JPH05146104A - Synchronous generator - Google Patents

Abstract

(57) [Summary] [Purpose] To improve cooling performance, achieve size and weight reduction, and to easily increase output. [Composition] The generator rotor includes a cylindrical field iron core 1, a cylindrical field coil 2 accommodated in the cylindrical field iron core 1 through a slot, an iron core retainer 11 for pressing the cylindrical field iron core 1, and a cylindrical field iron. It is composed of a coil support 20 for supporting the end of the magnetic field coil 2 out of the slot of the cylindrical field iron core 1, and a glass bind 13 wound around the outer diameter side of this end to firmly support the end. ..
A ventilation groove 21 having a substantially semicircular cross section is provided in the circumferential portion 20a of the coil support 20 along the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous generator such as a cylindrical field type main generator for a vehicle, which is mounted on a diesel vehicle using an electric power transmission system, and in particular, has an improved cooling groove. It is about.

[0002]

2. Description of the Related Art Conventionally, for example, a synchronous generator such as a cylindrical field type main generator for a vehicle mounted on a diesel vehicle using an electric power transmission system, as shown in an eleventh example, Synchronous generator composed of a generator rotor consisting of a cylindrical field core 1 and a cylindrical field coil 2 and a statele consisting of a statele core 3 and a statele coil 4, an exciter 5, a rotary rectifier 6, a fan 7, a frame. It is composed of 8.

In the cylindrical field type synchronous generator configured as described above, the fan 7 is rotated by the rotation of a diesel engine (not shown), and intake ports 9a and 9b (provided that 9b sucks air (cooling wind) into the inside via a not shown one. The sucked cooling air flows as shown by the arrow in the figure, and the cylindrical field coil 2,
The cylindrical field iron core 1, the statele coil 4, the statele iron core 3, the exciter 5, the rotary rectifier 6, etc. are cooled and discharged to the outside through an exhaust port 10 provided on the diesel engine side (not shown).

By the way, as shown in FIG. 12, the generator rotor has an iron core retainer 11 for pressing the cylindrical field coil 2 and the cylindrical field iron core 1 housed in the cylindrical field iron core 1 and the cylindrical field iron core 1.
And a coil support 12 for supporting the cylindrical field coil 2. Here, the mechanism of power generation of the cylindrical field type main generator is that the driving force of a diesel engine (not shown) is transmitted to the generator rotor to rotate the generator rotor, and an induced electromotive force is generated between the generator and the statele. At this time, in order to prevent the cylindrical field coil 2 from being separated from the cylindrical field core 1 by the centrifugal force caused by the rotation of the generator rotor, the cylindrical field coil 2 is firmly bound to the coil support by the glass bind 13. In addition, 14 of FIG. 1 shows a rotor shaft.

[0005]

However, since a considerable amount of current flows through the cylindrical field coil 2, it is formed by the cylindrical field coil 2 and the coil support 12 although the temperature rises due to resistance heat. Since the space to be enclosed has a structure in which it is substantially sealed by the glass bind 13, there are the following problems. That is, (1) the inside of the cylindrical field coil 2 that retains heat is not directly exposed to the cooling air, and its cooling has no choice but to rely on heat dissipation by indirect heat transfer, so that the cooling efficiency is poor. .. Therefore, the rotation speed of the generator rotor is limited, and the output must be suppressed. (2) To suppress the internal temperature of the cylindrical field coil 2 by indirect electric heat discharge, structurally increase the space between the coils,
The sealed space mentioned above must be enlarged. For this reason, the size reduction of the cylindrical field coil 2 is restricted, and as a result, it is an obstacle to the size reduction and weight reduction of the cylindrical field type main generator.

SUMMARY OF THE INVENTION An object of the present invention is to provide a synchronous generator which improves cooling performance, achieves size and weight reduction, and can easily achieve high output.

[0007]

According to the present invention, an inner diameter side of an end portion of a cylindrical field coil extending from a slot of a cylindrical field iron core is supported by a coil support, and a glass bind is wound around the outer diameter side. In a synchronous generator equipped with a generator rotor composed of a cooling rotor, a cooling air introduction part is provided on the coil support, and a cooling air discharge part is formed between the cylindrical field core and the glass binding. It was done.

Further, according to the present invention, the generator is formed by supporting the inner diameter side of the end portion of the cylindrical field iron core projecting from the slot of the cylindrical field iron core with a coil support and winding the glass bind on the outer diameter side. In a synchronous generator equipped with a rotor, the cylindrical field coil is divided in the height direction, and a spacer having a cooling air introduction hole is inserted between them, and the cooling air flow between the cylindrical field core and the glass binding is The discharge part is formed.

[0009]

The cooling air can be passed directly into the cylindrical field coil through the introduction portion provided in the coil support or the introduction hole provided in the spacer, and the cooling efficiency is greatly improved, and the generator is improved. It is possible to increase the number of revolutions of the rotor, that is, increase the amount of power generated by the main generator, and even if the output is increased, the cylindrical field coil does not have to be structurally upsized as in the past, resulting in As a result, it is possible to reduce the size and weight of the synchronous generator.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of an embodiment of the present invention by cutting, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and 2, the generator rotor of the synchronous generator includes a cylindrical field core 1 and
A cylindrical field coil 2 housed through a slot in this cylindrical field core 1 and an iron core retainer 11 for pressing the cylindrical field core 1
And a coil support 20 that supports the end of the cylindrical field coil 2 out of the slot of the cylindrical field core 1, and prevents the cylindrical field coil 2 from being separated from the cylindrical field core 1 by the centrifugal force. The field coil 2 is wound around the outer diameter side of the end portion of the cylindrical field iron core 1 that is out of the slot with a glass bind 13 and firmly supported by the coil support 20.

The coil support 20 has substantially the same shape as the conventional coil support 12 described above, but has a ventilation groove 21 in the circumferential portion 20a. Here, the ventilation groove 21 has a substantially semicircular cross section as shown in FIG. 3, and is provided so as to extend along the axial direction. The other configurations are similar to those of the conventional synchronous generator.

Next, the operation of the embodiment configured as described above will be described. The fan 7 is rotated by direct rotation of a diesel engine (not shown), and cooling air is sucked into the inside through air inlets 9a and 9b (9b is not shown) provided in the frame 8. The sucked cooling air flows as shown by the arrow in FIG. 11 described above, and the cylindrical field iron core 1, the cylindrical field coil 2, the state coil 4, the state iron core 3, the exciter 5, the rotary rectifier 6, etc. are placed outside. And then flows as indicated by an arrow in FIGS. 1 and 2 to cool the inside of the cylindrical field coil 2. That is, part of the cooling air is sucked in from the ventilation groove 21, and the gap 2a between the coils of the cylindrical field coil 2 and the gap between the side surface of the coil and the cylindrical field iron core (including the side surface of the tooth portion of the slot). 2b, flows along the coil, and is discharged to the outer peripheral side of the generator rotor from the side surface of the cylindrical field iron core 1 (including the side surface of the tooth portion of the slot) and the opening 22 formed by the glass bind 13. The inside of the cylindrical field coil 2, which has been difficult in the past, is directly cooled.

Therefore, in the embodiment configured as described above, since it is possible to directly ventilate the cylindrical field coil 2 not only from the outside but also from the inside, the cooling efficiency is greatly improved. As a result, the cylindrical field coil 2 can be downsized, and as a result, the main generator can be reduced in size and weight, and the temperature limitation due to the increase in output can be suppressed. It is possible to provide a high-output synchronous generator that is smaller and lighter than conventional ones.

The present invention is based on the above-mentioned embodiment (hereinafter,
The present invention is not limited to the first embodiment) but can be variously modified and implemented, and the configuration thereof will be sequentially described below. FIG. 4 is a sectional view showing a main part of the second embodiment of the present invention. This second
The embodiment has the same structure as that of the above-described first embodiment except for the coil support 25. That is, the coil support 25 is
A ventilation hole 26 is provided in a. The ventilation holes 26 are arranged in the gap 2a between the coils of the cylindrical field coil 2,
As shown in FIG. 5, it has a circular shape (or an elliptical shape) and is provided so as to penetrate the circumferential portion 25a.

In the second embodiment configured as described above, the cooling air sucked into the frame 8 flows as indicated by the arrow in FIG. 11 described above, and the cylindrical field core 1, the cylindrical field coil 2 and the state are formed. The coil 4, the state iron core 3, the exciter 5, the rotary rectifier 6 and the like from the outside, and a part of the cooling air also flows as shown by the arrow in FIG. 4 to cool the inside of the cylindrical field coil 2. To do. That is, part of the cooling air is sucked in through the ventilation holes 26, and the gap 2 between the coils of the cylindrical field coil 2 is increased.
In the same way as in the first embodiment, the rotor is introduced into a and flows along the coil, and the generator rotor is opened from the side surface of the cylindrical field core 1 (including the side surface of the tooth portion of the slot) and the opening 22 formed by the glass bind 13. The air is exhausted to the outer peripheral side and directly cools the inside of the cylindrical field coil 2 which was difficult in the past. Therefore, this second
The embodiment can also obtain the same effect as that of the first embodiment described above.

FIG. 6 is a sectional view showing the main part of the third embodiment of the present invention. In the third embodiment, the coil support 30 and the cylindrical field coil 2 obtained by dividing the cylindrical field coil 2 in the height direction are used.
The structure is the same as that of the above-described first embodiment except that the spacer 31 is sandwiched between A and 2B. That is, the coil support 30 is the coil support of the second embodiment described above.
Similar to 25, it has ventilation holes 32 in the circumferential portion 30a. The ventilation holes 32 are formed along the axial direction of the coil support 30 in the space 2a between the coils of the cylindrical field coil 2B, the side surface of the coil and the cylindrical field core 1 (including the side surface of the tooth portion of the slot). It is arranged in the gap 2b, and has a circular shape (or an elliptical shape) and is provided so as to penetrate the circumferential portion 31a. The spacer 31 is formed of an insulating material,
As shown in FIG. 7, the planar shape is U-shaped and parallel 2
Rectangular ventilation holes 34a and 34b are provided on the sides 33a and 33b, respectively, and rectangular ventilation holes 34c are also provided at two locations on the side 33c orthogonal to the two sides 33a and 33b. Here, the ventilation holes 34a, 34
b is a gap 2a between the coil phases of the cylindrical field coils 2A and 2B.
Is placed in the part. The spacer 31 is 3 in FIG.
Since the individual pieces are sandwiched between the cylindrical field coils 2A and 2B, each shape is assumed to correspond to the planar shape of the coil.

In the third embodiment constructed as described above, the cooling air sucked into the frame 8 flows as indicated by the arrow in FIG. 11 described above, and the cylindrical field core 1 and the cylindrical field coils 2A, 2 are provided.
B, the statele coil 4, the statele iron core 3, the exciter 5, the rotary rectifier 6, etc. are cooled from the outside, and further, a part of them flows as indicated by the arrow in FIG.
Cool the inside of 2B. That is, part of the cooling air flows through the ventilation holes 32 of the coil support 30 and the ventilation holes 33a, 33 of the spacer 31.
b, 33c, and is introduced into the gap 2a between the coils of the cylindrical field coils 2A and 2B, the gap 2b between the coil and the side surface of the cylindrical field core 1 (including the side surface of the tooth portion of the slot), As in the first embodiment, the gas flows along the coil and is discharged to the outer peripheral side of the generator rotor from the side surface of the cylindrical field core 1 (including the side surface of the tooth portion of the slot) and the opening 22 formed by the glass bind 13. , The cylindrical field coil 2A, which was difficult in the past,
Cool the interior of 2B directly. Therefore, also in the third embodiment, the same effect as in the above-described first embodiment can be obtained.

FIG. 8 is a sectional view showing the main part of the fourth embodiment of the present invention. In this fourth embodiment, the glass bind 35
The structure is the same as that of the above-described third embodiment except that a, 35b, and 35c are wound with a gap provided therebetween. That is, the gaps 36a, 36a are provided between the glass binds 35a, 35b, 35c.
Is provided between the glass bind 35c and the side surface of the cylindrical field iron core 1 (including the side surface of the tooth portion of the slot), and the same opening portion 22 as in each of the above-described embodiments is formed.

In the fourth embodiment constructed as described above, all the cooling air introduced into the gaps 2a, 2a of the cylindrical field coils 2A, 2B in the third embodiment is exhausted from the opening 22. On the other hand, the cylindrical field coil 2 was exhausted from the gaps 36a, 36a to the outer peripheral side of the generator rotor, which was difficult in the past.
The inside of A and 2B is directly cooled. Therefore, this 4th
The embodiment can also obtain the same effect as that of the first embodiment described above.

FIG. 9 is a sectional view showing the main part of the fifth embodiment of the present invention. In the fifth embodiment, the coil support 30 is used, and the glass bind 13 is wound around the cylindrical field coil 2 with the spacer 31 interposed therebetween. In the fifth embodiment thus constructed, a part of the cooling air is sucked through the ventilation holes 32 of the coil support 30 and the ventilation holes 34c of the spacer 31 as shown by the arrows in FIG. Air is exhausted from the side surface (including the side surface of the tooth portion of the slot) and the opening 22 formed by the glass bind 13 to the outer peripheral side of the generator rotor to directly cool the inside of the cylindrical field coil 2 which was difficult in the past. .. Therefore, the same effect as that of the first embodiment described above can be obtained in the fifth embodiment.

FIG. 10 is a sectional view showing the main part of the sixth embodiment of the present invention. In the sixth embodiment, a coil support 30 is used and a ventilation gap 40 for sucking cooling air is formed between the cylindrical field coils 2A and 2B divided in the height direction. In the sixth embodiment thus constructed, a part of the cooling air is sucked in from the ventilation hole 32 of the coil support 30 and the ventilation gap 40 between the cylindrical field coils 2A and 2B as shown by the arrow in FIG. , All of the air is exhausted from the opening 22 formed by the side surface of the cylindrical field iron core 1 (including the side surface of the tooth portion of the slot) to the outer peripheral side of the generator rotor, and the inside of the cylindrical field coil 2 that has been difficult in the past is Cool directly. Therefore, also in the sixth embodiment, the same effect as in the above-described first embodiment can be obtained.

[0022]

As described above, according to the present invention, a spacer having an introduction hole is inserted between the introduction portion provided in the coil support or the cylindrical field coils divided in the height direction, and a part of the cooling air is blown. The inside of the cylindrical field coil is directly cooled by the cooling air that is sucked in and discharged from the discharge part formed between the cylindrical field core and the glass binding, which greatly improves the cooling performance of the cylindrical field coil. It is possible to provide a synchronous generator that is improved in size and the size of the cylindrical field coil can be reduced, and that is reduced in size and weight.

[Brief description of drawings]

FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 in the arrow direction.

FIG. 3 is a perspective view of a coil support used in the embodiment shown in FIG.

FIG. 4 is a cross-sectional view showing the main parts of another embodiment of the present invention.

5 is a perspective view of a coil support used in the embodiment shown in FIG.

FIG. 6 is a sectional view showing a main part of still another embodiment of the present invention.

7 is a perspective view of a spacer used in the embodiment shown in FIG.

FIG. 8 is a cross-sectional view showing the main parts of still another embodiment of the present invention.

FIG. 9 is a sectional view showing an essential part of still another embodiment of the present invention.

FIG. 10 is a sectional view showing an essential part of still another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a configuration of a conventional vehicle main generator.

12 is a cross-sectional view showing a state in which the cylindrical field coil of the conventional vehicle main generator shown in FIG. 11 is attached to a cylindrical field iron core.

[Explanation of symbols]

1 ... Cylindrical field core, 2, 2A, 2B ... Cylindrical field coil,
3 ... Statele iron core, 4 ... Statele coil, 5 ... Exciter, 6 ... Rotary rectifier, 7 ... Fan, 8 ... Frame, 13,
35a, 35b, 35c ... Glass bind, 20, 25, 30 ... Coil support, 21 ... Ventilation groove, 26, 32, 34a, 34b, 34c ... Ventilation hole, 31 ... Spacer.

Claims (2)

[Claims] 1. A generator rotor having an end portion of a cylindrical field coil extending from a slot of a cylindrical field iron core supported by a coil support and a glass bind wound around the outer diameter side. In the synchronous generator, the coil support is provided with a cooling air introduction portion, and the cooling air discharge portion is formed between the cylindrical field iron core and the glass binding. 2. A synchronous machine comprising a generator rotor having a coil support for supporting the inner diameter side of the end of the cylindrical field coil from a slot of the cylindrical field iron core and winding a glass bind on the outer diameter side. In the generator, the cylindrical field coil is divided in the height direction, and a spacer having a cooling air introduction hole is interposed therebetween, and the cooling air discharge part is provided between the cylindrical field iron core and the glass binding. A synchronous generator characterized in that