Motor cooling system

Abstract

This application provides a motor cooling system, specifically relating to the field of motor cooling technology. It includes an air-cooled housing, a motor housing, and a gas delivery device. The outer surface of the air-cooled housing has several film cooling holes. The motor housing is located inside the air-cooled housing, and a flow-guiding cavity is formed between the motor housing and the air-cooled housing, communicating with the film cooling holes. The gas delivery device is connected to the flow-guiding cavity and is used to deliver cooling gas to the flow-guiding cavity, so that the cooling gas forms a cooling film on the outer surface of the air-cooled housing through the film cooling holes. By setting the film cooling holes and the flow-guiding cavity, the heat transfer path between the external high-temperature environment and the motor housing is blocked. The air-cooled housing and the cooling film prevent external heat convection from directly acting on the motor housing, avoiding motor component failure due to overheating. Simultaneously, the convective heat exchange between the cooling gas and the inner wall of the air-cooled housing and the outer wall of the motor housing within the flow-guiding cavity further removes heat, improving the motor's operating capability in high-temperature environments and extending the motor's service life.

Description

Technical Field

[0001] This application relates to the field of motor cooling technology, and more particularly to a motor cooling system. Background Technology

[0002] Currently, electric motors, as core power equipment, are widely used in many fields such as industrial production, transportation, and aerospace. However, in extreme scenarios such as near metallurgical furnaces, deep geothermal well drilling, near gas turbines, and in the reentry capsule of spacecraft, the ambient temperature can reach hundreds or even thousands of degrees Celsius. The intense heat radiation and convective heat transfer can cause traditional motors to heat up rapidly. Once the temperature exceeds the allowable operating temperature of key components such as insulation materials, permanent magnets, and bearings, it will directly cause a decrease in motor efficiency, damage to components, or even burnout of the entire machine.

[0003] Currently, the mainstream motor cooling methods mainly include air cooling and liquid cooling. Air cooling uses heat dissipation fins on the motor casing or a fan to force heat dissipation through convection. Liquid cooling (such as water cooling and oil cooling) removes heat through convection of a fluid medium, which is more efficient.

[0004] However, among current motor cooling methods, air cooling has a simple structure, but in extremely high-temperature environments, the cooling air itself is too hot, limiting its cooling capacity. Furthermore, it may accelerate the transfer of external heat to the motor housing through the heat sink fins. Liquid cooling systems are complex and heavy, posing risks of leakage and environmental damage. Moreover, the stability of liquid media at high temperatures is poor, making them prone to vaporization and expansion, which can affect heat dissipation and even damage the motor. In addition, traditional cooling methods primarily focus on dissipating heat generated inside the motor, offering limited insulation against external extreme heat sources, particularly radiant heat. Summary of the Invention

[0005] This application provides a motor cooling system. By incorporating air film vents and a flow guiding cavity, the heat transfer path between the external high-temperature environment and the motor housing is blocked. The formed cooling air film covers the surface of the air-cooled housing, preventing external convective heat transfer from directly affecting the motor housing, thereby avoiding overheating failure of internal motor components. Simultaneously, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled housing and the outer wall of the motor housing within the flow guiding cavity. This significantly improves the motor's operating capability under extreme high-temperature environments, extends its service life, and enhances operational reliability.

[0006] This application provides an embodiment of a motor cooling system, including:

[0007] The air-cooled housing has several air film pores on its outer surface;

[0008] The motor housing is located inside the air-cooled housing, and a flow guide cavity is formed between the motor housing and the air-cooled housing. The flow guide cavity is connected to the air film vent.

[0009] A gas delivery device is connected to a flow guide cavity and is used to deliver cooling gas to the flow guide cavity so that the cooling gas forms a cooling gas film on the outer surface of the air-cooled shell through the gas film holes.

[0010] The motor cooling system provided in this application includes an air-cooled housing, a motor housing, and a gas delivery device. The outer surface of the air-cooled housing has several film cooling holes. The motor housing is located inside the air-cooled housing, and a flow-guiding cavity is formed between the motor housing and the air-cooled housing, which is connected to the film cooling holes. The gas delivery device is connected to the flow-guiding cavity and is used to deliver cooling gas to the flow-guiding cavity, so that the cooling gas forms a cooling film on the outer surface of the air-cooled housing through the film cooling holes. Thus, the motor cooling system provided in this application, by setting the film cooling holes and the flow-guiding cavity, blocks the heat transfer path between the external high-temperature environment and the motor housing. The formed cooling film covers the surface of the air-cooled housing, preventing external heat convection from directly acting on the motor housing, thereby avoiding overheating failure of internal motor components. Simultaneously, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled housing and the outer wall of the motor housing within the flow-guiding cavity. This significantly improves the motor's operating capability in extreme high-temperature environments, extends the motor's service life, and improves operational reliability.

[0011] In one possible implementation, the air-cooled housing has a housing end face and a housing side wall, and on the housing end face of the air-cooled housing, air film holes are arranged on at least one distribution circle centered on the motor axis.

[0012] On the side wall of the air-cooled housing, the air film pores are arranged in layers along the motor axis to form at least one layer of air film pores distributed circumferentially.

[0013] In one possible implementation, on the end face of the housing, the projection of the outlet of any air film hole onto the end face of the housing forms an angle with the line connecting the location of the air film hole and the center of the circle.

[0014] On the side wall of the housing, the projection direction of the outlet of any air film hole in the circumferential direction of the side wall of the housing forms an angle with the central axis of the motor.

[0015] In one possible implementation, the axial direction of the air film hole is inclined at an angle of 30° to 60° to the surface of the air-cooled housing.

[0016] In one possible implementation, the outlet of the air film orifice includes any one of a straight-through type, a trumpet-shaped type, or a fan-shaped structure.

[0017] In one possible implementation, a turbulence structure is provided at the outlet of the air film hole. The turbulence structure protrudes from the outer surface of the air-cooled shell and includes any one of the following: spherical, teardrop-shaped, conical, rhomboid, or spindle-shaped structures.

[0018] In one possible implementation, it further includes: a high-pressure gas source connected to a gas delivery device for providing cooling gas.

[0019] In one possible implementation, the gas delivery device includes: a gas source interface, which is located at one end of the motor and connected to a high-pressure gas source;

[0020] The motor has a motor shaft, and the hollow structure inside the motor shaft forms an air collecting chamber, which is connected to the air source interface.

[0021] The motor shaft is also equipped with an air guide hole, which is used to connect the air collection chamber and the flow guide chamber.

[0022] In one possible implementation, the hollow structure inside the motor shaft is further provided with an energy storage structure, which is an energy storage chamber filled with high-pressure gas or a mechanical energy storage device.

[0023] In one possible implementation, it further includes: a control system, the control system comprising:

[0024] Temperature sensors are used to monitor the temperature of motors or air-cooled housings;

[0025] The controller is connected to the temperature sensor;

[0026] A pressure regulating valve is installed in the gas circuit and connected to the controller to regulate the pressure or flow rate of the cooling gas according to the controller's instructions.

[0027] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the motor cooling system provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional schematic diagram of the motor structure of the motor cooling system provided in the embodiments of this application;

[0030] Figure 2 A schematic diagram of the hole distribution on the air-cooled housing of the motor cooling system provided in this application embodiment;

[0031] Figure 3 A schematic diagram of the hole distribution on the end face of the air-cooled housing of the motor cooling system provided in this application embodiment;

[0032] Figure 4 A schematic diagram of the hole distribution on the side wall of the air-cooled housing of the motor cooling system provided in this application embodiment;

[0033] Figure 5 A schematic diagram showing the structure of the air film vents of the motor cooling system provided in this application embodiment, with the vents at a certain angle.

[0034] Figure 6 A schematic diagram showing the various shapes of the outlet of the air film vent of the motor cooling system provided in the embodiments of this application;

[0035] Figure 7 A schematic diagram of a motor cooling system with a turbulence-inducing structure in the film cooling holes provided in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the control system of the motor cooling system provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 - Motor cooling system;

[0039] 200 - Air-cooled outer shell; 210 - Film cooling vent; 211 - Turbulence structure; 220 - Cooling film; 230 - Shell end face; 240 - Shell side wall;

[0040] 300 - Motor housing; 310 - Flow guide cavity;

[0041] 400 - Gas delivery device; 410 - Gas source interface;

[0042] 500-High-pressure air source;

[0043] 600 - Motor shaft; 610 - Gas collection chamber; 620 - Air guide hole; 630 - Energy storage structure;

[0044] 700 - Control system; 710 - Temperature sensor; 720 - Controller; 730 - Pressure regulating valve. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] As described in the background section, among current motor cooling methods, air cooling has a simple structure, but in extremely high-temperature environments, the cooling air itself is too hot, limiting its cooling capacity. Furthermore, it may accelerate the transfer of external heat to the motor housing through the heat sink fins. Liquid cooling systems are complex and heavy, posing risks of leakage and environmental damage. Moreover, the stability of liquid media at high temperatures is poor, making them prone to vaporization and expansion, which can affect heat dissipation and even damage the motor. In addition, traditional cooling methods primarily focus on dissipating heat generated inside the motor, offering limited insulation against external extreme heat sources, particularly radiant heat.

[0047] To address the aforementioned technical problems, this application provides a motor cooling system. The motor cooling system includes an air-cooled housing, a motor housing, and a gas delivery device. The outer surface of the air-cooled housing has several film cooling holes. The motor housing is located inside the air-cooled housing, and a flow-guiding cavity is formed between the motor housing and the air-cooled housing, communicating with the film cooling holes. The gas delivery device is connected to the flow-guiding cavity and is used to deliver cooling gas to the flow-guiding cavity, allowing the cooling gas to form a cooling film on the outer surface of the air-cooled housing through the film cooling holes. Thus, the motor cooling system provided in this application, by setting up film cooling holes and a flow-guiding cavity, blocks the heat transfer path between the external high-temperature environment and the motor housing. The formed cooling film covers the surface of the air-cooled housing, preventing external convective heat transfer from directly acting on the motor housing, thereby avoiding overheating failure of internal motor components. Simultaneously, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled housing and the outer wall of the motor housing within the flow-guiding cavity. This significantly improves the motor's operating capability under extreme high-temperature environments, extends the motor's service life, and enhances operational reliability.

[0048] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0049] This application provides a motor cooling system. By setting up air film holes and a guide cavity, the heat transfer path between the external high-temperature environment and the motor casing is blocked. The formed cooling air film covers the surface of the air-cooled casing, preventing external convective heat transfer from directly acting on the motor casing, thereby avoiding overheating failure of internal motor components. Simultaneously, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled casing within the guide cavity. This significantly improves the motor's thermal management capability under extreme high-temperature environments, extends the motor's service life, and enhances operational reliability. The specific structure of a motor cooling system provided in this application embodiment is described below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] refer to Figure 1 as well as Figure 2 This application provides a motor cooling system 100. The motor cooling system 100 may include an air-cooled housing 200 and a motor housing 300. In one possible implementation, combined with... Figure 2 As can be seen, both the air-cooled housing 200 and the motor housing 300 can be cylindrical structures, and this embodiment of the application is not limited thereto. In this embodiment of the application, the motor housing 300 can be located inside the air-cooled housing 200, and a guide cavity 310 can be formed between the motor housing 300 and the air-cooled housing 200.

[0051] Continue to refer to Figure 2 Based on the above embodiments, in one possible implementation, the outer surface of the air-cooled housing 200 may be provided with air film holes 210, and the number of air film holes 210 may be several, which is not limited in this application embodiment. In this application embodiment, the flow guiding cavity 310 may be connected to the air film holes 210.

[0052] Continue to refer to Figure 1 Based on the above embodiments, the motor cooling system 100 may further include a gas delivery device 400. The gas delivery device 400 may also be connected to the flow guide cavity 310. In this embodiment, it is understood that the gas delivery device 400 can be used to deliver cooling gas to the flow guide cavity 310, thereby forming a cooling gas film 220 on the outer surface of the air-cooled housing 200 through the gas film holes 210. By forming a cooling gas film 220 on the outer surface of the air-cooled housing 200, direct heat transfer from the external high-temperature environment to the motor housing is blocked, and the surface heat is carried away by the gas film flow, achieving thermal shielding of the motor housing and significantly reducing the operating temperature of the motor.

[0053] For example, depending on the requirements of the motor's operating environment, the cooling gas can be air, nitrogen, carbon dioxide, argon, or other suitable gases, and the embodiments of this application are not limited herein.

[0054] Thus, the motor cooling system 100 provided in this embodiment of the application, by setting the air film vents 210 and the flow guiding cavity 310, blocks the heat transfer path between the external high-temperature environment and the motor housing 300. On the one hand, the formed cooling air film 220 covers the surface of the air-cooled housing 200, preventing external heat convection from directly acting on the motor housing 300, thereby avoiding overheating failure of the motor caused by external environmental heat radiation and heat convection directly heating the motor housing 300. On the other hand, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled housing 200 and the outer wall of the motor housing 300 within the flow guiding cavity 310. This significantly improves the motor's operating capability under extreme high-temperature environments, extends the motor's service life, and improves operational reliability.

[0055] Furthermore, the motor cooling system 100 provided in this application embodiment, by providing the film cooling hole 210 and the flow guiding cavity 310, enables the air-cooled outer casing 200 to simultaneously prevent direct heating of the motor outer casing 300 by heat radiation. Specifically, the motor cooling system 100, through the formed film cooling hole 210 and flow guiding cavity 310, effectively blocks the heat transfer path between the external high-temperature environment and the motor outer casing 300.

[0056] Continue to refer to Figure 2 Based on the above embodiments, the air-cooled housing 200 may have a housing end face 230 and a housing side wall 240. On the housing end face 230 of the air-cooled housing 200, air film holes 210 may be arranged on at least one distribution circle centered on the motor shaft 600. Furthermore, on the housing side wall 240 of the air-cooled housing 200, the air film holes 210 may be arranged in layers along the direction of the motor shaft 600, forming at least one circumferentially distributed layer of air film holes 210.

[0057] Understandably, the arrangement of the film cooling holes 210 achieves a regular and full-coverage design on the surface of the air-cooled outer shell 200. The concentric circle layout on the end face can adapt to the characteristics of the heat load distribution on the end face; typically, denser or more distributed circles can be arranged in the near-axial region with higher heat load. The layered arrangement on the sidewalls ensures uniform coverage of the axial temperature gradient, with each layer of film cooling holes 210 evenly distributed circumferentially, avoiding cooling dead zones. This structured arrangement is conducive to forming a continuous and stable full-surface film cooling system, enhancing the overall thermal insulation effect, while also facilitating the processing of the film cooling holes 210 and optimizing airflow organization.

[0058] In one possible implementation, such as Figure 3As shown, on the end face 230 of the air-cooled housing 200, the air film holes 210 are radially and uniformly distributed or arranged in a cross pattern on the end face 230 of the housing by adjusting the angle (e.g., ∠a1, ∠a2) between the line connecting the preset position of the air film holes 210 to the center of the circle and the axis of the distribution circle. The diameter and spacing of the distribution circle, as well as the number and spacing of the air film holes 210 on each distribution circle, are determined according to the motor's heat dissipation requirements and the air film stability requirements.

[0059] like Figure 4 As shown, on the side wall 240 of the air-cooled housing 200, along the direction of the motor shaft 600, at least one layer of air film holes 210 are distributed at different intervals from the end face 230 of the housing towards the rear of the motor, with a layer spacing of L. 21 L 22 ...L 2n The spacing L between each air film pore 210 on each layer of air film pore 210 3n L 4n ...and the dimensions and quantity are determined according to actual usage requirements.

[0060] For example, the aperture of the air film pores 210 is typically between 0.1 mm and 2 mm, and their distribution can be flexibly adjusted according to the actual required air volume, air pressure, and heat insulation effect. Specifically, the spacing between the air film pores 210 is generally 3-10 times the aperture to ensure the formation of a continuous, gapless surface air film. In addition, the air film pores 210 can be arranged in a sequential straight line or in a cross arrangement, and the specific layout can be determined according to the requirements of the motor's operating environment for the stability of the air film.

[0061] refer to Figure 5 Based on the above embodiments, on the end face 230 of the housing, the projection of the outlet of any air film hole 210 onto the end face 230 of the housing can form an angle with the line connecting the location of the air film hole 210 and the center of the circle. Additionally, on the side wall 240 of the housing, the projection direction of the outlet of any air film hole 210 onto the circumferential direction of the side wall 240 of the housing can form an angle with the central axis of the motor.

[0062] Understandably, the specific angled design of the outlet direction of the air film orifice 210 allows the ejected cooling gas to generate tangential or swirling components. On the housing end face 230, the angle causes the gas to rotate along the housing end face 230, enhancing the gas's coverage and sweeping effect on the housing end face 230. On the housing side wall 240, the angled design allows the gas to flow circumferentially, forming a rotating air film layer around the motor axis. This not only improves heat insulation performance but also enhances air film adhesion through centrifugal force, reducing gas stripping. The angled design significantly improves the stability and uniformity of the air film coverage, preventing localized overheating.

[0063] Based on the above embodiments, in one possible implementation, the axial direction of the air film hole 210 may be inclined at an angle of 30° to 60° to the surface of the air-cooled housing 200.

[0064] Specifically, when the tilt angle is too small, such as less than 30°, the airflow may be too close to the wall surface, affecting the thickness and stability of the air film. When the tilt angle is too large, such as greater than 60°, the normal component of the airflow impact velocity may be too large, potentially causing the gas to detach from the surface prematurely and reducing the coverage effect. In the embodiments of this application, it is understood that a tilt angle of 30°–60° can achieve a balance between gas impact force and adhesion, ensuring effective air film adhesion while promoting air film diffusion on the surface and enhancing convective heat transfer.

[0065] refer to Figure 6 Based on the above embodiments, exemplarily, the shape of the outlet of the air film aperture 210 can include any one of a straight-through type, a trumpet-shaped type, or a fan-shaped structure, and this application embodiment is not limited thereto. It is understood that the outlet of the straight-through type air film aperture 210 is simple to process and provides concentrated airflow, making it suitable for localized high heat flux areas or scenarios requiring high impact velocities. The gradually expanding outlet structure of the trumpet-shaped air film aperture 210 can reduce the airflow outlet velocity, increase the airflow diffusion area, and form a thicker and more stable air film layer, suitable for large-area uniform heat insulation. The fan-shaped air film aperture 210 has a flat fan-shaped outlet, which allows the gas to rapidly widen at the outlet, forming a wide air film, suitable for areas requiring rapid coverage of large areas.

[0066] In this way, the diverse outlet structures can be configured in a targeted manner according to the differences in heat load of various parts of the motor, so as to achieve refined thermal management. The embodiments of this application are not limited herein.

[0067] refer to Figure 7 Based on the above embodiments, a turbulence-disrupting structure 211 may be provided at the outlet of the air film hole 210. The turbulence-disrupting structure 211 may protrude from the outer surface of the air-cooled housing 200. Exemplarily, the turbulence-disrupting structure 211 may include any one of a spherical, teardrop-shaped, conical, rhomboid, or spindle-shaped structure; this embodiment of the application is not limited thereto.

[0068] Specifically, the turbulence structure 211 can be located near the outlet of the film gas aperture 210. Understandably, the turbulence structure 211 can be used to actively intervene in the airflow pattern, disrupt the laminar boundary layer, and enhance the mixing and momentum exchange between the airflow and the external high-temperature environment gas, thereby improving the cooling efficiency of the film gas and its resistance to high-temperature gas intrusion. Different shapes of turbulent fluids generate different wakes and vortex structures; for example, teardrop or spindle shapes can guide the airflow through a smooth transition, reducing pressure loss. Conical or rhomboid shapes can enhance turbulent heat transfer. Thus, the design of the turbulence structure 211 further improves the stability and thermal insulation performance of the film gas in high-speed or highly turbulent external environments.

[0069] refer to Figure 8 Based on the above embodiments, the motor cooling system 100 may further include a high-pressure air source 500. The high-pressure air source 500 may be connected to the gas delivery device 400. In this embodiment, it is understood that the high-pressure air source 500 can be used to provide cooling gas.

[0070] Specifically, the high-pressure gas source 500 can originate from an independent compressed air unit, high-pressure gas cylinders, or an existing low-temperature, high-pressure gas pipeline network in the motor installation environment. High-pressure gas ensures sufficient dynamic pressure and flow rate to overcome the effects of external environmental pressure and thermal buoyancy, guaranteeing a continuous and stable gas film covering the surface of the air-cooled outer shell 200. High-pressure delivery also facilitates uniform gas distribution within the guide cavity 310 and the formation of a high-speed jet through the gas film holes 210, enhancing the convective cooling effect on the wall surface. The high-pressure gas from the high-pressure gas source 500 enables the system to maintain reliable cooling capacity even under high-temperature and high-pressure environments.

[0071] Continue to refer to Figure 1 Based on the above embodiments, the gas delivery device 400 may include a gas source interface 410. The gas source interface 410 may be located at one end of the motor and connected to a high-pressure gas source 500. In one possible implementation, the gas source interface 410 may employ connection methods such as pagoda fittings, compression fittings, quick couplings, or fusion splices to adapt to different operating environments and gas supply lines.

[0072] Continue to refer to Figure 1 Based on the above embodiments, the motor may have a motor shaft 600. The hollow structure inside the motor shaft 600 may form an air collecting cavity 610. In this embodiment, the air collecting cavity 610 may be connected to an air source interface 410. Additionally, the motor shaft 600 may also be provided with an air guide hole 620. It is understood that the air guide hole 620 can be used to connect the air collecting cavity 610 and the flow guiding cavity 310.

[0073] Specifically, the hollow structure of the motor shaft 600 is used as a gas delivery channel, achieving a high degree of structural integration. This eliminates the need for external piping, saving space and improving system reliability. Cooling gas enters the gas collection chamber 610 within the rotating motor shaft 600 through the gas source interface 410, and then is evenly ejected into the guide chamber 310 under centrifugal force through the guide holes 620 on the motor shaft 600. This not only ensures high delivery efficiency but also promotes uniform circumferential gas distribution within the guide chamber 310 through the rotational effect, making it particularly suitable for high-speed motors. Simultaneously, the gas flowing through the motor shaft 600 also provides some cooling to the shaft system, improving bearing operating conditions.

[0074] Continue to refer to Figure 1 Based on the above embodiments, the hollow structure inside the motor shaft 600 can also be provided with an energy storage structure 630. Exemplarily, the energy storage structure 630 can be an energy storage chamber filled with high-pressure gas or a mechanical energy storage device; this embodiment is not limited thereto. By filling with high-pressure gas or configuring a mechanical energy storage device, the function of the gas collecting chamber 610 in regulating airflow and stabilizing gas pressure is enhanced.

[0075] Understandably, the energy storage structure 630 can be used to maintain the supply of cooling gas for a short period of time when the gas source is temporarily interrupted or the pressure fluctuates. The energy storage chamber can continuously supply gas using the high-pressure gas it stores. Mechanical energy storage devices (such as spring accumulators) can store energy when the gas source is normal and release energy to drive gas transport when pressure is lost. The energy storage structure 630 significantly improves the safety redundancy of the motor cooling system 100, ensuring that in the event of a sudden gas outage or gas source failure, the motor can still safely shut down or continue to operate for a short time under film protection, avoiding instantaneous overheating damage caused by cooling interruption.

[0076] Continue to refer to Figure 8 Based on the above embodiments, the motor cooling system 100 may further include a control system 700. Further, the control system 700 may include a temperature sensor 710, a controller 720, and a pressure regulating valve 730. The temperature sensor 710 is used to monitor the temperature of the motor or the air-cooled housing 200. The controller 720 may be connected to the temperature sensor 710. Additionally, the pressure regulating valve 730 may be disposed in the air path and connected to the controller 720. In this embodiment, the pressure regulating valve 730 is used to adjust the pressure or flow rate of the cooling gas according to the instructions of the controller 720.

[0077] Understandably, the control system 700 achieves intelligent and on-demand adjustment of motor cooling. The temperature sensor 710 monitors the temperature of key components in real time, and the controller 720 dynamically adjusts the opening of the pressure regulating valve 730 based on temperature feedback and preset algorithms (such as PID control), thereby changing the flow and pressure of the cooling gas. In low-load or low-temperature environments, the gas volume is reduced to save energy; in high-load or high-temperature environments, the gas volume is increased to enhance cooling. This system not only improves cooling efficiency but also optimizes gas consumption, achieving adaptive thermal management and further improving the overall energy efficiency and operational economy of the motor system.

[0078] In this embodiment, the motor cooling system 100 provided utilizes the coordinated design of the film cooling port 210 and the guide cavity 310, and directly blocks the heat transfer path between the external high-temperature environment and the motor housing 300 through a physical isolation mechanism. Cooling gas enters the guide cavity 310 from the gas source interface 410 and is ejected through the film cooling port 210 to form a film layer. This film layer covers the surface of the air-cooled housing 200, preventing external convective heat transfer from directly affecting the motor housing 300, thus avoiding overheating failure of internal motor components. Simultaneously, the flowing cooling gas further removes heat through convective heat exchange with the inner wall of the air-cooled housing 200 and the outer wall of the motor housing 300 within the guide cavity 310, achieving a dual effect of "heat insulation + heat dissipation." This technology solves the problem of motor protection failure caused by the lack of blocked heat transfer paths in traditional cooling technologies, significantly improving the motor's operating capability in extreme high-temperature environments, extending the motor's service life, and enhancing operational reliability.

[0079] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0080] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0081] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A motor cooling system, characterized in that, include: An air-cooled housing (200) has a plurality of air film holes (210) on its outer surface. The motor housing (300) is located inside the air-cooled housing (200), and a flow guide cavity (310) is formed between the motor housing (300) and the air-cooled housing (200), and the flow guide cavity (310) is connected to the air film hole (210); A gas delivery device (400) is connected to the flow guide cavity (310) and is used to deliver cooling gas to the flow guide cavity (310) so that the cooling gas forms a cooling gas film (220) on the outer surface of the air-cooled housing (200) through the gas film hole (210).

2. The motor cooling system according to claim 1, characterized in that, The air-cooled housing (200) has a housing end face (230) and a housing side wall (240). On the housing end face (230) of the air-cooled housing (200), the air film holes (210) are arranged on at least one distribution circle with the motor axis as the center. On the side wall (240) of the air-cooled housing (200), the air film holes (210) are arranged in layers along the motor axis to form at least one layer of air film holes (210) distributed circumferentially.

3. The motor cooling system according to claim 2, characterized in that, On the end face (230) of the housing, the projection of the outlet of any of the air film holes (210) on the end face (230) of the housing forms an angle with the line connecting the location of the air film hole (210) and the center of the circle; On the side wall (240) of the housing, the projection direction of any of the air film holes (210) in the circumferential direction of the side wall (240) of the housing forms an angle with the central axis of the motor.

4. The motor cooling system according to any one of claims 1-3, characterized in that, The axial direction of the air film hole (210) is inclined at an angle of 30° to 60° to the surface of the air-cooled outer shell (200).

5. The motor cooling system according to any one of claims 1-3, characterized in that, The outlet of the air film vent (210) includes any one of the following structures: straight-through, trumpet-shaped, or fan-shaped.

6. The motor cooling system according to any one of claims 1-3, characterized in that, A turbulence structure (211) is provided at the outlet of the air film hole (210). The turbulence structure (211) protrudes from the outer surface of the air-cooled shell (200). The turbulence structure (211) includes any one of the following: spherical, teardrop-shaped, conical, rhomboid, or spindle-shaped structures.

7. The motor cooling system according to any one of claims 1-3, characterized in that, Also includes: A high-pressure gas source (500) is connected to the gas delivery device (400) and is used to provide cooling gas.

8. The motor cooling system according to claim 7, characterized in that, The gas delivery device (400) includes: a gas source interface (410), which is located at one end of the motor and connected to the high-pressure gas source (500); The motor has a motor shaft (600), and the hollow structure inside the motor shaft (600) forms an air collecting cavity (610), which is connected to the air source interface (410). The motor shaft (600) is also provided with an air guide hole (620), which is used to connect the air collection chamber (610) and the flow guide chamber (310).

9. The motor cooling system according to claim 8, characterized in that, The hollow structure inside the motor shaft (600) is also provided with an energy storage structure (630), which is an energy storage chamber filled with high-pressure gas or a mechanical energy storage device.

10. The motor cooling system according to any one of claims 1-3, characterized in that, Also includes: Control system (700), the control system (700) includes: A temperature sensor (710) is used to monitor the temperature of the motor or the air-cooled housing (200); A controller (720) is connected to the temperature sensor (710); A pressure regulating valve (730) is provided in the gas path and connected to the controller (720) for adjusting the pressure or flow rate of the cooling gas according to the instructions of the controller (720).

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