Motor heat dissipation support and rotor power system

Abstract

The utility model discloses a motor heat dissipation support and a rotor wing power system, and solves the technical problems of low flight efficiency and poor reliability when a motor is used for a rotor wing power system due to poor heat dissipation performance of an existing disc type motor. The heat dissipation structure comprises a support, the support comprises a coil sleeve and a fixing frame which are connected with each other, the coil sleeve surrounds the outer side of a motor stator, at least one heat dissipation channel is formed in the side wall of the coil sleeve, and the heat dissipation channel penetrates through the coil sleeve in the radial direction. The motor provided by the utility model has the advantages of good heat dissipation performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of motor heat dissipation, in particular to a motor heat dissipation bracket and a rotor power system. Background Art

[0002] The disc motor is a special type of motor characterized by a small axial length dimension and a large radial dimension, and a disc-like shape. Due to its high efficiency and high power density, it is widely used in elevators, commercial vehicles, construction machinery, military industry, aerospace, rotorcraft and other fields.

[0003] The application of disc motors in rotor propulsion systems is mainly reflected in their power output driving the rotor to rotate, thereby generating lift. The magnitude of the lift determines the flight capability and carrying capacity of the rotorcraft. However, if the speed of the disc motor is too high, it is easy to increase the size of the motor and generate a lot of heat. If the heat dissipation is insufficient, it will cause the disc motor to overheat and affect its reliability.

[0004] Magnetic levitation technology is an advanced technology based on electromagnetic principles. It uses the attraction or repulsion force generated by the magnetic field to maintain a certain distance between the object and the supporting surface, thereby achieving suspension. Magnetic levitation technology has the advantages of no friction, low noise, high precision and smooth operation. With the continuous development and maturity of magnetic levitation technology, its application prospects in rotor power systems are becoming more and more broad. On the one hand, magnetic levitation support has the characteristics of no contact and no friction, which can significantly increase the speed of the motor rotor ring, thereby improving the lift and flight efficiency of the rotor. On the other hand, because magnetic levitation support eliminates the friction and vibration of traditional mechanical bearings, the vibration and noise levels of the rotor are significantly reduced, thereby improving the reliability of the rotor.

[0005] In the existing patent CN118083167A, a new coaxial twin-rotor UAV is disclosed. The rotation of the coaxial twin-propeller motor drives the rotation of the blades to provide lift to the UAV. The rotation of the upper outer frame and the inner frame of the motor enables the UAV to complete pitch and roll movements, thereby improving its flexibility during flight. However, in this device, its double-layer propeller blades are installed in reverse and are both located at one end of the motor. The introduction of a speed change device is not conducive to the lightweight design of the rotor power system, and the motor used consumes a lot of energy.

[0006] The patent with publication number CN118004415A and patent name “Rotorcraft” discloses a rotor structure that utilizes the Coanda effect to enable the power rotor power system to obtain additional lift, but it does not perform additional heat dissipation treatment on the motor.

[0007] In summary, the motor of the existing device will generate a lot of heat during operation, resulting in reduced operating efficiency. Based on the problems existing in the above-mentioned existing patents, it is necessary to study a disc motor with good heat dissipation capability and better apply it to the rotor power system. Utility Model Content

[0008] The technical problem to be solved by the utility model is that the existing disc motor has poor heat dissipation performance, which leads to low flight efficiency and poor reliability when the motor is used in a rotor power system.

[0009] The utility model is achieved through the following technical solutions:

[0010] A motor heat dissipation bracket, comprising:

[0011] The bracket includes a coil sleeve and a fixing frame. The coil sleeve is enclosed outside the motor stator. The side wall of the coil sleeve is provided with at least one heat dissipation channel. The heat dissipation channel radially penetrates the coil sleeve. The coil sleeve is connected to the fixing frame.

[0012] In the present invention, when the motor is in working state, the heat generated by the coil winding in the motor stator can be passively dissipated through the coil sleeve and the heat dissipation channel. It should be noted that the coil sleeve is enclosed on the outside of the coil winding in the motor stator, and a part of the heat generated by the coil winding will be transferred to the coil sleeve, and the heat on the coil sleeve will be transferred to the fixing frame. The heat dissipation of the motor stator is realized during the heat transfer process. Through this heat dissipation structure, the stable operation of the motor is guaranteed and the service life is improved. In addition, it should be noted that the fixing frame participates in the heat conduction of the coil winding on the one hand, and on the other hand, the fixing frame will also fix the entire motor to enhance the rigidity of the motor.

[0013] Furthermore, the coil sleeve includes several sub-coil sleeves connected to each other to form a ring shape, the upper and lower ends of each sub-coil sleeve are not penetrated, each sub-coil sleeve corresponds to at least one coil winding of the motor stator, and the heat dissipation channel is arranged between two adjacent coil sub-sleeves.

[0014] After adopting this technical solution, it should be noted that the motor stator contains several coil windings. On the one hand, the sub-coil sleeve will protect the coil windings and enhance the stability of the motor. On the other hand, by opening a heat dissipation channel on the sub-coil sleeve, passive heat dissipation of the coil windings can be achieved.

[0015] Preferably, the number of the sub-coil sleeves is consistent with the number of coil windings provided on the motor stator, and a coil winding is correspondingly provided in each sub-coil sleeve.

[0016] After adopting this technical solution, it should be noted that by arranging a coil winding corresponding to a sub-coil sleeve, the mutual isolation of the two adjacent coil windings is achieved, so that the heat generated by each coil winding can be dissipated through the corresponding self-coil sleeve and the nearest heat dissipation channel, thereby achieving higher heat dissipation efficiency and heat dissipation effect. In order to improve the passive heat dissipation effect, the coil sleeve can be made of a material with good thermal conductivity and light weight, such as aluminum alloy.

[0017] Furthermore, the fixing frame includes a fixing rod and a claw arranged on the fixing rod, the fixing rod is connected to the coil sleeve, the claw includes a radial limiting assembly claw and / or an axial support assembly claw, the radial limiting assembly claw is used to fix the radial limiting assembly, and the axial support assembly claw is used to fix the axial support assembly.

[0018] Furthermore, the claws are provided with an upper radial limit assembly claw, an upper axial support assembly claw, a lower axial support assembly claw and a lower radial limit assembly claw in sequence from top to bottom.

[0019] After adopting this technical solution, it should be noted that a groove ring that fits the claw is provided on the radial limit assembly and axial support assembly of the motor, and the claw will be limited and clamped with the groove ring. By setting the bracket and the claw, on the one hand, in order to support the radial limit assembly and the axial support assembly and maintain the overall stability; on the other hand, the heat generated by the motor coil winding will be transferred to the coil sleeve, and the coil sleeve will transfer the heat to the bracket, thereby realizing passive heat dissipation of the motor coil winding.

[0020] Preferably, the fixing frames are provided in three groups and are evenly distributed on the outside of the sub-coil sleeve, thereby reducing weight while ensuring support stability.

[0021] Preferably, the motor includes an upper motor rotor and a lower motor rotor, the upper motor rotor and the lower motor rotor are sleeved on the rotating shaft and can rotate with the rotation of the rotating shaft, the motor stator is located between the upper motor rotor and the lower motor rotor, the gaps between the upper motor rotor, the lower motor rotor, the motor stator and the rotating shaft form a duct connected to the outside world, the rotating shaft is provided with a heat dissipation component at the duct, and the heat dissipation channel is connected to both the duct and the outside world.

[0022] After adopting this technical solution, the motor has a dual-rotor structure, providing higher performance. The heat dissipation channel and duct will cooperate with the bracket to dissipate heat. It should be noted that, on the one hand, by opening a heat dissipation channel connected to the duct and the outside world on the side wall of the coil sleeve, when the rotation of the shaft drives the heat dissipation component to rotate, a negative pressure is formed at the heat dissipation component, so the external air flow flows into the heat dissipation component through the duct between the upper rotor and the motor stator of the motor and the lower rotor and the motor stator. Under the action of the heat dissipation component, the air flow is thrown out from the heat dissipation channel and takes away the heat generated by the coil winding, thereby realizing active heat dissipation. In addition, when the hot air flow flows out of the heat dissipation channel, it will also fully contact the side wall of the coil sleeve to better conduct heat. On the other hand, it should be noted that the upper and lower ends of the heat dissipation channel do not pass through the upper and lower ends of the sub-coil sleeve, so that the air flow inhaled from the duct and the air flow discharged from the heat dissipation channel are isolated from each other and do not interfere with each other, thereby improving the heat dissipation effect.

[0023] Preferably, a radial limit assembly and an axial support assembly are also provided outside the rotating shaft, the radial limit assembly includes an upper radial limit assembly and a lower radial limit assembly, the axial support assembly includes an upper axial support assembly and a lower axial support assembly, the upper axial support assembly is located above the upper rotor of the motor, and the lower axial support assembly is located below the lower rotor of the motor, the upper radial limit assembly is located above the upper axial support assembly, and the lower radial limit assembly is located below the lower axial support assembly, the upper radial limit assembly claw, the upper axial support assembly claw, the lower axial support assembly claw and the lower radial limit assembly claw respectively clamp the upper radial limit assembly, the upper axial support assembly, the lower axial support assembly and the lower radial limit assembly.

[0024] The radial limiting component includes a radial electromagnetic coil, and a component that can generate magnetic action with the radial electromagnetic coil is arranged on the rotating shaft, or the rotating shaft itself is made of ferromagnetic material.

[0025] The axial support assembly includes an axial electromagnetic coil. A component capable of generating magnetic interaction with the axial electromagnetic coil is arranged on the motor rotor end face corresponding to the axial support assembly, or the motor rotor itself is made of ferromagnetic material.

[0026] After adopting this technical solution, it should be noted that both the radial limit assembly and the axial support assembly use electromagnets. The radial limit assembly is used to improve the stability of the rotating shaft during rotation and reduce rotational friction, while the axial support assembly is used to control the suspension between the axial support assembly and the rotor ring to achieve low-energy rotation of the rotor ring.

[0027] The rotating shaft is provided with a circumferential inner recess, the heat dissipation components are evenly distributed in the inner recess along the circumference of the rotating shaft, the inner recess corresponds to the motor stator, and the duct and the heat dissipation channel are both connected to the inner recess.

[0028] After adopting this technical solution, it should be noted that by setting an inner recess on the rotating shaft, on the one hand, the rotation of the heat dissipation component will form a negative pressure space in the inner recess. At this time, the external gas will be sucked into the inner recess through the duct under the action of the pressure difference, and then thrown out under the rotation of the heat dissipation component in the inner recess. The thrown-out airflow will flow out along the heat dissipation channel. This process will take away the heat transferred from the coil winding to the sub-coil sleeve. On the other hand, the setting of the inner recess makes the setting of the rotating shaft and the subsequent motor more compact, thereby improving space utilization.

[0029] A rotor power system includes a motor heat dissipation bracket, wherein the rotor is connected to the rotating shaft.

[0030] Preferably, the rotor includes an upper blade and a lower blade, the upper blade and the lower blade are respectively arranged at the upper and lower ends of the rotating shaft, and the motor and the fixing frame are located between the upper blade and the lower blade.

[0031] By providing a double layer of blades, the utility model achieves increased motor torque and lift through the dual-rotor motor structure combined with the double-layer rotor structure. Furthermore, the double layer of blades dissipates heat from the motor. Specifically, the upper and lower blades are disposed at the upper and lower ends of the rotating shaft. When the shaft drives the upper and lower blades to rotate, they generate a downward downwash due to the lift they provide. The downwash generated by the upper blades removes heat from the motor bracket.

[0032] The utility model has the following advantages and beneficial effects:

[0033] 1. The utility model designs a motor heat dissipation bracket. By setting a coil sleeve, it encloses the outside of the coil winding in the motor stator. Part of the heat generated by the coil winding will be transferred to the coil sleeve, and the heat on the coil sleeve will be transferred to the fixed frame. The heat dissipation of the motor stator is achieved during the heat transfer process. This heat dissipation structure ensures the stable operation of the motor and improves its service life.

[0034] 2. The utility model isolates two adjacent coil windings from each other by correspondingly setting one sub-coil sleeve to one coil winding, so that the heat generated by each coil winding can be dissipated through the sub-coil sleeve and the nearest heat dissipation channel, achieving higher heat dissipation efficiency and heat dissipation effect.

[0035] 3. The utility model opens a heat dissipation channel connected to the duct and the outside world on the side wall of the coil sleeve. Under the action of the heat dissipation component, the external air flow flows from the duct into the heat dissipation component, and then throws the air out from the heat dissipation channel, taking away the heat generated by the coil winding.

[0036] 4. The upper and lower ends of the heat dissipation channel of the utility model do not penetrate the upper and lower ends of the sub-coil sleeve, so that the airflow inhaled from the duct and the airflow discharged from the heat dissipation channel are isolated from each other without interfering with each other, thereby improving the heat dissipation effect.

[0037] 5. The utility model supports the radial limit assembly and the axial support assembly by arranging claws on the fixed frame to maintain overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the cross-sectional structure of the motor of the utility model;

[0040] Figure 2 This is a schematic diagram of the heat dissipation bracket structure of the utility model;

[0041] Figure 3 for Figure 2 The enlarged schematic diagram of point I in the middle;

[0042] Figure 4 This is a schematic diagram of a rotating shaft structure of the utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the rotor power system of the utility model;

[0044] Figure 6 This is a schematic diagram of the structure of the rotor power system of the utility model without the coil sleeve.

[0045] The names of the components in the accompanying drawings are as follows:

[0046] 1-rotating shaft, 101-heat dissipation assembly, 102-inner recess, 2-upper radial limit assembly; 3-upper axial support assembly; 4-upper rotor of the motor; 5-motor stator, 501-coil winding; 6-lower rotor of the motor; 7-lower axial support assembly; 8-lower radial limit assembly; 9-bracket, 901-upper radial limit assembly claw, 902-upper axial support assembly claw, 903-lower axial support assembly claw, 904-lower radial limit assembly claw, 905-heat dissipation channel, 906-fixing rod; 10-sub-coil sleeve; 11-duct; 12-upper blade; 13-lower blade. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0048] Example 1

[0049] like Figures 1-6 As shown, a motor heat dissipation bracket includes:

[0050] The bracket 9 includes a coil sleeve and a fixing frame connected to each other. The coil sleeve is enclosed outside the motor stator 5. At least one heat dissipation channel 905 is opened on the side wall of the coil sleeve. The heat dissipation channel 905 radially penetrates the coil sleeve.

[0051] In this embodiment, the coil sleeve includes several sub-coil sleeves 10 connected to each other to form a ring shape, and the upper and lower ends of each sub-coil sleeve 10 are not penetrated. Each sub-coil sleeve 10 corresponds to at least one coil winding 501 of the motor stator 5, and the heat dissipation channel 905 is arranged between two adjacent sub-coil sleeves 10. The upper and lower ends of the heat dissipation channel 905 do not penetrate the upper and lower ends of the sub-coil sleeve 10.

[0052] In this embodiment, the number of the sub-coil sleeves 10 is consistent with the number of the coil windings 501 provided on the motor stator 5 , and one coil winding 501 is correspondingly provided in each sub-coil sleeve 10 .

[0053] By correspondingly sleeved a coil winding 501 on a sub-coil sleeve 10, mutual isolation of two adjacent coil windings 501 is achieved, so that the heat generated by each coil winding 501 can be dissipated through the sub-coil sleeve 10 and the nearest heat dissipation channel 905, thereby achieving higher heat dissipation efficiency and heat dissipation effect. In order to improve the passive heat dissipation effect, the sub-coil sleeve 10 can be prepared using a material with good thermal conductivity and light weight, such as aluminum alloy.

[0054] It should be noted that two or more coil windings 501 may be arranged as a group in one sub-coil sleeve 10, and the corresponding relationship between the number of coil windings 501 and the sub-coil sleeve 10 can be selected according to weight and heat dissipation requirements.

[0055] In this embodiment, the fixing frames are provided in three groups and are evenly distributed on the outside of the sub-coil sleeve 10 , thereby reducing the weight while ensuring support stability. It should be noted that more groups can be provided as needed.

[0056] Example 2

[0057] The difference between this embodiment and embodiment 1 is that Figure 1 and Figure 2 As shown, for a dual-rotor motor with a radial limit assembly and an axial support assembly, the heat dissipation bracket is designed to match the radial limit assembly and the axial support assembly, as follows:

[0058] The motor includes an upper motor rotor 4 and a lower motor rotor 6, which are sleeved on a rotating shaft 1 and can rotate with the rotation of the rotating shaft. If the rotating shaft 1 adopts a spline shaft, the motor stator 5 is located between the upper motor rotor 4 and the lower motor rotor 6. The gaps between the upper motor rotor 4 and the lower motor rotor 6, and the gaps between the motor stator 5 and the rotating shaft 1 form a duct 11 connected to the outside world.

[0059] A radial limit assembly and an axial support assembly are provided on the outside of the rotating shaft 1 of the motor, the radial limit assembly includes an upper radial limit assembly 2 and a lower radial limit assembly 8, the axial support assembly includes an upper axial support assembly 3 and a lower axial support assembly 7, the upper axial support assembly 3 is located above the upper rotor 4 of the motor, and the lower axial support assembly 7 is located below the lower rotor 6 of the motor, the upper radial limit assembly 2 is located above the upper axial support assembly 3, and the lower radial limit assembly 8 is located below the lower axial support assembly 7.

[0060] The radial limiting assembly includes a radial electromagnetic coil. A component that can generate magnetic interaction with the radial electromagnetic coil is provided on the rotating shaft 1, or the rotating shaft 1 itself is made of ferromagnetic material.

[0061] The axial support assembly includes an axial electromagnetic coil. A component capable of generating magnetic interaction with the axial electromagnetic coil is arranged on the motor rotor end face corresponding to the axial support assembly, or the motor rotor itself is made of ferromagnetic material.

[0062] In this embodiment, the fixing frame includes a fixing rod 906, on which are arranged, from top to bottom, an upper radial position component claw 901, an upper axial support component claw 902, a lower axial support component claw 903 and a lower radial position component claw 904. The fixing rod 906 is connected to the outer side of the sub-coil sleeve 10, and the upper radial limit component claw 901, the upper axial support component claw 902, the lower axial support component claw 903 and the lower radial limit component claw 904 respectively clamp the upper radial limit component 2, the upper axial support component 3, the lower axial support component 7 and the lower radial limit component 8.

[0063] Example 3

[0064] The difference between this embodiment and embodiment 2 is that Figure 1 and Figure 4 As shown, for motors with active heat dissipation structures, the heat dissipation bracket and the active heat dissipation structure work together to improve heat dissipation performance, specifically:

[0065] The rotating shaft 1 is provided with a heat dissipation component 101 at the duct 11, and the heat dissipation channel 905 is connected with the duct 11 and the outside world. A circumferential recess 102 is provided on the rotating shaft 1, and the heat dissipation component 101 is evenly distributed in the recess 102 along the circumference of the rotating shaft 1. The recess 102 corresponds to the motor stator 5. The duct 11 and the heat dissipation channel 905 are both connected with the recess 102. Cold air is sucked into the recess 102 through the duct 11, and then thrown out through the heat dissipation channel 905 under the rotation of the heat dissipation component 101 to realize active heat dissipation. At the same time, the bracket plays a role in passive heat dissipation, thereby realizing the coordination of active and passive heat dissipation and improving the heat dissipation effect.

[0066] Example 4

[0067] A rotor power system comprising the motor heat dissipation bracket of any one of embodiments 1-3, such as Figure 5 and Figure 6 As shown, a rotor is connected to the rotating shaft 1, and the rotor includes an upper blade 12 and a lower blade 13. The upper blade 12 and the lower blade 13 are respectively arranged at the upper and lower ends of the rotating shaft 1, and the motor and the fixing frame are located between the upper blade 12 and the lower blade 13.

[0068] By setting up double-layer blades, on the one hand, by setting up a dual-rotor motor structure in conjunction with the double-layer rotor structure, the motor torque is increased and the lift is improved. On the other hand, the double-layer blades play a role in cooling the motor. The heat dissipation is specifically as follows: First of all, it should be explained that the upper blades 12 and the lower blades 13 are respectively arranged at the upper and lower ends of the rotating shaft 1. When the rotating shaft 1 drives the upper blades 12 and the lower blades 13 to rotate, the upper blades 12 and the lower blades 13 will inevitably generate downward downwash airflow due to the lift they provide, and the downwash airflow generated by the upper blades 12 will take away the heat from the motor bracket 9.

[0069] In the rotor power system, the working principle of the present invention is as follows: the dual-rotor motor structure drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the upper blades 12 and the lower blades 13 to rotate coaxially and in the same direction to increase lift. During the operation of the motor, the coil winding 501 on the motor stator 5 will generate heat, which will be transferred through two heat dissipation methods: active heat dissipation and passive heat dissipation.

[0070] Passive heat dissipation: The heat generated by the coil is directly conducted outward through the coil sleeve and diffused outward through the heat dissipation channel 905. Some of the heat from the coil sleeve is also conducted to the fixing frame, and then heat is exchanged with the external air for heat dissipation;

[0071] Active heat dissipation: On the one hand, the rotation of the rotating shaft drives the heat dissipation component 101 to rotate. The rotation of the heat dissipation component 101 forms a negative pressure space in the inner recess 102, and the external air flow is sucked into the inner recess 102 through the duct 11 between the upper and lower motor rotors and the motor stator 5, and is thrown out through the heat dissipation channel 905 under the impact of the heat dissipation component 101. The thrown air flow will take away the heat on the coil sleeve, thereby achieving cooling inside the motor; on the other hand, under the action of the downwash airflow generated by the rotation of the upper rotor, the heat conducted to the frame through passive heat dissipation will be taken away, thereby achieving auxiliary heat dissipation.

[0072] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A motor heat dissipation bracket, characterized in that: include: A bracket (9), the bracket (9) comprising a coil sleeve and a fixing frame connected to each other, the coil sleeve being enclosed outside the motor stator (5), the side wall of the coil sleeve being provided with at least one heat dissipation channel (905), the heat dissipation channel (905) radially penetrating the coil sleeve.

2. The motor heat dissipation bracket according to claim 1, characterized in that: The coil sleeve comprises a plurality of sub-coil sleeves (10) connected to each other to form a ring shape, wherein the upper and lower ends of each sub-coil sleeve (10) are not penetrated, and each sub-coil sleeve (10) contains at least one coil winding (501) corresponding to the motor stator (5), and the heat dissipation channel (905) is provided between two adjacent sub-coil sleeves (10).

3. The motor heat dissipation bracket according to claim 2, characterized in that: The number of the sub-coil sleeves (10) is consistent with the number of coil windings (501) provided on the motor stator (5), and a coil winding (501) is correspondingly provided in each sub-coil sleeve (10).

4. A motor heat dissipation bracket according to any one of claims 1 to 3, characterized in that: The fixing frame includes a fixing rod (906) and a claw arranged on the fixing rod (906), the fixing rod (906) is connected to the coil sleeve, the claw includes a radial limit assembly claw and / or an axial support assembly claw, the radial limit assembly claw is used to fix the radial limit assembly, and the axial support assembly claw is used to fix the axial support assembly.

5. The motor heat dissipation bracket according to claim 4, characterized in that: The claws are provided with an upper radial limit assembly claw (901), an upper axial support assembly claw (902), a lower axial support assembly claw (903) and a lower radial limit assembly claw (904) in sequence from top to bottom.

6. A motor heat dissipation bracket according to any one of claims 1 to 3, characterized in that: The fixing frames are arranged in 3 groups and are evenly distributed on the outside of the coil sleeve.

7. A rotor power system, characterized in that: It comprises the motor heat dissipation bracket according to any one of claims 1 to 6.

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