JPS6036614Y2 - Rotor of open-end spinning machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotor for an open-end spinning machine.

A conventional open-end spinning frame is equipped with a spinning device 1 as shown in FIG.

That is, the sliver 2 is fed into the main body of the spinning device 1,
The sliver is fed onto the circumference of the rotating combing roller 5 by the rotation of the feed roller 3 and the pressing action of the prefixer 4 pressing the sliver against the feed roller 3, and the sliver is fed onto the circumference of the rotating combing roller 5. The sliver 2 is opened by the garnet wire 6, and the opened fibers are separated by the action of centrifugal force and the airflow generated in the direction of the arrow in the separation channel 7. Impurities such as fibers and chemical deposits are removed into the dust collection chamber 8 and the fiber passageway (or fiber introduction opening) 9
sent inside.

The fibers fed into the fiber channel 9 are carried into the spinning chamber by a high-speed air current directed from the channel into the spinning chamber 11 of a rotor 10 disposed above it (in FIG. 1).

Here, the rotor 10 is of a self-exhaust type, and as shown in FIG. 2, the rotor bottom 10a has a plurality of exhaust holes communicating from the spinning chamber 11 to the suction duct 15 and extending in the radial direction of the rotor. 13 are provided.

Further, on the upper part of the rotor 10, a rotor and a seal ring 16 are provided.
A labyrinth portion 17 is provided between the spinning chamber and the spinning chamber to prevent air from entering from outside the spinning chamber.

Then, when the rotor 10 is rotated at high speed by the spindle shaft 14, the air in the spinning chamber 11 is discharged through the exhaust hole 13 and the suction duct 1.
5 and is discharged outside the machine.

On the other hand, the fibers from the fiber passage 9 are fed into the spinning chamber 11 where the static pressure has been reduced to below atmospheric pressure due to the high speed rotation of the rotor 10, and are directed toward the focusing groove 12 at the maximum inner diameter of the rotor on the inner wall surface of the rotor. 10b by the action of centrifugal force.

Then, the fibers in the focusing groove 12 are bundled into a ribbon shape and are entangled with the yarn drawn out from the yarn outlet hole 18, so that the rotating rotor 10 and the stationary yarn outlet hole 18 (or the navel 18a forming this) are intertwined with each other. The action heats it up and turns it into thread.

The heated yarn is pulled up from the yarn outlet hole 18 by a pull-out roller (not shown) and wound around a take-up roller (not shown).

However, in this conventional rotor, the spindle shaft 14 is supported by an elastic vibration absorber (not shown) in order to absorb vibrations, so if some external impact that is more than expected is applied to this vibration absorber, the rotor 10 will be damaged. The highly precisely designed labyrinth part 17 provided between the upper outer periphery and the seal ring 16 causes contact between the high speed rotating part (rotor side) and the fixed part (seal ring side). This causes damage to the seal ring 16, the rotor 10, or the spindle that rotatably supports it.

In addition, the static pressure (or negative pressure) inside the rotor is low near the rotation center O of the rotor and increases toward the rotor inner wall surface 10b, as shown by the solid curve in FIG. The fibers discharged from the fiber passage 9 are easily pulled toward the opening on the inside of the spinning chamber of the exhaust hole 13 where the static pressure is low, and when it is difficult to supply the fibers near the rotor inner wall surface 10b, the fibers move to the sitting wall surface 10b. Disturbance occurs in the fibers.

This also caused a problem in that the quality of the yarn heated in the spinning chamber 11 deteriorated.

The present invention was made to eliminate the above-mentioned drawbacks, and it uses a simple rotor structure that does not require the provision of a labyrinth mechanism and can make the static pressure distribution in the spinning chamber as flat as possible. The main purpose is to provide.

Another object of the present invention is to provide a rotor that can stabilize and improve yarn quality and reduce dust accumulation in the spinning chamber.

In consideration of the above-mentioned object, the rotor of the present invention has a spinning chamber defined by a generally conical annular side wall that is open on the small diameter side and a bottom portion connected to the maximum inner diameter portion thereof, and the bottom portion is provided with air in the spinning chamber. In the rotor of an open-end spinning machine, which is provided with a plurality of exhaust holes for exhausting the spinning chamber to the outside, in order to exhaust a part of the air in the spinning chamber from the small diameter side of the annular side wall to the outside, a rotor is provided in the small diameter part. is characterized in that it is provided with at least one fin.

Next, the rotor of the present invention will be explained according to the drawings.

FIG. 4 is a sectional view showing the rotor of the present invention, and the same components as in FIG. 2 are given the same reference numerals.

The rotor 10 has a generally conical annular side wall 10c that is open on the small diameter side, and has a plurality of grooves or fins 19 provided in the radial direction on the small diameter portion, and a rotor bottom 10c as shown in FIG.
It includes a plurality of exhaust holes 13 provided in a.

This fin 19 is rectangular or semicircular (other shapes may be used)
grooves or protrusions at predetermined intervals (every 45 degrees in the figure) at the small diameter end of the annular side wall of the rotor, as shown in Figure 5.
are spaced apart.

Reference numeral 20 is a spindle holder that holds the spindle shaft 14 and forms the duct 15.

By providing the plurality of fins 19 as described above on the upper end of the rotor, that is, on the end face of the open small diameter portion, not only the air in the spinning chamber 11 is exhausted from the exhaust hole 13 by the high speed rotation of the rotor 10, but also the air is A part of it is also discharged from the opening on the small diameter side by the action of the fins 19.

In this way, part of the air in the spinning chamber of the rotor, that is, the air near the small diameter portion of the rotor inner wall surface 10b, is discharged into the suction duct 15 by the fins 19, so that the inner wall surface 10b
The static pressure near the small diameter part of b or near the fiber reaching part from the fiber passage 9 is reduced, and the static pressure distribution in the spinning chamber is favorable as shown by the dotted line in FIG. 3 (i.e., the pressure difference is small). The static pressure curve becomes a static pressure curve, and the static pressure near the fiber reaching portion is greatly reduced compared to the conventional case shown by the solid line.

When the static pressure distribution in the spinning chamber 11 becomes like this, the fibers from the fiber passage 9 can smoothly move to the fiber destination on the inner wall surface 10b of the rotor (in this case, the fibers are moved smoothly toward the spinning chamber). The opening 9a of the fiber passage 9 that is
(The fibers from the fiber passage are inserted into the rotor chamber to the extent that they are not pulled toward the fin side by the air passing through the fiber passage.)
.

As a result, there is almost no tendency for the fibers from the fiber passage 9 to be pulled toward the exhaust hole 13 side, and an increase in floating fibers or bent fibers within the spinning chamber 11 is almost eliminated.

Furthermore, the fibers from the fiber passage 9 contain impurities such as short fibers and dust, which have a relatively small mass, and these impurities are carried by the airflow that passes through the fins 19 in addition to the exhaust hole 13 to the outside of the spinning chamber. This reduces the build-up of fluff at the maximum inner diameter of the rotor.

FIG. 6 shows another shape of the fin of the present invention, in which the radially inner fin portion of the rotor 10 has a fin 19 inclined so as to be located downstream with respect to the direction of rotation indicated by the arrow. is provided at the end of the small diameter portion of the annular side wall 10c of the rotor.

Also, the fins in FIG. 7 are inclined in the opposite direction to the fins in FIG. 6.

Even if the fins shown in FIG. 6 or 7 are used, the same effect as the fins shown in FIG. 5 can be achieved.

Further, although a plurality of fins are provided in the embodiment, it can be understood that even one fin can perform the same function.

As described above, the rotor of the present invention is provided with at least one fin at the end of the small diameter portion of the annular side wall of the rotor in order to exhaust part of the air in the spinning chamber from the open small diameter portion of the rotor. The structure is simple because there is no labyrinth mechanism.

Furthermore, even if the rotor receives some kind of external shock while rotating, the rotor will not come into contact with a stationary seal ring and be damaged, as in the conventional case, and the rotor can be supported rotatably. Damage to the spindle is also eliminated.

Further, since a labyrinth mechanism is not required, failures such as malfunctions or stoppages of the rotor due to fluff accumulation in the labyrinth portion do not occur, and the quality of the yarn is stabilized.

Further, since dust having a small mass is exhausted from the opening of the small diameter portion of the rotor by the fins in addition to the exhaust hole, the accumulation of dust within the spinning chamber can be reduced.

In addition, the action of the fins reduces the static pressure difference within the spinning chamber, making it easier for the fibers fed into the spinning chamber to be pulled toward the inner wall of the rotor, reducing floating fibers and bent fibers within the spinning chamber, and improving yarn quality. It has various advantages.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional spinning device of an open-end spinning frame, Figure 2 is an enlarged sectional view of the vicinity of a conventional rotor, and Figure 3 is a cross-sectional view showing a conventional spinning device of an open-end spinning frame.
The figure shows the static pressure distribution in the spinning chamber with respect to the distance from the rotation center O of the rotor, FIG. 4 is an enlarged sectional view of the vicinity of the rotor of the present invention, and FIG. 5 is an enlarged plan view of the rotor of FIG. 4. 6th
7 and 7 are enlarged plan views similar to FIG. 5, showing another embodiment of the rotor of the present invention. 1... Spinning device, 9... Fiber passage, 1
0...rotor, 10a...field-to-bottom part,
10b... Rotor inner wall surface, 10c...
・Rotor annular side wall, 11...Spinning chamber, 12...
...Focusing groove, 13...Exhaust hole, 15...
...Suction duct, 18... Thread outlet hole, 19.
·····fin.

Claims (1)

[Scope of utility model registration request] The spinning chamber is defined by a generally conical annular side wall that is open on the small diameter side and a bottom portion connected to the maximum inner diameter portion thereof, and the bottom portion is provided with a plurality of exhaust holes for discharging air within the spinning chamber to the outside. In the rotor of an open-end spinning machine,
In order to discharge part of the air in the spinning chamber to the outside from the small diameter side of the annular side wall, at least one
A rotor for an open-end spinning machine characterized by being provided with two fins.