JPS58257B2 - Gear winding rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gap winding rotating electrical machine, and particularly to its armature structure.

As a means of increasing the capacity of a single rotating electric machine, the gap winding method, in which the armature coil, which was conventionally placed in the core slot, is placed in the air gap between the stator core and the rotor, is used in superconducting generators, etc. It has come to be adopted by

In this gap winding rotating electric machine, the armature coil is exposed to the air gap, so the armature coil is held between the inner and outer circumferential sides by insulating rings, etc., and supported by support pins, etc. in the circumferential direction. are doing.

In addition, in the gaps between the armature coils, to prevent corona,
It is common practice to pour varnish, fill it and harden it, and then form the armature coil into an integral mold structure.

However, in such an armature coil with an integral mold structure, if a damage accident occurs to one coil, even if you try to remove only the damaged coil, the surrounding normal coils that are hardened together with it will also be damaged. It was extremely difficult to maintain due to cracks, and the entire armature winding had to be replaced in the end, resulting in major maintenance problems.

An object of the present invention is to provide a gap winding rotating electrical machine in which the armature coils can be replaced very easily from the outer circumferential side without damaging the insulation of the surrounding armature coils, while eliminating the drawbacks of the prior art described above. It is in.

In order to achieve this object, the present invention arranges a first release material having a U-shaped cross section around the lower coil so that its open end is in contact with the inner peripheral surface of the outer cylindrical insulator, and , characterized in that a second release material having a U-shaped cross section is arranged around the upper coil and the first release material such that its open end is in contact with the inner peripheral surface of the outer cylindrical insulator. .

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG.

The armature coil 1 consists of an upper coil 1a and a lower coil 1b, and is arranged in an air gap between the stator core 2 and the rotor 3.

The armature coil 1 is supported by an insulating ring 4 on the inner circumference side and a cylindrical insulator 5 on the outer circumference side, and is supported in the circumferential direction via support pins 6, and in the gaps between each coil. The varnish 7 is filled and hardened.

The above configuration is the same as the conventional one, but in this embodiment, a release material 8 having approximately the same length as the insulating ring 4 and the cylindrical insulator 5 is arranged around the upper coil 1a and the lower coil 1b, respectively. There is.

This release material 8 is made of, for example, Teflon, Pyrene, Kapton, Lumirror tape, etc., and both ends thereof extend in the outer radial direction to a position in contact with the inner peripheral surface of the cylindrical insulator 5.

In the armature configured in this way, the varnish 7 and the release material 8 do not adhere to each other, and each coil 1a, 1b is separably separated from each other by the release material 8, so an abnormality was observed in the coil. Sometimes the armature coil 1 integrated with varnish 7
, an insulating ring 4, a cylindrical insulator 5 and a support pin 6
By pulling out the coil from inside the stator core 2 in the axial direction and cutting and removing the cylindrical insulator 5 on the outer circumferential side, it is possible to remove the coils one by one by lifting the coils in the outer radial direction. The coil can be replaced very easily from the outer periphery side where the work space is wide, without causing damage such as cracks to the coil.

As explained above, according to the present invention, the first release material having a U-shaped cross section is arranged around the lower coil so that its open end is in contact with the inner peripheral surface of the outer cylindrical insulator. With,
A second layer having a U-shaped cross section is formed around the upper coil and the first release material.
The release material is arranged so that its open end is in contact with the inner peripheral surface of the outer cylindrical insulator, and each coil is separably divided and can be taken out in the outer radial direction, making it easy to replace the coils. without damaging the surrounding coils.
This can be done very easily from the outer periphery where the work space is wider.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a gap winding rotating electric machine showing one embodiment of the present invention, and FIG. 2 is a longitudinal sectional front view of the same. 1...Armature coil, 1a...Upper coil, 1b...Lower coil, 2...Stator core, 3...Rotation 4... Insulation ring (inner cylindrical insulator), 5... Cylindrical insulator (outer cylindrical insulator), 7... Varnish layer , 8・
...Release material (first and second release materials).

Claims (1)

[Claims] 1 A rotor, a stator core, an armature coil consisting of an upper coil and a lower coil disposed in the gap between these, and armature coils disposed on the inner and outer circumferential sides of this armature coil, respectively. an inner circumferential side and an outer circumferential side cylindrical insulator that support the stator side, the inner circumferential side cylindrical insulator,
A varnish is filled between the outer circumferential insulator and the armature coil, and these are cured together, and a first release material having a U-shaped cross section is placed around the lower coil, and the open end thereof is A second release material having a U-shaped cross section is disposed so as to be in contact with the inner peripheral surface of the outer cylindrical insulator, and a second release material having a U-shaped cross section is placed around the upper coil and the first release material. A gap winding rotating electrical machine characterized by being arranged so as to be in contact with the inner peripheral surface of a cylindrical insulator.