Motor cooling structure and motor

Abstract

This invention relates to the field of motors, and more particularly to a motor cooling structure and a motor. The disclosed motor cooling structure includes an upper cover and a lower cover. A guide fan is disposed on the inner side of the upper and lower covers, and the airflow from the guide fan flows in the same direction. A guide cavity is formed on the inner side of the upper and lower covers, and an exhaust port extending to the outer side is formed at the end of the guide cavity. This invention, through the placement of the guide fan and the unidirectional airflow design, allows the internal airflow to flow in a single direction. Combined with the exhaust port designed on the surface of the upper and lower covers, it achieves unidirectional airflow conduction, providing unidirectional heat dissipation during daily use. Regardless of whether the motor rotates forward or backward, a unidirectional heat dissipation function is formed, ensuring the central heat dissipation function and reducing heat accumulation problems during prolonged use.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more particularly to an electric motor cooling structure and an electric motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy through electromagnetic induction. Different types of motors can be used depending on the application, such as servo motors, stepper motors, and flux motors. Flux motors have a different structure than ordinary motors. The magnetic flux is axial, and the current-carrying system is placed radially, with an overall disc-shaped structure. This special structural design gives them stronger torque, but it also generates more heat. Most flux motors use liquid cooling, but this cannot cool the center of the stator and rotor, leading to heat accumulation over long-term use and affecting their lifespan. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides the following technical solution: An electric motor cooling structure includes an upper cover and a lower cover.

[0004] Specifically, the upper and lower covers are provided with guide fans on their inner sides, the gas blown out by the guide fans flows in the same direction, the upper and lower covers are provided with guide cavities on their inner sides, and the end of the guide cavity is provided with an exhaust port that extends to the outside.

[0005] As an improvement to the above technical solution, the outer sides of the upper cover and the lower cover are integrally formed with several ear plates, and bolts are inserted into the inside of the ear plates, and the bolts are screwed into the fixing parts of the motor.

[0006] As an improvement to the above technical solution, the upper cover and the lower cover are integrally formed with a base plate at their ends. The base plate is used to fit the surface of the motor's connecting parts. A through slot is opened in the middle of the upper cover and the lower cover for the motor's power shaft to be inserted.

[0007] The motor has the motor cooling structure described in the aforementioned technical solution, including: a stator frame and a central shaft penetrating the inner cavity.

[0008] Specifically, a through-hole is provided in the middle of the stator frame, and the guide fans are respectively installed on the shaft bodies located on both sides of the stator frame. The two ends of the central shaft pass through the surfaces of the upper cover and the lower cover respectively. A rotor frame is provided between the stator frame and the guide fans. Several through-holes are provided on the surface of the rotor frame. The rotor frame is fixed to the central shaft.

[0009] As an improvement to the above technical solution, a stator slot is provided in the middle of the inner side of the stator frame, and a stator winding is provided inside the stator slot. Several evenly distributed mounting slots are opened on the side of the rotor frame facing the stator winding, and a rotor is provided inside the mounting slot.

[0010] As an improvement to the above technical solution, side cavities are provided at both ends of the stator slot, the rotor frame is disposed inside the side cavity, and the bottom plate is attached to the end face of the stator frame to restrict the rotor frame to be inside the side cavity.

[0011] As an improvement to the above technical solution, a liquid inlet 1 and a liquid inlet 2 are provided on one side of the stator frame, and a flow channel is provided inside the stator frame. One end of the flow channel is connected to the liquid inlet 1, and the other end of the flow channel is connected to the liquid inlet 2. The liquid inlet 1 is used for liquid inlet, and the other is used for liquid outlet.

[0012] As an improvement to the above technical solution, the flow channel includes three layers. Two layers are embedded in the stator frame at the position of the side cavity, and the other layer is opened inside the stator slot. The upper and lower flow channels have one liquid port connected to liquid inlet one and one liquid port connected to liquid inlet two. The two ends of the middle flow channel are respectively connected to the other liquid ports of the upper and lower flow channels.

[0013] As an improvement to the above technical solution, connecting rings are fixed to the outer sides of both ends of the central shaft, and the outer sides of the connecting rings are detachably fixed to the inner sidewall of the rotor frame. The air holes are located within the vertical space of the inner cavity.

[0014] As an improvement to the above technical solution, the outer side of the stator frame is integrally formed with several ear plates, and the upper cover, lower cover and the ear plates of the stator frame are fixed by bolts inserted inside.

[0015] The beneficial effects of this invention are: By incorporating a deflector fan and a unidirectional airflow design, the internal airflow is directed in a single direction. Combined with the exhaust vents on the surfaces of the upper and lower covers, this enables unidirectional airflow and provides unidirectional heat dissipation during daily use. Regardless of whether the motor rotates forward or backward, it maintains a unidirectional heat dissipation function, ensuring proper cooling at the center and reducing heat buildup during prolonged use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a side view of the present invention; Figure 5 for Figure 4 A planar sectional view at point aa; Figure 6 This is a three-dimensional structural diagram of the top cover of the present invention.

[0017] Reference numerals: 10. Stator frame; 11. Stator slot; 111. Stator winding; 112. Inner cavity; 113. Side cavity; 12. Liquid inlet one; 13. Liquid inlet two; 14. Flow channel; 20. Top cover; 21. Flow guide cavity; 22. Exhaust port; 23. Ear plate; 24. Base plate; 30. Bottom cover; 40. Central shaft; 41. Connecting ring; 42. Rotor frame; 421. Air hole; 422. Mounting slot; 423. Rotor; 43. Guide fan. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] The structure of a flux motor differs from that of a regular motor. The magnetic flux is axial, and the current-carrying conductor is placed radially. The overall structure is disc-shaped. This special structure gives it stronger torque, but it also generates more heat. Most flux motors use liquid cooling, but it cannot cool the center of the stator and rotor. This heat buildup during long-term use will affect the long service life.

[0020] To address the above problems, the following implementation method is provided: Example 1

[0021] Please see Figures 1 to 6 A motor cooling structure is provided, comprising: an upper cover 20 and a lower cover 30.

[0022] Specifically, the upper cover 20 and the lower cover 30 are provided with a flow guide fan 43. The air blown out by the flow guide fan 43 flows in the same direction. The upper cover 20 and the lower cover 30 are provided with a flow guide cavity 21. The end of the flow guide cavity 21 is provided with an exhaust port 22 that extends to the outside.

[0023] Unlike traditional structures, flux motors typically consist of only three housing layers: a central stator housing and end covers at both ends. The upper cover 20 and lower cover 30 are fitted together to seal both ends of the motor. Airflow is provided by guide fans 43 located on the inner side. Since the airflow from the two guide fans 43 is in the same direction, a unilateral airflow is formed. Air is drawn in from the outside and blown out from the middle, carrying away heat from the motor's interior during its flow and expelling it from the other side, thus achieving heat dissipation. To reduce the damage to the internal structure from particulate matter, a dust filter can be installed at the exhaust port 22. The installation of the upper cover 20 and lower cover 30 typically employs the following design: The outer sides of the upper cover 20 and the lower cover 30 are integrally formed with several ear plates 23. Bolts are inserted into the inside of the ear plates 23 and screwed into the fixing parts of the motor.

[0024] The connection is secured by bolts inserted through the ear plate 23. In some cases, rubber rings are also embedded at the connection to ensure tightness and reduce porosity caused by structural component errors.

[0025] The upper cover 20 and the lower cover 30 also need to restrict the rotor assembly installed on the inner side. Based on this, the following design is given: The upper cover 20 and the lower cover 30 are integrally formed with a base plate 24 at their ends. The base plate 24 is used to fit the surface of the motor connector. The upper cover 20 and the lower cover 30 have a through slot in the middle for the motor's power shaft to be inserted.

[0026] The inner rotor assembly is restricted by the base plate 24. Of course, only the design of the cooling structure is given in this embodiment. In order to further enhance the understanding of the function of the motor structural components by those skilled in the art, a second embodiment is proposed. Example 2

[0027] To refine and apply the cooling structure described in Example 1, please refer to... Figures 1 to 6 The invention provides an electric motor having the motor cooling structure shown in the embodiments, including: a stator frame 10 and a central shaft 40 penetrating the inner cavity 112.

[0028] Specifically, a through cavity 112 is provided in the middle of the stator frame 10, and the guide fans 43 are respectively installed on the shaft bodies of the central shaft 40 located on both sides of the stator frame 10. The two ends of the central shaft 40 pass through the surfaces of the upper cover 20 and the lower cover 30 respectively. A rotor frame 42 is provided between the stator frame 10 and the guide fans 43. Several through air holes 421 are provided on the surface of the rotor frame 42. The rotor frame 42 is fixed to the central shaft 40.

[0029] In this embodiment, the stator frame 10 serves as the main structural support, not only fixing the upper cover 20 and the lower cover 30, but also cooperating with the rotor frame 42 to form an internal airflow guide. Because the surface of the rotor frame 42 has several through-holes 421, the airflow drawn in from the bottom passes through the middle and flows out through the holes 421, carrying away heat from the various structural components in the process. Finally, the airflow is discharged from the exhaust port 22 on the other side, thus achieving a heat dissipation effect. The structural design of the stator and rotor is shown below: A stator slot 11 is provided in the middle of the inner side of the stator frame 10. A stator winding 111 is provided inside the stator slot 11. A number of evenly distributed mounting slots 422 are provided on the side of the rotor frame 42 facing the stator winding 111. A rotor 423 is provided inside the mounting slots 422.

[0030] The stator winding 111 and the rotor 423 are fixed by the stator slot 11 and the mounting slot 422 respectively. Unlike conventional motors, the magnetism of the rotor 423 is alternately applied, while the two ends of the stator winding 111 always face the rotor 423. In order to dissipate heat from this structure, the position of its structural components needs to be restricted. In this embodiment, the position of the rotor frame 42 needs to be restricted, as follows: The stator slot 11 has side cavities 113 at both ends, and the rotor frame 42 is disposed inside the side cavity 113. The bottom plate 24 is attached to the end face of the stator frame 10 to restrict the rotor frame 42 inside the side cavity 113.

[0031] The side cavity 113 provides positional constraint on the rotor frame 42, ensuring that the rotor frame 42 will not escape from the inside of the side cavity 113. Furthermore, the base plate 24 abuts against the outlet of the side cavity 113, blocking the position of the rotor frame 42 and providing positional constraint to ensure that the rotor frame 42 will not wobble or shift position during rotation. After solving this problem, its heat dissipation structure is designed as follows: One side of the stator frame 10 is provided with a liquid inlet 12 and a liquid inlet 13. The stator frame 10 is provided with a flow channel 14. One end of the flow channel 14 is connected to the liquid inlet 12 and the other end of the flow channel 14 is connected to the liquid inlet 13. One liquid inlet 12 is used for liquid inlet and the other liquid outlet is used for liquid outlet.

[0032] The external liquid inlet 12 and liquid outlet 13 form an external liquid supply and outlet structure. The internal flow channel 14 contacts various heat-generating locations. When coolant flows in from one end, it carries away heat from these locations, thereby reducing the overall operating temperature of the motor. Finally, it is discharged from the other end, achieving the heat dissipation function for the stator frame 10. Based on this, the internal flow channel 14 is further designed as follows: The flow channel 14 includes three layers. Two layers are embedded in the stator frame 10 at the position of the side cavity 113, and the other layer is opened inside the stator slot 11. One liquid port of the upper flow channel 14 and the lower flow channel 14 are connected to the liquid inlet 12, and the other liquid port is connected to the liquid inlet 13. The two ends of the middle flow channel 14 are connected to the other liquid ports of the upper flow channel 14 and the lower flow channel 14, respectively.

[0033] The coolant enters through the upper flow channel 14, flows through the upper layer and then enters the middle flow channel 14. The coolant in the upper flow channel 14 carries away some of the heat from the rotor frame 42, while the coolant in the middle flow channel 14 absorbs the heat around the stator winding 111 and enters the lower layer to absorb some of the heat from the rotor frame 42. Finally, it is discharged from the lower layer, achieving overall heat dissipation of the stator frame 10. Combined with the previous air-cooled heat dissipation structure, it achieves heat dissipation of the stator winding 111 and stator 423, ensuring a high level of internal heat dissipation.

[0034] In one embodiment, connecting rings 41 are fixed to the outer sides of both ends of the central shaft 40. The outer side of the connecting rings 41 is detachably fixed to the inner sidewall of the rotor frame 42. The air hole 421 is located within the vertical space of the inner cavity 112.

[0035] The central shaft 40 is installed via the connecting ring 41. The installation between the connecting ring 41 and the central shaft 40 is usually achieved through an interference fit, while the connecting ring 41 and the rotor frame 42 are installed by bolts, welding, or other methods. After the fixing is completed, the position of the air hole 421 is stable and confined within the vertical space of the inner cavity 112, ensuring that the airflow can stably enter from one side and flow out from the other side. After the airflow hits the surface of the upper cover 20 or the lower cover 30, it enters the guide cavity 21 and finally exits from the exhaust port 22, achieving the heat dissipation effect.

[0036] Similar to the aforementioned design of the connection structure between the upper cover 20 and the lower cover 30, this embodiment further designs the mounting structure of the stator frame 10, as shown below: The stator frame 10 has several ear plates 23 integrally formed on its outer side. The upper cover 20, the lower cover 30 and the ear plates 23 of the stator frame 10 are fixed by bolts that pass through the interior.

[0037] The upper and lower covers 20 are fixed through the ear plates 23. The inserted bolts also need to be fixed with an additional nut. The connection between the nut and the bolts will firmly fix the upper cover 20 and the lower cover 30 to the upper and lower sides of the stator frame 10.

[0038] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An electric motor cooling structure characterized by comprising: include: The upper cover (20) and the lower cover (30) are provided with a guide fan (43) on the inner side of the upper cover (20) and the lower cover (30). The air blown out by the guide fan (43) flows in the same direction. A guide cavity (21) is opened on the inner side of the upper cover (20) and the lower cover (30). An exhaust port (22) extending to the outside is opened at the end of the guide cavity (21).

2. An electric machine cooling structure according to claim 1, characterized in that: The upper cover (20) and the lower cover (30) are integrally formed with several ear plates (23), and bolts are inserted into the inside of the ear plates (23), and the bolts are screwed into the fixing parts of the motor.

3. An electrical machine cooling structure according to claim 2, characterised in that: The upper cover (20) and the lower cover (30) are integrally formed with a base plate (24) at their ends. The base plate (24) is used to fit the surface of the motor connector. The upper cover (20) and the lower cover (30) have through slots in the middle for inserting the motor's power shaft.

4. An electric motor having the electric motor cooling structure according to claim 3, characterized by include: Stator frame (10), wherein a through cavity (112) is provided in the middle position of the stator frame (10); A central shaft (40) passes through the inner cavity (112). The guide fan (43) is respectively installed on the shaft body of the central shaft (40) located on both sides of the stator frame (10). The two ends of the central shaft (40) pass through the surfaces of the upper cover (20) and the lower cover (30) respectively. A rotor frame (42) is provided between the stator frame (10) and the guide fan (43). The surface of the rotor frame (42) is provided with several through air holes (421). The rotor frame (42) is fixed to the central shaft (40).

5. The electric machine of claim 4, wherein: A stator slot (11) is provided in the middle of the inner side of the stator frame (10), and a stator winding (111) is provided inside the stator slot (11). A number of evenly distributed mounting slots (422) are provided on the side of the rotor frame (422) facing the stator winding (111), and a rotor (423) is provided inside the mounting slot (422).

6. The electric machine of claim 5, wherein: The stator slot (11) has side cavities (113) at both ends. The rotor frame (42) is located inside the side cavity (113). The bottom plate (24) fits against the end face of the stator frame (10) to restrict the rotor frame (42) inside the side cavity (113).

7. The motor according to any one of claims 5, characterized in that: The stator frame (10) is provided with a liquid inlet 1 (12) and a liquid inlet 2 (13) on one side. The stator frame (10) is provided with a flow channel (14). One end of the flow channel (14) is connected to the liquid inlet 1 (12), and the other end of the flow channel (14) is connected to the liquid inlet 2 (13). The liquid inlet 1 (12) and the liquid inlet 2 (13) are used for liquid inlet and liquid outlet, respectively.

8. The electric machine of claim 7, wherein: The flow channel (14) comprises three layers. Two layers are embedded in the stator frame (10) at the position of the side cavity (113), and the other layer is opened inside the stator slot (11). The upper flow channel (14) and the lower flow channel (14) have one liquid port connected to the liquid inlet one (12) and one liquid port connected to the liquid inlet two (13). The two ends of the middle flow channel (14) are respectively connected to the other liquid ports of the upper flow channel (14) and the lower flow channel (14).

9. The electric machine of claim 4, wherein: Connecting rings (41) are fixed to the outer sides of both ends of the central shaft (40). The outer side of the connecting rings (41) is detachably fixed to the inner sidewall of the rotor frame (42). The air hole (421) is located within the vertical space of the inner cavity (112).

10. An electrical machine according to any one of claims 4 to 9, characterised in that: The stator frame (10) has several ear plates (23) integrally formed on its outer side. The upper cover (20), lower cover (30) and the ear plates (23) of the stator frame (10) are fixed by bolts inserted inside.

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