Rotor and oil-cooled motor

Abstract

The invention provides a rotor and an oil cooling motor, relates to the technical field of motors, and can improve the heat dissipation effect of the rotor. The rotor comprises a rotor core, a first end plate and a second end plate. The rotor iron core is provided with at least two oil path channels which penetrate through the rotor iron core along the axial direction of the rotor iron core; the first end plate and the second end plate are arranged at two axial ends of the rotor core; an oil inlet channel is formed in the first end plate; an oil outlet channel is formed in the first end plate or the second end plate; the second end plate is provided with at least one first oil collecting groove; each first oil collecting groove is opposite to and directly communicated with the two oil way channels in the axial direction of the rotor iron core, and each first oil collecting groove and the two corresponding oil way channels define an oil way; in the same oil way, one oil way channel is a first channel, and the other oil way channel is a second channel; the flow directions of fluid in the first channel and the second channel are opposite, and the oil way communicates with the oil inlet channel through the first channel and communicates with the oil outlet channel through the second channel.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a rotor and oil-cooled motor. Background Technology

[0002] During motor operation, the permanent magnets drive the rotor core and shaft to rotate under the influence of electromagnetic induction. During this process, the outer surface of the rotor rubs against the surrounding air, generating a large amount of heat (especially at the locations where the permanent magnets are embedded), causing the rotor temperature to rise. If the temperature exceeds the allowable limit, it will directly affect the motor's operational reliability, and in severe cases, may even cause the permanent magnets to demagnetize, resulting in irreversible damage to the motor. Therefore, effective heat dissipation measures are crucial to ensuring stable motor operation.

[0003] Currently, oil cooling technology is one of the most widely used heat dissipation solutions in the industry, but its actual heat dissipation effect on the rotor is still not ideal. Summary of the Invention

[0004] In view of this, this application provides a rotor that can improve the heat dissipation effect of the rotor. In addition, this application also provides an oil-cooled motor including the above-described rotor.

[0005] To achieve the above objectives, this application provides the following technical solution: In a first aspect, this application provides a rotor, including a rotor core, a first end plate and a second end plate; the rotor core has an oil passage extending through it along its own axial direction, and there are at least two oil passages; the first end plate and the second end plate are disposed at both ends of the rotor core along its axial direction. An oil inlet channel is formed on the first end plate; an oil outlet channel is formed on the first end plate or the second end plate; at least one first oil collecting groove is provided on the end face of the second end plate facing the rotor core; each first oil collecting groove is directly connected to two oil passages in the axial direction of the rotor core, and each first oil collecting groove and the corresponding two oil passages define an oil passage. In the two oil passages of the same oil circuit, one oil passage is called the first passage and the other oil passage is called the second passage; the fluid flows in opposite directions in the first and second passages. The oil circuit is connected to the oil inlet passage through the first passage and to the oil outlet passage through the second passage.

[0006] This configuration, by directly connecting each first oil collection tank to two oil passages flowing in opposite directions, forms a complete oil circuit. Furthermore, the oil passages are connected to the inlet channel via the first channel and to the outlet channel via the second channel, ensuring all oil passages share the same inlet and outlet channels. This achieves internal cooling of the rotor core while ensuring a consistent total driving pressure difference across all oil passages in the system. This allows the flow distribution of cooling oil across the various oil passages to automatically become more balanced, resulting in more uniform heat dissipation and more stable cooling performance for the rotor core. Consequently, the heat dissipation efficiency of the rotor core is effectively improved, thus enhancing its cooling effect.

[0007] In addition, the oil circuit can extend the residence time of the cooling oil, thereby further improving the heat dissipation efficiency of the rotor core.

[0008] In some possible embodiments of the first aspect, there are multiple oil passages; the end face of the first end plate facing the rotor core has at least one second oil collection groove; each second oil collection groove corresponds to two oil passages; in the corresponding second oil collection groove and two oil passages, the first channel of one oil passage and the second channel of the other oil passage are directly connected to the second oil collection groove in the axial direction of the rotor core, so that the fluid flows through the multiple oil passages in sequence.

[0009] In some possible embodiments of the first aspect, an oil outlet channel is formed on the second end plate; the rotor core also has a discharge channel that extends through the rotor core along its own axial direction; an oil outlet groove is provided on the end face of the first end plate facing the rotor core; in the flow path of the fluid, the second channel of the downstream oil passage is directly connected to the oil outlet groove, the discharge channel is directly connected to the oil outlet groove, and the discharge channel is directly connected to the oil outlet channel.

[0010] In some possible implementations of the first aspect, multiple oil passages are distributed sequentially in the circumferential direction of the rotor core and are connected sequentially.

[0011] In some possible implementations of the first aspect, each oil passage includes a first oil passage and a magnet mounting passage; The first oil passage and the magnet installation passage are separated in the circumferential direction of the rotor, and magnets are installed in the magnet installation passage.

[0012] In some possible embodiments of the first aspect, the rotor core includes a plurality of sub-rotor cores, which are stacked in the axial direction of the rotor. Each sub-rotor core is provided with a plurality of oil passage holes and a plurality of magnetic slots arranged at intervals along the circumference of the rotor. The oil passage holes and magnetic slots penetrate the end faces of the corresponding two ends of the sub-rotor core in the axial direction. Oil passage holes on any two adjacent sub-rotor cores are arranged facing each other; each first oil passage includes one oil passage hole for each sub-rotor core. The magnet slots on any two adjacent sub-rotor cores are arranged facing each other; each magnet mounting channel includes one magnet slot on each sub-rotor core.

[0013] In some possible implementations of the first aspect, a magnetic groove is provided between any two adjacent oil passages in the circumferential direction of the rotor.

[0014] In some possible implementations of the first aspect, the first oil collecting groove is an arc-shaped groove that extends along the circumferential direction of the rotor.

[0015] In some possible embodiments of the first aspect, the rotor further includes a shaft, and the rotor core, the first end plate and the second end plate are all fixedly sleeved on the shaft; the end face of one axial end of the shaft has an oil inlet and the end face of the other axial end of the shaft has an oil outlet. The shaft has an internal cavity, and a partition is provided inside the cavity to divide the cavity into a first cavity and a second cavity. The oil inlet is connected to the first cavity, and the oil outlet is connected to the second cavity. The outer circumferential surface of the rotating shaft has an oil-throwing hole that communicates with the first cavity, and the oil inlet channel is directly connected to the oil-throwing hole; The outer circumferential surface of the shaft also has an oil return hole that communicates with the second cavity, and the oil outlet channel is directly connected to the oil return hole.

[0016] In some possible embodiments of the first aspect, the first cavity and the second cavity are arranged axially on the shaft, the first cavity is adjacent to the oil inlet relative to the second cavity, the first end plate is adjacent to the oil inlet relative to the second end plate, and the oil outlet is located on the second end plate.

[0017] In some possible embodiments of the first aspect, the oil inlet channel has a first inlet port and a first outlet port, the first inlet port being located on the inner circumferential surface of the first end plate, the first outlet port being located on the end face of the first end plate facing the rotor core, and the oil passage being connected to the first outlet port through the first channel.

[0018] In some possible embodiments of the first aspect, the oil outlet channel is located on the second end plate, the oil outlet channel includes a second inlet port and a second outlet port, the second inlet port is located on the end face of the second end plate facing the rotor core and communicates with the oil passage, and the second outlet port is located on the inner circumferential surface of the second end plate.

[0019] Secondly, this application provides an oil-cooled motor, including the rotor described in any of the technical solutions in the first aspect.

[0020] Since the oil-cooled motor includes the rotor described in any of the embodiments of the first aspect above, both can solve the same technical problem and achieve the same beneficial effects. Therefore, the beneficial effects of the oil-cooled motor provided in the embodiments of this application can be referred to the beneficial effects of the rotor, and will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 The diagram shows the structure of a rotor provided for some embodiments of this application.

[0023] Figure 2 for Figure 1 The diagram shows the structure of the first end plate in the rotor.

[0024] Figure 3 for Figure 1 The diagram shows the structure of the second end plate in the rotor.

[0025] Figure 4 for Figure 1 The diagram shows the structure of the rotor core in the rotor.

[0026] Figure 5 for Figure 1 The diagram shows the rotor from another perspective.

[0027] Figure 6 for Figure 5 The diagram shows the rotor shaft.

[0028] Figure 7 for Figure 5 A cross-sectional schematic diagram of the shaft shown.

[0029] Explanation of reference numerals in the attached figures: 100. Rotor. 1. Rotor core. 11. Oil passage. 11a. First passage. 11b. Second passage. 111. Magnet mounting passage. 112. First oil passage. 12. Discharge passage. 13. Sub-rotor core. 131. Oil passage hole. 132. Magnet slot. 2. First end plate. 21. Oil inlet passage. 211. First inlet port. 212. First discharge port. 22. Second oil collection trough. 23. Oil outlet trough. 3. Second end plate. 31. Oil outlet passage. 311. Second inlet port. 312. Second discharge port. 32. First oil collection trough. 4. Shaft. 41. Oil inlet. 42. Oil outlet. 43. Cavity. 431. First cavity. 432. Second cavity. 44. Separator. 45. Oil slinger hole. 46. ​​Oil return hole. Detailed Implementation

[0030] This application provides a rotor and an oil-cooled motor.

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] As described in the background section above, during motor operation, the permanent magnets drive the rotor core and shaft to rotate under the influence of electromagnetic induction. During this process, the outer surface of the rotor rubs against the surrounding air, generating a large amount of heat (especially at the locations where the permanent magnets are embedded), causing the rotor temperature to rise. If the temperature exceeds the allowable limit, it will directly affect the motor's operational reliability, and in severe cases, may even cause demagnetization of the permanent magnets, resulting in irreversible damage to the motor. Therefore, effective heat dissipation measures are crucial to ensuring stable motor operation.

[0033] Currently, oil cooling technology is one of the most widely used heat dissipation solutions in the industry, but its actual heat dissipation effect on the rotor is still not ideal. Specifically, oil cooling solutions in related technologies typically employ a structure with multiple oil channels arranged axially along the rotor core, with cooling oil injected from one end and discharged from the other. Due to differences in oil pressure among the multiple channels, some channels have more cooling oil than others. This uneven distribution of cooling oil leads to poor heat dissipation in localized areas of the rotor, resulting in heat concentration and thus affecting the overall heat dissipation efficiency.

[0034] For the above technical issues, please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a rotor 100 provided in some embodiments of this application. Embodiments of this application provide a rotor 100, including a rotor core 1, a first end plate 2, and a second end plate 3.

[0035] The rotor core 1 has an oil passage 11 that runs through it along its axial direction, and there are at least two oil passages 11. The first end plate 2 and the second end plate 3 are located at the two axial ends of the rotor core 1.

[0036] Please continue reading. Figure 1 and combined Figure 2 and Figure 3 ,in, Figure 2 for Figure 1 The schematic diagram of the structure of the first end plate 2 in the rotor 100 is shown. Figure 3 for Figure 1 The schematic diagram shows the structure of the second end plate 3 in the rotor 100.

[0037] An oil inlet channel 21 is formed on the first end plate 2. An oil outlet channel 31 is formed on the second end plate 3. The end face of the second end plate 3 facing the rotor core 1 has at least one first oil collecting groove 32.

[0038] Each first oil collection groove 32 and the two oil passages 11 are directly connected and aligned in the axial direction of the rotor core 1. Each first oil collection groove 32 and the corresponding two oil passages 11 define an oil passage.

[0039] In the two oil passages 11 of the same oil circuit, one oil passage 11 is the first passage 11a, and the other oil passage 11 is the second passage 11b. The fluid flows in opposite directions in the first passage 11a and the second passage 11b. The oil circuit is connected to the oil inlet passage 21 through the first passage 11a, and to the oil outlet passage 31 through the second passage 11b.

[0040] Of course, this application is not limited to this. In other embodiments, the oil outlet channel 31 described above may also be formed on the first end plate 2.

[0041] This configuration, by directly connecting each first oil collection tank 32 to two oil passages 11 with opposite flow directions, forms a complete oil passage. Furthermore, the oil passages are connected to the inlet channel 21 via the first channel 11a and to the outlet channel 31 via the second channel 11b, ensuring that all oil passages share the same inlet channel 21 and outlet channel 31. This achieves internal cooling of the rotor core 1 while ensuring that the total driving pressure difference across all oil passages remains consistent, automatically balancing the flow distribution of cooling oil among the passages. This results in more uniform heat dissipation and more stable cooling performance for the rotor core 1. Consequently, the heat dissipation efficiency of the rotor core 1 is effectively improved, thus enhancing its cooling effect.

[0042] In addition, the oil circuit can extend the residence time of the cooling oil, thereby further improving the heat dissipation efficiency of the rotor core 1.

[0043] Please see Figure 1 In some embodiments, there are multiple oil passages. The end face of the first end plate 2 facing the rotor core 1 has at least one second oil collecting groove 22. Each second oil collecting groove 22 corresponds to two oil passages. In the corresponding second oil collecting groove 22 and two oil passages, the first channel 11a of one oil passage and the second channel 11b of the other oil passage are directly connected to the second oil collecting groove 22 in the axial direction of the rotor core 1, so that the fluid flows through multiple oil passages in sequence.

[0044] It is worth noting that at this point, the phrase “the oil circuit is connected to the oil inlet channel 21 through the first channel 11a and to the oil outlet channel 31 through the second channel 11b” mentioned earlier means that the first channel 11a of the oil circuit located at the upstream end is connected to the oil inlet channel 21, and the second channel 11b of the oil circuit located at the downstream end is connected to the oil outlet channel 31.

[0045] In this way, the cooling oil can flow through multiple oil passages sequentially, thereby extending the flow path of the cooling oil inside the rotor core 1 and increasing the effective heat exchange area between the cooling oil and the rotor core 1. This effectively improves the overall heat dissipation efficiency of the rotor 100.

[0046] Of course, this application is not limited to this. In other embodiments, there may be only one oil passage. In this case, the oil outlet channel 31 is formed on the first end plate 2. The oil passage is directly connected to the oil inlet channel 21 through its own first channel 11a, and directly connected to the oil outlet channel 31 through its own second channel 11b.

[0047] Please see Figure 1 In some embodiments, multiple oil passages are distributed sequentially along the circumference of the rotor core 1 and are connected sequentially. This layout is more reasonable and allows for the placement of more oil passages within a limited space, thereby improving the overall heat dissipation capacity of the rotor 100.

[0048] Please see Figure 4 , Figure 4 for Figure 1 The diagram shows the structure of the rotor core 1 in the rotor 100. In some embodiments, each oil passage 11 includes a first oil passage 112 and a magnet mounting passage 111. The first oil passage 112 and the magnet mounting passage 111 are spaced apart in the circumferential direction of the rotor 100. Exemplarily, the first oil passage 112 and the magnet mounting passage 111 may, but are not limited to, be evenly distributed in the circumferential direction of the rotor 100.

[0049] A magnet (not shown in the figure) is installed in the magnet mounting channel 111. It is understood that, in this case, the magnet needs to have a gap with at least one side wall of the magnet mounting channel 111.

[0050] This allows for more efficient use of the space occupied by the magnet installation channel 111, thereby effectively improving the internal space utilization efficiency of the rotor core 1.

[0051] Of course, this application is not limited to this. In other embodiments, each oil passage 11 includes only the first oil passage 112. In this case, in the axial direction of the rotor core 1, the magnet mounting passage 111 may be directly opposite the second oil collecting groove 22 and / or the first oil collecting groove 32, or it may not be directly opposite the second oil collecting groove 22 and / or the first oil collecting groove 32. When the magnet mounting passage 111 is directly opposite the second oil collecting groove 22 and / or the first oil collecting groove 32 in the axial direction of the rotor core 1, the magnets need to fill the magnet mounting passage 111. In still some embodiments, each oil passage 11 may also include only the magnet mounting passage 111.

[0052] Please see Figure 4 and combined Figure 5 ,in, Figure 5 for Figure 1 The diagram shows a schematic representation of the rotor 100 from another perspective. In some embodiments, the rotor core 1 includes a plurality of sub-rotor cores 13, which are stacked in the axial direction of the rotor 100. Each sub-rotor core 13 is provided with a plurality of oil passage holes 131 and a plurality of magnetic slots 132 arranged at intervals along the circumference of the rotor 100. The oil passage holes 131 and the magnetic slots 132 all penetrate the end faces of their corresponding sub-rotor core 13 at both ends in the axial direction.

[0053] Oil passage holes 131 on any two adjacent sub-rotor cores 13 are arranged facing each other. Each first oil passage 112 includes one oil passage hole 131 for each sub-rotor core 13.

[0054] The magnet slots 132 on any two adjacent sub-rotor cores 13 are arranged facing each other. Each magnet mounting channel 111 includes one magnet slot 132 on each sub-rotor core 13.

[0055] This configuration, by setting the rotor core 1 as multiple sub-rotor cores 13 stacked axially, and machining oil passage holes 131 and magnet slots 132 on each sub-rotor core 13, allows for precise axial alignment of the oil passage holes 131 and magnet slots 132 of each sub-rotor core 13 during assembly. This forms the first oil passage 112 and magnet mounting passage 111 that run through the entire rotor core 1. In this way, the manufacturing challenge of the complex internal passages running the entire length of the rotor core 1 can be broken down into a process of machining simple through holes on each sub-rotor core 13, effectively reducing the overall machining difficulty and manufacturing cost of the rotor core 1.

[0056] Please see Figure 4 In some embodiments, a magnet groove 132 is provided between any two adjacent oil passages 131 in the circumferential direction of the rotor 100. This facilitates the alternating and uniform arrangement of the cooling oil passages and magnet mounting channels 111 in the circumferential direction of the rotor core 1, thereby promoting more uniform circumferential heat dissipation of the rotor core 1.

[0057] Of course, this application is not limited to this. In other embodiments, a portion of two adjacent oil passage holes 131 may have a magnetic groove 132 between them, while another portion of two adjacent oil passage holes 131 may not have a magnetic groove 132 between them.

[0058] Please see Figure 5 In some embodiments, the specific connection method between the oil outlet channel 31 formed in the second end plate 3 and the second channel 11b described above is as follows: The rotor core 1 also has a discharge channel 12 that extends through the rotor core 1 along its own axial direction. For example, the discharge channel 12 can be formed by an oil passage hole 131 on each of the sub-rotor cores 13 as described above, or by a magnet slot 132 on each of the sub-rotor cores 13 as described above, or by a combination of the oil passage hole 131 and the magnet slot 132 on each of the sub-rotor cores 13 as described above.

[0059] The first end plate 2 has an oil outlet groove 23 on its end face facing the rotor core 1. In the fluid flow path, the second channel 11b of the downstream oil passage is directly connected to the oil outlet groove 23, the discharge channel 12 is directly connected to the oil outlet groove 23, and the discharge channel 12 is directly connected to the oil outlet channel 31.

[0060] With this configuration, the oil outlet channel 31 can be formed on the second end plate 3 by setting the oil outlet groove 23 and the discharge channel 12. This makes the layout of the oil circuit more reasonable and helps to simplify the structure of the rotor 100.

[0061] Please see Figure 5In some embodiments, the first oil collecting groove 32 is an arc-shaped groove that extends along the circumferential direction of the rotor 100. This facilitates the first oil collecting groove 32 to be directly aligned with and connected to both oil passages 11 in the axial direction of the rotor 100. Of course, this application is not limited to this. In other embodiments, the first oil collecting groove 32 can also be a straight groove.

[0062] It is understandable that the shape of the second oil collection tank 22 can be designed with reference to the shape of the first oil collection tank 32, and will not be elaborated here.

[0063] Please see Figure 5 In some embodiments, the rotor 100 further includes a shaft 4, and the rotor core 1, the first end plate 2, and the second end plate 3 are all fixedly sleeved on the shaft 4. Please continue reading. Figure 6 and combined Figure 7 ,in, Figure 6 for Figure 5 A schematic diagram of the rotating shaft 4 in the rotor 100 shown. Figure 7 for Figure 5 The diagram shows a cross-sectional view of the rotating shaft 4. One axial end face of the rotating shaft 4 has an oil inlet 41, and the other axial end face has an oil outlet 42. The rotating shaft 4 has an interior cavity 43, within which a partition 44 is provided to divide the cavity 43 into a first cavity 431 and a second cavity 432. Exemplarily, the partition 44 may be, but is not limited to, a partition plate integrally formed with the rotating shaft 4.

[0064] The oil inlet 41 is connected to the first cavity 431, and the oil outlet 42 is connected to the second cavity 432. The outer circumferential surface of the rotating shaft 4 has an oil-throwing hole 45 connected to the first cavity 431, and the oil inlet channel 21 is directly connected to the oil-throwing hole 45. The outer circumferential surface of the rotating shaft 4 also has an oil return hole 46 connected to the second cavity 432, and the oil outlet channel 31 is directly connected to the oil return hole 46.

[0065] In this way, the cavity 43 inside the rotating shaft 4 can be divided into a first cavity 431 and a second cavity 432 that are not connected to each other by the partition 44. This ensures that the oil inlet and return processes of the rotating shaft 4 do not interfere with each other. As a result, the supply pressure of the oil inlet channel 21 can be effectively stabilized, so that the cooling oil has a more stable flow capability when entering the oil passage 11 of the rotor core 1, which is conducive to improving the heat dissipation effect of the rotor core 1.

[0066] In addition, since the inflow and outflow paths of the cooling oil are integrated inside the shaft 4, it is also beneficial to reduce the radial and axial dimensions of the rotor 100, making the structure of the rotor 100 more compact.

[0067] Please see Figure 7In some embodiments, the first cavity 431 and the second cavity 432 are arranged axially on the rotating shaft 4, with the first cavity 431 being closer to the oil inlet 41 than the second cavity 432, and the first end plate 2 being closer to the oil inlet 41 than the second end plate 3. This layout is more reasonable and helps to simplify the internal structure of the rotating shaft 4, thereby effectively reducing the manufacturing difficulty and production cost of the rotating shaft 4.

[0068] Of course, this application is not limited to this. In other embodiments, the first cavity 431 and the second cavity 432 may also be arranged in the radial direction of the rotating shaft 4. For example, the first cavity 431 and the second cavity 432 each occupy half of the space of the cavity 43 in the radial direction. In this case, the position of the oil outlet channel 31 can be adjusted according to the oil circuit layout, for example, it can be located on the second end plate 3 or on the first end plate 2.

[0069] Please return to the reference. Figure 2 In some embodiments, the oil inlet channel 21 has a first inlet port 211 and a first outlet port 212. The first inlet port 211 is located on the inner circumferential surface of the first end plate 2, and the first outlet port 212 is located on the end face of the first end plate 2 facing the rotor core 1. The oil passage communicates with the first outlet port 212 through the first channel 11a. Exemplarily, the first outlet port 212 may be, but is not limited to, an arc-shaped opening.

[0070] In this way, the cooling oil can flow directly from the oil slinger hole 45 of the rotating shaft 4 into the first inlet port 211 and flow through the inside of the oil inlet channel 21 to the first outlet port 212, thereby avoiding the introduction of external conduits, which simplifies the structure of the rotor 100 and makes the overall structure of the rotor 100 more compact.

[0071] Of course, this application is not limited to this. In other embodiments, the first inlet port 211 may also be located on the end face of the first end plate 2 facing away from the rotor core 1. It is understood that in this case, an external conduit is needed to connect the oil slinger hole 45 and the first inlet port 211.

[0072] Please return to the reference. Figure 3 In some embodiments, the oil outlet channel 31 includes a second inlet port 311 and a second outlet port 312. The second inlet port 311 is located on the end face of the second end plate 3 facing the rotor core 1 and communicates with the oil passage 11. The second outlet port 312 is located on the inner circumferential surface of the second end plate 3.

[0073] In this way, the cooling oil can flow directly from the second discharge port 312 of the oil outlet channel 31 into the oil return hole 46, and then into the second cavity 432, thereby avoiding the introduction of external conduits, which further simplifies the structure of the rotor 100 and makes the overall structure of the rotor 100 more compact.

[0074] Of course, this application is not limited to this. In other embodiments, the second discharge port 312 may also be located on the end face of the second end plate 3 facing away from the rotor core 1. It is understood that in this case, an external conduit is needed to connect the second discharge port 312 and the oil return hole 46.

[0075] This application also provides an oil-cooled motor, including the rotor 100 described in any of the foregoing embodiments.

[0076] Since the oil-cooled motor provided in this embodiment includes the rotor 100 described in any of the embodiments of the first aspect above, both can solve the same technical problem and achieve the same beneficial effects. Therefore, the beneficial effects of the oil-cooled motor provided in this application embodiment can be referred to the beneficial effects of the rotor 100, and will not be repeated here.

[0077] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0078] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0079] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0080] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0081] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0082] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A rotor (100), characterized in that, include: Rotor core (1), first end plate (2), and second end plate (3); The rotor core (1) has an oil passage (11) that runs through the rotor core (1) along its own axial direction, and there are at least two oil passages (11); the first end plate (2) and the second end plate (3) are provided at both ends of the rotor core (1) in the axial direction; An oil inlet channel (21) is formed on the first end plate (2); an oil outlet channel (31) is formed on the first end plate (2) or the second end plate (3); at least one first oil collection groove (32) is provided on the end face of the second end plate (3) facing the rotor core (1). Each of the first oil collection grooves (32) and the two oil passages (11) are directly connected in the axial direction of the rotor core (1), and each of the first oil collection grooves (32) and the corresponding two oil passages (11) define an oil passage; In the two oil passages (11) of the same oil circuit, one of the oil passages (11) is the first passage (11a) and the other oil passage (11) is the second passage (11b); the fluid flows in opposite directions in the first passage (11a) and the second passage (11b), the oil circuit is connected to the oil inlet passage (21) through the first passage (11a) and to the oil outlet passage (31) through the second passage (11b).

2. The rotor (100) according to claim 1, characterized in that, The oil circuit consists of multiple parts; The first end plate (2) has at least one second oil collection groove (22) on the end face facing the rotor core (1). Each of the second oil collection tanks (22) corresponds to two oil passages; in the corresponding second oil collection tanks (22) and two oil passages, the first channel (11a) of one oil passage and the second channel (11b) of the other oil passage are directly connected to the second oil collection tanks (22) in the axial direction of the rotor core (1), so that the fluid flows through multiple oil passages in sequence.

3. The rotor (100) according to claim 2, characterized in that, The oil outlet channel (31) is formed on the second end plate (3); The rotor core (1) also has a discharge channel (12) that runs through the rotor core (1) along its own axial direction. The first end plate (2) has an oil outlet groove (23) on the end face facing the rotor core (1). In the fluid flow path, the second channel (11b) of the downstream oil passage is directly opposite to and connected to the oil outlet groove (23), the discharge channel (12) is directly opposite to and connected to the oil outlet groove (23), and the discharge channel (12) is directly connected to the oil outlet channel (31).

4. The rotor (100) according to claim 2, characterized in that, Multiple oil passages are distributed sequentially in the circumferential direction of the rotor core (1) and are connected sequentially.

5. The rotor (100) according to claim 1, characterized in that, Each of the oil passages (11) includes a first oil passage (112) and a magnet mounting passage (111). The first oil passage (112) and the magnet mounting passage (111) are spaced apart in the circumferential direction of the rotor (100), and a magnet is installed in the magnet mounting passage (111).

6. The rotor (100) according to claim 5, characterized in that, The rotor core (1) includes multiple sub-rotor cores (13), which are stacked in the axial direction of the rotor (100). Each sub-rotor core (13) is provided with multiple oil passage holes (131) and multiple magnetic slots (132) arranged at intervals along the circumference of the rotor (100). The oil passage holes (131) and the magnetic slots (132) penetrate the end faces of the corresponding sub-rotor core (13) at both ends in the axial direction. Oil passage holes (131) on any two adjacent sub-rotor cores (13) are arranged facing each other; each first oil passage (112) includes an oil passage hole (131) on each sub-rotor core (13). The magnet slots (132) on any two adjacent sub-rotor cores (13) are arranged facing each other; each magnet mounting channel (111) includes one magnet slot (132) on each sub-rotor core (13).

7. The rotor (100) according to claim 6, characterized in that, In the circumferential direction of the rotor (100), there is a magnetic groove (132) between any two adjacent oil passage holes (131).

8. The rotor (100) according to claim 1, characterized in that, The first oil collecting groove (32) is an arc-shaped groove, and the first oil collecting groove (32) extends along the circumferential direction of the rotor (100).

9. The rotor (100) according to claim 1, characterized in that, It also includes a rotating shaft (4), the rotor core (1), the first end plate (2) and the second end plate (3) are all fixedly sleeved on the rotating shaft (4); the end face of one axial end of the rotating shaft (4) has an oil inlet (41) and the end face of the other axial end of the rotating shaft (4) has an oil outlet (42). The rotating shaft (4) has a cavity (43) inside, and a partition (44) is provided in the cavity (43) to divide the cavity (43) into a first cavity (431) and a second cavity (432). The oil inlet (41) is connected to the first cavity (431), and the oil outlet (42) is connected to the second cavity (432). The outer circumferential surface of the rotating shaft (4) has an oil-throwing hole (45) that communicates with the first cavity (431), and the oil inlet channel (21) is directly connected to the oil-throwing hole (45); The outer circumferential surface of the rotating shaft (4) also has an oil return hole (46) that communicates with the second cavity (432), and the oil outlet channel (31) is directly connected to the oil return hole (46).

10. The rotor (100) according to claim 9, characterized in that, The first cavity (431) and the second cavity (432) are arranged in the axial direction of the rotating shaft (4). The first cavity (431) is closer to the oil inlet (41) than the second cavity (432). The first end plate (2) is closer to the oil inlet (41) than the second end plate (3). The oil outlet channel (31) is located on the second end plate (3).

11. The rotor (100) according to claim 9, characterized in that, The oil inlet channel (21) has a first inlet port (211) and a first outlet port (212). The first inlet port (211) is located on the inner circumferential surface of the first end plate (2), and the first outlet port (212) is located on the end face of the first end plate (2) facing the rotor core (1). The oil passage is connected to the first outlet port (212) through the first channel (11a).

12. The rotor (100) according to claim 9, characterized in that, The oil outlet channel (31) is located on the second end plate (3). The oil outlet channel (31) includes a second inlet port (311) and a second outlet port (312). The second inlet port (311) is located on the end face of the second end plate (3) facing the rotor core (1) and is connected to the oil passage channel (11). The second outlet port (312) is located on the inner circumferential surface of the second end plate (3).

13. An oil-cooled motor, characterized in that, The rotor (100) includes any one of claims 1-12.

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