JP2012196051A - Air duct for rotary electric machine and rotary electric machine unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air duct for a rotary electric machine that allows efficient cooling of the rotary electric machine.SOLUTION: An air duct for a rotary electric machine (air duct 2) includes: a motor mounting portion 41 that is mounted on a motor 1 which is provided with a plurality of cooling passages 17 and which has an approximately rectangular shape as viewed from an axial direction, and that includes a depressed portion 42 to be connected to the cooling passages 17 of the motor 1; connecting portions 51a and 51b that include respective flow passages 52a and 52b formed so as to extend along the axial direction; and a cooling fan mounting portion 61 which is connected to the respective flow passages 52a and 52b of the connecting portions 51a and 51b and on which a cooling fan 3 is mounted. As viewed from the axial direction of the motor 1, the respective flow passages 52a and 52b of the connecting portions 51a and 51b are provided to extend from vicinity of respective first ends of two opposite sides of the approximately rectangular-shaped motor 1 to vicinity of respective second ends of the same so as to correspond to the plurality of cooling passages 17.

Description

  The present invention relates to an air duct for a rotating electrical machine and a rotating electrical machine unit, and more particularly to an air duct for a rotating electrical machine and a rotating electrical machine unit including a flow path connected to a cooling passage of the rotating electrical machine.

  Conventionally, an air duct for a rotating electrical machine including a flow path connected to a cooling passage of the rotating electrical machine is known (see, for example, Patent Document 1).

  Patent Document 1 discloses a motor (rotary electric machine), a motor housing provided so as to surround the motor, a ventilation duct (rotary electric machine air duct) attached to the motor housing, and a forced cooling fan attached to the ventilation duct. An air-cooled motor (rotary electric machine unit) including the above is disclosed. A cooling hole is provided in the motor housing of the air-cooled motor so as to extend in the axial direction of the motor. This cooling hole is connected to the ventilation duct. The forced cooling fan sucks air from the end of the cooling hole, and the sucked air is discharged above the motor through the cooling hole and the ventilation duct of the motor housing, thereby cooling the motor. Is done. Note that a total of four cooling holes of the motor housing are provided at the four corners of the substantially rectangular motor housing when viewed from the axial direction of the motor. In addition, two ventilation ducts are provided, and each of the two ventilation ducts overlaps with two opposing cooling holes out of a total of four cooling holes provided at the four corners of the motor housing. It is provided to do. Further, the air discharged from the two cooling holes that do not overlap with the ventilation duct collides with a lid-like member provided so as to cover the cooling holes, and moves so as to rotate around the motor shaft. Then, it flows into the ventilation duct which overlaps with the cooling hole and is discharged.

Japanese Patent Laid-Open No. 2003-9466

  However, in the rotating electrical machine air duct described in Patent Document 1, all the air discharged from the two cooling holes that do not overlap the ventilation duct collides with the lid-like member provided to cover the cooling holes. Since it is configured to flow around the motor shaft so as to rotate and then flow into and out of the ventilation duct that overlaps the cooling hole, the two cooling holes that do not overlap with the ventilation duct The exhausted air may not be discharged efficiently. For this reason, there exists a subject of performing cooling of a motor more efficiently.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide an air duct for a rotating electrical machine and a rotating electrical machine unit capable of efficiently cooling the rotating electrical machine. Is to provide.

  To achieve the above object, an air duct for a rotating electrical machine according to a first aspect of the present invention is attached to a rotating electrical machine having a plurality of cooling passages along the axial direction and having a substantially rectangular shape when viewed from the axial direction. And a rotating electrical machine mounting portion including a first flow path connected to the cooling passage of the rotating electrical machine, and a second electrical connection section formed to extend along the axial direction while being connected to the first flow path of the rotating electrical machine mounting section. A connecting portion including a flow path; and a cooling fan mounting portion that is connected to the second flow path of the connecting portion and to which the cooling fan is mounted. The second flow path of the connecting portion is in the axial direction of the rotating electrical machine When viewed from the side, it is provided so as to extend from the vicinity of one end of the side of the substantially rectangular rotating electric machine to the vicinity of the other end so as to correspond to the plurality of cooling passages. The substantially rectangular shape is a broad concept including not only a general rectangular shape but also a polygonal shape in which corners of the rectangular shape are chamfered.

  A rotating electrical machine unit according to a second aspect of the present invention includes a rotating electrical machine having a plurality of first cooling passages along the axial direction and having a substantially rectangular shape when viewed from the axial direction, and the rotating electrical machine attached to the rotating electrical machine. The rotating electrical machine air duct is attached to the rotating electrical machine and has a first flow path that is connected to the first cooling passage of the rotating electrical machine, and the first flow path of the rotating electrical machine mounting section. And a connecting part having a second flow path formed so as to extend along the axial direction, and a cooling fan mounting part connected to the second flow path of the connecting part and to which a cooling fan is attached The second flow path of the connecting portion includes the vicinity of one end of the side of the substantially rectangular rotating electric machine so as to correspond to the plurality of cooling passages when viewed from the axial direction of the rotating electric machine. To extend to It has been kicked. The substantially rectangular shape is a broad concept including not only a general rectangular shape but also a polygonal shape in which corners of the rectangular shape are chamfered.

  In the present invention, as described above, in the vicinity of one end portion of the side of the substantially rectangular rotating electric machine so that the second flow path of the connecting portion corresponds to the plurality of cooling passages when viewed from the axial direction of the rotating electric machine. Is provided so as to extend to the vicinity of the other end, thereby allowing the second flow path of the connecting portion and the plurality of cooling passages provided at the corners of the rotating electrical machine to overlap each other when viewed from the axial direction of the rotating electrical machine. be able to. As a result, the air that has moved in the axial direction in the plurality of cooling passages of the rotating electrical machine can be directly introduced into the second flow path and discharged to the cooling fan side. Can be done automatically.

It is a figure which shows the whole structure of the motor unit by 1st Embodiment of this invention. It is sectional drawing of the motor part of the motor unit by 1st Embodiment of this invention. It is a top view of the motor main-body part of the motor part of the motor unit by 1st Embodiment of this invention. It is a top view of the external air introduction part of the motor part of the motor unit by a 1st embodiment of the present invention. It is a side view of the external air introduction part of the motor part of the motor unit by a 1st embodiment of the present invention. It is a disassembled perspective view of the motor main-body part of the motor unit by 1st Embodiment of this invention, an external air introduction part, and an air duct. It is the perspective view which looked at the air duct of the motor unit by a 1st embodiment of the present invention from the lower part. It is sectional drawing along the 200-200 line | wire of FIG. It is sectional drawing along the 300-300 line | wire of FIG. It is sectional drawing along the 400-400 line of FIG. FIG. 9 is a cross-sectional view taken along line 500-500 in FIG. It is sectional drawing along the 600-600 line of FIG. It is a figure which shows the whole structure of the motor unit by 2nd Embodiment of this invention. FIG. 14 is a cross-sectional view taken along line 700-700 in FIG. It is a figure which shows the whole structure of the motor unit by 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-7, the structure of the motor unit 100 by 1st Embodiment of this invention is demonstrated. The motor unit 100 is an example of the “rotary electric machine unit” in the present invention.

  As shown in FIG. 1, the motor unit 100 includes a motor unit 1 and an air duct 2 attached to the motor unit 1. A cooling fan 3 is attached to the motor unit 100 (air duct 2). The motor unit 1 is an example of the “rotating electric machine” in the present invention. The air duct 2 is an example of the “rotary electric machine air duct” of the present invention.

  The motor unit 1 includes a motor main body unit 4 and an outside air introduction unit 5. The motor main body 4 includes a stator 11, a rotor 12, bearings 13 a and 13 b, brackets 14 a and 14 b, and a frame 15.

  The stator 11 and the rotor 12 are disposed inside the frame 15. Further, the stator 11 and the rotor 12 are disposed so as to face each other in the radial direction of the rotor 12. Further, a winding 11a is wound around the stator 11. In addition, brackets 14a and 14b are attached to both ends of the frame 15 in the axial direction (Z direction) of the motor unit 1, respectively. Bearings 13a and 13b made of ball bearings or the like are attached to the brackets 14a and 14b, respectively. The rotor 12 is provided with a shaft 16 so as to penetrate the rotor 12. The shaft 16 is provided with a through hole 16 a extending in the Z direction for supplying a refrigerant to a device (not shown) provided separately from the motor unit 100. The shaft 16 is rotatably supported by bearings 13a and 13b provided on the brackets 14a and 14b, respectively.

  Further, as shown in FIG. 3, the motor main body 4 (brackets 14a, 14b and frame 15) has a substantially rectangular shape (as viewed in the axial direction (direction of arrow Z1) of the motor unit 1) as viewed in a plan view. (Rectangular shape). As shown in FIGS. 2 and 3, the motor main body 4 includes a plurality of (in the first embodiment) for cooling the motor main body 4 with air so as to penetrate the brackets 14 a and 14 b and the frame 15. Four) cooling passages 17 are provided. The four cooling passages 17 are provided at the four corners of the substantially rectangular brackets 14 a and 14 b and the frame 15. The four cooling passages 17 have a substantially triangular shape when viewed from the axial direction of the motor unit 1 (the direction of the arrow Z1). The cooling passage 17 is an example of the “first cooling passage” in the present invention.

  As shown in FIGS. 2 and 3, three cylindrical convex portions 141, 142, and 143 are formed at the end of the bracket 14a on the arrow Z1 direction side. The convex portion 141 is formed in a substantially circular shape when viewed from the direction of the arrow Z1, and has a diameter R1 that is substantially equal to a diameter R3 (see FIG. 4) of a through hole 34 of the outside air introduction portion 5 described later. Moreover, the convex part 142 is formed in the substantially perfect circle shape seeing from the arrow Z1 direction. Here, in the first embodiment, a plurality of fins 18 for radiating the heat of the motor main body 4 are provided on the outer surface 142 a of the convex portion 142. The fin 18 is an example of the “first fin” in the present invention. As shown in FIG. 3, the plurality of fins 18 are provided on the outer surface 142 a of the cylindrical convex portion 142 and at positions corresponding to the four cooling passages 17. The plurality of fins 18 are formed to extend radially from the outer surface 142a of the convex portion 142 in the radial direction. Further, the plurality of fins 18 are arranged at positions that do not overlap the four cooling passages 17 when viewed from the direction of the arrow Z1. The plurality of fins 18 are in a state in which the convex portion 143 of the motor main body 4 is inserted into a through hole 43 (see FIG. 8) of the motor mounting portion 41 described later and the shaft 16 of the motor main body 4 is exposed. The motor main body 4 is configured to be exposed to an annular space 44 surrounded by the outer surface 142a of the convex portion 142 and the inner surface of the concave portion 42 of the motor mounting portion 41. The convex portion 143 is formed in a substantially circular shape when viewed from the direction of the arrow Z1, and has a diameter R2 that is substantially equal to a diameter R4 (see FIG. 6) of a through hole 43 of the air duct 2 described later.

  As shown in FIG. 2, a refrigerant supply pipe 20 is connected to the shaft 16 (through hole 16 a) via a rotary joint 19. Thereby, even if the shaft 16 rotates, the refrigerant | coolant supply pipe | tube 20 is comprised so that it may not rotate. Further, a connection portion between the rotary joint 19 and the refrigerant supply pipe 20 is covered with a housing 21. In addition, two drain pipes 22 a and 22 b are connected to the housing 21.

  Moreover, in 1st Embodiment, as shown in FIG. 1, the external air introduction part 5 is provided between the air duct 2 and the motor main-body part 4 (bracket 14a). As shown in FIG. 4, the outside air introduction part 5 is formed in a substantially rectangular shape when viewed from the direction of the arrow Z1. In addition, four cooling passages 31 are provided at the four corners of the outside air introduction unit 5. The cooling passage 31 of the outside air introduction unit 5 has substantially the same shape as the cooling passage 17 of the motor body 4 as viewed from the direction of the arrow Z1. The cooling passage 31 of the outside air introduction portion 5 is provided so as to connect the cooling passage 17 of the motor main body portion 4 and a concave portion 42 of a motor mounting portion 41 described later. The cooling passage 31 is an example of the “second cooling passage” in the present invention.

  Further, in the first embodiment, a plurality of fins 32 are provided on the inner side surface of the outside air introduction portion 5 on the center side of the cooling passage 31 so as to extend toward the outside of the outside air introduction portion 5. The fin 32 is an example of the “second fin” in the present invention. The fin 32 has a function of cooling the motor unit 1. As shown in FIGS. 4 and 5, the outside air introduction part 5 is provided with a plurality of holes 33 connected to the cooling passage 31. One hole 33 is provided for one cooling passage 31 so as to extend along the X direction from the inner surface of the cooling passage 31 to the outer surface of the outside air introduction portion 5, and from the inner surface of the cooling passage 31. One is provided so as to extend along the Y direction to the outer surface of the outside air introduction section 5. In addition, a through hole 34 is provided in the center of the outside air introduction unit 5. The through hole 34 of the outside air introduction portion 5 is formed in a substantially circular shape when viewed from the direction of the arrow Z1, and has a diameter R3 that is substantially equal to the diameter R1 (see FIG. 3) of the convex portion 141 of the bracket 14a.

  As shown in FIGS. 6 to 9, the air duct 2 is connected to the motor attachment portion 41 attached to the motor portion 1, the connection portion 51 connected to the motor attachment portion 41, the connection portion 51, and the cooling fan 3. And a cooling fan mounting portion 61 to which is mounted. The motor mounting portion 41, the connecting portion 51, and the cooling fan mounting portion 61 are made of aluminum or the like and are integrally formed. The motor mounting portion 41 is an example of the “rotary electric machine mounting portion” in the present invention.

  As shown in FIGS. 7 and 8, in the first embodiment, the motor mounting portion 41 is formed with a recess 42 that opens in the direction of the arrow Z2. The recess 42 is an example of the “first flow path” and the “first recess” in the present invention. In addition, a through-hole 43 is provided at the bottom of the concave portion 42 for inserting the convex portion 143 (see FIGS. 2 and 3) of the motor main body 4 to expose the shaft 16 of the motor main body 4. . The through hole 43 of the motor mounting portion 41 is formed in a substantially circular shape when viewed from the direction of the arrow Z1, and has a diameter R4 (see FIG. 6) that is substantially equal to the diameter R2 of the convex portion 143 of the bracket 14a.

  Further, the upper surface of the convex portion 142 is the concave portion 42 of the motor mounting portion 41 in a state where the convex portion 143 of the motor main body portion 4 is inserted into the through hole 43 of the motor mounting portion 41 and the shaft 16 of the motor main body portion 4 is exposed. Abuts the bottom of the plate. As a result, an annular space 44 (see FIG. 5) is formed in a portion surrounded by the outer surface 142a of the convex portion 142 of the motor body 4 and the inner surface (the inner bottom surface 42a and the inner side surface 42b) of the concave portion 42 of the motor mounting portion 41. 12 oblique lines (portions surrounded by the motor mounting portion 41 and the convex portion 142) are formed. The annular space 44 is connected to the cooling passage 31 of the outside air introduction unit 5. In the annular space 44, a part of the air that has moved along the axial direction in the cooling passage 17 of the motor body 4 and in the cooling passage 31 of the outside air introduction portion 5 is in the annular space 44. It moves so that it may rotate centering around the shaft 16 (convex part 142) of this, and it is comprised so that it may flow in into the flow paths 52a and 52b of the connection part 51 mentioned later.

  As shown in FIGS. 6-9, in 1st Embodiment, the connection part 51 is formed in the hollow substantially rectangular parallelepiped shape, and the connection part 51 has the edge part of the arrow X1 direction side of the air duct 2, and an arrow. Two (connecting portions 51a and 51b) are provided at the end on the X2 direction side. The two connecting portions 51a and 51b are formed so as to extend along the Z direction. Further, the width W1 of the connecting portion 51 in the direction along the Y direction is smaller than the width W2 of the motor mounting portion 41 in the direction along the Y direction. Further, as shown in FIGS. 8, 9 and 11, each of the two connecting portions 51 a and 51 b is horizontally connected to the annular space 44 (recess 42) of the motor mounting portion 41. Channels 52a and 52b having a substantially rectangular cross section are provided. The connecting portions 51a and 51b are an example of the “second flow path” in the present invention.

  Here, in the first embodiment, as shown in FIG. 11, the respective flow paths 52a and 52b of the connecting portions 51a and 51b are opposed to each other by the substantially rectangular motor body portion 4 as viewed from the direction of the arrow Z1. It is provided so as to extend from the vicinity of the end on the arrow Y1 direction side to the vicinity of the end on the arrow Y2 direction side along one side. Further, the respective flow paths 52a and 52b of the connecting portions 51a and 51b partially exceed the cooling passage 17 (cooling passages 17a, 17b, 17c and 17d) provided in the motor main body 4 when viewed from the direction of the arrow Z1. It is provided to wrap. Specifically, the flow path 52a of the connecting portion 51a is partially overlapped with the cooling passage 17a and the cooling passage 17b while straddling the cooling passage 17a and the cooling passage 17b of the motor body 4. Is provided. The flow path 52b of the connecting portion 51b is provided so as to partially overlap the cooling passage 17c and the cooling passage 17d in a state of straddling the cooling passage 17c and the cooling passage 17d of the motor body 4. Yes. In addition, the area where the flow path 52a overlaps with the cooling passage 17a (cooling passage 17b) is smaller than the area where the flow path 52a does not overlap with the cooling passage 17a (cooling passage 17b). Similarly, the area where the flow path 52b overlaps the cooling passage 17c (cooling passage 17d) is smaller than the area where the flow path 52b does not overlap the cooling passage 17c (cooling passage 17d).

  Further, in the first embodiment, the flow paths 52a and 52b of the connecting portions 51a and 51b are partially overlapped with the annular space 44 (recess 42) of the motor mounting portion 41 when viewed from the direction of the arrow Z1. Is provided. As a result, part of the air that has moved along the axial direction in the cooling passage 17 of the motor main body 4 and in the cooling passage 31 of the outside air introduction portion 5 passes through the annular space 44 and flows into the flow paths 52a and 52b. Flows directly into. On the other hand, the remaining air moves so as to rotate around the shaft 16 (convex portion 142) of the motor main body 4 in the annular space 44, and then flows into the flow paths 52a and 52b.

  In the first embodiment, as shown in FIGS. 6, 8, 9, and 10, a recess 62 is provided on the cooling fan mounting portion 61 on the side where the cooling fan 3 is mounted (arrow Z <b> 1 direction side). Is provided. Further, the bottoms of the recesses 62 of the cooling fan mounting part 61 are connected to the flow paths 52a and 52b of the connecting parts 51a and 51b. Further, a concave portion 63 extending in the Y direction is provided so as to be continuous with the concave portion 62 at a portion where the flow path 52a and the concave portion 62 of the coupling portion 51a are coupled. Further, a stepped portion 64 is provided at a boundary portion with the concave portion 62 on the central side (arrow X2 direction side) of the cooling fan mounting portion 61 of the concave portion 63. The concave portion 62 is an example of the “second concave portion” in the present invention. The concave portion 63 is an example of the “third concave portion” in the present invention.

  In the first embodiment, as shown in FIG. 6, the width W <b> 3 in the direction along the X direction of the cooling fan mounting portion 61 is larger than the width W <b> 4 in the direction along the X direction of the motor mounting portion 41. It is comprised so that it may become. Further, the width W5 of the cooling fan mounting portion 61 in the direction along the Y direction is configured to be larger than the width W2 of the motor mounting portion 41 in the direction along the Y direction. Then, the side surface on the arrow X2 direction side of the cooling fan mounting portion 61 is disposed so as to protrude outward (from the arrow X2 direction side) from the side surface on the arrow X2 direction side of the motor mounting portion 41. The cooling fan mounting portion 61 is arranged so that the side surface of the cooling fan mounting portion 61 on the arrow X1 direction side is substantially flush with the side surface of the motor mounting portion 41 on the arrow X1 direction side. Accordingly, as shown in FIGS. 1, 8, and 9, the motor unit 1 and the cooling fan 3 are arranged such that the center line C1 of the motor unit 1 and the center line C2 of the cooling fan 3 are shifted from each other. The

  Next, the flow of air for cooling the motor unit 1 will be described with reference to FIGS. 9 and 12.

  First, when the cooling fan 3 rotates, air is sucked from the end of the cooling passage 17 of the motor body 4 on the arrow Z2 direction side. The sucked air moves in the direction of the arrow Z1 in the cooling passage 17 of the motor main body 4. At this time, the heat generated from the motor unit 1 is transmitted to the air moving in the cooling passage 17. Thereby, the motor unit 1 is cooled. The air that has moved in the cooling passage 17 moves in the cooling passage 31 of the outside air introduction unit 5. At this time, outside air is sucked from the hole 33 of the outside air introduction part 5. Thereby, the air moving in the cooling passage 31 and the outside air sucked from the hole 33 are mixed, and the temperature of the air moving in the cooling passage 31 is lowered. Further, the heat of the end portion (bracket 14a) on the arrow Z1 direction side of the motor body 4 is radiated to the air moving in the cooling passage 31 through the plurality of fins 32 provided on the inner side surface of the cooling passage 31. As a result, the end (bracket 14a) of the motor body 4 on the arrow Z1 direction side is cooled.

  Next, air flows from the cooling passage 31 to the annular space 44 surrounded by the outer surface 142a of the convex portion 142 of the motor main body 4 and the inner surface (the inner bottom surface 42a and the inner side surface 42b) of the concave portion 42 of the motor mounting portion 41. Flows in. The flow paths 52a and 52b of the connecting portions 51a and 51b are provided so as to partially overlap (see FIG. 11) the annular space 44 of the motor mounting portion 41 when viewed from the direction of the arrow Z1. Part of the air that has moved along the axial direction (the direction of the arrow Z1) in the cooling passage 17 of the motor main body 4 and the cooling passage 31 of the outside air introduction portion 5 is connected to the connecting portion 51a via the annular space 44. And 51b directly into the flow paths 52a and 52b. On the other hand, the remaining air collides with the inner surface (the inner bottom surface 42a and the inner side surface 42b) of the recess 42 of the motor mounting portion 41, and the moving direction changes from the Z direction to the X direction or the Y direction. Then, as shown in FIG. 12, after the remaining air moves so as to rotate around the shaft 16 (convex portion 142) of the motor unit 1 in the annular space 44, the flow path 52a of the connecting portions 51a and 51b. And 52b.

  Next, the air that has moved through the flow paths 52 a and 52 b of the connecting portions 51 a and 51 b moves into the recess 62 of the cooling fan mounting portion 61. Here, the step portion 64 is provided at the boundary portion between the concave portion 63 of the cooling fan mounting portion 61 and the concave portion 62 on the center side (arrow X2 direction side) of the cooling fan mounting portion 61, thereby connecting the connecting portion. The moving direction of the air that has moved through the flow path 52a of 51a in the direction of the arrow Z1 changes in a direction that intersects the direction of the arrow Z1 toward the center of the cooling fan mounting portion 61. Thereafter, the air that has moved into the recess 62 of the cooling fan mounting portion 61 is discharged by the cooling fan 3.

  In the first embodiment, as described above, the substantially rectangular motor portion 1 is formed so that the flow paths 52a and 52b of the connecting portions 51a and 51b correspond to the four cooling passages 17 when viewed from the arrow Z1 direction. Is provided so as to extend from the vicinity of one end of the side to the vicinity of the other end, so that it is provided in the flow paths 52a and 52b of the connecting portions 51a and 51b and the corners of the motor portion 1 when viewed from the direction of the arrow Z1. The four cooling passages 17 that are formed can be overlapped. Thus, the air that has moved in the axial direction in the four cooling passages 17 of the motor unit 1 can be directly introduced into the flow paths 52a and 52b and discharged to the cooling fan 3 side. The part 1 can be efficiently cooled.

  In the first embodiment, as described above, the cooling passage 17 of the motor unit 1 is provided in the vicinity of the four corners of the substantially rectangular motor unit 1, and the connecting unit 51 includes two connecting units. 51a and 51b, one end along two opposite sides of the substantially rectangular motor part 1 when the flow paths 52a and 52b of the two connecting parts 51a and 51b are viewed from the direction of the arrow Z1. It is provided so as to extend from the vicinity to the vicinity of the other end. Thereby, the flow paths 52a and 52b of the two connecting portions 51a and 51b can be easily overlapped with the cooling passages 17 provided in the vicinity of the four corners of the motor portion 1.

  Further, in the first embodiment, as described above, the flow path 52a (52b) of the connecting portion 51a (51b) is straddled across the two cooling passages 17 provided in the motor portion 1 when viewed from the arrow Z1 direction. It is provided so as to overlap a part of each of the two cooling passages 17 in a state. Thereby, the air which has moved the two cooling passages 17 provided in the motor part 1 can be easily flowed into the flow path 52a (52b) of the connection part 51a (51b).

  In the first embodiment, as described above, a part of the air that has moved along the axial direction in the cooling passage 17 of the motor unit 1 rotates around the axis of the motor unit 1 in the annular space 44. After moving so as to be configured, it is configured to flow into the flow paths 52a and 52b of the connecting portions 51a and 51b. Thereby, the heat of the portion corresponding to the annular space 44 of the motor portion 1 (one end portion of the motor main body portion 4, the bracket 14 a) is transmitted to the air that moves so as to rotate around the shaft of the motor portion 1. Therefore, the part corresponding to the annular space 44 of the motor unit 1 can be cooled.

  In the first embodiment, as described above, the flow paths 52a and 52b of the connecting portions 51a and 51b partially overlap the annular space 44 of the motor mounting portion 41 as viewed from the direction of the arrow Z1. A part of the air that has moved in the axial direction in the cooling passage 17 of the motor unit 1 is configured to directly flow into the flow paths 52a and 52b from the annular space 44. Thereby, the air which has moved in the cooling passage 17 of the motor unit 1 can be easily discharged to the cooling fan 3 side. Further, after the remaining air that has moved in the axial direction in the cooling passage 17 of the motor unit 1 moves so as to rotate around the axis of the motor unit 1 in the annular space 44, the flow paths 52 a and 52 b. It is constituted so that it may flow into. Thereby, the part corresponding to the annular space 44 of the motor part 1 can be cooled.

  In the first embodiment, as described above, the concave portion 63 is provided in the portion connected to the flow path 52a of the concave portion 62 of the cooling fan mounting portion 61 so as to be continuous with the concave portion 62. A stepped portion 64 is provided at the boundary with the concave portion 62 on the center side of the cooling fan mounting portion 61 of 63. Thereby, the moving direction of the air that has moved along the axial direction of the motor unit 1 in the flow path 52a of the connecting portion 51a changes so as to be directed toward the center side (cooling fan 3 side) of the cooling fan mounting portion 61. Therefore, the air that has moved through the flow path 52a of the connecting portion 51a can be easily discharged to the cooling fan 3 side.

  In the first embodiment, as described above, the cooling fan mounting portion 61 has the width W3 (W5) in the direction intersecting the axial direction of the motor portion 1 in the axial direction of the motor portion 1 of the motor mounting portion 41. The cooling fan mounting portion 61 is configured such that one side surface (arrow X2 direction side, arrow Y1 direction side) of the cooling fan mounting portion 61 is a motor. It arrange | positions so that it may protrude outside from the one side surface (arrow X2 direction side, arrow Y1 direction side) of the attaching part 41. As shown in FIG. Thereby, the other side surface (arrow X1 direction side, arrow Y2 direction side) of the cooling fan mounting portion 61 and the other side surface (arrow X1 direction side, arrow Y2 direction side) of the motor mounting portion 41 are made substantially flush. Therefore, even when the side on which the other side surface of the cooling fan mounting portion 61 (the other side surface of the motor mounting portion 41) is arranged is a wall, the other side surface of the cooling fan mounting portion 61 and the other side of the motor mounting portion 41 The side surface can be arranged along the wall surface.

  Moreover, in 1st Embodiment, as mentioned above, the state which one end part of the motor part 1 was inserted in the through-hole 43 of the motor attachment part 41 at one end part (bracket 14a) of the motor part 1, and was exposed. Thus, the fin 18 exposed in the annular space 44 is provided. Thereby, the part corresponding to the annular space 44 of the motor unit 1 can be cooled by the fins 18.

  Moreover, in 1st Embodiment, as mentioned above, it arrange | positions between the motor part 1 and the air duct 2, and the space 44 (concave part 42) of the cooling passage 17 of the motor part 1 and the motor attachment part 41 of the air duct 2 is made. The outside air introduction part 5 including the cooling passage 31 provided with the hole 33 for taking in outside air is provided. As a result, the air that has moved through the cooling passage 17 of the motor unit 1 and the outside air that has flowed into the cooling passage 31 of the outside air introduction unit 5 through the hole 33 of the outside air introduction unit 5 are mixed. The temperature of the air that has moved in one cooling passage 17 can be lowered.

  In the first embodiment, the fin 32 for cooling the motor unit 1 is provided in the cooling passage 31 of the outside air introduction unit 5 as described above. Thereby, the heat transmitted from the one end part (bracket 14a) of the motor part 1 to the outside air introduction part 5 can be radiated by the fins 32.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. 13 and 14. In the second embodiment, openings 73a and 73b are provided in the connecting portions 71a and 71b, respectively.

  As shown in FIGS. 13 and 14, the motor unit 101 according to the second embodiment of the present invention has an opening 73a on the side of the connecting portion 71a in the arrow X1 direction so as to be connected to the flow path 72a of the connecting portion 71a. Is provided. Moreover, the opening part 73b is provided in the arrow X2 direction side of the connection part 71b so that it may connect with the flow path 72b of the connection part 71b. In addition, the opening part 73a and the opening part 73b are provided in the arrow Z1 direction side (motor attachment part 41 side) of the connection part 71a and the connection part 71b. The motor unit 101 is an example of the “rotary electric machine unit” in the present invention. The flow paths 72a and 72b are examples of the “second flow path” in the present invention. In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  In 2nd Embodiment, as above-mentioned, the connection part 71a (71b) is provided so that it may connect with the flow path 72a (72b), and contains the opening part 73a (73b) for taking in external air. As a result, the air that has moved through the cooling passage 17 of the motor unit 1 and the outside air that has flowed into the flow path 72a (72b) via the opening 73a (73b) of the connecting portion 71a (71b) are mixed. Therefore, the temperature of the air that has moved in the cooling passage 17 of the motor unit 1 can be reduced. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG. In the third embodiment, unlike the first and second embodiments, the outside air introduction unit 5 is not provided.

  In the motor unit 102 according to the third embodiment of the present invention, as shown in FIG. 15, the outside air introduction portion 5 (see FIG. 1) is not provided between the motor body portion 4 a and the air duct 2. The air duct 2 is directly attached to 4a. The motor unit 102 is an example of the “rotary electric machine unit” in the present invention. Further, two cylindrical convex portions 82 and 83 are formed at the end of the bracket 81 of the motor body 4a on the arrow Z1 direction side. A plurality of fins 84 for dissipating heat from the motor main body 4a are provided on the side surface of the convex portion 82. The fin 84 is an example of the “first fin” in the present invention. Further, the side surface of the convex portion 83 is formed so as to contact the inner peripheral surface of the through hole 43 of the air duct 2. The remaining configuration of the third embodiment is similar to that of the aforementioned first embodiment.

  The effects of the third embodiment are the same as those of the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to third embodiments, the example in which the rotating electrical machine of the present invention is applied to a motor has been described, but the present invention is not limited to this. You may apply the rotary electric machine of this invention to generators other than a motor, for example.

  Moreover, in the said 1st-3rd embodiment, seeing from the arrow Z1 direction, the area where the flow path of a connection part overlaps with the cooling passage of a motor part is the cooling flow path of a motor part. However, the present invention is not limited to this example. In the present invention, the area where the flow path of the connecting part overlaps the cooling passage of the motor part may be greater than the area where the flow path of the connecting part does not overlap the cooling passage of the motor part.

  Moreover, although the said 1st-3rd embodiment demonstrated the example in which the flow path of the connection part was formed in the substantially rectangular shape seeing from the arrow Z1 direction, this invention is not limited to this. In the present invention, as long as the flow path of the connecting portion is provided so as to extend from the vicinity of one end of the side of the motor to the vicinity of the other end, a shape other than a substantially rectangular shape may be used.

  Moreover, although the said 1st-3rd embodiment demonstrated the example in which a level | step-difference part was provided in one of the two parts to which the recessed part of the cooling fan attachment part and the flow path of a connection part were connected, this The invention is not limited to this. For example, you may provide a level | step-difference part in both of the two parts to which the recessed part of the cooling fan attachment part and the flow path of a connection part are connected.

  Moreover, in the said 1st-3rd embodiment, the width | variety of the direction (X direction, Y direction) which cross | intersects the axial direction (Z direction) of the motor part of a cooling fan attachment part is the axis | shaft of the motor part of a motor attachment part. Although the example configured to be larger than the width in the direction intersecting the direction has been described, the present invention is not limited to this. For example, the width in the direction (X direction, Y direction) intersecting the axial direction (Z direction) of the motor portion of the cooling fan mounting portion is equal to the width in the direction intersecting the axial direction of the motor portion of the motor mounting portion. May be.

  In the first to third embodiments, the example in which the motor unit is formed in a substantially rectangular shape (square shape) when viewed from the direction of the arrow Z1 has been described, but the present invention is not limited thereto. For example, you may chamfer the four corners of a square-shaped motor part.

  In the first to third embodiments, the example in which the cooling passage provided in the motor unit is formed in a substantially triangular shape when viewed from the arrow Z1 direction has been described, but the present invention is not limited thereto. In the present invention, the cooling passage provided in the motor unit may be formed in a shape other than a substantially triangular shape when viewed from the arrow Z1 direction.

1 Motor part (rotary electric machine)
2 Air duct (Air duct for rotating electrical machines)
3 Cooling fan 5 Outside air introduction part 17 Cooling passage (first cooling passage)
18, 84 Fin (first fin)
31 Cooling passage (second cooling passage)
32 fins (second fins)
33 Hole 41 Motor mounting part (Rotating electrical machine mounting part)
42 recess (first flow path, first recess)
43 Through-hole 44 Space 51, 51a, 51b, 71a, 71b Connecting part 52a, 52b, 72a, 72b Channel (second channel)
61 Cooling fan mounting part 62 Recessed part (second recessed part)
63 recess (third recess)
64 Stepped portion 73a, 73b Opening portion 100, 101, 102 Motor unit (rotary electric machine unit)

Claims (13)

A rotating electrical machine mounting portion including a first flow path provided with a plurality of cooling passages along the axial direction and attached to the rotating electrical machine having a substantially rectangular shape when viewed from the axial direction and connected to the cooling passage of the rotating electrical machine When,
A connecting portion including a second flow path that is connected to the first flow path of the rotating electrical machine mounting portion and that extends along the axial direction;
A cooling fan mounting portion connected to the second flow path of the connecting portion and to which a cooling fan is mounted;
The second flow path of the connecting portion is viewed from the axial direction of the rotating electrical machine so as to correspond to the plurality of cooling passages, from the vicinity of one end of the side of the substantially rectangular rotating electrical machine to the other end. An air duct for a rotating electrical machine provided to extend to the vicinity. The cooling passages of the rotating electrical machine are respectively provided near four corners of the substantially rectangular rotating electrical machine,
The connecting portion includes a plurality of connecting portions,
Each of the second flow paths of the plurality of connecting portions, when viewed from the axial direction of the rotating electrical machine, extends from the vicinity of one end to the vicinity of the other end along two opposing sides of the substantially rectangular rotating electrical machine. The air duct for rotating electrical machines according to claim 1, wherein the air duct is provided so as to extend.   The said 2nd flow path of the said connection part is provided so that it may overlap with at least one part of the said cooling passage provided in the said rotary electric machine seeing from the axial direction of the said rotary electric machine. An air duct for a rotating electrical machine as described in 1.   The second flow path of the connecting portion overlies at least a part of each of the plurality of cooling passages in a state of straddling the plurality of cooling passages provided in the rotating electric machine when viewed from the axial direction of the rotating electric machine. The air duct for rotating electrical machines according to claim 3, wherein the air duct is provided so as to wrap. The rotating electrical machine mounting portion includes a first recess provided on the rotating electrical machine side, and a through-hole provided at the bottom of the first recess, for inserting and exposing one end of the rotating electrical machine. ,
The first flow path of the rotating electrical machine attachment portion has an outer surface of the one end portion of the rotating electrical machine in a state where one end portion of the rotating electrical machine is exposed by being inserted into the through hole of the rotating electrical machine attachment portion. And an annular space surrounded by the inner surface of the first recess of the rotating electrical machine mounting portion, and at least a part of the air that has moved along the axial direction in the cooling passage of the rotating electrical machine is 5. The structure according to claim 1, wherein the annular first flow path is configured to flow around the axis of the rotating electrical machine and then flow into the second flow path of the connecting portion. 2. An air duct for a rotating electrical machine according to item 1.   The second flow path of the connecting portion is provided so as to partially overlap the annular first flow path of the rotating electrical machine mounting portion when viewed from the axial direction of the rotating electrical machine. A part of the air that has moved in the axial direction in the cooling passage of the electric machine flows directly into the second flow path from the annular first flow path, and the remaining air flows in the annular first flow path. The air duct for a rotating electrical machine according to claim 5, wherein the air duct is configured to flow into the second flow path after moving so as to rotate about the axis of the rotating electrical machine in one flow path. The cooling fan mounting portion includes a second recess provided on a side where the cooling fan is mounted,
A portion of the second recess connected to the second flow path is provided with a third recess so as to be continuous with the second recess, and a central side of the cooling fan mounting portion of the third recess. The air duct for a rotating electrical machine according to any one of claims 1 to 6, wherein a step portion is provided at a boundary portion between the second concave portion and the second concave portion. The cooling fan mounting portion is configured such that the width in the direction intersecting the axial direction of the rotating electrical machine is larger than the width of the rotating electrical machine mounting portion in the direction intersecting the axial direction of the rotating electrical machine. ,
The said cooling fan attachment part is arrange | positioned so that the one side surface of the said cooling fan attachment part may protrude outside from the one side surface of the said rotary electric machine attachment part. Air duct for rotating electrical machines.   9. The air duct for a rotating electrical machine according to claim 1, wherein the connecting portion further includes an opening portion provided so as to be connected to the second flow path and taking in outside air. A rotating electrical machine having a plurality of first cooling passages along the axial direction and having a substantially rectangular shape when viewed from the axial direction;
A rotating electrical machine air duct attached to the rotating electrical machine,
The rotating electrical machine air duct is
A rotating electrical machine mounting portion attached to the rotating electrical machine and having a first flow path connected to the first cooling passage of the rotating electrical machine;
A connecting portion having a second flow path that is connected to the first flow path of the rotating electrical machine mounting portion and extends along the axial direction;
A cooling fan mounting portion connected to the second flow path of the connecting portion and to which a cooling fan is mounted;
The second flow path of the connecting portion is viewed from the axial direction of the rotating electrical machine so as to correspond to the plurality of cooling passages, from the vicinity of one end of the side of the substantially rectangular rotating electrical machine to the other end. A rotating electrical machine unit provided to extend to the vicinity. The rotating electrical machine mounting portion includes a first recess provided on the rotating electrical machine side, and a through-hole provided at the bottom of the first recess, for inserting and exposing one end of the rotating electrical machine. ,
The first flow path of the rotating electrical machine attachment portion has an outer surface of the one end portion of the rotating electrical machine in a state where one end portion of the rotating electrical machine is exposed by being inserted into the through hole of the rotating electrical machine attachment portion. And an annular space surrounded by the inner surface of the first recess of the rotating electrical machine mounting portion,
The one end of the rotating electrical machine has a first fin exposed in the annular first flow path in a state where the one end of the rotating electrical machine is inserted and exposed in the through hole of the rotating electrical machine mounting portion. The rotating electrical machine unit according to claim 10, wherein   The rotary electric machine is disposed between the rotary electric machine air duct and connects the first cooling passage of the rotary electric machine and the first flow path of the rotary electric machine mounting portion of the rotary electric machine air duct and takes in outside air. The rotating electrical machine unit according to claim 10 or 11, further comprising an outside air introduction portion including a second cooling passage provided with a hole for the purpose.   The rotating electrical machine unit according to claim 12, wherein a second fin for cooling the rotating electrical machine is provided in the second cooling passage of the outside air introduction section.

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