JP2002118998A - Rotor of rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the rotor of a rotating electric machine, which does not cause shifting or fall of an insulating block 1 accompanying the deterioration due to aging at insertion of the insulating block 1 for insulation between stator coils set in the rotor of itself or for restricting thermal elongation at operation or motion by centrifugal force, and does not need complicated process when inserting of the insulating block 1. SOLUTION: To perform insulation and fixation of the coil end part of the rotor of a rotating-electric machine, the mutual end parts of the rotor coil 4 are provided with grooves 7 in the axial direction of the rotor, and an insulating piece 8 is engaged with these grooves 7 with it crossing the area between coils, and a portal insulating block 1 is set to this insulating piece 8. Then, a retaining ring 4 is shrink-fitted via an insulating ring 5 under the retaining ring from the outside periphery side of this portal insulating block 1 and the rotor coil 4 at the end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a rotating electric machine in which an insulating block is inserted between rotor coils at an end portion of the rotor of the rotating electric machine.

[0002]

2. Description of the Related Art An insulating block is inserted between rotor coils at an end portion of a rotor of a rotating electric machine to maintain an appropriate interval. This is for restricting insulation between rotor coils and movement due to thermal expansion and centrifugal force during operation.

FIG. 17 is an explanatory diagram of the insulating block 1 inserted between the rotor coils. The insulating blocks 1 are connected by insulating rods 2, and two or three insulating blocks 1 connected by the insulating rods 2 rotate the rotor coils 4 after twisting the insulating rods 2.
Inserted between. Thereby, the contact surface between the rotor coil and the insulating block 1 is widened, and the movement of the insulating block 1 is prevented by the spring effect of the insulating rod 2 and the contact surface pressure of the insulating block 1. Further, in order to prevent a gap between the insulating block 1 and the rotor shaft as a fall prevention, the insulating block 1 is used.
A pin is provided at the bottom of the inner diameter of the inner surface, and the insulating block itself has a long structure.

[0004]

However, when such an insulating block 1 is used, fluctuations in the spacing between the rotor coils and the insulation rod 2 due to vibration, heat, aging, etc., associated with the operation of the rotating electric machine, etc. In some cases, the insulating block 1 may move or drop due to a decrease in the spring effect, peeling of the bonded portion between the insulating block 1 and the insulating rod 2, breakage of the insulating rod 2 due to deterioration, and the like.

Further, the assembly of the insulating block 1 and the insulating rod 2 is complicated because the assembly is performed by twisting the insulating blocks 1 with each other. In addition, there is a possibility that the insulating bar 2 may be damaged because the insulating block 1 is inserted while being twisted when incorporated into the rotor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotor for a rotating electrical machine that does not move and drop the insulating block due to aging and does not require complicated steps when inserting the insulating block.

[0007]

According to a first aspect of the present invention, there is provided a rotor for a rotating electrical machine, comprising: a rotor axial groove provided between rotor coils at an end portion of the rotor of the rotating electrical machine;
An insulating piece fitted into the grooves and passed between the rotor coils; an insulating block having a gate-shaped shape fitted with the insulating piece and inserted between the rotor coils; A holding ring for holding an end portion of the rotor coil from an outer peripheral side of the rotor coil via an insulating ring below the holding ring.

In the rotor of the rotary electric machine according to the first aspect of the present invention, a gate-shaped insulating piece bridged over a groove in the rotor axial direction provided between the rotor coils at the end of the rotor of the rotary electric machine. By fitting the insulating block between the rotor coils having the shape, the insulating block is prevented from moving and falling.

According to a second aspect of the present invention, there is provided a rotor for a rotary electric machine, wherein a rotor axial groove provided in a rotor coil at an end portion of the rotor of the rotary electric machine is fitted into the groove, and the rotor coil is fitted into the groove. An insulating block inserted between each other, and a holding ring for holding an end portion of the rotor coil from an outer peripheral side of the insulating block and the rotor coil via a holding ring lower insulating ring. .

[0010] In the rotor of the rotating electric machine according to the second aspect of the present invention, an insulating block between the rotor coils is fitted into a groove in the rotor axial direction provided on the rotor coil at an end portion of the rotor of the rotating electric machine. The combination prevents the insulating block from moving and falling.

According to a third aspect of the present invention, there is provided a rotor for a rotating electric machine, wherein a groove in a rotor radial direction provided in a rotor coil at an end portion of the rotor of the rotating electric machine, and a gate-shaped shape fitted to the groove. And an insulating block inserted between the rotor coils, and a retaining ring that holds an end portion of the rotor coil via an insulating ring below the retaining ring from an outer peripheral side of the insulating block and the rotor coil. It is characterized by having.

According to a third aspect of the present invention, there is provided a rotor for a rotating electric machine, wherein a rotor-shaped groove is provided in a rotor radial direction groove provided in a rotor coil at an end portion of the rotor of the rotating electric machine. By fitting the insulating block between the coils, the insulating block is prevented from moving and falling.

According to a fourth aspect of the present invention, there is provided a rotor for a rotary electric machine having a groove in an axial direction of a rotor provided in a rotor coil at an end portion of the rotor of the rotary electric machine, and a projection fitted with the groove. An insulating block fitted between the protrusions and the groove and inserted between the rotor coils; and an end portion of the rotor coil from an outer peripheral side of the insulating block and the rotor coil via a holding ring lower insulating ring. And a retaining ring for retaining

According to a fourth aspect of the present invention, in the rotor of the rotating electric machine, the protrusion of the insulating block between the rotors is formed in a groove in the rotor axial direction provided in the rotor coil at the end of the rotor of the rotating electric machine. Is fitted to prevent the insulating block from moving and falling.

According to a fifth aspect of the present invention, there is provided a rotor for a rotating electrical machine, wherein a groove in an axial direction of the rotor provided in a rotor coil at an end portion of the rotor of the rotating electrical machine is fitted to the groove. An insulating piece passed between rotor coils, an insulating block fitted between the insulating pieces and inserted between the rotor coils, and a retaining ring lower insulating ring from the outer peripheral side of the insulating block and the rotor coil. And a holding ring for holding an end portion of the rotor coil through the holding ring.

In the rotor of the rotating electric machine according to the fifth aspect of the present invention, the insulating piece is bridged between grooves in the rotor axial direction provided in the rotor coil at the end portion of the rotor of the rotating electric machine. The difference in fitting the insulating block between the insulating pieces prevents the insulating block from moving and falling.

According to a sixth aspect of the present invention, there is provided a rotor for a rotary electric machine, wherein a drill hole provided in an inner diameter side of a rotor coil at an end portion of the rotor of the rotary electric machine in a radial direction of the rotor is fitted with the drill hole. An L-shaped insulator having a drilled hole to be fitted with the insulation pin, fitted with the drilled hole and the insulation pin, and attached to the inner diameter side of the rotor coil; and A groove for fitting the groove and the groove
An insulating block fitted with a letter-shaped insulator and inserted between the rotor coils, and an end portion of the rotor coil from an outer peripheral side of the insulating block and the rotor coil via a holding ring lower insulating ring. And a holding ring for holding.

In the rotor of the rotating electric machine according to the invention of claim 6, the rotor coil and the insulating block at the end portion of the rotor of the rotating electric machine are connected to each other by an L-shaped insulator, so that the insulating block is formed. Prevents movement and falling.

[0019]

Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram of an end portion of a rotor of a rotating electric machine according to an embodiment of the present invention, and FIG. 1A is a cross-sectional view of a coil end portion of the rotating electric machine rotor showing an attached state of an insulating block. FIG. 1B is a perspective view showing a first embodiment of a coil end portion of a rotor of a rotary electric machine.

In FIG. 1, a rotor core 3 formed integrally with a shaft is provided with a plurality of slots in the direction of the rotation axis. Normally, the coil center portions of the plurality of rotor coils 4 are respectively insulated in the slots. It is stored through an object. Then, a plurality of rotor coils 4 are fixed and insulated from each other by driving a slot wedge into the slot entrance. As described above, in the coil center portion at the center of the rotor core 3, the plurality of rotor coils 4 in the same slot are insulated through the insulator.

On the other hand, the end of the coil center, that is, the coil end, which is the end of the rotor coil 4, is exposed from a slot provided in the rotor core 3. For this reason,
Since the rotor rotates with the operation of the rotating electric machine, the rotor cannot be restricted in the radial direction unlike the coil center portion fixed to the wedge provided at the slot entrance. Therefore, the insulating block 1 is provided between the rotor coils 4, and the end portion of the rotor coil is held by the holding ring 6 from the outer peripheral side of the insulating block 1 and the rotor coil 4 via the holding ring lower insulating ring 5. . That is, the annular holding ring 6 is shrink-fitted to the coil end portion.

In FIG. 1 (b), when insulating and fixing the coil end portion of the rotor of the rotary electric machine, a groove 7 in the rotor axial direction provided between the end portions of the rotor coil 4 is provided. The insulating pieces 8 are fitted into the grooves 7 so as to pass between the coils, and the gate-shaped insulating block 1 is fitted into the insulating pieces 8. Then, the retaining ring 4 is shrink-fitted from the outer peripheral side of the gate-shaped insulating block 1 and the rotor coil 4 at the end via the retaining ring lower insulating ring 5.

Therefore, since the insulating block 1 is held by the insulating piece 8, the insulating block 1 can be prevented from moving or falling.
Further, the insulating block 1 can be easily attached because the insulating block 1 does not need to be twisted.

FIG. 2 is a plan view showing a second embodiment of the coil end portion of the rotor of the rotary electric machine, as viewed from the direction of arrow A in FIG. In the second embodiment, a groove 7 is provided at the end of the rotor coil 4 in the axial direction of the rotor.
The insulating block 1 is fitted into the groove 7, and the insulating block 1 is inserted between the rotor coils 4. Then, the holding ring 4 is shrink-fitted from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end portion via the holding ring lower insulating ring 5.

FIG. 3 is a perspective view showing a third embodiment of the coil end portion of the rotor of the rotary electric machine. In the third embodiment, a groove 7 in the rotor radial direction is provided at the end of the rotor coil 4, and the groove 7 and the insulating block 1 having a gate shape are fitted. That is, the rotor block 4 is straddled by the groove 7 and the insulating block 1 is inserted between the rotor coils 4. Then, the retaining ring 4 is shrink-fitted from the outer peripheral side of the gate-shaped insulating block 1 and the rotor coil 4 at the end portion via the retaining ring lower insulating ring 5.

FIG. 4 is a plan view showing a fourth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a view as seen from the direction of arrow A in FIG. In the fourth embodiment, a groove 7 is provided at the end of the rotor coil 4 in the rotor axial direction.
The protrusion 9 of the insulating block 1 is fitted into the groove 7.
Then, from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end part, the holding ring 4
Shrink fit.

FIG. 5 is a plan view showing a fifth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a view as seen from the direction of arrow A in FIG. In the fifth embodiment, grooves 7 are provided in the axial direction of the rotor at the ends of the rotor coil 4 and insulating pieces 8 are fitted to each other in the grooves 7. That is,
An insulating piece 8 is put over the groove 7 of the rotor coil 4. Then, the insulating block 1 is fitted between the insulating pieces 8 and the insulating block 1 is inserted between the rotor coils 1. Thereafter, the retaining ring 4 is shrink-fitted from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end portion via the retaining ring lower insulating ring 5.

FIG. 6 is a side view showing a sixth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the sixth embodiment, the rotor coil 4
A drill hole 10 is provided in the radial direction of the rotor on the inner diameter side of the end portion, and the drill hole 10 and the insulating pin 11 are fitted. The insulating pin 11 and the L-shaped insulator 12 are fitted.
The insulating block 1 is fitted to the letter-shaped insulator 12. Then, the holding ring 4 is shrink-fitted from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end portion via the holding ring lower insulating ring 5.

FIG. 7 is a plan view showing a seventh embodiment of the coil end portion of the rotor of the rotary electric machine, and is a view as seen from the direction of arrow A in FIG. In the seventh embodiment, a groove 7 is provided at the end of the rotor coil 4 in the axial direction of the rotor.
An insulating pin 11 is fitted into the groove 7 and the insulating pin 1
1 and the insulating block 1 are fitted together. Then, the holding ring 4 is shrink-fitted from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end portion via the holding ring lower insulating ring 5.

FIG. 8 is a plan view showing an eighth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a view as seen from the direction of arrow A in FIG. In the eighth embodiment, FIG.
In addition to the seventh embodiment, the insulating pins 11 also fix the insulating rods 2 connecting the insulating blocks 1 to each other.

FIG. 9 is a side view showing a ninth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the ninth embodiment, the rotor coil 4
The innermost rotor coil 4a of the end portion is wider than the other outermost rotor coil 4b.
Is provided with a notch 1a, and this widened rotor coil 4
a and the notch 1a of the insulating block 1 are fitted. Then, the holding ring 4 is shrink-fitted from the outer peripheral side of the insulating block 1 and the rotor coil 4 at the end portion via the holding ring lower insulating ring 5.

FIG. 10 is a plan view showing a coil end portion of a rotor of a rotary electric machine according to a tenth embodiment, as viewed from the direction of arrow A in FIG. In the tenth embodiment, the insulating rods 2 connecting the insulating blocks 1 inserted between the rotor coils 4 at the end portions of the rotor coils 4 are elongated in the circumferential direction of the rotor to make contact with the rotor coils 4. Let it. In other words, the insulating rods 2 connecting the insulating blocks 1 inserted between the rotor coils 4 at the end portions of the rotor coils 4 are long in the circumferential direction of the rotor and come into contact with the rotor coils 4. .

FIG. 11 is a side view showing an eleventh embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the eleventh embodiment, the insulating block 1 inserted between the rotor coils 4 at the end of the rotor coil 4 is supported by the block lower insulating ring 13 below the insulating block 1 from the inner diameter side. This block lower insulating ring 13 is fixed by the insulating block 1 and the insulating pin 11,
Further, the block lower insulating ring 13 is provided with a ventilation hole (not shown) for ventilation.

FIG. 12 is a side view showing a twelfth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the twelfth embodiment, the insulating block 1 inserted between the rotor coils 4 at the end portion of the rotor coil 4 is connected to the insulating ring 5 on the outer diameter side and the insulating pin 5.
Fix at 1.

FIG. 13 is a side view showing a thirteenth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the thirteenth embodiment, the insulating rods 2 connecting the insulating blocks 1 inserted between the rotor coils 4 at the end portions of the rotor coils 4 are bound by glass fibers 14 bonded to the holding ring lower insulating ring 5. .

FIG. 14 is a side view showing a fourteenth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the fourteenth embodiment, the insulating block 1 is bound by the glass fiber 14 adhered to the insulating ring 5 below the holding ring.

FIG. 15 is a side view showing a fifteenth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the fifteenth embodiment, the glass fiber 14 is bonded to the rotor coil 4.

FIG. 16 is a side view showing a sixteenth embodiment of the coil end portion of the rotor of the rotary electric machine, and is a detailed view of a portion B in FIG. In the sixteenth embodiment, the insulating rods 2 connecting the insulating blocks 1 inserted between the rotor coils 4 at the end portions of the rotor coils 4 are connected to the insulating blocks 1.
Is supported by an elastic insulator 15 inserted from the inner diameter side of the above.

According to the embodiment of the present invention, the insulation and fixing between the rotor coils 4 at the end portions can be properly performed, so that the insulating block 1 can be prevented from falling and moving.
In addition, when the insulating block 1 is mounted, it is not necessary to apply a twist between the adjacent rotor coils 4, so that complicated steps are eliminated.

[0040]

As described above, according to the present invention, assembling errors of the insulating block are small, and it is not necessary to apply a twist when mounting the insulating block. And movement can be prevented. Therefore, it is possible to obtain a rotor of the rotating electric machine having soundness capable of preventing the insulating block from falling and moving due to vibration or aging deterioration during operation of the rotating electric machine.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an end portion of a rotor of a rotary electric machine according to an embodiment of the present invention, and FIG. 1A is a cross-sectional view of a coil end portion of the rotor of the rotary electric machine showing a mounted state of an insulating block. FIG. 1B is a perspective view showing a first embodiment of a coil end portion of a rotor of the rotary electric machine.

FIG. 2 is a plan view showing a second example of the coil end portion of the rotor of the rotating electric machine according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a third example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention.

FIG. 4 is a plan view showing a fourth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
The arrow view seen from the arrow A direction of FIG.

FIG. 5 is a plan view showing a fifth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
The arrow view seen from the arrow A direction of FIG.

FIG. 6 is a side view showing a sixth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
FIG. 2 is a detailed view of a portion B in FIG. 1.

FIG. 7 is a plan view showing a seventh example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
The arrow view seen from the arrow A direction of FIG.

FIG. 8 is a plan view showing an eighth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
The arrow view seen from the arrow A direction of FIG.

FIG. 9 is a side view showing a ninth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention;
FIG. 2 is a detailed view of a portion B in FIG. 1.

FIG. 10 is a plan view showing a tenth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, as viewed in the direction of arrow A in FIG. 1;

11 is a side view showing an eleventh example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of portion B in FIG. 1;

12 is a side view showing a twelfth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of portion B in FIG. 1;

13 is a side view showing a thirteenth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of a portion B in FIG. 1;

FIG. 14 is a side view showing a fourteenth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of portion B in FIG. 1;

FIG. 15 is a side view showing a fifteenth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of portion B in FIG. 1;

FIG. 16 is a side view showing a sixteenth example of the coil end portion of the rotor of the rotary electric machine according to the embodiment of the present invention, and is a detailed view of portion B in FIG. 1;

FIG. 17 is an explanatory diagram of an insulating block inserted between rotor coils in a rotor of a conventional rotary electric machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Insulation block, 2 ... Insulation rod, 3 ... Rotor core, 4 ...
Rotor coil, 5 ... insulating ring below holding ring, 6 ... holding ring, 7 ...
Groove part, 8 ... insulating piece, 9 ... protrusion, 10 ... drill hole, 11 ... insulating pin, 12 ... L-shaped insulator, 13 ... insulating ring under block, 14 ... glass fiber, 15 ... elastic insulator

(72) Inventor Takashi Kishibe 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Keihin Works, Toshiba Corporation (72) Inventor Masaki Ishiyama 2--4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Stock (72) Inventor Keiji Nagase 2-4, Suehirocho, Tsurumi-ku, Yokohama, Kanagawa Prefecture F-term (reference) 5H604 AA05 BB10 BB14 CC02 CC05 CC13 DA06 DA15 DB01 DB11 DB24 DB25 PB02 PB03 PC03 QA01 QA08 5H615 AA01 BB02 BB07 BB14 PP02 PP14 QQ03 QQ07 QQ26 QQ27 QQ28 RR02 TT23 TT26 TT34 5H619 AA05 BB02 BB06 PP02 PP12

Claims (6)

[Claims] 1. A rotor axial groove provided in a rotor coil at an end portion of a rotor of a rotating electric machine, an insulating piece fitted into the groove and interposed between the rotor coils, An insulating block having a gate-shaped shape to be fitted with the piece and inserted between the rotor coils, and an outer peripheral side of the insulating block and the rotor coil; A rotor for a rotating electrical machine, comprising: a holding ring that holds an end portion. 2. A rotor axial groove provided in a rotor coil at an end of a rotor of a rotary electric machine, an insulating block fitted in the groove and inserted between the rotor coils, and an insulating block. And a holding ring for holding an end portion of the rotor coil from an outer peripheral side of the rotor coil via an insulating ring below the holding ring. 3. A rotor radial groove provided in a rotor coil at an end portion of a rotor of a rotary electric machine, and a gate-shaped shape fitted into the groove, and inserted between the rotor coils. A rotor for a rotating electric machine, comprising: an insulating block; and a holding ring that holds an end portion of the rotor coil from an outer peripheral side of the insulating block and the rotor coil via a holding ring lower insulating ring. . 4. A rotor axial direction groove provided on a rotor coil at an end portion of a rotor of a rotary electric machine, and a projection which fits into the groove. An insulation block inserted between the child coils,
A rotor for a rotating electric machine, comprising: an insulating block; and a holding ring that holds an end portion of the rotor coil from an outer peripheral side of the rotor coil via an insulating ring below the holding ring. 5. A rotor axial direction groove portion provided in a rotor coil at an end portion of a rotor of a rotating electric machine, an insulating piece fitted into the groove portion and interposed between the rotor coils,
An insulating block fitted between the insulating pieces and inserted between the rotor coils, and an end portion of the rotor coil is held from an outer peripheral side of the insulating block and the rotor coil via an insulating ring below the holding ring. A rotating ring for a rotating electrical machine, comprising: 6. A drill hole provided in an inner diameter side of a rotor coil at an end portion of a rotor of a rotary electric machine in a radial direction of the rotor, an insulating pin fitted to the drill hole, and a drill hole fitted to the insulating pin. An L-shaped insulator fitted on the inner diameter side of the rotor coil fitted with the drilled hole and the insulating pin, and a groove fitted with the L-shaped insulator. An insulating block fitted with a letter-shaped insulator and inserted between the rotor coils, and an end portion of the rotor coil from an outer peripheral side of the insulating block and the rotor coil via a holding ring lower insulating ring. A rotor for a rotating electric machine, comprising: a holding ring for holding.