JPS5930808B2 - Support device for rotor shaft in open-end spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for rotatably supporting a rotor shaft in an open-end spinning frame using a twin disk mechanism.

In open-end spinning machines, the rotor shaft supported by a twin-disk mechanism is rotationally driven by a drive belt running perpendicularly on the rotor shaft, so the perpendicular relationship between the rotor shaft and the drive belt is If there is even a slight deviation, an axial force, that is, a thrust force will act on the rotor shaft, causing a positional deviation in the rotor shaft.

Therefore, the rotor shaft and the drive belt must be maintained at a perfect right angle, but it is extremely difficult to precisely set the right angle.

Further, the thrust force acting on the rotor shaft is also generated by meandering of the drive belt.

Therefore, in order to prevent the rotor shaft from shifting its position,
Various methods have been proposed and implemented, including, for example, setting the drive belt or the supporting disk of the twin disk mechanism at an angle slightly offset from the perpendicular direction to the rotor axis to actively apply thrust in one direction to the rotor axis. There is a type in which the rotor shaft is held at a specified position by receiving the rotor shaft with a thrust bearing at the end of the shaft in the direction in which the thrust is applied.

However, it is undesirable from a design and assembly point of view to arrange the drive belt or support disk at a slight angle from the perpendicular direction to the rotor axis, and since the rotor axis rotates at an extremely high speed, the rotor In the case of a type in which thrust is applied in one direction to the shaft and received by the thrust bearing, wear is extremely severe at the contact area between the thrust bearing and the rotor shaft, and when thrust is applied to the rotor shaft by tilting the support disk. However, since the circumferential surface of the support disk comes into contact with the rotor shaft at a portion in the width direction, wear is significant.

The present invention aims to eliminate the above-mentioned conventional drawbacks, and is aimed at reversing the rotor shaft by applying an external force that does not come into direct contact with the rotor shaft, such as the repulsive force of a magnet or the ejection force of a fluid. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, an illustrated embodiment embodying the device of the present invention will be described in detail, in order to provide a support device that prevents displacement by regulating movement in the axial direction.

First, the embodiment shown in FIGS. 1 to 4 will be described.

The twin disk mechanism for supporting the rotor shaft 2 fixed to the rotor 1 is composed of four support disks 3 to 6 arranged at predetermined intervals in the front, rear, left and right directions as shown in the figure.
These support disks 3 to 6 are rotatably supported at their shaft portions by bearings 7 and 8.

The rotor shaft 2 is rotatably supported in a frame-shaped gap between the pair of support disks 3, 4 and 5, 6 of the twin-disk mechanism, and the rotor shaft 2 is rotated at a substantially central position on the rotor shaft 2 in a right angle direction. It is rotationally driven by a drive belt 9 that runs on the drive belt 9.

To prevent displacement of the rotor shaft 2 in the axial direction when the drive belt 90 runs, a disk-shaped movable magnet 10 is fixed to the shaft end of the rotor shaft 2, and the movable magnet 1
On both sides of the movable magnet 100, fixed magnets 11 and 11' are arranged at a predetermined interval with the same polarities facing each other so as to repel each other.

That is, in this embodiment, the movable magnet 10 is connected to both fixed magnets 11.
, 11', the rotor shaft 2 is always positioned at a midpoint where both repulsion forces are balanced by mutual repulsion. Therefore, by setting the repulsive force to be larger than the thrust generated on the rotor shaft 2 due to the running of the drive belt 9, it is possible to prevent the rotor shaft 2 from shifting due to the thrust and to hold the rotor shaft 2 at a specified position. can.

Next, the embodiment shown in FIG. 4 will be explained. In this embodiment, one disk 2 is fixed to the end of the rotor shaft 2, and water or air is applied to both sides of the disk 120. The fluid ejecting nozzles 13 and 13' are arranged to eject fluid such as water or air from a fluid supply device 14 such as a pump or compressor through a boss 15. ' to disk 1
By spraying fluid jetting force in opposite directions to the disc 12 by spraying on both sides of the rotor shaft 2 in a direction parallel to the axial direction of the rotor shaft 2, the rotor shaft 2 is can be held in a specified position.

The embodiment shown in FIG. 5 has two discs 12 on the rotor shaft 2.
, 12' are fixed, and fluid ejection nozzles 13, 13' are arranged between the side discs 12 and 12'.
2 and 12' are applied with fluid ejection forces in opposite directions, and the same effect as the embodiment shown in FIG. 4 can be expected.

In each of the embodiments shown in FIGS. 6 and 7, a member 17 having an annular V-shaped groove 16 is fixed to the rotor shaft 2 (in the case of FIG. 6).
Or, an annular V-shaped groove 16 is formed on the rotor shaft 2 itself (
(in the case of FIG. 7), and the deepest part of the V-shaped groove 16 (
Fluid ejecting nozzles 13 are disposed facing each other in the center (center part), and fluid is sprayed into the V-shaped groove 16 from a direction perpendicular to the axial direction of the rotor shaft 2.

Therefore, according to these embodiments, when a thrust in the axial direction is generated on the rotor shaft 2 due to the running of the drive belt 9 and the rotor shaft 2 is displaced toward the rotor side or the shaft end side, the nozzle 13 Since the contact surface of the fluid ejected from the V-shaped groove 16 is displaced from the center part to the sloped part on the rotor side or the shaft end side, the rotor shaft 2 has a V-shaped groove 16.
The fluid sprayed onto the slope portion of the drive belt 6 is used as a restoring force in the opposite direction to the thrust force generated by the drive belt 9.

As a result, the rotor shaft 2 is returned to the specified position and positional deviation is prevented.

As described in detail above, the present invention utilizes a convex or concave external force receiving portion formed on the rotor shaft, such as a magnet or a V-shaped By acting on the grooves in parallel and opposite directions to the axial direction of the rotor shaft, movement in the axial direction of the rotor shaft can be restricted and displacement of the rotor shaft can be prevented.

Therefore, according to the present invention, there is no need to strictly define the directionality between the drive belt and the rotor shaft, which is of course extremely advantageous in terms of assembly. This solves the problem of wear seen in conventional devices that apply pressure to the shaft and receive it with thrust bearings, so it is possible to obtain sufficient durability even when the rotor shaft rotates at higher speeds. It is something to play.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view of the support device, FIG. 2 is a side sectional view, and FIG. 3 is a front view.
FIG. 4 is a plan view showing another embodiment of the support device, and FIGS.
FIG. 7 is a plan view of main parts showing still another embodiment. 1... Rotor, 2... Rotor shaft, 3~
6... Support disk, 10... Movable magnet, 11, 11'... Fixed magnet, 12, 12
'...Disk, 13,13'...Nozzle, 16...7-shaped groove.

Claims (1)

[Claims] 1. In an open-end spinning machine in which a rotor shaft is rotatably supported by a twin disk mechanism and the rotor shaft is rotationally driven by a drive belt running at right angles above the rotor shaft, a part of the outer periphery of the rotor shaft is In addition to providing a convex or concave external force receiving part, the external force that does not directly contact the rotor shaft, such as the repulsive force of a magnet or the jet force of a fluid, is applied to both sides of this external force receiving part in parallel to the axial direction of the rotor shaft. 1. A support device for a rotor shaft in an open-end spinning frame, characterized in that the rotor shaft is restricted from moving in the axial direction when the rotor shaft is applied in opposite directions.