SU68475A1 - Torsional winding mechanism - Google Patents

Description

Torsional-winding mechanisms are known with automatic braking of a coil depending on a change in its speed, by using the centrifugal force of the brake pads connected to the coil, which results in tension on the thread. In such mechanisms, the thread passes through a slider that can slide along a ring mounted on a flyer.

The present invention relates to mechanisms of this kind and differs from them in that for a uniform tension of the thread the ring of the thumb is made elliptical, and its larger radius serves to keep the thumb during normal tension, and the smaller one to skip the thumb at increased tension of the thread. Such a device is intended to reduce the breakage, improve machine performance and facilitate its maintenance as a result of uniform tension of the thread during the spinning process.

FIG. 1 shows a longitudinal section through a coil and a flyer; FIG. 2 - section along the line / - /,

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in fig. 3 shows a section along the // II line and in FIG. 4 is a diagram of the forces acting in the mechanism.

To the existing carriage / (fig. 1) in which a hole of the required diameter is cut, a cup 3 is fastened with a bracket 2, the side walls of which are bored under a small cone. In the bottom of the cup 3 there is a hole for the spindle 4 and a recess for the top cover 5.

The top cover 3, on which the coil 6 is supported, has two studs for seating the coil. Three 7-section sections of sector 7 are attached to the bottom surface of the cover 5. Three brake pads 8 enter the grooves between the bottom surface of the cover 5 and the sectors. During machine operation, the thread tension causes the spool to rotate and with it the top cover 5, and the brake pads 8 with centrifugal force are attached to the side wall of the cup 3. The magnitude of the centrifugal force, and hence the friction force, depends on the weight of the brake pads. With the increase in the speed of the coil centrifugal force, and with it

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and the strength of the friction; defiant i t () is a powerful cat 11 and increases. In this way, automatic replication of the thread is achieved, due to LAi, the following disappears, and in the pulque and the Neo: 1, for the watermakers to regulate the pulsation.

As for additional sharp jumps in the tension of the thread (associated with oscillations in the balloon; in the balloon or due to knockiness of the przhi and other reasons) passing through the eye, creating conditions for breaking the threads in the sliver, i.e. the weakest, not twisted part of the roving at the exit from the exhaust pair, they are regulated in the proposed new design of the flyer with a KF thread for a close eye.

The upper part of the flyer, 9 (Fig. 1), which is put on the spindle as if it were an existing flyer, is a conical, slightly rounded steel cap with two branches with a thickness of MAI. An elliptical ring 70 (Fig. 2) of a T-section is attached to the lower ends of the branches with rivets or screws. Two brackets run} nka // (somewhat resembling a slider of the ring mechanism), of which one is a thread-like eye and the other is used for balancing the first one. Both brackets are strictly balanced and interconnected by a thin flexible steel wire (shown by a dashed line in Figs. 1 and 2), which means that the other is also moving along one brace. Under the action of centrifugal force, both brackets tend to occupy the position furthest from the center of rotation at points A and D (Fig. 4) and, due to the force of friction against the ring, are carried along with the rotation of the ring with the flier, twisting and winding the thread. Under the influence of the thread tension between the coil and the thread-guiding bracket and between the bracket and the exhaust pair, a force /. first to the ring and desiring to peck ahead: kch to position B and B, and y: the stresses at points A and A by friction force; o ring. If the bracket ;; moved to positions B and B, then the centrifugal force Q splits it into Qj, directed normally to the rim of the ring, and Q tends to; return brackets to the original: position A and Aj.

Co: t1shl;: oyushchaya O.-, balancing / guatea comp.; 1. reading from nat: Zhe1: 1I yarn A. between katu; which bracket. /. Consequently, the natkekepe thread in each;, Ann; the first unit corresponds to the magnitude of the force Q.

BECAUSE the elliptical ring with brackets and the katun - {: rotate in one direction, and the ring is ahead of the coil, then when moving the brackets around the ring in the direction opposite to the direction of movement of the ring (from position D and A. to position B and B,), a decrease in the winding of the yarn on the yoke on the yarn segment between the points of contact to the bobbin, which leads to a decrease in the tension of the yarn and causes the return of both brackets to the position A and L.

If a sharp increase in the yarn pitch 1 places both brackets into position C and Q or later, then centrifugal force will cause both brackets to swap places and take positions A and D. The thread section wound over the tr; the ring from the initial position D and D, which is diametrically opposite to them, will be half the circumference of the coil less than the portion of the thread that would wind on the coil if the specified movement of the brackets did not drastically decrease, as a result and further rotation of the mechanism, the normal thread tension specified for this number will be restored again.

Since the mechanism is built on the principle of an advance flier and a lagging coil, the twist value is constant.

The branches of the poryjjbKH are made flat to minimize the resistance of the air to the rotation of poi VJieK. The Aigui Yugimyo Zm Rynging Flyer (. Since the branches of the flyer are connected by an ellipsoid ring. m is eliminated; the centrifugal force is caused by the swelling of the branches of the flyer and conditions are created that allow the number of spindle speeds to be increased.

The presence of a smooth cap in the upper part of the proposed flyer facilitates the stop of the spindle and the rotor (for the PERSON) of the handle

water-skaters

Pre / 1, the lagged mechanism, which has the advantages of the ring mechanism used in cotton making, does not have its drawbacks. The thread-leading bracket only moves over the ring, adjusting the tension of the thread, and ij runs along it at high speed. When rotated at a high speed, particles of water and dust falling onto the ring are dumped, which partly eliminates contamination. On the other hand, ring contamination is not so strongly reflected in the movement of the driving head, since this movement occurs at a low speed.

When moving to the thread guide, the thread experiences friction against the top cap of the flyer. This friction may disappear when a balloon is formed. When using a cylindrical coil and a coil without an upper flange, the diameter of the upper cap can be reduced so much that the thread will not touch it. In sms number, brake pads should be changed 8. The weight of thread-leading brackets is also selected in accordance with the number of yarn produced.

Subject invention

A torsional winding mechanism consisting of an active ring flyer for a runner and a coil equipped with a centrifugal braking device for adjusting the tension of the thread, characterized in that. that in order to obtain a uniform tension of the thread, the ring for the slider is made in the form of an ellipse, the large radius of which serves to keep the slider under normal tension, and small to pass the slider when the tension of the thread increases.

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FIG. one

FIG.

FIG. 3