JPS58156031A - Controlling method of cylinder driving in carding machine - Google Patents

Abstract

PURPOSE:To make it possible to control the rotational speed stably by a simple mechanism, by adjusting the gap between linear motors for driving the cylinder and the secondary conductors provided in the cylinder. CONSTITUTION:Doughnut-like secondary conductors 4 and 4 are fixed on side plates 2 of a cylinder 10, and linear motors 5 and 5 are provided oppositely thereto. The linear motors 5 and 5 are mounted on mounting members 7 and 7 and made movable toward and away from the secondary conductors 4 and 4, and the gap (g) between the linear motors 5 and the secondary conductors 4 and 4 is adjusted to control the rotational speed of the cylinder 10. Each secondary conductor 4 is constituted of a doughnut-like magnetic material and an electrically conductive metallic plate, e.g. aluminum or copper plate, closely adhered and fixed to one side of the magnetic material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the cylinder movement of a carding machine using a linear motor.

As shown in the figure, in the carding machine, the cylinder No. 10 located at the center of the card receives the supplied fiber raw material from the take-in roller 11 side, and performs a combing action between it and the rotating flat 12. The receiver delivers the fiber raw material to the dotufa 18 in fixed amounts. The rotation t of the cylinder 10 should be set to a value most suitable for the type and amount of the supplied twill fiber raw material and the conditions of the spinning production level.

However, conventional carding machines run from the motor to the belt, 7'-
Since the cylinder is driven through a transmission system such as pulleys and gears, it is necessary to use means such as changing the belt position of the multistage pulley to change the rotation speed.
It is not possible to make small changes, making it difficult to generally determine the optimum rotation pt.In order to eliminate this discrepancy, it is possible to use a continuously variable transmission or a variable speed motor, but Since the cylinder has an extremely large moment of inertia, the load upon startup is large, and the continuously variable transmission and variable speed motor become large and require a large space, which is not practical.

On the other hand, one disadvantage of the carding machine is that, as mentioned above, the moment of inertia of the cylinder is very large, and the carding machine sips ill for a long time when starting and stopping. The intervention of transmission systems such as belts, pulleys, and gears further facilitates the axial direction. In recent years, the speed of carding machines has increased dramatically, and the cylinders now rotate at extremely high speeds. There was a risk of an IT failure.For example, the wire that could not be wound on the surface of the cylinder 10 could be damaged due to metal fragments being mixed in, or the clothing of the flat 12 could be damaged. Fire 4)
Therefore, furthermore, the connection between the cylinder 10 and the seventh rat 12
There are devices such as r, and devices that syringe in the event of these abnormalities are conventionally known. FIG. 2 is a cross-sectional view showing an example of this type of motor fh. In this figure, reference numeral 1 denotes a rotating body, and this rotating body 1 is constructed integrally with the side plate 2.2, and its rotating shaft is rotatably supported by a -17 receiver 8.8.

The scratch is a donut-shaped secondary conductor fixed to the 0Ill board 2. This secondary conductor scratch is caused by the donut-shaped magnetic material and the intoxicating gold that is tightly fixed on one side of the magnetic material.
(IAI is aluminum plate or side plate) #
The magnetic material side is fixed to the side plate 2.

Then, the linear motor 5 is located opposite to this secondary conductor scratch 4.
．． 5 are attached to each.

In order to control the rotational speed of the rotating body 1 in such a device, the following speed control method has conventionally been adopted.

(+) A method of controlling the rotational speed of the rotating body 1 by changing the driving radius r of the near motor 5.

When the synchronous speed of the linear motor 5 is set to Vs (m/5ec), the synchronous rotation of the rotating body 1 of 1 kNs is given by the following formula. Therefore, the speed of the rotating body 1 is controlled by changing the be able to.

(i) The voltage of the power supply applied to the linear motor 5 is also 11M
A method of controlling the 1iii rotation speed of the rotator 1 by changing the wave P.

However, these conventional speed control methods each have the following problems.

In order to control the speed by moving the near motor 5 in the radial direction by moving the distance 1 in the radial direction of the method of 6), a secondary conductor false is provided over the entire # moving node FJi'I of the linear motor 5. This results in an increase in the radial width of the secondary body weight. By the way, the secondary conductor 4 is always subject to quite high humidity, and therefore the secondary conductor has a small amount of damage.
, j becomes large, it becomes difficult to prevent distortion due to heat generation of the secondary conductor gold. Note that when strain occurs in the secondary conductor strip, the gap between the linear motor 5 and the secondary conductor changes, and as a result, the thrust (torque) of the linear motor 5 changes, and the rotational speed of the rotating body 1 changes. becomes an unexpected value.

In addition, the speed control is performed by moving the linear motor 6 in the radial direction, while keeping the gap between the linear motor 5 and the secondary conductor flaw constant.
Although it is safe to move the , this is technically very difficult.

Problems with method (2) The method of controlling the rotational speed by changing the iv pressure or frequency of the vM source applied to the linear motor 5 has the disadvantage that the power supply device becomes complicated and expensive.

As described above, in the actual state of the method for controlling the movement of a rotating body using a near motor, the present invention provides a method for controlling the cylinder of a carding machine using a linear motor. However, the control method 17 of M++ (2) has the following problems. In other words, as the width of the scratches on the secondary conductor increases, the area on the wire side between it and the near motor 5 becomes larger, which not only makes it difficult to clean, but also causes the cotton to become clogged between the two. It is easy to occur. Even if the carding machine cylinder is driven by the control method in 0) above,
After all, the problem that the power supply device is connected and expensive remains, which is not desirable.

In view of the above circumstances, the present invention provides a drive control method for the cylinder of a carding machine that can perform stable rotational speed control with a simple mechanism in a device that drives the cylinder of a carding machine by a linear motor. It is characterized by controlling the rotation speed by adjusting the distance (gap) between the linear motor and the secondary conductor.

The present invention will be described in detail below with reference to the M plane.

Figure 1 and Figure 3 are diagrams showing the configuration of a cylinder drive device to which the method according to the present invention is applied, and in these figures, the same reference numerals are used for M9 corresponding to each part in Figure 2. Therefore, the explanation thereof will be omitted. In these figures,
10 is a cylinder. Also, the linear motor 5 is installed on the side 7 in the left and right direction (direction of arrow Y shown in the figure).
I+ can be freely installed.

In this case, the possible distance of the linear motor 5 is usually 30 degrees or less.

The diagram shows the gap g (Fll) between the linear motor 5 and the secondary I body 4, and the thrust force F (kg) of the linear motor 5.
) (however, the negativity is constant). As shown in this figure, the thrust force F decreases according to the measurement function as the gap g increases. In this case, thrust F and gap g
The relationship with p oc l- is 9 ・・・・・・・・・・・・・・・
...(2) Represented by the expression k: constant. □ No. 511''/i is a diagram showing 11 of the same LM degree N of the cylinder IO and the thrust force F of the linear motor 5 when the gap g is constant and the lift is constant, and in this diagram, curves l) 1 to D
4, the gap g is g, ~g4 (gl < g
s < gs < g4 ). Moreover, in this figure, the broken lines and ~L each indicate the load characteristics.

As shown in the diagram of Kowara, in the device shown in Figure 3, when the gap g is gradually increased at a constant load, the thrust force F uniformly decreases, and as a result, the rotational speed J, [N uniformly decreases. do. For example, in the case of a load whose load characteristic is expressed by ML shown in FIG. 5, when the a1 gap g is increased sequentially from g1 to g, the 1rii rolling speed N is sequentially decreased from N to N4.

In this way, the λ2 position shown in FIGS. 1 and 3 can control the rotational speed N of the cylinder 100 by adjusting the gap 9 by one.

Note that the characteristics shown in FIG. 5 are the same as the characteristics when the voltage applied to the linear motor 5 is changed.

In this way, by driving the cylinder of the carding machine with a linear motor, it is possible to omit the conventional transmission system such as belts, pulleys, gears, etc.
The cylinder stops due to the so-called 'XψX sub-phase that reverses the direction of movement of the moving magnetic field of the linear motor (the braking force at this time is considerably higher than that of a normal electric motor due to the high slip characteristics of the linear motor), resulting in excellent responsiveness. By adjusting the gap between the linear motor and the secondary conductor and controlling the rotation speed, the cylinder rotation speed can be set to the optimum value and the following advantages can be obtained. .

(1) If the transfer distance of a linear motor is about 30 mm, it is possible to control the speed in practical terms. One aircraft cover can be simply configured as fm.

(2) The width of the secondary conductor only needs to be as small as J3'M because there is no movement in the radial direction of the cylinder of the linear motor. It's also easier to clean because it minimizes the area that can cause cotton candy.

(3) The direction in which the rotational speed changes is determined relative to the direction in which the gap changes, so speed control is easy.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a schematic configuration of a carding machine, Fig. 2 is a front cross-sectional view showing a schematic structure of a rotating body driving device that drives a rotating body by a beam near motor, and Fig. 3 is an embodiment of the present invention. 1I and 5 are diagrams for explaining the speed control characteristics of the embodiment shown in FIG. ISl,l with
FIG. 5 shows the IDI 1i1. of the cylinder when the gap g is constant a. It is a figure showing the relationship between Mj good N and thrust F. Sound: Secondary unit, 5: Linear motor, lO: Cylinder. Applicant Hitogami * W Ki Co., Ltd. Toyota Industries Ltd. Figure 3 10 Bleaching Figure 4 Figure 5

Claims (1)

[Claims] The cylinder of the carding machine is rotationally driven by a linear motor, and the rotational speed of the cylinder is controlled by adjusting the distance between the linear motor and a secondary conductor provided on the cylinder. Cylinder drive and control method for carding machine.