JPH06197495A - Totally-enclosed rotating electric machine - Google Patents

Abstract

PURPOSE:To prevent exhaust from mixing in cooling air, fetched from suction ports, by respectively arranging exhaust ports in a position adjacent to a heat exchanger and the suction ports in a predetermined position distant from the exhaust ports in a frame unit having the suction ports and the exhaust ports opened at the time of stopping the heat exchanger. CONSTITUTION:Exhaust ports 25, 25 and suction ports 21, 21 are arranged respectively in a position adjacent to a heat exchanger 14 in a frame unit 27 and in a predetermined position distant from the exhaust ports 25, 25. At the time of stopping the heat exchanger 14, suction port doors 23, 23 and exhaust port doors 26, 26 are opened, and the outside air is sucked from the suction ports 21, 21 by fans 12, rotated by driving a rotor 13, to obtain cooling air. This cooling air, cooling a stator 9 and the rotor 13, is discharged from the exhaust ports 25, 25. In this way, exhaust can be prevented from mixing in the cooling air introduced from the suction ports.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully-closed rotary electric machine, and more particularly to improvement of cooling air passages.

[0002]

2. Description of the Related Art FIG.
FIG. 5 is a cross-sectional view showing the configuration of the conventional fully-closed rotary electric machine disclosed in Japanese Patent Publication No. 9 and FIG. 5 is a cross-sectional view showing an operating state when the heat exchanger is stopped in the fully-closed rotary electric machine of FIG. In the figure, 1
Is a stator frame having openings formed at both ends and a discharge port 1a in the center, and 2 is a pair of partition walls arranged at a predetermined distance from both ends of the stator frame 1 and has a predetermined center portion. Diameter opening
2a is formed. Reference numeral 3 denotes a pair of inlets formed between both ends of the stator frame 1 and the partition wall 2, and 4 denotes the stator frame 1.
A pair of end frames 5 arranged at both ends of the end frame 5 to close the opening are bearings attached to the end frame 4. Then, the first frame 6 is formed by the above 1 to 5. Reference numeral 7 is a stator core attached to the stator frame 1, and 8 is a stator coil attached to the stator core 7. Then, the stator 9 is formed by the above 7, 8. 10 is a rotor shaft whose both ends are rotatably supported by bearings 5 and 5 of the first frame 6, and 11 is a rotary shaft which is mounted on the rotor shaft 10 with a predetermined distance from the iron core 7 of the stator 9. The child 12 is a pair of fans fixed to the rotor shaft 11 between the rotor 11 and the bearing 5, and is arranged at a position corresponding to the opening 2a of the partition wall 2. Then, the rotor 13 is formed by the above 10 to 12. Reference numeral 14 is a heat exchanger attached to the discharge port 1a of the stator frame 1, and 15 is a cover for covering the intake port 3 and the heat exchanger 14 and
Second frame body connected to the frame body 6 of FIG. 1, 16 and 16 are intake ports provided at both ends of the second frame body 15, and 17 and 17 can be opened and closed to close the intake ports 16 and 16, respectively. Intake door, 18,
18 is an exhaust port provided at a predetermined interval between the intake ports 17, and 19 and 19 are openable / closable exhaust port doors that close the exhaust ports 18 and 18, respectively.

Next, the operation will be described. In the fully-closed rotary electric machine, in the driving state in which the refrigerant is supplied to the heat exchanger 14, as shown in FIG. 4, the intake port 17 and the exhaust port door 19 block the intake port 16 and the exhaust port 18. Be driven. In this operation, the fan 12 that is rotated integrally with the rotor 13 generates circulating air toward the stator 9 and the rotor 13 that are heat generating parts, and the circulating air cools the heat generating part to discharge the air from the outlet 1a. The circulating air, which is sent from the heat exchanger 14 to the heat exchanger 14 and whose temperature has risen by cooling the heat generating portion, is cooled by the heat exchanger 14 and diverted to both ends along the inner surface of the second frame 15, and the intake port 3 Flows into the inside of the stator frame 1 and is again sent as cooling air by the fan 12 to the stator 9 and the rotor 13, and thereafter, the circulating cooling is repeated. Further, when the heat exchanger 14 is stopped due to a failure in which the refrigerant cannot be supplied to the heat exchanger 14, the intake door 17 and the exhaust door 19 are opened to operate as shown in FIG. To be done. In this operation, the outside air is taken in through the intake port 16 through the intake port 3 which becomes negative pressure due to the rotation of the fan 12,
This outside air is sent as cooling air to the stator 9 and the rotor 13 by the fan 12, and the cooling air cools the stator 9 and the rotor 13. Then, the cooling air whose temperature has risen by cooling the heat generating portion passes through the heat exchanger 14 from the discharge port 1a,
It is exhausted to the outside air from the exhaust port 18.

[0004]

In the conventional fully-closed rotary electric machine, the intake port 16 and the exhaust port 18 are the second frame 15 as described above.
Since the heat exchanger 14 is stopped and the intake port 17 and the exhaust port door 19 are opened, the cooling air taken in from the intake port 16 is exhausted from the exhaust port 1a. There was a problem that was mixed. Further, since the outside air is directly sucked and used as the cooling air, there is a problem that dust contained in the cooling air adversely affects the rotating electric machine and the inside of the machine is contaminated with the dust.

The present invention has been made in order to solve the above-mentioned problems, and prevents the exhaust air from being mixed in the cooling air taken in from the intake port, and prevents dust from being mixed in the cooling air. The object is to obtain a fully enclosed rotating electric machine that can be prevented.

[0006]

In a fully enclosed rotating electric machine according to claim 1 of the present invention, the exhaust port of the second frame is located at a position close to the heat exchanger, and the intake port is separated from the exhaust port by a predetermined distance. It is arranged at each position. Further, in the fully-closed rotating electric machine according to claim 2 of the present invention, the exhaust port of the second frame is arranged at a position close to the heat exchanger, and the intake port is arranged at a position apart from the exhaust port. It is provided with a filter for covering.

[0007]

The intake port of the fully-closed rotary electric machine according to claim 1 of the present invention takes in outside air as cooling air without being influenced by the exhaust gas. Further, the intake port of the fully-closed rotary electric machine according to claim 2 of the present invention removes dust from the outside air and takes in air.

[0008]

EXAMPLES Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing a configuration of a fully-closed rotary electric machine according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view showing an operating state of the fully-closed rotary electric machine of FIG. 1 when a heat exchanger is stopped. In the figure, the reference numerals 1, 2, 4, 57 to 14 are the same as the conventional ones, and therefore their explanations are omitted. 20 and 20 are a pair of intakes formed between the stator frame 1 and the partition walls 2 and 2,
1, 21 are intake ports formed at positions facing the intake ports 20, 20, and these stator frame 1, partition wall 2,
2, a first frame 22 is formed by the intake ports 20, 20, the intake ports 21, 21, the end frame 4, and the bearing 5. Reference numerals 23 and 23 denote inlet and outlet doors that can be opened and closed to close the inlets 21 and 21; 24, covers that cover the inlets 20 and 20 and the heat exchanger 14 and that are connected to the first frame 22; Is an exhaust port formed in the cover 24, and 26 and 26 are openable and exhaustable doors for closing the exhaust ports 25 and 25. Then, the second frame 27 is formed by the above 24 to 26.

Next, the operation will be described. In the fully-closed rotary electric machine in which the intake port 21 is arranged at a predetermined position apart from the exhaust port 25 as described above, in the driving state in which the refrigerant is supplied to the heat exchanger 14, as shown in FIG. In addition, the intake port 21 and the exhaust port 25 are closed by the intake port door 23 and the exhaust port door 26, and the stator 9 and the rotor 13 are cooled by the circulating air generated by the fan 12 to generate heat. The circulating air whose temperature has risen by cooling is cooled by the heat exchanger 14, and the circulating air whose temperature has been lowered is drawn into the stator frame 1 through the inlet 3 as cooling air, and again as cooling air by the fan 12. After being fed to the stator 9 and the rotor 13, the circulation cooling is repeated thereafter. Further, in a stopped state of the heat exchanger 14 in which the refrigerant is not supplied to the heat exchanger 14, as shown in FIG. 2, the intake port door 23 and the exhaust port door 26 are opened to operate. In this case, the fan 12 rotated by the drive of the rotor 13 sucks the outside air from the intake ports 21 at both ends to form cooling air, and the cooling air cools the stator 9 and the rotor 13 and joins them to exchange heat. It passes through the container 14, passes through the inside of the second frame 27, and is discharged from the exhaust ports 25, 25 to the outside air.

According to the first embodiment configured as described above, the intake port 21 is arranged at a predetermined position apart from the exhaust port 25, so that the exhaust gas is mixed with the cooling air introduced from the intake port 21. To be prevented.

Embodiment 2. Second Embodiment FIG. 3 is a sectional view showing the structure of a fully-closed rotary electric machine according to a second embodiment of the present invention. In the figure, the same parts as those in the first embodiment shown in FIG. 28 is a wind tunnel connecting both intake ports 21 and 21, 29 is an intake port formed in a part of the wind tunnel 28, 30 is an openable / closable intake door for closing the intake port 29, 31 is an intake port 29
It is a filter attached to.

According to the second embodiment configured as described above, since the filter 31 is provided at the intake port 29, the dust contained in the cooling air introduced from the intake port 29 can be removed, and the rotary electric machine can be installed. It is possible to prevent adverse effects. In addition, since the air inlets 21 are connected to each other by the wind tunnel 28 and the air inlet 29 is provided in the wind tunnel 28, only one filter 31 is required.

Embodiment 3. In the second embodiment, the filter 31 for removing dust is arranged in the single intake port 29, but as shown in the first embodiment, the filters 31 may be arranged in both the intake ports 21 and 21, respectively. The same effect as in Example 2 is exhibited.

[0014]

As described above, according to the first aspect of the present invention, the exhaust port of the second frame is located at a position close to the heat exchanger.
Since the intake port is arranged at a predetermined position apart from the exhaust port, it is possible to obtain the effect of preventing the exhaust gas from being mixed into the outside air taken in from the intake port and used as cooling air. Also,
According to claim 2 of the present invention, the exhaust port of the second frame is arranged at a position close to the heat exchanger, the intake port is arranged at a predetermined position apart from the exhaust port, and the intake port is covered. Since the filter is provided, it is possible to obtain the same effect as that of the first aspect, and to obtain the cooling air from which the dust contained in the outside air is removed.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a fully-closed rotary electric machine according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing an operating state of the fully-closed rotary electric machine of FIG. 1 when the heat exchanger is stopped.

FIG. 3 is a sectional view showing a configuration of a fully-closed rotary electric machine according to Embodiment 2 of the present invention.

FIG. 4 is a cross-sectional view showing a configuration of a conventional fully-closed rotary electric machine.

5 is a cross-sectional view showing an operating state when the heat exchanger is stopped in the fully-closed rotary electric machine of FIG.

[Explanation of symbols]

 1 Stator frame 1a Exhaust port 12 Fan 13 Rotor 14 Heat exchanger 20 Intake port 21 Inlet port 22 First frame 23 Inlet door 25 Exhaust port 26 Exhaust port door 27 Second frame

Claims (2)

[Claims] 1. A first frame having an inlet at an end portion and an outlet at a central portion is housed, and a heat generating portion is cooled by cooling air introduced from the inlet by rotating a fan and discharged from the outlet. And a heat exchanger provided at a position corresponding to the discharge port, covering the intake port, the discharge port and the heat exchanger, and being connected to the first frame body, In a fully-closed rotating electric machine having an intake port that is opened when the heat exchanger is stopped and a second frame body having an exhaust port, the exhaust port of the second frame body is located close to the heat exchanger. In addition, a fully-closed rotary electric machine characterized in that the intake port is arranged at a predetermined position apart from the exhaust port. 2. A first frame having an inlet at an end and an outlet at a central portion is housed, and a heat generation part is cooled by cooling air introduced from the inlet by rotation of a fan and discharged from the outlet. And a heat exchanger provided at a position corresponding to the discharge port, covering the intake port, the discharge port and the heat exchanger, and being connected to the first frame body, In a fully-closed rotating electric machine having an intake port that is opened when the heat exchanger is stopped and a second frame body having an exhaust port, the exhaust port of the second frame body is located close to the heat exchanger. And a filter provided at the intake port, wherein the intake port is arranged at a predetermined position apart from the exhaust port.