US3893287A - High-speed stranding machine with air cooling - Google Patents

High-speed stranding machine with air cooling Download PDF

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Publication number
US3893287A
US3893287A US460974A US46097474A US3893287A US 3893287 A US3893287 A US 3893287A US 460974 A US460974 A US 460974A US 46097474 A US46097474 A US 46097474A US 3893287 A US3893287 A US 3893287A
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United States
Prior art keywords
rotor
air
housing
machine according
cooling
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Expired - Lifetime
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US460974A
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English (en)
Inventor
Walter Jahne
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MASCHINENFABRIK HERBORN KG
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MASCHINENFABRIK HERBORN KG
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/02—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the supply reels rotate about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the component strands away from the supply reels in fixed position
    • D07B3/04—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the supply reels rotate about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the component strands away from the supply reels in fixed position and are arranged in tandem along the axis of the machine, e.g. tubular or high-speed type stranding machine
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices

Definitions

  • the invention relates to a high-speed stranding machine for the manufacture of stranded wire from individual wires or from ropes of stranded wire, comprising a housing in which a windowed cylindrical rotor is supported rotatably and spaced from the inner wall of the housing, having at least one spool carrier which is pivotally suspended in the rotor and accessible through a window therein, and devices for venting the inside of the housing, wherein on the inside of the housing there are arranged housing partition walls which extend close to the rotor, and which divide the space between the inner wall of the housing and the outer wall of the rotor into
  • High-speed stranding machines are operated at very high rotational speeds and correspondingly high peripheral speeds, such as a rotational speed of 5,000 rotations per minute and a peripheral speed of 120 m/sec. At such high peripheral speeds a very strong air turbulence takes place which is substantially due to the edges of the windows. Such turbulence is not only noisy but also converts much mechanical energy into heat. Even if one would seal a high-speed rotor in a soundproof manner, the problem would not be solved because the heat which is produced by air circulation and bearing friction would lead to such high temperatures as to in hibit or prevent the successful operation of such a machine.
  • the basic purpose of the invention is to further develop a high-speed stranding machine of the type mentioned above so that the air turbulence is reduced at the place where it originates, namely in the window zones.
  • This purpose is attained according to the invention by fixedly connecting with the rotor fan wheels which are arranged to convey air from the window zones into the cooling zones, and by providing that between window zones and cooling zones and between the inside of the rotor and the atmosphere only small flow cross sections exist.
  • Fan wheels which are fixedly connected to the rotor effect, because of the high rotational speed of the rotor, a very strong air jet and permit the production of a considerable pressure differential between suction side and pressure side of the fan wheels.
  • the air pressure in the area of the window zones can be considerably reduced.
  • the smaller air density in the window zones leads to a smaller turbulence and hence less noise and less heat generation.
  • the low pressure effects also an entry of fresh air through the wire guides, which favors the cooling of the otherwise not attainable spool carrier bearings, and return flow occurs through the gap existing between rotor and housing partition walls.
  • the fan wheels have advantageously substantially radially extending blades. This is on one hand advantageous for space reasons and on the other hand the radially extending blades achieve a specially large pressure drop.
  • other fan wheels are also possible, for example axial flow fans.
  • the fan wheels are provided in rotor end walls (inlet part and outlet part) and- /or in the rotor partition walls. This avoids the necessity of special structural parts for the fan wheels because walls for the supporting of the spool carriers are needed anyway on the rotor end walls and therebetween.
  • constructions are also possible in which the fan wheels are formed by special parts which are fixedly connected to the rotor.
  • air jets which act as blades exit from the fan wheels into the space between rotor and inner wall of the housing and in each cooling zone there is arranged at least one air inlet opening and one air outlet opening.
  • the fan wheels which are arranged in the rotor effect at the same time a pumping effect in the housing so that through this housing large amounts of air are moved from outside for cooling the rotor.
  • At least some housing partition walls consist of two or more elemental walls. between which the plenum chambers are provided.
  • the several elemental walls together form a sort ofa labyrinth gland which on the one hand inhibits the propagation of the noise which is created in the window zones and on the other hand prevents an excessive return flow between the cooling zones which are under high pressure and the window zones which are under low pressure. In this manner the desired relatively great pressure difference can be maintained.
  • a fan wheel which is adjacent to a brake pulley is used for cooling same. Characteristics of this are defined more in detail in the subclaims.
  • FIG. 1 is an axial cross-sectional view ofa high-speed stranding machine having two spool carriers within the rotor and FIG. 2 is a cross-sectional view along the line IIII of FIG. 1.
  • the stranding machine has a housing 1 and a rotor 2.
  • the rotor 2 has a cylindrical member 3 which is closed at one end by a rotor end wall 4 and at the other end by a further rotor end wall 5.
  • the end wall 4 is at the inlet side and the end wall 5 is at the outlet side.
  • the end wall 4 has a shaft 6, which is supported in ball bearing means 7, while the outlet side end wall 5 is supported by means of a shaft pin 8 in ball bearing means 9 in the housing 1.
  • a partition wall 10 is also provided in the rotor.
  • Shafts ll, 12 are arranged on the partition wall 10. Similar shafts l3 and 14 are provided on the end walls 4 and 5.
  • the shafts 13 and [I serve to support a spool carrier 15 and the shafts 12, 14 for supporting a further spool carrier 16.
  • the spool carriers are supported on ball bearings 17 and each has a loading weight 18 which together with the form of the spool carrier tends to hold the spool carriers in the position illustrated in the drawing during rotation of the rotor 2..
  • Not illustrated mountings of any suitable type for spools 19, 20 are provided on the spool carriers.
  • Windows 21 are arranged in the region of each spool carrier l5, 16 in the cylindrical member 3 of the rotor 5, which windows interrupt the smooth wall of the rotor. Through this window, the spools 19, 20 are inserted or removed. Flaps. not illustrated, are provided in the wall of the housing 1, which flaps permit an operator to reach through the wall of the housing 1 through the window 21 into the inside of the rotor 2.
  • Wire guides as desired are provided in the rotor 2, namely a guide bore 22 in the end wall 4 and thereafter following are provided eyelets 23, 24, 25, 26, a further guide bore 27 and an outlet eyelet 28 for a wire 29 which is introduced from outside into the rotor and is thereby guided over a guide roller 30 which is supported on the housing 1.
  • a guide 4 bore 32 in the partition wall 10 two following eyelets 33, 34, a guide bore 35 in the end wall 5 and an outlet eyelet 36.
  • a wire 37 which comes from the spool 20 is guided in a guide bore 38 and a central outlet eyelet 39.
  • a brake pulley 40 is connected with the rotor end wall 4, the outer end of which serves at the same time as a V-belt pulley 41.
  • An annular channel 43 is provided between the cylindrical brake pulley 40 and a bearing sleeve 42 of the housing 1.
  • the housing 1 is composed of three main sections 44, 45 and 46.
  • the housing has a substantially larger diameter than the rotor so that between the rotor and the housing a relatively large space is provided.
  • Housing partition walls project from the inner wall of the housing 1, which housing partition walls reach close to the rotor.
  • Each partition wall is formed in the illustrated exemplary embodiment of two elemental walls.
  • the elemental walls 48/49. 50/5l, 52/53 and 54/54 form each one partition wall.
  • plenum chambers 55 are provided between the elemental walls.
  • the walls 48/49 and one wall 56 on the housing define a first cooling zone 57.
  • the walls 48/49 and 50/5l define a window zone 58.
  • the walls 50/5l and 52/55 define 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 zone 62.
  • Fan wheels which are identified by reference numerals 64, and 66 are operated according to the invention in the rotor end wall 4 on the inlet side, the rotor partition wall 10 and the rotor end wall 5 on the outlet side. Said fan wheels convey air from inside of the rotor into the cooling zones 57, 59 and 62 which causes a reduced pressure in the window zones 58 and 60.
  • the fan wheels 64, 65 and 66 have radial blades 67 (FIG. 2), thus are to be considered as radial fans which can create a particularly great pressure differential between the inlet and outlet sides thereof.
  • the channels in the fan wheel 64 are conducted between the blades alternately so that, considered in peripheral direction, the channels alternately enter the cooling zone 57 and the channel 43 between brake pulley 40 and bearing sleeve 42. All channels from the fan wheel 65 enter the cooling zone 59 and all channels from the fan wheel 66 enter the cooling zone 62.
  • FIG. 2 shows that the wall 68 of the housing 1 is arranged eccentrically to the rotor 2 in the region of the cooling zone, namely in such a manner that the radial distance a is a minimum at the highest point of the cooling zone and increases from there toward both sides.
  • FIG. 2 also shows that in cross section approximately triangular channels 69, 70 are provided in the housing, which channels extend alongside the entire housing and open into the ambient atmosphere through windows 71 (see FIG. 1) either directly or indirectly through sound absorbers.
  • windows 71 see FIG. 1
  • Connecting openings 72 and 73 open from the channels 69 and 70 into the cooling zone chamber 59.
  • the air jets which exit from the air channels 74 between the blades 67 flow in radial direction and rotate at the same speed as the fan wheel 65 and therefore act like blades.
  • the stranding machine operates as follows:
  • the rotor 2 After inserting the spools 19, 20 and threading in the wires 31, 37, 29, the rotor 2 is rotated and accelerated to very high rotational speed, for example to 5,000 rotations per minute.
  • the fan wheels 64, 65, 66 thus develop a very strong pumping action and draw air from the inside of the rotor 20b, which causes the window zones 58, 60 to be partially evacuated. This causes a reuted pressure to appear in these zones and a higher pressure in the cooling zones 57, 59 and 62.
  • the edges of the windows 21 act in the inventive machine only with rarefied air, which substantially reduces the turbulence therein as compared with stranding machines in which the window zones are under atmospheric pressure.
  • the individual wires 29, 3i and 37 are joined together in a nozzle 76.
  • the air jets 75 (FIG. 2) produce a pumping action in the cooling zones 57, 59 and 62, through which, depending on the direction of rotation of the rotor, air is either drawn from the channel 70 and conveyed into the channel 69 or air is drawn from the channel 69 and is conveyed into the channel 70.
  • the rotor is surrounded by a large amount of air, which discharges heat from the rotor.
  • the heat which is largely created in the window zones 58 and 60 moves through the solid cross section of the rotor into the cooling zones. This heat conduction is assisted if the rotor is made of a good heat conducting material. Aluminum is well suited as material for the rotor.
  • the pumping action by the air jets 75 is assisted by the change of the cross section in the peripheral direction. This cross-sectional change acts similarly to a spiral housing of a fan.
  • the plenum chambers 55 prevent the propagation of the noise created in the window zones 58, 60.
  • the combination of the housing partition walls of two elemental walls acts like a labyrinth gland which results in a good seal between the areas of low pressure (window zones) and the areas of high pressure (cooling zones).
  • the rotor must be stopped in as short a time as possible, for example in the case of a wire breakage to minimize waste. In present practice stopping times of S to 6 seconds are required. Within this short time a very great kinetic energy must be destoyed. This causes a therefore large amount of heat to be generated in the brake pulley for which reason its cooling by the cooling air which is conveyed by the fan wheel 64 is very useful.
  • a high-speed stranding machine for the manufacture of stranded wire from individual wires or from ropes of stranded wire, comprising a housing in which a windowed cylindrical rotor is supported rotatably and spaced from the inner wall of the housing, having at least one spool carrier which is pivotally suspended in the rotor and accessible through a window which is provided in the rotor, and devices for venting the inside of the housing, wherein on the inside of the housing there are arranged housing partition walls which extend to a point close to the rotor, and which divide the space between the inner wall of the housing and the outer wall of the rotor into window zones and into cooling zones, the improvement comprisng fan wheels fixedly connected to the rotor to convey air from the window zones into the cooling zones and between said window zones and said cooling zones and between the inside of the rotor and the atmosphere only small flow cross sections exist.
  • the air channels have a substantially triangular cross section, which is formed by bottom and sidewalls of the housing and an inner wall of the housing which is approximately concentrical to the rotor.
  • the improved machine according to claim 1 including a brake pulley which is fixedly connected to the rotor for stopping the rotor, and wherein the brake pulley jacket defines an annular channel to the outside and that an adjacent fan wheel conveys air into this channel.

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  • Motor Or Generator Cooling System (AREA)
  • Braking Arrangements (AREA)
US460974A 1973-04-16 1974-04-15 High-speed stranding machine with air cooling Expired - Lifetime US3893287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2319145A DE2319145A1 (de) 1973-04-16 1973-04-16 Schnellverseilmaschine mit luftkuehlung

Publications (1)

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US3893287A true US3893287A (en) 1975-07-08

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ID=5878247

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US460974A Expired - Lifetime US3893287A (en) 1973-04-16 1974-04-15 High-speed stranding machine with air cooling

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US (1) US3893287A (de)
AT (1) AT332254B (de)
DD (1) DD113045A5 (de)
DE (1) DE2319145A1 (de)
IT (1) IT1007924B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640087A (en) * 1983-07-26 1987-02-03 Giorgio Targa Rope-making machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287991A (en) * 1979-04-02 1981-09-08 Donnelly Bernard P Modularized unit load and disposable pallet therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2162131A (en) * 1938-07-01 1939-06-13 William E Somerville High speed stranding or wire rope machine
US2416126A (en) * 1945-08-01 1947-02-18 William E Somerville Rope machine
US3407587A (en) * 1966-05-17 1968-10-29 Winget Ltd Driving and braking of tubular stranders

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2162131A (en) * 1938-07-01 1939-06-13 William E Somerville High speed stranding or wire rope machine
US2416126A (en) * 1945-08-01 1947-02-18 William E Somerville Rope machine
US3407587A (en) * 1966-05-17 1968-10-29 Winget Ltd Driving and braking of tubular stranders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640087A (en) * 1983-07-26 1987-02-03 Giorgio Targa Rope-making machine

Also Published As

Publication number Publication date
ATA254774A (de) 1975-12-15
AT332254B (de) 1976-09-27
IT1007924B (it) 1976-10-30
DD113045A5 (de) 1975-05-12
DE2319145A1 (de) 1974-10-31

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