JPH0333803B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cleaning spinning rotors for an open-end spinning machine in which each rotor is mounted in each rotor housing having an opening for external suction. the rotor housing is opened and the rotor housing is covered by a cleaning device in order to The present invention relates to a cleaning device.

From German Publication No. 26 13 180, an open-end spinning device is known which has means for cleaning the spinning rotor which envelops a movable device which combines blowing and suction towards the spinning rotor.

Moreover, the suction part has a flange placed in a cover against the housing surrounding the spinning rotor.

The cleaning action is achieved by alternately blowing and suctioning the spinning rotor.

In U.S. Pat. No. 4,211,063, two air jets are shown which blow air at different predetermined angles into each focusing groove and into the rotating rotor.

According to these patent specifications, the spinning rotor is
In this method, the rotor rotates during the cleaning operation, and the impurities collected in the focusing groove of the rotor adhere relatively firmly due to centrifugal force, and as a result, it is difficult to achieve a complete cleaning effect.

German Publication No. 2 648 066 discloses that a rotating cleaning brush extends into the rotating rotor and cleans its inner surface, in particular the focusing grooves, in order to remotely clean the rotor. It shows how to enter into contact.

According to German Publication No. 2410269, a flexible groping needle is provided as a mechanical cleaning element for entering the spinning rotor and performing a cleaning action.

The use of brushes is important when impurities are relatively firmly attached to the rotor grooves due to centrifugal force.

However, there is a risk of scratching the inner wall of the rotor during the use of such aggressive cleaning means. Such risks are also added in the use of scrapers.

In this method, the uniformity of the fibers collected and spun in the focusing groove of the rotor is compromised. Also, as fibers and lint are trapped on or wrapped around the brushes, their trapping effectiveness is diminished.

Furthermore, if a brush is used, its wear and tear is relatively high. The above drawbacks can be solved by the present invention. This is because the rotor is brought to a standstill prior to the generation of air jets and by the placement of the cleaning device on the rotor housing,
A circular gap is formed between the blower head surface directed towards the rotor and the free end of the rotor, said gap being located between two parallel planes, and the air is
The suction action is drawn from the opening in the rotor housing through the gap and through the interior of the rotor, and the suction action is maintained once the blower head is thrust into the interior of the rotor and rotated. The air jet is characterized by forming an air jet that rotates intermittently.

The invention also includes a cleaner cover fitted for cleaning on the rotor housing of the rotor;
A cleaning device for carrying out the method, comprising a rotatable blower head, the axis of rotation of which is substantially coincident with the axis of rotation of the rotor, the suction channel being disposed through the cleaner cover. and the blower head is movable from its working position parallel to its axis of rotation, the surface of the blower head directed towards the rotor being located near the free end of the rotor and forming a circular gap with the free end of the rotor. forming a blower head, the blower head enters the second point of application and projects into the interior of the rotor, and is provided with at least one cleaning channel for generating an air jet, the channel directing the compressed air to the cleaning area. The present invention relates to a cleaning device characterized in that it is connected to a compressed air lead for selectively supplying channels.

The complete cleaning provided by the present invention is such that the fiber impurities collected in the focusing groove are carried away through the suction action generated at the start, and then consist of relatively firmly adhered impurities, fine dust particles. It is essentially caused by objects being blown away by a strong jet (for as short a time as possible).

In this method, for both types of impurities, the cleaning action is specifically tailored to be effective against that type.

Embodiments of the present invention will be described in detail below based on the drawings.

1 and 2 show a spinning rotor 11 rotatably supported by journal bearings 12. FIG. The spinning rotor 11 is a rotor housing 1
It is provided inside 3. The rotor housing is provided with a rotor housing opening 14, which is provided for external suction which is used for transporting the sliver during normal operation. The rotor housing is usually closed by a cover, but this cover is not shown in the drawings.
In its place on the rotor housing is a cleaning device 1
5 is placed.

The cleaning device 15 includes a suction channel 16, a cylinder 17, a blower head 18 and a cleaner cover 19. The device 15 is fitted tightly into the open area of the rotor housing 13.

The blower head 18 has a shaft 21 at one end thereof.
The shaft 21 is held by a bearing 2
2 is rotatably supported.

The rotational axes of the rotor 11 and the shaft 21 therefore coincide.

The bearing 22 is supported by a piston 23 which is adapted to move axially on the cylinder 17.

Via the return spring 24, the piston 23 is subjected to a biasing force to the left, ie towards the front side of the cylinder 17 which is directed towards the blower head 18.

A cleaning channel 25 is provided in the blower head 18 for generating an air jet, and one end of the cleaning channel communicates with a vertical hole 26 provided in the shaft 21. Furthermore, a driver channel 27 formed by an air duct is provided to serve to rotate the blower head 18.

Each channel 27 extends radially outwardly on the opposite side of the bore 26 and is bent at right angles in opposed relation to each other near the cylindrical surface of the blower head 18.

As shown in Figure 3, driver channel 2
These curved channel portions 27' of 7 are
At their starting point, they extend approximately tangentially to the surface of the blower head 18 to the surface of the blower head.

The escape of air from the channel portion 27' is as follows:
In order to be able to place the blower head 18 in rotation, it must have at least a tangential motion component on its surface.

A cross-section of the blower head 18 is shown in FIG. 3, taken in a plane transverse to its axis of rotation and thus also perpendicular to the shaft 21, illustrating a possible arrangement of the channels.

Two drive channels 27 with channel portions 27' are provided, which extend in the manner described immediately above.

In comparison with FIG. 2, here instead of one cleaning channel three cleaning channels are provided, arranged at equal angular intervals from each other around the longitudinal hole 26, all of which are substantially in the focusing groove of the spinning rotor 11. and the cleaning channels are individually oriented against entanglement with fiber and debris. If desired, a cleaning channel 33 designed as an air duct can be additionally provided. These serve to carry out a particularly strong cleaning action on the rotor free end 34 of the rotor 11, to which the fibers are relatively firmly adhered. For this purpose, the cleaning channel 33 is directed towards the free end 34.

A compressed air lead 29 serving for selectively supplying compressed air into the interior of the cylinder 17 is located on the front side of the cylinder 17 facing the blower head 18.

For cleaning the spinning rotor 11, the rotor must first of all be brought to a standstill, for example by removing the driving means driving it (not shown), possibly by applying the brakes, and then being closed in normal use. Open the cover (not shown) of the rotor housing 13.

The cleaning device 15 leans against the rotor housing 13 and is led to its upper part, a cleaner cover 19 is applied to the latter and in close contact covers the housing 1
3 to complete the cover.

In this stage of operation, the piston 23, which is pushed to one side by the return spring 24, is in the retracted position shown in FIG.

In this position, the surface of the blower head 18 is directed towards the rotor 11 and forms with the free end 34 of the rotor 11 a circular gap 35, for example several millimeters wide.

The gap 35 is located between two parallel planes, one of which is a plane defined by the rotor free end 34 and the other by the surface of the blower head 18 directed towards the rotor 11. It is a plane that is limited by

Experience has shown that a suction impulse is generated from the suction lead 16 of the cleaning device 15 and passes through the opening 14 in the rotor housing 1 to the rotor housing 1.
3, through the gap 35 between the rotor free end 34 and the blower head 18, through the inner space of the rotor 11, and through the suction channel 16 to the outside, a suction impulse is generated from the air flow indicated by the arrow. It shows.

Since the rotor 11 is stationary during this procedure, this air is carried along with it primarily into the focusing groove 32.
It consists of fibrous debris lying in a ring inside and carrying impurities that can no longer be attached by centrifugal force.

In this way, these impurities are carried away through the gap 35 and the suction channel 16.

Thereafter, compressed air is supplied to the internal air of the cylinder 17 through the compressed air lead 29. This on the one hand causes a counterforce on the piston 23 which is greater than the force of the return spring 24, and the piston 23 is therefore moved to the right.

The blower head 18 has a head that is connected to the rotor 11.
is thrust into the interior space of the body, so that it assumes the position shown in FIG. At the same time, the compressed air passes through the vertical hole 26 and from the vertical hole into the cleaning channel 25 or into the channel 25 and into the drive channel 27 having a channel section 27'.
Go inside.

The air flowing through the channels 27, 27' rotates the blower head 18, and the air flow through the channels causes the spinning rotor to blow away the last remnants of impurities remaining in its focusing grooves. .

These impurities are primarily fine dust particles that adhere relatively tightly to the focusing groove 32, and a strong, sharp air jet must be directed through the channel 25 to remove them. These dust particles are also carried away through the suction channel 16. In a variant embodiment, part 2
The drive channels 27 with 7' are shifted towards the free end of the blower head 18, so that they are blown into the interior space of the rotor 11, in particular into the focusing grooves, and contribute to the cleaning action. Ru.

In this case, they serve both for the operation of the blower head 18 and for cleaning the focusing groove, and can also assist in the cleaning action of the rotor free end 34.

The sharper the air jet, the shorter it can be.
To this end, the outlet of the channel 25 is provided on the outer surface of the blower head 18, which in the illustrated example is substantially annular and cylindrical. If the diameter of the outer surface of the head is chosen as large as possible, the space sandwiched between it and the rotor free end 34 will be small, so that in this method:
The air outlet is brought as close as practically possible to the part for cleaning the rotor 11, in particular to the focusing groove.

Furthermore, a further improvement for the cleaning of the rotor 11 is achieved even if the strength of the rotating air jet changes, and in particular even if air impulses are formed in succession.

In an improved embodiment, three spray impulses are generated one after another for cleaning the rotor 11. Depending on the material and degree of soiling, the length of these spray impulses, or the period of occurrence of these impulses, is between 0.3 and 1.5 seconds, and the interval between spray impulses is between 0.2 and 0.4 seconds. be done.

A pulsating air jet has a greater cleaning effect than a constant flow air jet of the same size.
In particular, in the example of FIG. 2, the pulsating air jet adds to the back and forth movement of the piston 23 in the cylinder 17 and thus also creates a change in the depth of penetration of the blower head 18 into the rotor 11.
This change in penetration depth, in addition to the effect of pulsating the air jet, also causes a particular improvement in cleaning, so that in the exemplary embodiments of FIGS. 1 and 2 the pulsating air jet is indeed It's especially convenient. Pulsating air jets are e.g.
This can be produced by a control valve 36 integrated into the compressed air lead 29 and opened and closed according to the desired time interval.

A further preferred variation of the embodiment shown in FIGS.
8, the longitudinal holes are dimensioned to allow a steady flow of air into the chamber under the action of suction applied via the channel 16. As a result, the airflow surrounding the blower head 18 is directed outwardly from the chamber, which reduces the tendency to attract dust from the rotor into the chamber during operation of the blower head 18.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view illustrating the positions of the spinning rotor, cleaning device, and blower head during suction action.
FIG. 2 is a longitudinal sectional view illustrating the position of the blower head during the spraying operation. FIG. 3 is a cross-sectional view of a blower head illustrating various air channels. 11: Spinning rotor, 13: Rotor housing, 15: Cleaning device, 16: Suction channel, 1
7: Cylinder, 18: Blower head, 19:
Cleaner cover, 21: Shaft, 23: Piston, 25: Cleaning channel, 26: Vertical hole, 2
7: Drive channel, 29: Compressed air lead, 32: Focusing groove.

Claims (1)

[Claims] 1. Each rotor is placed in a respective rotor housing provided with a rotor housing opening for external suction, and the rotor housing of the rotor to be cleaned is cleaned by a cleaning device arranged in the rotor housing. opened and covered by a cleaning device, and the cleaning device generates at least one rotating air jet flow by a rotating blower member;
A method of cleaning a rotor in which the jet stream is directed substantially directly onto the focusing groove of the rotor, the rotor 11 being paused before the generation of the air jet, and the cleaning device 15 being disposed on the rotor housing 13. Thus, a circular gap 35 is formed between the entire surface of the blower head 18 and the free end 34 of the rotor 11.
, i.e. between the two planes, through which air is drawn in through the interior space of the rotor 11 from the rotor housing opening 14 during the suction operation, after which the blower head 18 moves through the interior space of the rotor 11. A method for cleaning a spinning rotor of open-end spinning, characterized in that a rotating air jet is formed during which the spinning rotor is penetrated and rotated, thereby sustaining a suction effect. 2. A method for cleaning a spinning rotor according to claim 1, characterized in that a jet is directly applied to a further position on the rotor 11 that requires particularly strong cleaning. 3. The method for cleaning a spinning rotor according to claim 1, wherein the strength of the rotating air jet is varied. 4. A method for cleaning a spinning rotor according to claim 3, characterized in that the rotating air jet is formed by a series of air pulses. 5. Patent characterized in that the rotating air jet is formed from three air pulses, each air pulse is formed with a duration of 0.3 seconds to 1.5 seconds, and the periodic interval is defined between 0.2 seconds and 0.4 seconds. A spinning rotor cleaning method according to claim 4. 6. Cleaning of the rotor to be cleaned, comprising a cleaner cover 19 arranged on the rotor housing 13 with an opening 14 for suction action and comprising a rotating blower head having an axis of rotation substantially identical to the axis of rotation of the rotor. The apparatus includes a suction channel 16 leading through a cleaner cover 19 and a blower head 18 connected to a rotor 11.
From the operating position of the blower head, in which the front face of the head, which is directed towards the rotor, is located close to the free end 34 of the rotor and forms a circular gap 35 with the free end of the rotor, the blower head 18 enters the interior space of the rotor 11. In the inserted second operating position there is at least one cleaning channel 25 movable parallel to the axis of rotation of the head and used for generating an air jet, the cleaning channel 25 being injected with compressed air. A cleaning device characterized in that it is connected to a compressed air lead 29 used for selectively supplying. 7. The device comprises a cylinder 17 and a rotatable shaft 21 arranged coaxially with the cylinder 17, the shaft 21 having a blower head 18 at one end and movable with a piston 23 inside the cylinder 17. The blower head 18, together with the rotor free end 34, is supported movably in the longitudinal direction of the cylinder in a rotary bearing 22 held by a piston.
7. The spinning rotor cleaning device according to claim 6, wherein the spinning rotor cleaning device is movable into the rotor 11 from a position where the spinning rotor is formed. 8. The shaft 21 has a central vertical hole 26 which opens at its end into the internal space of the cylinder and is directed towards the blower head 18; The patent claim is characterized in that on the front side of the cylinder 17 a compressed air lead 29 is led into the interior space of the cylinder, and that a cleaning channel 25 opens at its end into a longitudinal hole 26. A spinning rotor cleaning device according to scope 7. 9. Spinning rotor according to claim 6, characterized in that the opening in the rotor housing of the suction channel 16 and the opening 14 in the rotor housing are arranged in diametrically opposed relation to each other with respect to the rotor 11. cleaning equipment. 10 The outlet of the cleaning channel 25 is located at a position on the external surface of the blower head 18 and relatively close to the focusing groove 32 when the blower head 18 is thrust into the interior space of the rotor 11. The spinning rotor cleaning device according to claim 6, characterized in that it is provided as follows. 11 The piston 23 is elastically biased towards the front side of the cylinder 17 directed towards the blower head 18, and the pressure on the piston 23 supplied through the compressed air lead 29 causes an elastic biasing effect on the piston. 9. The spinning rotor cleaning device according to claim 8, wherein the spinning rotor cleaning device is larger. 12. In order to generate the rotational movement of the blower head 18, at least one drive channel 27 is formed as an air channel, which air channel is connected with the longitudinal hole 26 and the air exiting the drive channel 27 from the longitudinal hole or at least Device for cleaning a spinning rotor according to claim 8, characterized in that the component of the movement of the air leaving the drive channel is poured tangentially with respect to the annular passage generated by the rotational movement of the air outlet. . 13. Claim 12, characterized in that the air flow created through the drive channel 27 from the blower head 18 to the outlet is directed to the location to be cleaned, in particular into the focusing groove 32. The spinning rotor cleaning device described in . 14 The compressed air lead 29 has this lead 29
Claim 12, characterized in that it comprises a regulating valve serving to regulate the air flowing through it.
The spinning rotor cleaning device described in .