CN217388413U

CN217388413U - Cooling device and motor assembly with same

Info

Publication number: CN217388413U
Application number: CN202220193793.3U
Authority: CN
Inventors: 张辉; 程云荣; 姚宝塔; 郑诗奇; 王金铭
Original assignee: BYD Co Ltd
Current assignee: Zhengzhou Byd Automobile Co ltd; BYD Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-09-06
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a cooling device and a motor component with the same, wherein the cooling device is used for cooling a motor, the motor comprises a machine shell, a stator component and a rotor component, the cooling device is suitable for being arranged in the machine shell and is arranged at the radial outer side of the stator component, a first cooling liquid channel is limited in the cooling device, and comprises a first pipeline extending along the circumferential direction of the stator component, a second pipeline and a third pipeline extending along the axial direction of the stator component, wherein the first pipeline is provided with a first liquid spraying opening, the second pipeline and the third pipeline are both arranged on the first pipeline, the second pipelines are a plurality of pipelines and are arranged at intervals along the extending direction of the first pipeline, each second pipeline is provided with a second liquid spraying opening, the third pipeline is arranged between two adjacent second pipelines, and a third liquid spraying port is formed, and the first liquid spraying port, the second liquid spraying port and the third liquid spraying port are respectively communicated with the first cooling liquid channel. According to the utility model discloses a cooling device, simple structure is convenient for guarantee the cooling effect to the motor.

Description

Cooling device and motor assembly with same

Technical Field

The utility model belongs to the technical field of the motor cooling technique and specifically relates to a cooling device and motor element who has it is related to.

Background

The motor generates heat in the running process, and the motor is generally cooled by arranging a cooling device; however, in the related art, the cooling device has many parts, a complicated structure, difficulty in installation, and high cost.

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, the utility model provides a cooling device, cooling device simple structure is convenient for guarantee the cooling effect to the motor.

The utility model discloses still provide a motor element who has above-mentioned cooling device.

The cooling device according to an embodiment of the first aspect of the present invention is a cooling device for cooling a motor including a casing, a stator assembly, and a rotor assembly, the cooling device being adapted to be disposed in the casing and radially outside the stator assembly, the cooling device defining a first coolant passage therein and including a first pipe extending in a circumferential direction of the stator assembly, a second pipe and a third pipe extending in an axial direction of the stator assembly, the first pipe being formed with a first liquid ejecting port, the second pipe and the third pipe being disposed in the first pipe, the second pipes being plural and arranged at intervals in an extending direction of the first pipe, each of the second pipes being formed with a second liquid ejecting port, the third pipe being disposed between two adjacent second pipes and formed with a third liquid ejecting port, the first liquid spraying port, the second liquid spraying port and the third liquid spraying port are respectively communicated with the first cooling liquid channel.

According to the utility model discloses cooling device is through setting up first pipeline, second pipeline and third pipeline to make first pipeline along stator module's circumference extension, second pipeline along stator module's axial extension, third pipeline locate between two adjacent second pipelines, in order to guarantee cooling device to whole electronic component's cooling effect, realize the cooling to the motor, and cooling device simple structure, cost are lower.

In some embodiments, the second liquid spraying ports of at least one second pipeline are multiple and comprise a first opening and a second opening which are arranged at intervals along the circumferential direction of the second pipeline, and the included angle between the central axis of the first opening and the central axis of the second opening is alpha, and is more than or equal to 15 degrees and less than or equal to 30 degrees.

In some embodiments, the third liquid spray openings of at least one of the third pipelines are multiple and comprise third openings and fourth openings which are arranged at intervals along the circumferential direction of the third pipeline, and the included angle between the central axis of the third openings and the central axis of the fourth openings is beta, and is more than or equal to 15 degrees and less than or equal to 30 degrees.

In some embodiments, the first pipeline is arranged coaxially with the stator assembly, and on the cross section of the stator assembly, the central angle corresponding to the first pipeline is gamma, wherein gamma is more than or equal to 40 degrees and less than or equal to 80 degrees, and the central angle is the center of an orthographic projection of the central axis of the stator assembly.

In some embodiments, the third pipeline is a plurality of third pipelines and is arranged at intervals along the extending direction of the first pipeline, and one end of the length of each third pipeline is connected to the first pipeline.

In some embodiments, two adjacent third pipelines are respectively located on two radial sides of the first pipeline.

In some embodiments, the cooling device further comprises: and the mounting piece is fixedly arranged on the first pipeline and is used for being fixedly connected with the shell or the stator assembly.

According to the utility model discloses motor element of second aspect embodiment includes: the motor comprises a machine shell, a stator assembly and a rotor assembly, the stator assembly is sleeved outside the rotor assembly and is fixedly connected with the machine shell, the rotor assembly comprises a rotor, a rotating shaft and a balance plate arranged at the axial end part of the rotor, a second cooling liquid channel is defined in the rotating shaft, a third cooling liquid channel communicated with the second cooling liquid channel is defined in the balance plate, and the third cooling liquid channel penetrates through one side surface of the balance plate to form a fourth liquid spraying opening; according to the utility model discloses cooling device of above-mentioned first aspect embodiment, cooling device locates in the casing and locate the radial outside of stator module.

According to the utility model discloses motor element, through adopting foretell cooling device, be convenient for effectively realize the cooling of motor, be convenient for guarantee the NVH performance of motor simultaneously.

In some embodiments, the casing includes an end cover, the end cover is formed with an inlet channel, the inlet channel communicates with the second coolant liquid channel and the first coolant liquid channel respectively, one end of the rotating shaft towards the end cover is provided with a flow guide member, and the flow guide member is used for guiding the coolant liquid of the inlet channel to the second coolant liquid channel and/or distributing the flow of the coolant liquid flowing to the first coolant liquid channel and the second coolant liquid channel.

In some embodiments, the fourth liquid ejecting port is formed on a side surface of the balance plate facing away from the rotor, and a central axis of the fourth liquid ejecting port is disposed obliquely with respect to a central axis of the rotary shaft.

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 schematic view of a cooling device according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of the cooling device shown in FIG. 1 mated with a stator assembly;

fig. 3 is a schematic view of a motor assembly according to an embodiment of the present invention.

Reference numerals are as follows:

a motor assembly 100,

A cooling device 1, a first cooling liquid channel 10,

A first pipeline 11, a first liquid spraying port 110,

A second pipe 12, a second liquid ejection port 120, a first opening 120a, a second opening 120b,

A third pipeline 13, a third liquid spraying port 130,

A mounting member 14, a third opening 130a, a fourth opening 130b,

A motor 2, a liquid outlet 2a,

A housing 21, an end cover 211, a liquid inlet passage 2110, a housing 212,

A stator assembly 22, a first stator end 221, a second stator end 222,

Rotor assembly 23, rotor 231, rotating shaft 232, balance plate 233,

A second coolant channel 2320, a third coolant channel 2330, a fourth spray orifice 2330a,

A flow guide 24.

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.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Next, a cooling device 1 according to an embodiment of the present invention is described with reference to the drawings.

The cooling device 1 is used for cooling the motor 2 so as to ensure that the motor 2 has a proper working temperature, and the long-term normal operation of the motor 2 is facilitated; the motor 2 includes a casing 21, a stator assembly 22 and a rotor assembly 23, the cooling device 1 is suitable for being disposed in the casing 21, and the cooling device 1 is suitable for being disposed on a radial outer side of the stator assembly 22, so that the cooling device 1 can be used for spraying cooling liquid to the stator assembly 22 to cool the stator assembly 22, and heat dissipation requirements of the motor 2 are met.

As shown in fig. 1-3, the cooling device 1 defines a first cooling liquid channel 10 therein, and the cooling device 1 includes a first pipe 11, a second pipe 12 and a third pipe 13, where the first pipe 11 extends along the circumferential direction of the stator assembly 22, for example, the first pipe 11 may extend as a bent pipe (such as a closed annular bent pipe or an open annular bent pipe) to facilitate a good matching between the first pipe 11 and the stator assembly 22; the second pipeline 12 and the third pipeline 13 are both arranged on the first pipeline 11, so that the inside of the second pipeline 12 is communicated with the inside of the first pipeline 11, and the inside of the third pipeline 13 is communicated with the inside of the first pipeline 11, the first pipeline 11 can define one part of the first cooling liquid channel 10, the second pipeline 12 can define another part of the first cooling liquid channel 10, and the third pipeline 13 can define another part of the first cooling liquid channel 10.

It should be noted that the term "open ring" herein refers to: a ring shape with an opening (i.e. a non-closed ring shape), wherein "ring shape" is to be understood in a broad sense, i.e. not limited to "circular ring shape", e.g. also a "polygonal ring" or the like.

The first pipeline 11 is formed with a first liquid spray opening 110, the first liquid spray opening 110 is disposed toward the stator assembly 22, and the first liquid spray opening 110 is communicated with the first cooling liquid channel 10, so that the first liquid spray opening 110 is communicated with the inside of the first pipeline 11, and the cooling liquid in the first cooling liquid channel 10 can be sprayed to the stator assembly 22 through the first liquid spray opening 110.

The second pipelines 12 are multiple, the multiple second pipelines 12 are arranged at intervals along the extending direction of the first pipeline 11, each second pipeline 12 extends along the axial direction of the stator assembly 22, a second liquid spraying opening 120 is formed in each second pipeline 12, the second liquid spraying openings 120 are communicated with the first cooling liquid channel 10, the second liquid spraying openings 120 are communicated with the inside of the second pipelines 12, and cooling liquid in the first cooling liquid channel 10 can be sprayed to the stator assembly 22 through the second liquid spraying openings 120.

The third pipeline 13 is disposed between two adjacent second pipelines 12, the third pipeline 13 is formed with a third liquid spraying port 130, the third liquid spraying port 130 is communicated with the first cooling liquid channel 10, the third liquid spraying port 130 is communicated with the inside of the third pipeline 13, and the cooling liquid in the first cooling liquid channel 10 can be sprayed to the stator assembly 22 through the third liquid spraying port 130.

It is understood that the first line 11 may be one or more, and the third line 13 may be one or more; when the number of the first pipelines 11 is multiple, the multiple first pipelines 11 may be arranged at intervals along the axial direction of the stator assembly 22, and the interior of at least one first pipeline 11 is respectively communicated with the interior of the second pipeline 12 and the interior of the third pipeline 13; when the third pipe 13 is plural, the plural third pipe 13 may be arranged along the circumferential direction of the stator assembly 22 and/or the axial direction of the stator assembly 22 at intervals, and the inside of each third pipe 13 is communicated with the inside of the corresponding first pipe 11. The second pipe 12 may extend as a straight pipe or as a bent pipe, and the third pipe 13 may extend as a straight pipe or as a bent pipe. Furthermore, the direction of extension of the third pipe 13 may be parallel or non-parallel to the direction of extension of the second pipe 12.

Further, one or more first liquid ejection ports 110 are provided in the first pipe 11, one or more second liquid ejection ports 120 are provided in the second pipe 12, and one or more third liquid ejection ports 130 are provided in the third pipe 13. For example, when there is one first liquid ejection port 110 on the first pipeline 11, the first liquid ejection port 110 may be formed as a long-strip-shaped opening, so as to ensure a liquid ejection range of the first liquid ejection port 110, and ensure cooling efficiency and cooling effect on the stator assembly 22.

For example, in the example of fig. 1 and 2, there are one first pipeline 11, two second pipelines 12 are respectively disposed at both ends of the length of the first pipeline 11, or at least one second pipeline 12 is disposed at intervals from one end of the corresponding length of the first pipeline 11, each second pipeline 12 extends to be a straight pipe, there are two third pipelines 13, two third pipelines 13 are disposed at intervals from the extending direction of the first pipeline 11, and the extending direction of each third pipeline 13 is parallel to the extending direction of the second pipeline 12, so that the cooling device 1 has a "king" shape structure; the first liquid spraying ports 110 on the first pipeline 11 are arranged at intervals in the extending direction of the first pipeline 11, the second liquid spraying ports 120 on the second pipeline 12 are arranged at intervals in the extending direction of the second pipeline 12, the third liquid spraying ports 130 on the third pipeline 13 are arranged at intervals in the extending direction of the third pipeline 13, and then the first liquid spraying ports 110 are matched with the second pipeline 12 and the third pipeline 13, so that the cooling effect of the stator assembly 22 in the circumferential direction is ensured, and the second liquid spraying ports 120 are matched with the third liquid spraying ports 130, so that the cooling effect of the stator assembly 22 in the axial direction is ensured.

According to the utility model discloses cooling device 1, through setting up first pipeline 11, second pipeline 12 and third pipeline 13 to make first pipeline 11 along stator module 22's circumference extension, second pipeline 12 along stator module 22's axial extension, third pipeline 13 locate between two adjacent second pipelines 12, in order to guarantee cooling device 1 to the cooling effect of whole electronic component 22 (including stator winding), realize the cooling to motor 2, and cooling device 1 simple structure, cost are lower.

Optionally, at least one of the first liquid spraying ports 110 on the single first pipeline 11, the second liquid spraying ports 120 on the single second pipeline 12 and the third liquid spraying ports 130 on the single third pipeline 13 is multiple, which is beneficial to improving the liquid spraying range of the cooling device 1, so that the cooling range of the stator assembly 22 is improved, and the cooling efficiency and the cooling effect on the stator assembly 22 are ensured.

Alternatively, in the example of fig. 1-2, there are two second pipelines 12, and each second pipeline 12 is connected to one end of the length of the first pipeline 11, so as to form a "t" shaped structure between the first pipeline 11 and the second pipeline 12, thereby facilitating to ensure the welding strength of the first pipeline 11 and the second pipeline 12 when the second pipeline 12 is welded to the first pipeline 11.

Of course, the connection manner of the second pipeline 12 and the first pipeline 11 is not limited thereto; for example, the second pipeline 12 is spaced from the end of the length of the first pipeline 11 and/or one end of the length of the second pipeline 12 is connected to the first pipeline 11.

In some embodiments, as shown in fig. 1-2, the second liquid ejecting opening 120 of at least one second pipe 12 is multiple, and the multiple second liquid ejecting openings 120 of the second pipe 12 include a first opening 120a and a second opening 120b spaced along the circumference of the second pipe 12, and an included angle between a central axis of the first opening 120a and a central axis of the second opening 120b is α, 15 ° ≦ α ≦ 30 °, for example, α may be 15 °, or 20 °, or 24 °, or 30 °, and the like, and then the cooling liquid at the first opening 120a and the cooling liquid at the second opening 120b are respectively ejected toward different directions to increase the liquid ejecting range of the second pipe 12, so that the cooling liquid ejected from the first opening 120a and the second opening 120b uniformly covers the outer circumferential wall of the stator assembly 22, which facilitates cooling of the entire stator assembly 22.

It can be seen that the number of second tubes 12 having first openings 120a and second openings 120b is less than or equal to the total number of second tubes 12; when the at least two second pipelines 12 each have the first opening 120a and the second opening 120b, the number of the first openings 120a and the second openings 120b on the at least two second pipelines 12 may be the same or different.

It can be understood that the first opening 120a and the second opening 120b may form a set of first nozzle sets, the plurality of second liquid injection openings 120 on the second pipe 12 may include one or more sets of first nozzle sets, and the plurality of sets of first nozzle sets may be arranged at intervals along the extending direction of the second pipe 12, so that the cooling liquid injected from the second pipe 12 uniformly covers the outer circumferential wall of the stator assembly 22 in the axial direction of the stator assembly 22.

Alternatively, in the example of fig. 1-2, each second pipe 12 has a first nozzle group, the two axial ends of the stator assembly 22 are respectively a first stator end 221 and a second stator end 222, the plurality of second nozzle holes 120 on the second pipe 12 include two first nozzle groups, one of the first nozzle groups corresponds to the first stator end 221 for spraying the cooling liquid toward the first stator end 221, the other of the second nozzle groups corresponds to the second stator end 222 for spraying the cooling liquid toward the second stator end 222, a plurality of second nozzle holes 120 spaced along the extending direction of the second pipe 12 are disposed between the two first nozzle groups, and the plurality of second nozzle holes 120 may correspond to the stator core of the stator assembly 22 for spraying the cooling liquid toward the stator core.

In some embodiments, as shown in fig. 1-2, the third liquid spraying openings 130 of the at least one third pipeline 13 are multiple, and the multiple third liquid spraying openings 130 of the third pipeline 13 include third openings 130a and fourth openings 130b arranged at intervals along the circumferential direction of the third pipeline 13, an included angle between a central axis of the third opening 130a and a central axis of the fourth opening 130b is β, and an included angle between the central axis of the third opening 130a and the central axis of the fourth opening 130b is β, and is greater than or equal to 15 ° and less than or equal to 30 °, then the cooling liquid at the third opening 130a and the cooling liquid at the fourth opening 130b are respectively sprayed toward different directions, so as to increase the liquid spraying range of the third pipeline 13, so that the cooling liquid sprayed from the third opening 130a and the fourth opening 130b uniformly covers the outer circumferential wall of the stator assembly 22, which is favorable for cooling the entire stator assembly 22.

It can be seen that the number of third tubes 13 having third and

fourth openings

130a, 130b is less than or equal to the total number of third tubes 13; when the at least two third pipes 13 each have the third opening 130a and the fourth opening 130b, the number of the third opening 130a and the fourth opening 130b on the at least two third pipes 13 may be the same or different.

It can be understood that the third opening 130a and the fourth opening 130b may form a set of second nozzle sets, and the plurality of third liquid injection openings 130 on the third pipe 13 may include one or more sets of second nozzle sets, and the plurality of sets of second nozzle sets may be arranged at intervals along the extending direction of the third pipe 13, so that the cooling liquid injected from the third pipe 13 uniformly covers the outer circumferential wall of the stator assembly 22 in the axial direction of the stator assembly 22.

Alternatively, in the example of fig. 1-2, there are two third pipelines 13, each third pipeline 13 has a set of second nozzle groups, the two axial ends of the stator assembly 22 are respectively a first stator end 221 and a second stator end 222, the second nozzle group of one third pipeline 13 corresponds to the first stator end 221 for spraying the cooling liquid toward the first stator end 221, the second nozzle group of the other third pipeline 13 corresponds to the second stator end 222 for spraying the cooling liquid toward the second stator end 222, and each third pipeline 13 is further formed with third liquid spraying ports 130 spaced from the second nozzle group.

In some embodiments, as shown in fig. 1-2, the first pipe 11 is disposed coaxially with the stator assembly 22, that is, a central axis of the annular structure corresponding to the first pipe 11 coincides with a central axis of the stator assembly 22, and on a cross section of the stator assembly 22, a central angle corresponding to the first pipe 11 is γ, γ is greater than or equal to 40 ° and less than or equal to 80 °, for example, may be 40 °, or 50 °, or 60 °, or 75 °, or 80 °, and the like, with respect to an orthographic projection of the central axis of the stator assembly 22, so as to ensure a spray range of the first pipe 11 in a circumferential direction of the stator assembly 22, and simultaneously, to ensure an arrangement space of the third pipe 13 and the plurality of second pipes 12, so as to ensure a spray range of the second pipe 12 and the third pipe 13 in an axial direction of the stator assembly 22.

In some embodiments, as shown in fig. 1-2, the third pipeline 13 is multiple, and the multiple third pipelines 13 are arranged at intervals along the extending direction of the first pipeline 11, and one end of the length of each third pipeline 13 is connected to the first pipeline 11, so that the other end of the length of each third pipeline 13 can be formed as a free end to form a "t" shaped structure between the first pipeline 11 and the third pipeline 13, so as to ensure that the multiple welding seams formed by the first pipeline 11 and the multiple third pipelines 13 are staggered along the extending direction of the first pipeline 11 when the first pipeline 11 and the multiple third pipelines 13 are welded and connected respectively, thereby ensuring the welding strength of the first pipeline 11 and each third pipeline 13.

Of course, the arrangement of the third piping 13 is not limited thereto; for example, the middle portion of the third pipe 13 is connected to the first pipe 11 such that a portion of the third pipe 13 is located on one side of the first pipe 11 in the axial direction of the stator assembly 22 and another portion of the third pipe 13 is located on the other side of the first pipe 11 in the axial direction of the stator assembly 22.

In some embodiments, as shown in fig. 1-2, two adjacent third pipelines 13 are respectively located at two radial sides of the first pipeline 11, and one of the two adjacent third pipelines 13 is located at one side of the first pipeline 11 in the axial direction of the stator assembly 22, and the other is located at the other side of the first pipeline 11 in the axial direction of the stator assembly 22, so as to expand the spray range of the third pipelines 13 in the axial direction of the stator assembly 22.

Of course, the arrangement of the third piping 13 is not limited thereto; for example, the plurality of third pipelines 13 are all located on the same radial side of the first pipeline 11, so that the plurality of third pipelines 13 are all located on the same axial side of the first pipeline 11 in the stator assembly 22, or the number of the third pipelines 13 is three or more and includes two groups of pipeline groups, one of the group of pipeline groups is located on one axial side of the first pipeline 11 in the stator assembly 22, and the other group of pipeline groups is located on the other axial side of the first pipeline 11 in the stator assembly 22.

In some embodiments, as shown in fig. 1-2, the cooling device 1 further includes a mounting member 14, the mounting member 14 is fixedly disposed on the first pipeline 11, and the mounting member 14 is configured to be fixedly connected to the casing 21 or the stator assembly 22, so as to achieve reliable installation of the cooling device 1 and facilitate installation of the cooling device 1.

Alternatively, in the example of fig. 1-2, the mounting member 14 is formed as a plate-like structure, one end of the mounting member 14 is fixedly connected to the first pipeline 11, for example, the mounting member 14 is welded to the first pipeline 11, and the other end of the mounting member 14 is formed with a mounting hole in which a fastening member is disposed, and the fastening member is fixedly connected to the housing 21. Wherein, the fastener can be a bolt, a screw and the like.

It is understood that the flowing power of the cooling oil in the cooling device 1 can be derived from a liquid driving device, such as a pump, etc., and the installation position of the liquid driving device can be specifically set according to actual requirements.

According to the utility model discloses motor element 100 of second aspect embodiment, as shown in fig. 3, including motor 2 and cooling device 1, motor 2 includes casing 21, stator assembly 22 and rotor assembly 23 all locate casing 21, stator assembly 22 overlaps outside locating rotor assembly 23, and stator assembly 22 is fixed continuous with casing 21, cooling device 1 is located in casing 21, and cooling device 1 locates stator assembly 22's the radial outside, then cooling device 1 can locate between casing 21's the internal perisporium and stator assembly 22's the periphery wall, in order to be used for cooling stator assembly 22.

The rotor assembly 23 includes a rotor 231, a rotating shaft 232 and two balancing plates 233 arranged at axial ends of the rotor 231, a second cooling liquid channel 2320 is defined in the rotating shaft 232, two balancing plates 233 are provided, a third cooling liquid channel 2330 communicated with the second cooling liquid channel 2320 is defined in each balancing plate 233, the third cooling liquid channel 2330 penetrates through one side surface of the balancing plate 233 to form a fourth liquid spraying opening 2330a, and then the cooling liquid in the second cooling liquid channel 2320 can flow to the third cooling liquid channel 2330 and flow to a space defined by an inner peripheral wall of the stator assembly 22 from the fourth liquid spraying opening 2330a, so that the rotor 231, the rotating shaft 232, the balancing plates 233 and the stator assembly 22 are cooled.

Obviously, when the rotor assembly 23 is cooled, the cooling liquid does not flow through the inside of the rotor 231, so that the structure of the rotor 231 is simplified, and the dynamic balance precision of the rotor assembly 23 is ensured, thereby ensuring the NVH performance of the motor 2 and reducing the loss of the rotor 231.

According to the utility model discloses motor element 100, through adopting foretell cooling device 1, be convenient for effectively realize motor 2's cooling, be convenient for guarantee motor 2's NVH performance simultaneously.

It is understood that the flow power of the cooling oil in the second cooling liquid passage 2320 may be derived from a liquid driving device such as a pump or the like. The cooling liquid flowing out of the cooling device 1 and the fourth liquid spraying port 2330a are finally equalized to the inside of the casing 21, and the casing 21 may be formed with a liquid outlet 2a, so as to realize the recycling of the cooling liquid, for example, the cooling liquid may be cooled after flowing out through the liquid outlet 2a, so as to effectively cool the motor 2 again; wherein the cooling liquid in the housing 21 can cool the bearings of the motor 2.

In some embodiments, as shown in fig. 3, the housing 21 includes the end cover 211, the end cover 211 is formed with the liquid inlet channel 2110, and the liquid inlet channel 2110 is communicated with the second cooling liquid channel 2320 and the first cooling liquid channel 10, so that the cooling liquid in the liquid inlet channel 2110 may partially flow to the second cooling liquid channel 2320 for cooling the rotor assembly 23, and partially flow to the first cooling liquid channel 10 for cooling the stator assembly 22, and the cooling liquid may also cool the end cover 211 during flowing in the liquid inlet channel 2110 to ensure a cooling effect on the motor 2. At this time, the coolant in the second coolant passage 2320 and the coolant in the first coolant passage 10 may be driven to flow only by applying flowing power to the coolant in the inlet passage 2110.

As shown in fig. 3, an end of the rotating shaft 232 facing the end cover 211 is provided with a flow guiding element 24, and the flow guiding element 24 is used for guiding the coolant in the liquid inlet passage 2110 to the second coolant passage 2320 and/or distributing the flow of the coolant to the first coolant passage 10 and the second coolant passage 2320. When the flow guide 24 is used for guiding the coolant in the liquid inlet channel 2110 to the second coolant channel 2320, the smoothness of the coolant flowing from the liquid inlet channel 2110 to the second coolant channel 2320 is ensured, and the flow resistance is reduced; when the flow guide 24 is used to distribute the flow of the coolant flowing to the first coolant passage 10 and the second coolant passage 2320, it is convenient to ensure that the flow of the coolant flowing to the first coolant passage 10 matches the cooling effect to be achieved by the first coolant passage 10, and that the flow of the coolant flowing to the second coolant passage 2320 matches the cooling effect to be achieved by the second coolant passage 2320.

Alternatively, in the example of fig. 3, the second cooling liquid passage 2320 extends in the axial direction of the rotating shaft 232, and the second cooling liquid passage 2320 penetrates through the end of the rotating shaft 232 where the flow guide 24 is located, the flow guide 24 is disposed adjacent to a bearing on the rotating shaft 232, the bearing is mounted on the end cover 211, the flow guide 24 is formed in an annular structure, and the flow guide 24 defines a communication passage which is provided at the end of the rotating shaft 232 and is communicated with the second cooling liquid passage 2320, and the cross-sectional area of the communication passage is substantially identical to the cross-sectional area of the portion of the liquid inlet passage 2110 leading to the first cooling liquid passage 10; the rotating shaft 232 is formed with two communication ports, each of which communicates the second coolant passage 2320 and a corresponding third coolant passage 2330.

Optionally, the second pipeline 12 and/or the third pipeline 13 are connected to the end cover 211, so that the interior of at least one of the second pipeline 12 and the third pipeline 13 is communicated with the liquid inlet channel 2110, thereby realizing the communication between the liquid inlet channel 2110 and the first cooling liquid channel 10, and simultaneously facilitating the improvement of the installation firmness of the cooling device 1.

Alternatively, in the example of fig. 3, the housing 21 includes a housing 212, and a channel communicating with the liquid inlet channel 2110 is formed on the housing 212, and the cooling liquid flows to the channel and flows to the liquid inlet channel 2110 through the channel, so as to realize the cooling of the motor 2 in all directions.

In some embodiments, as shown in fig. 3, the fourth liquid ejection port 2330a is formed in a side surface of the balance plate 233 facing away from the rotor 231, and in the example of fig. 3, the fourth liquid ejection port 2330a of the left balance plate 233 is formed in a left side surface of the balance plate 233 and the fourth liquid ejection port 2330a of the right balance plate 233 is formed in a right side surface of the balance plate 233; the central axis of the fourth liquid spray openings 2330a is arranged obliquely with respect to the central axis of the rotating shaft 232, so that the cooling liquid sprayed from the fourth liquid spray openings 2330a flows obliquely with respect to the central axis of the rotating shaft 232, which is beneficial for cooling the axially displaced part of the stator assembly 22 with respect to the rotor assembly 23, for example, the cooling liquid at the fourth liquid spray openings 2330a of the left balancing plate 233 can flow to the inner peripheral wall of the first stator end 221 under the action of centrifugal force and the like, and the cooling liquid at the fourth liquid spray openings 2330a of the right balancing plate 233 can flow to the inner peripheral wall of the second stator end 222 under the action of centrifugal force and the like, thereby improving the cooling uniformity and efficiency of the stator assembly 22.

Optionally, an included angle between the central axis of the fourth liquid spray nozzle 2330a and the central axis of the rotating shaft 232 is in a range of 30 ° to 80 °.

Alternatively, the cooling fluid is cooling oil, so that lubrication can be performed while cooling the motor 2.

It is understood that the motor assembly 100 of the present application may be used in a vehicle such as a new energy automobile, etc., but is not limited thereto.

Other constructions and operations of the motor assembly 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

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 the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and 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 therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to 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 in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present 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

1. A cooling device (1), wherein the cooling device (1) is used for cooling an electric machine (2), the electric machine (2) comprises a machine shell (21), a stator assembly (22) and a rotor assembly (23), the cooling device (1) is suitable for being arranged in the machine shell (21) and is arranged on the radial outer side of the stator assembly (22), a first cooling liquid channel (10) is defined in the cooling device (1), the cooling device comprises a first pipeline (11) extending along the circumferential direction of the stator assembly (22), a second pipeline (12) and a third pipeline (13) extending along the axial direction of the stator assembly (22), a first liquid spraying opening (110) is formed in the first pipeline (11), the second pipeline (12) and the third pipeline (13) are both arranged on the first pipeline (11), the second pipelines (12) are multiple and are arranged at intervals along the extending direction of the first pipeline (11), each second pipeline (12) is provided with a second liquid spraying opening (120), each third pipeline (13) is arranged between every two adjacent second pipelines (12) and is provided with a third liquid spraying opening (130), and the first liquid spraying opening (110), the second liquid spraying opening (120) and the third liquid spraying opening (130) are respectively communicated with the first cooling liquid channel (10).

2. A cooling device (1) as in claim 1, characterized by the fact that the second liquid spray orifices (120) of at least one of the second conduits (12) are plural and comprise first openings (120a) and second openings (120b) arranged at intervals in the circumferential direction of the second conduit (12), the angle between the central axis of the first openings (120a) and the central axis of the second openings (120b) being α, 15 ° ≦ α ≦ 30 °.

3. A cooling device (1) as in claim 1, characterized by the fact that said third liquid spray openings (130) of at least one of said third lines (13) are plural and comprise third openings (130a) and fourth openings (130b) spaced circumferentially of said third line (13), the angle between the central axis of said third openings (130a) and the central axis of said fourth openings (130b) being β, 15 ° ≦ β ≦ 30 °.

4. The cooling device (1) according to claim 1, wherein the first pipeline (11) is arranged coaxially with the stator assembly (22), and on the cross section of the stator assembly (22), the central angle corresponding to the first pipeline (11) is γ, wherein γ is greater than or equal to 40 ° and less than or equal to 80 ° with the orthographic projection of the central axis of the stator assembly (22) as the center.

5. A cooling device (1) according to claim 1, wherein the third pipelines (13) are plural and arranged at intervals along the extending direction of the first pipeline (11), and one end of the length of each third pipeline (13) is connected to the first pipeline (11).

6. A cooling device (1) as in claim 5, characterized by two adjacent third pipelines (13) situated radially on either side of the first pipeline (11).

7. A cooling apparatus (1) as in any one of claims 1-6, characterized by further comprising:

the mounting piece (14) is fixedly arranged on the first pipeline (11) and is used for being fixedly connected with the machine shell (21) or the stator assembly (22).

8. An electric machine assembly (100), comprising:

the motor (2), the motor (2) includes a casing (21), a stator assembly (22) and a rotor assembly (23), the stator assembly (22) is sleeved outside the rotor assembly (23) and is fixedly connected with the casing (21), the rotor assembly (23) includes a rotor (231), a rotating shaft (232) and a balance plate (233) arranged at an axial end of the rotor (231), a second cooling liquid channel (2320) is defined in the rotating shaft (232), a third cooling liquid channel (2330) communicated with the second cooling liquid channel (2320) is defined in the balance plate (233), and the third cooling liquid channel (2330) penetrates through one side surface of the balance plate (233) to form a fourth liquid spraying port (2330 a);

a cooling device (1) according to any of claims 1-7, said cooling device (1) being provided within said casing (21) and radially outside said stator assembly (22).

9. The electric machine assembly (100) of claim 8, characterized in that the housing (21) comprises an end cover (211), the end cover (211) is formed with an inlet channel (2110), the inlet channel (2110) is communicated with the second cooling liquid channel (2320) and the first cooling liquid channel (10) respectively,

one end, facing the end cover (211), of the rotating shaft (232) is provided with a flow guide piece (24), and the flow guide piece (24) is used for guiding the cooling liquid in the liquid inlet channel (2110) to the second cooling liquid channel (2320) and/or distributing the flow of the cooling liquid flowing to the first cooling liquid channel (10) and the second cooling liquid channel (2320).

10. The motor assembly (100) according to claim 8, wherein the fourth liquid ejection port (2330a) is formed at a side surface of the balance plate (233) facing away from the rotor (231), and a central axis of the fourth liquid ejection port (2330a) is disposed obliquely to a central axis of the rotation shaft (232).