JPH0145313B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Along with key grooves, so-called bandages are increasingly being used to secure coils in slots of rotors in electrical machines. In order to wrap this bandage onto the laminated core of the rotor, the bandage material (for example, glass fiber impregnated with a synthetic resin) must be partitioned so that it does not enter into the gaps between the partially laminated core packets separated from each other. It is necessary to provide This partition or support is especially necessary until the bandage material has finished curing.

The object of the invention is to provide a method of the type envisaged in claim 1, which ensures a good partitioning of the bandage in the direction of the rotor axis during bandage formation, and for which a special structure is provided on the rotor itself. The object of the present invention is to provide a method that does not require the above treatment. This object was achieved by the present invention as follows. That is, as set forth in claim 1, a ring is provided on each cooling passage having a width at least corresponding to the width of the cooling passage, and is mechanically connected to or integrally attached to the ring. axially positioned, fitted and fixed by pins inserted into the cooling passages.
The bandage is applied between the two rings using these rings as lateral partitions, and then the rings are removed.

The advantages of the present invention are particularly as follows. That is,
The positioning of the bandage as mentioned at the outset during bandage formation is accurate and simple, so that bandage fixation of the coil can be carried out quickly and economically. The pins are seated within cooling passages provided in the rotor itself. In short, there is no need to provide any additional holding means on the rotor side.

According to one embodiment, the ring is constructed from a plurality of segments to facilitate fitting and removing the ring. According to another embodiment, a simple fitting of the ring onto the rotor circumferential surface is possible by using an auxiliary bandage.

A reliable fixation of the ring in the axial direction of the rotor is ensured by using at least two pins with inwardly projecting pins as a device for carrying out the method of the invention. According to one embodiment, the pin is made integrally with the ring or is mechanically connected, for example screwed. Rings in which the pins are mechanically connected are particularly suitable for use in rotors in which the cooling channels are interrupted in the circumferential direction. According to another embodiment, the pin is displaceably connected to the ring in its circumferential direction, so that the ring can be used effectively to accommodate different rotor dimensions. This displaceable connection is, for example, a dovetail joint. According to a further embodiment, the ring is made up of at least two segments, thereby facilitating the fitting of the ring. For example, three segments may be used to construct a ring with dimensions that match a given rotor outer diameter, and if a fourth segment is used, the remaining three segments can also be applied to another rotor with a larger outer diameter. . Forming a ring groove on the outer peripheral surface of the ring is advantageous for use with an auxiliary bandage.

The invention will now be explained with reference to the embodiment shown in the drawings: According to FIGS. 1 to 3, a ring 1 is made in one piece with a number of pins 2 having a circular or square cross section. In the drawing, this pin 2 is 1
Only one is shown. One ring groove 3 is formed on the outer peripheral surface of the ring 1. In the example of FIG. 3, the ring 1 consists of two segments 1', 1''.

According to the second embodiment shown in FIGS. 4 to 6,
The ring 4 has one ring groove 5 formed on its outer circumferential surface, similar to the first embodiment, but also has one ring groove 6 formed on its inner circumferential surface, and this ring groove 6 is located where the pin 7 is located. It forms a joint fixing part 8.
In this case, the pin 7 can be pushed in the ring groove 6 and adapted to the position of the cooling channel of the rotor. This ring 4 consists of three segments, two of which are segments 4',
4'' is shown in FIG.

7 and 8 show the rotor in cross-section during the formation of a bandage. The laminated core pieces 9 are spaced apart by forming webs 10, thereby forming cooling passages 14 between a number of radially arranged forming webs 10. Cooling passage 14
A ring 4 is fitted onto the top, and its axial position is fixed by the pin 7 of the ring 4 entering into the cooling passage 14. ring 4
A bandage 11 is applied between the coils 11 to hold the coil 13 stationary within the slot of the rotor. The ring 4 is fixed to the surface of the laminated iron core piece 9 and the coil 3 via an auxiliary bandage 12 fixed in a ring groove 5 of the ring 4.

9 and 10, the rotor of FIGS. 7 and 8 is shown in cross-section with the auxiliary bandage 12 and ring 4 removed after the bandage 11 has hardened.

Bandage 11 is formed as follows.
That is, ring 1 or ring 4 is fitted onto cooling passage 14, and pin 2 or pin 7 enters into cooling passage 14 between the conductors of coil 13 to position ring 1 or ring 4 in the rotor axis direction. . Advantageously, the ring is made of a resilient material, such as aluminum, and consists of at least two segments 1', 1" or 4', 4". The position of the ring is fixed using an auxiliary bandage 12. Advantageously, this auxiliary bandage 12 is made of steel wire. A bandage 11, for example made of a glass fiber tape impregnated with a synthetic resin, is then wrapped over the laminated core piece 9 and the coil 13 and cured. After the bandage 11 has hardened, the auxiliary bandage 12 and ring are removed.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a ring for carrying out the method of the present invention, taken along the - line in FIG. 2, and FIG. 2 shows the ring in FIG. 3 is a sectional view taken along the - line of
FIG. 4 is a cross-sectional view of the second embodiment of the ring taken along the - line in FIG. 6 is a plan view of the ring shown in FIGS. 4 and 5, and FIG. 7 shows a part of the rotor during bandage formation as shown in FIG. 8.
An axial sectional view taken along the line, FIG.
FIG. 9 is an axial sectional view showing a part of the rotor after bandage formation, and FIG. 10 is a sectional view of the rotor shown in FIG. 9 taken along the - line in FIG. FIG. 3 is an axial cross-sectional view showing the structure between the conductors of the coil. 1,4...Ring, 2,7...Pin, 3,5...
...Ring groove, 6...Ring groove, 8...Dovetail fixing part, 9...Laminated core piece, 10...Formed web, 11...Bandage, 12...Auxiliary bandage, 13...Coil, 14... cooling passage.

Claims (1)

[Scope of Claims] 1. A rotor of an electric machine, which also consists of a number of laminated core pieces having an outer diameter of the rotor, with a cooling space maintained between the individual laminated core pieces by formed webs. In a method of forming a bandage for fixing a coil in a slot of a rotor in a structure in which the passages are formed, over each cooling passage 14 one ring 1 each having a width at least corresponding to the cooling passage width is applied. . A method for applying bandages for fixing coils in the slots of a rotor of an electrical machine, characterized in that bandages 11 are applied between the rings using these rings as lateral partitions and then the rings are removed. 2. The method according to claim 1, wherein the rings 1, 4 are constituted by segments 1', 1'', 4', 4''. 3 Connect rings 1 and 4 to layered iron core piece 9 and coil 1
3 or auxiliary bandage 12 on either surface.
The method according to claim 1, wherein the method is fixed by: 4. A rotor of an electric machine, which also consists of a number of laminated core pieces having the outer diameter of the rotor, with cooling passages maintained between the individual laminated core pieces separated by shaped webs. A ring for carrying out a method of forming a bandage for fixing a coil in a slot of a rotor of a structure, comprising at least two rings 1 and 4 fitted onto the cooling passage as partition members for bandage formation. A method for forming a bandage for fixing a coil in a rotor slot, characterized in that pins 2, 7 project radially inwardly from the inner surfaces of these rings 1, 4. Ring for implementation. 5. Claim 4, in which the pin 2 is made integrally with the ring 1 or is mechanically connected to the ring 1.
Ring as described in section. 6. The ring according to claim 5, wherein the pin 7 is coupled to the ring 4 so as to be able to be pushed and displaced in the circumferential direction of the ring 4. 7. The ring according to claim 6, wherein the pin 7 is connected to the ring 4 by a dovetail fixing part 8. 8. Ring according to claim 4, wherein the ring 1, 4 consists of at least two segments 1', 1'', 4', 4''. 9. Ring according to claim 4, in which the rings 1, 4 have one ring groove 3, 5 for the auxiliary bandage 12 on their outer circumferential surface.