JPS6142497B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a cooling structure for a rotating electric machine, and more specifically, a housing and an end bracket are assembled to form an outer cover, and the outer cover and a fan cover are assembled together. This relates to a cooling structure in which a rectifying fin is provided between.

As shown in FIG. 1, a conventional rotating electric machine of this type supports a rotating shaft 2 via bearings on end brackets 1, 1, and
A housing 3 having a stator core 3a is assembled to form an outer cover 4. A fan 5 is installed at a position protruding from one side of the end bracket 1 of the rotating shaft 2.
is fixed, and a fan cover 6 covering the fan 5 is attached to the end bracket 1 facing the fan 5 with screws 7, and a rectifying fin 8 is disposed between the inside of the fan cover 6 and the jacket 4.

Then, the fan 5 is rotated together with the rotating shaft 2,
Air is sucked through the suction hole 6a of the fan cover 6,
The air passes between the rectifying fins 8 and is rectified, thereby cooling the heat generated from the stator core 3a. Note that 2a is a rotor core.

FIG. 3 is a diagram for explaining the effect of the rectifying fins on cooling, where the horizontal axis shows the number n of the rectifying fins 8, and the vertical axis shows the increase T in the internal temperature of the rotating electric machine. As is clear from FIG. 3, when the rectifying fins 8 are provided, the increase T in the internal temperature of the rotating electric machine is lower than when the rectifying fins 8 are not provided. Note that when the number of rectifying fins 8 exceeds the appropriate number, the ventilation area between the rectifying fins 8 decreases, and as the number of rectifying fins 8 increases, the rise T in the internal temperature of the rotating electric machine increases.

By the way, in a conventional rotating electric machine, the rectifier fin 8 is attached to a cast end bracket 1 as shown in FIG.
The fan cover 6 is attached to a fixture 9 provided on the end bracket 1 with screws 7. Such a configuration has the disadvantage that the thickness of the rectifying fins 8 is increased and the ventilation area between the rectifying fins 8 is reduced. Or, Figures 4 to 7
As shown in the figure, the rectifying fins 8 and the fixture 9 may be made of steel plates. That is, as shown in FIGS. 6 and 7, the member a provided with the rectifying fins 8 is fixed by welding or the like to the inside of the fan cover 6, and the fan cover 6 is shaped into an L shape as shown in FIG. It is attached to the end bracket 1 as shown in FIG. 4 using a bent fixture 9.

However, when the rectifying fins 8 and the fixture 9 are constructed as separate members from the end bracket 1, there is a problem that not only the number of parts increases but also the assembly work is time-consuming.

[Object of the Invention] In view of the above-mentioned problems, the object of the present invention is to provide a cooling system for a rotating electrical machine that can reduce the number of parts and facilitate assembly work, thereby reducing costs. It is intended to provide structure.

[Summary of the Invention] The present invention is characterized in that a housing and an end bracket that rotatably supports the shaft are assembled to form an outer cover, and a fan cover that covers the fan is attached to the end bracket outside the outer cover of the shaft. In a rotating electric machine that is assembled to a fan cover and has rectifying fins between the outer cover and the fan cover, the end bracket is formed from a steel plate, and a plurality of protrusions are provided on the outer side of the end bracket to extend outward. , a protrusion plate with these protrusions facing the inner wall of the fan cover;
The rectifying fins are bent and formed perpendicular to the end cover, the fan cover is attached to a suitable one of the protruding plates with screws, and the rectifying fin is disposed between the outer cover and the fan cover.

Therefore, since the end bracket, protruding plate, and rectifying fin are formed by bending a single sheet of steel, the number of parts can be reduced and assembly work can be performed easily.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 8 to 13.

As shown in FIG. 11, the end bracket 1 has a plurality of neck portions 12 extending outward from the center of the end bracket at appropriate intervals on the outer side of the end bracket 1, and a plurality of neck portions 12 are formed on the end portions of the neck portion 12. A wider protruding plate 11 is further extended. These protruding plates 11 are provided with a first folding line 11a that linearly connects ruled lines and cutting lines to the neck 12, and a second folding line 11a that is orthogonal to the first folding line and dividing the protruding plate 11. A curve 11b is applied. Further, a suitable number of the plurality of protruding plates 11 are provided with screw holes 13 for attaching the fan cover 6 to one side divided by the second folding line 11b.
Then, the rectifying fins 8 are formed by bending along the first folding line 11a and the second folding line 11b. That is, the protruding plate 11 is bent from the first folding line 11a so as to face the inner wall of the fan cover 6, and a part of the protruding plate 11 is bent perpendicularly to the en-bracket so as to face the center of the end bracket 1 from the second folding line 11b. Then, the rectifying fins 8 are formed by bending them.
Incidentally, reference numeral 14 denotes a plurality of fitting portions provided in the circumferential direction that fit into the inner diameter of the end portion of the housing 3.

A second embodiment of the present invention is shown in FIGS. 14 to 16.
This will be explained based on the diagram. FIG. 14 is a partial front view of the end bracket 1 before bending. The outwardly extending protrusion of the end bracket 1 consists of a rectifying fin 8 connected at a neck 22 and a protruding plate 21 having a screw hole 13. In this case, the outer end of the protrusion is bent at a right angle from the bending line 21a so that the protrusion plate 21 having the screw hole 13 faces the inner wall of the fan cover 6, and the protrusion plate 21 is connected to the end bracket from the neck 22. The rectifying fins 8 are formed by twisting them back and forth orthogonally. With this configuration, the bending portion between the protruding plate 21 and the rectifying fin 8 and the neck portion 22 are located apart from each other, making the bending work easier.

[Effects of the Invention] As is clear from the above description, in the present invention, the protruding plate for fixing the fan cover to the end bracket and the rectifying fin are integrally bent and formed, so that the fan cover can be fixed to the end bracket. You can easily place the rectifier fins by just
Compared to the conventional method, the number of parts can be significantly reduced, and the number of assembly steps can be reduced.

Therefore, the present invention has the advantage of being able to significantly reduce the number of parts and assembly man-hours, and therefore cost reduction.

[Brief explanation of the drawing]

Fig. 1 is an upper half sectional view showing an example of the configuration of a conventional rotating electric machine, Fig. 2 is a cutaway front view showing the end bracket of Fig. 1, Fig. 3 is an explanatory diagram showing the effect of the rectifying fin, and Fig. 4 The figure is a partially omitted sectional view showing a conventional example of the assembled state of the end bracket and fan cover.
Similarly, Fig. 5 is a front view showing the fixture, Fig. 6 is a partially omitted sectional view showing the assembled state of the fan cover and end bracket with the rectifier fin fixed, and Fig. 7 is the same, Fig. 7 is a front view showing the fixing device. It is a front view of a part which shows a fan cover. FIG. 8 is a sectional view showing a main part of an embodiment of the present invention, and FIG. 9 is a view taken in the direction of arrow A in FIG. 8, and FIGS.
The figure shows a partial sectional view and a partial front view of the end bracket protruding plate before bending, respectively.
FIGS. 12 and 13 are a partial sectional view and a partial front view, respectively, showing the end bracket protruding plate in a bent state, and FIG. 14 is a front view before bending, showing another embodiment of the present invention. 15 and 16 are a front view and a plan view, respectively, showing the state in which the protruding plate is bent. 1 is an end bracket, 2 is a rotating shaft, 3 is a housing, 4 is a jacket, 5 is a fan, 6 is a fan cover, 7 is a screw, 8 is a rectifying fin, 11, 21 are protruding plates, 11a, 11b, 21a are Folding line, 13 is a screw hole for mounting.

Claims (1)

[Claims] 1. A housing and an end bracket that rotatably supports the shaft are assembled to form an outer cover, and a fan cover that covers the fan is assembled to the end bracket to form an outer cover and a fan cover. In the rotating electric machine, the end bracket is formed from a steel plate, and a plurality of protrusions extending outward are provided on the outer side of the end bracket, and these protrusions are attached to the fan cover. A protruding plate facing the inner wall of the end cover and a rectifying fin orthogonal to the end cover are bent and formed, and the fan cover is attached to an appropriate protruding plate among the protruding plates with screws, thereby connecting the outer cover and the fan cover. A cooling structure for a rotating electric machine characterized by having a rectifying fin arranged between the cooling structure.