Axial motor air cooling system

Abstract

The invention relates to the technical field of axial motor heat dissipation, in particular to an axial motor air cooling system which comprises a front plate and a rear plate, a rotor assembly and a stator assembly are installed between the front plate and the rear plate, and a ventilation shaft is fixedly installed in the middle of the interior of the rotor assembly in a penetrating mode. And the rear end of the ventilation shaft rotationally penetrates through the heat dissipation back plate and then is fixedly connected with a rotating shaft piece, a heat dissipation frame is fixedly installed in the middle of the heat dissipation front plate, a pressure fan is rotationally installed in the heat dissipation frame, and a speed increasing mechanism is arranged between the pressure fan and the ventilation shaft. According to the motor, on one hand, the fan can be further driven to rotate at a high speed by driving the double-shaft speed increaser while the motor operates, so that an additional high-speed fan does not need to be installed for heat dissipation, and on the other hand, airflow entering the motor can penetrate through the multiple gaps and the air channels between the rotor assembly and the stator assembly; therefore, the internal parts of the motor can be fully cooled.

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 can be called axial permanent magnet motors or disc permanent magnet motors. They are gaining more and more attention due to their compact structure, high efficiency, and high power density. Axial motors are particularly suitable for applications that require high torque density and compact space, such as electric vehicles, renewable energy systems, gear energy storage systems, and industrial equipment. As the power of axial motors increases, their heat generation also increases, making the cooling and thermal design of axial motors particularly important.

[0003] For example, the patent application document with Chinese utility model publication number CN210444135U discloses a forced air-cooled disc motor, which drives the bracket to rotate on the rear end cover in cooperation with the rotating shaft 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 drives 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 uses the flowing air to take away the heat generated by the operation of the entire device, so as to realize air cooling of the entire device. Although a certain air-cooling heat dissipation effect can be achieved, there are still the following problems during use, that is, the fan machine is difficult to operate at high speed, resulting in insufficient air intake inside the device, which is easy to affect the 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: 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 installed on the surface of the front plate, a heat dissipation back plate is fixedly installed on the surface of the rear plate, a rotor assembly and a stator assembly are installed between the front plate and the rear plate, a ventilation shaft is fixedly installed through the middle position inside the rotor assembly, the rear end of the ventilation shaft is fixedly connected to a rotating shaft after rotating through the heat dissipation back plate, the front end of the ventilation shaft is hollow inside, a heat dissipation frame is fixedly installed at the middle position of the heat dissipation front plate, a pressure fan is rotatably installed inside the heat dissipation frame, and a speed increasing mechanism is arranged between the pressure fan and the ventilation shaft; A heat dissipation cavity is arranged between the rotor assembly and the stator assembly, a plurality of ventilation holes are opened at medium angles on the front end side wall of the ventilation shaft, the ventilation holes are connected with the inside of the ventilation shaft, and an air inlet is arranged on one side of the heat dissipation cavity close to the ventilation holes on the ventilation shaft.

[0006] Preferably, a plurality of side air outlets are provided at equal intervals at the connection between the front plate and the rear plate.

[0007] Preferably, the heat dissipation front plate and the heat dissipation back plate are both hollowed out.

[0008] Preferably, an air distribution frame is fixedly connected to the front end of the ventilation shaft, a plurality of air inlets are provided at equal intervals on the side wall of the air distribution frame, and a cavity is provided between the air distribution frame and the heat dissipation frame.

[0009] Preferably, the speed increasing mechanism comprises a connecting member fixedly mounted inside the air distribution frame, a dual-axis speed increaser is fixedly mounted at the middle position of the connecting member, and one end of the dual-axis speed increaser away from the connecting member is fixedly connected to the rear side wall of the air compressor fan.

[0010] Preferably, the rotation speed of the output end of the dual-shaft speed increaser is maintained at 5500 rpm.

[0011] Preferably, the cross section of the heat dissipation cavity is arranged from wide to narrow and then to wide as a whole.

[0012] Preferably, a transverse fine air duct is provided between the rotor assembly and the ventilation shaft.

[0013] Preferably, vertical thin air ducts are arranged between the rotor assembly and the heat dissipation front plate and the heat dissipation back plate.

[0014] 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.

[0015] Compared with the prior art, the advantages of the present invention are: 1. In the present application, when the outside wind enters the inside 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 wind split frame, and the other part of the wind enters the cavity, and then enters the wind split frame from the air inlet opened on the side of the wind split frame. The wind directly enters from the middle and enters from the side air inlet in combination: on the one hand, the air intake area 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 more even.

[0016] 2. In the present application, the heat dissipation cavity is arranged from wide to narrow and then to wide again: 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 be accelerated, 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.

[0017] 3. In the present application, through the setting of the horizontal fine air duct, the airflow entering the horizontal fine air duct can help take away the heat on 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 back plate is a process from wide to narrow and then to wide, which can effectively improve the airflow velocity and heat dissipation efficiency.

[0018] 4. In the present application, through the setting of vertical fine air ducts, the airflow entering the vertical fine air ducts can take away the heat from the outside of the rotor assembly, and cooperate with the side air outlets 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.

[0019] To summarize, through the design of the above structure in the present application, on the one hand, the motor can further drive the fan to rotate at high speed by driving the dual-axis speed increaser while the motor is running, thereby eliminating the need to install an additional high-speed fan for heat dissipation, making the overall structure of the device more concise and further reducing manufacturing costs. 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

[0020] Figure 1 This is a schematic diagram of the overall axonometric structure of an axial motor air cooling system proposed by the present invention.

[0021] 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.

[0022] Figure 3 This is a schematic structural diagram of a ventilation shaft and rotor assembly of an axial motor air cooling system proposed by the present invention.

[0023] 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.

[0024] 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.

[0025] Figure 6 for Figure 5 A schematic diagram of the enlarged structure in the middle.

[0026] Figure 7 This is a schematic diagram of the connector structure of an axial motor air cooling system proposed by the present invention.

[0027] 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

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0029] 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 to enhance 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 prior art, 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.

[0030] A heat dissipation frame 7 is fixedly installed at the middle position of the heat dissipation front plate 4, and a compression fan 8 is rotatably installed inside the heat dissipation frame 7. An air distribution frame 11 is fixedly connected to the front end of the ventilation shaft 13, 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 at the middle position of the connecting piece 22. The dual-axis speed increaser 15 is a prior art, and its specific structural design is no longer 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 through the air distribution frame 11 and the connecting piece 22 in turn, so that the rotation speed of the output end of the dual-axis speed increaser 15 is maintained at about 5500 rpm, thereby increasing the rotation speed of the compression fan 8, and thus making the air cooling efficiency able to meet the cooling requirements of the whole machine.

[0031] 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 vents are provided at a middle angle on the front end side wall of the ventilation shaft 13, the vents 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 vent 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 a whole, as shown in the attached figure. Figure 5 As shown, a horizontal fine air duct 20 is arranged between the rotor assembly 14 and the ventilation shaft 13, and a vertical fine air duct 19 is arranged 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.

[0032] 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 connecting piece 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 whole machine; the external wind enters the motor from the heat dissipation frame 7 of the front plate 1, a 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.

[0033] First, since the diameter of the compressed air fan 8 is larger than that of the air distribution frame 11, the air enters directly from the middle and from the side air inlet 12, thereby increasing the air intake area. Compared with only the middle air intake, more air can enter the air distribution frame 11 per unit time.

[0034] 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 air 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.

[0035] Third: The wind coming in from the side air inlet 12 can also assist in cooling the dual-axis speed increaser 15 to ensure the normal operation of the device.

[0036] 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 thin air duct 20 from the air inlet 21. The air inlet 21 is wider. When entering the heat dissipation cavity 18, the heat dissipation cavity 18 expands from narrow to wide, so the wind blows through the space from wide to narrow and then to wide, which has the following advantages.

[0037] First, when wind enters a relatively narrow space from a wide space, the airflow speed will increase according to the principle of fluid mechanics. Inside the motor, the gap temperature between the stator assembly 16 and the rotor assembly 14 is relatively high. The accelerated airflow can more effectively take away the heat generated by these components.

[0038] Second: The wind then enters the wider heat dissipation cavity 18 and slows down, which allows the heat to have more time to dissipate into the surrounding environment. The wider heat dissipation cavity 18 provides more space for heat exchange, and the air can fully exchange heat in this area, further reducing the overall temperature inside the motor.

[0039] Third: The flow path of wind from wide to narrow and then back to wide can make the airflow inside the motor more orderly. In the process from wide to narrow, the pressure energy of the airflow is partially converted into kinetic energy, so that the airflow can obtain sufficient speed to pass through the narrow area. When entering the wide area, the kinetic energy can be appropriately converted into pressure energy, so that the airflow forms a relatively stable pressure distribution inside the motor, improving the heat dissipation effect.

[0040] Fourth: the airflow entering the horizontal thin air duct 20 can help take away the heat on the surface of the rotating shaft 10. Similarly, the process from the air inlet 21 to the horizontal thin 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.

[0041] 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.

[0042] First, the airflow entering the vertical fine air duct 19 can take away the heat on the outside of 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.

[0043] Second: without the vertical fine air duct 19, hot air may accumulate near the side air outlet 3, forming a local high temperature area (heat island). The vertical fine air duct 19 can guide part of the hot air to other places, avoiding the accumulation of hot air in one place and improving the heat dissipation efficiency.

[0044] Third: The curved vertical fine air duct 19 changes the flow direction of the air, so that the air forms a more complex convection around the outer side of the rotor assembly 14. When the hot air flows in the vertical fine air duct 19, it will exchange heat with the outside air. Since the diameter of the vertical fine air duct 19 is small, the time for the air to flow in it will be relatively longer, which is conducive to sufficient heat exchange.

[0045] 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.

[0046] The wind is discharged from the two air outlets of the heat dissipation front plate 4. The passage length of the first heat dissipation outlet 5 that the wind passes through first is shorter, and the passage length of the second heat dissipation outlet 6 that the wind passes through later is longer. Such a design has the following advantages.

[0047] First, the flow of wind will produce pressure changes. The short diameter of the first heat dissipation port 5 can quickly reduce the pressure of the heat dissipation front plate 4 near it, while the long diameter of the second heat dissipation port 6 has a relatively slow pressure drop due to the relatively slow discharge of airflow. This pressure difference can promote the wind to flow more evenly inside the motor, prevent the occurrence of airflow dead corners, and improve the heat dissipation efficiency.

[0048] Second: The short-diameter first heat dissipation port 5 first discharges a portion of the hot air, which can quickly take away the heat generated by the motor near this side. Then, the long-diameter second heat dissipation port 6 discharges the remaining hot air. When this part of the hot air passes through a relatively long channel, it has more time to exchange heat with the channel wall. Just like cooling a hot object twice, first quickly taking away a portion of the heat, and then slowly dissipating the remaining heat, this segmented heat dissipation method can improve the efficiency of heat dissipation.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope 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 a middle position inside 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 inside, a heat dissipation frame (7) is fixedly mounted at a 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 front end side wall of the ventilation shaft (13) is provided with a plurality of ventilation openings at medium angles; 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).

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 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).

5. The axial motor air cooling system according to claim 4, characterized in that: 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 a rear side wall of the compression fan (8).

6. The axial motor air cooling system according to claim 5, characterized in that: The rotation speed of the output end of the dual-shaft speed increaser (15) is maintained at 5500 revolutions.

7. The axial motor air cooling system according to claim 1, characterized in that: The cross section of the heat dissipation cavity (18) is arranged from wide to narrow and then to wide again as a whole.

8. The axial motor air cooling system according to claim 1, characterized in that: A transverse fine air duct (20) is provided between the rotor assembly (14) and the ventilation shaft (13).

9. The axial motor air cooling system according to claim 1, characterized in that: 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).

10. The axial motor air cooling system according to claim 1, characterized in that: 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).

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