JPH08242556A - Device for detecting rotation and stop of rotary electric machine with cooling fan - Google Patents

Abstract

PURPOSE: To prevent the occurrence of such a dangerous case where someone touches a rotary electric machine with his hand while the machine is operated by attaching a simple detecting body which indicates the rotation or stop of the machine to the machine itself. CONSTITUTION: A cooling fan 3 surrounded by a fan cover 2 is provided on the non-rotating side of the main body 1 of a rotary electric machine and an exhaust port 5 is provided between the cover 2 and the main body 1 so as to discharge outside air 4 which cools the main body 1. One end of a long flexible detecting body 11 is fixed to the vicinity of the exhaust port 5 through which the outside air 4 is discharged by means of the fan 3 and the other end of the body 11 is made to free against the outside air 4. A string or ribbon is suitable for the detecting body 11. While the rotary electric machine is operated, the operation of the machine is indicated by the detecting body 11, because the body 11 moves in the outside air 4 discharged from the exhaust port 5. When the electric machine is not operated, the stop of the machine can be recognized, because the body 11 does not move, but hangs down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation / stop detection device for a rotating electric machine equipped with a cooling fan.

[0002]

2. Description of the Related Art FIG. 5 is a front view of a conventional fully-closed outer fan type electric rotating machine. In the figure, a cooling fan 3 surrounded by a fan cover 2 is provided on the half-operation side of a rotary electric machine body 1 having a terminal box 1a and legs 1b and a shaft end 1c protruding therefrom. An exhaust port 5 for discharging outside air 4 is located between the fan cover 2 and the rotary electric machine body 1. The discharged outside air 4 is the rotating electric machine body 1
Cool the outer circumference. A load (not shown) is coupled to the shaft end 1c. It is the most standard rotating electric machine.

[0003]

In recent years, noise reduction of rotating electric machines has been remarkably progressed, and the insulation class has been raised.
Then, the operating noise of the rotating electric machine is much smaller than the background noise around the site, and the surface temperature is considerably high.
If a person accidentally touches the rotating electric machine during operation with his or her hand, there is a risk of being burned or injured. Even if there are instruments on the switchboard for the rotating electrical machine that indicate that they are in operation, the instruments and the rotating electrical machine may be distant from each other, or the instruments may not be installed for economic reasons.
The dangerous situation does not change much. The object of the present invention is to provide a rotating electric machine with a simple detector for informing of the operation and stop, and to prevent the risk of accidentally touching a person with hands during operation. An object of the present invention is to provide an operation / stop detection device for a rotating electric machine including the above.

[0004]

According to a first aspect of the present invention, there is provided a driving / stop detecting device for a rotating electric machine equipped with a cooling fan, which is flexible near a discharge port for discharging outside air by a cooling fan of a fully closed or open type rotating electric machine. It has a long and flexible detector that is fixed at one end,
The other end of the detector is free from the outside air.

A second aspect of the present invention is the same as the first aspect of the present invention, in which the surface of the detector is subjected to a surface treatment for making the surface roughness fine. A third aspect of the present invention is the same as the first or second aspect, wherein the surface of the detector is subjected to cat's eye treatment. A fourth aspect of the present invention is the method according to the first, second or third aspects, in which the surface of the detector is subjected to fluorescence treatment.

[0006]

According to the first aspect of the present invention, during operation, it is possible to detect at a glance that the detection body flutters and sways due to the discharge of outside air from the discharge port and is in operation. During the stop, it can be detected at a glance that the detector does not sway and hangs down. The discharge of outside air is often twisted in the rotating direction of the rotating electric machine, and the rotating direction can be detected.

According to the second aspect of the present invention, when the surface of the detector is subjected to a surface treatment for making the surface roughness fine, it is difficult for the dust in the outside air to adhere to the detector and the shaking motion becomes large. According to the third aspect of the present invention, when the cat's eye treatment is performed on the surface of the detection body so that the surface of the detection body is made of fine glass balls and paint, the detection becomes easy even when the surroundings are dim. According to the invention 4, when the surface of the detection body is subjected to the fluorescent treatment, the detection becomes easier even in a dim light.

[0008]

FIG. 1 is a front view of a fully-closed outer fan type rotary electric machine according to a first embodiment, FIG. 2 is a front view of FIG. 1 during a stop, and FIG. FIG. 4 is a front view of the outer fan type rotating electric machine, and FIG. 4 is a one-sided cross-sectional view of the open type rotating electric machine of Example 3 on the non-driving side. In the conventional example and in each drawing, those denoted by the same reference numerals have approximately the same function and may not be described.

In the first embodiment shown in FIG. 1 during operation, the cooling fan 3 surrounded by the fan cover 2 is provided on the half-operation side of the rotating electric machine body 1 having the terminal box 1a and the legs 1b with the shaft end 1c protruding. It is provided. An exhaust port 5 for discharging outside air 4 is located between the fan cover 2 and the rotary electric machine body 1. The discharged outside air 4 cools the outer circumference of the rotating electric machine body 1. Shaft end 1c
A load (not shown) is coupled to. It is the most standard rotating electric machine.

A feature of the first embodiment is that one end of a flexible and long detector 11 is fixed near the outlet 5 for discharging the outside air 4 by the cooling fan 3 and the other end of the detector 11 is fixed. Be free to outside air 4. A string or a ribbon is suitable for the detection body 11. During the operation of FIG. 1, the detection body 11 can be detected at a glance to be swaying and swinging due to the discharge of the outside air 4 from the discharge port 5 to be in operation. During the stop shown in FIG. 2, it can be detected at a glance that the detection body 11 does not swing and hangs down. The discharge of the outside air 4 often twists in the rotation direction of the rotating electric machine, and the rotation direction can be detected.

When the surface treatment for reducing the surface roughness is applied to the detection body 11, it is difficult for the dust in the outside air to adhere to the detection body 11 and the shaking motion becomes large. When the surface of the detection body 11 is subjected to cat's eye treatment such that it is made of fine glass balls and paint, detection becomes easy even when the surroundings are dim. When the surface of the detection body 11 is subjected to the fluorescent treatment, the detection can be easily performed even in a dim light.

In the second embodiment shown in FIG. 3 during operation, a cooling rib 21 is provided on the rotating electric machine main body 1 of the totally enclosed outer fan type rotating electric machine shown in FIG.
Is fixed, and otherwise the same as in Example 1. The open type rotary electric machine shown in the one-side cross-sectional view of only the non-driving side of the third embodiment of FIG. 4 is the most standard one, and in the figure, the rotor 3
The cooling fan 3 of No. 1 discharges the outside air 4 from the exhaust port 5 by the air guide 32. One end of a flexible and long detection body 11 is fixed near the discharge port 5, and the other end of the detection body 11 is free to the outside air 4. Similar to Example 1 or 2,
During operation, the detection body 11 can be detected at a glance to be swaying and swinging due to the discharge of the outside air 4 from the discharge port 5 to be in operation. During the stop, it can be detected at a glance that the detection body 11 does not swing and hangs down.

Large-sized full-closed fan-type rotating electric machines include those equipped with an air / air heat exchanger. Although not shown, the inside air is cooled by the outside air via the heat exchanger. The outside air flows through the heat exchanger by the cooling fan 3, and the inside air flows through the heat exchanger by the internal fan. Similar to the first embodiment, one end of a flexible and long detector 11 is fixed near the exhaust port 5 of the air / air heat exchanger, and the other end of the detector 11 is connected to the outside air 4. If you feel free to
It is detected at a glance that 1 is fluttering due to the discharge of the outside air 4 from the discharge port 5 and is swinging and operating. During the stop, it can be detected at a glance that the detection body 11 does not swing and hangs down.

[0014]

According to the operation / stop detection device for a rotating electric machine having the cooling fan of the first aspect of the invention, one end of a flexible and long detector is provided in the vicinity of the outlet for discharging the outside air by the cooling fan. Since it sticks and frees the other end of the detector to the outside air, during operation it can be detected at a glance that the detector is swaying and swaying due to the discharge of outside air from the outlet, and then stopped. At some glance, it can be detected that the detection object does not sway and hangs down. Also, the discharge of outside air is often twisted in the rotating direction of the rotating electric machine,
The direction of rotation can also be detected. Therefore, there is an effect that it is possible to prevent a risk that a person accidentally touches with a hand or the like during driving by using a simple detector provided in the rotating electric machine itself for informing of driving or stopping.

According to the second aspect of the present invention, since the surface of the detection body is subjected to a surface treatment for making the surface roughness fine, there is an effect that dust in the outside air is less likely to adhere to the detection body and the swinging motion is increased. Invention 3
According to the method, since the cat's eye treatment is performed so that the surface of the detection body is made of fine glass spheres and paint, there is an effect that the detection becomes easy even when the surroundings are dim. According to the fourth aspect of the invention, since the surface of the detection body is subjected to the fluorescent treatment, there is an effect that the detection can be easily performed even in a dim light.

[Brief description of drawings]

FIG. 1 is a front view of a fully-closed outer fan type rotating electric machine in operation according to a first embodiment.

FIG. 2 is a front view of FIG. 1 in a stopped state.

FIG. 3 is a front view of a fully-closed outer fan type electric rotating machine according to a second embodiment during operation.

FIG. 4 is a cross-sectional side view of the open type rotating electric machine of Example 3 on the non-driving side.

FIG. 5 is a front view of a conventional fully enclosed fan-type rotating electric machine.

[Explanation of symbols]

1 Rotating Electric Machine Main Body 1a Terminal Box 1b Leg 1c Shaft End 2 Fan Cover 3 Cooling Fan 4 Outside Air 5 Exhaust Port 11 Detector 21 Cooling Rib 31 Rotor 32 Air Guide

Claims (4)

[Claims] 1. One end of a flexible and long detector is fixed near the outlet for discharging the outside air by a cooling fan of a fully closed or open type rotary electric machine, and the other end of the detector is outside air. An operation / stop detection device for a rotating electric machine provided with a cooling fan, which is characterized by being free of charge. 2. An operation and stoppage detection device for a rotating electric machine equipped with the cooling fan according to claim 1, wherein the detection body is subjected to a surface treatment for making surface roughness fine. , Stop detection device. 3. An operation and stoppage detection device for a rotating electric machine equipped with the cooling fan according to claim 1 or 2, wherein the surface of the detection body is subjected to cat's eye treatment, and an operation of the rotating electric machine comprising a cooling fan, Stop detection device. 4. An operation and stoppage detection device for a rotating electric machine equipped with the cooling fan according to claim 1, 2 or 3, wherein a fluorescent treatment is applied to the surface of the detection body. , Stop detection device.