity fed into the carding machine can be reflected by detecting the power change of the licker-in driving motor, so as to adjust the feeding speed and ensure the fiber output speed of the output part of the carding machine, therefore, the fluctuation of the opening strength is obtained by continuously detecting the power fluctuation of the licker-in, and the process is concretely as follows:
the relationship between the power and the opening strength satisfies:
F＝(N－N0)×999.6/VL；
wherein F is the real-time opening strength in the unit of N, N is the real-time licker-in load power in the unit of kW, N0Is the idle power of the licker-in kW, VLThe linear speed of the surface of the licker-in is in m/s;
then, according to the above relationship, the corresponding relationship between the variation of the opening strength and the variation of the licker-in power is:
ΔF＝999.6×ΔN/VL；
Figure BDA0001638455020000041
in the formula, delta N is the variation of the licker-in load power in kW, and N is the real-time licker-in load power in kW and VLIs the linear speed of the surface of the licker-in, and the unit is m/s,
Figure BDA0001638455020000042
the average value of the licker-in load power of the carding machine in a period of time under a normal load state is shown in kW.
The cotton carding self-leveling method based on the opening strength keeps the opening strength relatively constant, namely the fluctuation range of the opening strength is controlled within +/-5%.
The invention also provides a carding autolevelling device of the carding autolevelling method based on the opening strength, which comprises a licker-in, a doffer, a licker-in driving motor, a power detection device, an analog/data converter chip, a CPU arithmetic processor, a speed regulator, a cotton feeding roller motor and a cotton feeding roller;
the licker-in driving motor is connected with the licker-in, the power detection device is respectively connected with the licker-in driving motor and the analog/data converter chip through wires, the CPU arithmetic processor is respectively connected with the analog/data converter chip and the speed regulator through wires, the speed regulator, the cotton feeding roller motor and the cotton feeding roller are sequentially connected, namely the speed regulator is connected with the cotton feeding roller motor, and the cotton feeding roller motor is connected with the cotton feeding roller.
As a preferred technical scheme:
according to the cotton carding autoleveller based on opening strength, the power detection device is a power detection standard instrument or a digital power meter, and the speed regulator is a frequency converter.
The cotton carding autoleveller based on the opening strength further comprises a cylinder, a horn mouth and a coiler, and the CPU operation processor is further connected with the display screen and the keyboard through leads respectively.
The concrete process of adjusting the corresponding cotton feeding amount through the fluctuation feedback of the opening strength is as follows:
before starting, starting to measure the no-load power of the licker-in driving motor in an empty state, and in addition, inputting the average value of the licker-in load power for a period of time in a normal cotton feeding state by an operator;
after the cotton carding machine is started, the power detection device collects the real-time power of a licker-in driving motor, namely the real-time licker-in load power and converts the real-time power into a voltage signal to be transmitted to an analog/data converter chip, the analog/data converter chip conditions and converts the voltage signal into collected data which can be read by a CPU (central processing unit) operation processor, the CPU operation processor reads the data and calculates the data to obtain real-time opening strength and displays the real-time opening strength on a display screen, meanwhile, the real-time licker-in load power is compared with the average value of the licker-in load power and calculates the variation of the opening strength, then the variation of the cotton feeding speed is calculated according to the variation of the obtained opening strength to obtain a cotton feeding speed signal which needs to be correspondingly adjusted and transmits the cotton feeding speed signal to a speed adjuster, the speed adjuster adjusts the cotton feeding speed of a cotton feeding roller according to the, so that the opening strength is kept relatively constant, and the uniformity of output fibers is optimized.
Has the advantages that:
(1) the cotton carding self-leveling device based on the opening strength has no specific measuring point, measures and converts the actual power of the licker-in driving motor, and has simple structure and simple and convenient installation;
(2) compared with the traditional characterization method by using the thickness of the fiber aggregate, the cotton carding self-leveling method based on the opening strength has the advantages that the detection point is the stress strength of the fiber entering the opening interval for the first time, the uniformity in the cotton carding machine can be more directly reflected, meanwhile, the detection point data is obtained in real time through a motor signal, the reaction is rapid, and the error is small;
(3) the cotton carding self-leveling method based on opening strength overcomes the limitation of the traditional open-closed loop self-leveling device on the length of the leveling segments, overcomes the defect of complexity of the mixing loop self-leveling device, and has excellent popularization value;
(4) the opening strength is represented by measuring the power of the licker-in driving motor, and the detection data is used for detecting the opening strength of all fibers entering the carding machine in unit time, so that the opening strength self-leveling method has more representative response to the operation condition of the carding machine.
Drawings
FIG. 1 is a schematic flow diagram of a prior art open-loop method of cotton carding autolevelling;
FIG. 2 is a schematic flow diagram of a closed loop method for cotton carding autolevelling in the prior art;
FIG. 3 is a schematic flow chart of the opening strength-based cotton carding self-leveling method.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
The cotton carding self-leveling device based on the cotton carding self-leveling method of the opening strength comprises a licker-in, a doffer, a licker-in driving motor, a power detection device, an analog/data converter chip, a CPU arithmetic processor, a speed regulator, a cotton feeding roller motor and a cotton feeding roller;
the licker-in driving motor is connected with the licker-in, the power detection device is connected with the licker-in driving motor and the analog/data converter chip through wires, the CPU arithmetic processor is connected with the analog/data converter chip and the frequency converter through wires, the frequency converter is connected with the cotton feeding roller motor, and the cotton feeding roller motor is connected with the cotton feeding roller, wherein the power detection device is a power detection standard instrument;
the cotton carding autoleveller also comprises a cylinder, a bell mouth and a coiler; the CPU arithmetic processor is also respectively connected with the display screen and the keyboard through wires.
The cotton carding self-leveling method using the device is as shown in figure 3, and concretely comprises the following steps:
(1) before starting, the operator inputs the average value of the licker-in load power of the carding machine in a period of time under the normal load state through a keyboard
Figure BDA0001638455020000061
Simultaneously, the method is used for measuring the no-load power N of the licker-in when driving in an empty state0Wherein
Figure BDA0001638455020000062
Is 0.6kW, N0Is 0.376 kW;
(2) the fiber is fed by a cotton feeding roller, is opened by a licker-in, is combed by a cylinder, is condensed at a doffer, is formed at a bell mouth and is combed by a coiler, and the carding process is specifically finished by the process of adjusting the corresponding cotton feeding amount through the fluctuation feedback of the opening strength during carding:
(2.1) the power detection standard instrument collects the real-time power of the licker-in driving motor, namely the real-time licker-in load power, and converts the real-time power into a voltage signal to be transmitted to an analog/data converter chip, and the analog/data converter chip conditions and converts the voltage signal into collected data which can be read by a CPU (central processing unit) operation processor;
(2.2) reading data by the CPU arithmetic processor, calculating the data to obtain real-time opening strength and displaying the real-time opening strength on a display screen, wherein the calculation formula of the real-time opening strength F is as follows:
F＝(N－N0)×999.6/VL；
wherein F is the real-time opening strength in the unit of N, N is the real-time licker-in load power in the unit of kW, N0Is the idle power of the licker-in kW, VLIs the linear speed of the licker-in surface, and the unit is m/s, wherein, VL13.92m/s, N is 0.593-0.612kW, and the real-time power is changed all the time, and the opening strength is kept relatively constant by detecting the fluctuation of the real-time power of the licker-in;
meanwhile, the real-time licker-in load power is compared with the average value of the licker-in load power and the change quantity of the opening strength is obtained through calculation, and the calculation formula of the change quantity of the opening strength is as follows:
ΔF＝999.6×ΔN/VL；
Figure BDA0001638455020000071
in the formula, delta N is the variation of the licker-in load power in kW, and N is the real-time licker-in load power in kW and VLIs the linear speed of the surface of the licker-in, and the unit is m/s,
Figure BDA0001638455020000072
is the average value of the licker-in load power of the carding machine in normal load state for a period of timeIs kW;
(2.3) the CPU operation processor calculates the variation of the cotton feeding speed according to the variation of the opening strength;
the calculation formula of the change amount of the speed of the feed roller is as follows:
Figure BDA0001638455020000073
in the formula, delta F is the variation of opening strength, the unit is N, p is an initial parameter, p is a parameter introduced for reducing the influence of factors such as null shift, G is the grade value of the fed raw material, k is the correlation coefficient between the speed variable of the cotton feeding roller and the opening strength variable, the value of k is related to the fiber performance and the linear density of the slivers, the more excellent the fiber performance is, the larger the linear density of the slivers is, the larger the value of k is, the unit is min2·N/(r2Mm), L is the fiber length in mm, VdIs the output speed of doffer, and has the unit of r/min, wherein p is 0.01N, G is 3, and k is 0.0024min2·N/(r2Mm), L is 30mm, VdIs 40 r/min;
(2.4)) the CPU operation processor obtains the corresponding speed of the feeding roller through the feedback of the change amount of the speed of the feeding roller and transmits the obtained corresponding speed signal of the feeding roller to the frequency converter, and the calculation formula of the corresponding speed of the feeding roller is as follows:
Figure BDA0001638455020000081
Vt'＝(Vt-ΔVt)；
in the formula, Vt"is the corresponding feed roller speed, V is the feed roller speed before adjustment, Vt' theoretical real-time feed roller speed, VtFor actual real-time feed roller speed, Δ VtThe unit of the change of the speed of the corresponding cotton feeding roller, the speed of the cotton feeding roller before adjustment, the theoretical real-time speed of the cotton feeding roller, the actual real-time speed of the cotton feeding roller and the change of the speed of the cotton feeding roller is r/min;
wherein m is 3, n is 7, V is 50.23-55.17r/min, VtIs 50.23-55.17 r/min;
(2.5) transmitting a corresponding cotton feeding roller speed signal to a cotton feeding roller motor by a frequency converter, and controlling the cotton feeding roller to feed cotton according to the corresponding cotton feeding roller speed by the cotton feeding roller motor;
(3) finally, counting the opening intensity values at all times, wherein the opening intensity value range is [15.31-16.88] N, and the opening intensity value is required to be within +/-5% of the reference value of 16.08N, so that the optimization of the uniformity of output fibers is realized.
Compared with the traditional characterization method by using the thickness of the fiber aggregate, the cotton carding self-leveling method and the cotton carding self-leveling device have the advantages that the uniformity of the fiber aggregate is characterized by the opening strength, the detection point is the stress strength of the fiber entering the opening interval for the first time, the uniformity in the cotton carding machine can be directly reflected, meanwhile, the detection point data is obtained in real time through a motor signal, the reaction is rapid, and the error is small.
Example 2
The cotton carding autolevelling device of the cotton carding autolevelling method based on opening strength has the same structure and the same adjusting method as the embodiment 1, and is different in that the power detection device is a digital power meter.
Compared with the traditional characterization method by using the thickness of the fiber aggregate, the cotton carding self-leveling method and the cotton carding self-leveling device have the advantages that the uniformity of the fiber aggregate is characterized by the opening strength, the detection point is the stress strength of the fiber entering the opening interval for the first time, the uniformity in the cotton carding machine can be directly reflected, meanwhile, the detection point data is obtained in real time through a motor signal, the reaction is rapid, and the error is small.
Example 3
The cotton carding self-leveling device based on the cotton carding self-leveling method of the opening strength comprises a licker-in, a doffer, a licker-in driving motor, a power detection device, an analog/data converter chip, a CPU arithmetic processor, a speed regulator, a cotton feeding roller motor and a cotton feeding roller;
the licker-in driving motor is connected with the licker-in, the power detection device is connected with the licker-in driving motor and the analog/data converter chip through wires, the CPU arithmetic processor is connected with the analog/data converter chip and the frequency converter through wires, the frequency converter is connected with the cotton feeding roller motor, and the cotton feeding roller motor is connected with the cotton feeding roller, wherein the power detection device is a power detection standard instrument;
the cotton carding autoleveller also comprises a cylinder, a bell mouth and a coiler; the CPU arithmetic processor is also respectively connected with the display screen and the keyboard through wires.
The cotton carding self-leveling method using the device comprises the following specific steps:
(1) before starting, the operator inputs the average value of the licker-in load power of the carding machine in a period of time under the normal load state through a keyboard
Figure BDA0001638455020000091
Simultaneously, the method is used for measuring the no-load power N of the licker-in when driving in an empty state0Wherein
Figure BDA0001638455020000092
Is 1kW, N00.62 kW;
(2) the fiber is fed by a cotton feeding roller, is opened by a licker-in, is combed by a cylinder, is condensed at a doffer, is formed at a bell mouth and is combed by a coiler, and the carding process is specifically finished by the process of adjusting the corresponding cotton feeding amount through the fluctuation feedback of the opening strength during carding:
(2.1) the power detection standard instrument collects the real-time power of the licker-in driving motor, namely the real-time licker-in load power, and converts the real-time power into a voltage signal to be transmitted to an analog/data converter chip, and the analog/data converter chip conditions and converts the voltage signal into collected data which can be read by a CPU (central processing unit) operation processor;
(2.2) reading data by the CPU arithmetic processor, calculating the data to obtain real-time opening strength and displaying the real-time opening strength on a display screen, wherein the calculation formula of the real-time opening strength F is as follows:
F＝(N－N0)×999.6/VL；
wherein F is the real-time opening strength in the unit of N, N is the real-time licker-in load power in the unit of kW, N0Is the idle power of the licker-in kW, VLIs the linear speed of the licker-in surface, and has the unit of m/s, wherein VL14.18m/s, and 0.36-0.40kW of N;
meanwhile, the real-time licker-in load power is compared with the average value of the licker-in load power and the change quantity of the opening strength is obtained through calculation, and the calculation formula of the change quantity of the opening strength is as follows:
ΔF＝999.6×ΔN/VL；
Figure BDA0001638455020000101
in the formula, delta N is the variation of the licker-in load power in kW, and N is the real-time licker-in load power in kW and VLIs the linear speed of the surface of the licker-in, and the unit is m/s,
Figure BDA0001638455020000102
the average value of the licker-in load power of the carding machine in a period of time under a normal load state is kW;
(2.3) the CPU operation processor calculates the variation of the cotton feeding speed according to the variation of the opening strength;
the calculation formula of the change amount of the speed of the feed roller is as follows:
Figure BDA0001638455020000103
wherein, the delta F is the variation of the opening strength, the unit is N, p is an initial parameter, p is a parameter introduced for reducing the influence of factors such as null shift, G is the grade value of the fed raw material, k is the correlation coefficient between the speed variable of the cotton feeding roller and the opening strength variable, and the value of k is the fiber performance and the sliverThe linear density is related, the better the fiber performance is, the larger the linear density of the raw sliver is, the larger the k value is, and the unit is min2·N/(r2Mm), L is the fiber length in mm, VdIs the output speed of doffer, and has the unit of r/min, wherein p is 0.02N, G is 3, and k is 0.003min2·N/(r2Mm), L is 32mm, VdIs 44 r/min;
(2.4)) the CPU operation processor obtains the corresponding speed of the feeding roller through the feedback of the change amount of the speed of the feeding roller and transmits the obtained corresponding speed signal of the feeding roller to the frequency converter, and the calculation formula of the corresponding speed of the feeding roller is as follows:
Figure BDA0001638455020000104
Vt'＝(Vt-ΔVt)；
in the formula, Vt"is the corresponding feed roller speed, V is the feed roller speed before adjustment, Vt' theoretical real-time feed roller speed, VtFor actual real-time feed roller speed, Δ VtThe unit of the change of the speed of the corresponding cotton feeding roller, the speed of the cotton feeding roller before adjustment, the theoretical real-time speed of the cotton feeding roller, the actual real-time speed of the cotton feeding roller and the change of the speed of the cotton feeding roller is r/min;
wherein m is 3, n is 7, V is 54.49-58.87r/min, VtIs 54.49 to 58.87 r/min;
(2.5) transmitting a corresponding cotton feeding roller speed signal to a cotton feeding roller motor by a frequency converter, and controlling the cotton feeding roller to feed cotton according to the corresponding cotton feeding roller speed by the cotton feeding roller motor;
(3) finally, counting the opening intensity values at all times, wherein the opening intensity value range is [25.50-28.14] N and is within +/-5% of the opening intensity value 26.8N, and optimizing the uniformity of output fibers.
Example 4
The cotton carding self-leveling device based on the cotton carding self-leveling method of the opening strength comprises a licker-in, a doffer, a licker-in driving motor, a power detection device, an analog/data converter chip, a CPU arithmetic processor, a speed regulator, a cotton feeding roller motor and a cotton feeding roller;
the licker-in driving motor is connected with the licker-in, the power detection device is connected with the licker-in driving motor and the analog/data converter chip through wires, the CPU arithmetic processor is connected with the analog/data converter chip and the frequency converter through wires, the frequency converter is connected with the cotton feeding roller motor, and the cotton feeding roller motor is connected with the cotton feeding roller, wherein the power detection device is a power detection standard instrument;
the cotton carding autoleveller also comprises a cylinder, a bell mouth and a coiler; the CPU arithmetic processor is also respectively connected with the display screen and the keyboard through wires.
The cotton carding self-leveling method using the device comprises the following specific steps:
(1) before starting, the operator inputs the average value of the licker-in load power of the carding machine in a period of time under the normal load state through a keyboard
Figure BDA0001638455020000111
Simultaneously, the method is used for measuring the no-load power N of the licker-in when driving in an empty state0Wherein
Figure BDA0001638455020000112
Is 0.7kW, N0Is 0.434 kW;
(2) the fiber is fed by a cotton feeding roller, is opened by a licker-in, is combed by a cylinder, is condensed at a doffer, is formed at a bell mouth and is combed by a coiler, and the carding process is specifically finished by the process of adjusting the corresponding cotton feeding amount through the fluctuation feedback of the opening strength during carding:
(2.1) the power detection standard instrument collects the real-time power of the licker-in driving motor, namely the real-time licker-in load power, and converts the real-time power into a voltage signal to be transmitted to an analog/data converter chip, and the analog/data converter chip conditions and converts the voltage signal into collected data which can be read by a CPU (central processing unit) operation processor;
(2.2) reading data by the CPU arithmetic processor, calculating the data to obtain real-time opening strength and displaying the real-time opening strength on a display screen, wherein the calculation formula of the real-time opening strength F is as follows:
F＝(N－N0)×999.6/VL；
wherein F is the real-time opening strength in the unit of N, N is the real-time licker-in load power in the unit of kW, N0Is the idle power of the licker-in kW, VLIs the linear speed of the licker-in surface, and has the unit of m/s, wherein VL14.17m/s, and N is 0.684-0.714 kW;
meanwhile, the real-time licker-in load power is compared with the average value of the licker-in load power and the change quantity of the opening strength is obtained through calculation, and the calculation formula of the change quantity of the opening strength is as follows:
ΔF＝999.6×ΔN/VL；
Figure BDA0001638455020000121
in the formula, delta N is the variation of the licker-in load power in kW, and N is the real-time licker-in load power in kW and VLIs the linear speed of the surface of the licker-in, and the unit is m/s,
Figure BDA0001638455020000122
the average value of the licker-in load power of the carding machine in a period of time under a normal load state is kW;
(2.3) the CPU operation processor calculates the variation of the cotton feeding speed according to the variation of the opening strength;
the calculation formula of the change amount of the speed of the feed roller is as follows:
Figure BDA0001638455020000123
in the formula, delta F is the variation of opening strength, the unit is N, p is an initial parameter, p is a parameter introduced for reducing the influence of factors such as null shift, G is the grade value of the fed raw material, k is the correlation coefficient between the speed variable of the cotton feeding roller and the opening strength variable, the value of k is related to the fiber performance and the linear density of the slivers, the more excellent the fiber performance is, the larger the linear density of the slivers is, the more k is takenThe larger the value, the unit is min2·N/(r2Mm), L is the fiber length in mm, VdIs the output speed of doffer, and has the unit of r/min, wherein p is 0.03N, G is 4, and k is 0.003min2·N/(r2Mm), L is 30mm, VdIs 45 r/min;
(2.4)) the CPU operation processor obtains the corresponding speed of the feeding roller through the feedback of the change amount of the speed of the feeding roller and transmits the obtained corresponding speed signal of the feeding roller to the frequency converter, and the calculation formula of the corresponding speed of the feeding roller is as follows:
Figure BDA0001638455020000124
Vt'＝(Vt-ΔVt)；
in the formula, Vt"is the corresponding feed roller speed, V is the feed roller speed before adjustment, Vt' theoretical real-time feed roller speed, VtFor actual real-time feed roller speed, Δ VtThe unit of the change of the speed of the corresponding cotton feeding roller, the speed of the cotton feeding roller before adjustment, the theoretical real-time speed of the cotton feeding roller, the actual real-time speed of the cotton feeding roller and the change of the speed of the cotton feeding roller is r/min;
wherein m is 5, n is 5, V is 69.73-78.33r/min, Vt69.73-78.33 r/min;
(2.5) transmitting a corresponding cotton feeding roller speed signal to a cotton feeding roller motor by a frequency converter, and controlling the cotton feeding roller to feed cotton according to the corresponding cotton feeding roller speed by the cotton feeding roller motor;
(3) finally, counting the opening intensity values at all times, wherein the opening intensity value range is [17.87-19.70] N, and the opening intensity value is required to be within +/-5% of 18.76N, so that the optimization of the uniformity of output fibers is realized.

Claims (8)

1.基于开松强度的梳棉自调匀整方法，其特征是：通过开松强度的波动反馈调整相应给棉量，使开松强度保持相对恒定，实现输出纤维均匀度的优化；1. The carding autoleveling method based on the opening strength is characterized in that: the corresponding cotton feeding amount is adjusted by the fluctuation feedback of the opening strength, so that the opening strength is kept relatively constant, and the optimization of the output fiber uniformity is realized; 所述通过开松强度的波动反馈调整相应给棉量是指先通过开松强度的波动反馈得到给棉罗拉速度的改变量，然后通过给棉罗拉速度的改变量的反馈调整相应给棉量；The adjustment of the corresponding cotton feeding amount through the fluctuation feedback of the opening strength means that the change amount of the feeding roller speed is obtained through the fluctuation feedback of the opening strength, and then the corresponding cotton feeding amount is adjusted through the feedback of the change amount of the feeding roller speed; 所述开松强度的波动是指开松强度的改变量；The fluctuation of the opening strength refers to the amount of change in the opening strength; 所述给棉罗拉速度的改变量的计算公式如下所示：The calculation formula of the change amount of the feed roller speed is as follows:
Figure FDA0002543342850000011
Figure FDA0002543342850000011
 式中，ΔVt为给棉罗拉速度的改变量，单位为r/min，ΔF为开松强度的改变量，单位为N，p为初始参数，取值范围为±0.2N，G为喂入原料的品级值，k为相关系数，单位为min2·N/r2/mm，L为纤维长度，单位为mm，Vd为道夫的输出速度，单位为r/min。In the formula, ΔV t is the change of the feed roller speed, the unit is r/min, ΔF is the change of the opening strength, the unit is N, p is the initial parameter, the value range is ±0.2N, G is the feeding The grade value of the raw material, k is the correlation coefficient, the unit is min 2 ·N/r 2 /mm, L is the fiber length, the unit is mm, and V d is the output speed of the doffer, the unit is r/min. 2.根据权利要求1所述的基于开松强度的梳棉自调匀整方法，其特征在于，所述开松强度的波动是指开松强度在基准值上下的波动，所述基准值为正常负载状态下一段时间内的开松强度平均值，所述开松强度是指纤维在刺辊处开松时受到的作用力。2. The carding autoleveling method based on opening strength according to claim 1, wherein the fluctuation of the opening strength refers to the fluctuation of the opening strength above and below a reference value, and the reference value is normal. The average opening strength over a period of time under load, the opening strength being the force with which the fibers are opened at the licker-in. 3.根据权利要求2所述的基于开松强度的梳棉自调匀整方法，其特征在于，所述通过给棉罗拉速度的改变量的反馈调整相应给棉量是指通过给棉罗拉速度的改变量的反馈调整相应给棉罗拉速度，具体如下：3. the carding autoleveling method based on opening strength according to claim 2, is characterized in that, described by the feedback adjustment of the change amount of the feed roller speed to adjust the corresponding cotton feed amount refers to by the feed roller speed. The feedback of the change amount adjusts the corresponding feed roller speed, as follows: Vt'＝(Vt-ΔVt)；V t '=(V t -ΔV t );
Figure FDA0002543342850000012
Figure FDA0002543342850000012
 式中，Vt"为相应给棉罗拉速度，V为调整前的给棉罗拉速度，Vt'为理论实时给棉罗拉速度，Vt为实际实时给棉罗拉速度，相应给棉罗拉速度、调整前的给棉罗拉速度、理论实时给棉罗拉速度和实际实时给棉罗拉速度的单位均为r/min；m和n为1～10内的正整数。In the formula, V t " is the speed of the corresponding feed roller, V is the speed of the feed roller before adjustment, V t ' is the theoretical real-time feed roller speed, V t is the actual real-time feed roller speed, and the corresponding feed roller speed, The units of feed roller speed before adjustment, theoretical real-time feed roller speed and actual real-time feed roller speed are all r/min; m and n are positive integers within 1-10. 4.根据权利要求3所述的基于开松强度的梳棉自调匀整方法，其特征在于，所述开松强度的波动通过连续检测刺辊的功率波动获得，其过程具体如下：4. the carding autoleveling method based on opening strength according to claim 3, is characterized in that, the fluctuation of described opening strength is obtained by continuously detecting the power fluctuation of licker-in, and its process is as follows: ΔF＝999.6×ΔN/VL；ΔF=999.6×ΔN/ VL ;
Figure FDA0002543342850000021
Figure FDA0002543342850000021
 式中，ΔN为刺辊负荷功率的改变量，单位为kW，N为实时刺辊负荷功率，单位为kW，VL为刺辊表面线速度，单位为m/s，
Figure FDA0002543342850000022
为梳棉机在正常负荷状态下一段时间的刺辊负荷功率的平均值，单位为kW。In the formula, ΔN is the change of the licker-in load power, the unit is kW, N is the real-time licker-in load power, the unit is kW, VL is the surface linear velocity of the licker-in, the unit is m/s,
Figure FDA0002543342850000022
It is the average value of the licker-in load power of the carding machine for a period of time under the normal load state, and the unit is kW. 5.根据权利要求1所述的基于开松强度的梳棉自调匀整方法，其特征在于，使开松强度保持相对恒定是指开松强度的波动范围控制在±5％以内。5 . The carding autolevelling method based on opening strength according to claim 1 , wherein keeping the opening strength relatively constant means that the fluctuation range of the opening strength is controlled within ±5%. 6 . 6.采用如权利要求1～5中任一项所述的基于开松强度的梳棉自调匀整方法的梳棉自调匀整装置，其特征是：包括刺辊、道夫、刺辊驱动电机、功率检测装置、模拟/数据转换器芯片、CPU运算处理器、速度调节器、给棉罗拉电机和给棉罗拉；6. The carding autoleveling device using the opening strength-based carding autoleveling method according to any one of claims 1 to 5, characterized in that it comprises a licker-in, a doffer, a licker-in drive motor, Power detection device, analog/data converter chip, CPU arithmetic processor, speed regulator, feeding roller motor and feeding roller; 所述刺辊驱动电机与刺辊连接，所述功率检测装置分别与刺辊驱动电机和模拟/数据转换器芯片通过导线连接，CPU运算处理器分别与模拟/数据转换器芯片和速度调节器通过导线连接，所述速度调节器、给棉罗拉电机和给棉罗拉顺序连接。The licker-in drive motor is connected with the licker-in, the power detection device is connected with the licker-in drive motor and the analog/data converter chip through wires respectively, and the CPU arithmetic processor is connected with the analog/data converter chip and the speed regulator respectively. The wires are connected, and the speed regulator, the feed roller motor and the feed roller are connected in sequence. 7.根据权利要求6所述的基于开松强度的梳棉自调匀整方法的梳棉自调匀整装置，其特征在于，所述功率检测装置为功率检测标准仪或数字功率计，所述速度调节器为变频器。7. The carding autoleveling device of the carding autoleveling method based on opening strength according to claim 6, wherein the power detection device is a power detection standard instrument or a digital power meter, and the speed The regulator is a frequency converter. 8.根据权利要求6所述的基于开松强度的梳棉自调匀整方法的梳棉自调匀整装置，其特征在于，所述梳棉自调匀整装置还包括锡林、喇叭口和圈条器，所述CPU运算处理器还分别与显示屏和键盘通过导线连接。8. the carding autoleveling device of the carding autoleveling method based on opening strength according to claim 6, is characterized in that, described carding autolevelling device also comprises cylinder, bell mouth and coiled strip The CPU arithmetic processor is also connected with the display screen and the keyboard through wires respectively.
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