JP2538549B2 - Heat exchange device for cooling air of double armature type rotary electric machine - Google Patents

Description

Detailed Description of the Invention TECHNICAL FIELD OF THE INVENTION

The present invention includes two independent rotors mounted on a common shaft and two independent armatures as well as two independent cooling air circulation fans arranged adjacent to each other. The present invention relates to a heat exchange device for cooling air of a double armature type fully-closed internally-cooled rotary electric machine including an electric machine. Since this type of cooling air heat exchanging device is usually arranged on the outer cover of the electric machine, it is required that the structure is as simple and light as possible.

[Prior art and its problems]

Generally, in the case of constructing a rotary electric machine and because of restrictions on the installation location and control reasons, it is divided into two independent rotary electric machines and each rotor is mounted on a common shaft. It may be a rotating electric machine. In this type of rotary electric machine, when the cooling system is a fully closed internal cooling system, a partition 4 is usually provided between the two electric machines 1a and 1b arranged adjacent to each other as shown in FIG. , Electric machines 1a, 1b
A fan 2 for circulating cooling air inside the electric machines 1a, 1b at a portion of the shaft 2 common to the two adjacent to the partition 4.
Provide a and 2b for each electric machine. Further, the electric machines 1a, 1b
The wind tunnels 9a and 9b are provided on the fully closed type outer jackets 8a and 8b,
The heat exchangers 7a, 7b are arranged inside the wind tunnels 9a, 9b, respectively, and the wind tunnels 9a sandwich the heat exchangers 7a, 7b so that the exhaust side ventilation ducts 10a and the air supply side ventilation ducts 11a have a wind. The body 9b is divided into an exhaust side ventilation duct 10b and an air supply side ventilation duct 11b. In the fully-closed internally-cooled double-armature type rotary electric machine configured as described above, the cooling air sent into the inside by the fans 3a and 3b is the respective rotors 5a, 5b.
b and the armatures 6a, 6b are cooled to raise the temperature, and each wind tunnel
From the exhaust side ventilation ducts 10a, 10b of 9a, 9b to the heat exchangers 7a and 7b
After entering, the wind tunnel 9a, after being cooled in the heat exchanger 7a, 7b,
Electric machine 1a, 1 through air supply side ventilation ducts 11a and 11b of 9b
Return to the inside of b. As described above, in the cooling air heat exchange device in which the wind tunnel and the heat exchange are provided for each of the electric machines 1a and 1b, since all the facilities are provided for each of the electric machines, the piping for the heat exchangers 7a and 7b is provided. There is a drawback in that the number of parts required for the apparatus including the above is extremely large, and therefore the weight applied to the outer cover of the electric machine also becomes large.

[Object of the invention]

The present invention has been conceived in view of the above-mentioned drawbacks of a heat exchange device for cooling air in a double armature type fully-closed internally-cooled rotary electric machine in which two rotors are mounted on a common shaft and have two armatures. It is an object of the present invention to provide a heat exchange device for cooling air of the electric machine, which is simpler and lighter.

[Points of the Invention]

To achieve the above object, in the present invention, in the heat exchange device for cooling air as set forth in the above, one wind tunnel common to both of the two totally closed internal cooling type rotary electric machines is provided, and the inside of the wind tunnel is provided. Two heat exchangers are arranged side by side so that the cooling air can pass in the opposite direction in the portion corresponding to the partition at approximately the center of the two, and the exhaust of one of the two electric machines is the two of the electric machines. Supply air to the other electric machine after passing through one of the heat exchangers, and supply air to the other electric machine after the exhaust gas from the other electric machine passes through the other of the two heat exchangers. By providing a partition inside the wind tunnel so that
By providing a partition inside the wind tunnel so that cooling air can circulate in series in both electric machines, the same cooling air is circulated and cooled in the two electric machines.

Examples of the invention

Next, the details of the present invention will be described based on the embodiments shown in the drawings. In FIG. 1, a partition 4 is provided between two fully-closed internally-cooled rotary electric machines 1a, 1b which are arranged adjacent to each other and whose rotors 5a, 5b are mounted on a common shaft 2. Fans 3a and 3b for circulating cooling air inside the electric machines 1a and 1b are provided in a portion of the electric machine 1a and 1b close to the partition 4, respectively. Further, a wind tunnel 12 common to both electric machines 1a and 1b is provided on the outer covers 8a and 8b for full closure.
1 is provided, and the wind tunnel 12 is divided into two chambers as shown in FIG. 2 at approximately the center of the wind tunnel 12, and two heat exchangers are provided so that cooling air can be passed in parallel. Place 13a and 13b side by side. Further, including the heat exchanger 13a therein, one side of the heat exchanger 13a is supplied to the exhaust port of the one electric machine 1a, and the other side of the heat exchanger 13a is supplied to the other electric machine 1b. A ventilation duct 15a connected to the mouth and the heat exchanger 13b are included inside, and one side of the heat exchanger 13b is an exhaust port of the other electric machine 1b, and the other side of the heat exchanger 13a is the one side. A hook-shaped partition (14) is provided inside the wind tunnel (12) so that a ventilation duct (15b) connected to the air supply port of the electric machine (1a) is formed. By forming the independent and parallel ducts 15a and 15b each including the heat exchanger 13a or 13b inside one commonly provided wind tunnel 12 as described above, the rotary electric machine 1a The air sent by the fan 3a and cooled to heat the rotor 5a and the armature 6a and heated up enters the ventilation duct 15a inside the wind tunnel 12 from the exhaust port of the electric machine 1a again while passing through the heat exchanger 13a. The fan of the electric machine 1b is cooled through the air supply port of the electric machine 1b.
Attracted inside by 3b. Electric machine by Juan 3b
The air drawn into the inside of 1b cools the rotor 5b and the armature 6b to raise the temperature, then enters the ventilation duct 15b inside the wind tunnel 12 from the exhaust port of the electric machine 1b, and passes through the heat exchanger 13b. In the meantime, the air is cooled again, and is drawn into the inside of the electric machine 1a from the air supply port of the electric machine 1a by the fan 3a to become the cooling air of the electric machine 1a again. As described above, the same cooling air is formed by the respective fans 3a and 3b provided inside the rotary electric machines 1a and 1b, and the ventilation duct 15a formed inside the common wind tunnel 12 and the heat arranged inside the ventilation duct 15a are formed. After passing through the heat exchanger 13a and the ventilation duct 15b and the heat exchanger 13b arranged therein, as shown by solid arrows and broken arrows in FIGS. 1 and 2, both electric machines 1a and 1b are connected. By cooling the inside of the rotating electric machines 1a and 1b by cooling them by circulating the inside in series, the heat exchange device for cooling air arranged on the outer cover of the electric machines without lowering the cooling efficiency. It is possible to achieve a simple structure and reduce the weight.

【The invention's effect】

As described above, the present invention has two independent rotors mounted on a common shaft and two independent armatures, and is provided with individual cooling air circulation fans and arranged adjacent to each other. In a heat exchanging device for a cooling air of a double armature type fully-closed internal cooling type rotary electric machine comprising two electric machines, a wind tunnel common to the two fully-closed internal cooling type rotary electric machines is provided. Two heat exchangers are provided inside the wind tunnel so that the cooling air can pass in the opposite direction, and the exhaust of one of the two electric machines is the heat exchange of the two electric machines. To be supplied to the other electric machine after passing through one of the two heat exchangers, and to be supplied to the one electric machine after passing through the other of the two heat exchangers from the exhaust of the other electric machine. By allowing the cooling air to circulate in series inside both electric machines, An effect that may be lighter and save the number of components, including piping for without cooling simplifies the configuration of the air heat exchanger and the heat exchanger to reduce the cooling efficiency of the internal both electromechanical.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a double armature type fully-closed internal cooling type rotary electric machine equipped with a heat exchange device for cooling air of the present invention, and FIG. 2 is cooling air viewed in the P direction of FIG. FIG. 3 is a vertical cross-sectional schematic view of a double armature type fully enclosed internal cooling type rotary electric machine equipped with a conventional heat exchanger for cooling air. 1a, 1b: rotary electric machine, 2: common shaft, 3a, 3b: fan, 5a, 5b:
Rotor, 6a, 6b: Armature, 12: Wind tunnel, 13a, 13b: Heat exchanger, 1
4: Partition, 15a, 15b: Ventilation duct.

Claims (1)

(57) [Claims] 1. An independent rotor having two independent rotors mounted on a common shaft and two independent armatures, each having an independent fan for cooling air circulation. A double-armature-type heat exchanger for cooling air of a fully-closed internally-cooled rotary electric machine, which comprises two electric machines which are covered by a fully-closed jacket and are arranged adjacent to each other. A common wind tunnel is provided on the fully-enclosed casing of the internally-cooled rotary electric machine, and the cooling air can pass in a reverse direction to a portion corresponding to the partition at substantially the center of the inside of the wind tunnel. As described above, the two heat exchangers are arranged side by side, and the exhaust gas of one of the two electric machines passes through one of the two heat exchangers and then becomes the supply air of the other electric machine. After the exhaust of the other electric machine passes through the other of the two heat exchangers, the one electric machine Of the double armature type rotary electric machine characterized in that cooling air can be circulated in series in both electric machines by providing a partition inside the wind tunnel so as to supply air. Heat exchange device for cooling air.