WO1999041822A1

WO1999041822A1 - Open type electric motor for driving vehicle

Info

Publication number: WO1999041822A1
Application number: PCT/JP1999/000617
Authority: WO
Inventors: Hiroaki Mita; Seikichi Masuda; Hayato Imai
Original assignee: Hitachi, Ltd.
Priority date: 1998-02-13
Filing date: 1999-02-12
Publication date: 1999-08-19
Also published as: CN1290420A; CN1205726C; JP3211826B2

Abstract

An open type electric motor for driving vehicle capable of extending a maintenance circuit, comprising a stator frame (1) storing therein a stator (2), a rotor (3) disposed inside the stator (2), and a fan (11) disposed on a rotating shaft (6) of the rotor (3) and being covered at both axial sides thereof by brackets (7 and 8), respectively, wherein a cooling air inlet (13) is disposed in the bracket (7), a first cooling air exhaust port (14) is disposed in the bracket (7) or rotor frame (1), a second cooling air vent port (15) is disposed in the bracket (8) or rotor frame (1), an annular projected part (17) is formed on the bracket (7) or inner periphery of the rotor frame (1) opposedly to the outside diameter of the fan (11), and the opening part of the first exhaust port (14) is disposed between the projected part (17) and the bracket (7).

Description

Specification

Open motors for vehicle driving

The present invention relates to an open-type electric motor for driving a vehicle, and more particularly to an open-type electric motor for driving a vehicle that is suitable for removing dust contained in cooling air. Background art

As a conventional open-type motor for driving a vehicle, those disclosed in JP-A-6-6958 and US Pat. No. 5,000,769 are known. When the outside air, which is cooling air, was taken into the machine, the former motor was taken in through a filter provided at the air inlet to remove dust contained in the cooling air. When taking in the outside air, which is cooling air, into the machine, the latter motor is taken in through two rooms separated by a flat plate having a plurality of round holes or louver-shaped holes, and is included in the cooling air. Dust had been removed. Disclosure of the invention

The former motor is the mainstream of open-type motors for vehicle driving, but recently there have been various demands on this motor, such as prolonged maintenance return and low noise. High demands. This demand is high because, in the former motor, dust that cannot be removed by the filter penetrates into the machine due to the incomplete removal function of the filter, which accumulates in the machine over a long period of operation, and this is removed. This is because it is necessary to disassemble and clean every 5 or 6 years to remove it.

Therefore, the inventor can remove dust without using a filter. We focused on the latter motor as an open-type motor for driving vehicles. However, since the latter motor forms two rooms, it is necessary to increase the size of the motor in the axial direction, and the structure for removing dust becomes complicated, which may increase the fault potential. There is also. In addition, since the dust contained in the cooling air is removed through the two rooms, the room closer to the cabin cannot be omitted. If the room close to the cabin is omitted, the dust contained in the cooling air will enter the cabin and accumulate in the cabin over a long period of operation. Is required.

Also, in the latter motor, the cooling air intake is opened in a direction perpendicular to the radial direction, so that the incoming cooling air bends in a direction perpendicular to the inlet direction. For this reason, the loss of cooling air increases, and it is necessary to increase the diameter of the cooling fan in order to secure the amount of air required for cooling. If the diameter of the cooling fan is too large, noise will be noticeable.

Also, since the latter motor does not consider the exhaust side of the cooling air at all, there is a problem that the high-temperature cooling air that has cooled the interior of the machine directly hits the bearing cover and raises the temperature of the bearing device on the exhaust side. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the first of its typical objects is to provide an open-type motor for driving a vehicle, which can extend maintenance return. The second of the typical purposes is to provide a highly reliable open-type motor for vehicle drive that can extend maintenance return without increasing the failure potential. The third typical purpose is to provide an open-type motor for driving a vehicle, which can improve the cooling efficiency of the bearing device on the exhaust side of the cooling air, for example, suppress the temperature rise.

An open-type electric motor for driving a vehicle according to a first invention of the present application includes a stator provided inside a stator frame, a rotor provided inside the stator, and a rotating shaft of the rotor. Bearing, a bracket provided at an end of the stator frame, and a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket comprises a stator frame and a bearing. The fan has a shape that protrudes toward the anti-core side between the device and the fan. .

An open-type motor for driving a vehicle according to a second invention of the present application includes a stator provided inside a stator frame, a rotor provided inside the stator, and a bearing device for supporting a rotating shaft of the rotor. And a bracket provided at the end of the stator frame, and a fan provided at the rotating shaft between the rotor and the bearing device. An outer peripheral surface extending toward the direction opposite to the iron core, an inner peripheral surface extending substantially from the connection with the bearing device toward the opposite axial core, and a side surface provided between the outer peripheral surface and the inner peripheral surface. The fan and the fan are provided on the bracket side of the fan main plate, the fan main plate including a portion parallel to the side surface portion of the bracket and an inclined portion from the parallel portion to the connection portion with the rotating shaft, and the outer peripheral surface portion of the bracket. Fan placed in the space surrounded by the inner peripheral surface and side surface It consists of vanes.

The open-type motor for driving a vehicle according to the third invention of the present application is a bearing device that supports a stator provided inside a stator frame, a rotor provided inside the stator, and a rotating shaft of the rotor. And a bracket provided at an end of the stator frame, and a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket is provided between the stator frame and the bearing device. The fan has a shape protruding toward the anti-core side, and the fan is composed of a fan main plate provided at an angle to the bracket side and a fan van provided at the bracket side of the fan main plate.

An open-type motor for driving a vehicle according to a fourth invention of the present application includes a stator provided inside a stator frame, a rotor provided inside the stator, and a rotating shaft of the rotor. Bearing, a bracket provided at the end of the stator frame, and a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket comprises a stator frame and a bearing. The fan has a shape that protrudes toward the anti-core side between the fan and the fan. A separation plate for cooling air is provided on the outside diameter side of the.

An open-type electric motor for driving a vehicle according to a fifth invention of the present application includes a stator provided inside a stator frame, a rotor provided inside the stator, and a bearing device for supporting a rotating shaft of the rotor. And a bracket provided at an end of the stator frame, and a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket is provided between the stator frame and the bearing device. The fan has a shape protruding toward the anti-core side, and the fan consists of a fan main plate and a fan van provided on the bracket side of the fan main plate and arranged in the space where the bracket overhangs. A cooling air inlet is provided on the side.

A vehicle drive-open type electric motor according to a sixth aspect of the present invention includes a stator provided inside a stator frame, a rotor provided inside the stator, and a bearing device for supporting a rotating shaft of the rotor. And a bracket provided at an end of the stator frame, and a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket is provided between the stator frame and the bearing device. The fan has a shape that protrudes toward the anti-core side, and the fan is composed of a fan main plate and a fan fan provided on the bracket side of the fan main plate and arranged in the space where the bracket protrudes. A cooling air intake port is provided on the side, and an outlet for cooling air containing dust is provided on the outer diameter side of the fan vane.

In the vehicle driving motor according to the fourth invention, the separation plate is a ring-shaped plate having an inner diameter larger than the outer diameter of the fan main plate. Fifth or In the open-type motor for driving a vehicle according to a sixth aspect of the present invention, the distance between the inner diameter side of the fan vane and the air inlet is 3 O ram or more. Further, the number of fan vanes and the number of the air inlets are set to numbers that cannot be divided. In the open-type motor for driving a vehicle according to the first to sixth inventions, an auxiliary fan is provided on a cooling air discharge side. The auxiliary fan shall be one whose main plate extends radially along the shape of the bearing cover provided on the cooling air discharge side.

An open-type motor for driving a vehicle according to a seventh invention of the present application is a motor having a stator, a rotor provided inside the stator, and a fan provided on a rotating shaft of the rotor. Closed by a bracket, one side of the bracket is provided with a cooling air inlet, one side of the bracket or the stator frame is provided with a first cooling air outlet, and the other side of the bracket or fixed A second exhaust port for cooling air is provided in the slave frame, and an annular projection is formed on one of the brackets or on the inner periphery of the stator frame so as to face the outer diameter side of the fan. The opening of the first exhaust port is arranged between the part and one of the brackets.

An open-type electric motor for driving a vehicle according to an eighth invention of the present application is a motor for driving a stator, which includes a stator, a rotor provided inside the stator, and a fan provided on a rotating shaft of the rotor. Closed by a bracket, one side of the bracket is provided with a cooling air inlet, one side of the bracket or the stator frame is provided with a first cooling air outlet, and the other side of the bracket or fixed A second exhaust port for cooling air is provided in the slave frame, and an annular protrusion is formed on one side of the bracket or on the inner periphery of the stator frame so as to face the outer diameter side of the fan. The opening of the first exhaust port is located between the first exhaust port and one of the brackets, and the second inlet port provided on the first exhaust port and the second exhaust port side. Communicate them A ventilation tube is provided.

In the open-type electric motor for driving a vehicle according to the seventh or eighth invention, the member comprises a separation plate including a separation plate for separating outside air taken in from the air inlet into outside air containing dust and outside air containing no dust. Mechanism. One first outlet is provided on one outer peripheral surface of the bracket. One of the brackets has a concave portion on the center side and a plurality of air inlets on the inner peripheral surface of the concave portion.

An open-type motor for driving a vehicle according to a ninth invention of the present application is a bearing device that supports a stator provided inside a stator frame, a rotor provided inside the stator, and a rotating shaft of the rotor. And a bracket provided at the end of the stator frame, a fan provided on the rotating shaft between the rotor and the bearing device, an air inlet for taking in outside air into the machine, It has a first exhaust port for exhausting outside air to the outside of the machine, and a member that extends to the inside diameter is provided at a portion facing the outside diameter of the fan, and this member is also provided inside the machine at the outside portion. A second exhaust port is provided to discharge the outside air taken into the outside of the machine.

An open-type electric motor for driving a vehicle according to a tenth aspect of the present invention includes a stator provided inside a stator frame, a rotor provided inside the stator, and a bearing device for supporting a rotating shaft of the rotor. And a bracket provided at the end of the stator frame, a fan provided on the rotating shaft between the rotor and the bearing device, an air inlet for taking in outside air into the machine, and an air intake into the machine A first exhaust port for discharging outside air to the outside of the machine, a member that extends toward the inside diameter is provided at a portion facing the outside diameter side of the fan, and this member is also an outside portion. A second exhaust port for exhausting outside air taken into the machine to the outside of the machine, and ventilation for communicating the second exhaust port with the second air inlet provided on the first exhaust port side A tube is provided. In the open-type motor for driving a vehicle according to the ninth or tenth aspect, the member is configured such that the outside air taken in from the air inlet is free of dust and outside air. This is a separation mechanism that includes a separation plate that separates from outside air.

The open-type motor for driving a vehicle according to the first invention of the present application includes a stator, a rotor positioned inside the stator, one or two fans provided on a rotation shaft of the rotor, and The housing includes a housing formed so as to be housed therein, and a closing member for closing one or both sides of the housing in the axial direction. The closing member may also serve as a part of the housing. Open the trachea, open at least two vents or exhaust pipes in the obstruction or housing, place one of the vents or exhaust pipes on the intake or inlet side, and the other exhaust or exhaust pipe. Is installed so that it is located on the opposite side in the axial direction from the air inlet or the air inlet pipe.

In the open-type motor for driving a vehicle according to the first invention, the air inlet or the exhaust hole on the air inlet side is the second air outlet or the second air hole opened on the exhaust pipe side outside the housing. Communicate with air inlet or air pipe.

An open-type electric motor for driving a vehicle according to the first and second aspects of the present invention includes a stator, a rotor provided inside the stator, a housing surrounding the stator, a rotating shaft of the rotor, and both sides of the housing. A closing member, a fan provided on a rotating shaft between one of the closing members and the stator and the rotor, an air inlet provided on one of the closing members, and a first opening on one of the closing members or the housing. An exhaust hole is provided, and a second exhaust hole is provided in the other of the closing member or the housing, and an air flow that travels substantially straight from the intake hole to the first exhaust hole by the fan and an air flow that is diverted to the stator and the rotor It forms a flow.

An open-type motor for driving a vehicle according to the first to third aspects of the present invention includes a stator, a rotor provided inside the stator, a housing surrounding the stator, a rotation shaft of the rotor, and both sides of the housing. A closing member; and a fan provided on a rotating shaft between one of the closing members and the stator and the rotor. One side is provided with an air inlet, one of the closing members or the housing is provided with a first exhaust hole, and the other of the closing member or the housing is provided with a second exhaust hole. An air flow almost straight to the exhaust hole and an air flow splitting to the stator and the rotor are formed, and the air flow almost straight to the first exhaust hole is between the other of the closing members and the stator and the rotor. It leads to the space of.

In the open-type electric motor for driving a vehicle according to the first or second invention, the airflow almost going straight to the first exhaust hole contains dust, and the airflow diverted to the stator and the rotor is dust. Not included.

The open-type motor for driving a vehicle according to the first to fourth aspects of the present invention includes a stator, a rotor provided inside the stator, a stator frame surrounding the stator and the rotor, and both ends of the stator frame. It has a bracket to close, an air inlet provided on one side of the bracket, and an exhaust port provided on the other side of the bracket, and cooling air is blown into the space between one side of the bracket and the stator and rotor. A first fan to be taken into the bracket is arranged, and a second fan is arranged in a space between the other of the brackets and the stator and the rotor.

In the open-type electric motor for driving a vehicle according to the first to fourth aspects, the second fan is attached to the rotating shaft, and is formed so as to become farther from the rotor as the distance from the mounting portion in the radial direction increases. is there. A current plate may be used as the second fan. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional view showing a configuration of an open-type motor for driving a vehicle according to a first embodiment of the present invention. FIG. 2 is an external view showing the upper external configuration of FIG. FIG. 3 is an external view showing the external configuration of the left side of FIG. Figure 4 shows FIG. 2 is an external view showing an external configuration on the right side of FIG. 1. FIG. 5 is a cross-sectional view showing a configuration of an open-type motor for driving a vehicle according to a second embodiment of the present invention. FIG. 6 is an external view showing an upper external configuration of FIG. FIG. 7 is an external view showing an external configuration on the left side of FIG. FIG. 8 is an external view showing the external configuration on the right side of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

FIGS. 1 to 4 show an open-type electric motor for driving a vehicle according to a first embodiment of the present invention. The open-type motor for driving a vehicle according to the present embodiment is a three-phase induction motor. In the drawings, reference numeral 1 denotes a cylindrical stator frame (or housing or casing), and a cylindrical stator core 2 is provided on an inner peripheral side thereof. A plurality of slots continuous in the axial direction are formed in the inner peripheral portion of the stator core 2 at predetermined intervals in the circumferential direction, and the stator windings 4 are accommodated therein.

On the inner peripheral side of the stator core 2, a rotor core 3 is provided concentrically with the stator core 2 via a gap. A plurality of slots continuous in the axial direction are formed at predetermined intervals in the circumferential direction on the outer peripheral portion of the rotor core 3, and the rotor windings 5 are housed by a casting method. A rotating shaft 6 is provided on the center axis of the rotor core 3, and is rotatably supported by bearings 9 and 10 provided at both ends of the stator frame 1.

On one side of the stator frame 1 (on the inlet side of the cooling air, which is on the left side in the figure toward the iron core), an annular end bracket 7 as a closing member is provided, and on the inner peripheral side of the end bracket. The bearing device 9 is fixedly supported. The end bracket 7 has a shape that protrudes toward the non-core side between the end of the stator frame 1 and the outer peripheral side of the bearing device 9. Specifically, an outer peripheral surface portion 7a extending substantially in the axial direction and opposite to the core (or substantially horizontal) from a connection portion with the end of the stator frame 1; The inner peripheral surface 7b, which extends almost in the axial direction opposite to the iron core (or slightly oblique or almost horizontal with respect to the rotating shaft 6) from the peripheral connection, and the outer peripheral surface and the inner peripheral surface are joined to extend almost vertically And has a side surface portion 7c. The portion corresponding to the outer peripheral surface portion 7a of the end bracket 7 may also serve as the stator frame 1.

A main fan 11 is provided on a rotating shaft 6 between the rotor core 3 and the bearing device 9. The main fan 11 includes a fan main plate 11a, a fan vane 11b, and a side plate 11c. The fan main plate 11a extends along the inner peripheral surface of the end bracket 7 to the side opposite to the iron core, is curved, and extends radially outward along the side surface of the end bracket 7. In other words, it is formed so as to move away from the rotor core 3 as it moves radially away from the mounting portion. Specifically, it has a shape having a parallel portion to the side surface portion of the end platform 7 and an inclined portion which curves from the parallel portion and extends to the connection portion of the rotating shaft 6. A plurality of fan vanes 11b are provided on the end bracket 7 side of the parallel portion of the fan main plate 11a. A side plate 11c is provided on the end bracket 7 side of the fan vane 11b. In addition, the end bracket 7 may be used as the side plate 11c.

The air inlet 13 (or air inlet or air inlet) for taking in outside air as cooling air is arranged almost linearly with the fan vane 11 b on the inner peripheral surface 7 b of the end bracket 7. As shown in FIG. 1, it is located on the inner diameter side 11 d of the fan 11 b. A space of at least 3 is provided between the inlet 13 and the inner diameter side of the fan vane 1 1b. On the outer peripheral surface 7a of the end bracket 7, a dust outlet 14 (or a dust outlet or a dust outlet) for discharging cooling air containing dust is arranged almost linearly with the fan vane 1 1b. And one as shown in Fig. 1. The fan vane 1 1b is located on the outer diameter side 1 1e. The number of fan vanes 1 1b and the number of air inlets 13 are a combination of numbers that are not divisible (no common divisor other than 1). The axial position of the bearing device 9 is on the iron core side or at the same position as the fan vane 11b.

In order to separate the cooling air containing dust and the cooling air containing no dust on the outer diameter side 11 f of the fan main plate 11a, to prevent the cooling air containing the separated dust from flowing into the machine. A dust separator 17 is provided as one of the separation mechanisms. Here, the outer diameter side refers to the circumferential end side of the outer shape of the fan formed so as to gradually open outward. Therefore, the separating mechanism such as a separating plate is not an end itself, but an annular projection formed so as to face the end, and as shown in FIG. It is located on the outer diameter side of the fan main plate 11a.

The dust separating plate 17 is a ring-shaped disk having a larger inner diameter than the outer diameter of the fan main plate 11a. In addition, the dust separating plate 17 may be formed integrally with the end bracket 7. The ventilation cross section of the air gap between the outer diameter of the fan main plate 11 a and the inner diameter of the dust separation plate 17 is larger than the ventilation cross section of the dust outlet 14.

On the other side of the stator frame 1 (on the exhaust side of the cooling air and on the right side facing the iron core in the figure), an annular end bracket 8 as a closing member is formed integrally with the stator frame 1. A bearing device 10 is fixedly supported on the inner peripheral side. A plurality of exhaust ports 15 (or exhaust holes or exhaust pipes) are provided on the side of the end bracket 8 for discharging the cooling air having cooled the inside of the machine to the outside of the machine. A filter 19 is provided outside the exhaust port 15 so that dust does not enter the machine through the exhaust port 15. According to the present embodiment, the case where the stator frame 1 and the end bracket 8 are integrated has been described. Frame 1 and end bracket 8 can be separate. Further, the end bracket 8 may also serve as a part of the stator frame 1, that is, the end bracket 8 may be a container having one open.

An auxiliary fan 12 is provided at the end of the rotor core 3 on the bearing device 10 side. The auxiliary fan 12 includes a fan main plate 12a, a fan vane 12b and a side plate 12c. The fan main plate 12 a is curved along the curved shape of the bearing cover 16 of the bearing device 10, and extends radially outward along the end bracket 8. In other words, it is formed so as to become farther from the rotor core 3 as it becomes farther in the radial direction from the mounting portion. A plurality of fan vanes 12b are provided on the iron core side of the fan main plate 12a. A side plate 12c is provided on the iron core side of the fan vane 12b. In addition, the auxiliary fan 12 may omit the side plate 12c. Further, instead of the auxiliary fan 12, the fan main plate 12 a from which the fan vane 12 b is omitted may be used as a shielding plate.

A grease supply device 20 for supplying grease to the bearing device 9 is provided outside the end bracket 7. A grease supply device 21 for supplying grease to the bearing device 10 and a speed detection device 24 for detecting the rotation speed of the rotating shaft 6 are provided outside the end bracket 8. One end of the end portion of the stator winding 4 is connected to three phases of a lead wire 23 penetrating through the stator frame 1 and drawn into the machine. The lead wire 23 is for supplying electric power to the stator winding 4.

At the outer periphery of the stator frame 1, mounting parts 25 and 26 for mounting to the bogie are provided. A support stand 27 for supporting the lead wire 23, the ground wire 28 of the inverter, and the signal line of the speed detector 24 is provided on the outer periphery of the stator frame 1. The ground wire 22 of the motor is connected to the support 27. Next, the flow of cooling air in the open-type motor for driving a vehicle according to the present embodiment will be described. The arrows shown in FIG. 1 indicate the flow of cooling air. When the main fan 11 rotates due to the rotation of the rotating shaft 6, a suction force acts on the space between the inner diameter side of the fan vanes 1 1b and the air inlet 13 and cooling air flows from the air inlet 13 through the air inlet 13. Some outside air is sucked in. The sucked outside air is pushed toward the inner surface of the outer peripheral surface of the end bracket 7 by the pushing force of the main fan 11. At this time, the dust separating plate 17 separates the two cooling winds in the space between the outer diameter side of the fan vane 11 b and the end bracket 7.

One of the separated cooling winds contains dust, which flows on the inner surface on the outer peripheral side of the end bracket 7 and flows in the circumferential direction on the inner surface on the outer peripheral side of the end bracket 7 by the rotational force of the main fan 11. It reaches the discharge port 14 and is discharged outside the machine. At this time, the cooling air containing dust does not flow into the machine due to the dust separating plate 17 serving as a wall.

The other cooling air that has been separated does not contain dust, and is pushed into the iron core through a gap between the inner diameter side of the dust separation plate 17 and the outer diameter side of the fan main plate 11a. The cooling air pushed in cools one end of the stator core 2 and the rotor core 3, and the gap between the stator core 2 and the rotor core 3 and the axial direction provided in the rotor core 3 are plural. It flows to the exhaust side while cooling the continuous ventilation duct 18. The cooling air that has reached the exhaust side cools the other ends of the stator core 2 and the rotor core 3 and is discharged out of the machine through the exhaust port 15. At this time, since the auxiliary fan 12 is rotating by the rotation of the rotating shaft 6, air flows in the space at the other end of the stator core 2 and the rotor core 3.

According to the first embodiment described above, the cooling air pushed by the main fan 11 is divided into two cooling airs by the dust separating plate 17, that is, a cooling air containing dust and a cooling air not containing dust. Cooling air containing dust is Dust-free cooling air is discharged from the outlet 14 to the outside of the machine and pushed into the machine through the gap between the inner diameter side of the dust separating plate 17 and the outer diameter side of the fan main plate 11a. Therefore, the inside of the machine can be cooled by the dust-free cooling air, which prevents dust from entering the inside of the machine and accumulating dust due to long-term operation. Therefore, periodic disassembly and cleaning are not required, and maintenance return can be extended.

According to the first embodiment, the end bracket 7, the main fan 11, and the end bracket 7 are provided on the end bracket 7 facing the outer diameter side of the fan main plate 11 a of the main fan 11. In the space surrounded by the dust separating plate 17, the cooling air containing dust and the cooling not containing dust can be separated, so that the mechanism for removing dust can be configured more easily than the conventional one. The failure potential can be reduced. Therefore, reliability can be improved.

Further, according to the first embodiment, the ventilation cross-sectional area of the gap between the outer diameter side of the fan main plate 11 a and the inner diameter side of the dust separation plate 17 is determined by the ventilation cross-section area of the dust outlet 14. As the air flow is increased, the amount of cooling air pushed into the machine through the gap can be increased and the air speed can be reduced, and the amount of cooling air discharged from the dust outlet 14 can be reduced and the air speed can be increased. . Therefore, the cooling air containing dust can be reliably discharged from the dust outlet 14 having a high wind speed, and the inside of the machine can be cooled by a large amount of cooling air, so that the above effect can be improved.

Further, according to the first embodiment, the end bracket 7 has a shape protruding toward the non-iron core side, and the fan main plate 11 a of the main fan 11 has a shape along the end bracket 7, Since a fan vane 1 lb is provided on the end bracket 7 side of the fan main plate 11a, the main fan 11 can be installed on the rotating shaft 6 between the rotor core 3 and the bearing device 9, and the axial direction The length can be shortened. Therefore, the size and weight of the motor can be reduced.

Further, according to the first embodiment, the inlet 13 and the fan van 1 1 b Are arranged almost linearly, so that the ventilation loss of the cooling air taken in through the air inlet 13 can be reduced, and the required amount of cooling air can be easily secured even if the diameter of the main fan 11 is reduced. it can. Therefore, the noise of the motor can be reduced.

Also, according to the first embodiment, the distance between the inner diameter side of the fan vane 11 b and the air inlet 13 is set to 3 O ram or more. Noise generated in the space between the air inlets 13 can be reduced. In other words, the noise of the fan is the sound of the fan vanes cutting the air, which is caused by the air density. Here, considering the noise of the main fan 11, the noise of the main fan 11 is generated from the space between the inlet 13 and the fan van 11 b. This is due to the change in air density between the portion with 13 and the portion without the inlet 13. However, this noise can be reduced by increasing the spatial distance between the inlet 13 and the fan vane 11b, thereby reducing the change in air density. Therefore, in the first embodiment, the above-described effect is improved by leaving a space distance at which the effect of the reduction is remarkable, that is, 30 or more bandages.

According to the first embodiment, the number of fan vanes 1 1b and the number of inlets 13 are not divisible by each other (no common divisor other than 1). As a result, the level of noise generated in the space between the fan vanes 11 b and the air inlet 13 can be reduced. For example, assuming that the number of inlets is 12 and the number of fans is 15 and 17, in the combination of 12 and 15, there are 3 in addition to 1 in common divisor. At three locations of 120 ° out of 0 °, the positions (phases) of the fan vane and the air inlet become exactly the same, and the noise is strengthened and the noise level is raised. On the other hand, in the combination of 12 and 17, since the common divisor does not exist except for 1, the position (phase) of the fan vane and the air inlet are all different at 360 ° around one round, and the noise cannot be strengthened. Noise level can be reduced.

The noise generated when the number of fan vanes is Nb, the number of inlets is Ns, the common divisor of the number of fan vanes and the number of inlets is M, and the number of revolutions is rpm. The frequency f of

f = N b X rpm X M / 60 (Hz)

Or

f = N s X rpm X M / 60 (H z)

Then, the combination of 12 and 15 has a common divisor of 1, 3 and thus generates noise having frequencies of 12, 20, 15, 36, and 45 times. On the other hand, the combination of 12 and 17 has a common divisor of 1 and therefore generates noise with a frequency of 12 times and 17 times. Here, if a certain portion constitutes a tube, and the length of the tube is L, the wavelength of resonance in the tube becomes 4 L, 4 L / 2, 4 L / 3, 4 LZ4… The combination of 12 and 15 with high sound generation frequency tends to resonate easily and increase the noise level. However, the combination of 12 and 17 with low noise generation frequency can reduce resonance and reduce noise level. Therefore, the above effects can be further improved.

Further, according to the first embodiment, since the auxiliary fan 12 is provided at the end of the rotor core 3 on the bearing device 10 side, air flows into the space between the core and the end bracket 8. Then, the heat of the high-temperature cooling air can be suppressed from being trapped in the space, and the temperature rise of the bearing device 10 can be suppressed.

According to the first embodiment, the fan main plate 12a of the auxiliary fan 12 is formed along the bearing cover 16 of the bearing device 10 so that the fan main plate 12a and the bearing cover 16 are The negative pressure in this air gap can be increased by reducing the air gap between them, increasing the amount of cooling air flowing in the radial direction and increasing the fan main plate 12a. Heat from the bearing cover 16 can be more easily dissipated. Therefore, the temperature rise of the bearing device 10 can be further suppressed. In addition, since the amount of cooling air flowing in the radial direction can be increased, the diameter of the main fan 11 can be reduced, and the noise can be further reduced.

FIGS. 5 to 8 show an open-type motor for driving a vehicle according to a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the end bracket 7 and the dust separation plate 17 which is one of the separation mechanisms described in the first embodiment are integrated, and the end bracket facing the outer diameter side of the fan main plate 11a is integrated. The connecting portion of the Dopplet 7 with the stator frame 1 protrudes toward the inner diameter side. That is, the protrusion 7 d is formed. The side plate of the main fan 11 is omitted, and the side wall 7c of the end bracket 7 is substituted.

A dust outlet 14 is provided between the dust outlet 14 provided on the outer peripheral surface of the end bracket 7 and one inlet 29 provided on the outer peripheral portion of the stator frame 1 on the bearing device 10 side. A ventilation tube 30 is provided to supply cooling air containing dust discharged from the space to the space between the iron core and the end bracket 8. In the present embodiment, the plurality of outlets 15 for the cooling air after cooling the inside of the machine are not provided on the end bracket 8 but on the outer peripheral portion of the stator frame 1 on the same peripheral surface as the inlet 29. Are provided so as to be arranged in the same location.

In the present embodiment, a rectifying plate 31 is provided at the end of the rotor core 3 on the bearing device 10 side instead of the auxiliary fan 12 described in the first embodiment. The current plate 31 has a shape that is inclined radially outward from the end of the rotor core 3 so that the cooling air flowing through the ventilation duct 18 can be guided radially outward. In other words, it is formed so as to move away from the rotor core 3 as it moves radially away from the mounting portion. According to the second embodiment described above, the dust outlet 14 provided on the outer peripheral surface of the end bracket 7 and the inlet provided on the outer peripheral portion of the stator frame 1 on the bearing device 10 side are provided. The ventilation pipe 30 is provided between the cooling air and the cooling air containing dust. The cooling air can be supplied to the discharge side of the cooling air, that is, the space between the iron core and the end bracket 8 through the pipe 30. In this way, the space between the iron core and the end bracket 8 can be cooled by the cooling air containing dust, which has a lower temperature than the cooling air that does not contain the dust and has flown while cooling the inside of the machine. The cooling effect of the part can be improved as compared with the first embodiment. Since the cooling air containing dust has a smaller air volume than the cooling air not containing dust, after cooling the space between the iron core and the end bracket 8, the cooling air containing no dust and the exhaust air 15 Is discharged out of the aircraft via Therefore, in addition to the effects of the first embodiment, the cooling efficiency can be improved. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, the open-ended motor for vehicle drive which can achieve extension of maintenance return can be provided. Further, it is possible to provide an open-type electric motor for driving a vehicle, which can extend the return to maintenance without increasing the failure potential. Further, it is possible to provide an open-type motor for driving a vehicle, which can improve the cooling efficiency of the bearing device on the exhaust side of the cooling wind, for example, can suppress a rise in temperature.

Claims

The scope of the claims

1. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. And a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket comprises a stator frame and the bearing device. The fan has a shape projecting toward the anti-iron side, and the fan includes a fan main plate, and a fan van provided on the bracket side of the fan main plate and arranged in a space where the bracket projects. An open electric motor for driving a vehicle.

2. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. And a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket is connected to the stator frame from a connection portion with the stator frame. An outer peripheral surface extending substantially toward the axially opposite core; an inner peripheral surface extending substantially toward the axially opposite core from the connection with the bearing device; and a side surface provided between the outer peripheral surface and the inner peripheral surface. A fan main plate including a portion parallel to the side surface portion and an inclined portion extending from the parallel portion to a connection portion with the rotating shaft; and a fan provided on the bracket side of the fan main plate. The outer peripheral surface, the inner peripheral surface, and the side surface Surrounded by the vehicle-driving open if motor to feature in that it consists of the placed fan base one on to the space.

3. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. An open-type motor for driving a vehicle, comprising: a bracket; and a fan provided on a rotating shaft between the rotor and the bearing device. The fan has a shape projecting to the side opposite to the iron core between the stator frame and the bearing device, the fan includes a fan main plate inclined to the bracket side, and the bracket of the fan main plate. An open-type motor for driving a vehicle, comprising a fan van provided on the side.

4. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. And a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket includes a stator frame and the bearing device. The fan has a shape protruding toward the non-iron side, and the fan includes a fan main plate, and a fan van provided on the bracket side of the fan main plate and arranged in a space where the bracket protrudes, An open-type electric motor for driving a vehicle, wherein a cooling air separating plate is provided on an outer diameter side of the fan main plate.

5. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. And a fan provided on a rotating shaft between the rotor and the bearing device, wherein the bracket comprises a stator frame and the bearing device. The fan has a shape protruding toward the non-iron side, and the fan includes a fan main plate, and a fan van provided on the bracket side of the fan main plate and arranged in a space where the bracket protrudes, An open-type electric motor for driving a vehicle, wherein an inlet for cooling air is provided on the inner diameter side of the fan vane.

6. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and a bracket provided at an end of the stator frame. And a fan provided on a rotating shaft between the rotor and the bearing device. In the open-type motor for driving a vehicle, the bracket has a shape projecting toward the non-core side between the stator frame and the bearing device, and the fan includes a fan main plate and A fan vane provided on the bracket side of the fan main plate and arranged in a space where the bracket projects, and an inlet for cooling air is provided on the inner diameter side of the fan vane; An open-type motor for driving a vehicle, wherein an outlet for cooling air containing dust is provided on an outer diameter side of the fan vane.

7. The open-type motor for driving a vehicle according to claim 5, wherein a distance between an inner diameter side of the fan vane and an air inlet is 3 O mm or more.

7. The open-type motor for driving a vehicle according to claim 5, wherein the number of the fan vanes and the number of the air inlets are numbers that are not divisible from each other.

9. The open-type vehicle drive according to claim 4, wherein the separation plate is a ring-shaped plate having an inner diameter larger than an outer diameter of the fan main plate.

10. The open-type motor for driving a vehicle according to any one of claims 1 to 6, wherein an auxiliary fan is provided on a cooling air discharge side.

11. The fan main plate of the auxiliary fan extends radially along a shape of a bearing cover provided on a cooling air discharge side.

10. The open-type electric motor for driving a vehicle according to 10.

12. An open vehicle drive type in which both sides in the axial direction of a stator frame containing a stator, a rotor provided inside the stator, and a fan provided on a rotating shaft of the rotor are closed by brackets. In the motor, one of the brackets is provided with an inlet for cooling air, one of the brackets or the stator frame is provided with a first air outlet for cooling air, and the other of the brackets or the On the stator frame Is provided with a second exhaust port for cooling air, and an annular projection is formed on one of the brackets or on the inner periphery of the stator frame so as to face the outer diameter side of the fan. An open-type electric motor for driving a vehicle, wherein an opening of the first exhaust port is arranged between a portion and one of the brackets.

13. An open vehicle drive type in which both sides in the axial direction of a stator frame containing a stator, a rotor provided inside the stator, and a fan provided on a rotation shaft of the rotor are closed by brackets. In the electric motor, one of the brackets is provided with an inlet for cooling air, one of the brackets or the stator frame is provided with a first air outlet for cooling air, and the other of the brackets or the A second exhaust port for cooling air is provided in the stator frame, and an annular protrusion is formed on one of the brackets or on the inner periphery of the stator frame so as to face the outer diameter side of the fan. An opening of the first exhaust port is disposed between the protrusion and one of the brackets, and a second inlet provided on the first exhaust port and the second exhaust port side. An open type for driving a vehicle, characterized in that a ventilation pipe is provided between the vent and the vent. Electric motor.

14. The member according to claim 12, wherein the member is a separation mechanism including a separation plate that separates outside air taken from the air inlet into outside air containing dust and outside air containing no dust. 13. An open-type electric motor for driving a vehicle according to item 3.

15. The open-type electric motor for driving a vehicle according to claim 12, wherein one of the first discharge ports is provided on one outer peripheral surface of the bracket.

16. The device according to claim 12, wherein one of the brackets has a concave portion on a center portion side, and a plurality of the air inlets are provided on an inner peripheral surface of the concave portion. Open motor for driving vehicles.

17. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting the rotating shaft of the Yoshi rotor, and a stator provided at an end of the stator frame. Beam brackets, a fan provided on the rotating shaft between the rotor and the bearing device, an air inlet for taking in outside air into the machine, and discharging the outside air taken into the machine outside the machine. An open-type motor for driving a vehicle, comprising: a first exhaust port, a member extending to the inner diameter side at a portion facing the outer diameter side of the fan, and a portion extending outside the member. An open-type motor for driving a vehicle, wherein a second exhaust port is provided for discharging outside air taken into the machine to the outside of the machine.

18. A stator provided inside the stator frame, a rotor provided inside the stator, a bearing device for supporting a rotating shaft of the rotor, and provided at an end of the stator frame. A bracket, a fan provided on a rotating shaft between the rotor and the bearing device, an air inlet for taking in outside air into the machine, and an exhaust port for discharging outside air taken into the machine outside the machine. In the open-type motor for driving a vehicle having a first exhaust port, a member extending to the inner diameter side is provided at a portion facing the outer diameter side of the fan, and the in-machine portion is provided at a portion outside the member. A second exhaust port for exhausting outside air taken in to the outside of the machine, and the second exhaust port and the second exhaust port.

An open-type electric motor for driving a vehicle, wherein a ventilation pipe is provided to communicate with a second air inlet provided on an exhaust port side of the first air motor.

19. The member according to claim 17, wherein the member is a separation mechanism including a separation plate that separates outside air taken in from the air inlet into outside air containing dust and outside air containing no dust. 18. An open-type electric motor for driving a vehicle according to item 8.

20. A stator, a rotor positioned inside the stator, one or two fans provided on a rotation shaft of the rotor, a housing formed to incorporate these, and a A closing member that closes one or both sides in the axial direction, the closing member may also serve as a part of the housing, and one of the closing members opens an air inlet or an air inlet pipe, and the closing member or the housing For opening, at least two exhaust holes or exhaust pipes are opened, one of the exhaust holes or exhaust pipes is installed on the intake hole or intake pipe side, and the other exhaust hole or exhaust pipe is installed on the intake port or exhaust pipe. An open-type electric motor for driving a vehicle, wherein the open-type electric motor is provided so as to be located on an opposite side in an axial direction from an intake pipe.

21. The exhaust hole or exhaust pipe on the intake port side or the intake pipe side should exit from the housing and communicate with the second intake port or the intake pipe opened on the second exhaust port or exhaust pipe side. The open-type electric motor for driving a vehicle according to claim 20, characterized in that:

22. A stator, a rotor provided inside the stator, a housing surrounding the stator, a rotation shaft of the rotor, a closing member for closing both sides of the housing, one of the closing members, A fan provided on the rotating shaft between the stator and the rotor, an air inlet provided on one of the closing members, a first exhaust hole provided on one of the closing members or the housing, A second exhaust hole is provided in the other of the closing member or the housing, and an air flow that is substantially straight from the inlet hole to the first exhaust hole by the fan and an air flow that is diverted to the stator and the rotor. An open-type electric motor for driving a vehicle, characterized in that:

23. A stator, a rotor provided inside the stator, a housing surrounding the stator, a rotation shaft of the rotor, a closing member for closing both sides of the housing, one of the closing members, A fan provided on the rotating shaft between the stator and the rotor, an air inlet provided on one of the closing members, a first exhaust hole provided on one of the closing members or the housing, A second exhaust hole is provided in the other of the closing member or the housing, and an air flow that is substantially straight from the inlet hole to the first exhaust hole by the fan and an air flow that is diverted to the stator and the rotor. And the first exhaust hole is An open-type electric motor for driving a vehicle, wherein an airflow that travels straight is guided to a space between the other of the closing member and the stator and the rotor.

24. The air flow that travels substantially straight to the first exhaust hole contains dust, and the air flow that diverges to the stator and the rotor does not contain dust. Open-type electric motor for driving vehicles.

25. A stator, a rotor provided inside the stator, a stator frame surrounding the stator and the rotor, a bracket covering both ends of the stator frame, and one of the brackets A ventilation hole provided on the other side of the bracket and an exhaust hole provided on the other side of the bracket, and a space between one of the brackets and the stator and the rotor for taking in cooling air into the machine. An open-type motor for driving a vehicle, wherein the second fan is disposed in a space between the other of the brackets and the stator and the rotor. .

26. The second fan according to claim 24, wherein the second fan is attached to the rotating shaft, and is formed so as to be distant from the rotor as the radiating distance from the attaching portion is increased. Open-type electric motor for driving the vehicle.

27. The open-type electric motor for driving a vehicle according to claim 25, wherein a current plate is used as the second fan.