JPS58151845A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To increase the cooling efficiency for the titled rotary electric machine by a method wherein air is sucked in from both sides in axial direction of the rotary electric machine having two or more electric sections, the frame bodies of which are stepped and formed in one body, and air is sent out toward the center part along the outer circumferential face of the frame body. CONSTITUTION:Both ends of the rotating shaft 4 of a totally-enclosed rotary electric machine, consisting of electric sections which are formed in one body with stepped frame body, a motor section 1 and a generator section 5, for example, are protruded from the frame body and a vane wheels 2 and 6, with which air is sucked in from outside, are attached to the protruded part respectively. Also a cover 3, which is covering the vane wheels 2 and 6 and extending to the section around the circumferential face of end part of the frame body, is installed leaving a space between the circumferential face of the frame body end part. The air which is sucked in from the air intake port of the covers 3 located on both sides in axial direction is discharged from both sides along the outer circumferential face of the frame body toward the center part, thereby enabling to cool the motor section 1 and the generator section 5 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fully enclosed rotating electric machine comprising two or more types of electric parts, such as a motor and a generator, each of which has a frame body integrated with a step, and more specifically.

The present invention relates to a cooling structure aK of the totally enclosed rotating electric machine.

A totally enclosed rotating electrical machine, such as a totally enclosed motor generator or a totally enclosed parent-child motor, which is composed of two or more types of electrical parts, has a step difference in the integrated frame due to differences in the structure of each electrical part. An example of such a conventional rotating electric machine is shown in FIG. 1, which is a side view of a motor generator.

The cooling mechanism section is shown in cross section. 1 is a generator driving electric motor part, 5 is a generator part, and has a common rotation @4,
Although the frame body is integrated, the frame body of the first generator section 5 has a large outer diameter, and there is a step difference between the frame body of the electric motor section 1 and the frame body of the electric motor section 1.

In order to cool this totally enclosed rotating electrical machine, the rotating shaft 4 of the motor 1
protrudes from the frame body, and attaches the impeller 2 to the protrusion s4,
Furthermore, a cover 3 that covers the impeller 2 is attached to the frame body.
As the rotating electric machine It is designed to be cooled from the outside of the frame. however,
Due to the difference in level between the motor section 1 and the generator section 5, the cooling air flows as shown by arrow a.
The air is deflected as shown in FIG. That lick, shot 1
The 1ca11- bearing also becomes larger due to temperature, the life of the lubricating oil is shortened, and it becomes unbalanced with the bearing on the motor side.
Maintenance is also a problem.

The main feature of the present invention is to solve the problems of the prior art described above,
To provide a completely blank type rotating electrical machine consisting of two or more types of electric parts in which cooling is effectively performed and temperature fluctuations are small.

The rotating electric machine according to the present invention is a fully enclosed rotating machine consisting of two or more electric parts, each of which is integrated with a stepped frame, in which both ends of a rotating shaft protrude from the frame, and the protruding portion An impeller metal is attached to each of the impellers, and a cover is attached to the frame body to cover the impeller and guide the air sent out by the impeller, and as the impeller rotates, air flows from both sides of the converter in the axial direction. The rotary electric machine is characterized in that the rotary electric machine sucks the liquid and sends it out along the outer surface of the frame toward the center of the rotary electric machine.

Hereinafter, a rotating electric machine according to the present invention will be explained based on drawings of embodiments. Similar to FIG. 1, FIG. 2 shows a side view of a motor generator as an example of a rotating electric machine, and shows a cooling mechanism section in cross section. As in the case of Fig. 1, 1 is the electric motor section, 5
Reference numeral 4 indicates a generator section, 4 indicates a rotating shaft, and the frame of the motor section 1 and the frame of the generator section 5 are integrated with a step difference.

In this electric power generator m, both ends of the rotating shaft 4 are made to protrude from the frame body, and impellers 2 and 6 are attached to the protruding parts 4, respectively, for sucking air from the outside to the inside. 7 indicates a bearing on the generator side, and impellers 2 and 6 are installed at both ends of the frame.
A cover 3 extending around the surface at a distance from the circumferential surface of the end of the frame body is attached. An air inlet is provided on the outside of the cover 3, and an air outlet is provided between the cover 3 and the frame surface. Therefore, when this rotating electric machine operates, the impellers 2 and 6 on both sides rotate, and the cover 3 rotates as shown by the arrow.
Air is sucked in from the air suction port on the outside of the cover 3 and sent out from the air delivery port between the cover 3 and the frame. The cold air sent out from the air outlet flows toward the center of the rotating electrical machine along the outer surface of the frame, cooling the electric motor section 1 and the heat generating section 5, respectively. If the impellers 2 and 6 have approximately the same blowing capacity and the air from impellers 2 and 6 meets near the step of the frame, the air from both sides will change directions as shown by arrows a and b. The rotary electric machine is cooled and hot air does not stay near the frame. In addition, the bearing part 7 on the side of the first generator 5 is also sufficiently cooled by the impeller 6 on the generator side, and the temperature rises *'t.
-Can be held low.

Since the rotating electric machine of the present invention is configured as described above, the following effects can be achieved.

(1) As a whole, all parts can be reduced to 100%, and the cost can be reduced.

(2) Bearing temperatures on both sides are almost equally low, extending the life of the lubricating oil and making maintenance easier.

(3) Even if installed in a dusty place, dust will not accumulate on the frame and will be scattered.

[Brief explanation of drawings]

FIG. 1 is a side view of a cooling mechanism section of an example of a conventional rotating electrical machine, and FIG. 2 is a side view of a cooling mechanism section of an embodiment of the rotating electrical machine of the present invention. 1... Drive electric motor section, 2.6... Impeller, 3...
・Cover% 4... Rotating shaft, 5... Generator section, 7...
·bearing. E 1-) r2 figure

Claims (1)

[Claims] In a fully enclosed rotating electrical machine consisting of two or more electric parts, each of which has a stepped frame, both ends of the rotating shaft protrude beyond the frame, and an impeller is attached to each of the protruding parts. A cover is attached to cover the impeller TL and guide the air sent out by the impeller, and as the impeller rotates, air is sucked from both sides in the axial direction of the rotating electrical machine and is drawn along the outer peripheral surface of the frame. A rotating electrical machine characterized in that the rotating electrical machine is configured such that the air is sent out toward the center of the rotating electrical machine.