JP3016463B2 - Generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator used for a vehicle or the like.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing a conventional generator disclosed in Japanese Utility Model Publication No. 4-31815, for example. In this drawing, reference numeral 1 denotes a cylindrical yoke fixed to the outside (not shown), 2 denotes a lubrication port provided in the yoke 1, and 3
Denotes an oil drain port provided in the yoke 1. Reference numeral 4 denotes a stator constituted by a cylindrical stator core 5 and a stator coil 6. Reference numeral 7 denotes a cylindrical spacer made of a non-magnetic material for fixing the yoke 1 and the stator 4 and magnetically isolating them. Reference numeral 8 denotes two excitation cores provided with excitation coils 9 therein and fixed to the left and right ends of the yoke 1 in FIG.

[0003] Reference numeral 10 denotes an annular seal member located on the inner periphery of the stator 4 and having both ends closed by an excitation core 8. 11
Is a claw pole rotor as a rotor which is provided coaxially on the inner peripheral portion of the stator 4 and is rotatably supported at both ends by bearings 12 as bearings. The bearing 12 is fixed to the bracket 13 and is excited in the bracket 13. The core 8 is fixed. The bracket 13 and the excitation core 8 constitute a fixed part. Further, an oil-cooled chamber 14 hermetically closed by the yoke 1, the excitation core 8 and the annular sealing material 10 is formed. Reference numeral 15 denotes a packing for preventing leakage of lubricating oil used for the bearing 12. Reference numeral 16 denotes a claw-pole type alternator configured as described above.

Next, the operation will be described. The stator coil 6 and the exciting coil 9 that are energized when the generator operates are
Generates a lot of heat. Stator coil 6 and excitation coil 9
Cooling oil is poured from the cooling oil inlet 2 into the oil cooling chamber 14 in the direction of arrow A in order to cool the heat. This cooling oil circulates in the oil cooling chamber 14, and the stator coil 6 and the excitation coil 9
Are cooled and then discharged from the oil discharge port 3 in the direction of arrow B. The bearing 12 is coated with solid grease as lubricating oil.

[0005]

Since the conventional generator is configured as described above, it is necessary to separately prepare the cooling oil for the exciting coil 9 and the lubricating oil for the bearing 12.

The present invention has been made to solve such problems, and has as its object to provide a generator which can easily cool a coil and lubricate a bearing.

[0007]

A generator according to the present invention comprises a stator comprising a stator core fixed to a yoke and a stator coil mounted on the stator core, and an excitation core disposed at both ends of the yoke for holding the excitation coil. , This excitation
Brackets for fixing the core cooling, bearings fixed to the bracket, the bearing through the gap through the heating portion of the stator or the excitation coils provided rotatably supported by the rotor and the bracket to the bearing between the stator An oil passage for supplying oil is provided, and the oil passage is provided to be inclined from a position retracted from the top of the bearing with respect to the rotation direction of the rotor.

[0008] The generator according to the present invention is further provided with a stator comprising a stator core fixed to the yoke via a spacer and a stator coil mounted on the stator core, and disposed at both ends of the yoke to hold the exciting coil. Exciter
A, brackets for fixing the exciting core, a bearing which is fixed to the bracket, through the heating portion of the stator or the exciting coil is provided rotatably supported by the rotor bearing, the bracket with a gap between the stator Along with introducing cooling oil to the bearing, an oil passage leading from the bearing to the lower portion of the stator and a lower portion of the stator are provided on the spacer,
It has a communication hole for guiding the cooling oil to the oil drain.

The generator according to the present invention further comprises a stator comprising a stator core fixed to the yoke and a stator coil mounted on the stator core, and an excitation core which is disposed at both ends of the yoke and holds the excitation coil. Exciter
Bracket, bearing fixed to the bracket, rotatably supported by the rotor in the bearing through the gap, is disposed in the gap oil cooling chamber to seal the stator side space between the stator to fix the A Sealing material forming an excitation core
And cooling oil through a bracket vignetting set oil cooling chamber is obtained with an oil passage leading to the bearing.

[0010]

According to the present invention, the bracket includes a stator.
Or Rutotomoni provided oil passage for supplying cold却油the bearing through the excitation coil, the oil passage is inclined toward the top of the bearing
Provided around the entire circumference of the bearing due to the rotational force of the bearing.
Cooling oil is pervasive and does not run out of oil.

Further, the yoke and the stator core are fixed.
A communication hole is provided in the spacer, and cooling oil is drained through this communication hole.
The spacer and stator are effective because they are led to the oil port.
It can be cooled effectively.

Also, in the space on the stator side including the exciting coil,
An oil cooling chamber through which cooling oil passes is provided, and cooling from this oil cooling chamber to bearings
Since the oil passage for sending oil is provided in the bracket, the cooling oil
It passes through the cold room and is supplied to the bearings.

[0013]

[Embodiment 1] FIG. 1 is a cross-sectional view of a generator showing one embodiment of the present invention, and FIG. 2 is a plan view of a bracket viewed from a direction indicated by an arrow C in FIG. In these figures, reference numeral 21 denotes a cylindrical yoke, which is fixed to an excitation core 22. 23 is a bracket to which the excitation core 22 is fixed, 23a is a front bracket provided on the right side in FIG. 1, and 23b is a rear bracket provided on the left side in FIG. The following are provided on the front bracket 23a and the rear bracket 23b, respectively. Oil inlets 24a, 24b, spiral grooves 25a, 25b as oil cooling chambers, oil passages 27a, 27b provided in the direction of bearings 26 as bearings, and an oil receiving portion 2 for lubricating the bearing 26 and cooling and lubricating oil.
Oil passages 29a and 29b for cooling and lubricating oil dropping downward in FIG. 1 are provided respectively from the oil receiving portions 8a and 28b and the oil receiving portions 28a and 28b.

Spiral grooves 25a and 30b are provided.
These are oil passages provided between a and 25b and the excitation core 22. 31 is an oil passage 29a provided in the yoke 21;
Numeral 32 denotes an oil receiving portion for receiving the cooling and lubricating oil dropped from 9b, and 32 denotes an oil passage provided in the excitation core 22.
Reference numeral 3 denotes an oil receiving portion for receiving the cooling and lubricating oil that has fallen from the oil passage 32. Reference numeral 34 denotes a cylindrical oil discharge port that is partially inserted into the yoke 21 and discharges the cooling and lubricating oil to the outside (not shown). It is. 35 is an O-ring for preventing oil leakage. 36 is the top of the bearing 26. The other configuration is the same as that of the conventional example, and the same or corresponding portions are denoted by the same reference characters and description thereof is omitted.

Next, the operation will be described. Cooling and lubricating oil is injected from the oil inlet 24 in the directions of arrows D and E. Then, as indicated by arrows L, M, N, and P in FIG. 2, the oil passage 3 provided between the exciting core 22 and the spiral groove 25 provided in the bracket 23 along the exciting coil 9.
Cooling and lubricating oil pass through Oa and 30b to take heat from the excitation core 22. The exciting core 22 is provided so as to surround the exciting coil 9 and has a structure in which heat is easily transmitted. Further, since the excitation core 22 having good thermal conductivity is used, heat is easily transmitted, and the heat generated in the excitation coil 9 is efficiently transmitted to the cooling oil and the lubricating oil.

The cooling and lubricating oil passing through the oil passages 30a and 30b passes through the oil passages 27a and 27b,
Are supplied as shown by arrows G or Q. Since the oil passages 27a and 27b are thinner than the oil passages 30a and 30b, the oil passages 27a and 27b are supplied to the ball of the bearing 26 with a certain momentum. Bear link 26
After cooling and lubricating oil supplied to the oil receiving portions 28a and 28b after lubricating the bearing 26, the arrow H or S
Flows through the oil passages 29a and 29b as shown by the arrow, falls into the oil receiving portion 31, passes through the oil passage 32 as shown by the arrow J, and drops into the oil receiving portion 33. The cooling and lubricating oil dropped into the oil receiving portion 33 flows as shown by the arrow K, and is discharged from the oil discharge port 34 to the outside in the direction of the arrow F.

The oil passage 27 is inclined from the top 35 of the bearing 26 in the direction of the arrow R in the direction of rotation of the bearing 26, that is, the oil passage 27 is retracted from the top in the rotation direction.
The cooling and lubricating oil are distributed over the entire circumference of the bearing 26 by the rotational force of the bearing 26 because the bearing 26 is provided at an angle. Thus, since the cooling and lubricating oil are always supplied to the bearing 26, the claw pole rotor 11
It does not run out of oil unlike grease lubrication, even when it rotates at high speed. Also, the stator 4 and the claw pole rotor 1
Since there is no need to provide an annular sealing material or the like for stopping the oil between the stator 4 and the claw pole rotor 11, the distance between the stator 4 and the claw pole rotor 11 can be minimized. The deterioration of the magnetic characteristics during the period can be minimized.

Embodiment 2 FIG. FIG. 3 is a cross-sectional view illustrating a generator according to the second embodiment. In this figure, the cooling oil injected into the oil cooling chamber 14 is supplied to the bearing 12 in the direction of arrow T through an oil passage 41 penetrating the exciting core 8 and the bracket 13.
After lubricating the bearing 12, the cooling oil supplied to the bearing 12 is discharged to the outside in an arrow U direction through an oil passage 42 provided in the bracket 13. Since other configurations and operations are the same as the conventional example, the same or corresponding portions
The same reference numerals are given to the same parts, and the description is omitted.

Embodiment 3 FIG. In the first embodiment, the oil passage 27 and the bearing 26 and the oil reception section 28 and the oil passage 29 and the oil receiving portion 31 and the oil passage 32 and the oil discharge port 34 and sealed oil passage bout, oil port 2
By applying a pressure from 4, the flow of the cooling and lubricating oil can be made to be a forced flow, and the installation angle of the generator can be made freely.

[0020] In the first embodiment, portions of the spacer 7 before cooling and lubricating oil is discharged from the oil discharge port 34
To the spacer 7 so as to flow in the direction of the arrow K as shown in FIG.
Such a communication hole is formed to cool the spacer and stator.
Do. Further, when the cooling fins extending in the direction K to the spacer 7 (not shown) Ru provided a spacer 7 can more effectively <br/> cooling.

In each of the above embodiments, the oil passage and the oil receiving portion may be inclined to facilitate cooling and lubricating oil flow.

In the first embodiment, the stator 4 can be cooled by, for example, transferring heat from the stator 4 to the oil passages 31a and 31b using a material having good heat conductivity.

Further, while each of the above embodiments has shown a claw-pole type AC generator, the same applies to other generators.

[0024]

The present invention is configured as described above ,
Rotate the oil passage provided in the bracket to the top of the bearing
Because it was provided inclining from the position retracted in the direction,
Cooling oil may spread all around the bearing, causing oil to run out.
And the stator and exciting coil are
Cools effectively.

Further, the yoke and the stator core are fixed.
A communication hole is provided in the spacer, and cooling oil is drained through this communication hole.
The spacer and stator are effective because they are led to the oil port.
It can be cooled effectively.

An oil cooling chamber for passing cooling oil is provided in the stator side space including the excitation coil, and an oil passage for sending cooling oil from the oil cooling chamber to the bearing is provided through the excitation core and the bracket. > Because of the radiation, cooling oil is supplied to the bearing through the oil passage ,
The bearing can be lubricated.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a generator according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a bracket according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a generator according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yoke 4 Stator 6 Stator coil 8 Exciting core 9 Exciting coil 11 Claw pole rotor 12 Bearing 13 Bracket 14 Oil cooling chamber 16 Claw pole type generator 21 Yoke 22 Exciting core 23 Bracket 25 Groove 26 Bearing 27 Oil passage 41 Oil passage

Claims (3)

(57) [Claims] 1. A stator comprising a stator core fixed to a yoke and a stator coil mounted on the stator core, an excitation core disposed at both ends of the yoke for holding an excitation coil, and a bracket for fixing the excitation core. A bracket, a bearing fixed to the bracket, a rotor rotatably supported by the bearing via a gap between the stator, and a heat-generating portion of the stator or the exciting coil provided on the bracket. A generator provided with an oil passage for supplying cooling oil to the bearing via the oil passage, wherein the oil passage is provided to be inclined from a position retracted from the top of the bearing with respect to the rotation direction of the rotor. 2. A stator comprising: a stator core fixed to a yoke via a spacer; and a stator coil mounted on the stator core; an excitation core disposed at both ends of the yoke for holding an excitation coil; Fix
Constant to bracket, bearing fixed to the bracket,
A rotor rotatably supported by the bearing via a gap between the rotor and the stator, cooling oil is guided to the bearing via a heat-generating portion of the stator or an exciting coil provided on the bracket, and the bearing further extends from the bearing. A generator comprising: an oil passage leading to a lower portion of a stator; and a communication hole provided in the spacer at a lower portion of the stator, for leading the cooling oil to a drainage passage. 3. A stator comprising a stator core fixed to a yoke and a stator coil mounted on the stator core, an excitation core provided at both ends of the yoke for holding an excitation coil, and a bush for fixing the excitation core. Rake'<br/> DOO, bearings fixed to the bracket, rotatably supported by a rotor with a gap to the bearing between the stator, is arranged in the gap to seal the stator side space sealing material forming the oil cooling chamber Te, and the upper Symbol exciting core
Originating <br/> electrical machine, characterized in that the cooling oil of setting vignetting the oil cooling chamber through the said bracket having an oil passage leading to the bearing.