JPH0767290A - Air guide fixing unit for axial fan of electric rotating machine - Google Patents

Abstract

PURPOSE:To allow finest and uniform adjustment of air gap between the outer periphery of an axial fan and the tubular part of air guide. CONSTITUTION:An axial fan 1 is secured to a shaft 8 being born on a bracket 6 fixed to an outer case 3 through a bearing 7. An air guide 2 comprising a tubular part 2a and an annular part 2b is disposed around the axial fan 1 through an air gap (g) and the annular part 2b is secured, on the outer periphery thereof, to an annular plate secured to the outer case 3 by means of screws 5 and tongued washers. More than two fixing metals 11 are arranged on the outer periphery of the annular part 2b wherein the fixing metal 11 is tapered in the inner diametral direction to allow abutting on the outer periphery of the annular part 2b and provided a radially elongated hole for passing the screw 5. The air guide 2 is centered by shifting the fixing metal 11 in the radial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an air guide having a cylindrical portion and an annular portion arranged on the outer periphery of an axial flow fan with a gap, and the outer periphery of the annular portion is screwed to an annular plate fixed to an outer cover. The present invention relates to an air guide attachment device for an axial fan of a rotating electric machine that is fixed.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view of a main part of a conventional example, in which an air guide 2 composed of a cylindrical portion (not shown) and an annular portion 2b is arranged on the outer periphery of an axial fan (not shown) with a gap therebetween. The outer periphery of 2b is fixed to an annular plate 4 fixed to a jacket (not shown) with screws 5. The outer periphery of the annular portion 2b of the air guide 2 is fitted to the fitting portion 4a formed by the machined flat surface portion of the annular plate 4 and the inner cylindrical portion, and fixed by the screw 5.

[0003]

In the above-mentioned conventional example, the machining of the annular portion 2b of the air guide of the press-formed product is not only difficult as the rotary electric machine is large, but also the outer periphery of the axial fan and the air The gap between the guide and the cylindrical portion is likely to be non-uniform, resulting in a larger gap and deterioration in the characteristics of the axial fan. If the gap is small, there is a risk of contact.

An object of the present invention is to provide an air guide mounting device for an axial fan of a rotary electric machine in which the gap between the outer periphery of the axial fan and the cylindrical portion of the air guide can be adjusted as small as possible. .

[0005]

An air guide mounting device for an axial fan of a rotary electric machine according to the present invention has an air guide composed of a cylindrical portion and an annular portion disposed on the outer periphery of the axial fan with a gap therebetween. In an air guide mounting device for an axial fan of a rotating electric machine, in which the outer periphery of the portion is fixed to an annular plate fixed to an outer cover with screws, three or more mounting members are arranged on the outer periphery of the annular portion. A taper opened in the inner diameter direction so as to be able to come into contact with the outer circumference of the and the elongate hole in the radial direction through which the screw can be inserted.

[0006]

According to the present invention, when the oblong hole in the light direction is moved with respect to the screw, the position of the fitting is changed in the radial direction. Then, the fixture comes into contact with the outer circumference of the annular portion of the air guide to move the air guide in a radially adjustable manner. Since three or more fixtures are arranged on the outer circumference of the annular plate, the air guide is centered. Therefore, the air gap with the outer circumference of the axial flow fan is adjusted to be uniform over the entire circumference.

[0007]

1 is a partial cross-sectional view of the embodiment, and FIG. 2 is a view of the fixture shown in FIG. 1 as seen from the direction of arrow P. The conventional parts having the same reference numerals have approximately the same function. The axial fan 1 is fixed to a shaft 8 supported by a bracket 6 attached to the jacket 3 via a bearing 7. A cylindrical portion 2a is provided on the outer circumference of the axial flow fan 1 with a gap g therebetween.
And an annular portion 2b, and the outer periphery of the annular portion 2b is fixed to the annular plate 4 fixed to the jacket 3 with screws 5 by means of a washer 5a having a tongue. As a feature of the embodiment, three or more fittings 11 are arranged on the outer circumference of the annular portion 2b, and the fitting 11 has a taper 11a opened in the inner diameter direction so as to be able to abut on the outer circumference of the annular portion 2b and the screw 5. A radial elongated hole 11b that can be inserted is provided.

According to this structure, if the elongated hole 11b in the light direction is moved with respect to the screw 5, the position of the fixture 11 is changed in the radial direction. Then, the fixture 11 becomes the air guide 2
The air guide 2 is brought into contact with the outer periphery of the annular portion 2b and is moved in the radial direction so as to be adjustable. Since three or more fixtures 11 are arranged on the outer circumference of the annular plate 2b, the air guide 2 will be centered. Therefore, the gap g from the outer circumference of the axial flow fan 1 is adjusted to be uniform over the entire circumference. Since the air gap g is adjusted to be uniform over the entire circumference, the air gap g can be designed small and the characteristics of the axial fan are improved.

[0009]

According to the air guide attachment device for an axial fan of a rotary electric machine of the present invention, the fixture aligns the air guide and adjusts the gap with the outer periphery of the axial fan to be uniform over the entire circumference. As a result, there is an effect that the characteristics of the axial fan are improved by making the outer peripheral air gap of the axial fan as small as possible.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an embodiment.

FIG. 2 is a view of the fixture shown in FIG.

FIG. 3 is a sectional view of a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Axial fan 2 Air guide 2a Cylindrical part 2b Annular part 3 Outer jacket 4 Annular plate 5 Screw 6 Bracket 7 Bearing 8 Shaft 11 Fixture 11a Taper 11b Long hole g Gap

Claims (1)

[Claims] 1. A shaft of a rotary electric machine in which an air guide including a cylindrical portion and an annular portion is arranged on the outer periphery of an axial fan with a gap therebetween, and the outer periphery of the annular portion is fixed to an annular plate fixed to a jacket with screws. In an air guide attachment device for a flow fan, three or more attachments are arranged on the outer periphery of an annular portion, and the attachments are capable of abutting the outer periphery of the annular portion, and a taper opened in the inner diameter direction and the screw can be inserted. An air guide attachment device for an axial fan of a rotary electric machine, comprising: an elongated hole in a radial direction.