CN217607587U - Rotor of oil-cooled motor, oil-cooled motor and vehicle - Google Patents

Abstract

The utility model discloses a rotor, oil-cooled motor and vehicle of oil-cooled motor, the rotor includes: the permanent magnet cooling device comprises a rotor core, and a first permanent magnet and a second permanent magnet which are arranged on the rotor core, wherein the remanence of the first permanent magnet is larger than that of the second permanent magnet, the rotor core is provided with at least one first oil cooling channel which extends along the axial direction, and the distance between the first oil cooling channel and the first permanent magnet is smaller than that between the first oil cooling channel and the second permanent magnet. According to the utility model discloses the rotor of oil-cooled motor is close to the higher first permanent magnet setting of calorific capacity through the cold passageway of first oil, and the radiating effect that can rational distribution coolant oil makes coolant oil and first permanent magnet heat transfer more abundant, is favorable to full play heat-sinking capability.

Description

Rotor of oil-cooled motor, oil-cooled motor and vehicle

Technical Field

The utility model relates to the technical field of electric machines, more specifically relates to a rotor, oil cooling motor and vehicle of oil cooling motor.

Background

In the related art, in the heat dissipation system of the rotor, the oil cooling channel enters from the middle of the rotor core, the stroke is short, the cooling oil is thrown out of the oil cooling channel without sufficient heat exchange, waste is caused, and the optimal heat dissipation performance cannot be exerted. And the oil cooling channel and the heat source permanent magnet are unreasonably arranged, so that the optimal heat dissipation performance cannot be exerted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a rotor of oil-cooled motor, heat dispersion has been improved to the rotor.

The utility model discloses still provide an oil-cooled motor of having above-mentioned rotor.

The utility model discloses still provide a vehicle that has above-mentioned oil-cooled motor.

According to the utility model discloses rotor of oil-cooled motor, include: the permanent magnet cooling device comprises a rotor core, and a first permanent magnet and a second permanent magnet which are arranged on the rotor core, wherein the remanence of the first permanent magnet is larger than that of the second permanent magnet, the rotor core is provided with at least one first oil cooling channel which extends along the axial direction, and the distance between the first oil cooling channel and the first permanent magnet is smaller than that between the first oil cooling channel and the second permanent magnet.

According to the utility model discloses the rotor of oil-cooled motor is close to the higher first permanent magnet setting of calorific capacity through the cold passageway of first oil, and the radiating effect that can rational distribution coolant oil makes coolant oil and first permanent magnet heat transfer more abundant, is favorable to full play heat-sinking capability.

In addition, according to the utility model discloses the rotor of the oil-cooled motor of above-mentioned embodiment can also have following additional technical characterstic:

according to some embodiments of the utility model, first permanent magnet is followed rotor core's radial extension, first oil cooling passageway is located first permanent magnet is followed one side of rotor core circumference, first oil cooling passageway is followed radial length of rotor core is less than or equal to the radial length of first permanent magnet.

According to some embodiments of the invention, the first oil cooling channel is provided between two adjacent first permanent magnets.

According to the utility model discloses a some embodiments, rotor core is equipped with and is used for the installation the first mounting groove of first permanent magnet, the central point of first oil cooling passageway with the interval of first mounting groove is 10mm ~ 14mm.

According to some embodiments of the invention, at least a part of the wall surface of the first oil cooling channel is a concave-convex surface in a cross section perpendicular to the axial direction of the rotor.

According to some embodiments of the utility model, the corrugated surface is the wave.

According to some embodiments of the utility model, first oil cooling passageway includes two first walls relative to each other and two second walls relative to each other, at the perpendicular to on the axial cross-section of rotor, first wall is the plane, the second wall is the wave, the wave includes a plurality ofly to keeping away from the sunken circular arc section of first oil cooling passageway direction, planar length with the ratio of the radius of circular arc section is 1 ~ 1.2.

According to some embodiments of the present invention, in the radial direction of the rotor core, two the interval of the first wall and the ratio of the radius of the arc segment are 4 ~ 5.

According to some embodiments of the utility model, the first oil cooling passageway is close to the wall of first permanent magnet does the corrugated surface.

According to some embodiments of the invention, the rotor core is further provided with at least one axially extending second oil cooling channel, the second oil cooling channel being radially spaced apart from the first oil cooling channel.

According to some embodiments of the utility model, the second oil cooling passageway is located the inboard of first oil cooling passageway, just the second oil cooling passageway is located the inboard of permanent magnet on the rotor core.

According to some embodiments of the invention, the rotor further comprises: the rotor shaft penetrates through the rotor iron core and is provided with an oil inlet channel; first end plate and second end plate, first end plate with the second end plate is located respectively rotor core's axial both sides, first end plate is equipped with the intercommunication passageway, the intercommunication passageway intercommunication first oil cold passageway with oil feed passageway and intercommunication second oil cold passageway with the oil feed passageway, the second end plate be equipped with first oil cold passageway with the passageway that produces oil of second oil cold passageway intercommunication.

According to some embodiments of the present invention, the first oil cooling channel and the second oil cooling channel adjacent to each other are communicated with the same oil outlet channel; or the adjacent first oil cooling channel and the second oil cooling channel are respectively communicated with the two oil outlet channels.

According to the utility model discloses oil-cooled motor includes according to the utility model discloses oil-cooled motor's rotor.

According to the utility model discloses the vehicle includes according to the utility model discloses oil-cooled motor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial schematic structural view of an oil-cooled motor according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial fitting structure of a rotor shaft and a rotor core of a rotor according to an embodiment of the present invention;

fig. 3 is a schematic view of a partially fitted structure of a first end plate of a rotor and a rotor core according to an embodiment of the present invention, wherein permanent magnets are not shown;

fig. 4 is a schematic view of a partially mated structure of a second end plate of a rotor and a rotor core according to some embodiments of the present invention;

fig. 5 is a schematic view of a partially mated structure of a second end plate of a rotor and a rotor core according to further embodiments of the present invention;

fig. 6a and 6b are oil passage two-phase distribution diagrams of rotors according to embodiments of the present invention and comparative examples, respectively;

fig. 7a and 7b are temperature field comparison graphs of rotors of an embodiment and a comparative example of the present invention, respectively;

fig. 8a and 8b are temperature comparison graphs of permanent magnets of rotors of examples and comparative examples of the present invention, respectively;

fig. 9a and 9b are comparative graphs of the temperature of the rotor core of the rotors of the embodiment and the comparative example of the present invention, respectively;

fig. 10 is a schematic diagram of a vehicle according to an embodiment of the present invention.

Reference numerals:

an oil-cooled electric machine 1000; a vehicle 2000;

a rotor 100; a stator 200;

a rotor core 10; a first oil cooling channel 11; a first wall 111; a second wall 112; a circular arc segment 113; a second oil-cooled channel 12; a mounting groove 13; a first mounting groove 131; a second mounting groove 132;

a rotor shaft 30; an oil inlet passage 31;

a first end plate 40; a communication passage 41;

a second end plate 50; an oil outlet passage 51.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and "a plurality" means two or more, and the first feature may be "on" or "under" the second feature, and may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween, and the first feature being "on", "above" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is higher in level than the second feature.

The rotor 100 of the oil-cooled motor 1000 according to an embodiment of the present invention, and the oil-cooled motor 1000 having the same are described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a rotor 100 of an oil-cooled motor 1000 according to an embodiment of the present invention may include: rotor core 10 is equipped with at least one along axially extended first oil cooling passageway 11 on rotor core 10, and cooling oil can flow along first oil cooling passageway 11 to carry out the heat transfer with rotor core 10, and then cool down the permanent magnet of installation on rotor core 10, realize the radiating effect.

For example, in some embodiments, a plurality of permanent magnet groups, each including at least one permanent magnet, are mounted on rotor core 10, and are arranged along the circumferential direction of rotor core 10. First oil cooling passageway 11 is a plurality of, and a plurality of first oil cooling passageways 11 are arranged along rotor core 10's circumference to improve the heat dissipation homogeneity of a plurality of permanent magnet groups. In some specific embodiments, the number of the first oil-cooling channels 11 is equal to that of the permanent magnet groups, and each first oil-cooling channel 11 may be disposed between two adjacent permanent magnet groups, so as to reduce a distance between the first oil-cooling channel 11 and the permanent magnet, improve a heat dissipation effect on the permanent magnet, and reduce an influence of the first oil-cooling channel 11 on the magnetic circuit; or each first oil cooling channel 11 is arranged on the radial inner side of the corresponding permanent magnet group, so as to reduce the influence of the first oil cooling channel 11 on the magnetic circuit and reduce the influence of the first oil cooling channel 11 on the structural strength of the rotor core 10.

In some embodiments, as shown in fig. 2, rotor 100 includes a first permanent magnet and a second permanent magnet mounted to rotor core 10, the first permanent magnet having a larger remanence than the second permanent magnet, and the first permanent magnet generating a larger amount of heat relative to the second permanent magnet during operation, forming a larger permanent magnet as a heat generating source. And the interval between the first oil cooling channel 11 and the first permanent magnet is smaller than the interval between the first oil cooling channel 11 and the second permanent magnet, so that the first oil cooling channel 11 is closer to the first permanent magnet with larger heat productivity, the heat dissipation effect of the first permanent magnet and the second permanent magnet can be reasonably distributed, and the heat dissipation capability is furthest exerted.

In some embodiments, the first oil-cooling channel 11 is located between two adjacent first permanent magnets, so that the first oil-cooling channel 11 is located between the rare-earth permanent magnets generating more heat and closer to the larger heat generating source. For example, in the embodiment shown in fig. 2, the first permanent magnet is made of a rare earth permanent magnet such as neodymium iron boron, the second permanent magnet is made of ferrite, and the first oil cooling channel 11 is located between two adjacent magnetic poles, that is, between two first permanent magnets.

Furthermore, in the embodiment of the utility model, adopt mixed permanent magnet mode through first permanent magnet and second permanent magnet, can guarantee under the condition of motor output performance, reduction in production cost, and be favorable to avoiding the high-speed stress that centrifugal force caused to electric motor rotor when moving of motor too big, avoid the motor to damage.

According to the utility model discloses the rotor 100 of the cold motor 1000 of oil is close to the higher first permanent magnet setting of calorific capacity through the cold passageway 11 of first oil, can the radiating effect of rational distribution coolant oil, makes coolant oil more abundant with first permanent magnet heat transfer, is favorable to full play heat-sinking capability.

In some embodiments of the present invention, as shown in fig. 2, the first permanent magnet extends along the radial direction of the rotor core 10, the first oil cooling channel 11 is disposed on one side of the first permanent magnet along the circumferential direction of the rotor core 10, and the length of the first oil cooling channel 11 along the radial direction of the rotor core 10 is smaller than or equal to the radial length of the first permanent magnet. In other words, the first oil cooling passage 11 extends no more than the length of the first permanent magnet to reduce the influence of the structural strength of the rotor core 10 due to the slotting.

In some embodiments in which permanent magnets are mounted on the rotor core 10, as shown in fig. 2, a first oil-cooling passage 11 may be provided between two adjacent permanent magnets. For example, as shown in fig. 2, between two adjacent first permanent magnets. Therefore, the first oil cooling channel 11 is closer to the two permanent magnets, so that the heat exchange efficiency of the two heating sources can be improved, and the heat dissipation capacity can be exerted to the maximum extent.

In some embodiments of the present invention, as shown in fig. 2, the rotor core 10 is provided with a first mounting groove 131 for mounting the first permanent magnet, and the minimum distance between the center point of the first oil cooling channel 11 and the first mounting groove 131 is 10mm to 14mm. Through research, in above-mentioned interval within range, the influence to electromagnetic properties is minimum, and the wholeness can be better, and has guaranteed heat exchange efficiency and radiating effect, has effectively balanced the relation between electromagnetic properties and the heat dissipation, and 11 positions of first oil cooling passageways set up more rationally.

In some embodiments, as shown in fig. 2, the rotor core 10 is provided with mounting grooves 13 for mounting the permanent magnets, and the mounting grooves 13 are plural and include first mounting grooves 131 and second mounting grooves 132. The first mounting groove 131 is used to mount a first permanent magnet, and the second mounting groove 132 is used to mount a second permanent magnet. The corresponding same magnetic pole includes two first permanent magnets spaced apart in the circumferential direction and a second permanent magnet located between the two first permanent magnets, the first permanent magnets and the corresponding first mounting grooves 131 extend in the radial direction of the rotor core 10, and the second permanent magnets and the corresponding second mounting grooves 132 extend perpendicular to the d-axis. The first oil cooling channel 11 is arranged between two adjacent magnetic poles, namely, between two first mounting grooves 131, and the minimum distance between the center point of the first oil cooling channel 11 and the first mounting groove 131 is 10mm to 14mm.

According to some embodiments of the present invention, as shown in fig. 2, at least a portion of the wall surface of the first oil cooling channel 11 is concave-convex surface in the cross section perpendicular to the axial direction of the rotor 100. The concave-convex surface can increase the surface area of the first oil cooling channel 11, so that the radiating contact area is larger, and meanwhile, the concave-convex surface can also enhance the turbulence degree of cooling oil in the first oil cooling channel 11 to a certain extent, thereby being beneficial to heat radiation.

For example, in some embodiments, the concave-convex surface is undulating, as shown in fig. 2. In other words, the concave-convex surface is formed by connecting a plurality of concave cambered surfaces and convex cambered surfaces in a smooth transition mode, the heat dissipation area is increased better, the turbulence degree of cooling oil is better and violent, and the heat dissipation effect is improved more remarkably.

According to the utility model discloses the rotor 100 of oil-cooled motor 1000 of some embodiments, at least partial wall through first oil-cooled passageway 11 is concave-convex face, can make radiating area of contact bigger, can strengthen the torrent degree of coolant oil simultaneously, makes the coolant oil heat transfer more abundant, is favorable to improving the radiating effect.

According to some embodiments of the present invention, as shown in fig. 2, the first oil cooling passage 11 includes two first walls 111 opposite to each other and two second walls 112 opposite to each other. In a cross section perpendicular to the axial direction of the rotor 100, the first wall 111 is a plane, i.e., extends along a straight line, and the second wall 112 is a wave-shaped, i.e., a wave-shaped concave-convex surface. The wave includes a plurality of arc sections 113 to keeping away from the sunken of first oil cooling passageway 11 direction to increase first oil cooling passageway 11's through-flow area, improve the radiating effect.

For example, the wave shape shown in fig. 2 includes 3 circular arc segments 113, and two adjacent circular arc segments 113 may be directly connected to each other or connected to each other through a structure such as an inverted concave arc. In the specific example shown in fig. 2, the wave shape includes three arc segments 113 recessed away from the first oil cooling channel 11 and two arcs recessed near the first oil cooling channel 11, centers of the three arc segments 113 are collinear in the radial direction of the rotor core 10, two arcs are collinear in the radial direction of the rotor core 10, and the two lines are parallel to each other.

Wherein, the ratio of the length of the plane to the radius of the circular arc section 113 is 1-1.2, namely W/R is more than or equal to 1 and less than or equal to 1.2. In the above proportion range, the turbulence at the two first wall surfaces 111 in the first cooling oil passage can be retained to the greatest extent, so that more cooling oil flows into the first cooling oil passage in unit time, and more heat is dissipated.

For example, in the example shown in fig. 2, two first wall surfaces 111 are spaced apart in the radial direction of the rotor core 10, each first wall surface 111 extends perpendicular to the radial direction, and the length of the plane is the dimension of the first wall surface 111 in the radial direction.

In some embodiments, as shown with continued reference to FIG. 2, the ratio of the distance between the two first walls 111 to the radius of the arc segment 113 in the radial direction of the rotor core 10 is 4-5, i.e., 4L/R5. So that the first oil cooling channel 11 is oversized and the influence of structural strength caused by grooving is reduced.

For example, in the example shown in fig. 2, the first oil-cooling passage 11 has a dimension L extending in the radial direction of the rotor core 10.

In some embodiments in which permanent magnets are mounted on rotor core 10, as shown in fig. 2, the wall surface of first oil-cooling channel 11 close to the adjacent permanent magnet is concave-convex, for example, the wall surface close to the first permanent magnet is concave-convex. So that the larger area of the first oil cooling channel 11 is close to the heating source, thereby exerting the heat dissipation capability to the maximum extent and improving the heat dissipation effect.

In some embodiments, as shown in fig. 2, the permanent magnet includes a first permanent magnet extending in a radial direction of the rotor core 10, the first oil cooling channel 11 is disposed on one side of the first permanent magnet along a circumferential direction of the rotor core 10, the first oil cooling channel 11 includes two first wall surfaces 111 and two second wall surfaces 112, and the second wall surfaces 112 are closer to the first permanent magnet than the first wall surfaces 111, so that the second wall surfaces 112 are concave-convex structures, such as a wave shape, to improve heat dissipation efficiency of the first permanent magnet of the heat generation source.

In addition, in some embodiments in which the first oil cooling channel 11 is adjacent to two permanent magnets, two wall surfaces of the first oil cooling channel 11 adjacent to the two permanent magnets respectively may both adopt a concave-convex surface structure, so as to improve the heat dissipation effect on the two permanent magnets, for example, both the two second wall surfaces 112 of the first oil cooling channel 11 may be wavy.

According to some embodiments of the present invention, as shown in fig. 2, rotor core 10 may further be provided with at least one second oil cooling channel 12 extending along the axial direction, and second oil cooling channel 12 is radially spaced apart from first oil cooling channel 11 to form a multi-channel heat dissipation structure, so as to improve the heat dissipation effect and uniformity of different regions of rotor core 10.

And, second oil cooling passageway 12 is closer to rotor core 10's axis, makes rotor core 10 go up to have more spaces to be used for setting up second oil cooling passageway 12, and second oil cooling passageway 12 is kept away from the stator rotor contact surface moreover, is more difficult for appearing stress concentration and the great problem of stress, and the fluting area of second oil cooling passageway 12 can suitably increase in order to improve the radiating effect.

In some embodiments, the first oil cooling channel 11 and the second oil cooling channel 12 may be disposed in a one-to-one correspondence, for example, both disposed between two adjacent permanent magnet sets, so as to reduce the influence on the electromagnetic performance.

In some embodiments, the second oil-cooling passage 12 is provided inside the first oil-cooling passage 11, and the second oil-cooling passage 12 is located inside the permanent magnets on the rotor core 10. First oil cooling passageway 11 adopts the concave-convex surface structure to for second oil cooling passageway 12, first oil cooling passageway 11 is closer to the permanent magnet, and the flow distribution ratio of whole oil circuit can be optimized to the concave-convex surface structure especially wave structure, makes more cooling oil flow direction first oil cooling passageway 11, and the area that gives out heat more that flows to promptly, and holistic heat dispersion is better.

According to some embodiments of the present invention, as shown in fig. 1-5, the rotor 100 further comprises: a rotor shaft 30, a first end plate 40, and a second end plate 50 (e.g., a flux barrier). Wherein, rotor shaft 30 wears to locate rotor core 10 and has oil feed passageway 31, and the axial both sides of rotor core 10 are located respectively to first end plate 40 and second end plate 50. The first end plate 40 is provided with a communication passage 41, the communication passage 41 communicates the first oil cooling passage 11 and the oil inlet passage 31, and the communication passage 41 communicates the second oil cooling passage 12 and the oil inlet passage 31. The second end plate 50 is provided with an oil outlet passage 51 communicating with the first oil-cooling passage 11 and the second oil-cooling passage 12.

Thereby, the cooling oil enters the communication channel 41 of the first end plate 40 from the oil inlet channel 31 of the rotor shaft 30, then enters the first oil cooling channel 11 and the second oil cooling channel 12, respectively, cools the rotor core 10 and the permanent magnet, and then flows to the oil outlet channel 51 of the second end plate 50, and the cooling oil is thrown out of the oil outlet channel 51 and thrown to the winding of the stator 200 for cooling. The first oil cooling channel 11 and the second oil cooling channel 12 realize oil inlet and outlet through the first end plate 40 and the second end plate 50, and heat dissipation of the first end plate 40 and the second end plate 50 is facilitated.

In some embodiments, as shown in fig. 3, the outlet section of the oil inlet channel 31 of the rotor shaft 30 extends along the radial direction of the rotor shaft 30, the communication channel 41 on the first end plate 40 is an elongated channel, and the elongated channel and the outlet section of the oil inlet channel 31 extend in the same direction, so that the flow resistance of the cooling oil in the oil inlet channel 31 is smaller. And the elongated channel comprises a first section and a second section, wherein the first section is at least partially overlapped with the axial projection of the first oil cooling channel 11, and the second end is at least partially overlapped with the axial projection of the second oil cooling channel 12, for example, the axial projections of the first section and the first oil cooling channel 11 can be completely the same, so as to increase the flow rate of the cooling oil flowing to the first oil cooling channel 11 and improve the overall heat dissipation effect.

In some embodiments, as shown in fig. 4, the adjacent first oil-cooling channel 11 and the second oil-cooling channel 12 may be communicated with the same oil outlet channel 51, that is, the cooling oil in the first oil-cooling channel 11 and the second oil-cooling channel 12 converges and then flows out through the same oil outlet channel 51, so as to simplify the structure of the second end plate 50, reduce the amount of cooling oil thrown by the rotor 100 onto the winding of the stator 200, improve the oil distribution of the rotor 100, and improve the heat dissipation effect of the rotor 100.

Of course, in other embodiments, as shown in fig. 5, the adjacent first oil cooling channel 11 and the second oil cooling channel 12 may also be respectively communicated with the two oil outlet channels 51. That is, the cooling oil in the first oil-cooled passage 11 and the second oil-cooled passage 12 does not merge at the outlet, and each flows out through a separate outlet, which can also achieve the heat radiation effect of the rotor 100.

The following describes advantageous effects according to embodiments of the present invention in conjunction with a comparative example and embodiments of the present invention.

Example (b): be equipped with first oil cooling passageway 11 between two neodymium iron boron permanent magnets (being first permanent magnet) along radial extension, two second wallfaces 112 of first oil cooling passageway 11 are the wave, and the inboard of first oil cooling passageway 11 is equipped with second oil cooling passageway 12.

Comparative example: the difference from the embodiment is that the first oil cooling channel 11 is changed into three cylindrical channels arranged along the radial direction.

Fig. 6 to 9 show the two-phase distribution of oil passages, the temperature field comparison, the permanent magnet temperature comparison and the rotor core temperature comparison of the examples and the comparative examples, respectively, and the comparative structures are shown in table 1:

TABLE 1

As can be seen from the above simulation comparison structure, by setting the second wall surface 112 of the first oil cooling channel 11 to be wave-shaped, the heat dissipation coefficients of the rotor core 10 and the permanent magnet are both greatly improved, the heat dissipation effects of the rotor core 10 and the permanent magnet are effectively reduced, and the overall performance of the rotor 100 is improved.

As shown in fig. 1, the oil-cooled motor 1000 according to the embodiment of the present invention includes the rotor 100 of the oil-cooled motor 1000 according to the embodiment of the present invention. Because according to the utility model discloses the rotor 100 of the cold motor 1000 of oil has above-mentioned profitable technological effect, consequently according to the utility model discloses the cold motor 1000 of oil is close to the higher first permanent magnet setting of calorific capacity through first oil cold passageway 11, and the radiating effect of cooling oil can the rational distribution, makes cooling oil and first permanent magnet heat transfer more abundant, is favorable to full play heat-sinking capability.

As shown in fig. 10, a vehicle 2000 according to an embodiment of the present invention includes an oil-cooled motor 1000 according to an embodiment of the present invention. Because according to the utility model discloses oil-cooled motor 1000 has above-mentioned profitable technological effect, consequently according to the utility model discloses vehicle 2000 is close to the higher first permanent magnet setting of calorific capacity through first oil cooling passageway 11, and the radiating effect that can the rational distribution coolant oil makes coolant oil and first permanent magnet heat transfer more abundant, is favorable to full play heat-sinking capability.

Here, the vehicle 2000 may be a new energy vehicle, in some embodiments, the new energy vehicle may be an electric only vehicle in which the oil-cooled motor 1000 serves as a main driving force, and in other embodiments, the new energy vehicle may also be a hybrid vehicle in which an internal combustion engine and the oil-cooled motor 1000 serve as a main driving force at the same time. As for the oil-cooled motor 1000 that supplies driving power to the new energy vehicle mentioned in the above embodiment, a power battery, a hydrogen fuel cell, or the like may be used to supply power to the oil-cooled motor 1000, and this is not particularly limited. It should be noted that, here, the structures of the new energy vehicle and the like are only exemplified and not limiting the protection scope of the present invention.

Other configurations and operations of the oil-cooled motor 1000 and the vehicle 2000 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "specific embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. The rotor of the oil-cooled motor is characterized by comprising a rotor core, and a first permanent magnet and a second permanent magnet which are arranged on the rotor core, wherein the remanence of the first permanent magnet is larger than that of the second permanent magnet, the rotor core is provided with at least one first oil-cooled channel which extends along the axial direction, and the distance between the first oil-cooled channel and the first permanent magnet is smaller than that between the first oil-cooled channel and the second permanent magnet.

2. The rotor of the oil-cooled motor according to claim 1, wherein the first permanent magnet extends in a radial direction of the rotor core, the first oil-cooled channel is provided on one side of the first permanent magnet in a circumferential direction of the rotor core, and a length of the first oil-cooled channel in the radial direction of the rotor core is smaller than or equal to a length of the first permanent magnet in the radial direction.

3. The rotor of an oil-cooled motor according to claim 1, wherein the first oil-cooled passage is provided between adjacent two of the first permanent magnets.

4. The rotor of an oil-cooled motor according to claim 3, wherein the rotor core is provided with a first mounting groove for mounting the first permanent magnet, and a distance between a center point of the first oil-cooled passage and the first mounting groove is 10-14 mm.

5. The rotor of an oil-cooled motor according to claim 1, wherein at least a part of a wall surface of the first oil-cooled passage is concave-convex in a cross section perpendicular to an axial direction of the rotor.

6. The rotor of an oil-cooled electric machine of claim 5, wherein the relief surface is wavy.

7. The rotor of an oil-cooled motor according to claim 6, wherein the first oil-cooled channel includes two first wall surfaces opposite to each other and two second wall surfaces opposite to each other, in a cross section perpendicular to an axial direction of the rotor, the first wall surfaces are flat surfaces, the second wall surfaces are wave-shaped, the wave-shaped shape includes a plurality of arc sections recessed in a direction away from the first oil-cooled channel, and a ratio of a length of the flat surfaces to a radius of the arc sections is 1 to 1.2.

8. The rotor of an oil-cooled motor according to claim 7, wherein a ratio of a distance between the two first wall surfaces to a radius of the circular arc segment in a radial direction of the rotor core is 4 to 5.

9. The rotor of an oil-cooled motor according to claim 5, wherein a wall surface of the first oil-cooled passage adjacent to the first permanent magnet is the concave-convex surface.

10. A rotor for an oil cooled electric machine according to any of claims 1-9, wherein the rotor core is further provided with at least one second axially extending oil cooling channel radially spaced from the first oil cooling channel.

11. The rotor of an oil-cooled electric machine of claim 10, wherein the second oil-cooled passage is provided inside the first oil-cooled passage, and the second oil-cooled passage is located inside a permanent magnet on the rotor core.

12. The rotor of an oil-cooled electric machine of claim 10, further comprising:

the rotor shaft penetrates through the rotor iron core and is provided with an oil inlet channel;

first end plate and second end plate, first end plate with the second end plate is located respectively rotor core's axial both sides, first end plate is equipped with the intercommunication passageway, the intercommunication passageway intercommunication first oil cold passageway with oil feed passageway and intercommunication second oil cold passageway with the oil feed passageway, the second end plate be equipped with first oil cold passageway with the passageway that produces oil of second oil cold passageway intercommunication.

13. The rotor of an oil-cooled electric machine of claim 12, wherein the first and second adjacent oil-cooled passages communicate with the same oil outlet passage;

or the adjacent first oil cooling channel and the second oil cooling channel are respectively communicated with the two oil outlet channels.

14. An oil-cooled electric machine, characterized in that it comprises a rotor of an oil-cooled electric machine according to any one of claims 1-13.

15. A vehicle characterized by comprising an oil-cooled electric machine according to claim 14.

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