JPS5911745A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To improve the magnetic property, heat sink property, operating performance and noise characteristic of a rotary electric machine by fixedly welding the bottom between corrugated heat sink fins to the projection on the outer periphery of a stator core. CONSTITUTION:The projection of a stator core 4 and the center 6 of the bottom of the valley of the corrugated heat sink fin 1 of a casing body 2 are superposed, and the body 2 is welded to a stator core 4 through the body 2 at the center 6 of the bottom of the valley of the fin 1 of the body 2 from the outer surface of the body 2. Loss heats generated from a rotor 8, the core 4 and a stator coil at the operating time can be transmitted via an inside fan to the inner air, which transmits the loss heats to the inside heat transfer surface 16 of the fin 1. The loss heats transmitted to the fin 1 is dissipated from the outer surface 7 of the fin 1 to the atmospheric air via forced draft of an outside fan.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a rotary electric machine having a casing with molded radiation fins.

[Technical aspects of inventions and their problems] In general,
The casing of a rotating electric machine, such as an 8kI machine, has one stator core, and bearing brackets that hold the rotor shaft are attached to both wheels of the stator core. Equipped with a mounting point for installation.

The extremely small size of the 64-wheel drive unit has low heat loss due to operation (secondary operation), so the required heat dissipation area is small. However, as b'Dk increases, the heat loss caused by 311 heat increases, and if the casing is in the form of a 3V plate, the heat dissipation is insufficient. End (2?'67.ll
An I fan is installed to reduce the increase in heat dissipation. Traditionally, casings with this type of structure were manufactured integrally with the heat dissipation fins using cast iron, and in the case of Shusaku Isogami, which had a relatively small production volume, the body of the steel plate and the heat dissipation fins were welded together. However, in the latter case, the number of welding steps is large, and it is not necessarily necessary to add (14). A casing with good characteristics has been proposed.This is relatively useful.
Crush both ends of the 1° corrugation to create a corrugated heat dissipation fin, and cover the 116 minutes with bath contact. After forming a certain number of corrugated heat dissipating fins, cut the copper strip to a certain size, and then weld it into a shape (-) by applying pressure to the beginning and end of the band using two Then, insert the casing shell (the two-piece iron core 7), and attach flanges for the bearing brackets and lT to both ends of the casing shell.
1. My father took one leg and made it into a casing by attaching it to the bath.

This casing is well thermally bonded to the stator core.
The casing body and the stator core are in contact at r'6 at the bottom of the valley of the corrugated radiation fins for the purpose of fixation.
Carbon dioxide arc bath welding, MIG welding, or submerged arc welding is generally used for M welding with.

Since this welding method penetrates the copper strip and welds, the welding heat input is large (because the welding bead is large compared to the plate thickness, the welding process does not result in large welding distortion) (11) -There are many 1s,
<y<layered hardness>> is unfavorable from the length of the child core of 1 m, so welding must be limited to the minimum necessary.

The deterioration of the roundness of the stator core due to welding distortion is due to
This will cause uneven force, cause noise, abnormal wear of the bearings, and impair the functions of the IDJ Tenryuki. Therefore, in order to maintain a perfect circle after welding, press forming or molding within the stator core is required.
Machine No. 1 requires 11 finishing steps, so production efficiency is high.
tA.

[Purpose of the invention]

The present invention has high heat dissipation, 'r:+''4E1g, main pressure mowing←
It has a heat dissipation fin with -, and is equipped with a vague hardness of magnetic characteristics. -I
It is the purpose of providing changes.

[Summary of the Invention] In the second process, the copper band was formed into a continuous waveform (2), the p1 part on both sides of it was formed into a waveform (2), and the 7d contact (
A casing body with a large number of cylindrical corrugated heat dissipating fins (2) Insert a stator core made of punched plates laminated in a cylindrical shape with many protrusions on the outer periphery; Fixing the stator core at the protruding parts (Secondly, the melted part of the stator core when exposed to acid solution is mainly stopped at the protruding parts, and welding solidification (Secondly, to reduce heat shrinkage due to The purpose is to prevent cracks in the iron core and achieve high production efficiency and high performance rotation.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention (two examples shown in Figures 1 to 6) will be described.
This will be explained with reference to the figures. A steel strip wound into a hoop shape (not shown) is fixed at regular intervals by θ bending (two consecutive v1 bends (knot shape force; bending fins (1) to a predetermined position),
Leave it as it is.
If l~te 1 tongue 14 people (dual element. The beginning and end M: M
of! L ini bathing 1ゐ. Both ends of the V-guts 14 heat dissipating fins (1) are made into taman J, a press mold (Tsubushi, 4J#, 1 lever, and a casing body (2). The stator core (lI) is punched from a magnetic iron plate. Laminate the punched boards (4a) and
f'lc; Welded together in several places using conventional n-square welding, Reitz welding, or sieve energy key density welding such as 'Ichiko beam welding (two-banded welding, as shown in Figure 4). The binding welding part (C)) is provided at a right angle C2 to the surface of the punched plate (4a), and its outer periphery H1, and the binding welding part ((1)4j interval is the waveform heat radiation of the casing body (2) Fin (1
), the number of which is determined by the mechanical strength of the conveyor between the heads. FIG. 5 is a partially enlarged view of the punched board (4a), which has a protrusion (1) 0 on the outer periphery of the punched board (4a).
There is C. The spacing between the protrusions (18) is arranged so as to match the spacing between the corrugated heat dissipating fins (1) as shown in FIG.
'do. Next (Identical iron to the second casing shell (2)!1 no (
4) Insert. At this time, as shown in Fig. 3, the protrusion (18) of the 1^1 stator core (4) and the center (6) of the valley bottom of the corrugated radiation fin (1) of the casing body (2) are tightly overlapped. Connect the casing shell (2) and stator bolt (.1 ) to obtain the casing body (2),
1111 and E11 match. In Figures 1 and 6, M i- ('71 is the joint weld part C. This joint melt Jd is produced by welding with sieve energy pressure such as carbon dioxide laser, electron beam, or plasma).
Although it is preferable to use ft4<'A type arc welding method with a general carbon dioxide arc bath welding method.

The height of the protrusion (181) of the punched plate (4a) is determined by the depth of insertion into the protrusion 08.l in relation to the bond bath welding (l) to be employed. θυ11
However, preferred i5. Less than a friend is enough.

Both 1111 ends of the casing cell (2) have a turn 11 (child).
8) Fit the bearing bracket (9) to support the flange 00) and weld the outer 111
11 Weld and attach the leg (11) to the "T' section,
Casing. The rotor (8) is equipped with an inner fan (1), an outer fan (1), and a wind guide cover (14) that guides the wind generated by the outer fan (1) to the corrugated heat dissipation fins (1). ) is attached to the bearing placket (!Jl). (15) is the stator winding.

The following (Please note the following two actions.) - The rotational center machine with the configuration described in (A) generates electricity from the rotor (8), solid foot iron nob (4), stator winding u:)+, etc. during operation. Loss heat to the inner fan (
12), the inside air is transferred to the inside 'A' (2), and the inside air is passed through the corrugated heat dissipation fins (
1) The inner heat transfer surface (If9f) has a two-loss sintering loss.The heat loss transferred to the corrugated heat dissipation fin (1)
13H2, the heat is radiated from the outer surface (17) of the corrugated heat radiation fin (1) to the outside air. Inner heat transfer direction (1
The surface profile of 6) is almost equal to the outer surface ([71], and the inner heat transfer direction ([6) is thicker than that of conventional fins and ridges), so the heat dissipation characteristics are as good as 'b'. From the perspective of the magnetic properties of rotating heavy machinery, [Isuke, in this embodiment, the fixed welded part (7) between the casing shell (2) and the stator core (4) is made of soil as the stator core (4). The magnetic flux passes through the yoke r<l
Since it is located outside the outer radius of K, the effective width of the yoke 0!1 is less reduced than the conventional example shown in FIG. 7, so the excitation flow and iron loss are reduced compared to the conventional one.

In addition, in this embodiment, the outer periphery of the stator core (4) is directly hardened by bath melting, as seen in the R4 contact when the conventional stator core (4) has no protrusions in FIG. Without a doubt, the bath melting fY:; of the stator core (4) is located at the protrusion (
I8), the weld solidification (secondary heat collection tank) is smaller, there is no need for strain relief processing, and production efficiency is improved, the operating performance of the entire rotating machine is also improved, and the bearing life is increased. and mechanical magnetic pieces (two also result in wiping -0 especially the fixed welds of the casing shell (2) and stator core (11) ('7+),
When performing the above-mentioned high-energy sensitivity welding, a thin energy beam is applied to the lower part (6) of the corrugated heat dissipation fin (1).
) is the space that only illuminates 1. (If you want to use IR, +
Since the contact + iJ' i + is the same, the pitch of the corrugated heat dissipating fins (1) can be made smaller than in the case of ash gas f4 contact or MIG bath contact, which require a relatively large space, and it is easier to weld. There is no limit to the pitch from the point of view, and if the strength of the mold for forming the corrugated heat dissipating fins (1) is not sufficient, the pitch of the corrugated heat dissipating fins (1) can be made smaller.Therefore, for those of the same diameter, the heat dissipation IIti can be made smaller. Get a lot of products and rotate
Heavy equipment has significantly increased capacity, 1- that is, downsizing has become +]J capacity.

It should be noted that the present invention is not limited to the embodiment described in 17 and shown in the drawings, but for example,
Fixing I (g contact part ('l) between l) and casing body (2)
There is no need to worry about the continuation, and the corrugated heat dissipation fin (1)
Of course, it is possible to change the gist of the system in various ways, such as not necessarily requiring it for all the bottoms, and certain parts not having to be in contact with the fixed bath.

〔Effect of the invention〕

As explained above, according to the invention, the magnetic properties are ambiguous due to the fact that the bottoms between the corrugated radiation fins and the protrusions on the outer periphery of the element core are fixed by melting.

It has excellent heat dissipation, low drivability, and noise characteristics, and has high production efficiency and miniaturization.
It is possible to provide a suitable rotational tooth size.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional elevational view of the upper half of an embodiment of the rotary heavy machine of the present invention, Fig. 2 is a perspective view of the main part showing the casing shell of Fig. 1, and Fig. 3 is the I of Fig. 1. 4 is a perspective view showing the stator core of FIG. 1, and FIG.
FIG. 6 is an enlarged sectional view of the main part of FIG. 3, and FIG. 7 is a sectional view of the main part of a conventional rotary heavy machine. 1...Wave-shaped heat dissipation 2...Casing body 3
...End 4...Hard > [Child iron) 1.・
5... unity intoxication i'tis 7...l? i
'l Fixed melt pitch f11;18... Protrusion agent for punching board Patent attorney Inoue - Male Figure 1 Sword I Figure 2 Figure 5

Claims (1)

[Claims] Steel 1? Continuously (two-component type (L-molded), both ends of which are crushed, and (two-component) are sealed by dipping and sealed, and many protrusions are provided on the outer periphery. The rotary bow I machine is characterized in that the stator core is inserted into a circular 1gJ shape (two-layered stator core), and the bottom part of the wave-shaped radiation fin and the stator core are welded together at the protrusion part. .