JPS62217836A - Ag generator for rolling stock - Google Patents

Abstract

PURPOSE:To improve the cooling efficiency of a generator by enclosing the stator coil ends with an enclosure composed of insulating resin material, forming a flow passage in the circumferential direction between the back of the enclosure and the internal wall of front and rear brackets, fitting a cooling cover to the external end of the rear bracket, forming a branch flow passage between both internal wall of a rear bracket and the back of the enclosure on the backside, and feeding the coolant through this passage. CONSTITUTION:A pulley 2 and a rotor 3 are fixed to a rotating shaft 1 and clicks 5a and 7a of pole cores 5 and 7 jut out in the circumferential direction. An exciting coil 9 is held to an iron core 8 and a statore core 10 holds a stator coil 11 at its slot. An enclosure 24 is made of insulating materials of synthetic resin, enclosing both coil ends of a coil 11. For a front bracket 26 a flow passage 32a of the coolant is formed in the circumferential direction between the inner wall and the back of the enclosure 24. Between the inner wall of a bracket 30 and an enclosure 24 on the backside a coolant flow passage 32b is formed in the radial direction. The coolant flows through the flow passage and branch flow passage to cool the generator, so that its cooling efficiency is improved.

Description

[Detailed description of the invention] [Industrial application field] This invention is effective against both engines such as automobiles.

This field concerns automotive alternators, particularly cooling improvements.

[Conventional technology]

A conventional vehicular alternator has a cross-sectional view shown in FIG. (1) is a rotating shaft to which a pulley (2) is fixed. (3) is fi! on the rotation axis fil! i! The rotor is constructed as follows. (4) is the rotor core, (5) is one of the Fa magnetic pole cores, and the plurality of magnetic pole claws (
5a) are put out at intervals in the circumferential direction. (
6) is a non-magnetic support ring fixed to the inner periphery of the magnetic pole claw part (5a), and (7) is the other 1 fixed to this support ring (6).
In the hexapole iron core, a plurality of @ pole claw portions (7a) are spaced apart in the circumferential direction and alternate with the magnetic pole claw portions (5a).

(8) is a fixed excitation side iron core disposed through an air gap between the rotor iron core (4) and the other magnetic pole iron core (7);
An excitation coil (10) held in a single iron core (8)
is the stator core, which holds the stator coil αυ in its slot. a2 is the rotation axis il through the front [111] bearing 0
The front bracket supports the + and also connects and supports the stator core (10), and the rear bracket is provided with cooling air outlet holes (12a). When the rotary shaft (1) is supported via the rear bearing 09, the iron core (8) is firmly supported on both sides, and an inlet hole (13m) for cooling air is provided. α Rike Stator Coil α A rectifier that converts the old AC power into DC power, α
The power detects the generator voltage, controls the excitation current, and adjusts the terminal '4 voltage to a specified level'd! Pressure regulator, (to) rotation axis (1
This is a fan fixed at 1.

In the above-mentioned conventional device, the rotating shaft (11) is rotated through the belt by the rotation of the vehicle engine.As a result, the alternating voltage induced in the stator coil I is adjusted to a predetermined value by the voltage regulator αη. The rectified DC power is sent to the excitation coil (9
) and is also supplied to a load such as a storage battery.

On the other hand, cooling air is sucked in from the inlet hole (13m) of the rear bracket (03) by the rotation of the fan (to), cooling the inside of the machine, and then pulled out from the outlet hole (12a) of the front bracket @ by the n fan (to). It is discharged.

[Problem to be Solved by the Invention 1] In the conventional generator cooling structure as described above, the cooling capacity of the fan is insufficient, so There were problems in that it was difficult to increase the output current due to insufficient cooling due to the limit of heat resistance, and that the output current decreased significantly due to insufficient cooling of the excitation coil. On the other hand, there is also the idea of increasing the size of the fan to improve its cooling capacity, but there are issues with ease of installation.

There is a problem with noise. As described above, since cooling by a fan has an optical limit, it is difficult to increase the output current, and the design has to be designed with a drastic decrease in output in mind.

This invention was made to solve the above-mentioned problems, and by water-cooling the generator, the cooling efficiency was improved, and the CE generator was made smaller and had a higher output. The object of the present invention is to obtain a dual-purpose power generator that can suppress a decrease in output by effectively cooling the power source.

[Means for solving problems]

The four-wheel AC generator and electric machine according to the present invention surround the stator coil ends with an enclosure made of an insulating resin material, and a circle F is formed between the back of the enclosure and the inner wall of the front and rear brackets. A flow passage is formed to allow the cooling liquid to flow, a cooling cover is attached to the outer end of the rear bracket, a branch flow passage is formed between the two, and a rectifier and a voltage regulator are attached to the outer end surface of this cooling cover. The cooling liquid is distributed in branched flow passages, and the heat receiving part of the heat pipe is connected to the excitation side iron core or the excitation coil in a good heat conduction state, and the heat dissipation part at the other end is placed in the branched flow passage. It is something.

[Effect]

In this invention, the stator coil and stator core are effectively cooled by the circulation of cooling fluid, the rectifier and voltage regulator are cooled through the cooling cover, and the bearing is cooled by the cooled front and rear brackets. At the same time, the excitation coil is efficiently cooled via the dynamic magnetic side iron core and the heat pipe.

[Actual gun example]

・Figure g1 is a vertical sectional view showing an example of an actual gun of the vehicle alternator according to the present invention. The g2 factor is between the front parts shown partially cut away in Figure 1, fil , +21 , +61 ,
+71, (7a), (91~Ql), Q condolence~
α7) It is the same as the conventional device for the first offense. 21) is a rotor, and one magnetic pole iron core (21) is fixed to the rotating shaft (1).
b) A plurality of W/finger claw portions (Fza) are spaced apart from each other in the circumferential direction and alternate with the magnetic pole claw portions (7a).

123 is a fixed excitation side iron core arranged through an air gap between one and the other fa-like iron cores (a) and (7), and holds an excitation coil (91). Both coils of e14h stator coil αυ A pair of enclosures on both sides enclosing the ends, made of an insulating material such as synthetic resin, and fixed to the stator core (10) in a liquid-tight manner to keep the stator coil (6) liquid-tight. There is.

Next, (7) is a front bracket that supports the stator core (lO), and the cylindrical protrusion (24a) at the end of the enclosure is fitted into the annular groove (26a). It is liquid-tightly sealed by a gasket (b), and a cooling liquid flow path (a2a) is formed in the circumferential direction between the inner wall and the back surface of the enclosure. Before this bracket (7
) is provided with an inflow pipe (2) and an outflow pipe for the coolant, and a partition part (26b) is provided between them and the back surface of the enclosure (goods) when both are in the open position. (To) is a tube connected to the inflow pipe (C) from the outgoing side of the coolant circulation system of the vehicle's engine, and (7) is the tube connected to the outflow pipe (A), which is the return path of the above coolant circulation system. This is a tube that goes back to the side. (1) is a rear bracket that is liquid-tightly connected to the front bracket row C through an O-ring Gυ, and the cylindrical protrusion C24a) of the enclosure is fitted into the annular groove (30a), and the viscous gasket (5
) for liquid-tight sealing. The rear bracket (3) fixes the excitation side iron core (3) and supports the bearing asf, and serves as a branch hole (30c) and a return hole (30d) for the coolant. A coolant flow passage (32b) is formed in the radial direction between the inner wall of the rear bracket (1) and the back surface of the rear enclosure (c), and a partition part (32b) is formed to separate the inflow side and the outflow side. sob) is provided.

Made of C10 good heat conductive metal material, rear bracket (toward)
The cooling cover is liquid-tightly attached to the outer end of the cooling liquid, and a branch flow path (3 holes) for the cooling liquid is formed between the two, allowing the cooling liquid from the branch hole (300) to flow and return. Return it from the hole (30d) to the middle of the flow path (32b). A rectifier tube is fixed to the outer end surface facing the cooling cover via a heat sink (16a), and a voltage regulator αη is fixed via a heat sink (11).

(7) is the heat receiving part (Z5a) at one end, the excitation side iron core (
2) is coupled to the heat nozzle in a good heat conductive state, and the heat radiation part (25b) at the other end is disposed in the branch flow passage (320). CA is a protective bracket attached to the rear bracket (1).

The cooling effect of the device of the above embodiment is as follows. A portion of the low-temperature coolant of the vehicle's engine is flowed, flows into the inflow pipe (7), flows through the flow passages (32a) and (32b) as shown by the arrow, and flows through the stator core (101, stator coil αυ
Cooling 1. The temperature of the coolant increases, the coolant flows out from the outflow pipe, and is returned to the return side of the engine's coolant circulation path.

Also, a part of the cooling liquid that has flowed into the branch passageway (32b) from the inflow pipe (c) is transferred from the branch hole (300) to the branch passageway (32b).
0) flows as shown by the arrow, cools the rectifier Qfj and voltage regulator 0η through the cooling cup (-), and flows through the flow path (32b
) to be returned to the middle.

Furthermore, the front bracket (4), which is effectively directly cooled by the coolant, absorbs heat and cools the bearing α, and the rear bracket (4)
The bearing 05 is endothermically cooled, and the excitation coil (91) is endothermically cooled via the excitation side iron core (2).Furthermore, the heat receiving part (25a) is in a state of good heat conduction with the excitation side iron core (c). Since the heat dissipation part (25b), which is the other end of the coupled one-dobe pipe, is disposed in the branch flow passage (32c), the heat dissipation rate increases and the heat transfer efficiency improves. ) The endothermic cooling of the excitation coil (91) is further promoted.

In this way, the stator coil (+01), rectifier 0 to . Because it is done effectively,
The excitation current does not drop significantly, and therefore the output current does not drop significantly.

In the above embodiment, the heat pipe has 40 heat receiving parts (25
A) is simply connected to the excitation side iron core (c) in a magnetic conduction state, but as shown in Figure 3, the heat receiving part (25
a) % - At the same time, it is connected to the excitation side iron core Ij in a good heat conduction state, and at the same time, it is pressed to the end of the winding frame (9a) of the same heat conduction material around which the excitation filter (91 is wound) in a good heat conduction state. For example, the excitation coil (91f) can be more effectively cooled by endothermic cooling.

Furthermore, since the heat dissipation fins (250) are provided in the heat dissipation section (25b) disposed in the branch flow passage (320) of the good thermal conductor, the effect of endothermic cooling of the excitation coil (91) is increased.

Note that in the above embodiment, a portion of the coolant was flowed from the coolant circulation system of the engine to the generator, but the present invention is not limited to this.
A separate system of cooling liquid circulation means may be provided.

[Effects of the Invention] As described above, according to the present invention, both fill ends of the stator coil are surrounded by an insulating material enclosure, and the circles formed between the inner walls of the front and rear brackets and the back surface of the enclosure tree are Coolant flows through a circumferential flow path, and part of the coolant flows through a branch flow path formed between the rear bracket and a cooling cover attached thereto, and a rectifier is installed on the outer end surface of this cooling cover. and voltage adjustment: Attach the excitation coil to the inner end surface of the rear bracket via the excitation side iron core, and further connect the excitation side iron core and the heat receiving part, and install a heat pipe with the heat dissipation part arranged in the branch flow passage. Therefore, the heat generating part is effectively cooled, and miniaturization and high output can be achieved.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a vehicle alternator according to an embodiment of the present invention, Figure 2 is a partially broken front view of the device shown in Figure 1, excluding the protective cover, and Figure 3 is a partially broken view of the device shown in Figure 1. FIG. 4 is a vertical cross-sectional view showing another embodiment of the invention, and FIG. 4 is a vertical cross-sectional view of a conventional alternating current generator for a vehicle. (11...rotating shaft, (7)...@ pole iron core, (91...
... Excitation coil, (9a) ... Winding frame, (10) ...
Stator core, αD...Stator coil, 04), α9・
...bearing, af5...rectifier, αη...voltage regulator, Qυ...rotor, (a)...@pole iron core, (2)
...Excitation side iron core, ■...Enclosure, (to)...Heat pipe, (25a)...Heat receiving part, (25b)...Heat radiation part, (25c)...Radiation fin, ■ ...Front bracket, (26a)...Annular groove, (7)...Rear bracket, (30m)-! grooves, (32a), (32b
)−? N passage, (32Q) ... Branch flow passage, (to)
...Cooling cover Note that the middle symbol "m" indicates the same or equivalent part.

Claims (4)

[Claims] (1) A rotor magnetic pole core that is fixed to the rotating shaft rotated by the vehicle engine and excited by an excitation coil, a stator core that surrounds this pole core and has a stator coil attached to it, and supports this stator core. At the same time, in a vehicle alternator equipped with a front bracket and a rear bracket that support the rotating shaft through bearings, a rectifier, and a voltage regulator, both coil ends of the stator coil are respectively surrounded in a liquid-tight manner. A pair of enclosures on both sides, the inner part of which is liquid-tightly connected to the outer end of one of the enclosures, and a cooling fluid flow path is formed in the circumferential direction between the inner wall and the back surface of the enclosure. a front bracket, a rear bracket which is liquid-tightly connected to the outer end of the other enclosure at its inner side and has a cooling fluid flow path formed in a circumferential direction between the inner wall and the enclosure; A cooling device is attached to the outer end of the bracket in a liquid-tight manner, and the cooling liquid is branched from the flow path of the rear bracket to the branch flow path formed between the two, and the rectifier and voltage regulator are fixed to the outer end surface. An alternator for a vehicle, comprising a cover, in which a heat receiving part of a heat pipe is coupled to an excitation side iron core holding the excitation coil in a state of good heat conduction, and a heat dissipation part at the other end is disposed in the branch passage. . (2) The vehicular alternator according to claim 1, wherein a part of the coolant is diverted from the coolant circulation system of the engine and distributed to the flow path. (3) The vehicular alternator according to claim 1 or 2, wherein the heat receiving portion of the heat pipe is crimped onto the end face of the winding frame around which the excitation coil is wound. (4) The vehicular alternator according to any one of claims 1 to 3, wherein a radiation fin is provided in a radiation portion of the heat pipe on the side of the branch flow passage.