JPS6055830A - Supporting device of field coil of salient-pole rotor - Google Patents

Abstract

PURPOSE:To prevent an isolating space from dropping by providing a chevron- shaped groove to become a radial vertex at the axial center on the bonding surface of the spacer of a coil supporting plate. CONSTITUTION:A field pole 1 of a salient-pole rotor has a field core 2, and a field coil 4 mounted through an insulating collar 3 on the core 2, and pole pieces 5 are provided on the core 2. A coil supporting plate 7 and an isolating spacer 8 impregnated with adhesive are provided between the coils 4 of the poles 1 arranged at the prescribed interval on an annular yoke 6 in the circumferential direction, and a chevron-shaped groove 9 to become a radial vertex is provided at the axial center on the bonding surface of the spacer 8 to the plate 7. Thus, the spacer 8 is engaged with the plate 7 in the groove 9, thereby preventing the spacer 8 from dropping.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a support device for a field coil of a convex pole rotor.

[Background of the invention]

It is a convex pole rotor that is equipped with an annular yoke attached to a rotating shaft, a field core fixed at a predetermined interval in the circumferential direction of the yoke, and a field coil installed in the field core.
The field coil is made by winding a bare conductor in a flat manner, and inserting an interlayer insulator, generally made of side-heat insulating paper or the like impregnated with adhesive, between adjacent turns. It was made.

A field coil integrally molded in this way does not cause deformation in the rotating part of the bare conductor under normal operation or under stress conditions, but it does not cause deformation in the rotating part of the bare conductor during normal operation or under stress conditions. Field coils are deformed because the stress exceeds the allowable value for bare conductors, and they also become millet-shaped due to excessive heating and cooling cycles such as repeated operation and shutdown.

In other words, the field coil slides due to thermal expansion and contraction VC due to resistance thermal changes due to the magnitude of load current of the bare conductor during cooling and heating cycles. The rotation part moves slightly in the axial direction or circumferential direction,
A relative father form is produced while being restrained by centrifugal force and sliding resistance. -1: In the 11th series of high-speed rotation, the bare conductor bends due to centrifugal force, and the force is exerted, but this means that the winding part of the bare conductor is separated from the field iron. It appears in the form of movement in the circumferential direction. If the hairstyle of the winding portion of such a bare wire exceeds the limit, it may damage the insulation layer 1b of the field coil or cause plastic deformation of the bare conductor, causing an interlayer short circuit or increased vibration of the equipment.

For this reason, conventionally, coil support and gold were placed between the field coils.
In order to prevent deformation of the field coil, a spacer made of non-woven fabric impregnated with an adhesive is completely inserted into the indefinite space between the coil support plate and the field coil. Note that the spacer was impregnated after insertion to allow the necessary adhesive to harden. However, with such a support device for the field coil, the dimensions of the field coil are not sufficient.
Differences tend to occur in the shape of each field pole when assembled to a rotor or when assembled to a rotor.
Although all the spacers were inserted, the spacer fell off due to wear and tear during long-term operation. ^iF If the Nubeza falls off, excessive stress will be generated in the field coil, which will promote permanent deformation of the field coil.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to provide a support device for a field coil of a convex pole rotor that can prevent the spacer from falling off.

[Summary of the invention]

That is, the present invention includes a coil support plate disposed between the field coils of a convex pole rotor, and a spacer disposed between the coil support plate and the field coil and made of an adhesive-impregnated nonwoven fabric. In the support device for the field coil of the convex pole rotor, the coil support plate has a bonding surface with the spacer,
The spacer is characterized by having a mountain-shaped groove that reaches its apex in the radial direction at the center in the axial direction. Become.

[Embodiments of the invention]

The present invention will be explained below based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 1-5.

As shown in the figure, the field pole l of the convex pole rotor is connected to the field coil 4 (II The field core 2 is provided with magnetic pole pieces 5 that prevent the field coil 4 from protruding.Structured in this way, the field pole pieces 1 are arranged at predetermined intervals in the circumferential direction of the annular yoke 6. A coil support plate 7 and an adhesive-impregnated spacer 8 are provided between the field coils 4 to prevent deformation of the field coil 4. In this embodiment, the coil support plate 7 is A mountain-shaped groove 9 having a peak in the radial direction at the center in the axial direction is provided on the joint surface with the separation spacer 8. By doing so, the separation spacer 8 can connect the coil support plate 7 with this mountain-shaped groove 9. It is possible to obtain a supporting device for the field coil 4 of the convex pole rotor, which can be fully locked to prevent the spacer 8 from falling off.

That is, the mountain-shaped grooves 9 are provided on the joint surface of the coil support plate 7 with the dust amount spacer 8 as described above, but these are formed by providing grooves 9a and 9bi that are inclined from the axial end of the coil support plate 7, respectively. and abutted against each other so that the apex in the radial direction was at the axial center portion which was the abutted portion. After the coil support plate 7 provided with the mountain-shaped groove 9 and the separation spacer 8 are installed between the field coils 4 in this way, the adhesive impregnated into the separation spacer 8 is cured. Insert the tightening bolt 12' through the washer 11 into the tightening hole IO provided in the plate 7! r and tighten the coil support plate 7. In this way, the spacer 8, that is, the non-woven fabric impregnated with adhesive, is compressed and hardened so that it is well filled between the field coil 4 and the coil support plate 7, and the coil support plate A chevron-shaped protrusion 8a that is engaged with the chevron-shaped groove 9 is formed in a portion facing the chevron-shaped groove 9 of No.7. The chevron shape cB4'lj provided on this coil support plate 7: Since it is diagonally inclined in the direction in which centrifugal force acts, the dust amount spacer 8 also has a protrusion with an oblique angle θ in the same direction as the direction in which centrifugal force acts. The centrifugal force exerted on the spacer 8 is concentrated at the center of the mountain-shaped protrusion 8a, and as shown by the dotted line σ11 in the figure, the /f mint is [
0, and the centrifugal force meter can prevent the spacer 8 from falling off due to drying 7L of the spacer 8.
Long-term deformation of the field coil 4 can be prevented.

The nonwoven fabric used for the spacer 8 is a high-density and strong polyester nonwoven fabric (for example, made by Nippon Vilene).
However, as the adhesive, room temperature curing polyester adhesive TI is used, heat curing epoxy adhesive or other solvent-free adhesive is used, and as the coil support plate 7, an epoxy glass laminate is used. Ru.

〔Effect of the invention〕

As described above, the present invention is a convex pole rotor in which the separation spacer is locked to the coil support plate, thereby preventing the separation spacer from falling off. A support device for a magnetic coil can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of field poles supported by a support device of an embodiment of the support device for field coils of a convex pole rotor of the present invention, and FIG. 2 is a plan view of field poles supported by a support device of the same embodiment. , N3 is a perspective view of a coil support plate according to an embodiment, and FIG. 4 is a front view of a coil support plate according to an embodiment as well as N1. FIG. 5 is a perspective view showing a state of connection with a spacer, and FIG. 5 is a perspective view of a spacer according to an embodiment. l... Field pole, 2... Field iron core, 4... Field coil, 7... Coil support plate, 8... Separation spacer, 8
a... Protrusion, 9... Mountain-shaped groove, 9a, 9b...
・Mountain-shaped men gold invitation 2 Kasumi/8/2//

Claims (1)

[Claims] 1. A coil support plate disposed between the field coils of the convex pole rotor, and a spacer disposed between the coil support plate and the field coil and made of an adhesive-impregnated nonwoven fabric. In a support device for a field coil of a convex pole rotor,
on the joint surface of the coil support plate with the separation spacer,
A support device for a field coil of a convex pole rotor, characterized in that a mountain-shaped groove having a peak in the radial direction is provided at the center in the axial direction.