JP2001211608A - Generator for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cooling performance with a simple structure. SOLUTION: This generator comprises a rotor 4 that is fixed to a rotating shaft 3 driven by the engine of a vehicle and rotated, a stator coil 6 provided in such a way as to surround the outside circumference of the rotor in a ring shape to output electric power, a easing 2 in which a ventilating inlet 2c and a ventilating outlet 2d are opened to form a ventilating patch 14 that makes the inlet communicate with the outlet inside, a suction fan 13 that sucks outside air from the inlet into the path, passes the air in the axial direction and exhausts it from the outlet outside the casing, and inside and outside protruding parts 12a, 12b that generate turbulent flows in the air passing through the path.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle generator mounted on a vehicle such as an automobile and driven by its engine, and more particularly to a vehicle generator with improved cooling performance.

[0002]

2. Description of the Related Art Generally, in a vehicle generator of this type, it is necessary to cool the electric insulation of a stator coil for generating electric power in order to prevent the electric insulation from being destroyed by high heat. In addition, if the allowable temperature of the vehicle generator is high, the current can be increased accordingly. Therefore, by increasing the cooling effect, heat generation can be suppressed, the current value can be increased, and the power generation capacity can be increased. For this purpose, various types of cooling means are conventionally provided in the vehicle generator. For example, a fan provided with a plurality of fans for ventilation (Japanese Patent Laid-Open No. 9-37519) or a fan provided with a cut-out hole in the front cover or rear cover near the end of the stator coil to provide a cooling air passage (Japanese Patent Laid-Open No. 7-274).
No. 440), a device provided with a water cooling jacket (Japanese Patent Application Laid-Open No. 10-225060), and a device in which cooling water is directly sprayed at the time of large output (Japanese Patent Application Laid-Open No. 7-298401).

[0003]

However, such a conventional vehicle generator has a low cooling effect when the engine of the vehicle is running at a low speed, or water easily enters the generator when the vehicle is washed. Therefore, there are various problems such as difficulty in maintenance and difficulty in fitting a vehicle generator in an engine room.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular generator capable of improving cooling performance with a simple configuration.

[0005]

The invention according to claim 1 is
A rotor which is fixed to a rotating shaft driven by a vehicle engine and rotates; a stator which is arranged so as to annularly surround the outer periphery of the rotor to output electric power; and at least one of which houses the stator and the rotor A casing in which a ventilation inlet and a ventilation outlet are formed at both ends in the axial direction, and a ventilation passage for communicating the ventilation inlet with the outlet is formed therein; and the ventilation passage is fixed to the rotating shaft and extends from the ventilation inlet of the casing. A suction fan that sucks outside air to allow ventilation in the axial direction and then exhausts the outside of the casing from the ventilation outlet again, and a turbulent flow in the ventilation passing through the ventilation path in the casing. A vehicular generator comprising a turbulence generating means for generating the turbulence.

According to the present invention, the outside air flows through the ventilation path in the casing, thereby cooling the stator and the rotor in the casing. In the ventilation, turbulence is generated by the turbulence generating means. . For this reason, the ventilation resistance increases, but the thermal conductivity of heat dissipation can be improved more than the increase in the ventilation resistance. For this reason, the cooling performance can be improved.

According to a second aspect of the present invention, in the stator, a coil is wound around a laminate formed by laminating a plurality of magnetic plate members.
The laminated body is fixed to the casing with at least a part of the outer peripheral surface exposed to the outside, and the turbulent flow generating means forms a part of the laminated material at a required interval in the laminating direction. The vehicular generator according to claim 1, characterized in that the vehicular generator (1) is irregularly stacked so as to project to at least one of the inner side ventilation path and the outer side (outside).

According to the present invention, since a part of the laminated material of the laminated body of the stator protrudes toward the ventilation path on the inner peripheral side of the laminated body, the ventilation passing through the ventilation path blows against these protruding portions. Turbulence is generated. For this reason, the ventilation area on the peripheral side of the laminated body is increased, and the thermal conductivity of heat dissipation can be improved.

In addition, since a part of the laminated material of the laminated body of the stator is exposed to the outside air outside the laminated body and protrudes, the efficiency of heat radiation from the outer projected portion of the laminated body to the outside air is improved. be able to. For this reason, since the heat radiation efficiency of at least one of the inner and outer circumferences of the stator laminate can be improved, the cooling performance of the laminate can be improved.

Moreover, these cooling effects can be easily obtained by simply arranging the laminated members of the laminated body in a non-uniform manner so that a part thereof projects to at least one of the inner peripheral side and the outer peripheral side. There is no inconvenience or increase in size.

According to a third aspect of the present invention, the protrusion of the laminated material projecting to at least one of the inner peripheral side and the outer peripheral side of the laminate is
3. The vehicle generator according to claim 2, wherein a notch is formed.

According to the present invention, the notches are formed in the protrusions protruding on at least one of the inner peripheral side and the outer peripheral side of the laminated body. In addition to the occurrence, the turbulence also occurs in the notch of the protruding portion, so that the ventilation area of the laminate can be further increased, and the heat conductivity of heat radiation can be improved. For this reason, the cooling performance of the vehicle generator can be improved.

According to a fourth aspect of the present invention, the rotor has a pair of an N pole and an S pole which are disposed to face each other in the axial direction of the rotation shaft. A plurality of outer claw portions projecting in the opposite direction are formed at predetermined intervals in the circumferential direction and alternately arranged so as to be inclined at a required angle with respect to the rotation axis. A vehicle generator according to any one of claims 1 to 3.

According to the present invention, since the outer peripheral claws of the pair of rotors disposed opposite to each other in the axial direction of the rotating shaft are inclined at a required angle with respect to the rotating shaft, the outer peripheral claws rotated by the rotation of the rotor. As a result, the blowing action caused by the air flow increases, and the ventilation efficiency in the casing can be improved. For this reason, the cooling performance in the casing can be improved.

[0015] The invention according to claim 5 is characterized in that a protrusion protruding into the gap is protrudingly provided on the opposing surface of the diametrically opposed rotor with a required gap left on the inner peripheral surface of the stator. A vehicle generator according to claim 1 or 4.

According to the present invention, the ventilation that flows in the axial direction blows the gap between the inner peripheral surface of the stator and the outer peripheral surface (opposing surface) of the rotor against the protrusion protruding from the outer peripheral surface of the rotor. As a result, turbulence is generated, so that the heat conductivity of heat radiation on the inner peripheral surface of the stator can be improved.

The invention according to claim 6 is the vehicle generator according to claim 5, wherein the protruding portion is formed in a blade shape.

According to the present invention, since the protrusion protruding from the rotor according to the fifth aspect of the present invention has a blade shape, the ventilation from the ventilation inlet to the outlet is achieved by the blade-shaped protrusion rotating with the rotation of the rotor. It is possible to increase the amount of wind to be blown toward. For this reason, since the ventilation efficiency in a casing can be improved, cooling performance can be improved.

The invention according to claim 7 is characterized in that the suction fan is provided outside the vicinity of the ventilation outlet of the casing, and a bell mouth guide having a bell mouth is provided at the ventilation outlet. Item 7. A vehicle generator according to any one of Items 1 to 6.

According to the present invention, the bell mouth guide having the bell mouth is provided near the ventilation outlet of the casing, and the suction fan is provided near the ventilation outlet. Ventilation sucked out of the casing through the bell mouth can be smoothly sucked outside through the bell mouth. For this reason, since the ventilation resistance sucked outside from the ventilation outlet can be reduced, the amount of the suctioned air can be increased and the ventilation efficiency can be improved. As a result, the cooling performance of the vehicle generator can be improved.

The invention according to claim 8 is the vehicle generator according to claim 7, wherein the bell mouth guide is formed integrally with the casing.

According to the present invention, since the bell mouth guide is formed integrally with the casing, the number of parts and the number of assembling steps can be reduced as compared with the case where the bell mouth guide is formed by a separate member from the casing. it can.

According to a ninth aspect of the present invention, the casing is provided with a ventilation hole communicating with the inside and outside of the casing at a portion facing the coil end of the stator coil exposed from the core of the stator. Claim 1
It is a generator for vehicles of a statement.

According to the present invention, since the ventilation passing through the inside and outside of the casing through the ventilation hole of the casing is passed through the coil end of the stator and cooled, the coil end or the stator coil can be cooled.

According to a tenth aspect of the present invention, the ventilation hole is provided with a plurality of ventilation holes located at an upper portion of the casing in use, and at least one ventilation hole located at a lower portion of the casing is provided. The vehicular generator according to claim 9, wherein an opening area is formed smaller than a total opening area of all the upper ventilation holes.

According to the present invention, when the vehicle generator is in use, the lower ventilation hole located at the lower part of the casing is, for example, one.
In addition, since the opening area of the lower ventilation hole is smaller than the total opening area of all the upper ventilation holes in addition to being smaller than the plurality of upper ventilation holes, the intake air sucked into the casing from the lower ventilation hole is reduced. The lower ventilation hole can be formed also as a drain hole.

[0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG. In these figures, the same or corresponding parts are denoted by the same reference characters.

FIG. 1 is a side sectional view of a vehicular generator 1 according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line II of FIG. 3, FIG. It is a rear view.

As shown in FIG. 1, the generator 1 for a vehicle contains a rotating shaft 3, a rotor 4, an annular field coil 5, an annular stator coil 6 and the like in a cylindrical casing 2.

The casing 2 is formed in a cylindrical shape by concentrically connecting the bottom open end of the closed cylindrical front bracket 2a shown in FIG. 3 and the bottom open end of the closed cylindrical rear bracket 2b shown in FIG. , These brackets 2a, 2b
Are provided with bearings 7a and 7b for rotatably supporting both ends of the rotating shaft 3 respectively.

A pulley 8 is fixed to the outer end of the rotating shaft 3 projecting outward from the front bracket 2a. The other end of a transmission belt such as a V-belt (not shown) wound around the pulley 8 is fixed. The part is wound around a pulley or the like of a crankshaft of a vehicle engine, and the rotating shaft 3 is driven by the vehicle engine.
Are driven to rotate about the axis.

A rotor 4 is concentrically fixed to an outer periphery of an intermediate portion of the rotating shaft 3 housed in the casing 2 in the axial direction. As shown in FIG. 2, the rotor 4 includes an N-pole rotor 9 and an S-pole rotor 10 facing each other at a predetermined interval in the axial direction of the rotating shaft 3. These N and S pole rotors 9, 10 are disc-shaped main bodies 9 fixed to the rotating shaft 3.
A plurality of tapered outer peripheral claws 4a are provided on the inner surfaces (opposing surfaces) of the outer peripheral portions a and 10a in the vertical direction at predetermined intervals in the circumferential direction. Part 4
In a, the N and S poles are alternately arranged in the circumferential direction with a required gap.

As shown in FIG. 1, these rotors 9, 10
An annular field coil 5 is provided inside the outer peripheral claw portion 4a.
The field coils 5 excite the outer peripheral claws 4a of the rotors 9 and 10 to N and S poles, respectively. The field coil 5 is fixed to, for example, the rear bracket 2b, and is electrically connected to a vehicle battery (not shown) or a power supply circuit of an electric compressor of a vehicle refrigeration apparatus via a power receiving coil 11 to receive power. ing.

On the other hand, the stator coil 6 is wound around the both ends in the axial direction of a laminated core 12 which is a laminated body surrounding the outer peripheral surface of each outer peripheral claw portion 4a of the rotor 4 at a predetermined gap in the diametric direction. Fixed. The laminated core 12 is formed by, for example, axially laminating silicon steel thin plates as a plurality of annular laminated materials, and at least a part of the outer peripheral surface of the laminated core 12 is exposed to the outside air.

Then, as shown in FIG. 5, these thin plates are laminated in a state of being shifted in the radial direction so as to slightly project toward the inner peripheral side and the outer peripheral side at a required interval in the axial direction. A plurality of inner protrusions 12a and outer protrusions 12b, which are turbulence generating means, are formed.

As shown in FIG. 1, a suction fan 13 having a diameter larger than that of the pulley 8 is concentrically fixed to the outer surface of the pulley 8 on the front bracket 2a side. Further, as shown in FIGS. 3 and 4, each of the front bracket 2a and the rear bracket 2b has a plurality of ventilation openings 2c.
And a ventilation outlet 2d, respectively.
1 and a plurality of ventilation paths 14 for communicating the ventilation outlets 2d with each other are formed in the space inside the casing 2 as shown by dots in FIG. 1 to allow outside air to flow through the casing 2 as shown by arrows in FIG. After cooling, the air is exhausted again.

Further, a bell mouth 15 is formed in the ventilation outlet 2d of the front bracket 2a so that the ventilation in the casing 2 is smoothly exhausted to the outside air. The bell mouth 15 may be integrally formed with the front bracket 2a, or a bell mouth guide (not shown) forming the bell mouth 15 may be formed separately from the front bracket 2a, and the front guide may be connected to the front bracket 2a.
You may be comprised so that it may be attached to.

Next, the operation of the vehicle generator 1 will be described.

When an exciting current is supplied from a battery of a vehicle (not shown) to the field coil 5 of the vehicle generator 1, the field coil 5 causes the pair of rotors 9 and 1 to rotate.
0 are excited to the N pole and the S pole, respectively. In this state, when the driving force from the engine is transmitted to the pulley 8 via a V-belt or the like, the rotating shaft 3 rotates, and at the same time, the outer peripheral claws 4a of the pair of N and S pole rotors 9 and 10.
However, since the rotor rotates inside the stator coil 6, the magnetic flux between the pair of N and S pole rotors 9 and 10 is relatively linked by the stator coil 6. For this reason, an electromotive force is induced in the stator coil 6.

At this time, the suction fan 13 rotates together with the pulley 8, so that the air in the casing 2
As shown by the middle arrow, the air is sucked and exhausted from the ventilation outlet 2d to the outside, so that the inside of the casing 2 has a negative pressure. For this reason, the outside air behind the rear bracket 2b is
Is sucked into the ventilation passage 14 in the casing 2 and further ventilates toward the ventilation outlet 2d.

When this ventilation passes through the ventilation passage 14 in the annular gap between the outer peripheral surface of each outer claw portion 4a of the rotor 4 and the inner peripheral surface of the laminated core 12 of the stator coil 6, as shown by the arrow in FIG. The air blows against the inner protruding portions 12a to generate turbulent flow, and the surface area of the laminated iron core 12 where the air comes into contact with the inner peripheral surface increases. Therefore, the heat radiation efficiency of the laminated core 12 can be improved, and the cooling performance can be improved.

Further, since the outer peripheral surface of the laminated core 12 is exposed to the outside air and a plurality of outer projecting portions 12b are projected to the outside air, the outer exposed surface area of the laminated core 12 is increased, and Blows against each outer protruding portion 12b to generate turbulent flow. Therefore, the heat radiation efficiency of the laminated core 12 can be improved, and the cooling performance can be improved.

Further, the ventilation outlet 2 near the suction fan 13
Since the bell mouth 15 is formed in d, the casing 2
It is possible to reduce the ventilation resistance when the inside air passes through the ventilation outlet 2d. For this reason, the ventilation efficiency by which the ventilation in the casing 2 by the suction fan 13 is sucked out and exhausted can be improved, and the cooling performance by the ventilation in the casing 2 can be improved.

FIGS. 6A and 6B are front views of main parts of an inner protruding portion 12c and an outer protruding portion 12d according to a second embodiment of the present invention. These inner and outer protrusions 12c, 12d
Are provided with a plurality of notches 12e and 12f in the circumferential direction at the inner peripheral edge of the inner protruding portion 12a and the outer peripheral edge of the outer protruding portion 12b of the laminated core 12 shown in FIG. The feature is that it is formed at intervals. These notches 12e and 12f may be projections, and their shapes may be arbitrary.

According to the inner and outer protruding portions 12c and 12d, turbulent airflow can be generated by projecting inward and outward, and the notches 12e and 12d
Since turbulence can be further generated in the ventilation by f, the heat radiation efficiency of the laminated core 12 due to the turbulence can be improved, and the cooling performance can be improved.

FIG. 7B is a plan view of a main part of the outer peripheral claw 4b of the pair of N and S pole rotors 9 and 10 according to the third embodiment of the present invention. The axial center axis O of the outer claw portions 4a, 4a of the rotors 9, 10 according to the first embodiment shown in FIG.
As shown in FIG. 7A, a and Ob are substantially parallel to the rotation center axis Oo of each of the rotors 9 and 10, however, the outer peripheral claws 4b and 4b according to the third embodiment are different from each other. 9,
The outer peripheral claw portions 4b, 4b are formed so as to be inclined at a required angle θ with respect to the rotation center axis Oo.
It is characterized in that the surrounding air is blown to the air outlet 2d side by the rotation of b.

Therefore, the rotation of the outer peripheral claws 4b allows the surrounding air to be blown to the air outlet 2d side, so that the airflow efficiency in the casing 2 can be improved. For this reason, the cooling performance by the ventilation in the casing 2 can be further improved.

FIG. 8 is an enlarged side view of a main part of the outer peripheral claws 4c of each rotor 9, 10 according to the fourth embodiment of the present invention.
FIG. 9 is a plan view thereof. Each of the outer claw portions 4c has an arcuate blade 16 standing upright on the outer peripheral surface of the outer claw portion 4a along the longitudinal direction. It is characterized in that it is configured to blow air to the 2d side.

Accordingly, the rotation of the outer claw portions 4c causes the ventilation to pass through the ventilation passage 14 in the annular gap between the outer peripheral surface of the outer peripheral claw portions 4c and the inner peripheral surface of the laminated iron core 12 toward the ventilation inlet 2d. Since the air can be blown, the ventilation efficiency in the casing 2 can be improved, and the cooling performance can be improved. The blade 16 may be provided instead of the inner protruding portion 12a shown in FIG. 5, or may be provided together with the inner protruding portion 12a.

FIG. 10 is an enlarged side view of a main part of each outer claw portion 4d according to a fifth embodiment of the present invention, and FIG. 11 is a plan view thereof. These outer peripheral claw portions 4d have, for example, a plurality of spherical projections 17 on the outer peripheral surface thereof in place of the blades 16 shown in FIGS. It is characterized in that it is arranged so that turbulence is generated in the surrounding ventilation and air is blown to the ventilation outlet 2d side.

Therefore, even with these outer claw portions 4d, the rotation of these outer claw portions 4d allows the ventilation to pass through the ventilation passage 14 in the annular gap between the outer peripheral surface of these outer claw portions 4c and the inner peripheral surface of the laminated core 12. To generate turbulence in the core 1
2 and the ventilation can be blown to the ventilation outlet 2d side, so that the ventilation efficiency in the casing 2 can be improved and the cooling performance can be improved.

FIG. 12 is a longitudinal sectional view of a main part of a laminated core 12g of a stator coil 6 according to a sixth embodiment of the present invention. The laminated core 12g has the tip of the micro heat pipe 18 inserted and fixed in the axial direction from one axial end to the other end of the laminated core 12 according to the first embodiment. It is characterized in that the end portion is configured to protrude inside the ventilation path 14 or outside the casing 2.

Therefore, according to this embodiment, the inside of the casing 2 can be cooled by the ventilation of the outside air as described above, while the micro heat pipe 18
It is possible to locally cool not only the entire laminated core 12g but also a portion having a high heat generation density. In addition, the cooling temperature of the laminated core 12g can be appropriately controlled by changing the working fluid in the micro heat pipe 18, the internal pressure of the pipe, and the like.

The micro heat pipe 18 may be provided together with the above embodiments, or may be provided independently.

FIG. 13 is a longitudinal sectional view of a main part of a laminated core 12h according to a seventh embodiment of the present invention. This laminated core 12
h is that the outer protruding portion 12b of the laminated core 12 according to the first embodiment is deleted, and a flat micro heat pipe 19 is wound around the outer circumferential surface a plurality of times in the axial direction and fixed, for example. There are features.

Therefore, according to this embodiment, as described above, the inside of the casing 2 can be cooled by the ventilation of the outside air, while the flat micro heat pipe 19 not only covers the outer peripheral surface of the laminated iron core 12h but also the whole thereof. It can be cooled efficiently. In addition, the cooling temperature of the laminated core 12g can be appropriately controlled by changing the working fluid in the micro heat pipe 19, the internal pressure of the pipe, and the like.

FIG. 14 is a side sectional view of a vehicle generator 1A according to an eighth embodiment of the present invention. This vehicle generator 1
A indicates that instead of the inner and outer protruding portions 12a and 12b of the laminated core 12 according to the first embodiment, a coolant such as cooling water is directly applied to the outer peripheral surface of the exposed portion of the laminated core 12 exposed to the outside air. A cooling device 20 for dropping and cooling the laminated core 12
The feature is that it is provided.

The cooling device 20 is, for example, a water supply head 20a for dropping or supplying cooling water such as a low-temperature drain from an air conditioner or refrigeration device for a vehicle (not shown) to the outer peripheral surface of the laminated iron core 12, and the water supply head 20a And a flow control valve 20c for controlling the flow rate of supplying water to the water supply head 20a.

Therefore, according to the vehicle generator 1A, the inside of the casing 2 can be cooled by the ventilation of the outside air as described above, while the low-temperature drain water or the like dripped on the outer peripheral surface of the laminated iron core 12 can be cooled. Laminated core 12 with cooling water
Can be effectively cooled. Moreover, the laminated core 12
The cooling temperature of the laminated core 12 can be appropriately controlled by controlling the temperature and flow rate of the cooling water dropped on the outer peripheral surface of the laminated core. When drain water such as a refrigerating device is used as the cooling water, a device for separately producing the cooling water is not required, so that the configuration can be simplified and the cost can be reduced. The flow control valve 20c may be omitted by setting the diameter of the pipe 20b in advance according to the required flow rate of the cooling water.

FIG. 15 is a side sectional view of a vehicle generator 1B according to a ninth embodiment of the present invention. This vehicle generator 1
B is a first blowing nozzle 21 for directly blowing cooling air to an outer peripheral surface of an exposed portion of the laminated core 12 exposed to the outside air;
It is characterized in that a second blowing nozzle 22 for blowing cooling air from outside is provided in the vicinity of the ventilation inlet 2c.

The first and second blowing nozzles 21 and 22
Are provided with first and second blower tubes 21a and 21b for blowing cooling air.
2a, while the blower tubes 21a, 2a
2a is provided with first and second air volume control valves 2 for controlling the air volume.
1b and 22b are interposed respectively. As the cooling air, for example, a part of the cooling air in the refrigerator of a vehicle refrigeration apparatus (not shown) may be used. Further, the first and second blower tubes 21a and 21b are connected to one, and the first and second blower tubes 21a and 21b are connected.
Both or one of the air volume control valves 21b and 22b may be omitted.

According to the vehicle generator 1 B, the cooling air is directly blown to the outer peripheral surface of the laminated core 12 by the first blowing nozzle 21 to be cooled, while the front bracket 2 a
The stator coil 6 can be cooled by blowing to the stator coil 6 through the ventilation hole 2e formed in the rear bracket 2b and the ventilation hole 2f formed in the rear bracket 2b.

Since the cooling air is blown from the second blowing nozzle 22 to the vicinity of the ventilation inlet 2c, the cooling air is introduced into the casing 2 from the ventilation inlet 2c, and
The laminated core 12 and the field coil 5 can be efficiently cooled by the ventilation. Moreover, by controlling the temperature and the amount of the cooling air, the cooling temperature of the laminated iron core 12, the field coil 5, and the like can be appropriately controlled.

FIG. 16 is a schematic configuration diagram showing an example of a case where the vehicle generator 1C according to the tenth embodiment of the present invention is mounted on a refrigerator car 23. That is, the freezer truck 23 is provided with a vehicle generator 1C on an outer surface, for example, an outer bottom surface of a container 24 configured as a freezer or refrigerator by a refrigerating device (not shown).
Is characterized in that the vehicle generator 1C is cooled by the traveling wind when the refrigerating vehicle 23 travels.

That is, the configuration of the vehicle generator 1C itself may be any of the vehicle generators according to the above-described embodiments or any of the conventional vehicle generators. These vehicle generators are generally provided in the engine room. In this embodiment, a pulley 28 is provided in the middle of a propeller shaft 27 that transmits the rotational force of an engine (not shown) disposed in the engine room 25 to the rear wheel 26.
By winding the other end of a transmission belt such as a V belt wound around the pulley 8 of the vehicle generator 1C around the pulley 8, the rotating shaft 3 of the vehicle generator 1C is rotated by the propeller shaft 27. It has become.

Therefore, according to the vehicular generator 1C, since it is not disposed in the engine room 25 as in the conventional example, but is disposed in a state of being exposed to the outside air, it can be used when the refrigerating vehicle 23 travels. The vehicle wind generator 1C can be cooled by the traveling wind. Note that the vehicle generator 1C does not need to be disposed on the outer bottom surface of the container 24, and may be disposed at a location where the traveling wind is received. Further, the vehicle generator 1
The attachment of C to the freezing car 23 may be detachable, and according to this, maintenance and inspection can be performed by removing the vehicle generator 1C from the freezing car 23, and the ease of maintenance can be improved. Further, in the above embodiment, the case where the rotational force of the propeller shaft 27 is transmitted to the vehicle generator 1C by a transmission belt such as a V-belt, but the rotational force of the propeller shaft 27 is transmitted by a gear train instead of the transmission belt. You may comprise so that it may transmit to the generator 1C for vehicles.

FIG. 17 is a side sectional view of a vehicle generator 1D according to an eleventh embodiment of the present invention, and FIG. 18 is an XVI of FIG.
It is an end elevation of a II-XVIII line cutting part. The vehicle generator 1D includes a plurality of inner and outer protrusions 12a and 12b provided on a laminated iron core 12, which is a turbulence generating means of the vehicle generator 1 according to the first embodiment of the present invention shown in FIG. Instead of
It is characterized in that a plurality of ventilation holes 31 are formed in the front bracket 2a of the casing 2.

That is, as shown in FIG. 17, in the vehicle generator 1D, the stator coil 6 has left and right portions projecting in the axial direction (left and right directions in FIG. 17) from both axial ends of the laminated core 12 which is the core of the stator. A pair of annular coil ends 6a and 6b are formed.
a, 6b, for example, the front bracket 2 facing the outer peripheral surface of the coil end 6a on the right side in FIG.
A plurality of ventilation holes 31 penetrating the inside and outside of the front bracket 2a are formed at the opposing portion of FIG.

As shown in FIG. 18, a plurality of upper ventilation holes 31a, 31a are formed at the upper part of the front bracket 2a located at the upper part in the use state of the vehicle generator 1D.
a and 31a are arranged at predetermined intervals in the circumferential direction, while one lower ventilation hole 31b is arranged at least at the lowermost part of the front bracket 2a. By making the total opening area of the upper vents 31a, 31a, 31a larger than the opening area of the lower vent 31b, the amount of outside air sucked into the front bracket 2a from the lower vent 31b is reduced. The lower ventilation hole 31b is configured to be able to double as a drainage hole for draining the water in the front bracket 2a to the outside.

Therefore, according to the vehicle generator 1 D, the rotation of the suction fan 13 causes the front bracket 2 to rotate.
Outside air is sucked into the front bracket 2a through the upper and lower ventilation holes 31a, 31b, and the air can be directly cooled when passing through the outer peripheral surface of the coil end 6a. For this reason, the whole stator coil 6 can be efficiently cooled.

FIG. 19 is a model diagram showing a new finding on the heat balance in this type of vehicle generator A. That is, the temperature of the stator coil 6 becomes the highest during the operation of the vehicle generator A. For example, when the total cooling heat of the vehicle generator A is 1, as shown in FIG. The heat transfer amount Qa for transferring heat to the ventilation passing through the casing 2 is 0.41, the heat transfer Qb for transferring the heat of the stator coil 6 from the coil ends 6a and 6b to the same ventilation is 0.40, and the laminated core 12
The amount of heat transferred by natural convection from the outer surface to the outside air is 0.
It becomes 19.

However, at this time, the amount Qd of heat transferred from the stator coil 6 to the laminated core 12 is equivalent to 0.49, and Qa + Qc = 0.
It can be seen that it occupies most of 60. From this, the main heat source of the vehicle generator 1D is the stator coil 6, and the cooling mechanism of the stator coil 6 includes direct cooling at the coil ends 6a and 6b by the ventilation of the ventilation holes 31, It can be said that there is indirect cooling through heat conduction to the laminated core 12.

For these direct and indirect cooling mechanisms, the cooling effect can be improved by increasing the amount of air flow by the suction fan 13, but in order to further improve the cooling efficiency, the maximum heat generation is required. It is effective to increase the cooling efficiency of the coil ends 6a, 6b, which are exposed portions of the stator coil 6, which is the portion. That is, the laminated core 1
Coil end 6 for simply connecting the two slots with the shortest
It has been found that the cooling efficiency of the vehicular generator can be improved by positively providing the a, 6b with a function as a radiator.

Therefore, according to the vehicle generator 1D, the coil end 6a of the stator coil 6 is directly cooled by the ventilation passing through the plurality of ventilation holes 31 of the front bracket 2a. 6 can be cooled with high efficiency, and the power generation efficiency can be improved.

Next, various embodiments of the present invention based on the above findings will be described with reference to FIGS. The following embodiments may be configured together with any of the first to eleventh embodiments, or may be configured independently irrespective of these embodiments.

FIG. 20 is an enlarged view of a main part of a vehicle generator 1E according to a twelfth embodiment of the present invention. This vehicle generator 1E is characterized in that a pair of left and right coil ends 6a and 6b of the stator coil 6 are improved 6c. In the improved coil end 6c, the coils of the coil end 6c are not bundled in a bundle so as to be as large as possible so that the outer surface area is as large as possible, and the coils are spread out on a plane.

Therefore, according to the vehicle generator 1E, since the outer surface area of the coil end 6c of the stator coil 6, which becomes the highest temperature during operation, increases, the cooling of the coil end 6c cooled by the ventilation in the casing 2 is performed. The effect can be improved.

FIG. 21 is a schematic diagram of a main part of a vehicle generator 1F according to a thirteenth embodiment of the present invention. In this vehicle generator 1F, a pair of coil ends 6d, 6d of the stator coil 6 projecting outward (left and right directions in FIG. 21) from both ends in the axial direction of the laminated iron core 12 serving as a stator core is determined by the amount of outward projection. The casing 2
The exposed area exposed inside is increased to increase the coil end 6d,
The feature is that the cooling efficiency of 6d is improved.

Then, for example, each of these coil ends 6d
Is more than １ ／ of the thickness t of the laminated core 12 (l ≧
t / 2).

Therefore, according to the vehicular generator 1F, the coil end 6d is exposed to the outside from the laminated core 12 and cooled by the ventilation in the casing 2, so that the exposed area of the coil end 6d is increased. It is possible to improve the cooling efficiency by ventilation of the entire stator coil 6d or 6d.

FIG. 22 is a schematic diagram of a main part of a vehicle generator 1G according to a fourteenth embodiment of the present invention. This vehicle generator 1G includes a pair of coil ends 6e, 6e of the stator coil 6.
The characteristic feature is that e increases the amount of protrusion from the laminated iron core 12 outward in the axial direction and is bent toward the outer peripheral side so as not to interfere with the rotation of the rotor 4.

Therefore, according to this vehicle generator 1G, the amount of protrusion protruding outward from laminated iron core 12 is increased, and the exposed area of a pair of coil ends 6e, 6e cooled by ventilation in casing 2 is increased. Because
The cooling efficiency of the coil ends 6e, 6e and the entire stator coil 6 can be improved.

FIG. 23 is a schematic diagram of a main part of a vehicle generator 1H according to a fifteenth embodiment of the present invention. The vehicle generator 1H includes a pair of coil ends 6f, 6f of the stator coil 6.
is characterized in that a plurality of radiation fins 32, 32,.

Therefore, according to the vehicle generator 1H, the heat radiation area is increased by the plurality of radiation fins 32, 32,... Attached to the coil ends 6f, 6f. Coil 6
The overall cooling efficiency can be improved.

FIG. 24 is a schematic diagram of a main part of a vehicle generator 1I according to a sixteenth embodiment of the present invention. The vehicle generator 1I is connected to one side of the coil end 6g, for example, the suction fan 13
It is characterized in that an annular cooling heat pipe 33 is closely fitted inside the inner periphery of the annular one end on the side (the right end side in FIG. 24).

That is, the end of the heat pipe 33 is formed, for example, in an annular portion 33a.
a is tightly fitted inside the inner peripheral surfaces of the pair of upper and lower coil ends 6g, and the outer peripheral surface of the annular portion 33a is brought into close contact with the inner peripheral surface of the annular right end of the coil end 6g over the entire length.

Therefore, according to the vehicle generator 1I, the heat generated by the stator coil 6 is absorbed by one end of the coil end 6g and cooled by the annular portion 33a of the cooling heat pipe 33. The cooling efficiency of the coil 6 can be improved.

In the heat pipe 33, the annular portion 33a may be formed as an annular portion 33b fitted to the outer periphery of the annular one end of the coil end 6g as shown in FIG. The cooling efficiency of the end 6g or the stator coil 6 may be improved.

FIG. 26 is a schematic view of a main part of a vehicle generator 1J according to a seventeenth embodiment of the present invention, and FIG. 27 is a longitudinal sectional view of the main part.

In this vehicle generator 1J, a ventilation path 34 is formed in the laminated core 12 on one side of the stator coil 6 (FIGS. 26 and 25).
(The outer peripheral side) is formed over the entire length of the laminated core 12.

That is, as shown in FIG.
Has a cross-sectional shape of, for example, a semicircle. The stator coil 6 is inserted between one surface (the upper surface in FIG. 27) of the slot 35 of the laminated core 12 into which the stator coil 6 is inserted and one surface (the same upper surface) of the stator coil 6. 6 is formed over the entire length of the laminated core 12 along a part of the outer peripheral surface of the laminated core 12. At both ends in the axial direction of the laminated core 12, an inlet 34 a and an outlet 34 b of the ventilation path 34 are formed, respectively.

Therefore, according to the vehicle generator 1J, part of the outside air sucked into the casing 2 by the rotation of the suction fan 13 is sucked into the inside of the ventilation passage 34 from the inlet 34a of the ventilation passage 34, and By passing through the entire length, a part of the outer peripheral surface of the stator coil 6 in the laminated core 12 is directly cooled and discharged into the casing 2 from the outlet 34b. Therefore, since the stator coil 6 is directly cooled by the ventilation, the cooling efficiency of the stator coil 6 can be improved.

FIG. 28 is a schematic diagram of a main part of a vehicle generator 1K according to an eighteenth embodiment of the present invention. The vehicle generator 1K is a ventilation passage 34 of the vehicle generator 1J shown in FIG.
A communication path 36 communicating from the vertical direction is formed in the laminated core 12 in the radial direction at an intermediate portion in the axial direction, and an inlet 36 a of the communication path 36 is opened at the outer surface of the laminated core 12. There is a feature.

According to the vehicle generator 1K, the outside air is sucked into the communication passage 36 from the inlet 36a of the communication passage 36 by the rotation of the suction fan 13, and the amount of air passing through the air passage 34 for cooling the stator coil 6 is provided. Therefore, the cooling efficiency of the stator coil 6 can be further improved.

FIG. 29 is a schematic diagram of a main part of a vehicle generator 1L according to a nineteenth embodiment of the present invention. The vehicle generator 1L is a ventilation passage 34 of the vehicle generator 1J shown in FIG.
It is characterized in that a cooling heat pipe 37 is densely inserted into the inside of the housing to forcibly directly cool the stator coil 6.

FIG. 30 is a schematic diagram of a main part of a vehicle generator 1M according to a twentieth embodiment of the present invention. In the vehicle generator 1M, the annular laminated core 12 is divided into a plurality of parts in the axial direction, for example, divided into two parts 12a and 12b.
An annular gap 38 having a required width is formed on the entire circumference of the laminated iron core 12 between the opposed ends of the coil 2b, and the outer end 38a of the annular gap 38 is opened to the outside air, while the inner end 38b is connected to the stator coil 6.
Is characterized in that it communicates with the outer peripheral surface of the. The number of divisions of the laminated core 12 may be, for example, any of 3, 4, 5, 6, 7, and 8.

Therefore, according to the vehicular generator 1M, the axially intermediate portion of the stator coil 6 is connected to the annular gap 38.
As a result, the heat radiation surface to the outside air is formed by direct exposure to the outside air, so that the cooling efficiency of the stator coil 6 can be improved.

FIG. 31 is a schematic diagram of a main part of a vehicle generator 1N according to a twenty-first embodiment of the present invention. In this vehicle generator 1N, in the vehicle generator according to any one of Embodiments 1 to 1M, a required gap is provided by a cylindrical outer cylinder 39 on the outer periphery of an outer peripheral surface exposed portion of the laminated core 12 exposed to the outside air. It is characterized in that an annular outside air flow path 39 is formed to cover the exposed portion of the outer peripheral surface of the laminated core 12 with a required gap by covering.

The annular outside air passage 39 has an inlet 39a opening at one end of the casing 2 on the outside air inlet side, and an outlet 39b opening at an upstream side near the suction fan 13.

Therefore, when the suction fan 13 rotates, the outlet 39b side of the outside air passage 39 which is open near the upstream of the suction fan 13 has a lower pressure than the inlet 39a, so that the outside air flows from the inlet 39a through the outside air passage. When the air is sucked into the inside 39 and flows through the outside air passage 39, the exposed outer peripheral surface of the laminated core 12 is directly ventilated and cooled, and is exhausted from the outlet 39b.

For this reason, since the laminated core 12 can be directly cooled by forced convection of the outside air, the cooling efficiency can be improved as compared with the case where the laminated core 12 is cooled by the natural convection of the outside air. For this reason, it is possible to improve the cooling efficiency of the stator coil 6 that is cooled through the laminated iron core 12.

FIG. 32 is a longitudinal sectional view of a vehicle generator 1P according to a twenty-second embodiment of the present invention. This vehicle generator 1
P is a double rotor 4c, 4d in which the rotor 4 of the vehicle generator 1 shown in FIG.
The annular laminated core 12 is divided into a plurality of parts in the axial direction, for example, divided into two parts 12c and 12d. There are features. The number of divisions is 3,
Any of 4, 5, 6, 7, and 8 may be used.

According to the vehicular generator 1P, FIG.
0, the outer peripheral surface of the axially intermediate portion of the stator coil 6 is exposed to the outside air by the annular gap 41 of the laminated iron core 12 in substantially the same manner as the vehicle generator 1M, thereby improving the cooling efficiency of the stator coil 6. be able to.

An annular heat pipe 42 for cooling may be fitted into the annular gap 41 so as to directly contact the outer peripheral surface of the stator coil 6. Efficiency can be improved.

FIG. 33 is a schematic diagram of a main part of a vehicle generator 1Q according to a twenty-second embodiment of the present invention. This vehicle generator 1Q relates to an improvement of a double rotor type vehicle generator such as the vehicle generator 1P shown in FIG. 32, and is adjacent to each other in the circumferential direction of the pair of left and right rotors 4c and 4d. The plurality of groove channels 42 formed by the gaps between the outer peripheral claws 4a are separated from each other by a pair of left and right rotors 4c and 4d so that the flow channel resistance of the ventilation passing through the respective groove channels 42 is reduced. The feature is that the position of the claw 4a is shifted in the circumferential direction between the rotors 4c and 4d.

That is, in this double-rotor type vehicle generator 1Q, the rotation of the double rotors 4c and 4d causes the ventilation flow in each groove channel 42 in the suction direction of the suction fan 13 as indicated by the arrow in the drawing. And the opposite direction (reverse wind) is generated. Therefore, the groove flow path 42a through which the forward wind passes in the suction direction of the suction fan 13 is substantially linear between the pair of left and right rotors 4c and 4d. 33, while the reverse wind in the suction direction passes (FIG. 33).
Regarding the groove flow path 42b of the rotor 4d (middle left), the outer circumferential claws 4a of the left and right rotors 4c, 4d are blown against the trapezoidal bottom of the trapezoidal outer circumferential claws 4a of the other (right side in FIG. 33) rotor 4c. The arrangement is shifted in the circumferential direction.

For this reason, the ventilation resistance of the draft (forward wind) flowing in the suction direction of the suction fan 13 can be reduced, while the ventilation resistance of the reverse wind flowing in the opposite direction can be increased. It is possible to increase the suction air flow, that is, the air flow inside the casing 2. Therefore, the laminated core 1 cooled by the ventilation
2 and the efficiency of cooling the stator coil 6 can be improved.

[0108]

As described above, according to the present invention, a means for generating a turbulent flow in the ventilation passing through the ventilation passage in the casing is provided, so that the outside air flows through the ventilation passage in the casing. However, since the stator and the rotor in the casing can be cooled, and the turbulence is generated by the turbulence generating means in the ventilation, the ventilation resistance increases. Thermal conductivity can be improved. For this reason, the cooling performance can be improved.

Further, since the ventilation that passes through the inside and outside of the casing through the ventilation hole of the casing directly cools the coil end of the stator, the coil end can be effectively cooled.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a vehicular generator according to a first embodiment of the present invention, and is a sectional view taken along line II of FIG.

FIG. 2 is a partially enlarged perspective view of a pair of N and S pole rotors of FIG. 1;

FIG. 3 is a front view of the vehicle generator shown in FIG. 1;

FIG. 4 is a rear view of the vehicle generator shown in FIG. 1;

FIG. 5 is an enlarged view of a main part of the vehicle generator of FIG. 1;

FIG. 6A is an enlarged front view of a main portion of an inside protruding portion of a vehicle generator according to a second embodiment of the present invention, and FIG. 6B is an enlarged front view of a main portion of the outside protruding portion.

7 (A) is a plan view of a part of an outer peripheral claw portion of the rotor shown in FIG. 2, and FIG. 7 (B) is an example of an outer peripheral claw portion of the rotor of the vehicle generator according to the third embodiment of the present invention. FIG.

FIG. 8 is a side view of an outer peripheral claw portion of a rotor of a vehicle generator according to a fourth embodiment of the present invention.

FIG. 9 is a plan view of the outer peripheral claw shown in FIG. 8;

FIG. 10 is a side view of an outer peripheral claw portion of a rotor of a vehicle generator according to a fifth embodiment of the present invention.

FIG. 11 is a plan view of the outer peripheral claw shown in FIG. 10;

FIG. 12 is an enlarged view of a main part of a laminated core of a vehicle generator according to a sixth embodiment of the present invention.

FIG. 13 is an enlarged view of a main part of a laminated core of a vehicle generator according to a seventh embodiment of the present invention.

FIG. 14 is a side sectional view of a vehicle generator according to an eighth embodiment of the present invention.

FIG. 15 is a side sectional view of a vehicle generator according to a ninth embodiment of the present invention.

FIG. 16 is a schematic configuration diagram in a case where a vehicle generator according to a tenth embodiment of the present invention is applied to a refrigerating vehicle.

FIG. 17 is a side sectional view of a vehicle generator according to an eleventh embodiment of the present invention.

FIG. 18 is an end view of a section taken along line XVIII-XVIII of FIG. 17;

FIG. 19 is a model diagram showing new knowledge about heat balance in this type of vehicle generator.

FIG. 20 is an enlarged view of a main part of a vehicle generator according to a twelfth embodiment of the present invention.

FIG. 21 is a schematic diagram of a main part of a vehicle generator according to a thirteenth embodiment of the present invention.

FIG. 22 is a schematic diagram of a main part of a vehicle generator according to a fourteenth embodiment of the present invention.

FIG. 23 is a schematic diagram of a main part of a vehicle generator according to a fifteenth embodiment of the present invention.

FIG. 24 is a schematic view of a main part of a vehicle generator according to a sixteenth embodiment of the present invention.

FIG. 25 is a schematic diagram of a main part of a vehicle generator according to a modification of the sixteenth embodiment of the present invention.

FIG. 26 is a schematic view of a main part of a vehicular generator according to a seventeenth embodiment of the present invention.

FIG. 27 is a longitudinal sectional view of a main part of a vehicular generator according to a seventeenth embodiment of the present invention.

FIG. 28 is a schematic diagram of a main part of a vehicle generator according to an eighteenth embodiment of the present invention.

FIG. 29 is a schematic view of a main part of a vehicle generator according to a nineteenth embodiment of the present invention.

FIG. 30 is a schematic view of a main part of a vehicle generator according to a twentieth embodiment of the present invention.

FIG. 31 is a schematic view of a main part of a vehicle generator according to a twenty-first embodiment of the present invention.

FIG. 32 is a longitudinal sectional view of a vehicle generator according to a twenty-second embodiment of the present invention.

FIG. 33 is a schematic view of a main part of a vehicle generator according to a twenty-second embodiment of the present invention.

[Explanation of symbols]

1,1A, 1B, 1C, 1D, 1E, 1F, 1G, 1
H, 1I, 1J, 1K, 1L, 1M, 1N, 1P, 1Q
Vehicle generator 2 Casing 2a Front bracket 2b Rear bracket 3 Rotating shaft 4 Rotor 4a Rotor outer claw 5 Field coil 6 Stator coil 6a, 6b, 6c, 6d, 6e, 6f, 6g Coil end 9 N pole rotor 9a N Main body of pole rotor 10 Main body of S pole rotor 10a Main body of S pole rotor 12 Laminated iron core 12a Inside projection 12b Outside projection 13 Suction fan 14 Ventilation path 15 Bell mouth 16 Blade 17 Spherical projection 18 Micro heat pipe 19 Flat micro heat pipe 20 Cooling device 20a Water supply head 21 First blow nozzle 22 Second blow nozzle 31 Vent 31a Upper vent 31b Lower vent 34 Ventilation path 36 Communication path 37, 42 Heat pipe for cooling 38, 41 Annular gap 39 Outer cylinder 40 Outside air flow path

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshihiko Saito 336 Tatehara, Fuji-shi, Shizuoka Toshiba Carrier Co., Ltd.F-term (reference) RR16 RR20 RR21 RR24 RR27 RR35 RR37 RR38 RR39 RR40 RR42 RR43 RR44 RR59 RR63 RR68 RR69 RR73 SS04 SS21

Claims (10)

[Claims] 1. A rotor which is fixed to a rotating shaft driven by an engine of a vehicle and rotates, a stator which is arranged so as to annularly surround an outer periphery of the rotor and outputs electric power,
A casing in which at least the stator and the rotor are accommodated, a ventilation inlet and a ventilation outlet are formed at both ends in the axial direction, and a ventilation passage for communicating the ventilation inlet with the outlet is formed inside; a casing fixed to the rotating shaft; A suction fan that sucks outside air from the ventilation inlet of the casing to the ventilation path to allow ventilation in the axial direction, and then exhausts the air again from the ventilation outlet to the outside of the casing. A turbulence generating means for generating a turbulent flow in the ventilation passing through the ventilation path. 2. A stator, wherein a coil is wound around a laminated body formed by laminating a plurality of magnetic plate members, and the stator is fixed to a casing with at least a part of an outer peripheral surface of the laminated body being exposed to the outside. The flow generating means may be formed by laminating a part of the laminated material irregularly so as to protrude at least one of an inner ventilation path and an outer peripheral side at a predetermined interval in the laminating direction. The vehicle generator according to claim 1, wherein: 3. The vehicular generator according to claim 2, wherein a notch is formed in a protruding portion of the laminated material protruding at least one of an inner peripheral side and an outer peripheral side of the laminated body. 4. The rotor has a pair of N pole and S pole opposed to each other in the axial direction of the rotation shaft, and a plurality of S poles and N poles protruding in the facing direction at the outer peripheral portion of each rotor. The outer peripheral claws are formed at predetermined intervals in the circumferential direction and are alternately opposed to each other, and the outer peripheral claws are inclined at a required angle with respect to the rotation axis. A vehicle generator according to any one of the preceding claims. 5. A projection protruding into the gap is protruded from an opposing surface of a diametrically opposed rotor with a predetermined gap provided on an inner peripheral surface of the stator.
A vehicle generator according to any of the preceding claims. 6. The vehicular generator according to claim 5, wherein the projection is formed in a blade shape. 7. The suction fan according to claim 1, wherein the suction fan is disposed outside the vicinity of the ventilation outlet of the casing, and a bell mouth guide having a bell mouth is disposed at the ventilation outlet. The vehicle generator according to claim 1. 8. The vehicular generator according to claim 7, wherein the bell mouth guide is formed integrally with the casing. 9. The vehicle according to claim 1, wherein the casing has a ventilation hole communicating with the inside and outside of the casing at a portion facing the coil end of the stator coil exposed from the core of the stator. Generator. 10. The ventilation hole is provided with a plurality of ventilation holes located at an upper portion of a casing in use, and at least one ventilation hole located at a lower portion of the casing is provided. The generator for a vehicle according to claim 9, wherein the generator is formed to be smaller than a total opening area of the ventilation holes.