JPS5953060A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To enhance the cooling effect of a rotary electric machine and to reduced and manufacturing cost of the machine by inclining the cooling air hole of a conductor for a rotor coil to the conductor surface, and punching it to cross from the front and back surfaces. CONSTITUTION:When a cooling air hole 3 is formed by punching at a conductor 1a for a coil, the conductor 1a is inclined and disposed by a punch and a die, and the first passing direction 8a of the punch is inclined and punched longitudinally of the hole 3 on the surface of the conductor 1a. Then, the second passing direction 8b of the punch is inclined to the longitudinal direction of the hole 3 at the back surface of the conductor 1a, and the first and second passing directions 8a, 8b of the punch are crossed at the intermediate of the length of the conductor 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rotating electric machine with improved ventilation holes for cooling a rotor coil.

[Technical background of the invention and its problems 1 Rotating electric machines that have a rotor coil with multiple turns on the rotor generally have a rotor coil with a plurality of turns by better cooling the conductor forming each turn of the rotor coil. 1 scoop, flow [l-
I'm trying to output 4H+ to the tercoil with i'+:F L/1, l. Therefore, in order to cool the body, a cooling medium (ii+1) is provided that passes through the stacking direction of each turn conductor of the rotor coil, and a cooling medium such as air or hydrogen is allowed to flow into the 111j air hole (O'1). There is.

FIG. 1 is a perspective view showing a main part of a rotor coil and its surrounding paulownia, which is common to all embodiments of the present invention. ( ) is the rotor coil, and each turn conductor (
Ja) and (Ia) are insulated by an interlayer insulator (2), and cooling holes (3) are provided in the stacking direction of each turn conductor (1a).
) is set as [+Ti, and the upper part is held down by 4 Schiff (4).

Then, the cooling air that has passed through the axial ventilation groove (5) of the rotor core (not shown) provided below the rotor coil (1) is directed through the cooling vent J as shown by the arrow (6). jl hole (3
) and is discharged to the outside from an exhaust hole (4a) provided in the wedge (4). In addition, (7) is shown in the diagram.
It is a slot insulator that insulates the rotor coil (1) from the nested core.

The above-mentioned cooling hole (3) has a large ventilation area and is 1j
7 (i, t, the current density of the rotor coil in the part where the hole (3) is provided is large / 3) has conventionally been manufactured by punching using a punch and die in the shape shown in 2IyI(a), (h), and (c).In other words, iTl' 2(a) As shown, the passing direction (8) of the punch is perpendicular to the surface of the conductor (1a), and the manufacturing cost of punching the hole (3) is 1).
), but as shown in Figure 2 (c), a sag (9) occurs on the back side, and this sag (9) significantly reduces the electrical insulation performance between turns, so it is necessary to remove the sag (!). However, the disadvantage is that the cost is high.

1. OBJECTS OF THE INVENTION It is an object of the present invention to provide a rotating IF1i electric machine in which the cooling ventilation holes of the rotor coil can be manufactured at low cost, and at the same time, the cooling effect can be increased.

Invention of invention! '1. Required: 1 In the present invention, the rotor coil is used for cooling the city body)
1) By punching out 1 air hole at an angle to the surface of the body and intersecting from the front and back surfaces, the sag is located between the ventilation holes 1. The cross section is designed to be harmless to insulation, and the intersecting portion has a fin shape to increase the cooling effect.

[Embodiments of the invention]

Figure 3 shows an embodiment of the present invention.
hl.

This will be explained with reference to (c). Furthermore, layer 1 of the rotor coil
41 of the department and its surroundings! 'jThe general structure is as shown in FIG. 1 described above, so please refer to this as well.

As shown in Fig. 3 (1), when manufacturing the cooling ventilation holes (3) in the coil rod (1a) by punching, the conductor (1a)
are arranged at an angle to the punch and die, and the first passage of the punch;
a) Punch out the ventilation hole (3) on the surface thereof at an angle with respect to the longitudinal direction of the hole (3).

Next, punch the conductor (1a) in the second passing direction (81) from the bottom of the figure, obliquely to the longitudinal direction of the ventilation hole (3), until the thickness of the conductor (1, +1) 1st part of the punch in the middle part of the. Cross the second passing direction (8R) and (8h).

Next, I will explain the effect.

The pun (9) is i゛fr 3.
As shown in Figure (c), the rod opening 11) is located at the middle part of the thickness.
Ii′, 1, the finishing work ``t'' of the punching 78 is not required, and the drilling cost is reduced.And the fp of the punch,
1. Second passing direction (8:+).

(R+)) is where the fin (lt+) intersects.
Cooling effect during ventilation is done in direction 1.

Next, another embodiment will be described with reference to FIGS. 4(R) and 4(h). This is the first and second passing direction of the punch (
8J, ((3h) ノ 1η, ° Pa・) Cut in the width direction of the hole (3) and punch it out at an angle so that it intersects from the front and back sides of the jjt body (1a). It is something that

In this case, l'lj 7AE of the side part of the ventilation hole (3)
Although the density is slightly larger than the embodiments shown in FIGS. 3(a), (h), and (c), the temperature of the rotor coil fl) is lower than that of the third embodiment because the cooling effect by the fins (Ill) is increased.
It tends to be lower than the examples shown in Figure 8), (b), and (c). Other effects are (3 < 3 Figure (rl
l, (+)l, (Similar to the embodiment shown in cl).

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with various modifications without changing the gist thereof.

[Effect of light and light]

As explained below, according to the present invention, the cooling effect of the rotor coil cooling holes 11 and 11 is modified, and
It becomes possible to provide a 1.1 rotation type 1' function at a low cost.

[Brief explanation of the drawing]

Fig. 1 shows an example of the present invention;
Q. Figure 2 is a perspective view showing the schematic structure of the W part of the 1-turcoil and its surroundings in a rotating electric machine (aL (+
)L (C) shows the conventional glue-turcoil river ventilation hole, and (,) shows the cross section iMi along the A-A line in Figure 61'J1.
Figure, (1) is a side view of (X+), (c) b:c (
Enlarged view of the main part of a), Figure 11S3 (a), (11),
(C) shows the 11υ air hole part for the rotor coil of one embodiment of the rotating electrical machine by Gomei Kiu, (,) is the arrow IIjr curve diagram along the line 8-A in Fig. h) is a top view of (a), (c) is an enlarged view of the main part of (a), and FIG. 4 (a). (1)) does not show other embodiments and depicts the ventilation hole 11ii +/
FIG. 1 1... Rotor coil 1a... 41 turns 3.
...Ventilation hole 8a...First J1'II passing direction of punch 81)...Second pass of punch) ire direction 9...
・Drawing part 10...intersection Finn agent Patent attorney I -ni -man Figure 1 Figure 2 Figure 3 (C/) Figure 4 (a) (b)

Claims (1)

[Claims] Rotating part in which a rotor coil wound with multiple turns is provided with 11 cooling ventilation holes in the stacking direction of each turn conductor: In a machine, the cooling ventilation holes in the ring body are inclined with respect to the conductor surface. A rotating electric machine characterized by being formed by punching out crosswise from the front and back sides.