Motor, electric driving device, electric driving system and electric equipment

Abstract

The utility model provides a motor, an electric driving device, an electric driving system and electric equipment, the motor comprises a first shell, a stator, a rotor and a rotating shaft, the first shell is provided with a stator cavity and a rotor cavity which are separated from each other, the stator is accommodated in the stator cavity, the rotor is accommodated in the rotor cavity, and a first air gap is formed between the rotor and the stator; the first air gap is located in the rotor cavity, the rotating shaft is coaxially connected with the rotor, a conveying channel is formed in the rotating shaft and used for circulating heat conduction gas, a through hole is formed in the shaft wall of the rotating shaft, and the through hole communicates with the first air gap and the conveying channel. According to the motor, the heat conduction gas is input into the first air gap through the conveying channel and the through hole in sequence, the heat conduction gas can directly absorb heat generated by the rotor in the working process, the cooling effect of the rotor is effectively improved, meanwhile, the resistance of the heat conduction gas acting on the rotor is small, the oil stirring loss of the rotor is effectively reduced, and the service life of the motor is prolonged. Therefore, the working performance of the motor is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor, an electric drive device, an electric drive system and an electric device. Background Art

[0002] With increasing environmental pollution, new energy products are gaining popularity. Electric drive systems, as the power source for these new energy products, convert battery-generated electrical energy into mechanical energy to power these products. Improving the performance of motors, the core components of electric drive systems, is a pressing technical challenge in electric drive technology. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a motor, an electric drive device, an electric drive system and an electric device to solve the technical problem of poor working performance of the motor in the related art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is to provide a motor, comprising:

[0005] a first housing having a stator cavity and a rotor cavity separated from each other;

[0006] a stator, accommodated in the stator cavity;

[0007] The rotor is accommodated in the rotor cavity, a first air gap is formed between the rotor and the stator, and the first air gap is located in the rotor cavity;

[0008] The rotating shaft is coaxially connected to the rotor, and a conveying channel is formed inside the rotating shaft. The conveying channel is used to circulate heat-conducting gas. A through hole is opened on the shaft wall of the rotating shaft, and the through hole connects the first air gap and the conveying channel to allow the heat-conducting gas to enter the first air gap.

[0009] The motor provided by the embodiment of the present application has at least the following beneficial effects: the motor provided by the embodiment of the present application inputs the heat-conducting gas into the first air gap through the delivery channel and the through hole in sequence, and the heat-conducting gas can directly absorb the heat generated by the rotor during operation, thereby effectively improving the cooling effect of the rotor. At the same time, compared with traditional liquid cooling media, the resistance of the heat-conducting gas acting on the rotor is smaller, effectively reducing the oil stirring loss of the rotor, thereby effectively improving the working performance of the motor.

[0010] In some embodiments of the present application, the stator cavity is used to accommodate a coolant, and at least a portion of the stator is immersed in the coolant.

[0011] By adopting the above technical solution, not only can the cooling effect of the stator be effectively improved, but also by circulating heat-conducting gas in the first air gap, the thermal resistance of the first air gap can be reduced, so that the heat generated by the rotor during operation can be conducted to the coolant in the stator cavity through the heat-conducting gas, further improving the cooling effect of the rotor, thereby further improving the working performance of the motor.

[0012] In some embodiments of the present application, the first housing has two stator cavities, which are located on opposite sides of the rotor cavity along the axial direction of the rotating shaft. There are two stators, which are located in the two stator cavities.

[0013] By adopting the above technical solution, not only the torque density and power density of the motor are effectively improved, but the coolant in the two stator cavities can also absorb the heat on the opposite sides of the rotor along the axial direction of the shaft, further improving the cooling effect of the rotor, thereby further improving the working performance of the motor.

[0014] In some embodiments of the present application, a first air gap is formed between the rotor and one stator, another first air gap is formed between the rotor and the other stator, the number of through holes is at least two, at least one through hole connects the conveying channel and a first air gap, and at least another through hole connects the conveying channel and another first air gap.

[0015] By adopting the above technical solution, heat-conducting gas can be simultaneously delivered to the two first air gaps to reduce the thermal resistance of the two first air gaps, so that the heat generated by the rotor during operation can be conducted to the coolant in the two stator cavities through the heat-conducting gas, further improving the cooling effect of the rotor, thereby further improving the working performance of the motor.

[0016] In some embodiments of the present application, the through hole is arranged opposite to the first air gap.

[0017] By adopting the above technical solution, the delivery path of the heat-conducting gas is effectively shortened, the delivery efficiency is effectively improved, the cooling effect of the rotor is further improved, and the working performance of the motor is further improved.

[0018] In some embodiments of the present application, there are multiple through holes, and the multiple through holes are arranged around the central axis of the rotating shaft.

[0019] By adopting the above technical solution, the heat-conducting gas can be transported into the first air gap more evenly, further improving the cooling effect of the rotor, thereby further improving the working performance of the motor.

[0020] In some embodiments of the present application, the motor further includes an air intake turbine, which is coaxially arranged and fixedly connected to the rotating shaft so as to draw the heat-conducting gas into the delivery channel during the rotation of the rotating shaft.

[0021] By adopting the above technical solution, the flow velocity of the heat-conducting gas in the conveying channel is effectively increased, the circulation efficiency of the heat-conducting gas is improved, the cooling effect of the rotor is further improved, and the working performance of the motor is further improved.

[0022] In some embodiments of the present application, the air-intake turbine includes a mounting ring and fan blades. The mounting ring is coaxially arranged and fixedly connected to the rotating shaft, and the fan blades are connected to the mounting ring.

[0023] By adopting the above technical solution, it is easy to connect the intake turbine to the rotating shaft, thereby effectively improving the assembly efficiency of the motor.

[0024] In some embodiments of the present application, the first housing also has an axial cavity for accommodating a rotating shaft, and the motor also includes at least two sealing components, which are arranged between the cavity wall of the axial cavity and the outer peripheral wall of the rotating shaft to seal the cavity wall of the axial cavity and the outer peripheral wall of the rotating shaft, and at least two sealing components are arranged on opposite sides of the rotor cavity along the axial direction of the rotating shaft.

[0025] By adopting the above technical solution, the rotor cavity is effectively sealed to reduce the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor, thereby further improving the working performance of the motor.

[0026] In some embodiments of the present application, the sealing component includes a first dynamic seal and a first static seal. The first dynamic seal is arranged on the outer peripheral wall of the rotating shaft, and the first static seal is arranged on the cavity wall of the shaft cavity. The first dynamic seal is sealed and connected to the first static seal.

[0027] By adopting the above technical solution, the cavity wall of the shaft cavity can be sealed and connected with the outer peripheral wall of the shaft during the rotation of the shaft, effectively sealing the rotor cavity, thereby reducing the risk of leakage of the heat-conducting gas.

[0028] In some embodiments of the present application, the sealing component also includes a first mounting seat and a first elastic member, the first mounting seat is connected to the outer peripheral wall of the rotating shaft, the first dynamic seal is installed on the first mounting seat, and the first elastic member is abutted between the first dynamic seal and the first mounting seat to push the first dynamic seal toward the first static seal.

[0029] By adopting the above technical solution, the first dynamic seal and the first static seal can be closely matched, effectively improving the sealing effect between the cavity wall of the shaft cavity and the outer peripheral wall of the rotating shaft, further reducing the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor, and thus further improving the working performance of the motor.

[0030] In some embodiments of the present application, the motor further includes an air intake connector for connecting the rotating shaft and the air supply device, the air intake connector having an air intake interface, and the air intake interface connects the conveying channel and the air supply port of the air supply device.

[0031] By adopting the above technical solution, it is convenient to connect the motor to the air supply device.

[0032] In some embodiments of the present application, the air intake connector includes a second dynamic seal and a second static seal, the second dynamic seal is connected to the rotating shaft, the second static seal is used to connect to the air supply device, the air intake interface is opened on the second static seal, and the second dynamic seal is sealed and connected to the second static seal.

[0033] By adopting the above technical solution, the connection between the rotating shaft and the air supply device can be sealed during the rotation of the rotating shaft, effectively reducing the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor, and thus further improving the working performance of the motor.

[0034] In some embodiments of the present application, the air intake connector also includes a second mounting seat and a second elastic member, the second mounting seat is connected to the rotating shaft, the second dynamic seal is installed on the second mounting seat, and the second elastic member is abutted between the second dynamic seal and the second mounting seat to push the second dynamic seal toward the second static seal.

[0035] By adopting the above technical solution, the second dynamic seal and the second static seal can be closely matched, effectively improving the sealing effect of the rotating shaft and the air supply device, further reducing the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor, and thus further improving the working performance of the motor.

[0036] In some embodiments of the present application, the first shell is provided with an air outlet, which is connected to the rotor cavity.

[0037] By adopting the above technical solution, the heat-conducting gas can be easily discharged to the outside of the first shell.

[0038] An embodiment of the present application further provides an electric drive device, comprising the motor described in any one of the above embodiments.

[0039] The electric drive device provided by the embodiments of the present application has at least the following beneficial effects: the electric drive device provided by the embodiments of the present application effectively improves the working performance of the electric drive device because it adopts the motor described in any of the above embodiments.

[0040] An embodiment of the present application further provides an electric drive system, comprising a battery and the above-mentioned electric drive device, wherein the battery is electrically connected to the motor.

[0041] The electric drive system provided by the embodiment of the present application has at least the following beneficial effects: the electric drive system provided by the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device.

[0042] An embodiment of the present application further provides an electric device, comprising the above-mentioned electric drive device or the above-mentioned electric drive system.

[0043] The electric device provided by the embodiment of the present application has at least the following beneficial effects: the electric device provided by the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device or the above-mentioned electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of the explosion structure of a battery provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of the structure of the electric drive device provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0049] Figure 5 for Figure 4 The cross-sectional structural diagram of the motor shown is along the AA line;

[0050] Figure 6 for Figure 5 A schematic structural diagram of the intake turbine in the motor shown;

[0051] Figure 7 for Figure 4 The diagram of the connection structure between the motor and the air supply device is shown.

[0052] Among them, the reference numerals in the figures are:

[0053] 1. Electric drive device;

[0054] 10. Motor; 11. First housing; 111. Stator cavity; 112. Rotor cavity; 113. Air gap; 1131. First air gap; 1132. Second air gap; 114. Shaft cavity; 115. Air outlet; 12. Stator; 13. Rotor; 14. Rotating shaft; 141. Delivery channel; 142. Through hole; 15. Intake turbine; 151. Mounting ring; 152. Fan blade; 16. Sealing member; 161. First dynamic seal; 162. First static seal; 17. Intake connector; 171. Second dynamic seal; 172. Second static seal; 1721. Intake connector; 20. Controller; 30. Speed ​​change mechanism; 40. Air supply device;

[0055] 2. Battery;

[0056] 21. Box body; 211. First part; 212. Second part;

[0057] 22. Battery cells;

[0058] 3. Vehicle body. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0060] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0061] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0062] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", and "tenth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", and "tenth" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0063] An electric motor is the power unit of an electric device, converting electrical energy into mechanical energy to drive the device. A motor typically consists of a stator, a rotor, and a shaft, which is coaxially connected to the rotor. During operation, current flows through the stator windings, generating a rotating magnetic field. This rotating magnetic field causes the rotor to rotate, driving the shaft. During this process, the changing magnetic field induces eddy currents in the rotor, which generate heat as they flow through the rotor, causing it to heat up.

[0064] In the related art, a cooling channel is formed inside the rotating shaft. By circulating cooling oil in the cooling channel, the heat generated by the rotor during operation can be transferred to the cooling oil through the rotating shaft to cool the rotor. However, the thermal resistance of the heat conduction path of this cooling method is large, and the cooling effect is poor. In order to improve the cooling effect of the rotor, a through hole is opened on the shaft wall of the rotating shaft. During the rotation of the rotor, the cooling oil in the cooling channel can be thrown onto the rotor through the through hole, so that the cooling oil can directly contact the rotor and absorb the heat generated by the rotor during operation. However, due to the high viscosity of the cooling oil, the rotation resistance of the rotor increases, and the oil stirring loss increases accordingly, resulting in a decrease in the performance of the motor.

[0065] In order to improve the performance of the motor, the motor provided in the embodiment of the present application sequentially inputs the heat-conducting gas into the first air gap through the delivery channel and the through hole. The heat-conducting gas can directly absorb the heat generated by the rotor during operation, thereby effectively improving the cooling effect of the rotor. At the same time, compared with traditional liquid cooling media, the resistance of the heat-conducting gas acting on the rotor is smaller, effectively reducing the oil stirring loss of the rotor, thereby effectively improving the working performance of the motor.

[0066] The technical solutions described in the embodiments of the present application are applicable to electric drive devices using motors and electric devices using electric drive devices. The electric devices may include, but are not limited to, vehicles, ships, spacecraft, and electric toys. Vehicles may be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include aircraft, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys.

[0067] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0068] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle includes a body 3, a battery 2, and an electric drive unit 1. The body 3 is the main supporting component of the vehicle and has an engine compartment and a passenger compartment. The engine compartment is used to accommodate the electric drive unit 1, and the passenger compartment is used to provide operating and seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is located at the front of the body 3, that is, the engine compartment is the front engine compartment. When the vehicle is a rear-wheel drive vehicle, the engine compartment is located at the rear of the body 3, that is, the engine compartment is the rear engine compartment. When the vehicle is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the body 3 and the rear engine compartment located at the rear of the body 3. The number of electric drive units 1 can be two, with two electric drive units 1 located in the front and rear engine compartments respectively. The battery 2 and the electric drive unit 1 together constitute the vehicle's electric drive system. The battery 2 can be located at the bottom, front, or rear of the vehicle and can be used to power the electric drive unit 1 to drive its operation. The electric drive device 1 is used to convert the electrical energy provided by the battery 2 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle.

[0069] See also Figure 2 , Figure 2This is an exploded diagram of a battery 2 provided in an embodiment of the present application. The battery 2 includes a housing 21 and a battery cell 22, with the battery cell 22 being housed within the housing 21. The housing 21 is used to provide a storage space for the battery cell 22, and the housing 21 can have a variety of structures. In some embodiments, the housing 21 can include a first portion 211 and a second portion 212, which cover each other and together define a storage space for the battery cell 22. The second portion 212 can be a hollow structure with one end open, and the first portion 211 can be a plate-like structure. The first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. The first portion 211 and the second portion 212 can also be hollow structures with one end open, with the open side of the first portion 211 covering the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. Of course, the box body 21 formed by the first part 211 and the second part 212 can be in various shapes, such as a cylinder, a cuboid, etc., which is not specifically limited here.

[0070] In some embodiments, the box 21 can be used as a part of the chassis structure of the vehicle. For example, part of the box 21 can become at least a part of the floor of the vehicle, or part of the box 21 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0071] Of course, in some embodiments, the battery 2 may not include the box body 21 , but rather a plurality of battery cells 22 may be electrically connected and formed into a whole through necessary fixing structures before being assembled into a vehicle.

[0072] The battery 2 may include multiple battery cells 22, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 22. The battery cells 22 may be directly connected in series, in parallel, or in a hybrid configuration, and the entire battery cell 22 may then be housed within the housing 21. Alternatively, the battery 2 may include multiple battery cells 22 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 21. The battery 2 may also include other functional components, such as a busbar for electrically connecting the multiple battery cells 22.

[0073] Each battery cell 22 may be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can be recharged to activate the active material after the battery cell 22 is discharged and can continue to be used. A primary battery cell refers to a battery cell 22 that cannot be recharged to activate the active material after the battery cell 22 has exhausted its electrical energy and can continue to be used. The battery cell 22 may also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 22 of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal prismatic battery cells, are not particularly limited in this application.

[0074] See also Figure 3 , Figure 3 Schematic diagram of the structure of the electric drive device 1 provided in an embodiment of the present application. The electric drive device 1 includes a motor 10, which is used to convert the electrical energy provided by the battery 2 into mechanical energy. The motor 10 can be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. In some embodiments, there are two motors 10, and the two motors 10 are coaxially arranged, that is, the central axes of the two motors 10 coincide with each other, and the "central axis" of the motor 10 refers to the axial center line of the rotating shaft 14 (or "rotor shaft") of the motor 10. As an example, the rotating shaft 14 of one motor 10 is connected to one of the left front wheel and the right front wheel of the vehicle, and the rotating shaft 14 of the other motor 10 is connected to the other of the left front wheel and the right front wheel of the vehicle, or, the rotating shaft 14 of one motor 10 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the rotating shaft 14 of the other motor 10 is connected to the other of the left rear wheel and the right rear wheel of the vehicle. During the operation of the electric drive device 1 , the rotational speeds of the two motors 10 may be the same, or the rotational speeds of the two motors 10 may be different.

[0075] Of course, in other embodiments, the number of motor 10 may also be one.

[0076] In some embodiments, the electric drive device 1 may further include a controller 20. The controller 20 is configured to convert the direct current output by the battery 2 into alternating current and transmit the alternating current to the motor 10. The controller 20 may also be configured to control the operation of the motor 10. For example, the controller 20 is configured to control the start / stop, speed, torque, etc. of the motor 10. In other words, the motor 10 and the battery 2 are both electrically connected to the controller 20. The direct current output by the battery 2 may be transmitted to the controller 20 via a current transmission path between the battery 2 and the controller 20. After the controller 20 converts the direct current into alternating current, the alternating current may be transmitted to the motor 10 via a current transmission path between the controller 20 and the motor 10 to drive the motor 10 to operate. At the same time, control signals from the controller 20 may be transmitted to the motor 10 via the current transmission path between the controller 20 and the motor 10. An operating status signal of the motor 10 may also be transmitted to the controller 20 via the current transmission path between the controller 20 and the motor 10, enabling the controller 20 to control the operation of the motor 10.

[0077] In some embodiments, the electric drive device 1 may further include a speed change mechanism 30, which is used to transmit the mechanical energy to the vehicle's wheels by changing the speed and torque of the motor 10. For example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by reducing the speed of the motor 10 and increasing the torque of the motor 10. In another example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by increasing the speed of the motor 10 and reducing the torque of the motor 10. The speed change mechanism 30 may be, but is not limited to, a pinion speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, or the like.

[0078] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0079] First, please refer to Figure 4 and Figure 5 , an embodiment of the present application provides a motor 10, comprising a first housing 11, a stator 12, a rotor 13 and a rotating shaft 14. The first housing 11 has a stator cavity 111 and a rotor cavity 112 separated from each other, the stator 12 is accommodated in the stator cavity 111, and the rotor 13 is accommodated in the rotor cavity 112. A first air gap 1131 is formed between the rotor 13 and the stator 12, and the first air gap 1131 is located in the rotor cavity 112. The rotating shaft 14 is coaxially connected to the rotor 13, and a conveying channel 141 is formed inside the rotating shaft 14. The conveying channel 141 is used to circulate heat-conducting gas. A through hole 142 is opened on the shaft wall of the rotating shaft 14, and the through hole 142 connects the first air gap 1131 and the conveying channel 141, so that the heat-conducting gas enters the first air gap 1131.

[0080] The first housing 11 is a component that provides a mounting environment for the stator 12 and rotor 13. At least a portion of this mounting environment constitutes the stator cavity 111, and at least another portion of this mounting environment constitutes the rotor cavity 112. The first housing 11 can be a one-piece component or an assembled component composed of multiple parts. The material of the first housing 11 can include, but is not limited to, aluminum, stainless steel, aluminum alloy, plastic, and the like.

[0081] In some embodiments, the motor 10 further includes a second housing (not shown), which is used to provide an internal environment for the motor 10, in which the first housing 11, the stator 12, the rotor 13 and the rotating shaft 14 are all housed. The second housing can be an integrally formed component or an assembled component assembled from multiple parts. As an example, in order to facilitate the assembly of the first housing 11, the stator 12, the rotor 13 and the rotating shaft 14 into the internal environment of the motor 10, the housing can include a second shell and an end cover, and the second shell defines the internal environment of the motor 10. The stator 12 can be installed in the stator cavity 111, the rotor 13 can be installed in the rotor cavity 112, and the rotor 13 can be connected to the rotating shaft 14. Then, the first housing 11, the stator 12, the rotor 13 and the rotating shaft 14 can be installed as a whole in the internal environment. After completing the assembly operation of the first housing 11, the stator 12, the rotor 13 and the rotating shaft 14, the end cover is placed on the opening of the second shell to isolate the internal environment of the motor 10 from the external environment of the motor 10. The material of the second housing may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0082] The stator 12 is the fixed portion of the motor 10 and is used to drive the rotor 13 to rotate. In some embodiments, the stator 12 may include an iron core and windings. The iron core is fixedly mounted within the stator cavity 111, and the windings are wound around the iron core. For example, the iron core has winding slots, and the windings are wound within the winding slots.

[0083] The rotor 13 is the rotating part of the motor 10. In some embodiments, the rotor 13 may include a retaining frame and permanent magnets, with the permanent magnets mounted on the retaining frame. For example, the retaining frame may have mounting slots, with the permanent magnets mounted within the mounting slots. There may be multiple permanent magnets, each disposed around the central axis of the rotating shaft 14. Accordingly, there may also be multiple mounting slots, with each permanent magnet corresponding to the mounting slot.

[0084] During the operation of the motor 10 , current may be input into the winding to generate a rotating magnetic field. The iron core is used to conduct the rotating magnetic field so that the rotating magnetic field acts on the rotor 13 , thereby driving the rotor 13 to rotate.

[0085] The stator 12 and rotor 13 are separated by an air gap 113. This air gap 113 prevents direct contact between the rotor 13 and stator 12, thereby reducing noise and mechanical damage caused by friction and wear. At least a portion of the air gap 113 is located within the rotor cavity 112 and forms the aforementioned first air gap 1131. At least another portion of the air gap 113 is located within the stator cavity 111 and forms the second air gap 1132. During operation of the motor 10, a heat-conducting gas flows through the first air gap 1131. The heat-conducting gas may be, but is not limited to, helium, nitrogen, or the like.

[0086] In some embodiments, the motor 10 is an axial flux motor, and the stator 12 and the rotor 13 are separated along the axis direction of the motor 10 to form the above-mentioned air gap 113.

[0087] The rotating shaft 14 is a component for outputting the rotational kinetic energy of the rotor 13. The rotating shaft 14 and the rotor 13 are coaxially connected, which means that the rotating shaft 14 is fixedly connected to the rotor 13, and the central axis of the rotating shaft 14 coincides with the central axis of the rotor 13.

[0088] In some embodiments, the motor 10 further includes a bearing, which is mounted on the second housing and sleeved on the rotating shaft 14. As an example, the number of the bearings can be two, and the two bearings are respectively disposed at opposite ends of the rotating shaft 14.

[0089] The delivery channel 141 provides a flow path for the heat-conducting gas. The delivery channel 141 can extend linearly or curvedly along the axis of the rotating shaft 14. A through hole 142 penetrates the wall of the rotating shaft 14. For example, the through hole 142 penetrates the wall of the rotating shaft 14 in the radial direction of the rotating shaft 14. The delivery channel 141, through hole 142, and first air gap 1131 are sequentially connected to form a flow path for the heat-conducting gas.

[0090] The motor 10 provided in the embodiment of the present application inputs the heat-conducting gas into the first air gap 1131 through the delivery channel 141 and the through hole 142 in sequence. The heat-conducting gas can directly absorb the heat generated by the rotor 13 during operation, thereby effectively improving the cooling effect of the rotor 13. At the same time, compared with traditional liquid cooling media, the resistance of the heat-conducting gas acting on the rotor 13 is smaller, effectively reducing the oil stirring loss of the rotor 13, thereby effectively improving the working performance of the motor 10.

[0091] In some embodiments of the present application, the stator cavity 111 is used to accommodate coolant, and at least a portion of the stator 12 is immersed in the coolant.

[0092] The coolant is a medium for absorbing the heat generated by the stator 12 and other heat-generating components. The coolant may be, but is not limited to, cooling oil, water, etc. The stator 12 may be partially immersed in the coolant or may be completely immersed in the coolant.

[0093] In some embodiments, the coolant can enter the stator cavity 111 during the circulation process. As an example, the first housing 11 is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the outlet end of the liquid supply device, and the liquid outlet is connected to the return end of the liquid supply device. The liquid supply device delivers coolant to the stator cavity 111 through the liquid inlet, and the coolant returns to the liquid supply device through the liquid outlet, so that the coolant circulates in the stator cavity 111.

[0094] Of course, in other embodiments, the coolant may also be statically placed in the stator cavity 111 .

[0095] By adopting the above technical solution, not only can the cooling effect of the stator 12 be effectively improved, but also by circulating heat-conducting gas in the first air gap 1131, the thermal resistance of the first air gap 1131 can be reduced, so that the heat generated by the rotor 13 during operation can be conducted to the coolant in the stator cavity 111 through the heat-conducting gas, thereby further improving the cooling effect of the rotor 13, thereby further improving the working performance of the motor 10.

[0096] In some embodiments of this application, please refer to Figure 5 The first housing 11 has two stator cavities 111 , which are located on opposite sides of the rotor cavity 112 along the axial direction of the rotating shaft 14 . There are two stators 12 , which are located in the two stator cavities 111 .

[0097] In some embodiments, the first housing 11 includes a first shell and two partitions. The first shell is the main body of the first shell 11 and is used to provide an installation environment for the stator 12 and the rotor 13. The two partitions are both connected to the first shell. Specifically, the two partitions are sealed with the first shell. The two partitions are separated along the axial direction of the rotating shaft 14 to form a rotor cavity 112. A stator cavity 111 is formed on the side of one partition away from the rotor cavity 112, and another stator cavity 111 is formed on the side of the other partition away from the rotor cavity 112. As an example, the partition and the first shell can be integrally molded components. For example, the partition and the first shell are integrally molded by an injection molding process. The partition and the first shell can also be molded separately and then connected to each other to form a whole.

[0098] In some embodiments, the two stator cavities 111 may be interconnected so that the coolant can circulate between the two stator cavities 111 .

[0099] Of course, in other embodiments, the two stator cavities 111 may not be connected to each other, that is, the coolant in one stator cavity 111 cannot directly enter the other stator cavity 111 .

[0100] By adopting the above technical solution, not only the torque density and power density of the motor 10 are effectively improved, but also the coolant in the two stator cavities 111 can respectively absorb the heat on the opposite sides of the rotor 13 along the axial direction of the rotating shaft 14, thereby further improving the cooling effect of the rotor 13 and further improving the working performance of the motor 10.

[0101] In some embodiments of this application, please refer to Figure 5 A first air gap 1131 is formed between the rotor 13 and one stator 12, and another first air gap 1131 is formed between the rotor 13 and the other stator 12. The number of through holes 142 is at least two, at least one through hole 142 connects the conveying channel 141 and a first air gap 1131, and at least another through hole 142 connects the conveying channel 141 and another first air gap 1131.

[0102] By adopting the above technical solution, heat-conducting gas can be simultaneously delivered to the two first air gaps 1131 to reduce the thermal resistance of the two first air gaps 1131, so that the heat generated by the rotor 13 during operation can be conducted to the coolant in the two stator cavities 111 through the heat-conducting gas, thereby further improving the cooling effect of the rotor 13 and further improving the working performance of the motor 10.

[0103] In some embodiments of this application, please refer to Figure 5 The through hole 142 is arranged opposite to the first air gap 1131 .

[0104] The through hole 142 and the first air gap 1131 are arranged opposite each other, meaning that along the radial direction of the rotating shaft 14, the projection of the through hole 142 at least partially overlaps with the projection of the first air gap 1131. As an example, the mid-vertical plane of the first air gap 1131 and the mid-vertical plane of the through hole 142 are both perpendicular to the central axis of the rotating shaft 14 and overlap with each other.

[0105] By adopting the above technical solution, the delivery path of the heat-conducting gas is effectively shortened, the delivery efficiency is effectively improved, and the cooling effect of the rotor 13 is further improved, thereby further improving the working performance of the motor 10.

[0106] In some embodiments of this application, please refer to Figure 5 There are multiple through holes 142 , and the multiple through holes 142 are arranged around the central axis of the rotating shaft 14 .

[0107] The number of through holes 142 can be determined according to actual application requirements, and can be 4, 6, 8, 10, etc.

[0108] The plurality of through holes 142 arranged around the central axis of the rotating shaft 14 means that the plurality of through holes 142 are distributed along the circumference of the rotating shaft 14. In some embodiments, the plurality of through holes 142 are evenly distributed along the circumference of the rotating shaft 14, that is, the distance between each two adjacent through holes 142 is equal along the circumference of the rotating shaft 14.

[0109] By adopting the above technical solution, the heat-conducting gas can be transported into the first air gap 1131 more evenly, thereby further improving the cooling effect of the rotor 13 and further improving the working performance of the motor 10.

[0110] In some embodiments of this application, please refer to Figure 5 and Figure 6 The motor 10 further includes an air intake turbine 15 , which is coaxially arranged and fixedly connected to the rotating shaft 14 so as to draw the heat-conducting gas into the delivery channel 141 during the rotation of the rotating shaft 14 .

[0111] The intake turbine 15 is a component for providing suction for the heat-conducting gas to enter the delivery channel 141. The intake turbine 15 is coaxially arranged and fixedly connected to the rotating shaft 14, which means that the central axis of the intake turbine 15 coincides with the central axis of the rotating shaft 14, and the intake turbine 15 is relatively fixed to the rotating shaft 14. Specifically, during the rotation of the rotating shaft 14, the intake turbine 15 rotates synchronously with the rotating shaft 14, so that an airflow is formed inside the delivery channel 141, flowing from the inlet end of the delivery channel 141 to the through hole 142, and the heat-conducting gas enters the delivery channel 141 driven by the airflow. The intake turbine 15 can be arranged at the inlet end of the delivery channel 141, or it can be arranged inside the delivery channel 141.

[0112] By adopting the above technical solution, the flow velocity of the heat-conducting gas in the delivery channel 141 is effectively improved, the circulation efficiency of the heat-conducting gas is improved, the cooling effect of the rotor 13 is further improved, and the working performance of the motor 10 is further improved.

[0113] In some embodiments of this application, please refer to Figure 6 The air-intake turbine 15 includes a mounting ring 151 and blades 152 . The mounting ring 151 is coaxially arranged and fixedly connected to the rotating shaft 14 , and the blades 152 are connected to the mounting ring 151 .

[0114] The mounting ring 151 is a component for connecting the fan blades 152 and the rotating shaft 14. In some embodiments, the shape of the mounting ring 151 is adapted to the shape of the rotating shaft 14. As an example, the rotating shaft 14 is a circular shaft, the mounting ring 151 is a circular ring, and the central axis of the rotating shaft 14 coincides with the central axis of the mounting ring 151. In some embodiments, the outer peripheral wall of the mounting ring 151 is interference fit with the inner peripheral wall of the conveying channel 141 so that the mounting ring 151 and the rotating shaft 14 are relatively fixed. Of course, in other embodiments, the mounting ring 151 can also be fixedly connected to the rotating shaft 14 by other connection methods, for example, the mounting ring 151 is welded to the rotating shaft 14, or for example, the mounting ring 151 is bonded to the rotating shaft 14.

[0115] The fan blades 152 are components for generating an airflow from the inlet end of the conveying channel 141 to the through hole 142. The fan blades 152 can be connected to the inner annular space of the mounting ring 151, or can be connected to one end of the mounting ring 151 along the axial direction of the rotating shaft 14. The fan blades 152 and the mounting ring 151 can be integrally formed components, for example, the fan blades 152 and the mounting ring 151 can be integrally formed using a casting process. The fan blades 152 and the mounting ring 151 can also be separately formed and then connected to form a whole, for example, the fan blades 152 and the mounting ring 151 can be separately formed and then welded to form a whole.

[0116] By adopting the above technical solution, it is easy to connect the intake turbine 15 to the rotating shaft 14, thereby effectively improving the assembly efficiency of the motor 10.

[0117] In some embodiments of this application, please refer to Figure 5 The first housing 11 also has a shaft cavity 114 for accommodating the rotating shaft 14. The motor 10 also includes at least two sealing components 16. The sealing components 16 are arranged between the cavity wall of the shaft cavity 114 and the outer peripheral wall of the rotating shaft 14 to seal the cavity wall of the shaft cavity 114 and the outer peripheral wall of the rotating shaft 14. At least two sealing components 16 are arranged on opposite sides of the rotor cavity 112 along the axial direction of the rotating shaft 14.

[0118] Shaft cavity 114 is used to accommodate shaft 14. It will be appreciated that at least a portion of shaft cavity 114 communicates with rotor cavity 112, thereby connecting rotor 13 to shaft 14. Sealing member 16 is used to isolate the connection between shaft cavity 114 and rotor cavity 112 from the external environment of first housing 11.

[0119] In some embodiments, the first housing 11 has two stator cavities 111, which are located on opposite sides of the rotor cavity 112 along the axial direction of the rotating shaft 14. The number of sealing components 16 is two, and the two sealing components 16 are located on opposite sides of the rotor cavity 112 along the axial direction of the rotating shaft 14.

[0120] In other embodiments, the first housing 11 has two rotor cavities 112, which are arranged on opposite sides of the stator cavity 111 along the axial direction of the rotating shaft 14. The number of sealing members 16 is four, two sealing members 16 are arranged on opposite sides of one rotor cavity 112 along the axial direction of the rotating shaft 14, and the other two sealing members 16 are arranged on opposite sides of the other rotor cavity 112 along the axial direction of the rotating shaft 14.

[0121] By adopting the above technical solution, the rotor cavity 112 is effectively sealed to reduce the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor 13, and thus further improving the working performance of the motor 10.

[0122] In some embodiments of this application, please refer to Figure 5 The sealing component 16 includes a first dynamic seal 161 and a first static seal 162. The first dynamic seal 161 is arranged on the outer peripheral wall of the rotating shaft 14, and the first static seal 162 is arranged on the cavity wall of the shaft cavity 114. The first dynamic seal 161 and the first static seal 162 are sealed and connected.

[0123] The first dynamic seal 161 is a component disposed on the outer peripheral wall of the rotating shaft 14 and rotates synchronously with the rotating shaft 14. The first dynamic seal 161 is made of a flexible material, which may include, but is not limited to, rubber, silicone, or the like. In some embodiments, the first dynamic seal 161 has an annular structure and is sleeved onto the rotating shaft 14. The first dynamic seal 161 can be directly connected to the rotating shaft 14, for example, by having an interference fit. The first dynamic seal 161 can also be connected to the rotating shaft 14 via other connecting components.

[0124] The first static seal 162 is a component that is relatively fixed to the first housing 11. The first static seal 162 is made of a flexible material, and the flexible material can be but is not limited to rubber, silicone, etc. In some embodiments, the first static seal 162 is an annular structure, and the first static seal 162 is sleeved on the rotating shaft 14 and separated from the rotating shaft 14. In some embodiments, the first static seal 162 is interference fit with the cavity wall of the shaft cavity 114. Of course, in other embodiments, the first static seal 162 can also be connected to the cavity wall of the shaft cavity 114 using other connection methods. For example, the first static seal 162 is bonded to the cavity wall of the shaft cavity 114.

[0125] It is understood that the first dynamic seal 161 and the first static seal 162 abut against each other to form a sealing interface. In some embodiments, the first dynamic seal 161 and the first static seal 162 abut against each other along the axis of the rotating shaft 14 to form a sealing interface perpendicular to the central axis of the rotating shaft 14.

[0126] By adopting the above technical solution, the cavity wall of the shaft cavity 114 can be sealed and connected with the outer peripheral wall of the rotating shaft 14 during the rotation of the rotating shaft 14, effectively sealing the rotor cavity 112, thereby reducing the risk of leakage of the heat transfer gas.

[0127] In some embodiments of the present application, the sealing component 16 also includes a first mounting seat (not shown in the figure) and a first elastic member (not shown in the figure), the first mounting seat is connected to the outer peripheral wall of the rotating shaft 14, the first dynamic seal 161 is installed on the first mounting seat, and the first elastic member is abutted between the first dynamic seal 161 and the first mounting seat to push the first dynamic seal 161 toward the first static seal 162.

[0128] The first mounting seat is a component used to support the first dynamic seal 161. In some embodiments, the first mounting seat is annular and is sleeved around and fixedly connected to the rotating shaft 14. The connection between the first mounting seat and the rotating shaft 14 may be, but is not limited to, an interference fit, welding, or adhesive bonding. The first dynamic seal 161 is mounted on the first mounting seat. It is understood that the first dynamic seal 161 can move relative to the first mounting seat and simultaneously rotate with the rotating shaft 14.

[0129] The first elastic member is a component used to provide an elastic force to push the first dynamic seal 161 toward the first static seal 162. The first elastic member may be, but is not limited to, a spring, a spring, or the like. In some embodiments, the first dynamic seal 161 and the first static seal 162 abut against each other along the axis of the rotating shaft 14. The first dynamic seal 161 is movable relative to the first mounting seat along the axis of the rotating shaft 14. The first elastic member abuts between the first mounting seat and the first dynamic seal 161 to provide an elastic force along the axis of the rotating shaft 14 to the first dynamic seal 161, thereby pushing the first dynamic seal 161 toward the first static seal 162 along the axis of the rotating shaft 14.

[0130] By adopting the above technical solution, the first dynamic seal 161 and the first static seal 162 can be closely matched, effectively improving the sealing effect between the cavity wall of the shaft cavity 114 and the outer peripheral wall of the rotating shaft 14, further reducing the risk of leakage of the heat-conducting gas, and further improving the cooling effect of the rotor 13, thereby further improving the working performance of the motor 10.

[0131] In some embodiments of this application, please refer to Figure 5 and Figure 7 The motor 10 further includes an air intake connector 17 for connecting the rotating shaft 14 and the air supply device 40 . The air intake connector 17 has an air intake interface 1721 . The air intake interface 1721 communicates with the delivery channel 141 and the air supply port of the air supply device 40 .

[0132] The air inlet connector 17 is a component used to connect the rotating shaft 14 and the air supply device 40. The heat-conducting gas can enter the delivery channel 141 from the air supply port of the air supply device 40 through the air inlet interface 1721. Specifically, the air inlet interface 1721 and the air supply port of the air supply device 40 can be connected by an air pipe, that is, one end of the air pipe is connected to the air inlet interface 1721, and the other end of the air pipe is connected to the air supply port of the air supply device 40.

[0133] By adopting the above technical solution, it is convenient to connect the motor 10 to the air supply device 40.

[0134] In some embodiments of this application, please refer to Figure 5 and Figure 7 The air intake joint 17 includes a second dynamic seal 171 and a second static seal 172. The second dynamic seal 171 is connected to the rotating shaft 14. The second static seal 172 is used to connect to the air supply device 40. The air intake interface 1721 is opened on the second static seal 172. The second dynamic seal 171 is sealed and connected to the second static seal 172.

[0135] The second dynamic seal 171 is connected to the rotating shaft 14 and rotates synchronously with the rotating shaft 14. The second dynamic seal 171 is made of a flexible material, which may include, but is not limited to, rubber, silicone, etc. In some embodiments, the second dynamic seal 171 has an annular structure and is sleeved on the rotating shaft 14. The second dynamic seal 171 can be directly connected to the rotating shaft 14, for example, by having an interference fit. The second dynamic seal 171 can also be connected to the rotating shaft 14 via other connecting components.

[0136] The second static seal 172 is a component fixed relative to the air supply device 40. The second static seal 172 is made of a flexible material, which may include, but is not limited to, rubber, silicone, or the like. In some embodiments, the air inlet port 1721 is connected to the air supply port of the air supply device 40 via an air pipe, to which the second static seal 172 is fixedly connected.

[0137] It is understood that the second dynamic seal 171 and the second static seal 172 abut against each other to form a sealing interface. In some embodiments, the second dynamic seal 171 and the second static seal 172 abut against each other along the axis of the rotating shaft 14 to form a sealing interface perpendicular to the central axis of the rotating shaft 14.

[0138] By adopting the above technical solution, the connection between the rotating shaft 14 and the air supply device 40 can be sealed during the rotation of the rotating shaft 14, effectively reducing the risk of leakage of the heat-conducting gas, further improving the cooling effect of the rotor 13, and thus further improving the working performance of the motor 10.

[0139] In some embodiments of the present application, the air intake connector 17 also includes a second mounting seat (not shown in the figure) and a second elastic member (not shown in the figure), the second mounting seat is connected to the rotating shaft 14, the second dynamic seal 171 is installed on the second mounting seat, and the second elastic member abuts between the second dynamic seal 171 and the second mounting seat to push the second dynamic seal 171 toward the second static seal 172.

[0140] The second mounting seat is a component used to support the second dynamic seal 171. In some embodiments, the second mounting seat is annular and is sleeved around and fixedly connected to the rotating shaft 14. The connection between the second mounting seat and the rotating shaft 14 may be, but is not limited to, an interference fit, welding, or adhesive bonding. The second dynamic seal 171 is mounted on the second mounting seat. It is understood that the second dynamic seal 171 can move relative to the second mounting seat and simultaneously rotate with the rotating shaft 14.

[0141] The second elastic member is a component used to provide an elastic force to push the second dynamic seal 171 toward the second static seal 172. The second elastic member may be, but is not limited to, a spring, a spring, or the like. In some embodiments, the second dynamic seal 171 and the second static seal 172 abut against each other along the axis of the rotating shaft 14. The second dynamic seal 171 is movable relative to the second mounting seat along the axis of the rotating shaft 14. The second elastic member abuts between the second mounting seat and the second dynamic seal 171 to provide an elastic force along the axis of the rotating shaft 14 to the second dynamic seal 171, thereby pushing the second dynamic seal 171 toward the second static seal 172 along the axis of the rotating shaft 14.

[0142] By adopting the above technical solution, the second dynamic seal 171 and the second static seal 172 can be closely matched, effectively improving the sealing effect of the rotating shaft 14 and the air supply device 40, further reducing the risk of leakage of the heat-conducting gas, and further improving the cooling effect of the rotor 13, thereby further improving the working performance of the motor 10.

[0143] In some embodiments of this application, please refer to Figure 5 and Figure 7 The first shell 11 defines an air outlet 115 , which is connected to the rotor cavity 112 .

[0144] It can be understood that the heat-conducting gas in the rotor cavity 112 can be discharged to the outside of the first housing 11 through the gas outlet 115 .

[0145] In some embodiments, the air outlet 115 is connected to the air return port of the air supply device 40. As an example, the air outlet 115 and the air return port of the air supply device 40 are connected via an air return pipe, i.e., one end of the air return pipe is connected to the air outlet 115, and the other end of the air return pipe is connected to the air return port of the air supply device 40. The air supply device 40 inputs heat-conducting gas into the delivery channel 141, and the heat-conducting gas enters the first air gap 1131 through the through hole 142. After the heat-conducting gas flows through the first air gap 1131, it flows back to the air supply device 40 through the air outlet 115. After heat exchange and cooling in the air supply device 40, the heat-conducting gas is input into the delivery channel 141 again. This cycle is repeated so that the heat-conducting gas circulates between the motor 10 and the air supply device 40.

[0146] By adopting the above technical solution, the heat-conducting gas can be easily discharged to the outside of the first shell 11 .

[0147] Second, see Figure 3 , an embodiment of the present application provides an electric drive device 1, comprising the motor 10 described in any of the above embodiments.

[0148] The electric drive device 1 provided in the embodiment of the present application effectively improves the working performance of the electric drive device 1 because it adopts the motor 10 described in any of the above embodiments.

[0149] Thirdly, please refer to Figure 1 An embodiment of the present application provides an electric drive system, including a battery 2 and the above-mentioned electric drive device 1, where the battery 2 is electrically connected to the motor 10.

[0150] The electric drive system provided in the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device 1.

[0151] For the fourth aspect, please refer to Figure 1 , an embodiment of the present application provides an electric device, including the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0152] The electric device provided in the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0153] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A motor, characterized in that: The motor comprises: a first housing having a stator cavity and a rotor cavity separated from each other; a stator, accommodated in the stator cavity; a rotor accommodated in the rotor cavity, wherein a first air gap is formed between the rotor and the stator, and the first air gap is located in the rotor cavity; A rotating shaft is coaxially connected to the rotor, a conveying channel is formed inside the rotating shaft, the conveying channel is used to circulate heat-conducting gas, and a through hole is opened on the shaft wall of the rotating shaft, the through hole connects the first air gap and the conveying channel, so that the heat-conducting gas enters the first air gap.

2. The motor according to claim 1, wherein The stator cavity is used to accommodate cooling liquid, and at least a portion of the stator is immersed in the cooling liquid.

3. The motor according to claim 2, characterized in that The first housing has two stator cavities, which are respectively arranged on opposite sides of the rotor cavity along the axial direction of the rotating shaft. There are two stators, which are respectively arranged in the two stator cavities.

4. The motor according to claim 3, wherein A first air gap is formed between the rotor and one of the stators, another first air gap is formed between the rotor and the other stator, the number of the through holes is at least two, at least one of the through holes connects the conveying channel and one of the first air gaps, and at least another of the through holes connects the conveying channel and another of the first air gaps.

5. The motor according to any one of claims 1 to 4, characterized in that The through hole is arranged opposite to the first air gap.

6. The motor according to any one of claims 1 to 4, characterized in that There are multiple through holes, and the multiple through holes are arranged around the central axis of the rotating shaft.

7. The motor according to any one of claims 1 to 4, characterized in that The motor further includes an air intake turbine, which is coaxially arranged with and fixedly connected to the rotating shaft so as to draw the heat-conducting gas into the delivery channel during the rotation of the rotating shaft.

8. The motor according to claim 7, characterized in that The air-intake turbine includes a mounting ring and fan blades. The mounting ring is coaxially arranged with the rotating shaft and fixedly connected thereto. The fan blades are connected to the mounting ring.

9. The motor according to any one of claims 1 to 4, characterized in that The first housing also has an axial cavity for accommodating the rotating shaft, and the motor also includes at least two sealing components, which are arranged between the cavity wall of the axial cavity and the outer peripheral wall of the rotating shaft to seal the cavity wall of the axial cavity and the outer peripheral wall of the rotating shaft. At least two of the sealing components are arranged on opposite sides of the rotor cavity along the axial direction of the rotating shaft.

10. The motor according to claim 9, wherein The sealing component includes a first dynamic seal and a first static seal. The first dynamic seal is arranged on the outer peripheral wall of the rotating shaft, and the first static seal is arranged on the cavity wall of the shaft cavity. The first dynamic seal is sealed to the first static seal.

11. The motor according to claim 10, wherein The sealing component also includes a first mounting seat and a first elastic member, the first mounting seat is connected to the outer peripheral wall of the rotating shaft, the first dynamic seal is installed on the first mounting seat, and the first elastic member abuts between the first dynamic seal and the first mounting seat to push the first dynamic seal toward the first static seal.

12. The motor according to any one of claims 1 to 4, characterized in that The motor further comprises an air intake joint for connecting the rotating shaft and the air supply device, wherein the air intake joint has an air intake interface, and the air intake interface is connected to the conveying channel and the air supply port of the air supply device.

13. The motor according to claim 12, wherein: The air inlet joint includes a second dynamic seal and a second static seal, the second dynamic seal is connected to the rotating shaft, the second static seal is used to connect to the air supply device, the air inlet interface is opened on the second static seal, and the second dynamic seal is sealed and connected to the second static seal.

14. The motor according to claim 13, wherein The air inlet joint also includes a second mounting seat and a second elastic member, the second mounting seat is connected to the rotating shaft, the second dynamic seal is installed on the second mounting seat, and the second elastic member abuts between the second dynamic seal and the second mounting seat to push the second dynamic seal toward the second static seal.

15. The motor according to any one of claims 1 to 4, characterized in that The first shell is provided with an air outlet, and the air outlet is connected to the rotor cavity.

16. An electric drive device, characterized in that: The electric drive device comprises the motor according to any one of claims 1-15.

17. An electric drive system, characterized in that: The electric drive system includes a battery and the electric drive device according to claim 16 , wherein the battery is electrically connected to the motor.

18. An electric device, characterized in that: The electric device includes the electric drive apparatus according to claim 16 or the electric drive system according to claim 17 .

Images