JP2010158124A - Rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the rotating electrical machine in which a water channel for cooling the stator core can be formed by easy processing at a low cost while maintaining high cooling efficiency. <P>SOLUTION: In the casing 2 of the rotating electrical machine 1, a plurality of passages 91 are formed by drilling in the direction of the axis of rotation of a rotor 11. In the opposite end faces 21 and 22 of the casing 2, a first groove 921 is formed to connect the openings of two adjoining passages 91. In the cover surfaces 33 and 43 of the cover bodies 3 and 4, second grooves 34 and 44 are formed in the circumferential direction of the cover bodies 3 and 4, and a water partition wall 923 is provided to cover the second grooves 34 and 44. The first groove 921 and the cover surfaces 33 and 43 or the water partition wall 923 form a coupling path 92 which couples the passages 91. The coupling path 92 is connected with a water supply channel 15 and a drainage channel 16 which are formed, respectively, in the cover bodies 3 and 4. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rotating electrical machine used for a dynamo device or the like.

  Conventionally, dynamo devices are used to test the performance of automobile transmissions and the like. This dynamo device uses a rotating electrical machine as a pseudo load device, and a test vehicle is connected to the rotating electrical machine.

  This rotating electrical machine has a generally cylindrical casing and a stator core and a rotor accommodated in the casing. In many cases, the stator core is cooled by a liquid in order to suppress heat from the stator core and a coil wound around the stator core that are generated when the rotor is driven to rotate.

  When oil is used as the cooling liquid, for example, a spiral groove is formed in the stator core, and the oil is directly supplied between the casing and the stator core. However, if oil is used as the coolant, the maximum stored oil amount of the rotating electrical machine is subject to regulations by the Fire Service Act, and water that is not subject to such regulations may be used as the coolant.

  When water is used as the cooling liquid, it cannot flow directly to the outer periphery of the stator core because it is not an insulator. Therefore, in the rotating electrical machine described in Patent Document 1 below, the casing has a double structure of an outer casing and an inner casing, and a spiral groove serving as a cooling medium passage is formed between both casings (the surface of the inner casing). is doing.

Japanese Patent Application Laid-Open No. 2007-20351 (FIGS. 2, 3, 6, etc.)

  However, in the technique of the above-mentioned Patent Document 1, since the casing has a double structure, the thickness of each casing has to be thin compared to a case where the casing is constituted by a single member. In addition, if the casing is too thick, the cooling efficiency is lowered. Therefore, the larger the rotating electrical machine (casing), the more difficult the processing for forming the groove from the viewpoint of the thickness and strength of the casing, and the higher the cost.

  In view of the circumstances as described above, an object of the present invention is to provide a rotating electrical machine capable of forming a water channel for cooling a stator core at low cost by easy processing while maintaining high cooling efficiency. is there.

In order to solve the above-described problem, an electronic apparatus according to an embodiment of the present invention includes a rotating shaft, a stator core, a casing, a plurality of passages, and a water channel forming member.
The stator core is provided around the rotor supported by the rotating shaft, and a coil is wound thereon.
The casing is provided in the vicinity of the periphery of the stator core, has a first end surface and a second end surface in the rotation axis direction, and has a cylindrical shape.
The passage is linearly formed inside the casing so as to communicate the first end surface and the second end surface in the direction of the rotation axis. The passage is formed by, for example, drilling or laser processing.
The water channel forming member is joined to the first end surface and the second end surface, and has at least a part of a connecting channel for forming a water channel. The water channel is formed by connecting the plurality of passages.
In the rotating electrical machine, the plurality of passages are linearly formed in the direction of the rotation axis by, for example, drilling or laser processing so as to communicate the first end surface and the second end surface of the casing. If a water channel formation member is joined to these 1st and 2nd end surfaces, a water channel will be formed by connecting a plurality of above-mentioned passages via a connection channel. This water channel can be made to function as a cooling water channel for suppressing heat from the stator core and the coil wound around the stator core generated when the rotor is driven to rotate. With the above configuration, the water channel for cooling the stator core can be formed easily and at low cost by simple processing and assembly, so that it is possible to easily cope with an increase in the size of the rotating electrical machine. In addition, since the passage is linearly formed inside the casing, the thickness of the casing is larger than that in the case where a water channel is formed by forming a spiral groove between the casings of the double structure as in the past. It is possible to form a plurality of passages while maintaining the strength. Thereby, the cooling water can be circulated through the water channel at a position closer to the stator core.

The casing may have a first groove formed on the first end surface and the second end surface integrally with each opening of the passage.
In this case, the water channel forming member is joined to the casing so as to cover the first end surface and the second end surface, respectively, and has two cover surfaces having a cover surface that forms the connection channel together with the first groove. It may be a body.
As described above, by making the cover surface of the cover body a part of the water channel, the first groove is formed in the casing, and only the first and second end surfaces and the cover surface are joined. It becomes possible to form the connected water channel more easily.

The cover body may have a water supply channel and a drain channel.
The water supply channel has a water supply port communicated with the first groove.
The drainage channel has a drainage port communicated with the first groove.
Thereby, by forming the water supply channel and the drainage channel in the cover body that is easier to handle than the casing instead of the casing, the water supply channel and the drainage channel can be easily formed without depending on the structure of the casing. it can. That is, since the passage and the first groove are formed in the casing, it is difficult to process the water supply channel and the drainage channel, but the cover body is easily used for the water supply channel and the drainage channel. It becomes.

A plurality of the first grooves may be formed integrally with the openings of the two adjacent passages.
In this case, a plurality of the water supply passages and the drainage passages may be formed so as to communicate with the different first grooves.
As a result, a plurality of the first grooves are formed, and a plurality of water supply passages and drainage passages are formed so as to be communicated with different first grooves, thereby adjusting the balance of the pipe line resistance, and inside the casing. Cooling water can be distributed at a stable flow rate. That is, by connecting the water supply channel and the drainage channel to the different first grooves, the flow direction and flow rate of the cooling water are adjusted, and the cooling water is evenly distributed inside the casing, thereby cooling the stator core more reliably. be able to.

The water supply channel may include a first water supply channel, a second water supply channel, and a third water supply channel.
The first water supply channel is formed in the radial direction of the cover body from the water supply port.
The second water supply channel is connected to the first water supply channel and is formed in the circumferential direction of the cover body.
The third water supply channel is formed in the radial direction so as to connect the second water supply channel and the first groove.
The drainage channel may include a first drainage channel, a second drainage channel, and a third drainage channel.
The first drainage channel is formed in the radial direction of the cover body from the drainage port.
The second drainage channel is connected to the first drainage channel and is formed in the circumferential direction of the cover body.
The third drainage channel is formed in the radial direction so as to connect the second drainage channel and the first groove.
Thus, by forming the second water supply channel and the second drainage channel in the circumferential direction of the cover body, the position of the water supply port and the drainage port and the position of the first groove to which they are connected are determined. There is no need to match. Therefore, when the position of the first groove connected to the water supply channel and the drainage channel is determined in consideration of cooling efficiency and the like, the position of the water supply port and the drainage port is set to the second water supply channel regardless of the position. And can be adjusted by the second drainage channel. Therefore, it is possible to easily avoid a decrease in appearance due to the exposure of the water supply port and the drain port. For example, it is possible to make adjustments such as providing the water supply port and the drain port on the bottom side or the back side where it is difficult for human eyes to touch. Moreover, it can also prevent easily that a water supply port and a drain outlet interfere with the other member of a rotary electric machine by adjusting the position of a water supply port and a drain port.

The water supply channel and the drainage channel may be formed on the first end face side.
Thereby, the appearance of the side where the water supply channel and the drainage channel are not formed can be improved by concentrating the water supply channel and the drainage channel on one side. For example, when the second end face side is a side that is in close contact with human eyes, the water inlet and the drain outlet are exposed from the second end face side by providing the water supply passage and the drain passage on the first end face side. It is possible to improve the appearance of the second end face side.

  As described above, according to the present invention, a water channel for cooling the stator core can be formed at low cost by easy processing while maintaining high cooling efficiency.

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

[First Embodiment]
First, a first embodiment of the present invention will be described.

  FIG. 1 is a front view of the rotating electrical machine according to the present embodiment. FIG. 2 is a rear view of the rotating electric machine. FIG. 3 is a side view of the rotating electrical machine. FIG. 4 is a cross-sectional view of the rotating electrical machine in the side surface direction. This rotating electrical machine is used for a dynamo device, for example.

  As shown in FIGS. 1 to 4, the rotating electrical machine 1 includes a cylindrical casing 2 and cylindrical cover bodies 3 and 4 connected to the casing 2. As shown in FIGS. 3 and 4, the casing 2 has an end surface 21 on the front side and an end surface 22 on the back side. The cover bodies 3 and 4 are formed to have the same diameter as the casing 2 and have disk parts 31 and 41 and ring parts 32 and 42, respectively. The disk part 31 and the ring part 32, and the disk part 41 and the ring part 42 are connected by, for example, screwing. The ring portions 32 and 42 have cover surfaces 33 and 43 respectively connected to the casing 2. The cover surface 33 is connected to the end surface 21 on the front side of the casing 2, and the cover surface 43 is connected to the end surface 22 on the back side of the casing 2, for example, by welding. Thus, the cover bodies 3 and 4 are integrated with the casing 2 by covering the openings at both ends of the casing 2. The casing 2 and the cover bodies 3 and 4 are supported by bases 6 provided on the bottom surfaces of the cover bodies 3 and 4, respectively.

  As shown in FIG. 4, the rotor 2 and the stator core 13 are accommodated in the casing 2. The rotor 11 includes a rotor core 111 formed by stacking steel plates and a permanent magnet (not shown) embedded in the rotor core 111 and is rotatably supported by the shaft 5. The shaft 5 is supported by bearings 12 at both ends thereof. The stator core 13 is formed by laminating steel plates, and a coil is wound around the stator core 13 to form a stator.

  As shown in FIG. 1, a terminal box 7 that houses an output terminal connected to the coil 14 via a cable (not shown) or the like is provided on the side surface of the cover body 4. The rotor 11 rotates following the rotating magnetic field generated when a drive current is passed through the coil 14 via an output terminal from an excitation circuit (not shown). As shown in FIGS. 3 and 4, one end (front side) of the shaft 5 protrudes from an opening formed in the cover body 3, and the other end (back side) of the shaft 5 is also formed in the cover body 4. It protrudes slightly from the opened opening and is covered with a lid 8 on the back surface of the casing 2. The rotation of the rotor 11 is taken out through a protruding portion at one end of the shaft 5.

  FIG. 5 is a view showing an end face 21 on the front side of the casing 2, and FIG. 6 is a view showing an end face 22 on the back side of the casing 2. FIG. 7 is a view showing the cover surface 33 of the cover body 3, and FIG. 8 is a view showing the cover surface 43 of the cover body 4.

  As shown in FIG. 4, the rotating electrical machine 1 has a water channel 90 through which cooling water for cooling the stator core passes. The water channel 90 includes a plurality of passages 91 and a plurality of connection passages 92 that connect the plurality of passages 91.

  As shown in FIGS. 4 to 6, a plurality of passages 91 are formed in the casing 2 in the direction of the rotation axis (shaft 5) (Z direction) of the rotor 11 by, for example, drilling. As shown in FIGS. 5 and 6, a plurality of the passages 91 are provided at equal intervals along the circumferential direction of the casing 2. In the present embodiment, the number of passages 91 is 36, but is not limited to this number.

  As shown in FIGS. 4 to 8, the connecting path 92 includes the first groove 921 formed in the end surfaces 21 and 22 of the casing 2 and the cover surfaces 33 and 43 of the cover bodies 3 and 4. Is done. As shown in FIGS. 5 and 6, each first groove 921 is formed integrally with each opening so as to connect each opening of two adjacent passages 91. The first groove 921 of the end surface 21 is formed so as to connect the two passages 91 that are not connected by the first groove 921 formed on the end surface 22. More specifically, one of the two passages 91 connected by the first groove 921 on the end surface 21 is connected to the other passage 91 adjacent thereto on the end surface 22.

  As shown in FIGS. 4, 7, and 8, second grooves 34 and 44 are formed on the cover surfaces 33 and 43 of the cover bodies 3 and 4 in the circumferential direction of the cover bodies 3 and 4, respectively. Has been. The second grooves 34 and 44 are covered with a water partition wall 923. As shown in FIG. 4, the water partition wall 923 is made of an arc-shaped plate material. The radial width of the water partition wall 923 is formed to be slightly larger than the radial width of the second grooves 34 and 44 and is supported by, for example, a stepped portion formed at the start ends of the second grooves 34 and 44. ing. This water partition wall 923 also forms part of the connecting path 92 together with the cover surfaces 33 and 43. That is, for the portion of the water partition wall 923 cover surfaces 33 and 43 where the water partition wall 923 is provided, the first groove 921 and the water partition wall 923 constitute the connecting path 92, For the other portions, the first groove 921 and the cover surfaces 33 and 43 constitute a connection path 92.

  As described above, the passage 91 formed inside the casing 2 includes the first groove 921 of the end surfaces 21 and 22 of the casing 2 and the cover surfaces 33 and 43 of the cover bodies 3 and 4 or the water partition wall 923. By being connected by the connecting path 92, the water path 90 is formed. Therefore, in this embodiment, the cover bodies 3 and 4 function as a water channel forming member for connecting the channel 91 to form a water channel.

  The cover body 4 is provided with a water supply passage 15 for supplying cooling water flowing through the water passage 90, and the cover body 3 is provided with a drainage passage 16 for discharging the cooling water. In the present embodiment, two water supply channels 15 and two water discharge channels 16 are provided. As shown in FIGS. 3 and 4, the water supply channel 15 has two water supply ports 9a and 9b, and the drainage channel 16 has two water discharge ports 10a and 10b. In the present embodiment, the water supply channel 15 (water supply ports 9 a and 9 b) is provided in the cover body 3, and the drainage channel 16 (drainage ports 10 a and 10 b) is provided in the cover body 4. That is, the cooling water is supplied from the cover body 3 side (rear side) and is discharged from the cover body 4 side (front side) through the inside of the casing 2.

  The water supply channel 15 communicates the water supply ports 9a and 9b with two different connection channels 92, and the drainage channel 16 communicates the drainage ports 10a and 10b with two different connection channels 92, respectively. By providing two water supply passages 15 and two drainage passages 16, it becomes easier to adjust the balance of the pipe resistance when the coolant flows through the water passages 90 than in the case where they are provided one by one. In addition, the cooling water can be distributed at a stable flow rate. Of course, one or three or more water supply channels 15 and drainage channels 16 may be provided depending on the balance of the pipe resistance. Further, by providing the water supply channel 15 and the drainage channel 16 in the cover bodies 3 and 4, compared with the case where they are provided in the casing 2, the processing for balance adjustment and the like can be performed without depending on the structure of the casing 2. It can be done easily.

  In FIG. 4, for convenience of explanation, the water supply port 9 a and the drain port 10 a are shown on the upper surface of the rotating electrical machine 1, but actually, the water supply port 9 a and the drain port 10 a are as shown in FIG. 3. And provided on the side surface of the rotating electrical machine 1.

  FIG. 9 is a schematic view showing the relationship between the water supply channel 15 and the drainage channel 16 by developing the water channel 90 in the circumferential direction of the casing 2.

  As shown in FIGS. 4 and 7 to 9, the water supply channel 15 includes a first water supply channel 151, a second water supply channel 152, and a third water supply channel 153, and the drainage channel 16 includes the first water supply channel 151. A drainage channel 161, a second drainage channel 162, and a third drainage channel 163 are configured.

  The first water supply path 151 is formed in the radial direction of the cover bodies 3 and 4 from the water supply ports 9a and 9b. Specifically, as shown in FIGS. 4, 8, and 9, the first water supply channel 151 is formed so as to be connected to the second groove 44 of the cover body 4 from the water supply ports 9 a and 9 b, respectively. The

  The second water supply path 152 is connected to the first water supply path 151 and is formed in the circumferential direction of the cover bodies 3 and 4. Specifically, as shown in FIGS. 4, 8, and 9, the second water supply path 152 is configured by the second groove 44 and the water partition wall 923.

  The third water supply path 153 is formed in the radial direction so as to connect the second water supply path and the first groove 921 of the casing 2. Specifically, as shown in FIGS. 4, 8, and 9, the third water supply channel 153 includes a through hole 9231 formed in the water partition wall 923.

  The first drainage channel 161 is formed in the radial direction of the cover bodies 3 and 4 from the drainage ports 10a and 10b. Specifically, as shown in FIGS. 4, 7, and 9, the first drainage channel 161 is formed so as to be connected to the second groove 34 of the cover body 3 from the drainage ports 10 a and 10 b, respectively. The

  The second drainage channel 162 is connected to the first drainage channel 161 and is formed in the circumferential direction of the cover bodies 3 and 4. Specifically, as shown in FIGS. 4, 7, and 9, the second drainage channel 162 includes the second groove 34 and the water partition wall 923.

  The third drainage channel 163 is formed in the radial direction so as to connect the second drainage channel and the first groove 921 of the casing 2. Specifically, as shown in FIGS. 4, 7, and 9, the third drainage channel 163 includes a through hole 9232 formed in the water partition wall 923.

  Thus, by forming the second water supply channel 152 and the second drainage channel 162 in the circumferential direction of the cover bodies 3 and 4, the positions of the water supply ports 9a and 9b and the drainage ports 10a and 10b, It is not necessary to match the position of the first groove 921 to which they are connected. Therefore, when the position of the first groove 921 connected to the water supply channel 15 and the drainage channel 16 is determined in consideration of the cooling efficiency and the like, the water supply ports 9a and 9b, the drainage port 10a and The position of 10b can be adjusted. Therefore, it is possible to easily avoid a decrease in appearance due to the water supply ports 9a and 9b and the drain ports 10a and 10b being exposed from the surfaces of the cover bodies 3 and 4. For example, it is possible to make adjustments such as providing the water supply ports 9a and 9b and the drain ports 10a and 10b on the bottom surface or the side surface on the side that does not touch human eyes.

  In such a configuration, when cooling water is supplied from the water supply ports 9a and 9b, the cooling water enters the second water supply path 152 from the first water supply path 151 as shown in FIGS. The cover body 4 circulates in the circumferential direction along the second water supply path 152 (second groove 44).

  Then, the cooling water flows into the connection path 92 (first groove 921) on the back side of the casing 2 through the third water supply path 153 (through hole 9231 of the water partition wall 923). The cooling water that has flowed into the connection path 92 branches into the two passages 91 and flows through the inside of the casing 2 so as to reciprocate in the direction of the rotation axis.

  Then, the branched cooling water merges in the connection path 92 (first groove 921) on the front side of the casing 2, and is passed through the third drainage path 163 (through hole 9232 of the water partition wall 923). Into the second drainage channel 162. And cooling water distribute | circulates the circumferential direction of the cover body 3 along the 2nd drainage channel 162 (2nd groove | channel 34), and drains 10a and 10b via the 1st drainage channel 161. Discharged from.

As described above, according to the present embodiment, it is possible to maintain high cooling efficiency while forming a water channel for cooling the stator core 13 at low cost by easy processing. That is, the passage 91 can be easily formed in the casing 2 by, for example, linear drilling. In addition, the connecting path 92 is also formed with grooves in the end faces 21 and 22 so as to connect the openings of the passages 91, and the cover bodies 3 and 4 are used as water path forming members, and the cover bodies 3 are formed on the end faces 21 and 22. And 4 can be formed simply by joining the cover surfaces 33 and 43. Thereby, even when the rotating electrical machine 1 is enlarged without changing the thickness of the casing 2, the strength of the casing 2 is maintained as compared with the conventional spiral groove forming process for the double-structure casing. The water channel 90 can be formed by easy processing. Furthermore, by forming the water supply path 15 and the drainage path 16 on different sides (front side and back side) of the rotating electrical machine 1, the water supply position and the drainage position can be easily distinguished.
Further, according to the present embodiment, by using water instead of oil as the coolant for the stator core, a sufficient amount of water can be circulated through the water channel without being restricted by the Fire Service Act with respect to the maximum storage amount. Can do. Therefore, high cooling efficiency can be maintained.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, portions having the same configuration and functions as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 10 is a cross-sectional view of the rotating electrical machine 100 according to the present embodiment in the side surface direction. FIG. 11 is a view of developing the water channel 90 in the rotating electrical machine 100 in the circumferential direction of the casing 2. FIG. 6 is a schematic diagram showing a relationship with a path 16.

  As shown in FIGS. 10 and 11, the rotating electrical machine 100 of the present embodiment is provided with a water supply path 15 and a drainage path 16 on the same side of the casing 2 as compared to the rotating electrical machine 1 of the first embodiment. Yes. That is, the water supply channel 15 and the drainage channel 16 are both provided in the cover body 4. In the present embodiment, 32 passages 91 are formed.

  Specifically, as shown in FIG. 10, the second groove 44 formed in the cover surface 43 of the cover body 4 is formed deeper than the first embodiment, and the second groove 44 is formed in the second groove 44. Two water partition walls 923 and 924 are provided. One water partition wall 923 is provided at substantially the same surface position as the cover surface 43, and the other water partition wall 924 is provided between the water partition wall 923 and the bottom surface of the second groove 44. Thus, as shown in FIG. 11, the water channel formed by one water partition wall 923, the other water partition wall 924, and the second groove 44 forms the second water supply channel 152, and the other The water channel formed by the water partition wall 924 and the second groove 44 forms the second drainage channel 162. The first water supply path 151 is formed by communicating the water supply ports 9 a and 9 b with the second water supply path 152. Similarly, the first drainage channel 161 is formed by communicating the drainage ports 10 a and 10 b with the second drainage channel 162. The third water supply path 153 includes a through-hole 9231 formed in the water partition wall 923, as in the first embodiment.

  However, a connecting pipe 201 is provided at a location where the water supply channel 15 and the drainage channel 16 intersect to prevent interference of the cooling water. That is, as shown in FIG. 10 and FIG. 11, one of the two third drainage channels 163 includes a connecting channel 92 (first groove 921) of the casing 2 and a second drainage channel 162. 2 and a connecting pipe 201 communicating with the outside of the cover body 4.

  Further, as shown in FIG. 11, the other third drainage channel 163 is connected to the other through a connecting pipe for connecting a through hole 9231 of the water partition plate 923 and a through hole 9232 of the water partition plate 924. 202 is provided. The connecting pipe 202 prevents drainage from flowing between the water partition plate 923 and the water partition plate 924. A wall 203 is provided between the water partition plate 923 and the water partition plate 924 in order to determine the position of one end of the second water supply path 152.

  In such a configuration, when cooling water is supplied from the water supply ports 9 a and 9 b, the cooling water flows into the water channel 90 through the water supply channel 15 between the water partition plate 923 and the water partition plate 924. Then, the cooling water flows through the inside of the casing 2, then passes through the connection pipes 201 and 202, passes through the drainage path 16 between the water partition plate 924 and the second groove 44, and is discharged from the drainage ports 10 a and 10 b. Discharged.

  As described above, according to this embodiment, by concentrating the water supply channel 15 and the drainage channel 16 on one side, it is possible to improve the appearance of the side where the water supply channel 15 and the drainage channel 16 are not formed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  In the first embodiment described above, the water supply path 15 is provided in the cover body 4 and the drainage path 16 is provided in the cover body 3, but the water supply path 15 is provided in the cover body 3 and the drainage path 16 is provided in the cover body 4. Of course, it does not matter if it is provided.

  In the second embodiment described above, the water supply channel 15 and the drainage channel 16 are both provided in the cover body 4, but both may be provided in the cover body 3.

  In the first and second embodiments described above, the casing 2 is provided with the first groove, and the cover body 4 (and 3) is provided with the second groove. However, the casing 2 may be provided only in the cover body 3 or 4 without being provided with a groove.

  In the first and second embodiments described above, the water partition wall 923 (and 924) is provided on the cover body 4 (and 3), thereby adjusting the positions of the water supply port 9 and the drain port 10 and improving the appearance. I was trying. However, the water partition wall may be provided in only one of the water supply channel 15 and the drainage channel 16. In this case, on the other side, the water supply port 9 or the drain port 10 may be provided at a position corresponding to the opening of each passage 91. Moreover, when the improvement of appearance is not requested | required, the water partition wall 923 does not need to be provided at all.

  In the first and second embodiments described above, the second water supply channel 152 and the second water channel 152 and the second groove 44 (and 34) are formed by the water partition walls 923 (and 924) and the cover body 4 (and 3). 2 drainage channels 162 were formed. However, the second water supply channel 152 and the second drainage channel 162 are not limited to this configuration. For example, the ring part 42 (and 32) of the cover body 4 (and 3) is made into a double structure, and a groove is formed between both ring parts, whereby the second water supply path 152 and the second drainage path 162 are formed. It may be formed.

  In the first and second embodiments described above, the passage 91 is formed by drilling, but may be formed by other processing methods such as laser processing.

  In the first and second embodiments described above, the connecting path 92 includes the first groove 921 formed in each end surface 21 and 22 of the casing 2, and the cover surfaces 33 and 43 of the cover bodies 3 and 4. Formed with. However, for example, the connecting path 92 may be formed by embedding pipes that protrude from the end faces 21 and 22 of the casing 2 in the cover bodies 3 and 4. Further, the cover bodies 3 and 4 are configured to have a smaller diameter than the casing 2 so that the end faces 21 and 22 of the casing 2 are exposed, and the pipes are connected so as to protrude from the exposed end faces 21 and 22. A path 92 may be formed.

  In the present embodiment, the rotary electric machine used in the dynamo device has been described, but the present invention can be similarly applied to a rotary electric machine used for other purposes.

It is a front view of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a rear view of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a side view of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is sectional drawing of the side surface direction of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a figure which shows the end surface of the front side of the casing of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a figure which shows the end surface of the back side of the casing of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a figure which shows the cover surface of the cover body of the front side of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a figure which shows the cover surface of the cover body by the side of the back surface of the rotary electric machine which concerns on the 1st Embodiment of this invention. In the 1st Embodiment of this invention, it is the schematic diagram which expand | deployed the water channel in the circumferential direction of the casing, and showed the relationship with the said water supply channel and a drainage channel. It is sectional drawing of the side surface direction of the rotary electric machine which concerns on the 2nd Embodiment of this invention. In the 2nd Embodiment of this invention, it is the schematic diagram which expand | deployed the water channel in the circumferential direction of the casing, and showed the relationship with the said water supply channel and a drainage channel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 ... Rotary electric machine 2 ... Casing 3, 4, ... Cover body (equivalent to water channel formation member)
5 ... Shaft (equivalent to rotating shaft)
9 (9a, 9b) ... Water supply port 10 (10a, 10b) ... Drainage port 11 ... Rotor 13 ... Stator core 14 ... Coil 15 ... Water supply channel 16 ... Drainage channel 21, 22 ... End surface 33, 43 ... Cover surface 34, 44 ... Second groove 90 ... Water channel 91 ... Passage 92 ... Connection channel 151 ... First water supply channel 152 ... Second water supply channel 153 ... Third water supply channel 161 ... First drain channel 162 ... Second drain channel 163 ... Third drainage channel 201, 202 ... Connecting pipe 921 ... First groove 923, 924 ... Water partition wall 9231, 9232 ... Through hole

Claims (6)

A rotation axis;
A stator core provided around the rotor supported by the rotating shaft and wound with a coil;
A cylindrical casing provided in the vicinity of the periphery of the stator core and having a first end surface and a second end surface in the rotation axis direction;
A plurality of passages linearly formed in the casing so as to communicate the first end surface and the second end surface in the rotation axis direction;
A rotating electrical machine comprising: a water channel forming member that is joined to the first end surface and the second end surface and has at least a part of a connecting channel for connecting the plurality of channels to form a channel. The rotating electrical machine according to claim 1,
The casing has a first groove formed on each of the first end surface and the second end surface integrally with each opening of the passage,
The water channel forming member is two cover bodies each having a cover surface that is joined to the casing so as to cover the first end surface and the second end surface and that forms the connection channel together with the first groove. Rotating electric machine. The rotating electrical machine according to claim 2,
The cover body is
A water supply channel having a water supply port communicated with the first groove;
A rotating electrical machine comprising: a drainage channel having a drainage port communicated with the first groove. The rotating electrical machine according to claim 3,
A plurality of the first grooves are formed integrally with the openings of the two adjacent passages,
A plurality of the water supply passages and the drainage passages are formed so as to communicate with the different first grooves. The rotating electrical machine according to claim 3 or 4,
The water supply channel is
A first water supply channel formed in the radial direction of the cover body from the water supply port;
A second water supply channel connected to the first water supply channel and formed in a circumferential direction of the cover body;
A third water supply channel formed in the radial direction so as to connect the second water supply channel and the first groove;
The drainage channel is
A first drainage channel formed in the radial direction of the cover body from the drainage port;
A second drainage channel connected to the first drainage channel and formed in a circumferential direction of the cover body;
A rotating electrical machine having a third drainage channel formed in the radial direction so as to connect the second drainage channel and the first groove. It is a rotary electric machine of any one of Claims 3-5,
The water supply passage and the drainage passage are formed on the first end face side.

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