Motor cooling structure, motor cooling system and vehicle

Abstract

The invention discloses a motor cooling structure, a motor cooling system and a vehicle, and the motor cooling structure comprises a gas supply device which is used for supplying gas; the vortex tube is connected with the gas supply device and is used for separating the gas into cold gas and hot gas; and the air path assembly is connected with the vortex tube and is used for conveying the cold air to a stator winding. Therefore, gas is supplied to the vortex tube through the gas supply device, hot gas and cold gas are generated by utilizing the characteristics of the vortex tube, and the cold gas is conveyed to the stator winding through the gas circuit assembly so as to cool the stator winding.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor cooling structure, a motor cooling system and a vehicle. Background Art

[0002] In the related art, the heat dissipation method of the motor is usually air cooling. The air cooling technology has a complex structure, usually consumes a certain amount of power through structures such as fans or wind thorns (such as rotor wind thorns), and has low overall efficiency. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a motor cooling structure, which has a good cooling effect.

[0004] The application also provides a motor cooling system.

[0005] The application also proposes a vehicle.

[0006] According to the motor cooling structure of the first aspect embodiment of the present application, it includes: a gas supply device, which is used to supply gas; a vortex tube, which is connected to the gas supply device and is used to separate the gas into cold air and hot air; and an air path component, which is connected to the vortex tube and is used to transport the cold air to the stator winding.

[0007] According to some embodiments of the present application, the air circuit assembly includes: a jet pipeline, which is provided with a jet port, and the jet port is used to deliver cold air to the stator winding; and a connecting pipeline, which is connected between the air inlet end of the jet pipeline and the cold air outlet end of the vortex tube, and is used to deliver the cold air to the jet pipeline.

[0008] According to some embodiments of the present application, the connecting pipeline includes: a first pipe segment, one end of which is connected to the vortex tube; and a second pipe segment, one end of which is connected to the other end of the first pipe segment, and the other end of the second pipe segment is connected to the jet pipeline.

[0009] According to some embodiments of the present application, the second tube segment extends along the axial direction of the stator winding.

[0010] According to some embodiments of the present application, the air injection pipeline and the stator winding are arranged opposite to each other and spaced apart in the axial direction.

[0011] According to some embodiments of the present application, the jet pipeline is annular and is provided with a plurality of jet ports, and the plurality of jet ports are arranged in a circle and spaced apart in sequence.

[0012] According to some embodiments of the present application, the air circuit assembly is provided with a plurality of air supply branches, the plurality of air supply branches are arranged in parallel, and respectively deliver the cold air to the plurality of stator windings.

[0013] According to some embodiments of the present application, the gas supply device is an air compressor, which is used to compress air and is suitable for delivering the compressed gas to the air inlet of the vortex tube.

[0014] According to some embodiments of the present application, the rotation speed of the air compressor is adjustable to adjust the air intake volume of the vortex tube per unit time.

[0015] According to the second aspect of the present application, a motor cooling system includes a motor and the above-mentioned motor cooling structure.

[0016] According to some embodiments of the present application, the motor includes a shell, the stator winding is arranged in a cavity of the shell, and the vortex tube and / or the gas supply device are installed on the shell and located outside the cavity.

[0017] According to some embodiments of the present application, the shell includes an end cover, and the air circuit assembly includes an air jet pipeline, which is arranged on a side of the stator winding away from the end cover in the axial direction and is used to transport cold air to the axial end of the stator winding.

[0018] According to some embodiments of the present application, the air circuit assembly also includes a connecting pipeline connected between the cold air outlet end of the vortex tube and the jet pipeline, and the connecting pipeline includes a first pipe section arranged on the outside of the shell and a second pipe section located in the cavity, the first pipe section and the second pipe section are respectively connected to the end cover, and the first pipe section is connected to the second pipe section.

[0019] According to some embodiments of the present application, the end cover is provided with an exhaust channel connected to the cavity, and the exhaust channel is used for exhausting the gas in the cavity.

[0020] According to some embodiments of the present application, the exhaust passage is provided at an upper position of the motor in an installation direction.

[0021] According to the vehicle of the third aspect of the present application, the vehicle includes the above-mentioned motor cooling system.

[0022] The motor cooling structure according to the embodiment of the present application has at least the following technical effects:

[0023] (1) In the present application, the gas can be continuously delivered to the vortex tube through the gas supply device, and the gas is separated into hot gas and cold gas through the vortex tube, and the dry cold gas is continuously delivered to the cavity to spray forced air cooling on the axial end of the stator winding to ensure the cooling effect of the stator winding, which is beneficial to the heat dissipation of the motor under low speed and high torque conditions.

[0024] At the same time, other components arranged in the cavity (such as the rotor assembly, etc.), the inner side of the end cover, etc. can be kept in a relatively stable low-temperature environment for a long time, ensuring the reliability of motor cooling.

[0025] (2) The vortex tube can be fixed on the housing of the motor by screwing, embedding, etc., so as to facilitate the matching of the layout position and layout angle with the whole vehicle and optimize the component layout.

[0026] (3) The end cover in the present application is provided with an exhaust channel, which is used to discharge the high-temperature gas in the cavity, and promote the uniformity of the temperature inside the cavity through the convection of cold air and hot air. At the same time, the gas outlet is arranged at the end cover, away from the core components of the motor (such as: stator, rotor, stator winding, etc.), to reduce the influence of thermal interference.

[0027] (4) The fixing method of the gas circuit assembly and the matching method of the gas circuit assembly and the end cover in the present application are highly reliable, and the air injection pipeline delivers cold air to one side of the stator winding with good accuracy and uniformity.

[0028] (5) The gas supply device is an air compressor, and the speed of the air compressor is adjustable. The flow rate and pressure of the compressed gas entering the vortex tube can be adjusted by adjusting the speed of the air compressor, thereby controlling the speed and pressure of the cold air output by the gas circuit component, which is convenient for adjusting the cold air flow rate and temperature of the vortex tube, so that the cooling performance of the motor can be adjusted in time according to the operating status of the motor.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 The structure of the motor cooling structure according to the embodiment of the present application is schematically shown in FIG. Figure 1 ;

[0032] Figure 2 The structure of the motor cooling structure according to the embodiment of the present application is schematically shown in FIG. Figure 2 ;

[0033] Figure 3It is a schematic diagram of the coordination between the gas circuit assembly and the end cover according to the embodiment of the present application.

[0034] Reference numerals:

[0035] Motor cooling structure 100;

[0036] End cover 1; exhaust channel 11; stator winding 21; stator 22; rotor assembly 23; gas supply device 3; vortex tube 4;

[0037] Gas circuit assembly 5; jet pipeline 51; jet port 52; connecting pipeline 53; first pipe section 531; second pipe section 532; connecting portion 54; connecting piece 6. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] Reference below Figure 1-Figure 3 The motor cooling structure 100 according to the embodiment of the present application is described, and the motor cooling structure 100 includes a gas supply device 3, a vortex tube 4 and a gas circuit assembly 5. The motor cooling structure 100 in the present application is used to cool the stator winding 21 in the motor.

[0040] The vortex tube 4 is connected to the gas supply device 3, the gas supply device 3 is used to supply gas to the vortex tube 4, and the vortex tube 4 is used to separate the gas into cold gas and hot gas. The gas circuit component 5 is connected to the vortex tube 4, and the gas circuit component 5 is used to transport the cold gas to the stator winding 21 to reduce the temperature of the stator winding 21. Figure 2 , cold air can be delivered to the end of the stator winding 21.

[0041] Specifically, gas is transported to the vortex tube 4 through the gas supply device 3, and the gas is separated into cold air and hot air through the vortex tube 4. The cold air is further transported to the axial end of the stator winding 21 through the air path assembly 5, so as to exchange heat with the stator winding 21 through the cold air, thereby cooling the stator winding 21.

[0042] It should be noted that, after conversion by the vortex tube 4, cold air and hot air can be generated at both ends of the vortex tube 4, and the specific principle will not be explained. Therefore, the vortex tube 4 can be constructed as a cooling source, and the cold air generated by the vortex tube 4 cools the stator winding 21.

[0043] In the related art, the heat dissipation methods of the motor are usually air cooling, water cooling and oil cooling. Water cooling usually sets a flow channel for the heat exchange medium to circulate on the motor housing or constructs the motor housing into an inner and outer liner structure, and indirectly cools the motor by cooling the motor housing, which results in low heat dissipation efficiency of the motor, and cannot meet the 5.0kw / kg required by the Chinese automobile industry plan, and has high requirements for the processing of the motor housing. The air cooling technology has a complex structure, usually consumes a certain amount of power through structures such as fans or wind thorns (such as: rotor wind thorns), and has low overall efficiency. Oil-cooled motors are directly contact cooled, but the cooling circuit design of oil-cooled motors is complex, the oil injection accuracy and uniformity are not high, and the motor processing accuracy and sealing requirements are high, resulting in difficulty and high cost in the production of motors.

[0044] In the present application, a vortex tube 4 and a gas supply device 3 are provided on the motor cooling structure 100. Gas is supplied to the vortex tube 4 through the gas supply device 3, and the characteristics of the vortex tube 4 itself are used to generate hot air and cold air. The cold air is transported to the axial end of the stator winding 21 through the air path component 5 to cool the stator winding 21.

[0045] Compared with the above-mentioned water cooling and oil cooling methods, the motor cooling structure 100 in the present application does not need to design a complex cooling circuit or construct the shell into an inner and outer liner structure, which can reduce the difficulty of designing and processing the shell. Compared with the existing air cooling method, the cold air can be directly delivered to the axial end of the stator winding 21 through the air path assembly 5. The structure is simple and more efficient, and is less restricted.

[0046] In some embodiments of the present application, the motor further includes a housing having a cavity, the stator winding 21 is disposed in the cavity, and the vortex tube 4 is mounted on the housing.

[0047] Reference Figure 1 The motor includes a stator 22, a stator winding 21 is mounted on the stator 22, and the stator 22 and the stator winding 21 are arranged on the inner side of the end cover 1 (i.e., arranged in the cavity). The vortex tube 4 is fixed on the shell, and the vortex tube 4 is arranged on the outer side of the shell. The vortex tube 4 does not need to occupy the space of the cavity, which can prevent the vortex tube 4 from interfering with the components in the cavity and facilitate the arrangement of the gas path component 5.

[0048] In some embodiments of the present application, the shell includes an end cover 1 and a shell body, and the end cover 1 is covered on the shell body and forms the above-mentioned cavity together with the shell body.

[0049] It is understandable that when the motor is in operation, the temperature of the stator winding 21 is relatively high, and the stator winding 21 can be cooled by delivering cold air to the stator winding 21 region through the gas path assembly 5. At the same time, due to the fluidity of the gas cavity, the cold air can further cool other components in the cavity (such as the stator 22, the rotor assembly 23, etc.), and the method of delivering cold air to the stator winding 21 is more targeted, and the area where the stator winding 21 is located can be cooled preferentially.

[0050] Reference Figure 1 , the vortex tube 4 is mounted on the end cover 1, and the vortex tube 4 is arranged on the outside of the end cover 1 (i.e., the side away from the cavity). The vortex tube 4 can be fixed to the end cover 1 by a connector (such as a bolt, etc.), and a mounting groove can be arranged on the end cover 1, and the vortex tube 4 can be embedded in the end cover 1 by an embedded manner to prevent the vortex tube 4 from shaking or falling off. The installation method of the vortex tube 4 is simple and has high reliability.

[0051] It should be noted that the installation method and specific layout position of the vortex tube 4 need to be designed in combination with the electrical device used by the motor cooling structure 100. Taking the electrical device as a vehicle as an example, the layout position of the vortex tube 4 needs to be convenient for matching the layout position and angle of the entire vehicle and optimizing the layout of components. Of course, the vortex tube 4 can also be set on the shell body, such as: a mounting structure for mounting and fixing the vortex tube 4 is set on the shell body, and the structure and position of the mounting structure are not specifically limited here.

[0052] Reference Figure 1 The gas supply device 3 can also be installed on the end cover 1 of the shell, and the gas supply device 3 is also arranged outside the cavity of the shell, so as to facilitate the connection and cooperation between the gas supply device 3 and the vortex tube 4.

[0053] In some embodiments of the present application, the hot air generated by the vortex tube 4 can be transported through a pipeline assembly to apply the hot air. When the motor cooling structure 100 is applied to a vehicle, the hot air generated by the vortex tube 4 can be transported to the air conditioning system and the battery heat exchange system of the vehicle through the pipeline assembly to utilize the heat of the hot air.

[0054] It should be noted that the hot gas in the present application can be further transported through the pipeline assembly to other systems in the electrical device used by the motor, so as to fully utilize the heat of the high-temperature gas.

[0055] In some embodiments of the present application, the gas circuit assembly 5 includes an air jet pipeline 51 and a connecting pipeline 53. The air jet pipeline 51 is arranged in the cavity, and the air jet pipeline 51 is provided with an air jet port 52. The air jet port 52 is used to deliver cold air to the axial end of the stator winding 21. The setting of the air jet port 52 makes the cold air delivery position more targeted, which can improve the cooling effect on the stator winding 21. The connecting pipeline 53 is connected between the air inlet end of the air jet pipeline 51 and the cold air outlet end of the vortex tube 4, and is used to deliver cold air to the air jet pipeline 51, so as to deliver cold air to the stator winding 21 through the air jet pipeline 51.

[0056] It should be noted that the air jet 52 is used to deliver cold air to one side of the stator winding 21, that is, the opening of the air jet 52 is arranged toward the axial end of the stator winding 21. The air jet 52 delivers cold air to the axial end of the stator winding 21 along the axial direction of the stator winding 21 to improve the accuracy of cold air delivery. The shape of the air jet 52 is not specifically limited here, and can be: a straight tube shape, a gradually expanding shape, etc. The size of the air jet 52 can be designed according to the size of the stator winding 21 to ensure the cold air delivery effect of the air jet pipeline 51.

[0057] Combination Figure 1 and Figure 2 When the vortex tube 4 is arranged on the outside of the end cover 1, the arrangement position of the vortex tube 4 is far away from the injection position of the injection pipeline 51. It is necessary to connect the cold air outlet end of the vortex tube 4 with the injection pipeline 51 through the connecting pipeline 53 to transport cold air to the injection pipeline 51.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, the shell includes an end cover 1, an air jet pipeline 51 cavity, and the air jet pipeline 51 is arranged on the side of the stator winding 21 away from the end cover 1 in the axial direction, and is used to transport cold air to the axial end of the stator winding 21 to cool the stator winding 21 and ensure the cooling effect of the end, which is beneficial to the heat dissipation of the motor under harsh working conditions such as low speed and high torque.

[0059] When the air jet pipeline 51 delivers cold air to one side of the stator winding 21, the cold air exchanges heat with the stator winding 21 to reduce the temperature of the stator winding 21. The cold air is delivered to one side of the axial end of the stator winding 21, so that the temperature of the end area of ​​the stator winding 21 is fully reduced, so that the motor can be in a relatively stable low temperature environment at the end of the winding, the rotor assembly 23 and the inner side of the end cover 1 for a long time, thereby ensuring the cooling reliability of the motor cooling structure 100.

[0060] Reference Figure 2It can be understood that the jet pipe 51 is arranged on the side of the stator winding 21 away from the end cover 1 in the axial direction, so that the jet pipe 51 can fully avoid the components in the motor (such as: stator 22, stator winding 21 and rotor assembly 23, etc.). At the same time, the above components are arranged between the jet pipe 51 and the end cover 1. When the jet pipe 51 delivers cold air to the side of the stator winding 21 (which is also the side of the end cover 1), the cold air can also cool the components between the end cover 1 and the jet pipe 51, so that the motor can be in a relatively stable low-temperature environment at the end of the winding, the rotor assembly 23 and the inner side of the end cover 1 for a long time, ensuring the cooling reliability of the motor cooling structure 100.

[0061] In some embodiments of the present application, the end cover 1 is provided with an exhaust channel 11, one end of the exhaust channel 11 is connected to the cavity, and the other end of the exhaust channel 11 forms a gas outlet for exhausting the gas in the cavity.

[0062] It is understandable that after the cold air is ejected through the jet pipe 51, the low-temperature gas (i.e., the cold air) exchanges heat with the components in the cavity, and the gas temperature rises. In the present application, the gas in the cavity can be discharged through the exhaust channel 11, so that the high-temperature gas in the cavity is discharged from the cavity, preventing the ambient temperature in the cavity from rising, and ensuring the cooling effect of the cold air on the components in the cavity.

[0063] Reference Figure 2 When the air jet pipeline 51 delivers cold air, the cold air is delivered to the stator winding 21 and the side of the end cover 1, that is, the cold air flows to the side of the end cover 1 after flowing through the high-temperature components in the cavity, and is discharged from the exhaust channel 11 at the end cover 1. Therefore, by arranging the air jet pipeline 51 on the side of the stator winding 21 away from the end cover 1 in the axial direction, it can be ensured that the cold air can flow to the side of the end cover 1 after exchanging heat with the stator winding 21, the rotor assembly 23 and other components, and be discharged from the cavity through the exhaust channel 11, thereby forming a gas flow path suitable for heat exchange with components in the motor.

[0064] Among them, the specific path of the gas flow path is: gas is transported to the vortex tube 4 through the gas supply device 3, and the vortex tube 4 transports cold air to the injection pipeline 51 through the connecting pipeline 53, and the injection pipeline 51 is toward the stator winding 21 and the end cover 1 side. The gas is discharged through the exhaust channel 11 after heat exchange with the stator winding 21 and other components.

[0065] In this way, cold air can be continuously delivered to the cavity of the motor, and the components in the motor can be cooled by air cooling to ensure the cooling effect, which is beneficial for the motor cooling structure 100 to dissipate heat under harsh working conditions such as low speed and high torque, and makes the stator winding 21, rotor assembly 23 and the inner side of the end cover 1 in the motor in a relatively stable low-temperature environment, thereby ensuring the cooling reliability of the motor cooling structure 100.

[0066] In other embodiments of the present application, the vortex tube 4 is arranged on the outside of the end cover 1, and the jet pipeline 51 passes through the end cover 1 and is connected to the jet pipeline 51 located in the cavity to transport the cold air of the vortex tube 4 to the jet pipeline 51.

[0067] In some embodiments of the present application, the connecting pipeline 53 includes a first pipe section 531 and a second pipe section 532 .

[0068] One end of the first pipe section 531 is connected to the cold air outlet end of the vortex tube 4 , the other end of the first pipe section 531 is connected to one end of the second pipe section 532 , and the other end of the second pipe section 532 is connected to the jet pipeline 51 .

[0069] Reference Figure 1 The first pipe section 531 is arranged on the outside of the end cover 1, the other end of the first pipe section 531 is connected to the end cover 1, and one end of the second pipe section 532 is connected to the end cover 1, and the first pipe section 531 is connected to the second pipe section 532. The first pipe section 531 is connected to the cold air outlet end of the vortex tube 4 to transport the cold air to the gas channel. The second pipe section 532 is arranged in the cavity to transport the cold air to the injection pipeline 51 through the second pipe section 532.

[0070] It can be understood that the first pipe segment 531 and the second pipe segment 532 are both connected to the end cover 1, and a gas channel can be formed on the end cover 1, and the two ends of the gas channel are respectively connected to the first pipe segment 531 and the second pipe segment 532 to connect the first pipe segment 531 and the second pipe segment 532.

[0071] When the vortex tube 4 is arranged outside the shell, the cold air needs to pass through the end cover 1 to be delivered to the injection pipeline 51. In the present application, the end cover 1 is provided with a gas channel for the cold air to pass through, and the connecting pipeline 53 is constructed into two sections (i.e., a first pipe section 531 and a second pipe section 532), the first pipe section 531 is connected between the air inlet end of the gas channel and the vortex tube 4, and the second pipe section 532 is connected between the air outlet end of the gas channel and the injection pipeline 51.

[0072] The cold air flows into the gas channel through the first pipe section 531, and flows into the jet pipe 51 after being discharged from the gas outlet of the gas channel, and is transported to one side of the stator winding 21 by the jet pipe 51. It can be understood that the cold air has a low temperature, and during the cold air transportation process, the cold air can also reduce the temperature of the connecting pipe 53 and the end cover 1.

[0073] It can be understood that, compared with the arrangement of passing the connecting pipe 53 through the end cover 1, constructing the connecting pipe 53 into multiple sections facilitates the assembly of the connecting pipe 53 and the end cover 1, and the multi-section pipe structure can be better adapted to the housing shape of the motor and the arrangement position of the stator winding 21.

[0074] like Figure 2 As shown, in some embodiments of the present application, the second tube segment 532 extends along the axial direction of the stator winding 21 .

[0075] Among them, the second pipe section 532 is connected between the end cover 1 and the air jet pipeline 51, and the air jet pipeline 51 is arranged on the side of the stator winding 21 away from the end cover 1 in the axial direction. The second pipe section 532 is extended in the axial direction of the stator winding 21 to ensure the air supply effect to the air jet pipeline 51. At the same time, the second pipe section 532 is constructed as a straight pipe, which has a simple structure and is easy to arrange. The arrangement in the axial direction can effectively prevent the second pipe section 532 from interfering with the components in the cavity. Preferably, the second pipe section 532 is spaced apart from the stator 22.

[0076] like Figure 2 As shown, in some embodiments of the present application, the motor cooling structure 100 further includes a connecting piece 6, which is sleeved on the second pipe segment 532, and is used to connect to the housing to fix the second pipe segment 532 to the housing.

[0077] The connecting piece 6 is provided with a through hole for the connecting piece to pass through, and the connecting piece is connected to the mounting hole provided on the housing through the through hole to fix the second pipe section 532 to the housing to prevent the second pipe section 532 from shaking relative to the housing and causing the connection to fall off or be damaged. It should be noted that the connecting piece can be a threaded connection component such as a bolt. The connection method of the bolt is simple and will not be described here.

[0078] Reference Figure 2 The connecting piece 6 is sleeved on the second pipe segment 532. The connecting piece 6 can limit the second pipe segment 532 in the radial direction, and the connecting piece 6 is adjustable relative to the second pipe segment 532 in the axial direction of the second pipe segment 532, so as to facilitate adjusting the connecting piece 6 to a position suitable for cooperating with the connecting structure on the shell, thereby reducing the difficulty of assembly.

[0079] In some embodiments of the present application, the jet pipeline 51 is fixedly connected to the shell to prevent the jet pipeline 51 from shaking relative to the stator assembly fixed in the shell, thereby ensuring the stability of the cold air transported by the jet pipeline 51.

[0080] It should be noted that the connection method between the jet pipeline 51 and the shell is not specifically limited here, and can be fixed by a connecting component (such as a bolt, etc.). The jet pipeline 51 can be connected to at least one of the end cover 1 and the shell body. Taking the connecting component as a bolt as an example, a connecting flange is provided on the jet pipeline 51, and a through hole is formed on the connecting flange. The through hole is used for the bolt to pass through, and a threaded hole structure that cooperates with the bolt thread is formed on the shell. The bolt cooperates with the threaded hole structure to fix the jet pipeline 51 to the shell.

[0081] like Figure 2 As shown, in some embodiments of the present application, the jet pipeline 51 and the stator winding 21 are opposite and spaced apart in the axial direction, the jet pipeline 51 is annular and has a plurality of jet ports 52, and the plurality of jet ports 52 are arranged in a circle and spaced apart in sequence.

[0082] Among them, the jet pipeline 51 is arranged relative to the stator assembly to improve the accuracy of the injection of cold air to the stator winding 21, enhance the effect of the jet pipeline 51 in transporting cold air to the axial end of the stator winding 21, and thereby ensure the cooling effect on the end of the stator winding 21.

[0083] It can be understood that the air jet pipeline 51 and the stator assembly are spaced apart in the axial direction to prevent interference between the air jet pipeline 51 and the stator assembly, thereby improving structural reliability.

[0084] It should be noted that the distance between the jet pipe 51 and the stator assembly is not specifically limited. The jet pipe 51 and the stator assembly need to be arranged adjacent to each other to ensure the effect of the jet pipe 51 in conveying cold air, and a gap needs to be reserved between the jet pipe 51 and the stator assembly to prevent interference between the components.

[0085] Furthermore, the annular jet pipe 51 can fully avoid the rotor assembly 23, which can prevent the jet pipe 51 from interfering with the rotor assembly 23, thereby improving the reliability of the motor cooling structure 100. At the same time, a plurality of jet ports 52 arranged at intervals in a circumference are provided on the jet pipe 51, and the plurality of jet ports 52 can be used to deliver cold air to the stator winding 21, thereby improving the uniformity of the jet pipe 51 delivering cold air to the stator winding 21.

[0086] The plurality of air jets 52 are evenly spaced and arranged on the air jet pipeline 51 to improve the uniformity of the air jet pipeline 51 in delivering cold air to the stator winding 21 .

[0087] like Figure 2 As shown, in some embodiments of the present application, the air circuit assembly 5 is provided with a plurality of air supply branches, the plurality of air supply branches are arranged in parallel, and the plurality of air supply branches respectively deliver cold air to the axial ends of the stator winding 21 , thereby cooling the plurality of stator windings 21 .

[0088] It can be understood that the motor is provided with multiple stators 22, and correspondingly, the motor is also provided with multiple rotor assemblies 23, and the multiple rotor assemblies 23 are arranged one-to-one with the multiple stators 22, and each set of stators and rotor assemblies 23 can be equivalent to a set of power modules, which is equivalent to integrating multiple sets of power modules in the housing of a motor. Among them, multiple sets of air supply branches arranged in parallel can cool the stators 22 in the motor, and can also cool other components in the motor.

[0089] It should be noted that the power module can be used for power generation and power recovery, or for power drive. Figure 2 The motor cooling structure 100 is provided with two groups of power modules. For example, the motor is applied to a vehicle, and the vehicle is a new energy hybrid vehicle. One power module is used for power drive, and the other power module is used for power generation and power recovery. Thus, cooling is respectively supplied to the multiple stator windings 21 through multiple air supply branches, so that the temperature inside the motor is uniformed and the influence of thermal interference is reduced.

[0090] In some embodiments of the present application, each air supply branch includes a set of the above-mentioned connecting pipes 53 and the jet pipes 51, the connecting pipes 53 are connected between the cold air outlet end of the vortex tube 4 and the jet pipes 51, the jet pipes 51 are arranged corresponding to the stator winding 21, and are used to deliver cold air to the stator winding 21.

[0091] The connecting pipeline 53 includes the first pipe section 531 and the second pipe section 532 mentioned above, so as to deliver cold air to the jet pipeline 51 through the cooperation of the first pipe section 531, the second pipe section 532 and the end cover 1.

[0092] Reference Figure 2 In a further embodiment of the present application, two jet pipelines 51 are arranged adjacent to each other, and the two jet pipelines 51 are connected by a connecting portion 54, so that the two jet pipelines 51 are fixed by the connecting portion 54, thereby improving the structural strength of the gas circuit assembly 5.

[0093] like Figure 2 As shown, the connecting portion 54 is configured as a connecting rod, which is connected between the two jet pipelines 51 , and the axial direction of the connecting rod is coplanar with the central axes of the two annular jet pipelines 51 to improve the structural reliability of the jet pipelines 51 .

[0094] like Figure 2 As shown, when no connection structure is provided on the jet pipeline 51, the jet pipeline 51 is connected to the end cover 1 through the second pipe section 532. At this time, the second pipe section 532 and the jet pipeline 51 are equivalent to a cantilever structure, and the connection reliability of the jet pipeline 51 relative to the shell is poor. In the present application, the jet pipelines 51 in two sets of air supply branches arranged in parallel are connected to improve the structural reliability of the air circuit assembly 5 on the jet pipeline 51 side.

[0095] Furthermore, after the second pipe section 532 is connected to the housing via the connecting piece 6 , the assembly reliability of the gas circuit assembly 5 and the housing can be further improved.

[0096] like Figure 2 As shown, in some embodiments of the present application, a plurality of stator windings 21 are arranged at intervals in the radial direction.

[0097] In some embodiments of the present application, the gas supply device 3 is an air compressor, which is used to compress air and transport the compressed gas to one side of the vortex tube 4.

[0098] Among them, the air compressor can be used to compress the air and transport the compressed air to one side of the vortex tube 4. The vortex tube 4 can convert the compressed gas into cold air and hot air. The cold air can be transported to the stator winding 21 through the air path component 5 to cool the stator winding 21.

[0099] Air compressors can obtain cooling media (i.e. air) from the external environment. The cooling media is environmentally friendly and renewable. Compared with oil cooling and liquid cooling solutions, it can reduce the cost of the media.

[0100] In some embodiments of the present application, the speed of the air compressor is adjustable to further adjust the air intake volume of the vortex tube per unit time, so that the motor cooling structure 100 can match the cooling requirements of different operating conditions.

[0101] In a further embodiment of the present application, the compression frequency of the air compressor is adjustable. By adjusting the speed of the air compressor to adjust the cooling air flow and temperature of the vortex tube 4, the cooling requirements of the motor under different load operating conditions can be matched, and the heat dissipation requirements of the motor under different operating conditions can be accurately controlled to ensure the normal operation of the motor.

[0102] It can be understood that when the motor is operating under a light load condition, a small flow of cold air can be delivered, allowing the air compressor to operate within a small speed range, ensuring that a certain amount of compressed air enters the vortex tube 4 and generates a sufficient amount of cold air, and the axial end of the stator winding 21 is forced to be cooled by air through the jet port 52 on the jet pipeline 51, so as to achieve the purpose of cooling the motor and increase the service life; when the motor is operating under a medium load condition, the air compressor operates within a normal speed range to ensure sufficient cooling; when the motor is operating under a heavy load condition, the air compressor operates within a high speed range to ensure the maximum amount of cold air, and to ensure that the motor cooling structure 100 has sufficient cooling capacity and cooling rate under low speed and high torque operation.

[0103] It should be noted that the above-mentioned "small load", "medium load" and "large load" are described in a relative comparison manner, the purpose of which is to reflect that the air compressor can operate at different speeds to provide compressed gas to the vortex tube 4, and while cooling the motor by air cooling, other cooling methods can also be combined to cool the motor, such as oil throwing cooling.

[0104] Furthermore, the air compressor is individually controlled to match the motor speed, different oil temperatures and different motor operating conditions.

[0105] Among them, in the motor cooling structure 100, the temperature of the cold air output by the vortex tube 4 can also be adjusted by adjusting the opening of the vortex tube 4, so as to facilitate matching the motor cooling structure 100 with the cooling requirements of the motor under different working conditions.

[0106] The motor cooling structure 100 according to the embodiment of the present application has at least the following technical effects:

[0107] (1) In the present application, the gas can be continuously delivered to the vortex tube 4 through the gas supply device 3, and the gas is separated into hot gas and cold gas through the vortex tube 4, and the dry cold gas is continuously delivered to the cavity to spray forced air cooling on the axial end of the stator winding 21, thereby ensuring the cooling effect on the stator winding 21, which is beneficial to the heat dissipation of the motor cooling structure 100 under low-speed and high-torque conditions.

[0108] At the same time, other components arranged in the cavity (such as the rotor assembly 23, etc.), the inner side of the end cover 1, etc. can be in a relatively stable low-temperature environment for a long time, ensuring the cooling reliability of the motor cooling structure 100.

[0109] (2) The vortex tube 4 can be fixed on the housing of the motor cooling structure 100, and the specific method can be screw connection, embedding, etc., so as to facilitate the matching of the layout position and layout angle with the whole vehicle and the optimization of component layout.

[0110] (3) The end cover 1 in the present application is provided with an exhaust channel 11, which is used to discharge the high-temperature gas in the cavity, and promote the uniformity of the temperature inside the cavity through the convection of cold air and hot air. At the same time, the gas outlet is arranged at the end cover 1, away from the core components of the motor (such as: stator 22, rotor, stator winding 21, etc.), to reduce the influence of thermal interference.

[0111] (4) The fixing method of the gas circuit assembly 5 and the matching method of the gas circuit assembly 5 and the end cover 1 in the present application are highly reliable, and the air injection pipeline 51 delivers cold air to one side of the stator winding 21 with good accuracy and uniformity.

[0112] (5) The gas supply device 3 is an air compressor, and the speed of the air compressor is adjustable. The flow rate and pressure of the compressed gas entering the vortex tube 4 can be adjusted by adjusting the speed of the air compressor, thereby controlling the speed and pressure of the cold air output by the air circuit component 5, which is convenient for adjusting the cold air flow rate and temperature of the vortex tube 4, so that the cooling performance of the motor cooling structure 100 can be adjusted in time according to the operating status of the motor.

[0113] According to the embodiment of the present application, the motor cooling system includes a motor and the above-mentioned motor cooling structure 100 , and the motor cooling structure 100 has a good cooling effect.

[0114] In some embodiments of the present application, the motor includes a shell, the shell has a cavity, the stator winding 21 is arranged in the cavity, and the shell includes an end cover 1, the gas supply device 3 and the vortex tube 4 are located outside the cavity and installed on the end cover 1, so as to facilitate the installation of the gas supply device 3 and the vortex tube 4.

[0115] In some embodiments of the present application, the end cover 1 is provided with an exhaust passage connected to the cavity, and the exhaust passage is provided at the upper position of the motor in the installation direction. The exhaust passage has a gas outlet, which is connected to the cavity and is used to discharge the gas in the cavity, and the gas outlet is provided at the upper position of the motor cooling structure 100 in the installation direction, so that the high-temperature gas absorbed at the end of the stator winding 21 can be separated from the internal cold air and discharged from the cavity by utilizing the characteristics of air thermal expansion and contraction.

[0116] Furthermore, the upward and downward convection of the cold air and the hot air inside the motor can promote the uniformity of the temperature inside the motor. At the same time, the gas outlet is arranged at the upper position of the end cover 1, so that the gas outlet can be far away from the core components of the motor (such as: stator 22, rotor, stator winding 21, etc.), reducing thermal interference.

[0117] In some embodiments of the present application, at least one vortex tube 4 is provided on the motor cooling structure 100. The number of vortex tubes 4 may be multiple, and the multiple vortex tubes 4 may be connected in parallel or independently provided. The scheme of increasing the number of vortex tubes 4 is an iterative scheme of the present patent.

[0118] The multiple vortex tubes 4 being connected in parallel means that the multiple vortex tubes 4 are supplied with compressed gas by the same air compressor; the multiple vortex tubes 4 being independently arranged means that the multiple vortex tubes 4 are supplied with gas by multiple gas supply devices 3 respectively.

[0119] According to the vehicle of the embodiment of the present application, the vehicle includes the above-mentioned motor cooling system, and the motor cooling system has a good cooling effect.

[0120] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0121] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0122] In the description of the present application, “plurality” means two or more.

[0123] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0124] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0126] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A motor cooling structure, It is characterized in that include: A gas supply device (3), wherein the gas supply device (3) is used to supply gas; a vortex tube (4), the vortex tube (4) being connected to the gas supply device (3) and used for separating the gas into cold gas and hot gas; and an air circuit component (5), wherein the air circuit component (5) is connected to the vortex tube (4) and is used to transport the cold air to the stator winding (21).

2. The motor cooling structure according to claim 1, It is characterized in that The gas circuit assembly (5) comprises: An air jet pipeline (51), wherein the air jet pipeline (51) is provided with an air jet port (52), and the air jet port (52) is used to transport cold air to the stator winding (21); and a connecting pipeline (53), wherein the connecting pipeline (53) is connected between the air inlet end of the jet pipeline (51) and the cold air outlet end of the vortex tube (4), and is used to transport the cold air to the jet pipeline (51).

3. The motor cooling structure according to claim 2, It is characterized in that The connecting pipeline (53) comprises: A first pipe section (531), one end of the first pipe section (531) being in communication with a cold air outlet end of the vortex tube (4); and a second pipe section (532), one end of the second pipe section (532) being connected to the other end of the first pipe section (531), and the other end of the second pipe section (532) being connected to the jet pipeline (51).

4. The motor cooling structure according to claim 3, It is characterized in that The second tube section (532) extends along the axial direction of the stator winding (21).

5. The motor cooling structure according to claim 2, It is characterized in that The air injection pipeline (51) and the stator winding (21) are arranged opposite to each other and spaced apart in the axial direction.

6. The motor cooling structure according to claim 5, It is characterized in that The jet pipeline (51) is annular and is provided with a plurality of jet ports (52), and the plurality of jet ports (52) are arranged in a circle at intervals.

7. The motor cooling structure according to claim 1, It is characterized in that The air circuit assembly (5) is provided with a plurality of air supply branches, and the plurality of air supply branches are arranged in parallel and respectively supply the cold air to the stator winding (21).

8. The motor cooling structure according to claim 1, It is characterized in that The gas supply device (3) is an air compressor, which is used to compress air and is suitable for conveying the compressed gas to the air inlet of the vortex tube (4).

9. The motor cooling structure according to claim 8, It is characterized in that The rotation speed of the air compressor is adjustable to adjust the air intake volume of the vortex tube per unit time.

10. A motor cooling system, It is characterized in that The invention comprises a motor and a motor cooling structure according to any one of claims 1 to 9.

11. The motor cooling system according to claim 10, It is characterized in that The motor comprises a housing, the stator winding is arranged in a cavity of the housing, and the vortex tube and / or the gas supply device are mounted on the housing and located outside the cavity.

12. The motor cooling system according to claim 11, It is characterized in that The shell comprises an end cover (1), and the air path assembly (5) comprises an air jet pipeline (51). The air jet pipeline (51) is arranged on a side of the stator winding (21) away from the end cover (1) in the axial direction, and is used to transport cold air to the axial end of the stator winding (21).

13. The motor cooling system according to claim 12, It is characterized in that The gas circuit assembly (5) further comprises a connecting pipe (53) connected between the cold air outlet end of the vortex tube (4) and the gas injection pipe (51), and the connecting pipe (53) comprises a first pipe section (531) arranged on the outside of the shell and a second pipe section (532) located in the cavity, the first pipe section (531) and the second pipe section (532) are respectively connected to the end cover (1), and the first pipe section (531) is in communication with the second pipe section (532).

14. The motor cooling system according to claim 12, It is characterized in that The end cover (1) is provided with an exhaust passage communicated with the cavity, and the exhaust passage is used for exhausting the gas in the cavity.

15. The motor cooling system according to claim 14, It is characterized in that The exhaust passage is arranged at an upper position of the motor in the installation direction.

16. A vehicle, It is characterized in that The motor cooling system comprises the motor cooling system as claimed in any one of claims 10 to 15.

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