JP6681788B2 - Fluid machine with integrated motor - Google Patents

Description

  The present invention relates to a motor-integrated fluid machine including a fluid machine and a motor that drives the fluid machine.

  2. Description of the Related Art Conventionally, there is known a motor-integrated fluid machine in which a motor and a fluid machine that is directly connected to one end of a rotor provided in the motor and driven are integrated, as seen in a blower or the like. This motor-integrated fluid machine becomes inoperable when the temperature of the motor exceeds a guaranteed temperature set based on, for example, the heat resistant temperature of the insulating species used in the motor, because it causes damage. Therefore, in the motor-integrated fluid machine, it is necessary to actively cool the coil end portion, which has a relatively large amount of heat generation, and the stator and the rotor, so that the temperature of the motor does not exceed the guaranteed temperature. .

  As a method of cooling a motor, a method of using a cooling fan to flow a cooling fluid through a coil end portion or a gap between a stator and a rotor is generally used. In the case of a motor-integrated fluid machine, there is a quantity of heat that enters the motor by heat conduction from the fluid machine side. It is also known that this heat quantity increases as the suction flow rate of the fluid machine decreases. Therefore, the flow rate of the cooling fluid required for cooling may increase, and a situation may arise in which a plurality of cooling fans must be used for cooling. However, since the addition of cooling fans leads to an increase in installation space and power consumption, it is required to cool the motors with a reduced number of cooling fans installed.

As a background art of this technical field, for example, the technologies described in Patent Documents 1 and 2 have been proposed.
Japanese Patent Application Laid-Open Publication No. 2004-187242 discloses that in a motor-integrated fluid machine in which a fluid machine and its drive motor are integrated, a cooling fluid is applied to a casing (inner barrel 11) of the drive motor in at least the stator 6 in the casing. A plurality of cooling fluid introduction holes are provided on both sides, a slit s through which the cooling fluid flows is provided in the central portion of the stator, and a cooling fluid discharge path 2 communicating with the slits is provided through the casing. A cooling fluid passage is formed in which the cooling fluid flowing in from each cooling fluid introduction hole flows into the gap between the stator and the rotor from both ends and is discharged through the slit and the cooling fluid discharge passage, and further between the casing of the fluid machine and the drive motor. To form a cooling fluid passage through which a cooling medium flows "(see summary).

  Japanese Patent Application Laid-Open No. 2004-242242 discloses that "a housing is provided with a compression mechanism 3 and an electric motor 4 for driving the compression mechanism 3, and the electric motor 4 has a coil wound around a stator core 24 fixed in the housing 2. And a rotor 22 fixed to the drive shaft 10 and rotatably arranged inside the stator 21. The electric motor accommodation space in which the electric fluid 4 is accommodated in the fluid to be compressed. In the configuration in which the fluid is guided to the compression mechanism 3 through the 12a, a suction port 30 for introducing a fluid to be compressed is formed between the housing 2 and the stator core 24 by forming a fluid introduction passage 31 extending along the axial direction of the drive shaft 10. Is provided at a position facing the outer peripheral surface of the stator core 24 of the housing 2 and is connected to the fluid introduction passage 31 (see the summary).

JP-A-6-346891 International Publication No. 2013/172189

  In the technique described in Patent Document 1, a plurality of cooling fluid introduction holes for introducing the cooling fluid into at least both sides of the stator in the motor casing are provided. Further, a slit through which a cooling fluid flows is provided in the axial center of the stator, and a cooling fluid discharge passage communicating with the slit is provided through the motor casing. The cooling fluid that has flowed in from the plurality of cooling fluid introduction holes flows into the gap between the stator and the rotor from both ends, and is discharged through the slits and the cooling fluid discharge passage.

  According to the technique described in Patent Document 1, it is possible to cool both ends of the stator by causing a cooling fluid to flow into both sides of the stator. However, the technique described in Patent Document 1 has a structure in which the cooling fluid that has passed through both ends of the stator is exhausted from the central portion in the axial direction of the stator through the gap between the stator and the rotor. Therefore, the axial center of the stator cannot be cooled sufficiently because the temperature of the cooling fluid flowing therein has already risen.

  In the technique described in Patent Document 2, a fluid introduction path provided along the axial direction of the drive shaft is formed between the housing and the stator core. Further, a suppression mechanism that suppresses the flow of the fluid to be compressed flowing from the suction port toward the compression mechanism in the fluid introduction passage is provided.

  As described above, in the motor-integrated fluid machine, the heat on the fluid machine side enters the motor by heat conduction, so the temperature of the motor on the fluid machine side becomes higher than that on the non-fluid machine side. Moreover, in the technique described in Patent Document 2, the fluid to be compressed (cooling fluid) flows into the fluid machine side after the fluid has flowed on the side opposite to the fluid machine and the temperature has risen. Therefore, the fluid machine side of the motor cannot be sufficiently cooled.

  The present invention has been made in view of the above circumstances, and an object thereof is to cool a motor in a motor-integrated fluid machine more efficiently.

In order to achieve the above object, a motor-integrated fluid machine according to the present invention includes a fluid machine and a motor that drives the fluid machine, and the motor is provided on a motor casing and an outer peripheral side of the motor casing. The cover, a rotatable rotor whose one end is connected to the fluid machine, and a stator arranged on the outer peripheral side of the rotor and fixed to the inner peripheral side of the motor casing. Includes an intake port for sucking a cooling fluid and an exhaust port for exhausting the cooling fluid, wherein the motor casing introduces the cooling fluid into the motor casing from the intake port. A hole and a cooling fluid lead-out hole for leading the cooling fluid from the inside of the motor casing to the exhaust port, and the outer peripheral surface of the motor casing and the cover. Between the peripheral surface, the is cooling channel through which a cooling fluid passes is formed, and irregularities are provided on the outer peripheral surface of the motor casing, said stator shaft by a slit communicating with the outer peripheral surface of the rotor Direction, and has two coil ends respectively formed at both ends, and the cooling fluid lead-out hole is provided from the coil end closer to the fluid machine of the two coil ends to the exhaust port. To the exhaust port, a first lead-out hole for leading out the cooling fluid to the exhaust port, a second lead-out hole for leading out the cooling fluid to the exhaust port from a coil end of the two coil ends that is farther from the fluid machine. A third lead-out hole for leading the cooling fluid to an exhaust port is provided, and the cooling-fluid introduction hole is a coil of the two coil ends that is closer to the fluid machine from the intake port. Wherein the has first inlet for introducing a cooling fluid, and from the intake port is composed only of the third introduction hole for introducing the cooling fluid into the slit to-ended.
A motor-integrated fluid machine according to the present invention includes a fluid machine and a motor that drives the fluid machine, the motor includes a motor casing, and a cover provided on an outer peripheral side of the motor casing, The cover has a rotatable rotor having one end connected to the fluid machine, and a stator arranged on an outer peripheral side of the rotor and fixed to an inner peripheral side of the motor casing, and the cover holds a cooling fluid. An intake port for sucking in and an exhaust port for exhausting the cooling fluid are provided, and the motor casing has a cooling fluid introduction hole for introducing the cooling fluid into the motor casing from the intake port, and the motor. A cooling fluid lead-out hole for leading out the cooling fluid from the inside of the casing to the exhaust port, and between the outer peripheral surface of the motor casing and the inner peripheral surface of the cover, A cooling flow path through which the cooling fluid passes is formed, unevenness is provided on the outer peripheral surface of the motor casing, and the stator has two coil ends formed at both ends thereof. The lead-out hole is a first lead-out hole for leading the cooling fluid from one of the two coil ends closer to the fluid machine to the exhaust port, and one of the two coil ends is the fluid machine. There is a second lead-out hole for leading the cooling fluid from the distant coil end to the exhaust port, and the cooling fluid introduction hole is provided from the intake port to one of the two coil ends that is closer to the fluid machine. It is characterized in that it is composed of only a first introduction hole for introducing the cooling fluid to the coil end.

  According to the present invention, the motor in the motor-integrated fluid machine can be cooled more efficiently.

It is a schematic sectional drawing which shows the structure of the motor integrated fluid machine which concerns on 1st Embodiment of this invention. It is an AA sectional view of FIG. It is a BB sectional view of FIG. 1. It is CC sectional drawing of FIG. FIG. 2 is a sectional view taken along line D-D of FIG. 1. It is a schematic perspective view of the cover shown in FIG. It is a QQ sectional view of FIG. It is a figure which shows the cooling effect of a motor. It is a schematic sectional drawing which shows the structure of the motor of the motor integrated fluid machine which concerns on 2nd Embodiment of this invention. FIG. 10 is a sectional view taken along line HH of FIG. 9. It is a schematic sectional drawing which shows the structure of the motor of the motor integrated fluid machine which concerns on 3rd Embodiment of this invention. FIG. 12 is a sectional view taken along line I-I of FIG. 11.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In each drawing, common or similar components are designated by the same reference numerals, and redundant description thereof will be appropriately omitted.

(First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic cross-sectional view showing the structure of a motor-integrated fluid machine 100 according to the first embodiment of the present invention. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is a sectional view taken along line CC of FIG. FIG. 5 is a sectional view taken along the line D-D in FIG. 1. FIG. 6 is a schematic perspective view of the cover 6 shown in FIG. FIG. 7 is a sectional view taken along line QQ of FIG. 4 and 5, the illustration of the fluid machine 1 is omitted.

  As shown in FIG. 1, the motor-integrated fluid machine 100 includes a fluid machine 1 and a motor 2 that drives the fluid machine 1. The arrow indicated by the thick broken line in FIG. 1 indicates the flow of the working fluid. The thick solid line arrow in FIG. 1 indicates the flow of the cooling fluid 12, which is the fluid used to cool the motor 2.

  The fluid machine 1 includes a blower casing 16. Inside the blower casing 16, there are provided an impeller 17 that is mounted on the rotor 3 that is the rotating shaft of the motor 2 to rotate, and a diffuser 18 that changes the dynamic pressure component of the working fluid into a static pressure component.

  The impeller 17 raises the temperature and pressure of the working fluid sucked from the fluid suction port 19 and sends the working fluid radially outward. The working fluid delivered from the impeller 17 has its dynamic pressure component converted into a static pressure component by the diffuser 18 provided on the outer side of the impeller 17 in the radial direction, and flows to the outer side of the diffuser 18 in the radial direction. The working fluid that has flowed to the outside in the radial direction of the diffuser 18 is discharged from a fluid discharge port (not shown) provided in the blower casing 16 in a direction perpendicular to the paper surface of FIG. 1, for example.

  The motor 2 includes a motor casing 5 and a cover 6 provided on the outer peripheral side of the motor casing 5. The motor 2 has a rotatable rotor 3 having one end connected to the fluid machine 1, and a stator 4 arranged on the outer peripheral side of the rotor 3 and fixed to the inner peripheral side of the motor casing 5. ing.

  The cover 6 covers the outer peripheral surface of the motor casing 5 and has a cylindrical shape. The rotor 3 is directly connected to the impeller 17, and its both ends are rotatably supported by bearings 22a and 22b. The stator 4 has two coil ends 14a and 14b formed at both ends. Further, the stator 4 is axially divided by a slit 13 that communicates with the outer peripheral surface of the rotor 3.

  As shown in FIG. 6, the cover 6 has an intake port 8 (see FIGS. 1 to 4) for sucking the cooling fluid 12 and an exhaust port 9 (see FIGS. 2 to 5) for exhausting the cooling fluid 12. And are equipped with. Here, a pair of intake ports 8 are provided above and below the cover 6, and a pair of exhaust ports 9 are provided on the left and right of the cover 6. The intake port 8 and the exhaust port 9 are each formed on a flat surface 6a where a part of the outer peripheral surface of the cover 6 is flattened, and have, for example, rectangular holes that penetrate the cover 6 in the radial direction. The cooling fluid 12 is configured to be forcibly supplied into the cover 6 by a cooling fan (not shown).

  As shown in FIGS. 1 and 5, the motor casing 5 guides the cooling fluid from the intake port 8 into the motor casing 5 and the cooling fluid from the motor casing 5 to the exhaust port 9. The cooling fluid lead-out hole 11 is provided. The cooling fluid introduction hole 10 communicates with the intake port 8 and is arranged so that the central axis of the cooling fluid introduction hole 10 passes through the inside of the intake port 8. The cooling fluid lead-out hole 11 communicates with the exhaust port 9, and is arranged such that the central axis of the cooling fluid lead-out hole 11 passes through the inside of the exhaust port 9.

  As shown in FIG. 1, the cooling fluid introduction hole 10 has a first introduction hole 10a, a second introduction hole 10c, and a third introduction hole 10b, which are provided in a pair at the top and the bottom, respectively. The first introduction hole 10a is for introducing the cooling fluid 12 from the intake port 8 to the coil end 14a which is closer to the fluid machine 1 of the two coil ends 14a and 14b. The second introduction hole 10c is for introducing the cooling fluid 12 from the intake port 8 to the coil end 14b of the two coil ends 14a and 14b which is farther from the fluid machine 1. The third introduction hole 10b is for introducing the cooling fluid 12 from the intake port 8 to the slit 13.

  The first introduction hole 10a is arranged so that the central axis of the first introduction hole 10a passes through the coil end 14a. The second introduction hole 10c is arranged so that the central axis of the second introduction hole 10c passes through the coil end 14b. The third introduction hole 10b is arranged so that the central axis of the third introduction hole 10b passes through the slit 13. Here, the first introduction hole 10a, the second introduction hole 10c, and the third introduction hole 10b are through-holes each having a rectangular cross section, but the through-holes are not particularly limited thereto, and are, for example, through-holes having a circular cross section. It may be.

  As shown in FIG. 5, the cooling fluid lead-out hole 11 has a first lead-out hole 11a, a second lead-out hole 11c, and a third lead-out hole 11b, which are provided on each of the left and right sides. The first lead-out hole 11a leads out the cooling fluid 12 from the coil end 14a, which is closer to the fluid machine 1, of the two coil ends 14a and 14b to the exhaust port 9. The second lead-out hole 11c leads out the cooling fluid 12 to the exhaust port 9 from one of the two coil ends 14a and 14b, which is farther from the fluid machine 1. The third lead-out hole 11b leads out the cooling fluid 12 from the slit 13 to the exhaust port 9.

  The first lead-out hole 11a is arranged such that the central axis of the first lead-out hole 11a passes through the coil end 14a. The second lead-out hole 11c is arranged so that the central axis of the second lead-out hole 11c passes through the coil end 14b. The third lead-out hole 11b is arranged so that the central axis of the third lead-out hole 11b passes through the slit 13. Here, the first lead-out hole 11a, the second lead-out hole 11c, and the third lead-out hole 11b are through-holes each having a rectangular cross section, but the through-holes are not particularly limited thereto, and for example, a through-hole having a circular cross section. It may be.

  As shown in FIG. 1, FIG. 2, and FIG. 5, a cooling flow path 23 a through which the cooling fluid 12 passes is formed between the outer peripheral surface of the motor casing 5 and the inner peripheral surface of the cover 6. Further, the outer peripheral surface of the motor casing 5 is provided with irregularities 7.

  As shown in FIG. 7, the concavity and convexity 7 are configured here by convex portions 7a and concave portions 7b having a rectangular cross section extending in the circumferential direction of the motor casing 5 formed alternately in the axial direction. The outer diameter of the convex portion 7a of the unevenness 7 is almost the same as the inner diameter of the cover 6 (slightly smaller) here, but is not particularly limited to this, and may be smaller than the inner diameter of the cover 6 by a predetermined amount. Good. The shape of the unevenness 7 is not particularly limited as long as a plurality of portions having different heights (radial positions) are formed on the outer peripheral surface of the motor casing 5. For example, the convex portion 7a and the concave portion 7b may be formed in a ring shape or a spiral shape. The cross-sectional shape of the convex portion 7a and the concave portion 7b is not limited to the rectangular shape, and may be, for example, a trapezoidal shape or a triangular shape. Furthermore, the width dimension (axial dimension) of the convex portion 7a and the concave portion 7b can be changed as appropriate.

Next, the flow path of the cooling fluid 12 flowing in the motor 2 will be described.
As shown in FIG. 1, the cooling fluid 12 sucked from the intake port 8 of the cover 6 flows into the cooling flow path 23 a formed between the outer peripheral surface of the motor casing 5 and the inner peripheral surface of the cover 6. . In addition, the cooling fluid 12 sucked from the intake port 8 passes through the first introduction hole 10a and the second introduction hole 10c provided in the motor casing 5, and enters the arrangement region of the coil ends 14a and 14b in the motor casing 5. It flows into the formed cooling flow paths 23b and 23c. Further, the cooling fluid 12 sucked from the intake port 8 passes through the third introduction hole 10b provided in the motor casing 5 and flows into the cooling flow path 23d formed by the slit 13. A part of the cooling fluid 12 that has flowed into the cooling flow passages 23b and 23c flows through the cooling flow passage 23e formed in the gap between the rotor 3 and the stator 4 by the flow induced by the rotation of the rotor 3.

  As shown in FIG. 2, the cooling fluid 12 that has flowed into the cooling flow path 23 a flows through the gap between the unevenness 7 provided on the outer peripheral surface of the motor casing 5 and the cover 6, and the exhaust port provided in the cover 6. After passing through 9, the gas is exhausted to the outside of the motor 2. Further, the cooling fluid 12 that has flowed into the cooling flow path 23d passes through the third lead-out hole 11b provided in the motor casing 5 so as to communicate with the slit 13, and is led out to the outer peripheral side of the motor casing 5. Then, the cooling fluid 12 guided to the outer peripheral side of the motor casing 5 passes through the exhaust port 9 provided in the cover 6 and is exhausted to the outside of the motor 2.

  As shown in FIGS. 3 and 4, the cooling fluid 12 that has flowed into the cooling flow paths 23b and 23c has a first outlet hole 11a and a first outlet hole 11a that are provided so as to communicate with the coil ends 14a and 14b of the motor casing 5. It is led out to the outer peripheral side of the motor casing 5 through the two lead-out holes 11c. Then, the cooling fluid 12 guided to the outer peripheral side of the motor casing 5 passes through the exhaust port 9 provided in the cover 6 and is exhausted to the outside of the motor 2.

  As shown in FIG. 5, the cooling fluid 12 that has flowed into the cooling flow path 23e passes through the third outlet hole 11b, is led to the outer peripheral side of the motor casing 5, passes through the exhaust port 9 provided in the cover 6, and passes through the motor. 2 is exhausted to the outside.

  As described above, in the present embodiment, the motor 2 of the motor-integrated fluid machine 100 has the cover 6 provided on the outer peripheral side of the motor casing 5. The cover 6 includes an intake port 8 and an exhaust port 9, and the motor casing 5 includes a cooling fluid introduction hole 10 for introducing a cooling fluid 12 into the motor casing 5 from the intake port 8 and an inside of the motor casing 5. A cooling fluid lead-out hole 11 for leading the cooling fluid 12 to the exhaust port 9 is provided. A cooling flow path 23a through which the cooling fluid 12 passes is formed between the outer peripheral surface of the motor casing 5 and the inner peripheral surface of the cover 6, and the unevenness 7 is provided on the outer peripheral surface of the motor casing 5.

Here, if there is no unevenness 7 on the outer peripheral surface of the motor casing 5, since the pressure loss of the cooling fluid 12 flowing on the outer peripheral side of the motor casing 5 is small, the cooling fluid 12 mainly flows on the outer peripheral side of the motor casing 5. As a result, it is less likely to be introduced to the inner peripheral side of the motor casing 5.
On the other hand, in the present embodiment, the unevenness 7 on the outer peripheral surface of the motor casing 5 is adjusted so that the pressure loss of the cooling fluid 12 flowing on the outer peripheral side of the motor casing 5 increases. Thereby, the pressure loss of the cooling fluid 12 on the outer peripheral side and the inner peripheral side of the motor casing 5 can be made more uniform. Therefore, the cooling fluid 12 can be guided to the outer peripheral side and the inner peripheral side of the motor casing 5 in a well-balanced manner.
That is, according to this embodiment, the motor 2 in the motor-integrated fluid machine 100 can be cooled more efficiently.

  Further, the unevenness 7 provided on the outer peripheral surface of the motor casing 5 increases the heat dissipation area of the outer peripheral surface of the motor casing 5. Therefore, when the cooling fluid 12 guided to the outer peripheral side of the motor casing 5 flows through the cooling flow passage 23 a formed between the outer peripheral surface of the motor casing 5 and the inner peripheral surface of the cover 6, the motor casing 5 The heat radiation from the irregularities 7 on the outer peripheral surface of the motor 2 increases, and the cooling of the motor 2 can be promoted. From the viewpoint of promoting cooling by such heat dissipation, it is desirable that the irregularities 7 be fin-shaped.

  Further, in the present embodiment, the cooling fluid lead-out hole 11 leads the cooling fluid 12 from the coil end 14a to the exhaust port 9 and the first lead-out hole 11a that leads the cooling fluid 12 from the coil end 14b to the exhaust port 9. It has 2 lead-out holes 11c. With such a configuration, the cooling fluid 12 is exhausted through the coil ends 14a and 14b, so that the cooling of the coil ends 14a and 14b of the motor 2 which generate a relatively large amount of heat can be promoted.

  Further, in the present embodiment, the cooling fluid lead-out hole 11 has a third lead-out hole 11b for leading the cooling fluid 12 from the slit 13 to the exhaust port 9. With such a configuration, the cooling fluid 12 is exhausted through the slits 13 that divide the stator 4 and communicate with the outer peripheral surface of the rotor, so that cooling of the stator 4 and the rotor 3 can be promoted.

  Further, in the present embodiment, the cooling fluid introduction hole 10 is the first introduction hole 10 a for introducing the cooling fluid 12 from the intake port 8 to the coil end 14 a, and the second introduction hole 10 a for introducing the cooling fluid 12 from the intake port 8 to the coil end 14 b. It has an introduction hole 10c and a third introduction hole 10b for introducing the cooling fluid 12 from the intake port 8 to the slit 13.

With such a configuration, the cooling fluid 12 passes through the first introduction hole 10a and the second introduction hole 10c, which communicate with the coil ends 14a and 14b at both ends of the stator 4, respectively, to the inner peripheral side of the motor casing 5. Inflow. The cooling fluid 12 flows through the cooling flow paths 23b and 23c formed in the arrangement areas of the coil ends 14a and 14b, and is exhausted through the first outlet holes 11a and the second outlet holes 11c. A part of the cooling fluid 12 flowing through the cooling flow passages 23b and 23c flows through the cooling flow passage 23e formed in the gap between the rotor 3 and the stator 4 by the flow induced by the rotation of the rotor 3, 3 is exhausted through the outlet 11b. Thereby, the cooling fluid 12 can be introduced into the coil ends 14a and 14b, and the cooling of the coil ends 14a and 14b can be further promoted.
Further, the cooling fluid 12 passes through the third introduction hole 10b communicating with the slit 13 and flows into the inner peripheral side of the motor casing 5. The cooling fluid 12 flows through the cooling flow path 23d formed by the slit 13 provided in the stator 4, and is exhausted through the third outlet hole 11b. Thereby, the cooling fluid 12 can be introduced into the slits 13 provided in the stator 4, and the cooling of the stator 4 and the rotor 3 can be further promoted.

FIG. 8 is a diagram showing the cooling effect of the motor 2. In FIG. 8, the graph with “unevenness” shows the case of this embodiment, and the graph with “unevenness” shows the case of the configuration without the unevenness 7 of this embodiment (comparative example).
As shown in FIG. 8, it can be seen that the temperature of the motor 2 is lower in the case of the present embodiment adjusted to increase the pressure loss by providing the unevenness 7 than in the case of the comparative example. Therefore, in this embodiment, the motor 2 of the motor-integrated fluid machine 100 can be efficiently cooled with, for example, a small number of cooling fans.

  Further, in the present embodiment, a pair of intake ports 8 are provided at upper and lower positions on the cover 6 in which the circumferential positions are opposite to each other, and the exhaust ports are provided at the circumferential positions on the cover 6 as a pair. A pair is provided at the left and right positions between them. With such a configuration, more uniform cooling can be achieved at all circumferential positions of the motor 2 as compared with the case where the cooling fluid is sucked in from one intake port and exhausted from one exhaust port, for example.

(Second embodiment)
Next, with reference to FIGS. 9 to 10, the second embodiment of the present invention will be described focusing on the differences from the first embodiment described above, and the description of common points will be omitted as appropriate.
FIG. 9 is a schematic cross-sectional view showing the structure of the motor 2a of the motor-integrated fluid machine according to the second embodiment of the present invention. 10 is a sectional view taken along line HH of FIG.

  In the motor-integrated fluid machine, there is a quantity of heat that penetrates from the fluid machine 1 side to the motor 2 by heat conduction, so the temperature of the motor 2 on the fluid machine 1 side becomes high. Therefore, in the second embodiment, a configuration is adopted in which the cooling fluid 12 is introduced into the motor 2, particularly on the fluid machine 1 side.

  In the second embodiment, the cooling fluid introducing hole 10 includes the first introducing hole 10a for introducing the cooling fluid 12 from the intake port 8 to the coil end 14a closer to the fluid machine 1 of the two coil ends 14a, 14b, And the third introduction hole 10b for introducing the cooling fluid 12 from the intake port 8 to the slit 13 only. That is, the second introduction hole 10c (see FIG. 1) of the first embodiment is not provided. A cooling fan (not shown) that supplies the cooling fluid 12 into the motor 2 is provided on the exhaust port 9 side. The other structure is similar to that of the first embodiment described above.

  The flow path of the cooling fluid 12 flowing in the motor 2a in the second embodiment will be described with reference to FIGS. 9 to 10 and FIGS.

  As shown in FIG. 9, the cooling fluid 12 sucked from the intake port 8 flows into the cooling flow path 23a. Further, the cooling fluid 12 sucked from the intake port 8 passes through the first introduction hole 10a and flows into the cooling passage 23b formed in the motor casing 5 in the region where the coil end 14a is arranged. Further, the cooling fluid 12 sucked from the intake port 8 passes through the third introduction hole 10b and flows into the cooling flow path 23d formed by the slit 13. A part of the cooling fluid 12 that has flowed into the cooling flow passage 23b flows through the cooling flow passage 23e formed in the gap between the rotor 3 and the stator 4.

  As shown in FIG. 2, the cooling fluid 12 that has flowed into the cooling flow path 23 a flows through the gap between the unevenness 7 provided on the outer peripheral surface of the motor casing 5 and the cover 6, passes through the exhaust port 9, and passes through the motor 2 Is exhausted to the outside. Further, the cooling fluid 12 that has flowed into the cooling flow path 23d passes through the third outlet 11b, is led to the outer peripheral side of the motor casing 5, passes through the exhaust port 9, and is exhausted to the outside of the motor 2. As shown in FIG. 3, the cooling fluid 12 that has flowed into the cooling flow path 23b is led to the outer peripheral side of the motor casing 5 through the first lead-out hole 11a, passes through the exhaust port 9, and is exhausted to the outside of the motor 2. It As shown in FIG. 5, the cooling fluid 12 that has flowed into the cooling flow path 23e passes through the third outlet hole 11b, is led to the outer peripheral side of the motor casing 5, passes through the exhaust port 9, and is exhausted to the outside of the motor 2. It

  As shown in FIG. 10, the fluid staying in the cooling passage 23c is forcedly passed through the exhaust port 9 to the outside of the motor 2 by a cooling fan (not shown) provided on the exhaust port 9 side. Exhausted.

  According to such a second embodiment, the cooling fluid 12 sucked from the intake port 8 can be supplied only from the first introduction hole 10a and the third introduction hole 10b provided so as to communicate with the cooling flow paths 23b and 23d. , Flows into the inner peripheral side of the motor casing 5. Therefore, the flow rate of the cooling fluid 12 flowing through the fluid machine 1 side of the motor 2 is increased, and the cooling efficiency of the motor 2 on the fluid machine 1 side is improved.

(Third Embodiment)
Next, with reference to FIGS. 11 to 12, the third embodiment of the present invention will be described focusing on the points different from the first embodiment described above, and the description of common points will be omitted as appropriate.
FIG. 11 is a schematic sectional view showing the structure of the motor 2b of the motor-integrated fluid machine according to the third embodiment of the present invention. FIG. 12 is a sectional view taken along line I-I of FIG. 11.

  In the third embodiment, the cooling fluid introducing hole 10 is only the first introducing hole 10a for introducing the cooling fluid 12 from the intake port 8 to the coil end 14a of the two coil ends 14a, 14b closer to the fluid machine 1. It consists of That is, the second introduction hole 10c and the third introduction hole 10b (see FIG. 1) of the first embodiment are not provided. The other structure is similar to that of the first embodiment described above.

  The flow path of the cooling fluid 12 flowing in the motor 2b in the third embodiment will be described with reference to FIGS. 11 to 12 and FIGS.

  As shown in FIG. 11, the cooling fluid 12 sucked from the intake port 8 flows into the cooling flow path 23a. Further, the cooling fluid 12 sucked from the intake port 8 passes through the first introduction hole 10a and flows into the cooling passage 23b formed in the motor casing 5 in the region where the coil end 14a is arranged. A part of the cooling fluid 12 that has flowed into the cooling flow passage 23b flows through the cooling flow passage 23e formed in the gap between the rotor 3 and the stator 4.

  As shown in FIG. 12, the cooling fluid 12 that has flowed into the cooling passage 23 a flows through the gap between the unevenness 7 provided on the outer peripheral surface of the motor casing 5 and the cover 6, passes through the exhaust port 9, and passes through the motor 2 Is exhausted to the outside. The cooling fluid 12 staying in the cooling flow path 23d is forced to pass through the third outlet 11b by the cooling fan (not shown) provided on the exhaust port 9 side, and the outer peripheral side of the motor casing 5. Is discharged to the outside of the motor 2 through the exhaust port 9.

  As shown in FIG. 3, the cooling fluid 12 that has flowed into the cooling flow path 23b is led to the outer peripheral side of the motor casing 5 through the first lead-out hole 11a, passes through the exhaust port 9, and is exhausted to the outside of the motor 2. It As shown in FIG. 5, the cooling fluid 12 that has flowed into the cooling flow path 23e passes through the third outlet hole 11b, is led to the outer peripheral side of the motor casing 5, passes through the exhaust port 9, and is exhausted to the outside of the motor 2. It As shown in FIG. 10, the fluid staying in the cooling passage 23c is forcibly exhausted to the outside of the motor 2 through the exhaust port 9 by the cooling fan provided on the exhaust port 9 side.

  According to the third embodiment as described above, the cooling fluid 12 sucked from the intake port 8 is provided on the inner peripheral side of the motor casing 5 only from the first introduction hole 10a provided so as to communicate with the cooling flow path 23b. Flow into. Therefore, the flow rate of the cooling fluid 12 flowing through the fluid machine 1 side of the motor 2 is increased, and the cooling efficiency of the motor 2 on the fluid machine 1 side is improved. Further, the cooling of the bearing 22a on the fluid machine 1 side is promoted, and the cooling efficiency is improved.

  Although the present invention has been described above based on the embodiment, the present invention is not limited to the above-described embodiment and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. It is possible to add / delete / replace other configurations with respect to a part of the configurations of the above-described embodiments.

  For example, in the above-described embodiment, the motor 2 has a configuration in which the cooling fluid 12 is sucked into the pair of upper and lower intake ports 8 and is exhausted from the pair of left and right exhaust ports 9, but the present invention is not limited to this. Not something. For example, a configuration may be adopted in which a pair of intake ports 8 are provided on the left and right sides and a pair of exhaust ports 9 are provided on the top and bottom sides.

  Further, in the above-described embodiment, the cooling fluid lead-out hole 11 is provided so as to communicate with the coil ends 14a and 14b at both ends of the stator 4 and the slit 13, but the present invention is not limited to this. The cooling fluid lead-out hole 11 may be provided so as to communicate with only one coil end of the two coil ends 14a and 14b, only with the slit 13, or only with the slit 13 and one coil end. Good.

  Further, in the above-described embodiment, the stator 4 is divided in the axial direction by the slit 13, but the present invention is not limited to this, and the slit 13 may be omitted.

DESCRIPTION OF SYMBOLS 1 Fluid machine 2, 2a, 2b Motor 3 Rotor 4 Stator 5 Motor casing 6 Cover 6a Flat surface 7 Unevenness 7a Convex portion 7b Recessed portion 8 Inlet port 9 Exhaust port 10 Cooling fluid introduction hole 10a First introduction hole 10b Third introduction hole 10c 2nd introduction hole 11 Cooling fluid derivation hole 11a 1st derivation hole 11b 3rd derivation hole 11c 2nd derivation hole 12 Cooling fluid 13 Slit 14a, 14b Coil end 16 Blower casing 17 Impeller 18 Diffuser 19 Fluid suction port 22a, 22b Bearing 23a-23e Cooling channel 100 Motor integrated fluid machine

Claims (4)

Fluid machinery,
A motor for driving the fluid machine,
The motor is
A motor casing,
A cover provided on the outer peripheral side of the motor casing,
A rotatable rotor having one end connected to the fluid machine;
A stator arranged on the outer peripheral side of the rotor and fixed to the inner peripheral side of the motor casing,
The cover includes an intake port for sucking the cooling fluid, and an exhaust port for discharging the cooling fluid,
The motor casing includes a cooling fluid introduction hole for introducing the cooling fluid from the intake port into the motor casing, and a cooling fluid introduction hole for introducing the cooling fluid from inside the motor casing to the exhaust port,
Between the outer peripheral surface of the motor casing and the inner peripheral surface of the cover, a cooling flow path through which the cooling fluid passes is formed,
The outer peripheral surface of the motor casing is provided with irregularities ,
The stator is divided in the axial direction by a slit that communicates with the outer peripheral surface of the rotor, and has two coil ends formed at both ends,
The cooling fluid lead-out hole is a first lead-out hole for leading the cooling fluid to the exhaust port from the coil end of the two coil ends closer to the fluid machine, and the fluid of the two coil ends. A second lead-out hole for leading out the cooling fluid from the coil end farther from the machine to the exhaust port, and a third lead-out hole for leading out the cooling fluid from the slit to the exhaust port,
The cooling fluid introduction hole is a first introduction hole for introducing the cooling fluid from the intake port to one of the two coil ends closer to the fluid machine, and the cooling is provided from the intake port to the slit. A motor-integrated fluid machine comprising only a third introduction hole for introducing a fluid. Fluid machinery,
A motor for driving the fluid machine,
The motor is
A motor casing,
A cover provided on the outer peripheral side of the motor casing,
A rotatable rotor having one end connected to the fluid machine;
A stator arranged on the outer peripheral side of the rotor and fixed to the inner peripheral side of the motor casing,
The cover includes an intake port for sucking the cooling fluid, and an exhaust port for discharging the cooling fluid,
The motor casing includes a cooling fluid introducing hole for introducing the cooling fluid from the intake port into the motor casing, and a cooling fluid introducing hole for introducing the cooling fluid from inside the motor casing to the exhaust port,
Between the outer peripheral surface of the motor casing and the inner peripheral surface of the cover, a cooling flow path through which the cooling fluid passes is formed,
The outer peripheral surface of the motor casing is provided with irregularities ,
The stator has two coil ends formed at both ends,
The cooling fluid lead-out hole is a first lead-out hole for leading the cooling fluid to the exhaust port from one of the two coil ends that is closer to the fluid machine, and the one of the two coil ends. A second lead-out hole for leading the cooling fluid from the coil end farther from the fluid machine to the exhaust port,
The cooling fluid introducing hole is constituted only by a first introducing hole for introducing the cooling fluid from the intake port to one of the two coil ends closer to the fluid machine. Fluid machine with integrated motor. The stator is axially divided by a slit communicating with the outer peripheral surface of the rotor,
The motor-integrated fluid machine according to claim 2, wherein the cooling fluid lead-out hole has a third lead-out hole for leading the cooling fluid from the slit to the exhaust port. A pair of the intake ports are provided at positions where circumferential positions on the cover are opposite to each other, and a pair of exhaust ports are provided at a position where the circumferential position on the cover is between the pair of intake ports. The motor-integrated fluid machine according to any one of claims 1 to 3, wherein the fluid machine is integrated with the motor.

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