US3737116A - Machine for winding high-voltage electrical bushings - Google Patents

Machine for winding high-voltage electrical bushings Download PDF

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Publication number
US3737116A
US3737116A US00177371A US3737116DA US3737116A US 3737116 A US3737116 A US 3737116A US 00177371 A US00177371 A US 00177371A US 3737116D A US3737116D A US 3737116DA US 3737116 A US3737116 A US 3737116A
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United States
Prior art keywords
roll
paper
machine
bushing
paper web
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Expired - Lifetime
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US00177371A
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English (en)
Inventor
G Rossi
M Keiser
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Micafil AG
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Micafil AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/28—Capacitor type

Definitions

  • ABSTRACT A machine for manufacturing high-voltage electrical bushings of the condenser type comprises a system of rolls supporting a rotatably driven conductor tube which serves as the core on which a paper web pulled from a supply roll is wound to form the body of the bushing, the roll system being displaceable to accommodate the change in diameter of the bushing as it is progressively enlarged.
  • Rolls of aluminum foil arranged in longitudinally spaced, overlapped relation supply edge-overlapped webs of selectable overall width which are inserted into the paper being wound, at the required different diameters within the bushing body, to form corresponding radially spaced cylindrical capacitive control shields.
  • Rotary knives are also arranged to operate along each edge of the paper web to slit the web as it is drawn off the supply roll and these knives are shifted laterally of the web and independently of each other at a speed coordinated to the winding speed of the bushing body so as to develop a desired conical contour at each end of the completed bushing body when the excess edge material cut off by the knives is removed.
  • This invention relates to an improvement in winding machines for manufacturing high-voltage electrical bushings of the so-called condenser type incorporating shields of conductive material to establish capacitive control of the voltage gradient, and more particularly to an improved machine structure capable of produc ing condenser bushings as long as meters.
  • a principal object of this invention is to provide an improved winding machine which is not only capable of winding condenser bushings up to twice the length heretofore considered practical but which is far more simple, from a viewpoint of construction, and hence correspondingly less expensive to produce.
  • the winding machine is composed of simple structural components, the rolls which support the bushing for rotation about its axis as it is being formed from a paper web, as well as a pre-heating roll to heat the paper material before being wound are not machined, and the tubular core of conductive material on which the paper and condenser shields are wound is driven in rotation by means of a self-locking mandrel which is advanced up to the center of the tube.
  • FIG. 1 is a somewhat schematic view of the essential components of the machine in side elevation
  • FIG. 2 is an elevation taken at a right angle to FIG. 1 and which illustrates the supporting arrangement for the supply rolls of metallic conductive sheet material, preferably aluminum, which is fed into the machine at the proper times and locations to form and distribute the condenser shields throughout the body of the bushmg;
  • FIG. 3 is a central longitudinal section of a completed bushing
  • FIG. 4 is a transverse view showing the selftensioning paper roll holder
  • FIG. 5 is a sectional view of the paper tensioning device
  • FIG. 6 is a schematic view of the system for circulating warming oil through the various rolls which contact the paper web;
  • FIG. 7 is a view of the cutting device by which the side edges of the paper web are progressively trimmed
  • FIG. 8 is a view of the cable device for smoothing the aluminum web inserts.
  • FIG. 9 is a schematic view of the measuring arrangement provided for determining the diameter of the bushing as it is being wound.
  • FIG. 1 depicts a partially completed bushing
  • the bushing 6 is supported for rotation about its axis by a system of three rolls, the rotational axes of which are equally spaced (120 apart) about the axis of the bushing. Included are two lower rolls 1 and 2 whose rotational axes are located in a common horizontal plane and an upper roll 3, carried at the free end of a pivotally mounted support arm 3a, and which is filled with lead shot so as to rest its deadweight on the condenser body 6 as it is being wound.
  • a cable hoist line (not illustrated) drawn by an electric motor can be attached to the support arm 3a to raise and release the latter from the bushing body after it has been completed so as to facilitate its removal from the machine.
  • the front, lower roll 1, over which the paper web 8 is fed to the bushing body as it is being wound is mounted for rotation about an axis which is stationary.
  • THe other lower roll 2 is so mounted that its axis of rotation can be shifted rearwardly, in the direction away from roll 1 as the diameter of the bushing 6 grows during the winding process.
  • the core for the bushing is a tubular conductor 5 which is rotated about its axis by a drive shaft 4 from the output of a variable speed transmission powered by an electric motor, not illustrated.
  • Drive shaft 4 extends into conductor 5 from one end thereof up to the middle of the conductor, and the end of the shaft terminates in an automatically expandable mandrel 7 which frictionally engages the interior wall of conductor 5 to provide the driving connection.
  • the web of paper from which the bushing is formed is drawn from a supply roll 9 and passes over a preheating roll 10 and roll 1 to the conductor tube 5.
  • the paper supply roll 9 is also provided with an automatically operable mandrel structure 11 which is mounted in bearings at both ends and coupled to a disc brake at each end. Braking of the paper supply roll 9 is established by means of a compressed air system, not illustrated, which is controlled by a reducing valve.
  • the pre-heating roll 10 is supported by bearings which are displaceable in the pull direction of the paper and which adapt themselves to movement of the paper web by means of cup springs 12 associated with the bearings.
  • the frame of the machine consists of a suitable arrangement of unmachined structural parts, namely, a system of double-T girders arranged at right angles to each other, and the rolls 1, 2 and 10 are likewise unmachined.
  • Support blocks 14 with two rolls 17 which engage and support the front roll 1 are mounted in a stationary manner on the upper longitudinally extending girder structure, and similar support blocks 16 with support rolls 17 are provided for the rear roll 2.
  • the support blocks 16 are arranged for horizontal displacement on plates 15 of a hardened synthetic resin, and are displaced parallel by means of a screw spindle and a common, motor-driven worm shaft, not illustrated.
  • Rolls 1, 2 and 10 are heated by means of a thermostatically controlled heat transfer oil, which is heated in an oil heater set up outside of the machine and pumped through the interior of the rolls by means of a circulation system in which the rolls 1, 2 and 10 are connected hydraulically in series, illustrated in FIG. 6.
  • Metallic foil 19, preferably aluminum is used to establish the capacitive control shields.
  • the foil is drawn from two parallel rows of axially spaced supply rolls 18a, 18b and the rolls of the two rows are staggered axially by suitable adjustment of the foils in an axial direction so as to provide a certain amount of edge overlap.
  • the cylindrical capacitive shields are distributed throughout the body of the bushing in a radially spaced manner, and the axial lengths of the shields diminish progressively in a radially outward direction.
  • each cutting device 21 is arranged to be shifted independently of each other in a direction transverse to the direction of travel of the web, and at desired rates of movement as a function of the rotational speed of the conductor tube 5 so as to develop any particularly desired configuration, e.g. conical.
  • Each cutting device 21 cuts out a paper strip, whereby removal of the excess internally coned paper bodies 22,23 shown in FIG. 3 after completion of the winding operation is facilitated.
  • the aluminum webs 19 lie smoothly on a guide plate 24 which is movable to the insertion position shown in broken lines, there is provided a cable 25., e.g. hemp rope actuated by pneumatic pressure cylinders which impinges upon the webs so as to make them lie flat on the guide plate.
  • a cable 25 e.g. hemp rope actuated by pneumatic pressure cylinders which impinges upon the webs so as to make them lie flat on the guide plate.
  • an electrical diameter-measuring device which functions on the principle that the length of the paper which runs during each revolution of the bushing body being wound is measured in terms of electrical pulses which are then converted into terms of diameter by means of a computer, and indicated.
  • This diameter-measuring device as shown in FIG. 9 includes a scanning roll 29 in contact with and driven by the paper web 8, the roll 29 being coupled to and driving an electrical pulse generator 26 by means of a belt transmission 30. The electrical pulses are amplified in amplifier 2'7 and then fed to the computer 28.
  • a machine for manufacturing high-voltage electrical bushings of the condenser type by winding a paper web on a tubular electrical conductor which serves as a core and inserting capacitive control shields within the body of the bushing as it is being wound on the core
  • the combination comprising a support frame, a roll assembly on which said tubular electrical conductor is supported for rotation about its axis, said roll assembly comprising at least two roll means initially engageable with and supporting said tubular conductor, said roll means being mutually adjustable relative to said tubular conductor to maintain support therefor as the diameter of the bushing becomes progressively greater during the winding, means for feeding a web of paper to said tubular conductor to be wound thereon, a drive for said tubular conductor, said drive including a drive shaft extending within said tubular conductor and terminating in a mandrel structure engageable with the internal surface of said tubular conductor, and rolls of an electrically conductive metallic foil arranged transversely of said paper web in longitudinally spaced, edge-overlapped
  • a machine as defined in claim 1 for manufacturing high-voltage electrical bushings of the condenser type wherein said means for feeding a paper web to said tubular conductor for winding thereon includes a supply roll of the paper, and means supporting said supply roll for rotation on its axis including an automatically engageable mandrel mounted in bearings.
  • a machine as defined in claim 1 for manufacturing high-voltage electrical bushings of the condenser type wherein said means for feeding a paper web to said w bular conductor for winding thereon includes a supply roll of the paper mounted for rotation about its axis and which further includes a pre heating roll located between said paper supply roll and said roll assembly over which said paper web passes, and means for heating said pre-heating roll and roll assembly by passing a heated fluid therethrough.
  • a machine as defined in claim 1 for manufacturing high-voltage bushings of the condenser type which further includes a plate for guiding the edgeoverlapped webs of metallic foil to the paper web and scanning roll in contact with and driven by the paper web, an electrical pulse generator driven by said scanning roll and a computer connected to the output of said pulse generator for converting said pulses into terms of displayed bushing diameter.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Replacement Of Web Rolls (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
US00177371A 1970-09-07 1971-09-02 Machine for winding high-voltage electrical bushings Expired - Lifetime US3737116A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2044263A DE2044263C3 (de) 1970-09-07 1970-09-07 Wickelmaschine für Hochspannungs-Kondensatordurchführungen

Publications (1)

Publication Number Publication Date
US3737116A true US3737116A (en) 1973-06-05

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ID=5781800

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Application Number Title Priority Date Filing Date
US00177371A Expired - Lifetime US3737116A (en) 1970-09-07 1971-09-02 Machine for winding high-voltage electrical bushings

Country Status (6)

Country Link
US (1) US3737116A (de)
CH (1) CH530075A (de)
DE (1) DE2044263C3 (de)
FR (1) FR2106344A1 (de)
GB (1) GB1325217A (de)
SE (1) SE384291B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804268A1 (de) * 1988-01-18 1989-07-27 Guido Rossi Vorrichtung zum aufbringen einer koaxialen isolation auf einen wicklungskern

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI51642C (fi) * 1976-01-28 1977-02-10 Stroemberg Oy Ab Menetelmä vuorottaisista eristyskalvo- ja metallikalvokerroksista koos tuvan suurjännitekoje-eristyksen valmistamiseksi.
CN113363088B (zh) * 2020-09-17 2022-07-26 沅陵县向华电子科技有限公司 一种贴片电容器加工用夹持设备
CN112271086B (zh) * 2020-09-25 2022-02-18 铜陵隆顺科技有限公司 一种电容器外壳加工用成型卷绕设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1260819A (en) * 1916-05-16 1918-03-26 Bosch Magneto Company Apparatus for winding coil-condensers.
US2276980A (en) * 1939-02-25 1942-03-17 Westinghouse Electric & Mfg Co Condenser bushing winding machine
US2531913A (en) * 1948-05-27 1950-11-28 John E Fast & Co Brake for capacitor winding machines
US2830775A (en) * 1954-02-08 1958-04-15 Escher Wyss Maschf Gmbh Coreless winding of webs
US2955773A (en) * 1955-12-01 1960-10-11 Sprague Electric Co Winding machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1260819A (en) * 1916-05-16 1918-03-26 Bosch Magneto Company Apparatus for winding coil-condensers.
US2276980A (en) * 1939-02-25 1942-03-17 Westinghouse Electric & Mfg Co Condenser bushing winding machine
US2531913A (en) * 1948-05-27 1950-11-28 John E Fast & Co Brake for capacitor winding machines
US2830775A (en) * 1954-02-08 1958-04-15 Escher Wyss Maschf Gmbh Coreless winding of webs
US2955773A (en) * 1955-12-01 1960-10-11 Sprague Electric Co Winding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804268A1 (de) * 1988-01-18 1989-07-27 Guido Rossi Vorrichtung zum aufbringen einer koaxialen isolation auf einen wicklungskern

Also Published As

Publication number Publication date
DE2044263B2 (de) 1974-03-14
DE2044263A1 (de) 1972-05-31
SE384291B (sv) 1976-04-26
GB1325217A (en) 1973-08-01
FR2106344A1 (de) 1972-05-05
CH530075A (de) 1972-10-31
DE2044263C3 (de) 1974-10-10

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