JPH0214309Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rotating electric machine, and particularly to a rotating electric machine in which two air coolers are provided in the axial direction through an exhaust port opened above the center of a frame.

[Technical background of the invention]

In general, rotating electric machines installed on ships and the like are often equipped with air coolers, depending on the installation environment.
In recent years, an increasing number of such models are equipped with two air coolers in case the air cooler fails.

Fig. 1 shows this type of conventional rotating electric machine, where 1 is a rotating shaft rotatably supported by a frame 3 via a bearing 2, and 4 is a rotating shaft fixed to the rotating shaft 1. 5a and 5b are first and second ventilation fans fixedly provided near both ends of the rotor 4, respectively; 6 is a stator facing the rotor 4 and fixedly provided to the frame 3; Reference numeral 7 denotes an exhaust port that opens above the center of the frame 3, and includes first and second exhaust ports.
The air blown from both ends to the center by the ventilation fans 5a, 5b cools the rotor 4 and stator 6, and then is discharged from the exhaust port 7. 8a,
8b are first and second air coolers mounted on the frame 3 and provided in the axial direction across the exhaust port 7;
Reference numeral 9 denotes a first ventilation plate provided between the first and second air coolers 8a and 8b to guide the air discharged from the exhaust port 7 to the first and second air coolers 8a and 8b, An exhaust passage 10 is formed. 11a and 11b are first and second air intake ports opening above both axial ends of the frame 3; 12a and 12b are air cooling ports between the first air cooler 8a and the first air intake port 11a; The air cooled by the first and second air coolers 8a and 8b provided between the air cooler 8b and the second air intake port 11b is supplied to the first and second air intake ports 11, respectively.
second and third ventilation plates leading to a and 11b,
First and second intake passages 13a and 13b are formed.

The rotating electric machine configured in this manner sends the air discharged from the exhaust port 7 to the first or second air cooler 8.
a, 8b, and the cooled air is blown to the rotor 4 and stator 6 by first and second ventilation fans 5a, 5b provided near both ends of the rotor 4, so that, for example, Even if a failure occurs in either one of the first and second air coolers 8a, 8b, the rotating electrical machine can continue to operate by reducing the amount of load applied to the rotating electrical machine.

However, since the rotating electrical machine with such a configuration is provided with the first and second air coolers 8a and 8b in the axial direction across the exhaust port 7, the The air discharged near the first air cooler 8a is directed to the first air cooler 8a side,
Moreover, most of the air discharged to the vicinity of the second air cooler 8b is sucked toward the second air cooler 8b. Moreover, the air cooled by the first and second air coolers 8a and 8b is transferred to the first and second air coolers, respectively.
Since the air is blown to the rotor 4 and stator 6 by the ventilation fans 5a and 5b, the air blown by the first ventilation fan 5a is inevitably sent to the first air cooler 8a.
The air blown by the second ventilation fan 5b is discharged to the vicinity of the second air cooler 8b, and as a result, the air blown by the first ventilation fan 5a is discharged to the vicinity of the second ventilation fan 5b. 1 air cooler 8a
The air blown by the second ventilation fan 5b is also cooled exclusively by the second air cooler 8b. Therefore, if a failure occurs in one of the first and second air coolers 8a and 8b, the parts of the rotor 4 and stator 6 that are cooled by the air cooler on the failed side will not be cooled. The temperatures of the rotor 4 and stator 6 become locally high. Therefore, even if one of the air coolers is in good condition, such a rotating electrical machine has the drawback that continuous operation cannot be performed unless the load on the rotating electrical machine is significantly reduced.

[Purpose of invention]

The present invention was developed in view of the above-mentioned drawbacks.First,
To provide a rotating electric machine which can cool a rotor and a stator almost equally and operate continuously even if a failure occurs in one of a second air cooler by slightly reducing the amount of load applied to the rotating electric machine. With the goal.

[Summary of the invention] In order to achieve the above object, in the present invention, the suction ports of the first and second air coolers facing each other can be closed, and by partially overlapping each other, the exhaust ports can be closed. A pair of partition plates partitioning the air cooler into a substantially triangular shape when viewed from above are rotatably provided at one end of each of the first and second air coolers via a hinge.

[Example of idea]

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2, and the same parts as those in the prior art will be denoted by the same reference numerals and the explanation will be omitted. Note that FIG. 2 is a view of FIG. 1 from above. That is, the difference from the conventional method is that a part of the air discharged from the exhaust port 7 is discharged near the first air cooler 8a, and a part of the air is discharged near the first air cooler 8a. A portion of the air discharged near the cooler 8b is transferred to the first air cooler 8a.
between the first and second air coolers 8a, 8b, that is, the exhaust passage 10
A pair of partition plates 14a and 14b are provided so as to diagonally divide the area into a substantially triangular shape when viewed from above, and each of the partition plates 14a and 14b has one end attached to a hinge 1.
The partition plates 14a and 14b are fixed to the opposite ends of the first and second air coolers 8a and 8b via the partition plates 5a and 15b, respectively, and are rotatable in the direction of the arrow. It is removably fixed to the partition plates 14a, 14b with screws 16a, 16b. Furthermore, the lengths of the partition plates 14a and 14b are as follows:
The width of each of the first and second air coolers 8a, 8b is approximately the same as the width of each of the first and second air coolers 8a, 8b.
After removing a and 16b, remove the partition plates 14a and 14, respectively.
b is rotated so that the suction ports of the first and second air coolers 8a and 8b can be closed by the partition plates 14a and 14b, respectively, as shown by the dashed lines.

Next, the effect will be explained. In this way, the exhaust passage 10
Since the partition plates 14a and 14b are provided in the air cooler 8b, part of the air B out of the air A and B blown by the first ventilation fan 5a and discharged from the exhaust port 7 is transferred to the second air cooler 8b. , and air C, D blown by the second ventilation fan 5b and discharged from the exhaust port 7.
Since some of the air C is cooled by the first air cooler 8a, the air blown by the first and second ventilation fans 5a and 5b is different from each other. Second ventilation fans 5a, 5b
It contains part of the air blown by the Therefore, even if a failure occurs in the second air cooler 8b, for example, some air B that has been cooled by the healthy first air cooler 8a and blown by the first ventilation fan 5a will be replaced by the failed air cooler 8b. The air passes through the second air cooler 8b and is blown to the rotor 4 and stator 6 by the second ventilation fan 5b.
A part of the air C that is blown by the rotor 4 and the stator 6 to cool the rotor 4 and the stator 6 is in a healthy state in the first air cooler 8a.
Since the rotor 4 and the stator 6 are cooled substantially evenly. Therefore, continuous operation can be performed simply by slightly reducing the amount of load applied to the rotating electric machine.

In addition, although the continuous operation time of rotating electric machines differs depending on the installation environment, the two air coolers 8a, 8
1st, 2nd and 3rd in case b fails.
The side plates of the ventilation plates 9, 12a, and 12b may be opened to operate as an open type. In this case, if the respective side plates are simply opened, a portion of the warm air exhausted from the exhaust port 7 will not be cooled, and the first and second air coolers 8a and 8a will be out of order.
8b to the first and second intake ports 11a, respectively.
11b, the rotating electrical machine is no longer cooled, and the temperature of the rotating electrical machine gradually increases. As a result, the rotating electric machine burns out, or if the operation of the rotating electric machine is stopped before the burnout occurs, there is no problem, but on the contrary, the rotating electric machine can only be operated for a short period of time. In this embodiment, the first and second
By blocking the intake ports of the air coolers 8a and 8b, air is prevented from passing through the exhaust port 7 to the first and second air coolers 8a and 8b, respectively. As a result, the warm air discharged from the exhaust port 7 mixes with the surrounding air and is cooled.
Cooled air is sucked through the intake port, and the temperature rise in the rotating electrical machine is alleviated. Therefore, cooling efficiency during open operation can be increased, and long-term operation is possible.

[Effect of idea]

In this way, the present invention provides a pair of partition plates that obliquely divide the exhaust passage formed between the first and second air coolers into a substantially triangular shape when viewed from above, respectively. Since it is rotatable via a hinge, even if either the first or second air cooler fails, the rotor and stator can be cooled almost equally, reducing the amount of load placed on the rotating electric machine. In addition to being able to operate continuously by reducing the amount slightly, if both the first and second air coolers fail, the intake port of the air cooler can be blocked even if the air cooler is operated in an open state.
The warm air discharged from the exhaust port mixes with the surrounding air and is cooled. As a result, the rotating electric machine is cooled with the cooled air, increasing the cooling effect and allowing long-term operation. It becomes possible.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing a conventional rotating electrical machine, Figure 2
The figure is a partially cutaway plan view of the main parts of an embodiment of the rotating electrical machine of the present invention. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 3... Frame, 4... Rotor, 5a... First ventilation fan, 5b... Second ventilation fan, 6... Stator, 7... Exhaust port, 8a
...First air cooler, 8b... Second air cooler, 10... Exhaust passage, 14a, 14b... Partition plate.

Claims (1)

[Scope of utility model registration request] A frame is provided with an exhaust port in the upper center part for discharging air that has cooled the rotor and stator, and a frame is mounted on the frame and provided in the axial direction across the exhaust port to cool the air discharged from the exhaust port. First thing to do
and a second air cooler;
In a rotating electric machine comprising first and second ventilation fans that blow air cooled by an air cooler to a rotor and a stator in an axial direction facing each other, the 1st and 2nd
A pair of partition plates which can block the suction ports of the air coolers, and partition the exhaust ports into a substantially triangular shape when viewed from above by partially overlapping each other, are connected to the first and second air cooling units respectively. A rotating electric machine characterized by being rotatably provided at one end of a container via a hinge.