JPS62225146A - Ac generator for vehicle - Google Patents

Abstract

PURPOSE:To effectively cool the heat-generating sections of a stator coil and the like, by surrounding both the coil ends of the stator coil with a surrounding unit, and by conducting cooling liquid through passages formed between brackets provided with radiation fins and the surrounding unit. CONSTITUTION:Both the coil ends of a stator coil ll are surrounded with a surrounding unit 24, and cooling liquid is conducted through passages 32a, 32b formed between brackets 26, 30 and the surrounding unit 24. The brackets 26, 30 forming the passages 32a, 32b are provided with radiation fins 26c, 30c. The cooling liquid flowing in from an inflow pipe 28 is conducted through the passages 32a, 32b, and coola stator core 10 and the. stator coil 11, is made to run out of an outflow pipe 29. A part of the cooling liquid flowing into the passage 32b from the inflow pipe 28 is conducted through a branch passage 32c from a branch hole 30b, and cooling a rectifier 16 and a voltage regulator 17 via a cooling cover 33, is returned on the way of the passage 32b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an AC angle viewing machine for a vehicle driven by an engine of a vehicle such as an automobile, and particularly relates to an improvement in cooling.

[Conventional technology]

A conventional vehicular alternator has a cross-sectional view shown in Figure G4. III is the rotating shaft, and the goo January 2) is stuck on it. (3) is a rotor fixed to the rotating shaft fil, which is constructed as follows. (41 rotor core, (
6) On one side of the magnetic pole core, a plurality of magnetic pole claw portions (5a) are provided at intervals in the circumferential direction. (6) A non-magnetic support ring (γ
)#-j On the other magnetic pole core fixed to this support ring (6), a plurality of magnetic pole claws (7a) are spaced apart in the circumferential direction, and the magnetic birch claws (5a) are alternately protruded. has been done.

(8) A fixed excitation side iron core arranged between the swage rotor iron core (4) and the other magnetic pole iron core (7) via an air gap, (9
1 piece of iron core (excitation coil held at 81, (10)
is the stator core, which holds the stator coil (b) in the slot. 0 is a front bracket that supports the rotating shaft fi+ via a bearing a4 and also connects and supports the stator core (]0), and is provided with an outlet hole (12a) for cooling air. Q3
F′! The rear bracket connects and supports the stator core (lO), and supports the rotation (++) via the bearing α9.
The iron core (8) is firmly supported, and the cooling air inlet hole (13
a) is provided. A rectifier that converts the alternating current force generated by the stator coil αυ into DC power, αη is an electronic regulator that detects the generator voltage, controls the excitation @ current, and adjusts the terminal voltage to a predetermined Cζ, and (to) is the rotating shaft. This is a fan fixed to +I+.

In the conventional device described above, the rotating shaft (1) is rotated via the belt by the rotation of the vehicle engine. As a result, the AC voltage applied to the stator coil αυ is adjusted to a predetermined value by the voltage regulator a, and the rectified DC power is applied to the exciting coil (
91 and is supplied to a load such as a storage battery.

On the other hand, as the fan (to) rotates, cooling air is sucked in from the inlet hole (13a'l) of the rear bracket α3, cools the inside of the machine, and is drawn out from the outlet hole (12a) of the front bracket (c). Discharged by

[The problem that the invention attempts to solve]

Conventional vehicle alternator as above for lights and fans 08
Cooling is done through the circulation of cooling air, and the cooling effect is not sufficient.
There was a problem that insulation deteriorated due to outside air ventilation.

Furthermore, in the case of an increase in output, a fan (
There was a problem in that the noise level also increased as the windage loss increased.

This invention was made to solve these problems, and it is an AC power generator for vehicles that uses a highly effective cooling means without using ventilation cooling by a fan, is compact, ultramarine, and eliminates the loss and noise caused by the fan. The purpose is to take advantage of the opportunity.

[Means for solving problems]

In the vehicle alternator according to the present invention, the ends of the stator coils are surrounded by an enclosure, and flow passages are dispersed between the enclosure and the bracket to allow the coolant to flow and to form the flow passages. The bracket is provided with heat radiation fins.

[Effect]

In this invention, the stator coil and the fixed iron core are effectively cooled by the circulation of the cooling liquid, and even when the shaft is cooled by the bracket cooled through the radiation fins,
The excitation coil is cooled through the flowing cabin air or the excitation m-side iron core.

〔Example〕

Figure 1 is a vertical sectional view showing an example of a winding alternator for a vehicle according to the present invention, and Figure 2 is a partially cutaway front view of Figure 1. +61,
+71, (.

7a), i91 to αυ, and α to αη are the same as the above-mentioned conventional device. 62)) is a rotor, and one magnetic bar iron core (a) fixed to the rotating shaft +11 has a plurality of magnetic pole claws (
22a) are spaced apart in the circumferential direction, and the above! 4141
Q7a) It is not melting and coming out alternately.

The poles are the fixed excitation side iron cores that are installed on one and the other Wt pole iron cores (a) and (7) through an air gap, and hold the excitation coil (91). A pair of enclosures on both sides enclosing the coil ends, made of a metal material such as aluminum with good thermal conductivity, and between the coil ends is filled with an insulating light insulation material made of synthetic resin, etc., and the stator core ( 10), and the stator coil α
υ is protected liquid-tight. A plurality of heat dissipation fins (24b) are provided in the circumferential direction on the back surface of this enclosure (goods).

Next, on the front bracket that supports the stator core (10), inset the cylindrical projection (24a) at the end of the enclosure (26a) into the annular shape (1) (26a), and inset the viscous silicone. It is liquid-tightly sealed with a gasket (a) such as a system, and a cooling liquid flow path (32a) is formed in the circumferential direction between the inner wall and the back surface of the enclosure (c). An inlet pipe (4) and an outlet pipe (to) for the coolant are placed on the front bracket (to), and there is a partition (asb) between the front bracket (to) and the back of the enclosure (c). is provided. (26Q)
A plurality of heat dissipating fins are integrally carved on the inner wall surface of the front bracket 7) so as not to obstruct the flow of the coolant.

(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 (to) is the tube connected to the outflow pipe - which is returned to the return side of the coolant circulation system. It's a tube. ■ After being liquid-tightly connected to the curved bracket (to) via the 0 ring 0η, fit the cylindrical protrusion (24a) of the enclosure (c) into the annular groove (30a), and insert the viscous gasket (i). ) for liquid-tight sealing. Attach the rear platen l) to secure the excitation side iron core @, and attach the support plate 051.
It supports a cooling liquid branch hole ('X)Q) and a return hole (30d). A coolant flow path (32b) is formed in the radial direction between the inner wall of the rear bracket (1) and the back surface of the rear enclosure (2), and a partition part (30b) separates the inflow side and the outflow side. is not yet established.

(30e) A plurality of heat dissipating fins are each formed integrally with the rear bracket (2), and are configured so as not to impede the flow of the cooling liquid.

The iron is made of a metal material with good thermal conductivity, and is a cooling cover that is liquid-tightly attached to the outer end of the rear bracket (toward), with a branch flow path (320) for cooling liquid formed between the two, and a branch hole. (
3) The cooling liquid from Q) is circulated and returned to the middle of the flow path (32b) from the return hole (30d). The inner surface of this cooling cover has a plurality of radiation fins (33a) in the flow direction of the cooling liquid.
is provided. A rectifier q0 is fixed to the outer end surface of the cooling cover (to) via a heat sink (16&), and a voltage regulator αη is fixed via a heat sink (17b). C34 is a protective cover attached to the rear bracket (7).

The cooling effect of the device of the above embodiment is as follows. Some of the low-temperature coolant from the vehicle's engine is flushed out and the inlet pipe (towards)
It flows through the flow passages (32a) and (32b) as shown by the arrow, cools the stator core t101 and the stator coil round, and rises in temperature, and then flows out from the outflow pipe (a) to cool the engine. The liquid is returned to the return side of the liquid circulation system.

In addition, a part of the cooling liquid that has flowed into the flow passage (32b) from the inflow pipe (c) flows from the branch hole (30b) through the branch flow passage (3) as shown by the arrow, and passes through the cooling cover to the rectifier. σ
and the voltage regulator αη, and is returned to the middle of the flow path (32b).

Furthermore, the front bracket (E), which is effectively directly cooled by the cooling fluid, absorbs heat and cools the bearing α4, and the rear bracket (7)
The bearing tap is endothermically cooled, and the excitation coil (91) is endothermically cooled via the excitation side iron core device.

The front and rear brackets (A) and (To) each have heat dissipation fins (
260) (Ten e) is removed by 1, and each enclosure (C) is provided with a heat dissipation fin (z4b), and the cooling cover () is provided with a heat dissipation fin (33M), Heat exchange is increased and the cooling effect is further improved.

In this way, the stator coil αD, which generates a large amount of heat, and the rectifier aQ
, voltage regulator αη, and excitation coil (91) are effectively cooled, temperature rise is significantly suppressed, and no fan is required, eliminating ventilation noise.

Figure J3 is a longitudinal sectional view showing another embodiment of the vehicle alternator according to the present invention. The rotor θη consists of one and the other magnetic pole iron cores fixed to the rotating shaft +11 and an excitation coil (9) held by these.
A plurality of magnetic pole claw parts (42a) taken out from the magnetic pole iron core (a) and a plurality of magnetic pole claw parts (43a) taken out from the magnetic pole iron core are arranged alternately. ■ is a slip ring that energizes the excitation coil (91), and the current is collected by the brush device ■.The rear bracket (7) is sealed near the cooling cover 6 in a liquid-tight manner, forming a branch flow path (32o). A rectifier Q and a voltage regulator α'' are housed in the cooling cover (b). (47) is a protective cover.

Front and rear brackets (to), (7) are heat dissipation fins (26Q
), (3)e), the rotor (41
) Due to the internal air flow caused by the rotation of the excitation coil (9)
can dissipate heat efficiently.

In the above embodiment, a portion of the coolant is routed through the engine coolant circulation system to the generator, but the present invention is not limited to this, and a separate coolant circulation means may be provided.

〔Effect of the invention〕

As described above, according to the present invention, both coils of a stator coil are surrounded by an enclosure body, and the cooling liquid is circulated through the flow path formed between the bracket and the enclosure body, and the flow path is formed. Since heat dissipation fins are provided on the bracket, the heat generating parts such as the stator coils are effectively cooled, making it possible to reduce the size and weight, and eliminate the noise and wind damage caused by conventional ventilation.
Also, since it can be completely closed, insulation may deteriorate due to outside air and may be harmful.

Damage caused by gas and salt damage is prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a vehicle alternator according to the present invention;
2 is a partially cutaway front view of the device shown in FIG. 1, excluding the protective cover; FIG. 3 is a longitudinal cross-sectional view of a vehicle AC generator showing another embodiment of the present invention; and FIG. This is a vertical cross-sectional view of a conventional dual-purpose AC generator.
...Excitation coil, [01...Stator core, 0])...
・Stator coil, α41. (15...Bearing, αQ...
・Rectifier, αη...Voltage regulator, 3υ...Rotor,
(a)...Magnetic pole core, ■...Enclosure, (24b).
・Radiation fin.

Claims (3)

[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. In addition, in a vehicle alternator equipped with a bracket that supports the rotating shaft via a bearing, the coil end of the stator coil is liquid-tightly surrounded, and a cooling fluid flow path is formed between the coil end of the stator coil and the bracket. What is claimed is: 1. An alternator for a vehicle, characterized in that an enclosure body is provided, and a radiation fin is provided on the bracket that forms the flow path. (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 a radiation fin is provided on the back surface of the enclosure.