GB2086440A

GB2086440A - Drive housing for a textile machine

Info

Publication number: GB2086440A
Application number: GB8132609A
Authority: GB
Original assignee: W Reiners Verwaltungs GmbH
Current assignee: W Reiners Verwaltungs GmbH
Priority date: 1980-11-03
Filing date: 1981-10-29
Publication date: 1982-05-12
Also published as: IT1142923B; JPS57106725A; DE3041269A1; IT8149613A0

Abstract

A drive housing for a textile machine, particularly for a spinning and/or winding machine, encloses a driving unit, driving elements and housing ducts for driving elements. The drive housing 1 has a fresh air forced ventilation device 18, by which excess pressure is maintained in the interior of the drive housing in respect of the atmospheric pressure. Thus the ingress of fibres is prevented. <IMAGE>

Description

SPECIFICATION Drive housing for a textile machine, particularly for a spinning and/or winding machine The invention relates to a drive housing for a textile machine, particularlyfora spinning and/orwind- ing machine.

In drive housings of this kind the driving unit includes, for example, one or more electric motors, gearings, chains, gear wheels, shafts, driving belts or the like. All these parts are more or less sensitive to fly fibre. In electric motors with external fan cool ing the fibres may accumulate, for instance, on the fan guard, thus reducing the airthroughput required for the cooling. Motors of this kind may break down as a result of overheating. Fibres also impede the cooling process by settling on the fan blades and cooling fins.

Attempts have already been made to protect the drive housing against the ingress of fibres by means of fine-meshed screens. Such measures, however, are only temporarily successful, for as soon as a screen of this kind is covered with fibres the cross section of the free passage through it is seriously reduced and contaminated air passes into the drive housing via the housing ducts, slits, door fittings and other apertures.

The purpose of the invention is to prevent interference with the operation of the driving units, driving elements or the like present in the drive housing of a textile machine by the ingress of dust and particularly of fibres.

According to the invention there is provided a drive housing for a textile machine, particularly for a spinning and/or winding machine, having a driving unit, driving elements and housing ducts for driving elements, characterised by the fact that the drive housing has an air forced ventilation device, by which excess pressure is maintained in the interior of the drive housing in respect of the atmospheric pressure.

Automatic cooling with fresh air alone is insufficient. Only when an excess pressure in respect of atmospheric pressure is maintain in the drive housing will the entry of dust and fibres into the latter be reliably prevented.

The fresh air can be taken, for example, from a fresh air chamber. No special fresh air chamber is required, however, if in accordance with a further version of the invention the automatic fresh air cooling device consists of a fan connected on its pressure with the drive housing and provided on its suction side with a dust filter. The dust filter may consist, for example, of a fine-meshed wire screen in which the entire cross section of the free passage is so large that even over a comparatively lengthy period no obstruction need be feared.If it is desired, however, to avoid recourse to such a large filter, the fan in a further embodiment of the invention may be provided, for example, with a driving device of which the direction of rotation is reversible and which is connected with a reversing device, in such a way that the direction of rotation is reversed for a brief period at certain intervals of time. As a result of the brief reversal in the direction of rotation a sudden extra flow takes place through the filter in the reverse direction, so that any deposits are blown away from its surface. Any fluff that has already formed on the surface of the filter will be flung off by the said "surge", so that the filter is then once again free of contamination by foreign matter.

If it is uneconomical to provide an atmosphere completely free of dust or fibres inside the drive housing, it is proposed in a further version of the invention provided that the driving unit should be provided with a reversible driving device for a fan having a dust filter on its suction side and that the driving device should be connected with a reversing device in such a way that a brief reversal of direction takes place at certain intervals of time.

An extraneously cooled motor can be provided with cooling air, for instance, by means of a motordriven fan having a dust filter on its suction side. By the brief reversal of the direction of rotation of the fan motor this filter likewise is freed of any fibres of fluff adhering to it. The fluff or fibres fall to the ground and remain lying thereon or in a collecting vessel. The filter can be positioned inside or outside the drive housing.

If the automatic fresh air ventilating device breaks down or has to be temporarily dismantled, this sytem at least makes it possible for the most important parts of the driving unit, e.g. the driving motor, to be protected from contamination by dust and fibres.

An example of the invention is illustrated in the drawing. The invention will be explained and described in greater detail by reference to this example.

The drawing shows a drive housing 1,which is to have covering plates as guards on every side. The textile machine in question is not shown in detail, the drawing only containing driving elements taking the form of shafts 2 and 3 leading outwards through ducts 4 and 5 in the housing. Inside the drive housing 1 may be seen a driving unit marked 6 as a whole. The driving unit 6 includes a driving motor 7 connected via a transmission 8 to a gearing 9 which drives the two shafts 2 and 3. The driving motor 7 is extraneously cooled and surrounded by a housing 10 terminating in a pipe 11 containing a fan 12. On the suction side of the fan 12 the pipe 11 is covered by a dust filter 13. The driving device 14 in the form of a fan motor is connected via a conductor 15 with a reversing device 16 in such a way that a brief reversal of direction takes place at certain intervals of time.The reversal of direction of rotation can be brought about, for example, by means of a switch 17.

The driving housing 1 has an automatic fresh air cooling device marked 18 as a whole. The automatic fresh air cooling device 18 consists of a fan 19 connected on its pressure side with the interior of the drive housing 1 and provided on its suction side with a dust filter 20. The fan 19 is mounted on the shaft of the driving device taking the form of a driving motor 21 of which the direction of rotation is reversible and which is connected by a conductor 22 with the reversing device 16 in such a way that a brief reversal of direction of rotation takes place at certain intervals of time, although this can likewise be brought about by operating the switch 17.

By the automatic fresh air cooling device 18 an excess pressure in relation to the atmospheric pressure is maintained inside the drive housing 1. The spent air escapes of its own accord via an air outlet 23, the ducts 4 and 5 in the drive housing and also any leaks in the latter.

During operation a layer of fibrous fluff gradually accumulates on the dust filter 20. Fibres or a corres pondinglythinner layer of fluff may likewise accumulate on the dust filter 13. If the motors 14 and 21 are now and again briefly reversed in their direction of rotation, e.g. by hand, with the switch 17, or by means of a timing mechanism, the accumulations of fibre drop off the dust filters 13 and 20 as a result of the counter current Fibre thus removed from the dust filter 20 falls onto the floor, while fibre detached from the dust filter 13 falls into a collector vessel 24.

The invention is not confined to the example illustrated and described. In particular, the units, driving elements and other individual components in the drive housing 1 do not necessarily have to be exactly as stated. For example, the driving motor7 could be situated on a frame, like the frame 26 bearing the gearing 9, instead of on a base 25. The driving motor 21 of the fan 19 could, for example, be mounted outside the drive housing, in a supplementary structure or in a feed conduit, instead of on the brackets 27 situated inside the drive housing 1. The outlet 23 for the spent air can be eliminated altogether if the other outflow apertures are sufficiently numerous and have large enough cross sections. The air outlet 23 could also be protected against the ingress of infiltrated air by means of non-return flaps, such as those of a louvre. Instead of the motors of which the direction of rotation is reversible it would also be possible for gearings reversible in their direction of rotation to be used as driving devices for the ventilator and/or fan. A reversible gearing of this kind could, in its turn, be driven by an existing motor, such as the driving motor 7.

Claims

1. Drive housing for a textile machine, particularlyfora spinning andlorwinding machine, having a driving unit, driving elements and housing ducts for driving elements, characterized by the fact that the drive housing 1 has an air forced ventilation device 18, by which excess pressure is maintained in the interior of the drive housing in respect of the atmospheric pressure.

2. Drive housing in accordance with Claim 1, characterized by the fact that the air forced ventilation device 18 consists of a fan 19 which is connected on its pressure side with the interior of the drive housing 1 and provided on its side with a dust filter 20.

3. Drive housing in accordance with Claim 2, characterized by the fact the fan 19 has a driving device 21 reversible in its direction of rotation and connected with a reversing device 16 in such a way that a brief reversal of direction of rotation occurs at certain intervals of time.

4. Drive housing in accordance with one of Claims 13, characterized by the fact the driving unit 1 has a directionally reversible driving device 14 of a fan 12 provided on its suction side with a dust filter 13 and that the driving device 14 is connected with a reversing device 16 in such a way that a brief reversal of direction of rotation occurs at certain intervals of time.

5. Drive housing for a textile machine, substantially as described herein with reference to the accompanying drawing.