JP2021151112A - Rotary machine - Google Patents

Abstract

To provide a motor system which improves cooling efficiency of a rotor while cooling a stator by oil.SOLUTION: A rotary machine comprises: a first oil path 3b which is arranged in a region opposite to an oil reservoir section in housings (3, 55) and extends in a rotation axis direction of a rotor; and a second oil path 55a1 which communicates with an end of the other side out of an end of one side and an end of the other side in a rotation axis direction of the first oil path 3b, and while running toward the other side from the one side, running toward inside from outside in the radial direction. The first oil path 3b comprises a discharge port for discharging oil toward a stator on a wall of an oil reservoir section side. The second oil path 55a1 comprises an opening 55a2 on the end of the other side in the rotation axis direction. The opening 55a2 is positioned on the other side with respect to the end of the other side in the rotation axis direction of the rotor.SELECTED DRAWING: Figure 3

Description

The present invention relates to a rotating machine.

Conventionally, a rotary machine including a stator, a rotor arranged in a hollow of the stator, a housing for accommodating the stator and the rotor, and an oil pump is known.

For example, the motor generator as a rotating machine described in Patent Document 1 includes a stator, a rotor, a housing, and an oil pump. The housing of the motor generator has an oil pan, which is an oil storage unit for storing oil, and a discharge port for discharging oil via the oil pan and the oil pump toward a region of the stator opposite to the region facing the oil pan. And. The oil discharged from the discharge port adheres to the stator and the coil wound around the stator, and then drops onto the oil storage portion by gravity to cool the stator and the coil. The oil warmed by heat exchange with the stator and coil is cooled by a heat exchanger provided outside the housing in the process of reaching the suction port of the oil pump.

Japanese Unexamined Patent Publication No. 2008-92727

In a motor generator having such a configuration, it is difficult to satisfactorily cool the rotor arranged in the hollow of the stator because the oil adheres to the outer peripheral surface of the stator and drops into the oil storage portion.

The present invention has been made in view of the above background, and an object of the present invention is to provide a rotating machine capable of increasing the cooling efficiency of the rotor while cooling the stator with oil.

One aspect of the present invention includes a stator, a rotor that rotates about a rotation axis, a rotor that is arranged in the hollow of the stator, a housing that houses the stator and the rotor, and an oil pump. The housing discharges the oil storage unit that stores the oil and the oil that has passed through the oil storage unit and the oil pump toward the region of the stator that is opposite to the region facing the oil storage unit. A rotary machine including an outlet, wherein the housing is arranged in a region of the housing opposite to the oil storage portion, and a first oil passage extending in the rotation axis direction of the rotor and the first oil passage are provided. From the outside to the inside in the radial direction centered on the rotation axis, communicating with the other end of the one-side end and the other-side end in the rotation axis direction in The first oil passage is provided with a second oil passage to be directed, the first oil passage is provided with the discharge port on the wall on the oil storage portion side, and the second oil passage is provided with an opening at the other end in the rotation axis direction. The rotary machine is characterized in that the opening is located on the other side of the other end in the rotation axis direction of the rotor.

According to the present invention, there is an excellent effect that the cooling efficiency of the rotor can be increased while cooling the stator with oil.

It is sectional drawing which shows the stator and the rotor of the motor system which concerns on embodiment. It is a perspective view which shows the motor system. It is a vertical sectional view of the motor system. It is a perspective view which shows the motor housing, the oil cooler, and the electric oil pump of the motor system from the other side in the direction of the rotation axis. A cross-sectional view showing a fracture surface of the motor housing, the oil cooler, and the electric oil pump at the positions of the suction part and the discharge part in the rotation axis direction of the electric oil pump from one side in the rotation axis direction. be. It is a cross-sectional view which shows the fracture surface which broke the motor housing, the oil cooler, and the electric oil pump at the position of the outflow part in the rotation axis direction of the oil cooler from one side in the rotation axis direction. FIG. 3 is an enlarged vertical cross-sectional view showing a part of FIG. 3 in an enlarged manner. It is a perspective view which shows the inverter housing of the motor system from one side in the direction of the rotation axis.

Hereinafter, an embodiment of a motor system as a rotary machine system to which the present invention is applied will be described with reference to each figure.

FIG. 1 is a cross-sectional view showing a stator 5 and a rotor 7 of a motor system according to an embodiment. The stator 5 includes a cylindrical stator core 5a and a flat wire coil 5b that is a winding wound around the stator core 5a. The rotor 7 is arranged in the hollow of the stator core 5a, and includes a rotor core 7a and a plurality of permanent magnets 7b embedded in the rotor core 7a in a manner arranged in the circumferential direction about the rotation axis L of the rotor 7. In FIG. 1, hatching to be attached to the cross section of the flat wire coil 5b is omitted.

FIG. 2 is a perspective view showing the motor system 1 according to the embodiment. In FIG. 2, the motor cover, which will be described later, is omitted in order to visualize the internal configuration of the motor unit 2. The motor system 1 includes a motor unit 2 which is a rotary machine, an inverter 50, an electric oil pump 80, and an oil cooler 90.

The motor unit 2 includes a rotatable shaft 6. The shaft 6 as a rotating shaft member is rotatably supported around the rotating shaft line L indicated by the alternate long and short dash line in the drawing. The rotor 7 rotates integrally with the shaft 6. The extending direction of the rotation axis L is an example of the rotation axis direction in the present invention. The arrow A direction in FIG. 2 is an example of one side in the direction of the rotation axis. Further, the arrow B direction in FIG. 2 is an example of the other side in the rotation axis direction.

The motor unit 2 which is a rotating machine is composed of an IPM (Interior Permanent Magnet) motor, and includes a motor housing 3, a stator 5, a rotor 7, and the like in addition to the shaft 6. The motor housing 3 is provided with a cylindrical hollow. The above-mentioned hollow has openings at each end on the side in the direction of arrow A (one side in the direction of the rotation axis) and the end on the side in the direction of arrow B (the other side in the direction of the rotation axis). The opening at the end on the side of the arrow A is closed by a motor cover (not shown). Further, the opening at the end on the arrow B direction side is closed by the inverter housing 55 described later.

Hereinafter, the motor housing 3 and the inverter housing 55 are collectively referred to as housings (3, 55). Since one side of the inverter housing 55 in the direction of the rotation axis accommodates the ball bearing 8 and the like of the motor unit 2, it also serves as the motor housing.

The motor housing 3 accommodates the stator 5, the shaft 6, and the rotor 7 in a cylindrical hollow. The shaft 6 and the rotor 7 are arranged in the hollow of the cylindrical stator core 5a. However, one end of the shaft 6 in the rotation axis direction protrudes from one end of the stator core 5a in the longitudinal direction, and the other end of the shaft 6 in the rotation axis direction protrudes from the other end of the stator core 5a in the longitudinal direction.

One side of the motor housing 3 and the inverter housing 55 in the direction of the rotation axis is provided with an oil storage portion 3a for storing oil inside. The motor system 1 is designed on the premise that the oil storage unit 3a is arranged in a posture facing downward in the vertical direction (hereinafter referred to as a normal posture). Hereinafter, in the motor system 1 arranged in the normal posture, the lower portion in the vertical direction is referred to as the lower portion, and the upper portion is referred to as the upper portion with respect to the motor system 1, the motor housing 3, and the inverter housing 55 described later. ..

A certain amount of oil is contained in the internal space of the motor housing 3 and the internal space on one side of the inverter housing 55 in the direction of the rotation axis. In the motor system 1 arranged in the normal posture, the oil contained in the motor housing 3 and on one side of the inverter housing 55 in the rotation axis direction flows into the oil storage portion 3a due to gravity and is stored.

FIG. 3 is a vertical cross-sectional view of the motor system 1. Also in FIG. 3, the motor cover that closes the opening in the direction of arrow A in the motor housing 3 is not shown. Hereinafter, the circumferential direction centered on the rotation axis L is simply referred to as a circumferential direction. Further, the radial direction centered on the rotation axis L is simply referred to as the radial direction.

The shaft 6 is fitted into a through hole provided in the center of the rotor core 7a. Each of the arrow A direction side (one side) and the arrow B direction side (the other side) of the shaft 6 is rotatably supported by the ball bearing 8.

The motor unit 2 and the inverter 50 are adjacent to each other in the direction of the rotation axis. The inverter 50 supplies electric power of a three-phase power supply to the motor unit 2 at a frequency based on the command according to a command sent from a higher-level device such as an ECU (Engine Control Unit) of the vehicle. The inverter 50 including the inverter cover 51, the control board 52, and the inverter housing 55 is arranged on the opposite side (arrow B direction side) of the motor unit 2 in the direction of the rotation axis.

Each of the inverter cover 51 and the inverter housing 55 is a cast product having a hollow structure. The inverter housing 55 includes a partition wall 55a on one side in the direction of the rotation axis (the side in the direction of arrow A). The partition wall 55a closes the opening on the other side (arrow B direction side) of the motor housing 3 in the direction of the rotation axis, and separates the motor unit 2 from the inverter 50.

The control board 52 is arranged in the hollow on the other side of the inverter housing 55 in the direction of the rotation axis. The other side of the inverter housing 55 in the direction of the rotation axis is open toward the other side. This opening is closed by the inverter cover 51.

The motor housing 3 includes a first oil passage 3b for circulating oil. The first oil passage 3b is arranged in a region (upper portion) of the motor housing 3 that is radially outer of the stator 5 and opposite to the oil storage portion 3a, and is located in the rotation axis direction of the rotor 7. Extends to. In the present invention, the mode extending in the rotation axis direction includes a mode extending strictly along the rotation axis direction and a mode extending in a direction inclined to less than 45 [°] from the rotation axis direction.

The barrier 55a of the inverter housing 55 includes a second oil passage 55a1. The second oil passage 55a1 communicates with the other end of the one side (arrow A direction side) end and the other side (arrow B direction side) end in the rotation axis direction in the first oil passage 3b. From one side to the other, from the outside to the inside in the radial direction. The second oil passage 55a1 is provided with an opening 55a2 at the end on the other side (arrow B direction side) in the direction of the rotation axis. As shown in the figure, the opening 55a2 is located on the other side of the other end in the rotation axis direction of the rotor 7.

The motor housing 3 includes a first oil passage 3b for circulating oil. The first oil passage 3b is arranged in a region (upper portion) of the motor housing 3 opposite to the oil storage portion 3a, and extends in the rotation axis direction of the rotor 7. The first oil passage 3b is provided with a first discharge port 3b1 at one end in the rotation axis direction (arrow A direction side), and is provided with a second discharge port 3b1 at the other end in the rotation axis direction (arrow B direction side). It is provided with a discharge port 3b2.

The oil in the first oil passage 3b is discharged from the first discharge port 3b1 on one side (arrow A direction side) in the direction of the rotation axis. The discharged oil adheres to one end of the flat wire coil 5b of the stator 5 in the direction of the rotation axis to cool the flat wire coil 5b, and then drops into the oil storage portion 3a of the motor housing 3 by gravity. Further, the oil in the first oil passage 3b is discharged from the second discharge port 3b2 on the other side (arrow B direction side) in the direction of the rotation axis. The discharged oil adheres to the other end of the flat wire coil 5b of the stator 5 in the direction of the rotation axis to cool the flat wire coil 5b, and then drops into the oil storage portion 3a of the motor housing 3 by gravity. The stator core 7a is cooled by oil via the flat wire coil 7b.

The partition wall 55a of the inverter housing 55 includes a second oil passage 55a1. The second oil passage 55a1 communicates with the end of the first oil passage 3b on the other side (arrow B direction side) in the rotation axis direction, and goes from one side to the other while from the outside to the inside in the radial direction. Extend. The second oil passage 55a1 is provided with a third discharge port 55a2 at the end on the other side (arrow B direction side) in the direction of the rotation axis. As shown in the figure, the third discharge port 55a2 is located on the other side of the other end in the rotation axis direction of the rotor 7.

FIG. 4 is a perspective view showing the motor housing 3, the oil cooler 90, and the electric oil pump 80 from the other side in the direction of the rotation axis. A third oil passage 3e leading to the oil storage portion 3a is provided in the lower portion of the motor housing 3.

FIG. 5 shows a fracture surface of the motor housing 3, the oil cooler 90, and the electric oil pump 80 cut at the positions of the suction portion 80a and the discharge portion 80b in the rotation axis direction of the electric oil pump 80 on one side in the rotation axis direction. It is a cross-sectional view shown from. In FIG. 5, the internal structures of the oil cooler 90 and the electric oil pump 80 are not shown.

As shown in FIG. 5, the third oil passage 3e shown in FIG. 4 leads to the suction portion 80a of the electric oil pump 80. The motor housing 3 includes a fourth oil passage 3f that leads from the discharge portion 80b of the electric oil pump 80 to the inflow portion 90a of the oil cooler 90.

FIG. 6 is a cross-sectional view showing a fracture surface of the motor housing 3, the oil cooler 90, and the electric oil pump 80 at the position of the outflow portion 90b in the rotation axis direction of the oil cooler 90 from one side in the rotation axis direction. Is. As shown in the figure, the motor housing 3 includes a fifth oil passage 3g that leads from the outflow portion 90b of the oil cooler 90 to the central portion in the first oil passage 3b in the direction of the rotation axis.

The oil stored in the oil storage unit 3a is sucked into the third oil passage 3e through the opening of the third oil passage 3e shown in FIG. 4 by the suction force of the electric oil pump 80, and then is shown in FIG. It is sucked into the suction portion 80a of the electric oil pump 80. After that, the oil is discharged from the discharge portion 80b of the electric oil pump 80, moves in the fourth oil passage 3f from the lower part to the upper part of the motor housing 3, and enters the oil cooler 90 through the inflow portion 90a of the oil cooler 90. Inflow.

The oil cooler 90 includes a refrigerant passage (not shown) and an oil flow path adjacent to the refrigerant passage in the housing. Refrigerants such as coolant sent from the outside pass through the refrigerant path. The oil that has flowed into the oil cooler 90 is cooled by heat exchange with the refrigerant in the refrigerant path in the process of flowing through the oil flow path. The cooled oil flows out from the outflow portion 90b of the oil cooler 90 and flows into the fifth oil passage 3g, as shown in FIG. 6, and then from the fifth oil passage 3g in the direction of the rotation axis of the first oil passage 3b. It flows into the central part of.

The oil that has flowed into the central portion of the first oil passage 3b in the direction of the rotation axis is divided into oil that flows along the first path, oil that flows along the second path, and oil that flows along the third path. In FIG. 3, the oil flowing along the first path flows in the first oil passage 3b from the other side to one side (from the B side to the A side) along the rotation axis direction, and then the first discharge port. Discharge from 3b1. Then, the above-mentioned oil adheres to one end portion (end portion on the arrow A direction side) of the flat wire coil 5b of the stator 5 in the rotation axis direction. The oil flowing along the second path flows in the first oil passage 3b from one side to the other side (from A side to B side) along the rotation axis direction, and then is discharged from the second discharge port 3b2. .. Then, the above-mentioned oil adheres to the other end portion (end portion on the arrow B direction side) of the flat wire coil 5b of the stator 5 in the rotation axis direction. The third route will be described later.

FIG. 7 is an enlarged vertical sectional view showing a part of FIG. 3 in an enlarged manner. The oil flowing along the third path flows inside the first oil passage 3b from one side (arrow A direction side) in the rotation axis direction to the other side (arrow B direction side), and flows in the first oil passage 3b. It flows into the second oil passage 55a1 through the other end. Then, the oil flows in the second oil passage 55a1 in the direction from the outside to the inside in the radial direction while going from one side to the other side in the direction of the rotation axis. The oil that has moved to the other end of the second oil passage 55a1 in the rotation axis direction is discharged from the opening 55a2 of the second oil passage 55a1 and then on one side surface 55a3 of the barrier 55a as shown by an arrow C. Bounce off. The bounced oil flies from the outside to the inside in the radial direction due to gravity while moving from the other side in the rotation axis direction to one side, and adheres to the end surface on the other side in the rotation axis direction of the rotor 7.

According to the motor system 1 having such a configuration, oil is adhered to the upper portion of the outer peripheral surface of the stator 5, and oil is adhered to the other end of the rotor 7 in the direction of the rotation axis, thereby cooling the stator 5 while cooling the stator 5. The cooling efficiency of the rotor 7 can be increased.

As shown in FIG. 3, the barrier 55a faces the end face of the rotor 7 and the stator 5 on the other side (arrow B direction side) in the rotation axis direction. In the entire area of the barrier 55a, in the region inside the opening 55a2 of the second oil passage 55a1 in the radial direction, as shown in FIG. 7, one of the rotation axis directions is directed from the outside to the inside in the radial direction. A slope 55a4 approaching the side (the side in the direction of arrow A) is provided. The oil that did not bounce well toward one side in the rotation axis direction on the surface 55a3 of the barrier 55a moves on the slope 55a4 in the arrow D direction due to gravity, and the end surface on the other side in the rotation axis direction of the rotor 7. It approaches and adheres to.

According to such a configuration, the slope 55a4 can increase the amount of oil adhering to the end surface on the other side (arrow B direction side) of the rotor 7 in the rotation axis direction, and can further improve the cooling efficiency of the rotor 7. ..

FIG. 8 is a perspective view showing the inverter housing 55 from one side in the direction of the rotation axis. The barrier 55a of the inverter housing 55 has a slope side wall 55a5 that rises from both sides of the slope 55a4 in a direction orthogonal to the oil movement direction on the slope 55a4 toward one side in the rotation axis direction (arrow A direction side). Prepare

In such a configuration, the two slope side walls 55a5 prevent the oil moving on the slope 55a4 from spreading in the direction orthogonal to the moving direction, thereby preventing a decrease in the amount of oil adhering to the end surface of the rotor 7 due to the spread of the oil. do. This makes it possible to prevent a decrease in the cooling efficiency of the rotor 7 due to the spread of oil.

As shown in the figure, the distance between the two slope side walls 55a5 decreases from the outside to the inside in the radial direction, so that the capacity of the space between the two slope side walls 55a5 decreases from the outside to the inside in the radial direction. It gets smaller as it gets smaller. Since the slope 55a4 approaches one side from the other side in the rotation axis direction from the outside to the inside in the radial direction, the above-mentioned capacity decreases as it approaches the end surface of the rotor 7. According to this configuration, the oil level between the two slope side walls 55a5 is raised as the rotor 7 approaches the other end surface in the rotation axis direction, so that the oil can be easily adhered to the end surface of the rotor 7. The cooling efficiency of the rotor 7 can be further improved.

The portion of the barrier 55a provided with the slope 55a4 includes a groove 55a6 extending in the radial direction and recessing from one side (arrow A direction side) to the other side (arrow B direction side) in the direction of the rotation axis. A part of the oil that moves on the slope 55a4 due to gravity enters the groove 55a6, moves substantially along the direction of gravity, and adheres to the shaft (6 in FIG. 3). Therefore, according to the motor system 1, the groove 55a6 promotes the adhesion of oil to the shaft, and the cooling efficiency of the shaft can be improved.

As described with reference to FIGS. 3 to 7, in the motor housing 3, the first discharge port 3b1, the second discharge port 3b2, and the second discharge port 3b2 pass from the oil storage unit 3a through the electric oil pump 80 and the oil cooler 90. 3 All the oil flow paths leading to the discharge port 55a2 are provided. According to the motor system 1 having such a configuration, the oil can be circulated without providing a pipe for forming a circulation path for circulating the oil in the oil cooler 90 and in the motor unit 2 outside the motor. The productivity of the motor system 1 can be improved.

Although an example in which the present invention is applied to the motor unit 2 as a rotating machine has been described, the present invention may be applied to a generator (dynamo) as a rotating machine.

The present invention is not limited to the above-described embodiment, and a configuration different from the embodiment may be adopted as long as the configuration of the present invention can be applied. The present invention exerts a peculiar action and effect for each aspect described below.

[First aspect]
The first aspect is a stator (for example, a stator 5), a rotor (for example, a rotor 7) arranged in a hollow of the stator in a mode of rotating around a rotation axis (for example, a rotation axis L), the stator, and the above. A housing (for example, a housing (3, 55)) for accommodating a rotor and an oil pump (for example, an electric oil pump 80) are provided, and the housing includes an oil storage unit (for example, an oil storage unit 3a) for storing oil and the above. A rotating machine (for example, a motor unit 2) provided with a discharge port for discharging oil via an oil storage unit and the oil pump toward a region of the stator opposite to the region facing the oil storage unit. The housing is arranged in a region of the housing opposite to the oil storage portion, and has a first oil passage (for example, a first oil passage 3b) extending in the direction of the rotation axis of the rotor and the first oil. Of the one-sided end and the other-side end in the direction of the rotation axis in the road, the other end is communicated with the other end, and while going from one side to the other side, from the outside to the inside in the radial direction about the rotation axis. A second oil passage (for example, a second oil passage 55a1) is provided, the first oil passage is provided with a discharge port (for example, a discharge port 3b1) on a wall on the oil storage portion side, and the second oil passage is provided. However, the rotary machine is provided with an opening (for example, opening 55a2) at the other end in the rotation axis direction, and the opening is located on the other side of the other end in the rotation axis direction of the rotor. Is.

In the first aspect, the oil discharged from the discharge port adheres to the upper part of the outer peripheral surface of the stator and then moves on the outer peripheral surface by gravity to cool the stator. On the other hand, the oil in the second oil passage moves to the other end in the rotation axis direction of the second oil passage, is discharged from the opening 55a2, and then is discharged from the opening 55a2 on one side in the rotation axis direction on the wall of the housing (for example, the barrier 55a). Bounces on the surface of. The bounced oil flies from the outside to the inside in the radial direction by gravity while moving from the other side in the rotation axis direction to one side, and adheres to the end face on the other side in the rotation axis direction of the rotor. Due to this adhesion, the oil described above cools the rotor. Therefore, according to the first aspect, it is possible to improve the cooling efficiency of the rotor while cooling the stator.

[Second aspect]
The second aspect comprises the configuration of the first aspect, wherein the housing has a diameter larger than the opening in the entire area of the wall (for example, the barrier 55a) facing the other end surface of the rotor or stator in the direction of the rotation axis. The rotary machine is characterized in that a region inside the direction is provided with a slope (for example, a slope 55a4) that approaches one side in the direction of the rotation axis as it goes from the outside to the inside in the radial direction.

According to such a configuration, the slope can increase the amount of oil adhering to the other end surface of the rotor in the direction of the rotation axis, and the cooling efficiency of the rotor can be further improved.

[Third aspect]
The third aspect is the configuration of the second aspect, and the side wall of the slope (for example, the side wall of the slope) that rises from both sides of the slope in the direction orthogonal to the oil movement direction on the slope toward one side in the direction of the rotation axis. It is a rotating machine characterized by having 55a5).

According to the third aspect, it is possible to prevent a decrease in the cooling efficiency of the rotor due to the spread of the oil by preventing the spread of the oil moving on the slope in the direction orthogonal to the moving direction by the two slope side walls. can.

[Fourth aspect]
A fourth aspect is a rotating machine having the configuration of the third aspect, wherein the distance between the two side walls of the slope decreases from the outside to the inside in the radial direction.

According to the fourth aspect, the liquid level of the oil between the two side walls of the slope is raised as it approaches the end face on the other side in the rotation axis direction of the rotor to facilitate adhesion to the end face of the rotor. The cooling efficiency can be further improved.

[Fifth aspect]
A fifth aspect includes any of the configurations of the second to fourth aspects and a shaft (for example, a shaft 6) fitted in a through hole extending in the direction of the rotation axis provided at the position of the rotation axis of the rotor. The rotary machine is characterized in that a portion of the wall having the slope is provided with a groove (for example, a groove 55a6) extending in the radial direction and recessed from one side to the other side in the direction of the rotation axis.

According to such a configuration, the groove can promote the adhesion of oil to the shaft, and the cooling efficiency of the shaft can be improved.

1: Motor system, 2: Motor part (rotary machine), 3: Motor housing (part of housing), 3a: Oil storage part, 3b: 1st oil passage, 3b1: 1st discharge port, 3b2: 2nd Discharge port, 3e: 3rd oil passage, 3f: 4th oil passage, 3g: 5th oil passage, 5: stator, 5a: stator core, 5b: flat wire coil (winding), 6: shaft, 7: rotor, 7a: Rotor core, 7b: Permanent magnet, 55: Inverter housing (part of housing), 55a: Barrier (wall), 55a1: Second oil passage, 55a2: Opening, 55a3: Surface, 55a4: Slope, 55a5: Slope side wall , 55a6: Groove, 80: Electric oil pump (oil pump), 80a: Suction part, 80b: Discharge part, 90: Oil cooler, 90a: Inflow part, 90b: Outflow part

Claims (5)

A stator, a rotor arranged in a hollow of the stator in a mode of rotating about a rotation axis, a housing for accommodating the stator and the rotor, and an oil pump are provided.
The housing discharges the oil storage unit that stores the oil, and the oil that has passed through the oil storage unit and the oil pump toward the region of the stator that is opposite to the region facing the oil storage unit. It is a rotating machine equipped with a discharge port.
The housing is arranged in a region of the housing opposite to the oil storage portion, and has a first oil passage extending in the rotation axis direction of the rotor and one end of the first oil passage in the rotation axis direction. A second oil passage that communicates with the other end and goes from one side to the other while extending from the outside to the inside in the radial direction about the rotation axis.
The first oil passage is provided with the discharge port on the wall on the oil storage portion side.
The second oil passage has an opening at the other end in the direction of the rotation axis.
A rotating machine characterized in that the opening is located on the other side of the other end in the rotation axis direction of the rotor. As the housing moves from the outside to the inside in the radial direction in the region inside the rotor or the stator in the radial direction from the opening in the entire area of the wall facing the other end surface in the rotation axis direction of the rotor or the stator. The rotary machine according to claim 1, further comprising a slope approaching one side in the direction of the rotation axis. The rotary machine according to claim 2, further comprising slope side walls that rise from both sides of the slope in a direction orthogonal to the oil moving direction on the slope toward one side in the direction of the rotation axis. The rotary machine according to claim 3, wherein the distance between the two side walls of the slope decreases from the outside to the inside in the radial direction. A shaft provided at a position of the rotation axis of the rotor and fitted into a through hole extending in the direction of the rotation axis is provided.
2. Rotating machine.

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