DE2319145A1 - FAST STRANDING MACHINE WITH AIR COOLING - Google Patents

Description

Fast stranding machine with air cooling

The invention relates to a high-speed stranding machine For the production of strands from individual wires or from ropes from strands, with a housing in which a cylindrical rotor provided with windows is spaced from the inner wall of the housing is rotatably mounted and at least one pendulum suspended in the rotor via a window provided in the rotor accessible coil carriers as well as ventilation facilities of the inside of the housing, with housing partitions extending up to close to the rotor being arranged on the inside of the housing which divide the space between the inner wall of the housing and the outer wall of the rotor into the first sections in the window area (window zones) and divide it into further sections (cooling zones).

Fast stranding machines are run at very high speeds and operated correspondingly high peripheral speeds. as

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An example is given a speed of 5,000 rpm and a Circumferential speed of 120 m / secV at these high peripheral speeds a very strong air turbulence takes place, which essentially affects the edges of the window is due. As a result of the turbulence do not arise only strong noise but there will also be mechanical energy converted into heat. One would have a fast running rotor simply encapsulate soundproof, so the heat generated by air circulation and bearing friction would lead to such high temperatures lead that the operation of such a machine would no longer be reasonable. ■

So far, you have encapsulated rotors with additional fans ventilated, it was accepted that the fan in turn caused noises. Another solution consists in an intermediate floor within the rotor housing to be arranged, which on the one hand allows a ventilation of the rotor space in a roundabout way, while the arrangement The spread of airborne noise is prevented by partition walls and calming spaces delimited by these partition walls. The resulting shape of the housing, which deviates from a smooth cylindrical shape, creates an additional twist evoked.

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Also known is a cover for the window planes, while the smooth zones of the rotor are washed by the outside air. Satisfactory results can still be achieved in areas of relatively low speed. If the circumferential speed is increased further, it is not sufficient to flush the smooth zones with calm outside air to achieve sufficient cooling, nor is the only partial encapsulation of the rotor, which also transmits structure-borne noise, sufficient to reduce the noise sufficiently.

± is also known (Offenlegungsschrift 2 064 501) from von Machines driven by electric motors control the flow of cooling air To use electric motor for ventilation of soundproof capsules. There are three possibilities here. First, the Air flows through the engine first; then the cooling for the driven machine is low. Second, the engine sucks the heated air from the soundproof capsule; then the Danger that the cooling for the engine is insufficient. Third, one can see the ejector effect that is blown off by the engine Use air to get additional fresh air through the soundproof capsule to suck. In this case, however, the air blown off by the engine has to do work to add additional air support financially. It is braked, with the engine cooling in turn is hindered.

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In none of the proposed solutions are noise and Heat development "already combated at the place of origin.

The invention is based on the object of a high-speed stranding machine of the type mentioned so that the air turbulence at the point of origin, namely in the Window zones is reduced.

This object is achieved according to the invention in that with the rotor fan wheels are firmly connected to promote the air from the window zones in the cooling zones, and that between There are only small flow cross-sections between the rotor interior and the atmosphere.

Pest with the rotor connected fan wheels cause the high speed of the rotor a very powerful air flow and allow the production of considerable pressure differences between suction side and pressure side of the fan wheels. So lets the air pressure in the area of the window zones decrease significantly. The lower air density in the window areas leads to less turbulence and thus less Noise and less heating. The negative pressure also causes fresh air to flow in through the Wire guides, whereby the cooling of the otherwise unreachable

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bar bobbin bearing is favored, as well as a backflow through the partitions between the rotor and the housing existing gap, is hindered by the spread of the airborne noise still arising in the window zone, while the heat via the rotor, which is preferably made of light metal, a material that conducts heat well, consists of * is dissipated well to the outside. By reducing the air density in the window areas the noise and shedding mechanical energy at the point of its cause.

The fan wheels advantageously have essentially radial blades. This is on the one hand for reasons of space and on the other hand because of the gate part, because with radial running blades a particularly large pressure gradient can be achieved. However, other fan wheels are also possible, e.g. those that are flown through axially.

In a particularly advantageous embodiment of the invention the fan impellers are incorporated in the rotor end faces (inlet part and outlet part) and / or in rotor partition walls. This avoids special components for the fan wheels, because walls for the storage of the coil carriers are necessary anyway on the rotor front sides and in between. Possible are also constructions in which the fan wheels formed by special ropes firmly connected to the rotor

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According to a further development of the invention, the fan wheels emerge in the space between the rotor and the inner wall of the housing as Air jets acting on blades, with at least one air intake opening and one air outlet opening in each cooling zone is arranged. Through this development of the invention cause the fan wheels arranged in the rotor at the same time an Eumpffekt in the housing, so that large through this housing Air quantities for cooling the rotor are conveyed through from the outside. In the subclaims are embodiments for the formation of guides for the through Housing flowing air defines that even under the still The following description of an exemplary embodiment will be explained in part with the aid of the drawing «

According to a further embodiment of the invention exist at least some partition walls made up of two or more elementary walls, between which there are calming rooms. The several Jälementar walls together form a kind Labyrinth seal, through which the propagation of the sound generated in the window zones is hindered and other too strong backflow between the high pressure cooling zones and the low pressure window zones is prevented. That way you can

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the desired relatively large pressure difference can be obtained.

According to a further embodiment of the invention, a a brake disc adjacent fan wheel for cooling the Brake disc used. Features for this are in the subclaims more precisely defined.

An exemplary embodiment of the invention is shown in the drawing. Show it

Pig. 1 shows an axial section through a high-speed stranding machine with two coil carriers inside the rotor and>

Pig. 2 shows a section along line II-II in Pig. 1.

The stranding machine has a designated 1 overall Housing and a total of 2 designated rotor.

The rotor 2 has a cylindrical body 3, which is attached to a End by a Ro tor end wall 4 and at the other end by another rotor end wall 5 is completed. The front wall 4 is on the inlet side and the end wall on the outlet side. The end wall 4 has a bearing pin 6,

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which engages in a ball bearing 7, while the outlet side End wall 5 by means of a bearing pin 8 via a ball bearing 9 is mounted in the housing 1. .- .. · "

An intermediate wall 10 is also located in the rotor. Bearing journals 11, 12 are arranged on the intermediate wall 10. Similar Bearing pins 13 and 14 are located on the end walls 4 and 5. The journals 13 and 11 are used to support a bobbin 15 and the journals 12, 14 for the storage of a further coil carrier 16. The coil carriers are on ball bearings 17 stored and each have a weighting weight 18 at the bottom, which together with the shape of the coil support causes the coil carriers strive to maintain the position shown in the drawing even when the Maintain rotor 2. There are not shown receptacles for coils 19 »20 on the coil carriers.

In the area of each coil carrier 15, 16 are in the cylindrical Body 3 of the rotor 5 window 21 arranged, which the smooth Interrupt the wall of the rotor. Through these windows the coils 19, 20 are inserted or removed. In the wall of the housing 1 there are not shown flaps, which allow through the wall of the housing 1 through to reach through the window 21 into the interior of the rotor 2.

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In the Eotor 2 there are various wire guides, namely one Pührungsbohrung 22 in the end wall 4 and this subsequent Eyes 23, 24, 25 »26, another guide hole 27 and an Etasas exit eyelet 28 for a wire 29, which from the outside is introduced into the rotor and thereby via a on the housing 1. mounted pulley 30 is performed. A guide hole is used to guide a wire 31 coming from the spool 19 32 in the partition 10, two subsequent eyelets 33, 34, a guide hole 35 in the end wall 5 and one Exit eyelet 36. A wire 37 coming from the spool 20 is guided in a guide hole 38 and a central exit eyelet 39.

A brake disk 40 is connected to the rotor end wall 4, the outer end of which also serves as a V-belt pulley 41. Between the cylindrical brake disc 40 and a bearing sleeve 42 of the housing 1 is an annular channel

The housing 1 is composed of three main sections 44 »45 and 46. The housing has a much larger diameter than the rotor, so that between the rotor and the housing there is a relatively large gap.

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On the inner wall of the housing 1, housing partitions are supported alo, the Ms reach close to the rotor. Every partition is in the illustrated embodiment from two üllementarwwall educated. The elementary walls 48/49, 50/51, 52/53 and 54/54 'each have a partition. Between There are calming rooms 55 on the elementary walls. The walls 48/49 and a wall 56 on the housing border a first cooling zone

57 from. The walls 48/49 and 50/51 border a window zone

58 from. The walls 50/51 and 52/55 again delimit a cooling zone 59, the walls 52/53 and 54/54 'a window zone 60 and the walls 54/54 'and a housing wall 61 a cooling one 62.

In the rotor end wall 4 on the inlet side, the intermediate rotor wall 10 and the rotor end wall 5 on the outlet side are fan wheels designated as a whole by 64, 65 and 66 according to the invention incorporated. These fan wheels promote air from the inside of the rotor into the cooling zones 57, 59 and 62, whereby in the Window zones 58 and 60 a negative pressure is generated.

The fan wheels 64, 65 and 66 have radial blades 67 (see fig. 2), are therefore to be regarded as radial fans, which have a particularly large pressure difference between the suction side and Can produce exhaust side.

In the case of the fan wheel 64, the channels between the blades are alternating guided so that viewed in the circumferential direction

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Channels alternately enter the cooling zone 57 and the channel 63 between the brake disk 40 and the bearing sleeve 62. From the Fan wheel 65, all the channels enter the cooling zone 59, and from the fan wheel 66 all channels enter the cooling zone 62.

From Pig. 2 it can be seen that the wall 68 of the housing 1 in The area of the cooling zones is arranged eccentrically to the rotor 2 in such a way that the radial distance a is smallest at the highest point of the cooling zones and from there to both Sides increases.

Pig. FIG. 2 also shows that channels 69, 70, approximately triangular in cross section, are incorporated into the housing, which pass along the run throughout the housing and over window 71 (see Pig. 1) discharge into the environment either directly or indirectly via a silencer. In the area of each cooling zone there is also a upwardly protruding housing projection 71 is provided, the close reaches up to the rotor and thereby separates the cooling zone space 59 between the banals 69 and 70. Of the channels 69 and 70 open connection openings 72 and 73 into the cooling zone space 59.

The air jets 75 emerging from the air channels 74 located between the blades 67 flow in the radial direction and rotate at the same speed as the fan wheel 65 and therefore act like blades.

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The stranding machine works as follows.

After inserting spools 19, 20 and threading the wires 31 ,. 37, 29 the rotor 2 is set in rotation and accelerated to very high speeds, e.g. to 5,000 rpm. Here the fan wheels 64, 65, 66 develop a very strong pumping action and suck air from the interior of the rotor 2, with naturally the window zones 58, 60 are also partially evacuated. A negative pressure is therefore formed in these zones and in the cooling zones 57, 59 and 62 an overpressure. The edges of the In the machine according to the invention, windows 21 only interact with dilute air, which causes the turbulence work This is significantly reduced compared to stranding machines in which the window zones are under atmospheric pressure. As a result of the Negative pressure inside the rotor is created through the guide bores 22, 35 »38 and 27 vigorously sucked in air, as a result of which heat is dissipated from the bearing journals 13 and 14, which yes arises from the bearing friction in the ball bearings 17 as well as 7 and 9. During the rapid rotation of the rotor 2, the coil carriers 15, 16 essentially stop. You will be because of The bearing friction is a little dragged along in the direction of rotation, but must not rotate together with the rotor.

The single wires 29, 31 and 37 are brought together in a nozzle 76.

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The air jets 75 QFig. 2) produce in the cooling zones 57, and 62 a pumping action through which, depending on the direction of rotation of the Rotor either air is sucked out of the channel 70 and into the channel 69 is conveyed or air is sucked in from the channel 69 and conveyed into the channel 70. Through this air promotion a large amount of air flows around the rotor, which dissipates heat from the rotor. The warmth that is mainly in the window areas 58 and 60 arises, migrates across the material cross-section of the rotor into the cooling zones. This heat conduction is favored, when the rotor is made of a material that conducts heat well ". Aluminum is well suited as a material for the rotor. The The pumping action by the air jets 75 is "promoted by" the change in the cross-section in the circumferential direction. These Changes in cross-section have a similar effect to a volute casing a blower.

The calming rooms 55 hinder the reproduction of the in the window zones 58, 60 arising noises. The composition the housing partitions made of two elementary walls (more than two elementary walls could also be used) acts like a labyrinth seal, which creates a good seal between the rooms of low pressure (J window zones) and the rooms of high pressure (cooling zones).

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It should be possible to stop the rotor as quickly as possible, e.g. to minimize scrap in the event of a wire break let develop. Deceleration times of 5 to 6 seconds are achieved today. Within this short time a very large amount of kinetic energy must be destroyed. The brake disc therefore heats up very much, which is why yours Cooling by the cooling air conveyed by the fan wheel 64 is very useful is. -

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Claims (13)

2319U5 Claims; J 1. j High-speed stranding machine for the production of strands jSingle wires or ropes made of strands, with a housing, in which a cylindrical rotor provided with windows is rotatably mounted at a distance from the inner wall of the housing and at least a bobbin carrier suspended in a pendulum motion and accessible through a window provided in the rotor, as well as Means for ventilating the interior of the housing, wherein at the Inside of the housing reaching close to the rotor Housing partitions are arranged, which the space between Housing inner wall and rotor outer wall in first sections in Penster area (window zones) and into further sections Subdivide (cooling zones), characterized in that with the Rotor (2) firmly connected air from the window zones (58, 60) into the cooling zones (57, 59, 62) conveying fan wheels (64, 65, 66) and that between window zones (58, 60) and cooling zones (57, 59 »62) and only small flow cross-sections exist between the rotor interior and the atmosphere. 2. Machine according to claim 1, characterized in that the fan wheels (64, 65, 66) extending substantially radially Have blades (67). -16-409 844/0536 23Τ91Λ5 3. Machine according to claim 2, characterized in that the fan wheels (64, 65, 66) are components of the rotor end walls (4, 5) and / or the rotor partition walls (10) are, 4. Machine according to one of the preceding claims, characterized characterized in that from the fan wheels (64, 65, 66) into the space (57, 59, 62) between the rotor (2) and the inner wall of the housing as Air jets (75) acting on blades emerge and that in each cooling zone (57, 59, 62) an air intake opening (72 or 73) and an air outlet opening (73 or 72) is arranged. 5. Machine according to claim 4, characterized in that im lower area of the housing (1) along the sides of the housing air ducts (69, 70) which are directly or indirectly connected to the ambient air and that between these air channels (69, 70) and the cooling zones (57, 59, 62) connections (72, 73) exist. 6. Machine according to claim 5, characterized in that the Air ducts (69, 70) have an essentially triangular cross-section through the bottom and side walls of the housing (1) and an inner wall of the rotor that is approximately concentric to the rotor Housing is formed. -17-409844 / 05 36 2319H5 7. Machine according to one of claims 4 Ms 6, characterized in that that between the air inlet opening (72 or 73) and Air outlet opening (73 or 72) in each cooling zone (57, 59, 62) is arranged a wall (71) close to the rotor (2). 8. Machine - according to one of claims 4 Ms "7» - characterized in that that at least in the cooling zones (57, 59, 62) the The housing wall (68) extends relative to the rotor (2) in such a way that the flow cross-section is seen in the circumferential direction of the rotor (2) in the cooling zones (57, 59, 62) initially reduced and then increased again. 9. Machine according to claim 8, characterized in that the Housing (1) is essentially cylindrical, but at least runs eccentrically to the rotor (2) in the cooling zones (57, 59, 62). 10. Machine according to one of the preceding claims, characterized characterized in that at least some partition walls are made up of two or more elementary walls (48/49, 50/51, 52/53, 54/54 ') exist, between which there are calming rooms (55). 11. Machine according to one of the preceding claims.mit one Brake disc firmly connected to the rotor for stopping of the rotor, characterized in that the brake disc casing 409844/0536 . · -18- 2319U5 an annular channel (53) to the outside "bounded and that an adjacent fan wheel 64 conveys air into this channel (43), 12. Machine according to claim 11, characterized in that between the blades (67) of the adjacent fan wheel (64) air channels (74) located alternately open into the annular channel (43) and into the adjacent cooling zone (57). 13. Machine according to one of the preceding claims, characterized in that the rotor casing consists of a highly thermally conductive Material, preferably made of aluminum. 40984 4/0536 L e r s e i t e