Axial motor air cooling system

Abstract

The present invention relates to the field of axial motor heat dissipation technology, and in particular to an axial motor air cooling system, comprising a front plate and a rear plate, a rotor assembly and a stator assembly being installed between the front plate and the rear plate, a ventilation shaft being fixedly installed through a middle position inside the rotor assembly, the rear end of the ventilation shaft being fixedly connected to a rotating shaft after rotating through a heat dissipation back plate, a heat dissipation frame being fixedly installed at a middle position of the heat dissipation front plate, a pressure fan being rotatably installed inside the heat dissipation frame, and a speed increasing mechanism being provided between the pressure fan and the ventilation shaft. In the present application, on the one hand, the motor can further drive the fan to rotate at high speed by driving a dual-axis speed increaser while running, thereby eliminating the need to install an additional high-speed fan for heat dissipation, and on the other hand, the airflow entering the motor can pass through multiple gaps and air ducts between the rotor assembly and the stator assembly, thereby facilitating sufficient heat dissipation of the internal parts of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of axial motor heat dissipation, and in particular to an axial motor air cooling system. Background Art

[0002] Axial motors, also known as axial permanent magnet motors or disc permanent magnet motors, are gaining increasing attention due to their compact structure, high efficiency, and high power density. They are particularly well-suited for applications requiring high torque density and compact space, such as electric vehicles, renewable energy systems, geared energy storage systems, and industrial equipment. As the power of axial motors increases, their heat generation also increases, making cooling and thermal design of axial motors particularly important.

[0003] For example, the patent application document with the Chinese utility model publication number CN210444135U discloses a forced air-cooled disc motor. The device drives the bracket to rotate with the rotating shaft on the rear end cover through the interaction between the magnetic steel and the stator mechanism, thereby driving the fan mechanism to work, so that wind pressure is generated inside the entire device, and then driving the external air to enter the inner cavity of the casing through the first air inlet hole, the second air inlet hole and the first ventilation hole respectively, and using the flowing air to take away the heat generated by the operation of the entire device, thereby realizing air cooling of the entire device. Although a certain air-cooling and heat dissipation effect can be achieved, there are still the following problems during use, namely, the fan machine is difficult to operate at high speed, resulting in insufficient air intake inside the device, which is easy to affect heat dissipation. At the same time, the internal air duct setting is relatively conventional, and it is difficult to achieve more sufficient heat dissipation inside the device. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose an axial motor air cooling system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An axial motor air cooling system comprises a front plate and a rear plate, the front plate and the rear plate are fixedly connected, a heat dissipation front plate is fixedly mounted on the surface of the front plate, a heat dissipation back plate is fixedly mounted on the surface of the rear plate, a rotor assembly and a stator assembly are mounted between the front plate and the rear plate, a ventilation shaft is fixedly mounted through a middle position inside the rotor assembly, a rear end of the ventilation shaft is fixedly connected to a rotating shaft member after rotating through the heat dissipation back plate, the front end of the ventilation shaft is hollow, a heat dissipation frame is fixedly mounted at a middle position of the heat dissipation front plate, a pressure fan is rotatably mounted inside the heat dissipation frame, and a speed increasing mechanism is provided between the pressure fan and the ventilation shaft;

[0007] A heat dissipation cavity is provided between the rotor assembly and the stator assembly, a plurality of ventilation holes are opened at a medium angle on the front side wall of the ventilation shaft, the ventilation holes are connected with the inside of the ventilation shaft, and an air inlet is provided on the side of the heat dissipation cavity close to the ventilation hole on the ventilation shaft.

[0008] Preferably, a plurality of side air outlets are provided at equal intervals at the connection between the front plate and the rear plate.

[0009] Preferably, the heat dissipation front plate and the heat dissipation back plate are both hollowed out.

[0010] Preferably, the front end of the ventilation shaft is fixedly connected to an air distribution frame, a plurality of air inlets are provided on the side wall of the air distribution frame at equal intervals, and a cavity is provided between the air distribution frame and the heat dissipation frame.

[0011] Preferably, the speed increasing mechanism includes a connecting piece fixedly mounted inside the air distribution frame, a dual-axis speed increaser is fixedly mounted at the middle position of the connecting piece, and one end of the dual-axis speed increaser away from the connecting piece is fixedly connected to the rear side wall of the compression fan.

[0012] Preferably, the speed of the output end of the dual-shaft speed increaser is maintained at 5500 rpm.

[0013] Preferably, the cross section of the heat dissipation cavity is arranged from wide to narrow and then to wide as a whole.

[0014] Preferably, a transverse fine air duct is provided between the rotor assembly and the ventilation shaft.

[0015] Preferably, vertical thin air ducts are provided between the rotor assembly and the heat dissipation front plate and the heat dissipation back plate.

[0016] Preferably, the heat dissipation front plate has a plurality of second heat dissipation openings at equal angles on its inner periphery and a plurality of first heat dissipation openings at equal angles on its outer periphery, and the channel length of the first heat dissipation openings is longer than that of the second heat dissipation openings.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. In the present application, when the external wind enters the interior of the motor from the heat dissipation frame of the front plate, part of the wind directly enters the central area of ​​the rotor assembly through the air split frame, and the other part of the wind enters the cavity, and then enters the air split frame from the air inlet opened on the side of the air split frame. The wind directly enters from the middle and enters from the side air inlet: on the one hand, the area of ​​air intake is increased, and compared with only the middle air intake, more air can enter the air split frame per unit time; on the other hand, the airflow distribution entering the air split frame can be made more uniform.

[0019] 2. In the present application, the heat dissipation cavity is arranged from wide to narrow and then to wide: on the one hand, when the wind enters a relatively narrow space from a wide space, according to the principles of fluid mechanics, the airflow speed will accelerate, and the accelerated airflow can more effectively take away the heat generated by the stator assembly and the rotor assembly; on the other hand, when the wind enters the wider heat dissipation cavity again, the speed slows down, which allows the heat to have more time to dissipate into the surrounding environment; at the same time, the flow path of the wind from wide to narrow and then to wide can make the airflow inside the motor more orderly.

[0020] 3. In this application, through the setting of the horizontal fine air duct, the air flow entering the horizontal fine air duct can help take away the heat from the surface of the rotating shaft, and the process from the air inlet to the horizontal fine air duct and then to the heat dissipation backplane is a process from wide to narrow and then to wide, which can effectively improve the air flow rate and heat dissipation efficiency.

[0021] 4. In this application, through the setting of vertical fine air ducts, the air flow entering the vertical fine air ducts can take away the heat from the outside of the rotor assembly, and cooperate with the side air outlet to take away the internal heat, thereby achieving a better heat dissipation effect. At the same time, the bent vertical fine air ducts will change the flow direction of the air, so that the air forms a more complex convection around the outside of the rotor assembly, which is conducive to heat exchange with the outside air.

[0022] To sum up, in this application, through the design of the above structure, on the one hand, the motor can further drive the fan to rotate at high speed by driving the dual-axis speed increaser while running, so there is no need to install an additional high-speed fan for heat dissipation, making the overall structure of the device more concise and the manufacturing cost further reduced. On the other hand, the airflow entering the motor can pass through multiple gaps and air ducts between the rotor assembly and the stator assembly, thereby facilitating sufficient heat dissipation of the internal parts of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall axonometric structure of an axial motor air cooling system proposed in the present invention.

[0024] Figure 2 This is a schematic diagram of the heat dissipation back plate and rotating shaft structure of an axial motor air cooling system proposed by the present invention.

[0025] Figure 3 This is a schematic structural diagram of the ventilation shaft and rotor assembly of an axial motor air cooling system proposed by the present invention.

[0026] Figure 4 This is a schematic diagram of the heat dissipation frame and pressure fan structure of an axial motor air cooling system proposed by the present invention.

[0027] Figure 5 This is a schematic diagram of the overall half-section structure of an axial motor air cooling system proposed by the present invention.

[0028] Figure 6 for Figure 5 A magnified schematic diagram of the structure in the middle.

[0029] Figure 7 This is a schematic diagram of the connector structure of an axial motor air cooling system proposed by the present invention.

[0030] In the figure: 1 front plate, 2 rear plate, 3 side air outlet, 4 heat dissipation front plate, 5 first heat dissipation outlet, 6 second heat dissipation outlet, 7 heat dissipation frame, 8 pressure fan, 9 heat dissipation back plate, 10 rotating shaft, 11 wind distribution frame, 12 air inlet, 13 ventilation shaft, 14 rotor assembly, 15 dual-axis speed increaser, 16 stator assembly, 17 cavity, 18 heat dissipation cavity, 19 vertical fine air duct, 20 horizontal fine air duct, 21 air inlet, 22 connecting parts. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Reference Figures 1 to 7 , an axial motor air cooling system, including a front plate 1 and a rear plate 2, the front plate 1 and the rear plate 2 are fixedly connected, and a plurality of side air outlets 3 are opened at equal intervals at the connection between the two, a heat dissipation front plate 4 is fixedly installed on the surface of the front plate 1, and a heat dissipation back plate 9 is fixedly installed on the surface of the rear plate 2, the heat dissipation front plate 4 and the heat dissipation back plate 9 are both hollowed out, thereby enhancing the heat dissipation effect, a rotor assembly 14 and a stator assembly 16 are installed between the front plate 1 and the rear plate 2, the rotor assembly 14 and the stator assembly 16 are both existing technologies, and their specific structural designs are not repeated here, a ventilation shaft 13 is fixedly installed through the middle position inside the rotor assembly 14, and one end of the ventilation shaft 13 is fixedly connected to a rotating shaft 10 after rotating through the heat dissipation back plate 9.

[0033] A heat dissipation frame 7 is fixedly installed in the middle position of the heat dissipation front plate 4, and a compression fan 8 is rotatably installed inside the heat dissipation frame 7. The front end of the ventilation shaft 13 is fixedly connected to an air distribution frame 11, and a plurality of air inlets 12 are provided on the side walls of the air distribution frame 11 at equal intervals. A connecting piece 22 is fixedly installed inside the air distribution frame 11, and a dual-axis speed increaser 15 is fixedly installed in the middle position of the connecting piece 22. The dual-axis speed increaser 15 is a prior art, and its specific structural design is not repeated here. The end of the dual-axis speed increaser 15 away from the connecting piece 22, i.e., the output end, is fixedly connected to the rear side wall of the compression fan 8, so that when the ventilation shaft 13 rotates, the dual-axis speed increaser 15 can be driven to rotate in turn through the air distribution frame 11 and the connecting piece 22, so that the speed of the output end of the dual-axis speed increaser 15 is maintained at about 5500 rpm, thereby increasing the speed of the compression fan 8, and thus making the air cooling efficiency able to meet the cooling requirements of the whole machine.

[0034] A cavity 17 is provided between the air distribution frame 11 and the heat dissipation frame 7. The front end of the ventilation shaft 13 is hollow, and a plurality of ventilation holes are provided at a medium angle on the front side wall of the ventilation shaft 13. The ventilation holes are connected to the interior of the ventilation shaft 13. A heat dissipation cavity 18 is provided between the rotor assembly 14 and the stator assembly 16. An air inlet 21 is provided on one side of the heat dissipation cavity 18 close to the ventilation hole on the ventilation shaft 13, and the cross section of the heat dissipation cavity 18 is arranged from wide to narrow and then to wide as shown in the attached figure. Figure 5 As shown, a horizontal fine air duct 20 is provided between the rotor assembly 14 and the ventilation shaft 13, and a vertical fine air duct 19 is provided between the rotor assembly 14 and the heat dissipation front plate 4 and the heat dissipation back plate 9. A plurality of second heat dissipation openings 6 are opened at equal angles on the inner periphery of the heat dissipation front plate 4, and a plurality of first heat dissipation openings 5 ​​are opened at equal angles on the outer periphery. The channel length of the first heat dissipation opening 5 is shorter, and the channel length of the second heat dissipation opening 6 is longer.

[0035] The specific working principle of the present invention is as follows: when the motor is working, the internal rotor assembly 14 is connected to the compressed air fan 8 through the dual-axis speed increaser 15 in the air distribution frame 11; the dual-axis speed increaser 15 is connected to the rotor assembly 14 through the connector 22; the motor rotates through the dual-axis speed increaser 15 so that the output speed is maintained at about 5500 rpm, so that the air cooling efficiency can meet the cooling requirements of the entire machine; the external wind enters the interior of the motor from the heat dissipation frame 7 of the front panel 1, and part of the wind directly enters the central area of ​​the rotor assembly through the air distribution frame 11, and the other part of the wind enters the cavity 17, and then enters the air distribution frame 11 from the air inlet 12 opened on the side of the air distribution frame 11.

[0036] First, because the diameter of the compressed air fan 8 is larger than that of the air distribution frame 11, the air enters directly from the center and from the side air inlet 12, thereby increasing the air intake area. Compared with only the center air intake, more air can enter the air distribution frame 11 per unit time.

[0037] Second: Intake of air from the middle and the side at the same time can make the airflow entering the air distribution frame 11 more evenly distributed. If only the middle is used for intake, the airflow may form a relatively concentrated columnar airflow in the air distribution frame 11, and the presence of a dual-axis speed increaser 15 in the middle of the air distribution frame 11 will block the entry of wind, and may also cause large differences in air circulation at different positions in the frame; the air entering from the side air inlet 12 can be mixed with the air in the middle, making the distribution of the airflow in the air distribution frame 11 more balanced.

[0038] Third: The wind coming in from the side air inlet 12 can also assist in dissipating the heat of the dual-axis speed increaser 15 to ensure the normal operation of the device.

[0039] The gas entering the ventilation shaft 13 enters the air inlet 21 from all sides, and then enters the heat dissipation cavity 18 and the horizontal fine air duct 20 from the air inlet 21. The air inlet 21 is wider, and when entering the heat dissipation cavity 18, the heat dissipation cavity 18 is expanded from narrow to wide, so the wind is equivalent to blowing through the space from wide to narrow and then to wide. This has the following advantages.

[0040] First, when wind moves from a wide space into a relatively narrow one, the airflow speeds up according to the principles of fluid dynamics. Inside the motor, the gap between the stator assembly 16 and the rotor assembly 14 is hotter. The accelerated airflow more effectively removes the heat generated by these components.

[0041] Second, the air then enters the wider heat dissipation cavity 18, where its velocity slows, allowing more time for the heat to dissipate into the surrounding environment. The wider heat dissipation cavity 18 provides ample space for heat exchange, allowing the air to fully exchange heat in this area, further reducing the overall temperature inside the motor.

[0042] Third, the wind's flow path, from wide to narrow and then back to wide again, creates a more orderly flow inside the motor. During this transition, the airflow's pressure energy is partially converted into kinetic energy, enabling it to gain sufficient speed to pass through the narrow area. Once in the wide area, the kinetic energy is appropriately converted into pressure energy, creating a more stable pressure distribution within the motor and improving heat dissipation.

[0043] Fourth: The airflow entering the horizontal fine air duct 20 can help take away the heat from the surface of the rotating shaft 10. Similarly, the process from the air inlet 21 to the horizontal fine air duct 20 and then to the heat dissipation back plate 9 is a process from wide to narrow and then to wide, which increases the airflow velocity and improves the heat dissipation efficiency.

[0044] Part of the airflow in the heat dissipation cavity 18 flows out from the structural gap of the stator assembly 16 and is discharged from the side air outlet 3, taking away the heat from the central area of ​​the motor. Another part of the airflow enters the vertical fine air ducts 19 on both sides. The airflow in the vertical fine air ducts 19 finally flows out from the heat dissipation back plate 9 and the heat dissipation front plate 4. This has the following advantages.

[0045] First, the airflow entering the vertical fine air duct 19 can take away the heat outside the rotor assembly 14, and cooperate with the side air outlet 3 to take away the internal heat, thereby achieving a better heat dissipation effect.

[0046] Second, without the vertical fine air ducts 19, hot air may accumulate near the side air outlets 3, forming a localized high-temperature area (heat island). The vertical fine air ducts 19 can guide some of the hot air to other locations, preventing it from accumulating in one place and improving heat dissipation efficiency.

[0047] Third, the curved vertical ducts 19 change the direction of air flow, creating more complex convection around the outside of the rotor assembly 14. As hot air flows through the vertical ducts 19, it exchanges heat with the outside air. Because the vertical ducts 19 have a smaller diameter, the air flows through them for a relatively longer time, which facilitates efficient heat exchange.

[0048] The existence of the cavity 17 cooperates with the heat dissipation front plate 4 to still provide a spatial change process of wind flow from wide to narrow and then to wide, thereby increasing the heat dissipation efficiency of the heat dissipation front plate 4.

[0049] The air is discharged from the two air outlets of the heat dissipation front plate 4. The passage length of the first heat dissipation outlet 5 through which the air passes first is shorter, and the passage length of the second heat dissipation outlet 6 through which the air passes later is longer. This design has the following advantages.

[0050] First, wind flow creates pressure variations. The short diameter of the first heat dissipation vent 5 quickly reduces pressure near the heat dissipation front plate 4. Meanwhile, the longer diameter of the second heat dissipation vent 6 causes a slower pressure drop due to the slower airflow. This pressure differential promotes more uniform air flow within the motor, preventing dead zones and improving heat dissipation efficiency.

[0051] Second: The short-diameter first heat dissipation vent 5 first exhausts a portion of the hot air, quickly removing the heat generated by the motor near the side. Subsequently, the long-diameter second heat dissipation vent 6 exhausts the remaining hot air. This portion of hot air has more time to exchange heat with the channel walls as it passes through the relatively long channel. This staged heat dissipation method is like cooling a hot object in two steps: first quickly removing some heat, then slowly dissipating the remaining heat.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An axial motor air cooling system, comprising a front plate (1) and a rear plate (2), wherein the front plate (1) and the rear plate (2) are fixedly connected, characterized in that: A heat dissipation front plate (4) is fixedly mounted on the surface of the front plate (1), a heat dissipation back plate (9) is fixedly mounted on the surface of the rear plate (2), a rotor assembly (14) and a stator assembly (16) are mounted between the front plate (1) and the rear plate (2), a ventilation shaft (13) is fixedly mounted through the middle position of the rotor assembly (14), the rear end of the ventilation shaft (13) is fixedly connected to a rotating shaft (10) after rotating through the heat dissipation back plate (9), the front end of the ventilation shaft (13) is hollow, a heat dissipation frame (7) is fixedly mounted at the middle position of the heat dissipation front plate (4), a pressure fan (8) is rotatably mounted inside the heat dissipation frame (7), and a speed increasing mechanism is arranged between the pressure fan (8) and the ventilation shaft (13); A heat dissipation cavity (18) is provided between the rotor assembly (14) and the stator assembly (16); a plurality of ventilation openings are provided at a medium angle on the front side wall of the ventilation shaft (13); the ventilation openings are communicated with the interior of the ventilation shaft (13); and an air inlet (21) is provided on one side of the heat dissipation cavity (18) close to the ventilation opening on the ventilation shaft (13); The front end of the ventilation shaft (13) is fixedly connected to an air distribution frame (11), a plurality of air inlets (12) are provided on the side wall of the air distribution frame (11) at equal intervals, and a cavity (17) is provided between the air distribution frame (11) and the heat dissipation frame (7); The speed increasing mechanism comprises a connecting member (22) fixedly mounted inside the air distribution frame (11), a dual-axis speed increasing device (15) fixedly mounted at a middle position of the connecting member (22), and an end of the dual-axis speed increasing device (15) away from the connecting member (22) is fixedly connected to the rear side wall of the compression fan (8); The cross section of the heat dissipation cavity (18) is generally arranged from wide to narrow and then to wide again; A transverse fine air duct (20) is provided between the rotor assembly (14) and the ventilation shaft (13); Vertical fine air ducts (19) are provided between the rotor assembly (14), the heat dissipation front plate (4), and the heat dissipation back plate (9); The heat dissipation front plate (4) has a plurality of second heat dissipation openings (6) formed at equal angles on its inner periphery, and a plurality of first heat dissipation openings (5) formed at equal angles on its outer periphery, wherein the channel length of the first heat dissipation openings (5) is longer than the channel length of the second heat dissipation openings (6).

2. The axial motor air cooling system according to claim 1, characterized in that: A plurality of side air outlets (3) are provided at equal intervals at the connection between the front plate (1) and the rear plate (2).

3. The axial motor air cooling system according to claim 1, characterized in that: The heat dissipation front plate (4) and the heat dissipation back plate (9) are both hollowed out.

4. The axial motor air cooling system according to claim 1, characterized in that: The rotational speed of the output end of the dual-shaft speed increaser (15) is maintained at 5500 rpm.

Images