Automobile fan rotating shaft with heat dissipation function

Abstract

The invention relates to the field of bearing heat dissipation, in particular to an automobile fan rotating shaft with a heat dissipation function, which comprises a connecting end, a rotating shaft body arranged on the connecting end, a spiral fin arranged on the middle section of the rotating shaft body, and a self-dispersing heat dissipation unit arranged on the rotating shaft body. The spiral fins and the miniature fan blades are driven to rotate, so that the rotating shaft body becomes a fan, airflow is induced to pass through the rotating shaft body and the inner cooling channel through rotation, the heat exchange coefficient is increased, then directional airflow is formed under disturbance of the spiral guide strips through airflow passing through the inner cooling channel and blowing of the inner cooling assembly, and the heat exchange efficiency is improved. The spiral guide groove is matched to drive the conical section and the cylindrical section to rotate relative to the rotating shaft body, airflow passing through the inner cooling channel is further accelerated, the airflow channel is gradually compressed through cooperation of the air inlet cavity and the compression cavity, the pressure of the airflow passing through the inner cooling channel is gradually increased, and the airflow is accelerated.

Description

Technical Field

[0001] This invention relates to the field of bearing heat dissipation, and in particular to a fan shaft for automobiles with heat dissipation function. Background Technology

[0002] Automotive fans typically employ axial flow fans, whose structural principle involves a coaxial arrangement of "motor-shaft-fan blades." The motor drives the fan blades to rotate via the shaft, accelerating airflow for heat dissipation. Because the motor is located at the center of the hub, the cooling airflow is blocked by the motor body during operation, creating a low-speed vortex zone in the middle section of the shaft. The heat transfer coefficient is much lower than at the blade tips. After continuous operation, bearing frictional heat and rotor iron and copper losses are transferred along the shaft, causing the shaft and bearing temperatures to rise rapidly. This leads to bearing grease oxidation, reduced clearance, and even seizing; permanent magnet demagnetization, resulting in decreased rotational speed; reduced shaft strength, decreased critical speed, and resonance, among other problems. To improve the heat dissipation of axial flow fans, additional fan blades or water-cooled jackets are commonly used. However, these methods require additional power or sealing, resulting in complex structures, poor reliability, and increased overall fan size, necessitating changes to the internal structural layout of the vehicle. Summary of the Invention

[0003] Given that the above-mentioned or existing technologies require additional power or sealing for adding fan blades or water-cooling jackets, resulting in complex structures, poor reliability, and increased overall fan size, necessitating changes to the internal structural layout of the vehicle, this invention is proposed.

[0004] Therefore, the purpose of this invention is to provide a fan shaft for automobiles with heat dissipation function.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a connecting end, a rotating shaft body disposed on the connecting end, a spiral fin disposed in the middle section of the rotating shaft body, and a self-driven heat dissipation unit disposed on the rotating shaft body; the rotating shaft body is provided with an internal cooling channel that cooperates with the self-driven heat dissipation unit; the self-driven heat dissipation unit includes a micro fan blade disposed on the internal cooling channel, a connecting frame disposed on the micro fan blade, and an internal cooling component that is rotatably connected to the micro fan blade and the connecting end at both ends respectively.

[0006] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, wherein: a limiting groove for a connecting bracket is provided on the inner wall of the internal cooling channel.

[0007] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, a spiral guide bar is provided on the inner wall of the shaft body.

[0008] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, a spiral guide bar is provided on the inner wall of the shaft body.

[0009] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, the internal cooling component includes a conical section rotatably mounted on a micro fan blade, a conical section mounted at one end of the conical section and rotatably connected to a connecting end, and a spiral guide groove mounted on the conical section and the cylindrical section.

[0010] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, the gap between the conical section and the internal cooling channel is configured as an air intake chamber, and the gap between the cylindrical section and the internal cooling channel is configured as a compression chamber.

[0011] As a preferred embodiment of the automotive fan shaft with heat dissipation function of the present invention, the internal cooling channel is further provided with a through hole penetrating the shaft body.

[0012] The beneficial effects of the automotive fan shaft with heat dissipation function of the present invention are as follows: The present invention drives the spiral fins and micro fan blades to rotate by the rotation of the shaft body itself, making the shaft body itself a fan. The rotation induces airflow through the shaft body and the internal cooling channel, improving the heat transfer coefficient. The airflow blows through the internal cooling channel and forms a directional airflow under the disturbance of the spiral guide strip. The spiral guide groove drives the conical section and cylindrical section to rotate relative to the shaft body, further accelerating the airflow through the internal cooling channel. The airflow channel is gradually compressed by the cooperation of the air intake chamber and the compression chamber, so that the airflow pressure through the internal cooling channel gradually increases, accelerating the airflow and speeding up the heat dissipation between the shaft body and the connecting bearing. This protects the connecting bearing and maintains the mechanical strength of the shaft body itself. The present invention requires no additional energy consumption and can directly replace the shaft of the existing fan. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the overall structure of a fan shaft for automobiles with heat dissipation function.

[0015] Figure 2 This is a side view of the structure of a fan shaft for automobiles with heat dissipation function.

[0016] Figure 3 This is a schematic diagram of a self-driven cooling unit for an automotive fan shaft with heat dissipation function.

[0017] Figure 4This is a schematic diagram of the shaft body of an automotive fan shaft with heat dissipation function.

[0018] Figure 5 This is a schematic diagram of the internal cooling assembly of an automotive fan shaft with heat dissipation function.

[0019] In the diagram: 1. Connecting end; 2. Shaft body; 21. Internal cooling channel; 22. Limiting slide groove; 23. Spiral guide bar; 24. Through hole; 3. Spiral fins; 4. Self-driven heat dissipation unit; 41. Miniature fan blade; 42. Connecting frame; 43. Internal cooling assembly; 431. Conical section; 432. Cylindrical section; 433. Spiral guide groove; 5. Intake chamber; 6. Compression chamber. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Example 1, referring to Figure 1 - Figure 3 This is the first embodiment of the present invention. This embodiment provides a car fan shaft with heat dissipation function, which includes a connecting end 1, a shaft body 2 disposed on the connecting end 1, a spiral fin 3 disposed in the middle section of the shaft body 2, and a self-driven heat dissipation unit 4 disposed on the shaft body 2. The connecting end 1 is used to connect to the motor output end of the fan. The shaft body 2 is connected to the fan blades and drives the fan blades to rotate in conjunction with the motor. The shaft body 2 is provided with bearings to provide support and fixation for the shaft body 2 and reduce friction loss. The spiral fins 3 are used to cooperate with the rotation of the shaft body 2 to induce disturbance in the circumferential airflow of the shaft body 2 and accelerate the heat exchange outside the shaft body 2. The self-driven heat dissipation unit 4 is used to cooperate with the rotation of the shaft body 2 to dissipate heat inside the shaft body 2.

[0022] The rotating shaft body 2 is provided with an internal cooling channel 21 that works with the self-driven heat dissipation unit 4. The self-driven heat dissipation unit 4 works with the rotation of the rotating shaft body 2 to drive airflow through the internal cooling channel 21 to dissipate heat from the inside of the rotating shaft body 2. This works in conjunction with the spiral fins 3 to achieve simultaneous heat dissipation from the inside and outside of the rotating shaft body 2.

[0023] In summary, when a car starts, the operation of various components generates a large amount of heat. At this time, the fan installed on the heat source side starts, and the motor drives the rotating shaft body 2 to rotate through the connection end 1. At this time, the spiral fins 3 rotate synchronously with the rotating shaft body 2, disturbing the air around the rotating shaft body 2, causing the air around the rotating shaft body 2 to flow faster and accelerate the heat dissipation of the surface of the rotating shaft body 2.

[0024] Example 2, refer to Figure 1 - Figure 4This is the second embodiment of the present invention. Unlike the previous embodiment, it provides a specific structure for the self-driven cooling unit 4 in the rotating shaft of an automotive fan with heat dissipation function. Compared to embodiment 1, the self-driven cooling unit 4 further includes a micro fan blade 41 disposed on the inner cooling channel 21, a connecting frame 42 disposed on the micro fan blade 41, and an inner cooling assembly 43 rotatably connected at both ends to the micro fan blade 41 and the connecting end 1, respectively. The micro fan blade 41 rotates to draw air into the inner cooling channel 21. The connecting frame 42 provides support for the micro fan blade 41 and fixes it at the port of the inner cooling channel 21. The inner cooling assembly 43 uses the kinetic energy of the air input into the inner cooling channel 21 by the micro fan blade 41 to rotate in conjunction with the rotation of the rotating shaft body 2, accelerating the airflow and thus accelerating heat dissipation from the inner wall of the inner cooling channel 21.

[0025] The inner wall of the internal cooling channel 21 is provided with a limiting groove 22 that cooperates with the connecting frame 42. The limiting groove 22 is used for the connecting frame 42 to slide into the internal cooling channel 21 through the limiting groove 22. At the same time, the connecting frame 42 and the limiting groove 22 cooperate to fix the micro fan blade 41 at the end of the internal cooling channel 21. With this arrangement, the micro fan blade 41 rotates synchronously with the rotation of the rotating shaft body 2, and continuously inputs air into the internal cooling channel 21.

[0026] The inner wall of the rotating shaft body 2 is provided with a spiral guide strip 23. The spiral guide strip 23 is used to rotate in conjunction with the rotation of the rotating shaft body 2, to integrate and guide the airflow input into the internal cooling channel 21 by the micro fan blades 41, so that the airflow passing through the internal cooling channel 21 is rotated by the action of the spiral guide strip 23.

[0027] The rest of the structure is the same as in Example 1.

[0028] In summary, when the motor drives the shaft body 2 to rotate through the connecting end 1, the miniature fan blade 41 rotates synchronously with the shaft body 2 through the cooperation of the connecting frame 42 and the limiting slide groove 22. The rotation of the miniature fan blade 41 drives air into the internal cooling channel 21. At this time, the spiral guide strip 23 rotates, integrates the airflow entering the internal cooling channel 21 and drives the airflow to rotate. The rotating airflow passes through the internal cooling channel 21 to dissipate heat on the inner wall of the internal cooling channel 21. At this time, the rotating airflow in the internal cooling channel 21 generates a tangential force on the internal cooling component 43, driving the internal cooling component 43 to rotate. The rotation of the internal cooling component 43 further accelerates the airflow velocity in the internal cooling channel 21, improving the heat dissipation effect on the shaft body 2.

[0029] Example 3, referring to Figure 1 - Figure 5This is the second embodiment of the present invention. Unlike the previous embodiment, it provides a specific structure for the internal cooling component 43 in the rotating shaft of an automotive fan with heat dissipation function. Compared to embodiment 2, the internal cooling component 43 further includes a conical section 431 rotatably mounted on the micro fan blade 41, a conical section 431 disposed at one end of the conical section 431 and rotatably connected to the connecting end 1, and a spiral guide groove 433 disposed on the conical section 431 and the cylindrical section 432. The conical section 431 is used to increase the axial force of the airflow on the internal cooling component 43, and the cylindrical section 432 is used to reduce the gap between the internal cooling channel 21 and the corresponding cross-section of the internal cooling component 43, allowing the airflow to enter the cylindrical section 432 from the conical section 431. During the 432 stage, the flow space is reduced, which increases the airflow pressure and accelerates the airflow velocity. The internal cooling component 43 is used to cooperate with the airflow blowing towards the internal cooling component 43. Through the action of the airflow and the spiral guide groove 433, a tangential force is generated on the spiral guide groove 433, which further accelerates the overall rotation of the internal cooling component 43. At this time, the spiral guide bar 23 and the spiral guide groove 433 rotate, causing the gaps at various points of the compression chamber 6 to change continuously, causing the airflow to generate turbulence and enhancing the heat exchange effect of the air on the inner wall of the internal cooling channel 21.

[0030] The gap between the conical section 431 and the internal cooling channel 21 is set as the air intake chamber 5, and the gap between the cylindrical section 432 and the internal cooling channel 21 is set as the compression chamber 6. The air intake chamber 5 is used to cooperate with the micro fan blades 41 to allow air to enter the internal cooling channel 21, and the compression chamber 6 is used to reduce the air flow space in the internal cooling channel 21, thereby pressurizing and accelerating the air flow and enhancing the heat exchange effect.

[0031] The internal cooling channel 21 is also provided with a through hole 24 that penetrates the rotating shaft body 2. The through hole 24 is used for the air carrying heat in the internal cooling channel 21 to leave the internal cooling channel 21.

[0032] The rest of the structure is the same as in Example 2.

[0033] In summary, when the micro fan blade 41 rotates along with the rotating shaft body 2, it draws external air into the internal cooling channel 21. The rotating spiral guide strip 23 then integrates and guides the air entering the internal cooling channel 21, forming a rotating airflow. This rotating airflow impacts the surface of the conical section 431. Under the action of the spiral guide groove 433, the entire internal cooling assembly 43 is subjected to a tangential force, causing the entire internal cooling assembly 43 to rotate. Under the action of rotation, the relative position of the spiral guide groove 433 and the spiral guide strip 23 changes continuously, causing the intake chamber 5 and the compression chamber 6 under the same cross-section to change continuously, driving the airflow to be generated continuously, improving the heat exchange effect on the inner wall of the internal cooling channel 21. The airflow in the internal cooling channel 21 flows from the intake chamber 5 through the compression chamber 6, increasing the flow rate and accelerating the discharge of heat through the through hole 24 into the internal cooling channel 21.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fan shaft for automobiles with heat dissipation function, characterized in that: It includes a connecting end (1), a rotating shaft body (2) disposed on the connecting end (1), a spiral fin (3) disposed in the middle section of the rotating shaft body (2), and a self-driving heat dissipation unit (4) disposed on the rotating shaft body (2). The rotating shaft body (2) is provided with an internal cooling channel (21) that works with the self-driven heat dissipation unit (4); the self-driven heat dissipation unit (4) includes a miniature fan blade (41) provided on the internal cooling channel (21), a connecting frame (42) provided on the miniature fan blade (41), and an internal cooling component (43) that is rotatably connected to the miniature fan blade (41) and the connecting end (1) at both ends respectively.

2. The automotive fan shaft with heat dissipation function as described in claim 1, characterized in that: The inner wall of the internal cooling channel (21) is provided with a limiting groove (22) that matches the connecting bracket (42).

3. The automotive fan shaft with heat dissipation function as described in claim 1, characterized in that: A spiral guide bar (23) is provided on the inner wall of the rotating shaft body (2).

4. The automotive fan shaft with heat dissipation function as described in claim 2, characterized in that: A spiral guide bar (23) is provided on the inner wall of the rotating shaft body (2).

5. The automotive fan shaft with heat dissipation function as described in claim 3, characterized in that: The internal cooling assembly (43) includes a conical section (431) rotatably mounted on a micro fan blade (41), a conical section (431) mounted at one end of the conical section (431) and rotatably connected to the connecting end (1), and a spiral guide groove (433) mounted on the conical section (431) and the cylindrical section (432).

6. The automotive fan shaft with heat dissipation function as described in claim 4, characterized in that: The internal cooling assembly (43) includes a conical section (431) rotatably mounted on a micro fan blade (41), a conical section (431) mounted at one end of the conical section (431) and rotatably connected to the connecting end (1), and a spiral guide groove (433) mounted on the conical section (431) and the cylindrical section (432).

7. The automotive fan shaft with heat dissipation function as described in claim 5, characterized in that: The gap between the conical section (431) and the internal cooling channel (21) is set as the air intake chamber (5), and the gap between the cylindrical section (432) and the internal cooling channel (21) is set as the compression chamber (6).

8. The automotive fan shaft with heat dissipation function as described in claim 6, characterized in that: The gap between the conical section (431) and the internal cooling channel (21) is set as the air intake chamber (5), and the gap between the cylindrical section (432) and the internal cooling channel (21) is set as the compression chamber (6).

9. The automotive fan shaft with heat dissipation function as described in claim 7, characterized in that: The internal cooling channel (21) is also provided with a through hole (24) that penetrates the rotating shaft body (2).

10. The automotive fan shaft with heat dissipation function as described in claim 8, characterized in that: The internal cooling channel (21) is also provided with a through hole (24) that penetrates the rotating shaft body (2).

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