JP4441338B2 - Rotating machine - Google Patents

Description

  The present invention relates to a rotating machine.

  In general, a stator having a plurality of teeth portions arranged in an annular shape, a coil concentratedly wound around each of the teeth portions, a rotor provided inside the stator and rotated by a magnetic field generated from each teeth portion, There is known a rotating machine having a housing in a housing. In such a rotating machine, when the rotating machine is driven, a winding crossing part of each coil wound around each tooth part (referred to as a bent part protruding from the stator, hereinafter referred to as “coil end”) Since there is a problem that the performance of the rotating machine is reduced when heat is generated, it is necessary to forcibly cool the coil end. Conventionally, the following three techniques are known as techniques for such problems.

  As a first technique, there is a technique of providing a cooling pipe through which a refrigerant passes between a stator and a housing (see Patent Document 1). According to this technique, the heat generated at the coil end is absorbed by the refrigerant in the cooling pipe via the stator, whereby the coil end is cooled.

  As a second technique, by providing a cylindrical wall on the inner side (rotor side) of each coil end protruding from both ends of the stator, two chambers surrounding each coil end are formed between this wall and the inner surface of the housing. There is a technology to form (see Patent Document 2). According to this technique, by supplying cooling oil to one room from the outside, this cooling oil flows to a room on the opposite side through a space (slot) between each tooth portion provided in the stator. The coil end is directly cooled by the cooling oil by being discharged to the outside.

  As a third technique, a plurality of cooling oil spray ports formed so as to extend from the front surface to the back surface are provided in a disk-shaped bracket that closes the opening of the cylindrical housing, and these cooling oil sprays are provided. There is a technique in which a spray nozzle for spraying cooling oil on the mouth is mounted (see Patent Document 3). According to this technology, the cooling oil is sprayed from each spray nozzle toward the coil end located on the side thereof, so that the coil end is directly cooled by the cooling oil.

Japanese Patent Laid-Open No. 9-93869 JP 2003-224945 A Japanese Utility Model Publication No. 6-36363

  However, the first technique is effective because the cooling pipe is provided between the stator and the housing and the outer diameter of the rotating machine becomes large, or the coil end is cooled via the stator. In other words, the coil end cannot be cooled. In the second technique, in order to allow the cooling oil to pass through the slot, which is a narrow space, a large pump for pumping the cooling oil is required, which increases the cost.

  Furthermore, in the third technique, since a plurality of cooling oil spray ports are provided so as to come out from the front surface of the bracket to the back surface, each cooling oil is distributed to distribute the cooling oil sent from the pump to each cooling oil spray port. There was a problem that the number of pipes corresponding to the oil spray port was required, and the structure around the rotating machine was complicated.

  Accordingly, an object of the present invention is to provide a rotating machine capable of effectively cooling a coil end while mainly suppressing the outer diameter and cost.

The invention according to claim 1 of the present invention that solves the above-described problems includes a cylindrical stator, a substantially cylindrical rotor that is disposed in the stator and rotates with respect to the stator, and the stator or the rotor. A rotating machine comprising: a coil wound around the stator; and a housing that houses the stator, the rotor, and the coil, wherein the housing is formed with a length corresponding to the length of the stator in the axial direction. A frame and a pair of brackets joined to both end faces in the axial direction of the frame. At least one of the mating surfaces of the frame and the bracket is formed with a groove, and the frame said by joining the bracket, an opening as in a radial direction of the rotor facing the coil end of the coil, and out of the housing Wherein the flow path that communicates is formed.

  Here, the “coil end” refers to a bent portion that protrudes from the stator or rotor of the coil wound around the stator or rotor as described above.

  According to the first aspect of the present invention, since the flow path opens so as to face the coil end of the coil in the radial direction of the rotor, for example, the axial direction of the rotor is horizontal and the flow path is the coil end. When the rotating machine is installed so as to be positioned above the refrigerant, when the refrigerant is supplied to the flow path, the refrigerant falls on the coil end by gravity, and the coil end is directly cooled.

Further, according to the invention described in claim 1, since the flow path is a groove formed on the mating surface of the frame and the bracket, for example, the production can be easily performed, at the time of maintenance, the frame By simply disassembling the bracket , the inside of the channel can be easily visually confirmed.

Invention of Claim 2 is a rotary machine of Claim 1 , Comprising: The said groove | channel is a guide groove formed along the surrounding wall of the said housing, The said flow path is the said guide groove, The injection portion communicated with the outside of the housing and the guide groove, and a plurality of introduction portions communicated with the inside of the housing and the guide groove.

According to the second aspect of the present invention, since the refrigerant is introduced into the housing from the plurality of introduction portions through the guide groove only by supplying the refrigerant to the injection portion, the refrigerant is discharged from the plurality of introduction portions. The coil end can be efficiently cooled by the refrigerant. Moreover, when only one injection | pouring part is provided, since the piping for cooling connected to a rotary machine (injection part) can be made into one, the structure around a rotary machine can be simplified.

A fourth aspect of the present invention is the rotating machine according to the second aspect , wherein the injection portion and the introduction portion are formed in a groove shape.

According to the invention described in claim 4, since the injection portion and the introduction portion are formed as a groove on the mating surface, for example, at the time of maintenance, the inside of the injection portion and the introduction portion can be easily removed by simply disassembling the frame and the bracket. It can be visually recognized. Further, when the injection part and the introduction part are formed simultaneously with the guide groove, the manufacture is easy.

The invention of claim 5 is a rotating machine according to any one of claims 1 to 4, the mating surface of the groove constituting the channel is formed, A discharge groove for discharging the refrigerant introduced into the housing through the flow path to the outside of the housing is formed.

According to the fifth aspect of the present invention, since the discharge groove is formed on the mating surface, for example, during maintenance, the inside of the discharge groove can be easily visually recognized simply by disassembling the frame and the bracket . Further, when the discharge groove is formed at the same time as the guide groove, the manufacture is easy.

  According to the first aspect of the present invention, the coil end is directly cooled by this refrigerant only by supplying the refrigerant to the flow path having an opening formed so as to face the coil end of the coil in the radial direction of the rotor. Therefore, the coil end can be effectively cooled while suppressing the outer diameter and cost.

Further, according to the invention described in claim 1, since the flow path is a groove formed on the mating surface of the frame and the bracket, it is possible to achieve for example a reduction in productivity improvement and the manufacturing cost In addition, at the time of maintenance, the inside of the flow path can be easily visually recognized simply by disassembling the frame and the bracket , and the maintenance work can be performed efficiently.

According to the second aspect of the present invention, for example, the refrigerant supplied to one injection portion can be introduced into the housing from a plurality of introduction portions, so that the coil end is made efficient by the refrigerant discharged from the plurality of introduction portions. It is possible to cool well, and only one cooling pipe connected to the rotating machine is required, and the structure around the rotating machine can be simplified.

According to the invention of claim 4, since the injection part and the introduction part is a groove formed on the mating surface of the frame and the bracket, for example during maintenance infusion unit by simply disassembling the frame and bracket and The inside of the introduction part can be easily visually confirmed, and the maintenance work can be performed efficiently. In addition, when the injection part and the introduction part are formed at the same time as the guide groove, it is possible to improve productivity and reduce manufacturing costs.

According to the fifth aspect of the present invention, since the discharge groove is formed on the mating surface of the frame and the bracket , for example, during maintenance, the inside of the discharge groove can be easily visually recognized simply by disassembling the frame and the bracket. The maintenance work can be performed efficiently. Further, when the discharge groove is formed at the same time as the guide groove, it is possible to improve productivity and reduce manufacturing cost.

[First Embodiment]
Next, a first embodiment of a rotating machine according to the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a cross-sectional view (a) showing the rotating machine according to the first embodiment, and a cross-sectional view (b) along AA in FIG. 1 (a), and FIG. 2 is a housing of FIG. FIG.

  As shown in FIGS. 1A and 1B, the rotating machine 1 includes a stator 10 formed in a substantially cylindrical shape, coils 20 wound around each tooth portion 11 of the stator 10, and the stator 10. And a substantially cylindrical rotor 30 that rotates and a housing 40 that houses the stator 10, the coil 20, and the rotor 30.

  As shown in FIG. 1B, the stator 10 is mainly composed of a plurality of teeth portions 11 arranged in an annular shape and an annular core portion 12 that integrally couples the base end portions of these teeth portions 11. It is configured. In addition, each teeth part 11 and the core part 12 are formed so that it may extend in the axial direction of the shaft 31 shown to Fig.1 (a).

  As shown in FIG. 1B, the coil 20 is intensively wound around each tooth portion 11, and a predetermined current (U phase, V phase, W phase) is applied to each coil 20 thus concentrated. ), A predetermined magnetic field is generated from the tip of each tooth portion 11 toward the rotor 30. In addition, each coil 20 is formed such that a portion bent at the time of winding protrudes from both end faces 10a of the stator 10 as shown in FIG. In the following description, the protruding portion is referred to as a coil end 20a.

  The rotor 30 is disposed in the stator 10, and permanent magnets serving as different poles are alternately disposed at appropriate positions on the outer peripheral surface thereof, and the mounting holes 30 a for integrally coupling the shaft 31 to the center thereof. Is formed. The rotor 30 configured as described above is rotated with respect to the stator 10 by the magnetic field generated from each tooth portion 11, whereby the shaft 31 is rotated with respect to the housing 40. Yes. In addition, the shaft 31 is rotatably supported by a bearing Be described later, whereby the rotor 30 is disposed in the stator 10 with a predetermined gap from the stator 10.

  The housing 40 is divided into a plurality of parts in the axial direction of the shaft 31. That is, as shown in FIG. 2, the housing 40 is joined to a substantially cylindrical frame 41 to which the stator 10 is fixed and to both end faces 41 a (hereinafter also referred to as “matching faces 41 a”) of the frame 41. It is mainly composed of two brackets 42.

  The mating surface 41a (both end surfaces 41a) of the frame 41 has an annular guide groove 41c formed along the peripheral wall 41b of the frame 41, and an injection groove (injection portion) communicating with the guide groove 41c and the outside of the frame 41. ) 41d, and five introduction grooves (introduction portions) 41e communicating with the guide groove 41c and the inside of the frame 41 are mainly formed. Further, a portion on the opposite side of the injection groove 41d across the central axis of the frame 41 includes a first discharge groove 41f communicating with the inside of the frame 41 and the guide groove 41c, the guide groove 41c and the frame 41. A second discharge groove 41g communicating with the outside is formed.

  As shown in FIG. 1A, the frame 41 is formed to have a length that is substantially the same as the axial length of the stator 10 (specifically, a slightly larger length). Thereby, each introduction groove 41e formed in the mating surface 41a (see FIG. 2) is arranged so as to overlap with the coil end 20a in the radial direction of the shaft 31 (rotor 30). In other words, each introduction groove 41 e is open so as to face the coil end 20 a in the radial direction of the shaft 31. Further, as shown in FIG. 1 (b), the introduction grooves 41e are arranged in a balanced manner at equal intervals in one half of the frame 41 (the portion that becomes a semicircular arc on one side when divided on the basis of a certain diameter). By doing so, it arrange | positions so that the coil end 20a located in the half of one side among each coil end 20a arrange | positioned cyclically | annularly may be covered.

  As shown in FIG. 2, the two brackets 42 have the same structure as each other, and are each formed in a substantially bottomed cylindrical shape, and an insertion hole 42n for inserting the shaft 31 into the bottom portion 42m is formed. Has been. A bearing Be (see FIG. 1) for rotatably supporting the shaft 31 is fixed to each insertion hole 42n. In addition, guide grooves 42c corresponding to the guide grooves 41c formed in the frame 41 are formed on the end surfaces 42a of the brackets 42 (which are surfaces that meet the mating surface 41a of the frame 41 and are also referred to as “mating surfaces 42a” hereinafter). An injection groove (injection part) 42d corresponding to the injection groove 41d on the frame 41 side and a discharge groove 42g corresponding to the second discharge groove 41g on the frame 41 side are formed.

  And the flow path used as the passage of cooling oil (refrigerant) will be formed in the housing 40 by match | combining the mating surface 42a of the bracket 42 formed in this way, and the mating surface 41a of the flame | frame 41. FIG. . Specifically, an injection flow path is formed by combining the injection groove 42d on the bracket 42 side and the injection groove 41d on the frame 41 side, and the guide groove 42c on the bracket 42 side and the guide groove 41c on the frame 41 side As a result, an annular flow path along the peripheral wall 41b of the housing 40 is formed. Further, a flow path for introducing cooling oil into the housing 40 is formed by aligning the inner portion of the mating surface 42a on the bracket 42 side with the introduction groove 41e on the frame 41 side, and the mating surface 42a on the bracket 42 side is formed. By aligning the inner portion with the first discharge groove 41f on the frame 41 side and aligning the discharge groove 42g on the bracket 42 side with the second discharge groove 41g on the frame 41 side, the housing 40 or the guide grooves 42c, 41c Thus, a flow path for discharging the cooling oil to the outside is formed. In the following description, for the sake of convenience, the flow path for injecting the cooling oil is referred to as an injection flow path 51, as shown in FIG. The flow path for introducing the cooling oil is referred to as an introduction flow path 53, and the discharge flow paths are referred to as discharge flow paths 54 and 55.

  Next, a method for cooling the coil end 20a in the rotating machine 1 will be described with reference to FIG. In the drawings to be referred to, FIG. 3 is a cross-sectional view (a) showing how the cooling oil supplied from the injection flow path is introduced into the housing from each introduction flow path, and a cross section showing the cooling oil flowing down from each coil end. FIG. In the following description, the rotating machine 1 is installed such that the shaft 31 (see FIG. 1A) is horizontal and the discharge flow path 55 is located on the lower side (the deepest part of the housing 40). Has been.

  As shown in FIG. 3A, when cooling oil is supplied to the injection flow path 51 by a hydraulic pump (not shown), a part of the cooling oil enters the housing 40 from the introduction flow path 53 positioned at the uppermost position. And the remainder flows along the guide channel 52. In addition, when the cooling oil flowing in the induction flow path 52 reaches each introduction flow path 53, a part of the cooling oil enters the housing 40 from the introduction flow path 53, as described above. The remainder flows along the guide channel 52. That is, the cooling oil sent from the hydraulic pump toward the rotating machine 1 enters the housing 40 from the five introduction passages 53 via the injection passage 51 and the induction passage 52.

  The cooling oil introduced into the housing 40 from each introduction channel 53 falls onto the coil end 20a located in the vicinity of each introduction channel 53, and directly cools the coil end 20a. In addition, the heat of the coil end 20a (for example, the coil end 20a located next to the coil end 20a located at the uppermost position) where the cooling oil is not directly applied is heated to the coil end 20a (for example, the uppermost position). By being absorbed by the stator 10 cooled by the coil end 20a) positioned, the coil end 20a to which the cooling oil is not directly applied is also indirectly cooled.

  And the cooling oil which contributed to cooling of the coil end 20a located in the vicinity of each introduction flow path 53 falls, as shown in FIG.3 (b), and reaches | attains on the coil end 20a located in the downward direction after that. Thus, the coil end 20a is cooled. The cooling oil falling from the upper coil end 20a is deprived of heat by touching air having a temperature lower than that of the cooling oil in the middle of dropping. It will play the role of taking away heat.

  The cooling oil that has cooled the lower coil end 20 a in this way moves to the discharge channel 54 located at the deepest part of the inner surface of the housing 40 directly or along the inner surface of the housing 40, thereby causing the discharge channel 54. , 55 to the outside. Note that the cooling oil that has not contributed to the cooling that travels along the guide channel 52 is also discharged to the outside through the discharge channel 55. That is, the high temperature cooling oil that has taken heat from the coil end 20a is mixed with the low temperature cooling oil that does not directly contribute to cooling in the vicinity of the discharge passage 55, thereby lowering the temperature of the entire cooling oil. It will be returned to the hydraulic pump later.

According to the above, the following effects can be obtained in the first embodiment.
By simply supplying the cooling oil to the flow paths 51 to 55, the cooling oil can be dropped onto the coil end 20a, and the coil end 20a can be directly cooled with the cooling oil, thereby reducing the outer diameter and cost. However, the coil end 20a can be effectively cooled.

  Since the channels 51 to 55 are formed on the mating surface 41a of the frame 41 and the mating surface 42a of the bracket 42, for example, during maintenance, the inside of the channels 51 to 55 can be easily removed by simply removing the bracket 42 from the frame 41. Can be visually recognized. Therefore, for example, it is only necessary to find a clogged portion and clean only that portion, so that the maintenance work can be performed efficiently.

  Since the cooling oil supplied to one injection channel 51 can be introduced into the housing 40 from the plurality of introduction channels 53, the coil end 20a is efficiently cooled by the cooling oil discharged from the plurality of introduction channels 53. In addition, only one cooling pipe connected to the rotating machine 1 is required, and the peripheral structure of the rotating machine 1 can be simplified.

  Further, a guide groove 41c, an injection groove 41d, an introduction groove 41e, a first discharge groove 41f and a second discharge groove 41g provided on the mating surface 41a of the frame 41, a guide groove 42c provided on the mating surface 42a of the bracket 42, injection Since the flow paths 51 to 55 are configured by the groove 42d and the discharge groove 42g, compared to a conventional structure in which a flow path is formed by machining a hole in a disc-shaped bracket by a drill or the like, it is simpler by casting, for example. A flow path can be formed in this. Specifically, for example, only a convex portion corresponding to the shape of the guide groove 41c, the injection groove 41d, the introduction groove 41e, the first discharge groove 41f, and the second discharge groove 41g is formed on the core that forms the mating surface 41a. A complicatedly shaped channel formed by these grooves can be easily formed.

  The cooling oil that has become hot due to the removal of heat from the coil end 20a is cooled by the low-temperature cooling oil that bypasses the induction flow path 52 and flows to the discharge flow path 55. For example, to cool the cooling oil Without providing a radiator or the like, the cooling oil coming out of the rotating machine 1 can be supplied to the rotating machine 1 again as it is. Moreover, since the cooling oil that does not contribute to the cooling of the coil end 20a passes through the guide passage 52 along the peripheral wall of the housing 40, the cooling oil is further cooled if the environment outside the housing 40 is in a low temperature state. Thus, the high-temperature cooling oil that comes out of the housing 40 can be lowered.

  Since the guide channel 52 is formed in an annular shape and is connected to the discharge channel 55, the cooling oil may flow backward from the injection channel 51 to the outside even if all the introduction channels 53 are clogged. Can be prevented.

[Second Embodiment]
Below, 2nd Embodiment of the rotary machine which concerns on this invention is described. Since this embodiment is obtained by changing the structure of the housing 40 in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the drawings to be referred to, FIG. 4 is an exploded perspective view showing a housing according to the second embodiment, and FIG. 5 is a cross-sectional view (a) showing a rotating machine according to the second embodiment, and FIG. It is BB sectional drawing (b).

  As shown in FIG. 4, the housing 60 is mainly configured by a frame 61 and two brackets 62 that are slightly different in structure from the first embodiment.

  The frame 61 has basically the same structure as that of the first embodiment, but the guide groove 61c formed on the mating surface 41a has a substantially semicircular shape, and the introduction groove 41e has seven This is different from the first embodiment in that it is provided at a place and the first discharge groove 41f and the second discharge groove 41g are not formed. Specifically, the guide groove 61c is formed in an arc shape having a size capable of communicating with the injection groove 41d and the seven introduction grooves 41e.

  The bracket 62 basically has the same structure as that of the first embodiment, but the guide groove 62c formed on the mating surface 42a has a substantially semicircular shape, and the discharge groove 42g is formed. This is different from the first embodiment in that the discharge hole 62g is formed in the bottom portion 42m of the bottom portion 42m. Here, the guide groove 62 c has a shape corresponding to the guide groove 61 c formed in the frame 61. Further, as shown in FIG. 5A, the discharge hole 62g is opposite to the injection groove 42d across the insertion hole 42n, and at a position substantially coincident with the inner peripheral surface 62h of the bracket 62. The shaft 31 is formed in the same direction as the axial direction so as to communicate from the inside to the outside. In other words, the discharge hole 62g is formed to be positioned at the deepest portion of the housing 60 when the rotating machine 2 is installed such that the injection groove 42d is positioned at the uppermost position.

  Next, a method for cooling the coil end 20a in the rotating machine 2 according to the second embodiment will be described with reference to FIGS. 5 (a) and 5 (b). In the following description, the flow path for injecting the cooling oil is referred to as the injection flow path 51 and the flow path for introducing the cooling oil into the housing 60 is referred to as the introduction flow path 53, as described above. A substantially semicircular channel formed by the guide groove 61c and the guide groove 62c is referred to as a guide channel 52 ′.

  As shown in FIGS. 5 (a) and 5 (b), when cooling oil is supplied to the injection flow path 51 by a hydraulic pump (not shown), a part of the cooling oil goes out from each introduction flow path 53 into the housing 60. At the same time, the remainder flows to both ends of the substantially semicircular guide channel 52 ′. When the cooling oil reaches the both ends of the guide flow path 52 ′ in this way, the cooling oil accumulates from both ends, and after a predetermined time has elapsed, the guide flow path 52 ′ is made of cooling oil. It will be satisfied.

  When the guide channel 52 ′ is thus filled with the cooling oil, the cooling oil is ejected from each introduction channel 53 toward the coil end 20 a in the housing 60. When the cooling oil ejected vigorously as described above collides with the coil end 20a, the cooling oil scatters and is also applied to the coil end 20a around it. That is, the cooling oil ejected from each introduction channel 53 not only cools the coil end 20a in the vicinity of the outlet of each introduction channel 53, but also directly cools the coil end 20a around it.

  Further, the cooling oil that has contributed to cooling of the coil end 20a located in the vicinity of each introduction flow path 53 then falls and reaches the coil end 20a located below to cool the coil end 20a. Will be. And the cooling oil which cooled the lower coil end 20a in this way is discharged | emitted outside through the discharge hole 62g by moving to the deepest part of the housing 60 directly or along the inner surface of the housing 60. .

According to the above, the following effects can be obtained in the second embodiment.
Since the cooling oil is ejected from each introduction channel 53, not only the coil end 20a in the vicinity of the outlet of each introduction channel 53 can be cooled, but also the coil end 20a around it can be directly cooled, Cooling efficiency can be increased. Further, unlike the first embodiment, the cooling oil supplied to the injection flow channel 51 all contributes to the cooling of the coil end 20a.

In addition, this invention is implemented in various forms, without being limited to the said embodiment.
The rotating machines 1 and 2 in the present embodiment may be used for any purpose, for example, as an electric motor or a generator.

  In the present embodiment, the rotating machines 1 and 2 are installed sideways (the direction in which the shaft 31 is horizontal). However, for example, in the second embodiment, when the cooling oil is ejected vigorously, the rotating machine 2 is oriented vertically (the shaft You may install in the direction where 31 becomes vertical. Note that when it is assumed that they are installed vertically as described above, it is desirable to form the guide channel 52 ′ and the introduction channel 53 over the entire circumference of the housing 60. Further, the cooling oil for cooling the coil end 20a located on the lower side is provided with a discharge hole 62g in the bottom 42m of the bracket 62, so that the cooling oil can be satisfactorily obtained even when the rotating machine 2 is oriented vertically as described above. Can be discharged. The cooling oil for cooling the coil end 20a located on the upper side may be formed with discharge passages 54 and 55 at portions opposite to the injection passage 51 across the central axis of the frame 41 as in the first embodiment. .

They are sectional drawing (a) which shows the rotary machine which concerns on 1st Embodiment, and AA sectional drawing (b) of Fig.1 (a). It is a disassembled perspective view which shows the housing of FIG. They are sectional drawing (a) which shows a mode that the cooling oil supplied from the injection flow path is introduce | transduced in a housing from each introduction flow path, and sectional drawing (b) which shows a mode that cooling oil flows down from each coil end. It is a disassembled perspective view which shows the housing which concerns on 2nd Embodiment. It is sectional drawing (a) which shows the rotary machine which concerns on 2nd Embodiment, and BB sectional drawing (b) of Fig.5 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating machine 10 Stator 20 Coil 20a Coil end 30 Rotor 40 Housing 41 Frame 41a Matching surface 41b Peripheral wall 41c Guide groove 41d Injection groove 41e Introduction groove 41f First discharge groove 41g Second discharge groove 42 Bracket 42a Matching surface 42c Guide groove 42d Injection Groove 42g Discharge groove 51 Injection flow path 52 Guide flow path 53 Introduction flow path 54 Discharge flow path 55 Discharge flow path

Claims (6)

A cylindrical stator;
A substantially cylindrical rotor disposed within the stator and rotating relative to the stator;
A coil wound around the stator or the rotor;
A housing for housing the stator, the rotor and the coil,
The housing is composed of a frame formed with a length corresponding to the length in the axial direction of the stator, and a pair of brackets joined to both axial end surfaces of the frame,
A groove is formed on at least one of the mating surfaces of the frame and the bracket,
By bonding the said frame bracket, the rotating machine, characterized in that an opening to face the coil end of the coil in the radial direction of the rotor, the flow path communicating with the inside and outside of the housing is formed . The rotating machine according to claim 1 ,
The groove is a guide groove formed along a peripheral wall of the housing;
The flow path is
The guide groove;
An injection part communicating with the outside of the housing and the guide groove;
A rotating machine comprising a plurality of introduction portions communicating with the inside of the housing and the guide groove. The rotating machine according to claim 2,
The injection part is composed of a groove formed on the mating surface of the frame and a groove formed on the mating surface of the bracket,
Each introduction part is configured by a groove formed in a mating surface of the frame. The rotating machine according to claim 2 ,
The rotating machine characterized in that the injection part and the introduction part are formed in a groove shape. A rotary machine according to any one of claims 1 to 4,
A discharge groove for discharging the refrigerant introduced into the housing through the flow path to the outside of the housing is formed on the mating surface in which the groove constituting the flow path is formed. Rotating machine. The rotating machine according to claim 5,
The groove is a guide groove formed in an annular shape along the peripheral wall of the housing,
The discharge groove communicates with the inside of the housing and the guide groove, and communicates with the outside of the housing and the guide groove.

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