WO2000052808A1

WO2000052808A1 - A method of modifying open-type vehicle driving motor

Info

Publication number: WO2000052808A1
Application number: PCT/JP1999/000928
Authority: WO
Inventors: Hiroaki Mita; Seikichi Masuda; Hayato Imai; Shuji Aizawa; Takeshi Hashimoto; Eiki Masaoka; Toshio Nemoto
Original assignee: Hitachi, Ltd.
Priority date: 1999-02-26
Filing date: 1999-02-26
Publication date: 2000-09-08
Also published as: JP3855660B2

Abstract

A method of modifying an open-type vehicle driving motor provided with a housing (2) to hold a stator, a rotor having a suction fan (14) and a rotating shaft (7), a pair of bearing devices (12) and (13) to pivotally support the rotating shaft (7), a closing member (8) installed on one bearing device (12), and a dust filter (22) disposed in an intake air inlet hole (17) formed by the suction fan (14), including the processes specified below: 1) removal of the dust filter (22) and closing member (8) from the housing (2); 2) replacement of the suction fan (14) with a forced draft fan (15); 3) installation on the bearing device (12) of a closing member (9) which surrounds the forced draft fan (15), has an air inlet hole (18), and forms a dust discharge hole (21) in cooperation with the housing (2); 4) formation of an air discharge hole (19) at a position corresponding to the air inlet hole (17) in the housing (2).

Description

Specification

Modification method of open type motor for vehicle drive

The present invention relates to a method for remodeling an open-type motor for driving a vehicle with a dust filter, and to a remodeling for an open-type motor for driving a vehicle which essentially eliminates the need for a dust filter and extends maintenance and inspection periods. It provides a method. Background technology

2. Description of the Related Art As a conventional open-type motor for driving a vehicle, those disclosed in JP-A-6-6958 and U.S. Pat. No. 5,000,769 are known. When the outside air is taken into the machine, the former is taken in through a dust filter provided in the air inlet to remove dust contained in the outside air. The latter motor takes in outside air through two rooms separated by a flat plate having a plurality of round holes or louver-shaped holes to remove dust contained in the outside air. Is what you do.

The former motor is the mainstream as an open-type motor for driving a vehicle, but recently there is a high demand for extending the maintenance return to the former motor. The reason is that the dust removal function of the dust removal filter in the former motor is incomplete, so dust that cannot be removed by the dust removal filter enters the machine and accumulates in the machine over a long period of operation. This was because it was necessary to perform disassembly and cleaning every 5 or 6 years.

Therefore, the present inventor paid attention to the latter motor that can remove dust without a dust filter. However, with the latter motor, which has two rooms, Requires large dimensions in the axial direction, complicates the structure for removing dust, and may increase the failure potential. In addition, the dust removal function cannot be fully exhibited unless two rooms pass through, so the room closer to the cabin cannot be omitted. If the room close to the cabin is omitted, the dust contained in the outside air will enter the cabin and accumulate in the cabin over a long period of operation, requiring periodic disassembly and cleaning like the former motor. .

Also, in the latter motor, in which the outside air intake hole is opened in a direction perpendicular to the radial direction, the outside air that has entered is bent in a direction perpendicular to the direction of intake, so that the ventilation loss increases, It is necessary to increase the diameter of the cooling fan to secure the air volume. If the diameter of the cooling fan is too large, the noise will be noticeable.

Also, with the latter motor, which does not consider the exhaust side of the cooling air at all, the high temperature cooling air that has cooled the interior of the machine directly hits the bearing cover, and the temperature of the bearing device on the exhaust side rises. Disclosure of the invention

The present invention has been made in view of the above circumstances, and provides a method for converting an existing open-type motor for driving a vehicle with a dust filter to a motor capable of removing dust without a dust filter. It also provides a method that can convert existing open-type motors for driving vehicles with dust filters to motors that can extend maintenance return. It also provides a method to convert an existing open motor for vehicle drive with a dust filter into a highly reliable motor that can extend maintenance return without increasing the failure potential. In addition, the present invention provides a method for improving the cooling efficiency of a bearing device on the exhaust side of a cooling wind, for example, a motor that can be modified into an open-type electric motor for driving a vehicle, which can suppress a rise in temperature. The basic feature of the present invention is to make the best use of the fact that the suction fan of an existing open-type motor for driving a vehicle with a dust filter is mounted in a closing member bulging in the axial direction of the motor. It is. The feature is that the suction fan and the push fan are exchanged in the installation space for the suction fan. As a result, the direction of the air flow circulating in the cabin is opposite to the conventional direction.

A method for remodeling an open-type motor for driving a vehicle according to the first invention includes a housing 1 for holding a stator, a rotor having a suction fan 14 and a rotating shaft 7, and a pair of bearing devices 1 for supporting the rotating shaft 7. 2, 1 3, one of the bearing devices 12 and a vehicle drive opening equipped with a dedusting filter 1 2 installed in the intake air inlet 17 formed by the suction fan 14 and the suction fan 14 Modification of the die motor involves the following steps.

(1) Remove the dust filter 1-2 and the blocking member 8 from the housing 1.

(2) Replace suction fan 14 with push fan 15.

(3) A closing member 9 that surrounds the push-in fan 15, has an air inlet 18, and forms a dust exhaust hole 21 with the housing 2 is attached to the bearing device 12.

(4) An exhaust hole 19 is formed in the housing 2 at a position corresponding to the intake hole 17.

A method for remodeling an open-type motor for driving a vehicle according to a second invention includes a housing 1 for holding a stator, a rotor having a suction fan 14 and a rotating shaft 7, and a pair of bearing devices 1 for supporting the rotating shaft 7. 2, 13 and an open-type motor for driving a vehicle equipped with a dust-removing filter 22 installed in an intake hole 17 formed by a closing member 8 attached to one of the bearing devices 12 and an intake fan 14. This involves the following steps.

(1) Remove the dust filter 1 2 2 from the housing 1. (2) Replace suction fan 14 with push fan 15.

(3) The opening / closing member 8 is replaced with a closing member 9 that surrounds the push-in fan 15, has the air inlet 18, and forms the dust exhaust hole 21 together with the housing 2.

(4) Attach the closing member 9 to the bearing device 12.

(5) An exhaust hole 19 is formed at a position corresponding to the intake hole 17 of the housing 2.

The method for modifying an open-type motor for driving a vehicle according to the first or second invention is characterized in that the airflow impinges on the bearing device 13 near the bearing device 13 on the side corresponding to the exhaust hole 19. A step of attaching the means for preventing the rotation to the rotating shaft 7 directly or via another member. The means for preventing the collision of the air flow with the bearing device 13 is the fan 16.

In the method for modifying an open-type motor for driving a vehicle according to the first or second invention, the push-in fan 15 includes a fan main plate 15a on the stator side and a fan vane 1 on the side opposite to the stator. 5 b. Further, the housing 2 and the closing member 9 after the remodeling may use the housing 1 and the closing member 8 before the remodeling to form the air inlet 18 and the exhaust hole 19. Further, if the closing member 10 attached to the bearing device 13 is removable, the closing member 11 may be replaced at the time of the above modification. Alternatively, it may be used as it is, and may be selected as appropriate.

In the remodeling method of the open-type motor for driving a vehicle according to the first or second aspect of the invention, reference numerals corresponding to those in the drawings are provided, but the reference numerals are provided for easy understanding of the gist of the invention. And does not limit the scope of the invention.

According to a third aspect of the present invention, there is provided a method for modifying an open-type motor for driving a vehicle, comprising: a rotor having a stator and a suction fan in a first housing having an intake / exhaust hole; The first housing is closed, and one side of the first housing is closed with a closing member, and an open-type motor for driving a vehicle, in which a dust filter is attached to the air inlet, is remodeled. The pushing fan provided so as to be on the core side is replaced with the suction fan, and the stator and the rotor having the pushing fan are housed in a second housing having an exhaust hole. One side of the second housing is closed by a closing member having an air inlet formed so as to face the outer side, a dust discharge hole formed so as to face the outer diameter side of the pushing fan, and an annular protrusion. Through a series of steps.

According to a fourth aspect of the present invention, there is provided a method for remodeling an open-type motor for driving a vehicle, comprising: storing a stator having a stator and a rotor having a suction fan in a first housing having an intake / exhaust hole; And a push-in fan provided with a fan vane so as to be on the side opposite to the iron core of the main plate of the fan. The stator and the second fan are exchanged with a suction fan, and the stator and the second fan are provided in a second housing having an exhaust hole, a dust exhaust hole formed to face an outer diameter side of the pushing fan, and an annular protrusion. Is carried out through a series of steps of accommodating a rotor having an opening and closing one side of the second housing with a closing member having an air inlet formed so as to face the inner diameter side of the pushing fan. In things That.

According to a fifth aspect of the present invention, there is provided a method for remodeling an open-type motor for driving a vehicle, wherein a stator having a stator and a rotor having a suction fan is accommodated in a housing having an intake / exhaust hole, and one side of the housing is a first closing member. The motor is an open-type motor for driving a vehicle in which a dust filter is attached to the air inlet, and a fan vane is provided on the side opposite to the iron core of the fan main plate. The suction fan is exchanged with the suction fan, and an exhaust hole of the cooling air using the air inlet and a dust exhaust hole using the exhaust hole are formed in the housing, and are opposed to an outer diameter side of the push fan. In this manner, the housing is formed with an annular protruding portion, and the second closing member having an air inlet formed to face the inner diameter side of the pushing fan and the first closing member are exchanged. This is done through a series of steps.

According to a sixth aspect of the present invention, there is provided a method for remodeling an open-type motor for driving a vehicle, comprising: housing a rotor having a stator and a suction fan in a housing having an intake / exhaust hole; For remodeling an open-type electric motor for driving a vehicle in which a dust filter is attached to the air inlet, wherein a fan van is provided so as to be on the non-core side of a fan main plate and the suction fan. A fan is exchanged, and an exhaust hole using the air inlet is formed in the housing, and an air inlet formed so as to face an inner diameter side of the pushing fan and an outer diameter side of the pushing fan are formed so as to face the outer diameter side of the pushing fan. This is performed through a series of steps of exchanging the first closing member with the second closing member having the dust exhaust hole and the annular protrusion.

In the method for modifying an open-type motor for driving a vehicle according to the third to sixth aspects of the present invention, the annular projection may include an annular dust separating member having an inner diameter larger than an outer diameter of the pushing fan. The cooling air flow straightening plate provided on the first housing is provided or processed by processing the cooling air flow straightening plate provided on the first housing. On the side corresponding to the exhaust hole provided in the second housing, there is provided means for preventing air from colliding with the bearing device in proximity to the bearing device. This means is a fan or a current plate.

The method for modifying an open-type motor for driving a vehicle according to the third to sixth aspects of the present invention may further comprise: an inlet hole formed on the exhaust port side of the second housing; A pipe for communicating with the exhaust hole is provided. Further, the number of fan vanes of the push-in fan and the number of air holes formed in the closing member are a combination of numbers that are indivisible. Further, the space distance between the inner diameter side of the fan vane of the pushing fan and the air inlet formed in the closing member is set to 30 mm or more.

In the above, the `` first '' attached to the front of the housing or closing member indicates that it is the motor before modification, and the `` second '' is that of the motor after modification. Show.

According to a seventh aspect of the present invention, there is provided a method of modifying an open-type motor for driving a vehicle, wherein the stator has a stator and a rotor having a push-in fan on one side of a rotary shaft in a storage container having an inlet / outlet hole. This is a modification of the open-type motor, in which an auxiliary fan is installed on the other side of the rotating shaft. In the method for modifying an open-type motor for driving a vehicle according to a seventh invention, a rectifying plate may be attached instead of the auxiliary fan.

According to the method for modifying a closed-release motor for driving a vehicle according to the first to sixth aspects of the invention, by performing the modification, the motor is included in the outside air taken into the machine without a dust filter. It is possible to obtain an open-type motor for driving a vehicle that can remove dust and can be cooled by outside air that does not contain in-machine dust. Therefore, it is possible to solve the problem of providing a method that can be modified into an electric motor capable of removing dust without a dust filter. In addition, it is possible to solve the problem of providing a method that can be modified into an electric motor in which maintenance return is prolonged. In addition, the open-type vehicle drive according to the seventh aspect of the present invention can solve the problem of providing a highly reliable electric motor that can be extended in maintenance return without increasing a failure potential by a method that can be modified. According to the motor remodeling method, by performing the above-mentioned remodeling, the bearing device on the exhaust side of Thus, an open-type electric motor for driving a vehicle can be obtained in which the cooling air directly hits and the heat of the high-temperature cooling air can be suppressed from being trapped in the space. Therefore, it is possible to improve the cooling efficiency of the bearing device on the cooling air exhaust side, for example, to suppress a rise in temperature. It is possible to solve the problem of providing a method that can be modified into an open-type motor for driving a vehicle. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view showing the structure of an open-type motor for driving a vehicle according to an embodiment of the present invention, showing the structure after modification. 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. FIG. 4 is an external view showing the external configuration of the right side of FIG. FIG. 5 is a work process diagram showing a procedure for modifying an open-type motor for driving a vehicle according to an embodiment of the present invention. 6 to 19 are cross-sectional views showing a modified state of the open-type motor for driving a vehicle along the work process diagram of FIG. FIG. 20 is a cross-sectional view showing the structure of an existing open-type motor for driving a vehicle with a dust filter, showing the structure before the remodeling method of the present invention is applied. BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 20 are drawings for explaining a method of modifying an open-type motor for driving a vehicle according to the present invention, and FIGS. 1 to 4 show the structure of the open-type electric motor for driving a vehicle after the modification. Fig. 5 shows the modification procedure, Fig. 6 to Fig. 19 show the modification state according to the modification procedure in Fig. 5, Fig. 20 shows the existing vehicle drive with dust filter 1 shows the structure of an open electric motor.

First of all, the existing open-type electric motor with a dust filter The structure will be described with reference to FIG. The open-type motor for driving a vehicle according to the present embodiment is a three-phase induction motor. In the drawing, 1 is a cylindrical stator frame

(Or stator frame or casing), and a cylindrical stator core 3 is provided inside. A plurality of slots continuous in the axial direction are formed at predetermined intervals in the circumferential direction on the inner peripheral portion of the stator core 3, and the stator windings are accommodated therein.

On the inner peripheral side of the stator core 3, a rotor core 5 is provided concentrically with the stator core 3 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 winding 6 is accommodated therein. A rotating shaft 7 is provided on the center axis of the rotor core 5, and is rotatably supported by bearing devices 12 and 13 provided on both axial sides of the stator frame 1. A plurality of continuous ventilation ducts 25 are formed in the rotor core 5 at predetermined intervals in the circumferential direction in the axial direction at a portion on the inner diameter side of the slot storing the rotor windings 6.

On one axial side of the stator frame 1 (on the exhaust side of the cooling air, on the left side with respect to the stator core 3 and the rotor core 5), a stator, a rotor, and a suction fan 14 described later were housed. In this state, an annular end bracket 8 (or closing member) for closing one side is provided. A bearing device 12 is fixedly supported on the inner peripheral side of the end bracket 8. The end bracket 8 has a shape projecting to the side opposite to the iron core between the connection portion of the stator frame 1 and the connection portion of the bearing device 12.

The rotary shaft 7 between the rotor core 5 and the bearing device 12 is provided with a suction fan 14. The suction fan 14 includes a fan main plate 14a, a fan vane 14b, and a side plate 14c. The fan main plate 14a is an annular member extending radially along the shape of the end bracket 8, in other words, a rotor iron. It is an annular member formed so as to become more distant from the rotor core 5 as it moves radially away from the fixed part of the iron core retainer 26 of the core 5. A plurality of fan vanes 14b as wing members are provided on the iron core side of the fan main plate 14a. A side plate 14c, which is an annular member, is provided on the iron core side of the fan vane 14b.

Cooling air discharge holes 20 (or exhaust pipes) are provided almost all around the stator frame 1 facing the outer diameter side of the fan vanes 14 b of the suction fan 14. An annular rectifying plate 28 extending radially inward is provided on the inner peripheral surface of the stator frame 1 facing the side plate 14 c of the suction fan 14. The current plate 28 is for stabilizing the flow of the cooling air toward the discharge port 20, and its inner diameter is slightly larger than the outer diameter of the side plate 14c.

The other end of the stator frame 1 in the axial direction (on the cooling air inlet side and on the right side with respect to the stator core 3 and the rotor core 5) is a ring-shaped endplate 10 that closes its end. (Or closing member). The end bracket 10 is formed integrally with the stator frame 1 (or formed separately), and has a bearing device 13 fixedly supported on the inner peripheral side thereof. The stator frame 1 that faces one side of the coil end of the stator winding 4 projecting into the space between the stator core 3 and the end bracket 10 Trachea).

A filter for removing dust contained in the cooling air (outside air) taken into the machine through the air inlets 17 at the air inlet 17 on the outer peripheral side of the stator frame 1

22 is provided. A grease supply device 23 for supplying grease to the bearing device 12 is provided outside the end bracket 8. A speed detecting device 24 for detecting the rotation speed of the rotating shaft 7 is provided outside the end bracket 10.

In the motor with the above structure, the rotation of the suction fan 14 The cooling air (outside air) is taken into the machine from the air inlet 1 により through the filter 1 2 2 by the suction force generated. At this time, the dust contained in the cooling air is removed by the filter 122, but its function has not been sufficient conventionally, and dust that cannot be removed by the filter 122 due to the long-term operation of the motor enters the machine. accumulate. The cooling air taken into the machine flows through the inside of the machine to the exhaust side while cooling the iron core and the like, and is discharged out of the machine through the discharge holes 20.

Next, the remodeling procedure of the existing open-type motor for driving a vehicle with a dust filter and the structure of the open-type motor for driving a vehicle after the remodeling will be described with reference to FIGS. 1 to 19. . In the following description, the existing open motor for driving a vehicle with a dust filter is called the old motor, and the modified open motor for driving the vehicle is called the new motor. Parts similar to those of the open-type motor for driving a vehicle shown in FIG. 20 are denoted by the same reference numerals. The remodeling procedure described below is merely an example for understanding the present invention, and there are many remodeling methods in addition to the following examples. Therefore, it goes without saying that the scope of the present invention is not limited to the procedures described below.

(Modification procedure 100)

Remove the external components such as the old motor's filter 22, speed detector 24, and grease supply device 23 (see Fig. 6).

(Modification procedure 1 1 0)

Remove the end bracket 8 and the bearing unit 12 from the stator frame 1 of the old motor (see Fig. 7).

(Modification procedure 1 2 0)

Remove bearing device 12 from end bracket 8 (see Fig. 8).

(Modification procedure 1 3 0)

Replace the bearing device 12 removed in the remodeling procedure 120 with the end Here, the end bracket 9 is attached to the connecting bracket 9 of the stator frame 2 as shown in FIG. 1 (see FIG. 9).

It is an annular member that protrudes toward the non-core side between the connection portion and the connection portion of the bearing device 12. Specifically, the outer peripheral surface 9a extends almost horizontally from the connection of the stator frame 1 to the side opposite to the core in the axial direction, and the inner peripheral portion 9a extends from the connection of the bearing device 12 to the side opposite to the core in an oblique radial direction. It is composed of a peripheral surface portion 9b, and a side surface portion 9c extending substantially perpendicularly by connecting the outer peripheral surface portion 9a and the inner peripheral surface portion 9b. The portion corresponding to the outer peripheral surface portion 9a may also serve as the stator frame 2.

In addition, the end bracket 9 has a discharge hole 21 (or a discharge hole) for discharging cooling air containing dust on an outer peripheral surface portion 9a facing an outer diameter side of a fan vane 15b of a push fan 15 described later. One exhaust pipe), and multiple intake holes 18 (or intake pipes) for taking in cooling air (outside air) at the inner peripheral surface 9 b facing the inner diameter side of the fan vane 15 b. It is a thing. In addition, the fan vanes 15b, the inlet holes 18 and the outlet holes 21 of the push-in fan 15 described later are arranged substantially on the same straight line when the end bracket 9 is mounted on the stator frame 2. It has become so. When the stator frame 2 also serves as the portion corresponding to the outer peripheral surface portion 9a, one discharge hole 21 is provided in the stator frame 2 portion facing the outer diameter side of the fan vane 15b.

The end bracket 9 is provided with a dust separating member 9 d which is an annular protruding portion protruding toward the inner diameter side at an outer peripheral surface portion 9 a facing the outer diameter side of the fan main plate 15 a of the push-in fan 15 described later. It is a thing. The inner diameter of the dust separating member 9 d is larger than the outer diameter of the fan main plate 15 a of the pushing fan 15 described later, and the cross-sectional area of the gap sandwiched therebetween, that is, the cooling air passage area is the outer peripheral surface 9 a. It is designed to be larger than the ventilation area of the air inlet 21 provided in the air hole. The dust separation member 9 d is integrated with the end bracket 9. However, the rectifying plate 28 provided on the old motor may be machined and attached to the above-mentioned portion. In addition, as a modification procedure for processing and installing the current plate 27, before removing the stator core 3 from the stator frame 1 of the old motor described later, remove the current plate 28 and process it, After the stator core 3 is mounted on the rectifier plate 28, which has been machined, is installed.

(Modification procedure 140)

Remove the rotor, that is, the one consisting of the rotor core 5, the rotor winding 6, the rotating shaft 7, the suction fan 14, and the iron core retainers 26, 27 from the stator frame 1 of the old motor (No. See Figure 10).

(Modification procedure 150)

Modification procedure Remove the suction fan 14 from one side of the rotating shaft 7 of the rotor removed in 140 (see Fig. 11).

(Modification procedure 160)

Remove bearing device 13 from the other side of rotor shaft 7 (see Fig. 12) _c

(Modification procedure 170)

Attach the auxiliary fan 16 to the rotor core retainer 27 (see Fig. 13). Here, the auxiliary fan 16 is composed of a fan main plate 16a, a fan vane 16 and a side plate 16c, as shown in FIG. The fan main plate 16a is an annular member that extends radially outward almost along the shape of the bearing cover 13a of the bearing device 13; in other words, rotates as it moves radially away from the connection of the iron core holder 27. An annular member formed so as to be away from the core 5. A plurality of fan vanes 16b as wing members are provided on the iron core side of the fan main plate 16a. A side plate 16c, which is an annular member, is provided on the iron core side of the fan vane 16b. Note that the side plate 16c of the auxiliary fan 16 may be omitted, or a rectifying plate using only the fan main plate 16a may be used. (Modification procedure 180)

Reinstall the bearing device 13 removed in the remodeling procedure 160 on the other side of the rotating shaft 7 (see Fig. 14).

(Modification procedure 190)

Attach the push-in fan 15 to one side of the rotating shaft 7 of the rotor (see Fig. 15).

As shown in FIG. 1, the push fan 15 is composed of a fan main plate 15a, a fan vane 15h and a side plate 15c. The fan main plate 15a extends along the inner peripheral surface 9b of the end bracket 9 to the side opposite to the iron core and bends, and the annular member extends radially outward along the side surface 9c of the end bracket 9. In other words, it is an annular member formed so as to move away from the rotor core 5 as it goes radially away from the connection portion of the iron core pin 26. Specifically, it is an annular member including a portion parallel to the side surface portion 9c of the end bracket 9 and an inclined portion curved from the parallel portion and extending to the connection portion of the iron core 26. A plurality of fan vanes 15b, which are wing members, are provided on the end bracket 9 side (anti-core side) of the fan main plate 15a. A side plate 15c, which is an annular member, is provided on the end bracket 9 side (non-iron side) of the fan vane 15b. The end bracket 9 may be substituted for the side plate 15c.

(Modification procedure 200)

Remove the current plate 28 and the stator core 3 (including the stator winding 4) from the stator frame 1 of the old motor (see Fig. 16).

(Modification procedure 210)

Install the stator core 3 (including the stator winding 4) removed in the remodeling procedure 200 into the stator frame 2 of the new motor (see Fig. 17).

The outer periphery of the stator frame 2 on the side of the end bracket 11 A plurality of discharge holes 19 (or discharge pipes) are provided for discharging cooling air that does not contain the cooled dust. Further, the discharge hole 19 may be provided on a side surface of the end bracket 11.

(Modification procedure 220)

Modification procedure From rotors modified in 140 to 190, namely rotor core 5, rotor winding 6, rotating shaft 7, push-in fan 15, auxiliary fan 15 and core retainer 26, 27 Install the assembled motor in stator frame 2 of the new motor (see Fig. 18).

(Modification procedure 230)

Attach the end bracket 9 modified in step 130 and the bearing device 12 to the stator frame 2 of the new motor (see Fig. 19).

(Modification procedure 240)

Attach the external parts such as the speed detector 24 and the grease supply device 23 removed in the remodeling procedure 100 to the new motor, complete the remodeling work, and remove the dust contained in the cooling air (outside air) without a filter. An open-type motor for driving a vehicle, that is, the motor shown in FIG. 1 is obtained. In the figure, 28 is the ground wire of the motor, 29 is the lead wire connected to the stator winding 4, 30 is the ground wire of the inverter, and 31 is the lead wire 29, It is a support base for supporting the signal line of the speed detecting device 24 and the ground line 30 of the inverter. Reference numeral 33 denotes a grease supply device for supplying grease of the bearing device 13, and reference numerals 32 and 34 denote mounting portions for mounting the electric motor on the bogie.

According to the motor obtained by the above modification procedure, when the push fan 15 is rotated by the rotation of the rotating shaft 7, the space between the inner diameter side of the fan van 15b and the air inlet 18 is formed. The suction force acts, and the outside air, which is the cooling air, is sucked from the air inlet 18. The sucked outside air is released by the pushing force of the pushing fan 15. It is pushed toward the inner surface of the outer peripheral surface portion 9 a of the end bracket 9. At this time, the cooling air is separated into two cooling air in the space between the outer diameter side of the fan vanes 15b and the end bracket 9 by the dust separating member 9d.

One of the separated cooling winds contains dust, flows into the inner surface of the outer peripheral surface 9 a of the end bracket 9, and is driven by the rotational force of the pushing fan 15 to the inner surface of the outer peripheral surface 9 a of the end bracket 9. Flows in the circumferential direction, reaches the discharge hole 21 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 member 9 d serving as a wall.

The other cooling air that has been separated does not contain dust, and is pushed toward the iron core via a gap between the inner diameter side of the dust separating member 9d and the outer diameter side of the fan main plate 15a. The cooling air pushed in cools one end of the stator core 3 and the rotor core 5, and the gap between the stator core 3 and the rotor core 5 and the axial direction provided in the rotor core 5. It flows to the exhaust side while cooling the continuous ventilation duct 25. The cooling air that has reached the exhaust side cools the other ends of the stator core 3 and the rotor core 5 and is discharged out of the machine through the exhaust holes 19. At this time, since the auxiliary fan 16 is rotating by the rotation of the rotating shaft 7, air flows in the space at the other end of the stator core 3 and the rotor core 5, and there is warm air there. Does not stay.

In this embodiment, when the old motor is converted to the new motor, the stator frame 1 of the old motor is replaced with the stator frame 2, but the stator frame 1 can be used as it is. . In this case, one of the exhaust holes 20 provided in the stator frame 1 is used as the exhaust hole 21, and the intake hole 17 is used as the exhaust hole 17. do it. If the end bracket 10 is removable, it may be replaced with the end bracket 11. Or you may use it as it is. Although not shown in the present embodiment, an air inlet is provided in the outer peripheral portion of the stator frame 2 on the exhaust hole 19 side, and a communication pipe for communicating the provided air inlet with the exhaust hole 21 is provided. The cooling air containing dust to be discharged outside the machine is taken into the space on the exhaust port 21 side, and then discharged to the outside together with the dust-free cooling air that has cooled the inside of the machine through the exhaust hole 21. You can also. In other words, the cooling air containing dust has a low cooling temperature, and thus has a high cooling effect. Therefore, by taking in the cooling air containing the low-temperature dust to the exhaust side, the cooling efficiency on the exhaust side can be increased. Since the cooling air containing dust has a smaller air volume than the cooling air containing no dust, the dust does not accumulate in the machine.

Further, in the present embodiment, at least 3 Omra or more is provided between the inner diameter side of the fan vane 15 b of the pushing fan 15 and the air inlet 18 provided in the inner peripheral surface 9 b of the end bracket 9. A space is formed. When a space equal to or greater than 30 bandages is formed in this way, the air density of the portion with the inlet 18 between the fan vane 15 b and the inlet 18 and the portion without the inlet 18 is Therefore, the noise generated in the space between the fan vanes 15b and the air inlets 18 can be reduced.

In the present embodiment, the number of fan vanes 15b and the number of air inlets 18 are a combination of numbers that are not divisible from each other (have no common divisor other than 1). In this way, the position (phase) of the fan vanes 15b and the inlet holes 18 at 360 ° of the inner peripheral surface 9b of the end bracket 9 are all different, so that the fan vanes 15b It does not increase the noise generated in the space between the air inlets 18. In addition, since the noise generation frequency can be reduced, resonance in the space between the fan vane 15b and the air inlet 18 becomes difficult, and the noise level hardly increases. Therefore, noise generated in the space between the fan vane 15b and the air inlet 18 can be reduced. According to the present embodiment described above, the suction fan 14 of the old motor is replaced with the push-in fan 15, that is, replaced with the fan main plate 15 a provided with the fan vane 15 b on the side opposite to the iron core, The air inlet 18 is provided at the portion facing the inner diameter side of the push fan 15, the exhaust hole 21 is provided at the portion facing the outer diameter side of the push fan 15, and the air is exhausted at the portion facing the outer diameter side of the push fan 15. Since the dust separation member 9 d is provided on the part of the iron core side of the hole 21 and the exhaust hole 19 is provided in the space on the side opposite to the space on the side of the pushing fan 15 of the iron core, the filter has been modified. It is possible to remove the dust contained in the cooling wind without using 22 and obtain an open-type motor for driving the vehicle that can be cooled with clean dust-free cooling air inside the machine. Therefore, it is possible to prevent dust from entering the machine and accumulate dust due to long-term operation, eliminating the need for periodic disassembly and cleaning, and extending maintenance return.

Further, the electric motor obtained by the modification of the present embodiment is provided with a cooling wind containing dust and a dust in a space surrounded by end bracket 9 including dust separating member 9 d and fan main plate 15 a of pushing fan 15. Since it can be separated from the cooling air that does not contain water, the mechanism for removing dust can be configured more easily than the conventional one, and the failure potential can be reduced. Therefore, reliability can be improved.

Also, the electric motor obtained by the modification of the present embodiment has the air inlet 18 and the fan vane 15b arranged substantially on the same straight line, so that the cooling taken in through the air inlet 18 The ventilation loss of the wind can be reduced, and the required cooling air volume can be easily secured even if the pushing fan 15 has a small diameter. Therefore, low noise can be achieved.

In addition, since the outer diameter of the electric motor obtained by the modification according to the present embodiment is the same as the outer dimension before the modification, the mounting dimensions of the bogie are the same as before the modification. It does not cause any trouble when it is mounted on a trolley. In addition, parts that affect the electrical characteristics of the motor, that is, the stator core, rotor core, stator winding, and rotor winding are reused before remodeling. Does not change.

In addition, according to the present embodiment, since the core fan 27 of the rotor core 5 is modified with the auxiliary fan 16, high-temperature cooling air is directly applied to the bearing cover 13 a of the bearing device 13. Without hitting, air flow occurs in the space between the iron core and the end bracket 11, and the heat of the high-temperature cooling air can be suppressed from being trapped in the space. Therefore, the temperature rise of the bearing device 13 can be suppressed. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be applied to a modification of an open-type electric motor for driving a vehicle such as an electric locomotive without substantially changing the external dimensions and the like. It is possible to provide an open-type motor for driving a vehicle in which a conventional open-type motor for driving a vehicle with a dust filter is essentially used as a dust-removing filter and the maintenance and inspection period is extended. According to the present invention, both or either of the housing and the closing member of the existing open motor for driving a vehicle may be used, or both may be replaced with a new housing and a new closing member.

Claims

The scope of the claims

1. A housing 1 that holds the stator, a suction fan 14 and a rotor that has a rotating shaft 7, and a pair of bearing devices 12, 13, and one bearing device 12 that supports the rotating shaft 7. In remodeling an open-type electric motor for driving a vehicle equipped with a dust filter 122 installed in the air intake hole 17 formed by the closing member 8 and the suction fan 14

(1) Remove the dust filter 1-2 and the blocking member 8 from the housing 1, and (2) replace the suction fan 14 with the push fan 15.

(3) A closing member 9 which surrounds the push fan 15 and has an air inlet 18 and forms a dust exhaust hole 21 together with the housing 2 is attached to the bearing device 12.

() Form an exhaust hole 19 at the position corresponding to the intake hole 17 of the housing 2

A method for remodeling an open-type motor for driving a vehicle, comprising the steps of:

2. A housing 1 that holds the stator, a suction fan 14 and a rotor that has a rotating shaft 7, and a pair of bearing devices 12, 13, and one bearing device 12 that support the rotating shaft 7. In remodeling an open-type electric motor for driving a vehicle equipped with a dust filter 22 installed in the air intake hole 1 形成 formed by the closing member 8 and the suction fan 14

(1) Remove the dust filter 22 from the housing 1,

(2) Replace suction fan 14 with push fan 15

(3) The opening / closing member 8 surrounds the push-in fan 15 and has an air inlet 18. The housing 2 is replaced with a closing member 9 which forms a dust exhaust hole 21.

(4) Attach the closing member 9 to the bearing device 12

(5) Form an exhaust hole 19 at a position corresponding to the air inlet 17 of the housing 2. A method for remodeling an open-type motor for driving a vehicle, comprising the steps of:

3. A process of attaching a means for preventing collision of airflow to the bearing device 13 in the vicinity of the bearing device 13 on the side corresponding to the exhaust hole 19 to the rotating shaft 7 directly or via another member. The method for remodeling an open-type motor for driving a vehicle according to claim 1 or 2, wherein the method includes:

4. The method for modifying an open-type motor for driving a vehicle according to claim 3, wherein the means for preventing collision of the airflow with the bearing device 13 is a fan 16.

5. The vehicle according to claim 1, wherein the push-in fan 15 includes a fan main plate 15a on a stator side and a fan van 15b on a side opposite to the stator. Modification method of open drive motor.

6. The housing 1 and the closing member 9 after the remodeling are characterized in that the air inlet 18 and the exhaust hole 19 are formed using the housing 1 and the closing member 8 before the remodeling. A method for modifying the open-type motor for driving a vehicle according to the above.

7. A stator having a stator and a rotor having a suction fan is housed in a first housing having an inlet / outlet port, one side of the first housing is closed by a closing member, and a dust filter is attached to the inlet port. In the modification of the open-type electric motor for driving a vehicle, the pushing fan provided with the fan vane on the side opposite to the iron core of the main plate of the fan and the suction fan were replaced with the second housing having an exhaust hole. A stator and a rotor having the push-in fan are housed therein; an air intake hole formed to face an inner diameter side of the push-in fan; a dust exhaust hole formed to face an outer diameter side of the push-in fan; A method for remodeling an open-type motor for driving a vehicle, wherein one side of the second housing is closed by a closing member having an annular protrusion.

8. Stator and suction fan in first housing with inlet and outlet When remodeling an open-type motor for driving a vehicle in which one side of the first housing is closed with a closing member and a dust filter is attached to the air inlet, a fan vane is used as a non-iron core of a fan raw plate. A second housing having an exhaust hole, a dust exhaust hole formed so as to face the outer diameter side of the push fan, and an annular protrusion, which are exchanged with the push fan provided so as to be on the side of the push fan. A rotor having the stator and the second fan is housed therein, and one side of the second housing is closed by a closing member having an air inlet formed to face an inner diameter side of the pushing fan. This is a method of remodeling an open-type motor for driving vehicles.

9. A vehicle driven with a rotor having a stator and a suction fan housed in a housing having an intake / exhaust hole, one side of the housing being closed by a first closing member, and a dust filter attached to the intake hole. In the remodeling of the open-type electric motor for use, the fan vane was replaced with the suction fan and the suction fan provided so as to be on the non-core side of the main plate of the fan. A dust exhaust hole using an exhaust hole is formed in the housing, and an annular protrusion is formed in the housing so as to face the outer diameter side of the pushing fan, and to face the inner diameter side of the pushing fan. A method for remodeling an open-type motor for driving a vehicle, characterized in that a second closing member having an air inlet formed in the above is replaced with the first closing member.

10. A vehicle driven with a rotor having a stator and a suction fan housed in a housing having an intake / exhaust port, one side of the housing being closed by a first closing member, and a dust filter attached to the intake port. In the remodeling of the open-type electric motor, a fan vane is provided on the side opposite to the iron core of the fan main plate, and the suction fan is replaced with the suction fan, and an exhaust hole using the air inlet hole is formed in the housing. And formed so as to face the inner diameter side of the pushing fan. A second blocking member having a dust discharge hole and an annular protrusion formed so as to be opposed to the outer diameter side of the pushing fan, and the first blocking member are replaced with each other. How to remodel an open motor for driving a vehicle.

11. The annular protrusion is provided with an annular dust separating member having an inner diameter larger than the outer diameter of the push-in fan or a cooling air flow straightening plate provided in the first housing. The method for remodeling an open-type motor for driving a vehicle according to any one of claims 7 to 10, wherein the method is provided.

12. The vehicle drive according to any one of claims 7 to 10, wherein a pipe is provided for communicating the air intake hole formed on the exhaust hole side of the second housing with the dust exhaust hole. How to remodel open motor.

13. The combination of the number of fan vanes of the push-in fan and the number of air holes formed in the closing member in a number that is not divisible into each other. How to modify the open motor for driving the vehicle described in the above.

14. The spatial distance between the inner diameter side of the fan vane of the push-in fan and the air inlet formed in the closing member is set to 30 or more. A method for remodeling an open-type electric motor for driving a vehicle according to any one of the above.

15. A means for preventing air from colliding with the bearing device in a vicinity of the bearing device on a side corresponding to an exhaust hole provided in the second housing. 10. The method for remodeling an open-type motor for driving a vehicle according to any one of 10.

16. For remodeling of an open-type motor for driving a vehicle in which a stator having a stator and a rotor having a push-in fan on one side of a rotating shaft are housed in a storage container having an inlet / outlet hole, and the other side of the rotating shaft is Vehicle equipped with an auxiliary fan Modification method of open drive motor.

17. The method for remodeling an open-type motor for driving a vehicle according to claim 16, wherein a rectifying plate is attached instead of the auxiliary fan.