SK44994A3 - Method of hardening of air-core coil by layering of impregnation layer and device for realization of this method - Google Patents

Abstract

A process is disclosed for consolidating and coating an air-core coil (3) with a winding made of naked electroconductive cables (5) made of twisted wires of substantially rectangular cross-section wound one or several times. A liquid duroplastic synthetic resin mixture is poured on the upper end of the pre-dried coil of the air-core coil rotated around its vertical axis in an impregnating station and flows downwards along the inner and outer surfaces of the coil, if required also between the layers of the coil winding, partially entering the intermediate spaces between the wires of which the conductive cable (5) is composed. The excess of synthetic resin mixture is collected and re-used, and the air-core coil (3) is then cured at a higher temperature. A device for carrying out the process has a chain conveyor system which moves hanging treatment units constituted of a revolving ring (10) to which is secured the air-core coil (3) between several working or processing stations. In the impregnating station (2) the revolving ring (10) is coupled to a driving device (21) in order to rotate the air-core coil (3).

Description

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Method of strengthening the air. imposing an impregnating j / r with t v v and z a r i a d e n i e n s u s k u n n e e t. o h o o o o p o s o b u. Q.bJ asl ^, _ ± SLejuai.h-A :.

The object of the invention is to strengthen the air duct by applying an impregnation layer. The coil of air duct is composed of single or multi-layer windings formed by twisted metal wires which form, bare, electrically conductive ropes substantially with a rectangular cross section. In the impregnation process, the liquid thermosetting mixture of the artificial resin penetrates into the coil and forms a film between the metal wires and the coil surface. Thereafter, the air choke is heat treated, whereby the artificial resin that has penetrated into the coil is formed. These are air ducts without an iron core.

The subject of the invention is also a device through which this method is carried out.

The need for the tech.

Typically, the impregnation process is carried out by immersing the coil in a synthetic resin bath consisting of a thermosetting resin, a hardener and an accelerator. In this way it is used in the tank. a relatively large amount of bituminous mixture on the resin, impregnated with each impregnation process. only a very small number of chokes.

The drawbacks of the known solutions are largely eliminated by the method of strengthening the air coil by applying an impregnation layer according to the invention, the principle of which is that in impregnation and coating on the coil. is at the upper end of the UMWtt coil. in air j j. .1. m .1. v k y rotu jocej o k o i o z i i s i e s i:. θ in b. n c · one or several. 1 account. the artificial feeding: e, which flows down the inner and outer surface of the coil and penetrates into the coil winding space, while it penetrates the inside of the wire, into the space between the metal wires and forms a film on the surface of the coil. .ce is caught under the air diverter and recycled for further use. It is preferred that the air choke is dried at an elevated temperature prior to the impregnation process.

In addition, it is preferred that the air choke is painted after curing.

The apparatus for carrying out this method is preferably formed by a gripping device which allows the air choke to be rotatably mounted about its vertical axis during treatment, by a loading station, by an impregnation station, by a curing station. a station, a station for manual treatment, or a paint shop and unloading station, as well as a transport device that serves to transmit gripping devices by which air chokes are transmitted between stations.

The impregnation station is above the air on its underside. t Imivka ready, on. impregnation preferably provided with a spray nozzle with a slot nozzle orifice which is adjustable in its longitudinal direction, an artificial resin supply system with a reservoir tank, a pump and a collecting tank with a backflow of artificial resin into the inlet system, for an artificial resin.

The transport device preferably. it constitutes one or more chain conveyors and a gripping device which is each equipped with a single rotating ring around the vertical - > - --osi, ·· " which " has " your 'bottom "' "

The impregnating station preferably has a drive device with a drive pinion, which moves the supplied gripping device into the impregnation station by the engagement of the rotary rim.

Finally, it is advantageous if the drive device has a turntable portion of which the pinion is brought into engagement with the turntable.

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BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be further described by way of example only with reference to the accompanying drawings, in which: FIG. 1 shows the impregnation station device in a schematic view in the view direction " arrow 1 in FIG. 3; FIG. 2 shows a partial section 4 of FIG. 1 and FIG. 3 is a schematic representation of the entire apparatus. P roj 1 a d u n c a n n a l a_yyala &

FIG. 1 shows an impregnation station. 2 for impregnating an iron-free air choke 3 consisting of a coil with a single layer of bare, electrically conductive metal wires coiled into a rope 5 with a rectangular cross-section. Glass Fabric Tapes which are distributed around the coil periphery in the direction of the coil axis, as shown in FIG. 1, it serves as a spacing limiter between adjacent coil threads forming the air choke. Third

FIG. 2 are. shown in sectional view 4 of FIG. 1 as a rope Sj. so. and a glass fabric tape which is wound in the direction of the arrow to form folds S which are inserted into the space between adjacent threads. The coil of the air choke .3 It is held on the upper and lower sides by means of two gripping stars which are connected to each other by a central axis 5L. The axis S has a mounting eye at its upper end by means of which it is air - choke 3 - at the side of the rotary ring A chain conveyor 11 is mounted above the rotary ring 1, which is attached to the ceiling structure 12 of the operating hall. The chain conveyor 11 serves. h. in the suspended state, or for its transport in a direction perpendicular to the plane of the drawing. The suspension is fixed using the hanging hooks 1.3 ·. k torí ·? they can. o - rotate in a chain conveyor 1, 1.3 which at its lower end extends an eye in which the rotary ring 11 is mounted on which the air choke 3 is suspended by the hook 14,

The impregnating station 2 further includes a 1L & 3, and a rotatable ring 10 which is provided with an adjusting drive 13 and which has a slot-like orifice on its underside which can be adjusted in the longitudinal direction by means of an adjusting drive. 5. The spray nozzle 16 is connected to an inlet resin system comprising a pump 11 and a reservoir 12. Below the suspended air choke 2 is a holding tank 12 having a return of 2 < 2 > artificial resin to the feed system. The rotation of the air choke 2 is provided by the drive device 21 and the pivoting part. 22, which. it is provided with a drive pinion 25 which can engage with the rotary rim il >.

The entire apparatus for carrying out the method according to the invention consists of a series of working and treatment stations, between which the air chokes 5 are provided by means of a chain conveying system provided with a rotary arm H1 *. The device schematically shown in FIG. 3 has two. the chain conveyors 11, 25 which are connected to each other by a switch 24, the chain conveyor 11 serving the loading station 23 *. pre-heating station 27- ,. impregnation station 2 and in hardening. the station 25, while the chain conveyor -25J is intended to be operated by the multi-station manual treatment station 22, which simultaneously acts as an unloading station and also serves as a paint shop 52. The longer chain conveyor 1.1 has suspension links 13 that are. 'eye 1 stored rotatable and which are. at various workstations blocked, or in the case of loose locks connected to the transport chain to which they are entrained. Pre-heating station 2.2 and curing station 23 which are. made as a hot air oven, as well as a cabin paint shop. 512 have a double door 31 in the inlet and outlet direction. 5 to the slot transport, which in FIG. -i · is not in it and which

The hinged links 13 pass through, so that the air chokes can also be moved with the " 1 "

Said process is carried out by preparing an air choke 3 for treatment. by connecting the rotary ring 10 to the operating unit 32. The operating unit 32 suspended in the loading station 23 into the eye of the base member is via a chain conveyor " H is transferred to a preheating station 22 in which the air choke 3 is thoroughly dried at a temperature in the range of 130 to 150 degrees C. The operating unit 32 then passes to the impregnation station 2a. which is the core of the device. Here, the drive pinion 23 of the drive device 21 is first brought into engagement with the pivot ring 16 by pivoting the pivot portion 22. Thereafter, the driving device 21 and the rotary ring 11 ' Also, with the air choke 3, it is slowly brought into slow rotation. The conductor speed of the air choke 3 is less than 4 cm / s, preferably, for example, 2 cm / s. From storage tank 13. a flowable synthetic resin curing mixture, preferably a curing mixture of epoxy resin containing the accelerator, is introduced through the pump 12 into the spray nozzle 13. The resin mixture then emerges from the slot nozzle of the aperture in the form of a flat, tapering beam 33 and flows then along the inner and outer sides of the coil of the rotating air choke 3. They are. tapes 2 of glass fabric impregnated with a mixture of artificial resin and the surface of the electrically conductive coil ropes 5 covered with a film. From the electrically conductive ropes 5, the mixture of artificial resins penetrates into the spaces between the metal wires from which the ropes 5 are formed. back to the pump side 12 for further use.

The casting of the air choke 3 with an artificial resin mixture takes place, for example, within ten minutes, leaving the resin to drip for another ten minutes. About ten times the amount of artificial resin is poured into the air choke 3 as it remains on it. Thereafter, the operating unit 32 is set after the rotary drive is set and disconnected from the drive device 21a. the rotary rim 13 moved to v y t v r d z o v and c. In the case of air chambers 3, curing at a temperature in the range of 160 to ISO degrees C is maintained. The retention of air duct 2 in the curing station 28 is, for example, 240 minutes, so that, in the optimum case of the treatment of the air chokes 3, it is necessary to ensure that operation simultaneously cured two air ducts 3-

After the curing has been achieved, the operating units 32 are transferred via the switch 24 from the chain conveyor 11 to the chain conveyor 23 by which they are moved. manual treatment, to station 29, which has multiple positions and simultaneously serves as buffer reservoir for operating units 32. At this station 25, various manual work can be performed on rotatably suspended air chokes 2, in particular covering certain areas of air duct 3 prior to subsequent painting. By means of the chain conveyor 25, the operating units 32 are conveyed to the paint shop 33, where the air ducts are subjected to painting and then in turn are returned to the station 25 for manual treatment, where, for example, the paint covers are withdrawn and the air ducts 3 are for example disconnected from the operating unit 32, rotating rims 10 are withdrawn from the finished air chokes 3.

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The way is described. reinforcing an air core without an iron core by applying an impregnation layer with as little as necessary a liquid thermosetting resin resin mixture. Furthermore, an apparatus for performing such a method is described. Method a. the devices are suitable for processing larger air chokes of each d-r u h u.

Claims (2)

A method of compressing an air choke by applying an impregnating layer, the coil of which is composed of a single or multilayer winding of bare, electrically conductive ropes substantially with a rectangular cross section that are. formed by twisted metal wires, wherein in the impregnation process a liquid thermosetting resin resin mixture penetrates inside the coil and into the space between the metal wires and forms a film on the coil surface, followed by heat treatment of the air choke while curing the resin resisted into the coil. m that, in the impregnation, an artificial resin mixture is poured onto the upper end of the coil (3) rotating about its vertical axis by one or more beams (33) of an artificial resin flowing down the inner and outer surfaces of the coil and possibly also entering the coil winding space. between the metal wires and forming a film on the surface, the excess resin mixture being trapped under the air choke (3) and recycled for further use. A method of strengthening an air choke according to claim 1, characterized in that the air choke (3) is dried at an elevated temperature before the impregnation process. The method of strengthening the air choke according to claim 1 but the choke (3) is subjected to painting after the curing. Device μ. of a process according to any one of claims 1 to 3, characterized in It comprises a gripping device for rotatably gripping the air coil (3) around the vertical axis at ení air choke saving (3) by loading. station (6), firstly by a station (27), by an impregnation station. / 2 /, v 'y tough v and c o u the station. / 28 /, by the station. (29) for manual treatment, possibly with paint shop (30) and. an unloading station and further a transport device for moving the gripping devices carrying the air chokes (3) between the stations. Apparatus according to claim 4, characterized in that the impregnation station (2) is provided on its underside above the air choke (3) with a spray nozzle (16) with a slot nozzle opening which is adjustable in its longitudinal direction by a feed system. an artificial resin with a reservoir (18), a pump (17) and a collecting reservoir (19) with a backflow of the artificial resin into the feed system. Device according to claim 4 or 5, characterized in that the conveying device is formed by one or more chain conveyors (11, 25) and the gripping devices are each provided with a rotatable rim (10) rotatable about its vertical axis on whose underside it is suspended air choke / 3 /. Device according to claim. 6, characterized in that the impregnation station (2) is provided with a drive device (21) with a drive pinion (23), by which the gripping device is moved into the impregnating station. Apparatus according to claim 7, characterized in that the driving device (21) is provided with a swiveling device. a portion (22) by means of which the drive pinion (23) is brought into engagement with the rotatable ring (10).