JPH07163090A - Generator - Google Patents

Abstract

PURPOSE:To perform effective cooling and bearing lubrication by passing cooling oil from an external oil cooling chamber through a spiral oil passage formed closely to the coils and bearings of a generator, and discharging it to the outside. CONSTITUTION:A cylindrical yoke 21 which anchors the stator 4 of a generator in the inner peripheral surface is held between a front bracket 23a and a rear bracket 23b put on both sides. Cooling oil pressurized and injected from cooling oil injecting inlets 24a and 24b provided in both brackets 23a and 23b passes through spiral grooves 25a and 25b provided in the exciting cores 22 of exciting coils 9, and passes through oil passages 30a, 30b, 27a and 27b. Then the cooling oil cools bearings 26, lubricates them, passes through oil passages 29a and 29b, flows between the stator coils 6 and exciting coils 9 as shown by an arrow J, passes through an oil receiving part 33, and is discharged from an oil discharging outlet 3. As a result of this, it becomes possible to cool and lubricate the generator and its bearings effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator used in vehicles and the like.

[0002]

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

Numeral 10 is an annular seal member located on the inner circumference of the stator 4 and having both ends thereof closed by the exciting core 8. 11
Is a claw pole rotor as a rotor, which is coaxially provided on the inner peripheral portion of the stator 4 and whose both ends are rotatably supported by bearings 12 as bearings. The bearing 12 is fixed to the bracket 13 and is excited by the bracket 13. The core 8 is fixed. The bracket 13 and the exciting core 8 form a fixed portion. Further, an oil cooling chamber 14 that is sealed by the yoke 1, the exciting core 8 and the annular sealing material 10 is formed. Reference numeral 15 is a packing that prevents the lubricating oil used for the bearing 12 from leaking. Reference numeral 16 is a claw pole type AC generator 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 is operating are
Generates a lot of heat. Stator coil 6 and exciting coil 9
Cooling oil is poured into the oil cooling chamber 14 from the cooling oil inlet 2 in the direction of arrow A in order to cool the heat of the above. This cooling oil circulates in the oil cooling chamber 14, and the stator coil 6 and the exciting coil 9
After cooling and, the oil is discharged from the oil discharge port 3 in the direction of arrow B. Further, solid grease is applied to the bearing 12 as lubricating oil.

[0005]

Since the conventional generator is constructed 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 the above problems, and an object thereof is to obtain a generator capable of easily cooling a coil and lubricating a bearing.

[0007]

The generator according to the present invention is provided with an oil passage which communicates with the bearing from the oil cooling chamber and through which the cooling oil passes.

Further, an oil cooling chamber for passing cooling oil is provided in a fixed portion provided with the exciting coil, and an oil passage for sending cooling oil from the oil cooling chamber to the bearing is provided.

Further, the oil cooling chamber is arranged along the coil.

[0010]

In the present invention, since the oil passage is provided from the oil cooling chamber to the bearing and through which the cooling oil passes, the cooling oil supplied to the oil cooling chamber passes through the oil passage and is supplied to the bearing.

Further, since the oil cooling chamber for passing the cooling oil is provided in the fixed portion provided with the exciting coil and the oil passage for sending the cooling oil from the oil cooling chamber to the bearing is provided, the cooling oil passes through the oil cooling chamber. ,
Supplied to bearings.

Further, since the oil cooling chamber is arranged along the coil, the cooling oil is passed along the coil.

[0013]

EXAMPLES Example 1. FIG. 1 is a sectional view of a generator showing an embodiment of the present invention, and FIG. 2 is a plan view of a bracket as seen from the direction of arrow C in FIG. In these figures, 21 is a cylindrical yoke, and this yoke 21 is fixed to the exciting core 22. Reference numeral 23 is a bracket to which the exciting 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 front bracket 23a and the rear bracket 23b are provided with the following, 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 oil receiving portion 2 for receiving cooling oil and lubricating oil that lubricates bearings 26
8a, 28b and oil passages 29a, 29b for dropping cooling and lubricating oil downward from the oil receiving portions 28a, 28b in FIG. 1 are provided, respectively.

Numerals 30a and 30b are spiral grooves 25.
It is an oil passage provided between a and 25b and the exciting core 22. 31 is an oil passage 29a, 2 provided in the yoke 21
9b is an oil receiving portion for receiving the cooling oil and lubricating oil, 32 is an oil passage provided in the exciting core 22, and 3 is an oil passage.
Reference numeral 3 is an oil receiving portion for receiving the cooling oil and the lubricating oil that has fallen from the oil passage 32, and 34 is a cylindrical oil discharge port that is partially inserted into the yoke 21 and discharges the cooling oil and the lubricating oil to the outside (not shown). Is. Reference numeral 35 is an O-ring for preventing oil leakage. 36 is the top of the bearing 26. Since other configurations are similar to those of the conventional example, the same reference numerals are given and omitted.

Next, the operation will be described. Cooling and lubricating oil are injected from the oil inlet 23 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 excitation core 22 and the spiral groove 25 provided in the bracket 22 along the excitation coil 9.
Cooling and lubricating oil pass through 0a and 30b to remove heat from the exciting core 22. The exciting core 22 is provided so as to enclose the exciting coil 9 and has a structure in which heat is easily transmitted. Further, since the exciting core 22 has a high thermal conductivity, heat is easily transferred, and the heat generated in the exciting coil 9 is efficiently transferred to cooling and lubricating oil.

The cooling and lubricating oil that has passed through the oil passages 30a and 30b passes through the oil passages 27a and 27b, and the bearing 26.
The ball is supplied as shown by arrow G or Q. Since the oil passages 27a and 27b are thinner than the oil passages 30a and 30b, they are supplied to the balls of the bearing 26 with a certain amount of momentum. Bear link 26
After cooling the bearing 26, the cooling and lubricating oil supplied to the oil drops into the oil receiving portions 28a and 28b, and the arrow H or S
The oil flows through the oil passages 29a and 29b as shown in FIG. The cooling and lubricating oil dropped on the oil receiving portion 33 flows as indicated by arrow K, and is discharged to the outside through the oil drain port 34 in the direction of arrow F.

Further, since the oil passage 27 is provided so as to be inclined from the top portion 35 of the bearing 26 in the direction opposite to the rotation direction arrow R of the bearing 26, the rotation force of the bearing 26 cools the entire circumference of the bearing 26. Lubricating oil spreads. In this way, since the bearing 26 is constantly supplied with cooling and lubricating oil, even if the claw pole rotor 11 rotates at a high speed, there will be no oil shortage unlike grease lubrication. Further, since it is not necessary to provide an annular seal material or the like for oil stop between the stator 4 and the claw pole rotor 11, a minimum gap can be provided between the stator 4 and the claw pole rotor 11. It is possible to minimize the deterioration of the magnetic characteristics between the stator 4 and the claw pole rotor 11.

Example 2. FIG. 3 is a sectional view showing 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 the oil passage 41 that penetrates the exciting core 8 and the bracket 13. The cooling oil supplied to the bearing 12 lubricates the bearing 12, and then is discharged to the outside in the direction of arrow U through the oil passage 42 provided in the bracket 13. Since other configurations and operations are similar to those of the conventional example, the same reference numerals are given and omitted.

Example 3. In the first embodiment, the oil passage 27, the bearing 12, the oil receiving portion 28, the oil passage 29, the oil receiving portion 31, the oil passage 32, and the oil discharge port 29 are a series of sealed oil passages, and the oil filling port 23 It is also possible to freely set the installation angle of the generator by applying a pressure from the cooling and lubricating oil to a forced flow.

In the first embodiment, for example, when cooling and lubricating oil flows in the direction of arrow K before being discharged from the oil discharge port 29, cooling fins are provided in the spacer 7 in the direction of arrow K, It is possible to cool 7.

Further, in each of the above embodiments, the oil passages and the oil receiving portions may be inclined to facilitate cooling and lubricating oil flow.

In the first embodiment, it is also possible to cool the stator 4 by, for example, transferring heat from the stator 4 to the oil passages 31a and 31b with a substance having good heat conductivity.

Further, although each of the above-described embodiments has been described with respect to the claw pole type AC generator, the same applies to other generators.

[0024]

Since the present invention is constructed as described above, the oil passage is provided which communicates with the bearing from the oil cooling chamber and through which the cooling oil passes, so that the cooling oil supplied to the oil cooling chamber passes through the oil passage. ,
Since it is supplied to the bearing, it is possible to lubricate the bearing with cooling oil.

Further, since the oil cooling chamber for passing the cooling oil is provided in the fixed portion provided with the exciting coil and the oil passage for sending the cooling oil from the oil cooling chamber to the bearing is provided, the cooling oil passes through the oil cooling chamber. Since it is supplied to the bearing, it is possible to lubricate the bearing with cooling oil.

Further, since the oil cooling chamber is arranged along the coil, the cooling oil is passed along the coil, so that heat can be effectively transferred from the coil to the cooling oil.

[Brief description of drawings]

FIG. 1 is a cross-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 cross-sectional view showing a conventional generator.

[Explanation of symbols]

 1 Yoke 4 Stator 6 Stator Coil 8 Excitation Core 9 Excitation Coil 11 Claw Pole Rotor 12 Bearing 13 Bracket 14 Oil Cooling Room 16 Claw Pole Type Generator 21 Yoke 22 Excitation Core 23 Bracket 25 Groove 26 Bearing 27 Oil Passage 41 Oil Passage

Claims (3)

[Claims] 1. An oil cooling chamber to which cooling oil for cooling a coil is supplied, a rotor provided outside the oil cooling chamber, a bearing for supporting the rotor, and the cooling oil from the oil cooling chamber. A generator with an oil passage supplied to the bearing. 2. A stator provided with a stator coil, a rotor provided inside the stator, a bearing that supports the rotor and is lubricated with lubricating oil, a fixed portion to which the bearing is fixed, and a fixed portion. And a cooling coil for exciting the rotor, the cooling oil supplied to the bearing is used as the lubricating oil. 3. The generator according to claim 1, wherein the oil cooling chamber is arranged along the coil.