JP2003348796A - Dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a dynamo-electric machine, wherein a rotor self-ventilation fan head in a rotor ventilating duct which is opposed to the air supply section of a stator in air gap portion in between a rotor and the stator is reduced in size, and thus the air supply portion of the stator is vented efficiently. <P>SOLUTION: A rotor wedge hole 17a is positioned at the outlet of the rotor ventilation duct 10, which is opposed to the stator air supply section 19 in the air gap 12g between the stator 4 and the rotor 1. The wedge hole 17 is inclined at a predetermined angle of inclination, in a direction which is opposite to the direction of rotation. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine such as a turbine generator, in which a cooling gas is efficiently guided by a rotor self-ventilating fan head generated by rotation of the rotor itself. A rotating electric machine.

[0002]

2. Description of the Related Art Conventionally, as an example of a turbine generator, there is a turbine generator having a cooling structure of a radial flow system.
FIG. 1 is a cross-sectional view schematically illustrating a cooling structure of the entire turbine generator for explaining this.

The rotor 1 includes a rotor coil (rotor winding) 2
And a rotor core 3 having a rotor shaft 8, and is rotatably supported by a fixed structure including the stator 4 via a bearing mechanism (not shown). Rotor coil ends (rotor winding ends) protruding from both ends in the axial direction of the rotor core 3 are covered with the retaining ring 5 on the outer peripheral side of the coil ends, and the rotor 1
When the rotor rotates, the rotor coil 2 is protected from being deformed by a strong centrifugal force acting on the end of the rotor coil. The stator 4 includes a stator coil (stator winding) 6 and a stator core 7.

The cooling structure (ventilation system) of the turbine generator has a fan 9 provided symmetrically at both ends of a rotor shaft 8 and a cylindrical rotor core 3 from its outer peripheral surface toward the rotor shaft. A plurality of rotor ventilation ducts 10 formed in a radial direction, a stator core 7 having a cylindrical shape and a stator coil housing portion formed in an axial direction, and a stator core 7 extending along an outer circumferential surface along a lamination surface. And a plurality of stator ventilation ducts 11 formed as described above.

FIG. 12 is an enlarged cross-sectional view of the rotor ventilation duct 10. Specifically, FIG.
FIG. 3 is an enlarged cross-sectional view taken along a line and viewed in a direction of an arrow. In FIG. 12, the rotor ventilation duct 10 has rotor coil holes 14 provided in the rotor coils 6 stacked in the radial direction.
And a creepage block 1 for ensuring a circular insulation distance between the rotor coil 6 and the rotor wedge 17
5, a click page block hole 16 provided in the click page block 15, and a rotor wedge hole 18 formed in a rotor wedge 17 in a radial direction.

In such a configuration, a cooling gas from a cooling indicator (not shown) is supplied from a cooling indicator (not shown) by a fan 9 attached to an end portion of the rotor shaft 8 and a cooling gas flow between the stator side and the rotor side. It is branched into a cooling gas stream.

[0007] The stator-side cooling gas flow cools the stator coil 6 in the course of passing through the stator ventilation duct 11 in the air supply section 19 of the stator 4, and passes through the stator gap in the exhaust section 20 via the air gap 12 g. Duct 11,
The air is discharged from an exhaust duct (not shown) through an exhaust passage (not shown) and a cooler.

Here, the air supply section 19 refers to a room for supplying the cooling gas from the cooling gas cooler to the stator 4. The exhaust section 20 refers to a room for supplying the cooling gas from the rotor 1 to the cooling gas cooler via the stator 4.

The cooling gas flow on the rotor side flows into the gap between the ends of the rotor coil 6 in the holding ring 5 and passes through the sub-slots 13 and the rotor coil holes 14 of the rotor ventilation duct 10. 4 and is discharged to the air gap 12g portion of the rotor 1. In this process, the rotor coil 2 including the coil ends
Is cooled, merges with the cooling gas that has passed through the air supply section 19 of the stator 4 at the air gap 12 g between the rotor 1 and the stator 2 on the outer peripheral side of the rotor 1, and is fixed at the exhaust section 20 of the stator 4. The air is discharged from the exhaust duct to the outside through the sub ventilation duct 11.

Here, part of the cooling gas discharged from the rotor wedge hole 18 to the air gap 12g passes through the air supply section 19 of the stator core 7 and the stator ventilation duct 11,
A part of the cooling gas flowing into the air gap 12g and the cooling gas flowing from the axial end of the air gap 12g into the air gap 12g cause the stator ventilation duct 11 in the exhaust section 20 to move from the inner circumference to the outer circumference. Flows to the side, cools the stator core 7 and stator coil 6 in the exhaust section 20, flows to the exhaust section 20, and is cooled by a cooler (not shown).

The remaining portion of the cooling gas discharged from the rotor wedge hole 18 of the rotor 1 to the air gap 12g,
The remaining portion of the cooling gas that has flowed into the air gap 12g from the air supply section 19 flows from the inner peripheral side to the outer peripheral side of the stator ventilation duct 11 in the exhaust section 20, and the stator core in the exhaust section 20 7 and the stator coil 6 are cooled to reach a cooler (not shown in FIGS. 11 and 12, but shown as 24 in FIGS. 1 to 10) through the exhaust passage, where they are cooled.

The cooling gas in the rotor 1 acts like a fan by the rotation of the rotor itself and rotates in the direction of wind generated in the axial direction, that is, by the ventilation fan head (rotor self-ventilation fan effect). The child ventilation duct 10 flows. In this case, the size of the rotor self-ventilation fan head is determined when the rotor ventilation duct 10 is used as the flow path of the fan 9.
A velocity triangle composed of the absolute flow velocity, the swirling velocity, and the relative velocity of the subslot 13 corresponding to the flow path entrance, and a velocity triangle composed of the absolute flow velocity, the swirling velocity, and the relative flow velocity of the rotor wedge 17 corresponding to the flow path exit. Decided.

All the heads are composed of a pressure head by a centrifugal action and a speed head by a speed increasing action. The pressure head is determined by the radial position of the sub-slot 13 and the rotor wedge 17 because it depends on the dynamic pressure difference of the swirling flow velocity at the position of the sub-slot 13 which is the inlet of the rotor ventilation duct 10 and the position of the rotor wedge 17 which is the outlet. The speed head also depends on the radial flow velocity. However, when the radius of the rotor coil hole 14 and the radius of the rotor wedge hole 18 are almost the same, the effect is small. Like the head, it is the dominant factor.

In this case, the speed head is the air gap 12
As long as the static pressure is not restored at g, the outlet loss of the rotor ventilation duct 10 results. If the self-ventilation fan head becomes large by reducing the outlet loss, an increase in the airflow to the rotor coil 2 and an improvement in the coil cooling performance can be expected.

On the other hand, the cooling gas in the stator ventilation duct 11 in the air supply section 19 of the stator 4 flows due to the pressure difference between the head of the fan 9 and the air gap 12g. Therefore, if the pressure of the air gap 12 g increases with the increase of the self-ventilating fan head of the rotor 1, the cooling gas hardly flows to the air supply section 19, so that it is necessary to increase the head of the fan 9.

[0016]

As described above, in a conventional rotating electric machine having a cooling structure for the stator 4 and the rotor 1, the rotor self-ventilating fan is increased as the radial dimension of the rotor 1 is increased. Head gap increases and air gap 12
Since the pressure in the g section becomes high and the cooling gas pressure-fed to the air supply section 19 by the head (pressure) of the fan 9 installed at the end of the rotor shaft 8 becomes difficult to ventilate, There is a problem in that the size of the motor must be increased or the output of the rotating electric machine must be suppressed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a rotor self-ventilating fan head which is generated by rotation of a rotor, and is efficiently provided in an air supply section of a stator. It is an object of the present invention to provide a rotating electric machine that allows ventilation.

[0018]

In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and are fixed in an axial direction on an inner peripheral side. A stator in which a plurality of stator coil housing portions for housing the stator coils are formed, and the outer periphery of the stator core, which communicates with the stator ventilation duct, to supply cooling gas to the stator core. An air supply section for supplying, an exhaust section for discharging cooling gas from the stator core, and a rotatable shaft disposed on an inner peripheral side of the stator core via an air gap; A rotor coil storage part for storing a plurality of rotor coils in the direction is formed,
And a rotor in which a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is prevented from being scattered from the rotor coil storage portion due to centrifugal force accompanying rotation of the rotor, and the rotation is prevented. A plurality of wedge members each having a wedge hole formed to communicate the rotor ventilation duct and the air gap, and to rotate the rotor. The rotating electric machine further includes fan head adjusting means for making the rotor self-ventilating fan heads respectively generated in the air supply section and the exhaust section smaller on the air supply section side than on the exhaust section side.

According to a second aspect of the present invention, a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a stator coil is accommodated in an axial direction on an inner peripheral side. A stator having a plurality of stator coil storage portions formed therein, and an air supply for supplying cooling gas to the stator core, which communicates with the stator ventilation duct on the outer peripheral side of the stator core. A section and an exhaust section for exhausting cooling gas from the stator core; and a plurality of rotors disposed rotatably on an inner peripheral side of the stator core via an air gap, and in an axial direction on an outer peripheral side. A rotor in which a rotor coil storage portion for storing a coil is formed, and a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is rotated by centrifugal force accompanying rotation of the rotor. Child coil storage The wedge holes are formed to prevent scattering from the rotor coil and to maintain a creeping insulation distance between the rotor coil and the rotor ventilation duct and the air gap. Each wedge hole facing the air supply section is a rotating electric machine including a plurality of wedge members inclined by a predetermined angle θ in a direction opposite to a rotation direction of the rotor.

The invention corresponding to claim 3 is as follows. That is, the rotating electric machine according to claim 2, wherein the inclination angle θ of the wedge hole formed in the wedge member satisfies the expression (2).

[0021]

(Equation 2)

According to a fourth aspect of the present invention, a plurality of stator ventilation ducts are formed in a radial direction of a stator core to accommodate a stator coil in an axial direction on an inner peripheral side. A stator having a plurality of stator coil storage portions formed therein, and an air supply for supplying cooling gas to the stator core, which communicates with the stator ventilation duct on the outer peripheral side of the stator core. A section and an exhaust section for exhausting cooling gas from the stator core; and a plurality of rotors disposed rotatably on an inner peripheral side of the stator core via an air gap, and in an axial direction on an outer peripheral side. A rotor in which a rotor coil housing portion for housing a coil is formed, and a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is rotated by centrifugal force accompanying rotation of the rotor. Child coil storage section Wedge holes formed so as to prevent scattering and communicate with the rotor ventilation ducts and the air gap are inclined in a direction opposite to the rotation direction, and are wedge holes facing the exhaust section. And a wedge member inclined at a different angle from a wedge hole facing the air supply section.

According to a fifth aspect of the present invention, a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a stator coil is accommodated in an axial direction on an inner peripheral side. A stator having a plurality of stator coil storage portions formed therein, and an air supply for supplying cooling gas to the stator core, which communicates with the stator ventilation duct on the outer peripheral side of the stator core. A section and an exhaust section for exhausting cooling gas from the stator core; and a plurality of rotors disposed rotatably on an inner peripheral side of the stator core via an air gap, and in an axial direction on an outer peripheral side. A rotor in which a rotor coil housing portion for housing a coil is formed, and a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is rotated by centrifugal force accompanying rotation of the rotor. Child coil storage section Radial lengths of wedge holes formed to prevent scattering and communicate with the rotor ventilation ducts and the air gap are formed shorter on the exhaust section side than on the air supply section side. A rotating electric machine including the wedge member described above.

In order to achieve the above object, an invention according to claim 6 is directed to forming a plurality of stator ventilation ducts in a radial direction of a stator core and accommodating a stator coil in an axial direction on an inner peripheral side. A stator having a plurality of stator coil storage portions formed therein, and an air supply for supplying cooling gas to the stator core, which communicates with the stator ventilation duct on the outer peripheral side of the stator core. A section and an exhaust section for exhausting cooling gas from the stator core; and a plurality of rotors disposed rotatably on an inner peripheral side of the stator core via an air gap, and in an axial direction on an outer peripheral side. A rotor in which a rotor coil housing portion for housing a coil is formed, and a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is rotated by centrifugal force accompanying rotation of the rotor. Child coil storage section Of the wedge holes formed to prevent scattering and communicate with the rotor ventilation ducts and the air gap, the wedge hole corresponding to the vicinity of the axial end of the air gap is rotated. And a wedge member inclined by a predetermined angle θ in a direction opposite to the direction.

According to a seventh aspect of the present invention, a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a stator coil is accommodated in an axial direction on an inner peripheral side. A stator having a plurality of stator coil storage portions formed therein, and an air supply for supplying cooling gas to the stator core, which communicates with the stator ventilation duct on the outer peripheral side of the stator core. A section and an exhaust section for exhausting cooling gas from the stator core; and a plurality of rotors disposed rotatably on an inner peripheral side of the stator core via an air gap, and in an axial direction on an outer peripheral side. A rotor in which a rotor coil housing portion for housing a coil is formed, and a plurality of rotor ventilation ducts are formed in a radial direction, and the rotor coil is rotated by centrifugal force accompanying rotation of the rotor. Child coil storage section Of the wedge holes formed to prevent scattering and communicate with the rotor ventilation ducts and the air gap, the wedge hole corresponding to the vicinity of the axial end of the air gap is rotated. Direction at a predetermined angle θ
And a wedge member that is only inclined.

The invention corresponding to claim 8 is as follows. That is, the rotor coil of each wedge member housed in the rotor coil housing portion and a communication path communicating between the wedge holes respectively formed on the opposite side are formed, and each of the communication paths is The rotating electric machine according to any one of claims 1 to 7, wherein a partition is formed at a boundary between the air supply section and the exhaust section.

[0027] The invention corresponding to claim 9 is as follows. That is, in the air gap,
The rotating electric machine according to any one of claims 1 to 7, wherein a partition that separates a portion corresponding to the air supply section and a portion corresponding to the exhaust section is provided on the stator core side.

The invention corresponding to claim 10 is as follows. That is, the wedge member is formed of a rotor wedge and a crimper block, or is formed by integrally forming the rotor wedge and the crimper block.
It is a rotating electric machine according to any one of claims 1 to 8.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a configuration example of a ventilation system of a rotor and a stator in a rotating electric machine according to a first embodiment of the present invention and a rotor ventilation duct facing an air supply section of the stator. The same elements as those in FIGS. 11 and 12 are denoted by the same reference numerals and will be described.

The rotating electric machine of the present invention is characterized in that a fan head adjusting means described below is provided in a radial flow type rotating electric machine. Hereinafter, this will be described.

The radial flow type rotary electric machine has a cylindrical shape, in which a plurality of stator ventilation ducts 11 are formed in a radial direction, and a stator coil housing portion 7a is formed in an axial direction on an inner peripheral side. The stator core 7, the stator coil 6 housed in the stator coil housing 7 a, and the outer peripheral side of the stator core 7, which are formed to communicate with the stator ventilation duct 11, cool the stator core 7. An air supply section 19 for supplying cooling gas from the heater 24 is formed to communicate with the stator ventilation duct 11 on the outer peripheral side of the stator core 7, and the cooling gas from the stator core 7 is exhausted. Yes (cooler 2
4) and the stator core 7
Is rotatably disposed on the inner peripheral side through an air gap 12g, and has a plurality of rotor coil storage sections 3a in the axial direction on the outer peripheral side.
And a plurality of rotor ventilation ducts 1 in the radial direction
0, a plurality of rotor coils 2 housed in each rotor coil housing 3a via an insulator 16, and each rotor coil housing 3a. A metallic rotor wedge 17 housed between the air gap 12g side and the rotor coil 2 to prevent the rotor coil 2 from being scattered from each rotor coil housing 3a due to centrifugal force accompanying rotation; , A clip block disposed between the rotor wedge 17 and the rotor coil 2 for maintaining a creepage insulation distance therebetween, and a clip block for communicating the rotor ventilation duct 1014 with the air gap 12g. 15 and a rotor wedge 17 are respectively formed in a clip block hole 15a and a rotor wedge hole 17a. An insulator 16 is provided in each rotor coil housing 3a and between the rotor coils 2.

In the rotary electric machine having such a configuration, the fan head adjusting means is, as a schematic configuration, generated in each of the air supply section 19 and the exhaust section 20, and includes the rotary shaft 8, the rotor core 3, and the rotor. The rotor self-ventilating fan head generated in the axial direction as the rotor 1 including the coil 2, the rotor wedge 17 and the clip block 15 rotates rotates the air supply section 19 side relative to the exhaust section 20 side. It is intended to make it smaller.

As shown in FIG. 2, the fan head adjusting means tilts the rotor wedge hole 17a of the rotor ventilation duct 10 facing only the air supply section 19 of the stator 4 by a predetermined tilt angle .theta. Things. FIG. 2 is a view similar to FIG.
FIG. 3 is an enlarged sectional view cut along two lines and viewed in the direction of an arrow.

Here, it is desirable that the predetermined inclination angle θ satisfies the above-mentioned equation (2).

The rotor wedge 17 and the crimper block 15 constituting the wedge member are not limited to those having different configurations.
7 and the function of the clear page block 15 may be integrally formed.

It is desirable that the direction of the flow path be smoothly changed at the corner between the straight portion and the inclined portion of the rotor wedge hole 17a so that the flow does not separate.

When the thickness (height) of the rotor wedge 17 is small and the thickness (height) of the click page block 15 is large, the rotor wedge hole 17a and the clear page block may be used. A similar effect can be obtained by forming an oblique flow path by combining the holes 15a.

In this case, the air supply section 19 of the stator 4
In this case, the rotational velocity component of the absolute velocity vector of the cooling gas flowing into the rotor ventilation duct 10 and the rotational velocity component of the absolute velocity vector of the cooling gas flowing out of the rotor ventilation duct 10 become substantially the same, so that the speed increasing effect is eliminated. The speed head becomes smaller.

As described above, since the pressure in the air gap 12g between the rotor 1 and the stator 4 corresponding to the air supply section 19 is reduced, the stator ventilation duct 1 of the air supply section 19 is reduced.
1, the cooling gas is efficiently pumped under the action of the fan 9 installed at the end of the rotor shaft 8. In addition, the turning velocity component of the absolute velocity vector is reduced by directing the relative velocity vector of the cooling gas at the rotor ventilation duct outlet in the air supply section 19 in the anti-rotation direction. The speed head becomes smaller. As a result, the speed head due to the effect of increasing the flow velocity of the rotor self-ventilating fan head is reduced.

Further, since the turning velocity component of the absolute velocity vector of the cooling gas at the outlet of the rotor ventilation duct 10 becomes equal to the turning velocity component of the absolute velocity vector of the cooling gas at the entrance of the rotor ventilation duct 10, It becomes almost zero. Thereby, the pressure in the air gap 12g corresponding to the air supply section 19 of the stator 1 is reduced, and the cooling gas pumped by the fan 9 installed at the end of the rotor shaft 8 is efficiently supplied to the air supply section 19. And the temperature rise of the stator coil can be suppressed.

FIG. 3 is a sectional view showing a configuration example of a rotor and stator ventilation system and a rotor ventilation duct 10 facing a stator exhaust section in a rotating electric machine according to a second embodiment of the present invention. The same elements as in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described here.

In the second embodiment, the rotor wedge hole 17a of the rotor ventilation duct 10 facing the air supply section 19 and the exhaust section 20 of the stator 4 is inclined at a predetermined angle θ in the anti-rotation direction. is there. It is desirable that the flow path direction be smoothly changed at the corners of the straight portion and the inclined portion of the rotor wedge hole 18 so that the flow does not separate.

When the thickness of the rotor wedge 17 is small and the thickness of the crevice block 15 is large, the rotor wedge hole 17a and the crevice block hole 15a are combined to form an oblique flow path. Thus, a similar effect can be obtained. Rotor ventilation duct 1 facing exhaust section 20
The inclination angle of the exit of the rotor wedge hole 18 is set to the air supply section 19.
By making the inclination angle of the outlet of the rotor wedge hole 17a of the rotor ventilation duct 10 opposed to the
The size of the self-ventilation fan head of the rotor ventilation duct 10 opposing 0 can be suppressed.

In this case, the exhaust section 20 of the stator 4
And in the air supply section 19, the rotor ventilation duct 10
The rotational velocity component of the absolute velocity vector of the cooling gas flowing into the rotor and the rotational velocity component of the absolute velocity vector of the cooling gas flowing out of the rotor ventilation duct 10 are substantially the same, so that the speed increasing effect is eliminated and the velocity head is reduced. .

As described above, since the pressure in the air gap 12g in the gap between the rotor 1 and the stator 4 corresponding to the exhaust section 20 and the air supply section 19 of the stator 4 becomes smaller, the air supply to the stator 4 is reduced. A fan installed at the end of the rotor shaft 8 is provided in the stator ventilation duct 11 of the section 19.
The cooling gas is efficiently pumped by the nine heads, and in the exhaust section 20, since the swirling flow velocity component at the outlet of the rotor ventilation duct 10 is reduced, the outlet loss is greatly reduced.

FIG. 4 is a cross-sectional view showing a configuration example of the rotor and stator ventilation systems and the rotor ventilation duct 10 facing the exhaust section of the stator in the rotating electric machine according to the third embodiment of the present invention. FIG. 5 is an enlarged sectional view taken along the line 5-5 in FIG. 4 and viewed in the direction of the arrow. The same elements as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described here.

In the third embodiment, the radial length of the rotor wedge hole 17b is shorter on the exhaust section 20 side than on the air supply section 19 side. In particular,
The exit of the rotor wedge hole 17b is formed with a chamfered portion 17c of C5 (radius 5 mm) or more, or the exit of the rotor wedge hole 17b is chamfered not on the entire circumference of the rotor wedge hole 17b but on the downstream side in the rotation direction. Or changing the radial dimension of the outer periphery of the rotor wedge 17. By doing so, the self-ventilation fan head of the rotor ventilation duct 10 can be made smaller on the air supply section 19 side than on the exhaust section 20 side.

In this case, the air supply section 19 of the stator 4
In this case, the difference between the dynamic pressure at the entrance of the rotor ventilation duct 10 due to the rotating speed of the rotor 1 and the dynamic pressure at the exit of the rotor ventilation duct 10 due to the rotating speed of the rotor 1 becomes small, so that the centrifugal action is reduced. The pressure head becomes smaller.

As described above, the air supply section 19 of the stator 4
Air gap 1 between the rotor 1 and the stator 4 corresponding to
Since the pressure at the 2 g portion is reduced, the cooling gas is efficiently pumped into the stator ventilation duct 11 of the air supply section 19 of the stator 4 by the head of the fan 9 installed at the end of the rotor shaft.

FIG. 6 is a sectional view showing a ventilation system for a rotor and a stator in a rotary electric machine according to a fourth embodiment of the present invention. FIG. 7 is a sectional view taken along the line 7-7 in FIG. FIG. The same elements as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described here.

In the fourth embodiment, an air gap of 12 g
The rotor wedge hole 17d of the rotor ventilation duct 10 corresponding to the axial end of the portion is inclined at a predetermined inclination angle θ in the anti-rotation direction. In this case, it is desirable to smoothly change the flow path direction at the corners of the linear portion and the inclined portion of the rotor wedge hole 17d so that the flow does not separate. Note that the predetermined inclination angle θ satisfies the above expression (2).

The following may be a modification of the fourth embodiment. That is, when the thickness of the rotor wedge 17 is small and the thickness of the crease block 15 is large, the rotor wedge hole 18 and the crevice block hole 1 are used.
By forming an oblique flow path in accordance with 5a, the same effect as in FIG. 7 can be obtained.

In this case, at the axial end of the air gap 12g, the turning velocity component of the absolute velocity vector of the cooling gas flowing into the rotor ventilation duct 10 and the rotation of the absolute velocity vector of the cooling gas flowing out of the rotor ventilation duct 10 Since the flow velocity components are substantially the same, the speed increasing effect is eliminated and the speed head is reduced.

As described above, the pressure at the end of the air gap 12g is reduced, so that when the axial end of the air gap 12g is open, the head of the fan 9 installed at the axial end of the rotor 1 The cooling gas whose temperature has not been increased and which has not been heated is directly led to the air gap 12g, and the temperature increase near the end of the stator coil 6 is suppressed. Also,
Since the swirling flow velocity component at the exit of the rotor ventilation duct 10 becomes smaller, the exit loss is greatly reduced.

FIG. 8 is a sectional view showing a ventilation system for a rotor and a stator in a rotary electric machine according to a fifth embodiment of the present invention. The same elements as those in FIG. Here, only the different parts will be described.

The fifth embodiment differs from the first embodiment in that the baffle 21 is provided on the axial end of the air gap 12g and on the axial end of the stator core 7.
The cooling gas generated by the fan 9 provided at the end of the rotating shaft is prevented from flowing into the air gap 12g as much as possible. The other points are the same as those of the first embodiment.

In the fifth embodiment as well, it is desirable that the direction of the flow path changes smoothly at the corners of the straight portion and the inclined portion of the rotor wedge hole 17a so that the flow does not separate. In order to realize this, when the thickness of the rotor wedge 17 is small and the thickness of the crease block 15 is large, the oblique flow passage is formed by combining the rotor wedge hole 17a and the crease block block hole 15a. May be formed.

In this case, since the swirling velocity component of the absolute velocity vector of the cooling gas at the exit of the rotor ventilation duct 10 at the end of the air gap 12 becomes large, the velocity head by the flow velocity increasing action of the rotor self ventilation fan head becomes large. .

According to the fifth embodiment described above, even when the pressure at the axial end of the air gap 12g increases, the axial end of the air gap 12g is
1 to reduce the inflow of cooling gas from the fan 9 installed at the shaft end of the rotor 1 through the gap between the baffle 21 and the rotor 1, and increase the pressure at the axial end of the air gap 12g. Is suppressed.

FIG. 9 is a view for explaining the sixth embodiment of the present invention, and is an enlarged sectional view showing the click page block 15 according to any of the first to fifth embodiments. In the sixth embodiment, a link is provided that allows communication between the rotor coil 2 of each rotor wedge 17 stored in the rotor coil storage section and the crevice block holes 15a and 15b formed on the opposite side, respectively. Each of the passages, for example, the communication groove 22 is formed,
Each of the communication grooves 22 forms a partition 15 d at a boundary between the air supply section 19 and the exhaust section 20.

In the sixth embodiment described above, since each communication groove 22 is formed with a partition 15 d at the boundary between the air supply section 19 and the exhaust section 20, the internal pressure of the rotor ventilation duct 10 is reduced. Therefore, even when there is a pressure gradient in the communication groove 22 of the crease block 15, the cooling gas flows between the rotor ventilation ducts 10 and between the rotor ventilation ducts 10 corresponding to the boundaries of the respective sections of the stator 4. Is suppressed.

As a result, the air supply section 19 of the stator 4
Rotor ventilation duct 10 and exhaust section 20 facing
When all the heads of the rotor ventilation duct 10 that face each other are different, the pressure loss of the cooling gas flowing through the communication groove 22 can be suppressed.

FIG. 10 is a sectional view showing a ventilation system for a rotor and a stator in a rotary electric machine for explaining a seventh embodiment of the present invention. The same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

In the seventh embodiment, all the heads of the rotor ventilation duct 10 facing the air supply section 19 of the stator 4 and the rotor ventilation duct 10 facing the exhaust section 20
When all the heads are different, a partition 23 for partitioning each section of the stator 4 is provided in the air gap 12g on the inner peripheral surface of the stator core 7 facing the air gap 12g.

In this case, even when the pressure in the air gap 12g is different due to the difference in the pressure in the duct of the rotor ventilation duct 10, the air gap 12g corresponding to the air supply section 19 of the stator 4 and the exhaust section 20 are connected. The averaging of the corresponding air gap 12g can be suppressed.

As described above, according to the seventh embodiment, when all the heads of the rotor ventilation duct 10 facing the air supply section 19 of the stator 4 and the rotor ventilation duct 10 facing the exhaust section 20 are different, The average pressure rise in the air gap 12g portion is suppressed.

<Modifications> The present invention is not limited to the above-described embodiment, and may be modified as follows, for example. In the above-described embodiment, an example was described in which the rotor wedge 17 and the crease block 15 were separately configured as the wedge members housed in the rotor coil housing portion of the rotor core, but are not limited thereto. Instead, the rotor wedge 17 and the crimper block 15 may be simply integrated,
Also, one member that satisfies the essential functions of both may be used.

Further, in the above-described embodiment, the example in which the fans 9 are provided at both ends in the axial direction of the rotating shaft 8 has been described as an example. Any rotating electric machine that generates a rotor self-ventilating fan head by rotating itself can be used.

Further, the rotor wedge hole 17 of the above-described embodiment is used.
The inclination angle of a may be any value as long as it satisfies the expression (2).

[0071]

According to the present invention, the rotor self-ventilating fan head of the rotor ventilation duct facing the air supply section of the stator at the air gap portion between the rotor and the stator is reduced, It is possible to provide a rotating electric machine that can efficiently ventilate the air supply section.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a rotor and stator ventilation system and a rotor ventilation duct in a first embodiment of a rotating electric machine according to the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line 2─2 of FIG. 1 and viewed in the direction of the arrow.

FIG. 3 is a cross-sectional view illustrating a rotor and stator ventilation system and a rotor ventilation duct in a second embodiment of the rotating electric machine according to the present invention.

FIG. 4 is a sectional view showing a rotor and stator ventilation system and a rotor ventilation duct in a third embodiment of the rotating electric machine according to the present invention.

FIG. 5 is an enlarged sectional view taken along the line 5-5 in FIG. 4 and viewed in the direction of the arrow;

FIG. 6 is a cross-sectional view illustrating a rotor and stator ventilation system and a rotor ventilation duct in a fourth embodiment of the rotating electric machine according to the present invention.

FIG. 7 is an enlarged sectional view taken along the line 7-7 in FIG. 6 and viewed in the direction of the arrow;

FIG. 8 is a sectional view showing a ventilation system for a rotor and a stator in a fifth embodiment of the rotating electric machine according to the present invention.

FIG. 9 is an enlarged sectional view showing a click page block in a sixth embodiment of the rotating electric machine according to the present invention.

FIG. 10 is a sectional view showing a ventilation system for a rotor and a stator in a seventh embodiment of the rotating electric machine according to the present invention.
The figure which expands and shows the click page block of a rotor ventilation duct.

FIG. 11 is a cross-sectional view showing a cooling structure of the entire conventional turbine generator.

FIG. 12 is an enlarged sectional view taken along the line 12-12 in FIG. 11 and viewed in the direction of the arrow;

[Explanation of symbols]

1 ... rotor 2 ... rotor coil 3 ... rotor core 4 ... Stator 5 ... Retaining ring 6… Stator coil 7 ... stator core 8 ... Rotor shaft 9 ... Fan 10 ... Rotor ventilation duct 11 ... stator ventilation duct 12g ... air gap 13 ... subslot 2a ... Rotor coil hole 15 ... Cripage Block 15a: Cripage block hole 17 ... Rotor wedge 17a ... Rotor wedge hole 19 ... Air supply section 20 ... Exhaust section 21 ... Baffle 22 ... communication groove 23 ... partition

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 5H604 AA03 BB04 BB10 BB14 CC02                       CC05 CC14 PB03 QC01 QC09                 5H609 BB03 BB19 PP02 PP08 PP09                       QQ03 QQ10 QQ16 QQ18 RR03                       RR17 RR21 RR22 RR42 RR51

Claims (10)

[Claims] 1. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner peripheral side are formed. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force caused by rotation of the rotor, and Along with the rotor coil A plurality of wedge members each having a wedge hole formed so as to maintain a surface insulation distance and communicate with the rotor ventilation duct and the air gap; and A rotating electric machine comprising: fan head adjusting means for making the rotor self-ventilating fan heads respectively generated in the air section and the exhaust section smaller on the air supply section side than on the exhaust section side. 2. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner peripheral side are formed. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And, a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force accompanying the rotation of the rotor,
And, for keeping the creepage insulation distance with the rotor coil, of the wedge holes respectively formed so as to communicate with the respective rotor ventilation ducts and the air gap, facing the air supply section. A plurality of wedge members, each wedge hole being inclined by a predetermined angle θ in a direction opposite to the rotation direction of the rotor. 3. The rotating electric machine according to claim 2, wherein the inclination angle θ of the wedge hole formed in the wedge member satisfies Expression (1). (Equation 1) 4. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner peripheral side are formed. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force caused by rotation of the rotor, and Each rotor ventilation duct And the wedge holes respectively formed so as to communicate with the air gap are inclined in the direction opposite to the rotation direction, and the wedge holes facing the exhaust section are different from the wedge holes facing the air supply section. A rotating electric machine comprising: a wedge member inclined at an angle. 5. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner circumferential side. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force caused by rotation of the rotor, and Each rotor ventilation duct And a wedge member formed such that a radial length of a wedge hole formed to communicate with the air gap is shorter on the exhaust section side than on the air supply section side. 6. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner peripheral side are formed. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force caused by rotation of the rotor, and Each rotor ventilation duct And a wedge hole formed so as to communicate with the air gap, a wedge hole corresponding to the vicinity of the axial end of the air gap is a wedge member inclined by a predetermined angle θ in a direction opposite to the rotation direction. And a rotating electric machine comprising: 7. A stator in which a plurality of stator ventilation ducts are formed in a radial direction of a stator core, and a plurality of stator coil housing portions for housing a stator coil in an axial direction on an inner peripheral side are formed. An air supply section on the outer peripheral side of the stator core and communicating with the stator ventilation duct to supply cooling gas to the stator core, and for discharging cooling gas from the stator core. An exhaust section, and a rotor coil housing portion for rotatably disposed on an inner peripheral side of the stator core via an air gap and accommodating a plurality of rotor coils in an axial direction on an outer peripheral side is formed. And a rotor in which a plurality of rotor ventilation ducts are formed in the radial direction, and preventing the rotor coil from being scattered from the rotor coil storage portion due to centrifugal force caused by rotation of the rotor, and Each rotor ventilation duct Of the wedge holes respectively formed so as to communicate with the air gap, the wedge hole corresponding to the vicinity of the axial end of the air gap is a wedge member inclined at a predetermined angle θ in the rotation direction. A rotating electric machine equipped. 8. A communication path which communicates between the rotor coil of each wedge member housed in the rotor coil housing portion and wedge holes formed on the opposite side, respectively, and The rotating electric machine according to any one of claims 1 to 7, wherein the communication passage (40) forms a partition at a boundary between the air supply section and the exhaust section. 9. The stator according to claim 1, wherein a partition that separates a portion corresponding to the air supply section and a portion corresponding to the exhaust section in the air gap is provided on the stator core side. The rotating electric machine as described. 10. The wedge member according to claim 1, wherein the wedge member comprises a rotor wedge and a crease block, or the rotor wedge and the crease block are formed integrally. Rotating electric machine.