CH630206A5

CH630206A5 - Method for producing bindings on the rotor of an electrical machine, for fixing a winding in slots in the rotor, and a device for carrying out the method

Info

Publication number: CH630206A5
Application number: CH906978A
Authority: CH
Inventors: Franz Schager
Original assignee: Bbc Brown Boveri & Cie
Priority date: 1978-08-28
Filing date: 1978-08-28
Publication date: 1982-05-28
Also published as: SE7906832L; FR2435146B1; SE441636B; JPH0145313B2; JPS5532491A; DE2839451C2; FR2435146A1; DE2839451A1

Description

Die Erfindung wird im folgenden an Hand schematischer Zeichnungen näher erläutert. The invention is explained in more detail below with the aid of schematic drawings.

Es zeigt It shows

Fig. 1 einen Querschnitt durch eine erste beispielsweise Ausführungsform eines Ringes zur Durchführung des Verfahrens (Schnitt I-I aus Fig. 2), 1 shows a cross section through a first exemplary embodiment of a ring for carrying out the method (section I-I from FIG. 2),

Fig. 2 den Schnitt II-II aus Fig. 1, 2 shows the section II-II from FIG. 1,

Fig. 3 eine Ansicht auf die Ausführungsform gemäss Fig. 1 und 2, 3 is a view of the embodiment of FIGS. 1 and 2,

Fig. 4 einen Querschnitt durch eine zweite beispielsweise Ausführungsform eines Ringes (Schnitt IV-IV aus Fig. 5), Fig. 5 den Schnitt V-V aus Fig. 4, 4 shows a cross section through a second exemplary embodiment of a ring (section IV-IV from FIG. 5), FIG. 5 shows the section V-V from FIG. 4,

Fig. 6 eine Ansicht auf die Ausführungsform gemäss Fig. 4 und 5, 6 is a view of the embodiment of FIGS. 4 and 5,

Fig. 7 einen axialen Teilschnitt durch einen Rotor während der Herstellung der Bandagen (Schnitt VII-VII aus Fig. 8), Fig. 8 den Schnitt VIII—VIII aus Fig. 7, 7 shows a partial axial section through a rotor during the production of the bandages (section VII-VII from FIG. 8), FIG. 8 shows section VIII-VIII from FIG. 7,

Fig. 9 einen axialen Teilschnitt durch einen Rotor mit fertigen Bandagen und Fig. 9 is a partial axial section through a rotor with finished bandages and

Fig. 10 einen axialen Teilschnitt durch den Rotor gemäss Fig. 9, jedoch zwischen den Teilleitern der Wicklung durchgeführt. FIG. 10 shows an axial partial section through the rotor according to FIG. 9, but between the partial conductors of the winding.

Gleiche Teile sind in Fig. 1 bis 10 mit denselben Bezugsziffern versehen. The same parts are provided with the same reference numerals in FIGS. 1 to 10.

Gemäss Fig. 1 bis 3 ist ein Ring 1 einstückig mit mehreren Bolzen 2 mit rundem oder eckigem Querschnitt ausgeführt. In der Zeichnung ist nur je ein Bolzen 2 dargestellt. In der äusseren Fläche des Ringes 1 ist eine äussere Ringnut 3 ausgeführt. Gemäss Fig. 3 besteht der Ring 1 aus zwei Segmenten 1 ' und 1". 1 to 3, a ring 1 is made in one piece with several bolts 2 with a round or angular cross section. Only one bolt 2 is shown in the drawing. An outer annular groove 3 is implemented in the outer surface of the ring 1. 3, the ring 1 consists of two segments 1 'and 1 ".

Die zweite beispielsweise Ausführungsform gemäss Fig. 4 bis 6 zeigt einen Ring 4, der in seiner äusseren Fläche mit einer äusseren Ringnut 5 versehen ist. In der inneren Fläche des Ringes 5 ist eine innere Ringnut 6 dargestellt, die als eine Schwalbenschwanzbefestigung 8 eines Bolzens 7 dient. Diese Befestigung ist also verschiebbar und die Lage der Bolzen 7 kann der Lage der Kühlkanäle des Rotors angepasst werden. Der Ring 4 The second exemplary embodiment according to FIGS. 4 to 6 shows a ring 4 which is provided with an outer ring groove 5 in its outer surface. In the inner surface of the ring 5, an inner annular groove 6 is shown, which serves as a dovetail attachment 8 of a bolt 7. This attachment is therefore displaceable and the position of the bolts 7 can be adapted to the position of the cooling channels of the rotor. The ring 4

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besteht aus drei Segmenten, von welchen zwei Segmente 4', 4" in Fig. 6 gezeigt sind. consists of three segments, of which two segments 4 ', 4 "are shown in FIG. 6.

Die Zeichnungen 7 und 8 zeigen Schnitte durch einen Rotor während der Herstellung der Bandagen. Rotorblechpakete 9 sind mit Profilstegen 10 distanziert, so dass zwischen den radial s angeordneten Profilstegen 10 Kühlkanäle 14 entstehen. Über diese Kühlkanäle 14 sind die Ringe 4 aufgesetzt, die mit ihren Bolzen 7 in die Kühlkanäle 14 hineinragen und somit ihre axiale Lage fixieren. Zwischen den Ringen 4 sind Bandagen 11 angeordnet, die eine Wicklung 13 in den Rotornuten halten. io Die Ringe 4 sind auf der Oberfläche der Rotorblechpakete 9 und der Wicklung 13 mit Hilfe von Hilfsbandagen 12 befestigt, die in den äusseren Nuten 5 der Ringe 4 gehalten werden. The drawings 7 and 8 show sections through a rotor during the manufacture of the bandages. Rotor laminated cores 9 are spaced apart with profile webs 10, so that 10 cooling channels 14 are formed between the radially arranged profile webs 10. The rings 4, which project with their bolts 7 into the cooling channels 14 and thus fix their axial position, are placed over these cooling channels 14. Bandages 11 are arranged between the rings 4 and hold a winding 13 in the rotor slots. The rings 4 are fastened to the surface of the rotor laminated cores 9 and the winding 13 with the aid of auxiliary bandages 12, which are held in the outer grooves 5 of the rings 4.

Die Zeichnungen 9 und 10 zeigen zwei axiale Schnitte durch den Rotor gemäss Fig. 7 und 8 nach der Aushärtung der 15 The drawings 9 and 10 show two axial sections through the rotor according to FIGS. 7 and 8 after the hardening of the 15th

Bandagen 11 und Entfernung der Hilfbandagen 12 und der Ringe 4. Bandages 11 and removal of the auxiliary bandages 12 and the rings 4.

Die Bandagen 11 werden wie folgt hergestellt: Die Ringe 1 oder 4 werden über die Kühlkanäle 14 so aufgesetzt, dass die Bolzen 2 oder 7 in die Kühlkanäle 14 zwischen den Leitern der Wicklung 13 hineinragen und die Ringe 1 oder 4 in axialer Richtung des Rotors fixieren. Die Ringe bestehen aus einem elastischen Material, z.B. aus Aluninium und bestehen zweckmässig aus wenigstens zwei Segmenten 1 ', 1 " oder 4', 4". Die Befestigung der Ringe erfolgt vorteilhaft mittels Hilfsbandagen>12, die zweckmässig aus Stahldraht bestehen. Danach werden die Bandagen 11, die z.B. aus kunstharzimprägnierten Glasfaserbändern hergestellt sind, über die Rotorblechpakete 9 und über die Wicklung 13 gewickelt und ausgehärtet. Nach der Aushärtung der Bandagen 11 werden die Hilfsbandagen 12 und die Ringe 1 oder 4 entfernt. The bandages 11 are produced as follows: The rings 1 or 4 are placed over the cooling channels 14 such that the bolts 2 or 7 protrude into the cooling channels 14 between the conductors of the winding 13 and fix the rings 1 or 4 in the axial direction of the rotor . The rings are made of an elastic material, e.g. made of aluminum and suitably consist of at least two segments 1 ', 1 "or 4', 4". The rings are advantageously attached by means of auxiliary bandages> 12, which suitably consist of steel wire. Then the bandages 11, e.g. are made of resin-impregnated glass fiber tapes, wound over the rotor laminated cores 9 and over the winding 13 and cured. After the bandages 11 have hardened, the auxiliary bandages 12 and the rings 1 or 4 are removed.

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2 Blatt Zeichnungen 2 sheets of drawings

Claims

630206 PATENT CLAIMS

1.Method for producing bandages on the rotor of an electrical machine for fastening a winding in the slots of the rotor, which contains a plurality of rotor laminated cores consisting of laminations of the same outer diameter, with spaced cooling channels being arranged between the laminated cores with profile webs, characterized in that the Cooling channels (14) each have a ring (1,4) placed and fastened, the width of which corresponds at least to the width of the cooling channels (14) and the axial position of which projects into the cooling channels (14) and with the ring (1,4) mechanically connected or one-piece bolt (2,7) is fixed so that the bandage (11) is produced between two rings (1,4), the rings (1,4) serving as lateral boundaries, and then the rings (1,4) can be removed.

2. The method according to claim 1, characterized in that the rings (1,4) from segments (1 1 4 ', 4 ") are assembled.

3. The method according to claim 1, characterized in that the rings (1,4) on the surface of the rotor laminated cores (9) and / or the winding (13) are attached by means of auxiliary bandages (12).

4. Device for performing the method according to claim 1, characterized in that it comprises at least two rings (1,4), from whose inner surfaces project in the radial direction inwards bolts (2,7).

5. The device according to claim 4, characterized in that the bolts (2) with the ring (1) are made in one piece or are mechanically connected to it.

6. The device according to claim 5 with bolts mechanically connected to the ring, characterized in that the bolts (7) with the ring (4) are slidably connected in the circumferential direction.

7. The device according to claim 6, characterized in that the bolts (7) are connected to the ring (4) by means of a dovetail attachment (8).

8. The device according to claim 4, characterized in that the rings (1,4) consist of at least two segments (1 ', 1 ", 4', 4").

9. The device according to claim 4, characterized in that the rings (1,4) are provided in their outer surfaces with an outer annular groove (3,5) for auxiliary bandages (12).

In addition to slot wedges, bandages are increasingly used to fasten windings of electrical machines in rotor slots (cf. Wiedemann / Kellenberger “Construction of electrical machines” Springer Verlag 1967, p. 387 ff). To pull these bandages onto the rotor lamination body, care must be taken to ensure that the bandage material, which is under tensile stress and behaves like a viscous liquid, cannot flow laterally in the axial direction. This support is necessary in particular until the hardening of the bandage material has ended.

The object of the invention specified in claim 1 is to provide a method of the type mentioned in the preamble of claim 1, which ensures in a simple manner a good limitation of the bandages in the axial direction during their manufacture, without taking special constructive measures in the rotor construction to have to.

This object is achieved according to the features of patent claim 1. The advantage of the invention is in particular that the fixation of the bandages described is precise and simple during their manufacture, so that the bandaging of the winding can be carried out quickly and economically. The bolts are fixed in the existing cooling channels. So there is no need to provide additional brackets on the rotor.

Advantageous developments of the invention are described in the dependent claims.

The assembly of the rings from segments according to claim 2 facilitates the assembly and disassembly of the rings. The method according to claim 3 shows a simple way to attach the rings to the surface of the rotor.

The constructive solution according to claim 4 enables a secure fixation of the rings in the axial direction of the rotor. The embodiment according to claim 5 is structurally simple. The bolts are made in one piece with the ring or mechanically connected to it, e.g. screwed in. These variants are suitable if the rings are only used for rotors with known circumferential distances from the cooling channels. The further development according to claim 6 has the advantage that it can also be used for different dimensions of the retors. The embodiment according to FIG. 7 shows a simple possibility of a displaceable fastening of the bolts. The assembly of the rings from at least two segments according to claim 8 facilitates manipulation with the rings. You can e.g. Use a three segment ring that is sized for a specific rotor diameter. Using a fourth, additional segment, the three segments can also be used for a larger rotor diameter. The outer annular groove according to claim 9 fixes the position of the auxiliary bandages.