JPS6011727Y2 - rotor of rotating electric machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotor for a rotating electric machine having a body portion formed in a block like the rotor of a turbine generator.

Conventionally known structures of this type are shown in FIGS. 1, 2, 3, 4, and 5.

1, 2, 3, and 4, 1 is a rotor shaft, 2 is a coil slot provided in the body of the rotor shaft 1 in the axial direction, and 3 is a coil slot in this coil slot 2. This is the inserted rotor coil, and 3' is the coil end portion.

4 is an insulating spacing piece at the coil end 3' portion, and 5 is a retaining ring formed into a cylindrical shape with an insulator 6 interposed therebetween to hold the coil end 3' and the insulating spacing piece 4 against centrifugal force.

7 is a slot cell that insulates the rotor coil 3 and rotor shaft 1 within the coil slot 2; 8 is a ventilation groove provided in the axial direction at the bottom of the coil slot; 9 is a slot cell that insulates the rotor coil 3 and the rotor shaft 1 within the coil slot 2; This is a partition plate installed at the boundary between the

10 is a wedge that holds the rotor coil 3 against centrifugal force.

Next, to explain the structure, the rotor coil 3 is inserted into the coil slot 2, and in order to drive the wedge 10, the rotor coil 3 is naturally pressed toward the bottom of the coil slot 2. In this case, the bottom of the slot self A partition plate 9 is provided at the boundary between the slot self and the ventilation groove 8 in order to protect the slot self.

As shown in FIG. 4, this partition plate 9 has convex shapes at both ends to prevent it from moving in the axial direction.

However, in order to insert the retaining ring at the rotor coil end, the rotor coil end is made into a vertical shape, but a huge force is applied to the partition plate at the slot outlet of the coil end and the end of the slot cell, causing the partition to collapse. This had serious drawbacks, such as the portion of the plate corresponding to the convex portion bending, causing deformation of the slot cell, and eventually leading to dielectric breakdown.

Furthermore, it was necessary to increase the thickness of the partition plate, and valuable slot space was wasted.

This invention was made to eliminate such conventional drawbacks, and by providing a stepped portion at the end of the rotor body to receive the convex portion of the partition plate, the end portion of the partition plate is supported. The present invention provides a rotor for a rotating electrical machine that includes a partition plate that is stronger in terms of strength.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 6 and 7, reference numeral 11 indicates a stepped portion provided at the end of the body of the rotor shaft at a boundary line between the carp storage portion of the slot and the ventilation groove, that is, a diameter corresponding to the inner diameter side of the partition plate. It is.

Note that the other configurations are the same as those of the prior art, so explanations will be omitted.

As described above, this invention supports the partition plate provided at the boundary between the coil housing portion of the slot and the ventilation groove at the end of the rotor body, at the end of the body of the rotor shaft, that is, at the end of the slot. This is effectively achieved by providing a stepped portion with a diameter corresponding to the inner diameter (ml) of the partition plate.

As described above, according to this invention, the end of the partition plate at the bottom of the coil in the rotor slot is supported by the step of the shaft, so the partition plate does not deform during coil shaping, and the strength is increased. Therefore, the thickness of the partition plate can be reduced to a minimum thickness, and the efficiency of storing conductors in the slots is improved, making it possible to obtain an extremely advantageous rotor for a rotating electric machine.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional rotor structure, and Figure 2 is a cross-sectional view of a conventional rotor structure.
3 is a cross-sectional view of the slot along the line ■-■ in FIG. 2, FIG. 4 is a sketch of the partition plate 9, and FIG. 5 is a perspective view showing the inserted state of the partition plate, FIG. 6 is a sectional view showing a rotor structure according to an embodiment of the present invention, and FIG. 7 is a perspective view showing one end of the rotor shaft. 1 is a rotor shaft, 2 is a coil slot, 3 is a rotor coil, 3' is a coil end part, 4 is an insulation spacing piece, 5 is a retaining ring, 6 is an insulation, 7 is a slot cell, 8 is a ventilation groove, 9 1 is a partition plate, 1o is a wedge, and 11 is a stepped portion. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a rotor equipped with ventilation holes at the bottom of longitudinal coil slots arranged at predetermined intervals in the circumferential direction of the rotor, a partition plate is arranged at the boundary between the coil storage part in the slot and the ventilation groove. At the end of the rotor body where the coil slots are provided, that is, at the end of the slot, a paragraph is provided at a portion corresponding to the boundary line between the coil housing portion in the slot and the ventilation groove, and the partition plate is A rotor for a rotating electric machine, characterized in that the end portion is received.