Efficient cooling fan with hollow shaft

Abstract

The efficient cooling fan with the hollow shaft comprises a machine shell, a rotor assembly and a stator assembly, the rotor assembly comprises a rotating shaft and a magnetic ring, the rotating shaft is a hollow shaft, the magnetic ring is fixedly installed on the rotating shaft, the rotor assembly is arranged in an inner cavity of the stator assembly, and the rotor assembly is arranged in the inner cavity of the stator assembly. The hollow shaft is used for allowing cooled objects such as optical fibers to pass through, rapid cooling of the objects to be cooled is achieved through the double effects of heat conduction and air flowing, the technical problems that an existing laser optical fiber cooling device is large in occupied space, low in cooling efficiency and poor in cooling effect are solved, and the laser optical fiber cooling device has the advantages of being rapid in cooling and good in cooling effect.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed fans, and in particular to a high-efficiency heat dissipation fan with a hollow shaft. Background Art

[0002] High-speed fans use high-speed brushless motors, and their speed is usually more than 100,000 revolutions per minute, or even higher. They not only have application prospects in small household appliances, but are also gradually being used in other fields. In some special fiber optic application fields, such as high-power fiber lasers, since extremely high-power laser beams are transmitted through optical fibers, part of the laser energy is converted into heat inside the optical fiber, causing the fiber temperature to rise. If the heat is not properly handled, it may cause the optical performance of the optical fiber to deteriorate, such as changing the refractive index distribution, affecting the laser transmission efficiency, and even damaging the optical fiber. Therefore, in such fiber optic devices for high-power laser applications, corresponding heat sinks or coolant circulation systems will be equipped to remove heat and ensure the normal operation of the optical fiber. However, traditional heat dissipation methods not only require a large space, but also have low cooling efficiency, and are not effective for the heat dissipation of laser optical fibers. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a high-efficiency heat dissipation fan with a hollow shaft, which solves the technical problems that the existing laser optical fiber heat dissipation equipment occupies a large space, has low heat dissipation and cooling efficiency, and has poor heat dissipation effect.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a high-efficiency heat dissipation fan with a hollow shaft, including a casing, a rotor assembly, and a stator assembly. The rotor assembly includes a rotating shaft and a magnetic ring. The rotating shaft is a hollow shaft. The magnetic ring is fixedly installed on the rotating shaft. The rotor assembly is arranged in the internal cavity of the stator assembly.

[0005] Preferably, the casing comprises an inner casing and an outer casing, an air duct is provided between the inner casing and the outer casing, static air guide blades are provided in the air duct, a stator mounting cavity is provided in the inner casing or the outer casing, and the stator assembly is installed in the stator mounting cavity.

[0006] Preferably, it further comprises a fan blade, wherein the fan blade is fixedly mounted on one end of the rotating shaft, and the magnetic ring is mounted on the other end of the rotating shaft.

[0007] Preferably, it further comprises a blade cover, wherein the clearance between the inner wall of the blade cover and the blade of the fan blade is 0.0-.0mm, and the shape of the inner wall of the blade cover is adapted to the outer contour of the moving blade of the fan blade.

[0008] Preferably, the blades of the fan blades adopt a semi-open chaotic fan blade integrated design.

[0009] Preferably, the inner shell has a bearing chamber, and the bearing chamber is used to place bearings, and the number of the bearings is at least two.

[0010] Preferably, a bearing sleeve is arranged between the bearings.

[0011] Preferably, the static air guide blades include at least one group of pressure diffuser static blades, and the pressure diffuser static blades enable the wind flow area of ​​the air duct to gradually increase from the air inlet end to the air outlet end.

[0012] Preferably, the static air guide blades include a first static blade and a second static blade, and the air inlet end of the second static blade is staggered with the air outlet end of the first static blade, so that the wind flow area of ​​the air duct gradually increases from the air inlet end to the air outlet end.

[0013] Preferably, it further comprises an end cover and a bearing, wherein the end cover and the inner shell are respectively provided with a bearing chamber, wherein bearings are respectively placed in the bearing chamber, and the stator assembly is arranged between the bearings.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a high-efficiency heat dissipation fan with a hollow shaft, comprising a casing, a rotor assembly, and a stator assembly. The rotor assembly comprises a rotating shaft and a magnetic ring. The rotating shaft is a hollow shaft, and the magnetic ring is fixedly mounted on the rotating shaft. The rotor assembly is arranged in the internal cavity of the stator assembly. The hollow shaft is used for cooled objects such as optical fibers to pass through. Through the dual effects of heat conduction and air flow, the rapid cooling of the objects to be cooled is achieved, thereby solving the technical problems of large space occupation, low heat dissipation and cooling efficiency, and poor heat dissipation effect of existing laser optical fiber heat dissipation equipment, and having the beneficial effect of fast heat dissipation and good cooling effect. At the same time, pressure diffusion static blades are arranged in the casing air duct, so that the wind flow area of ​​the air duct increases from the air inlet to the air outlet. According to relevant fluid mechanics principles such as the fluid continuity equation and the Bernoulli equation, the air flow velocity at the inlet is relatively fast and the pressure is relatively low. As the wind flow cross-sectional area continues to expand, the air flow velocity gradually decreases, while the static pressure gradually increases, so that the air volume is the largest at the air outlet position, thereby improving the overall efficiency of the fan and achieving better heat dissipation and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 A cross-sectional view of a high-efficiency heat dissipation fan with a hollow shaft according to the present invention is shown.

[0017] Figure 2 A cross-sectional view of a casing JJ of a high-efficiency heat dissipation fan with a hollow shaft according to the present invention is shown.

[0018] Figure 3 A schematic diagram of a fan blade of a high-efficiency heat dissipation fan with a hollow shaft according to the present invention is shown.

[0019] Figure 4 A cross-sectional view of a fan blade cover of a high-efficiency heat dissipation fan with a hollow shaft according to the present invention is shown.

[0020] Figure numerals: 1-casing; 11-inner casing; 111-bearing chamber; 12-outer casing; 13-static air guide blade; 131-first static blade; 132-second static blade; 2-rotor assembly; 21-rotating shaft; 22-magnetic ring; 3-stator assembly; 4-fan blade; 41-base; 42-moving blade; 5-fan blade cover; 6-bearing; 7-bearing sleeve. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 See also Figures 1 to 4, a high-efficiency heat dissipation fan with a hollow shaft comprises a casing 1, a rotor assembly 2, a stator assembly 3, a fan blade 4, and a fan blade cover 5, wherein the rotor assembly 2 is arranged in the internal cavity of the stator assembly 3, the rotor assembly 2 comprises a rotating shaft 21 and a magnetic ring 22, the rotating shaft 21 is a hollow shaft, and the hollow shaft is used for the cooled objects to pass through, and the objects to be cooled are rapidly cooled through the dual effects of heat conduction and air flow; the fan blade 4 is fixedly mounted on one end of the rotating shaft 21, and the magnetic ring 22 is mounted on the other end of the rotating shaft 21; the casing 1 comprises an inner casing 11 and an outer casing 12, and an air duct is provided between the inner casing 11 and the outer casing 12, and a static air guide blade 13 is arranged in the air duct, and a stator mounting cavity is provided in the inner casing 11 or the outer casing 12, and the stator assembly 3 is mounted in the stator mounting cavity; the moving blade 42 of the fan blade 4 adopts a semi-open chaotic fan blade integrated design, that is, the base 41 of the fan blade 4 is The concave curve rotates around the axis to form a rotating body structure, the moving blades 42 of the fan blade 4 are twistedly arranged along the outer surface of the base 41 from the air inlet end to the air outlet end, the blades of the semi-open mixed flow fan are designed as an integrated unit, the blades are high in strength, and can operate at a high speed. The pressure generated by the fan is proportional to the square of the speed, which can greatly increase the static pressure of the fan. The high-speed fan can increase the frequency of aerodynamic noise generated by the blades, raise the frequency to above 15KHz, and improve the audio and noise values; the end of the moving blade 42 farthest from the rotation axis forms the outer contour of the moving blade, the inner wall shape of the fan cover 5 is adapted to the outer contour of the moving blade 42 of the fan blade 4, and the inner wall of the fan cover 5 and the moving blade 42 of the fan blade 4 have a matching clearance of 0.02mm, and the inner shell 11 has a bearing chamber 111, the bearing chamber 111 is used to place the bearing 6, the number of the bearings 6 is at least two, and a bearing sleeve 7 is arranged between the bearings 6.

[0023] Furthermore, the static air guide blade 13 includes a group of pressure diffuser static blades, and the pressure diffuser static blades gradually increase the cross-sectional area of ​​the air passage from the air inlet end to the air outlet end. Specifically, the static air guide blade 13 includes a first static blade 131 and a second static blade 132, and the air inlet end of the second static blade 132 is staggered with the air outlet end of the first static blade 131, so that the cross-sectional area of ​​the air passage from the air inlet end to the air outlet end gradually increases. The pressure diffuser principle is that the cross-sectional area of ​​the air passage gradually increases from the inlet to the outlet, and such a structural design is intended to achieve a specific flow state change and energy conversion of the airflow. According to the fluid continuity equation and the Bernoulli equation and other related fluid mechanics principles, the airflow velocity at the inlet is relatively fast and the pressure is relatively low. As the cross-sectional area of ​​the air passage continues to expand, the airflow velocity gradually decreases, while the static pressure gradually increases. In this way, the pressure diffuser can convert a high-speed, low-static-pressure airflow into a low-speed, high-static-pressure airflow, and the air volume of the airflow increases, thereby improving the overall efficiency of the fan.

[0024] Example 2 In another embodiment, a high-efficiency heat dissipation fan with a hollow shaft includes a casing, a rotor assembly, a stator assembly, a fan blade, a fan blade cover, a bearing and an end cover, the casing includes an inner casing and an outer casing, an air passage is formed between the inner casing and the outer casing, a static air guide blade is arranged in the air passage, a stator mounting cavity is provided in the inner casing or the outer casing, the stator assembly is installed in the stator mounting cavity; bearing chambers are respectively provided in the end cover and the inner casing for placing the bearings, the stator assembly is arranged between two of the bearings, the rotor assembly is arranged in the internal cavity of the stator assembly, the rotor assembly includes a rotating shaft and a magnetic ring, the rotating shaft is a hollow shaft, the hollow shaft is used for cooled objects to pass through, and the rapid cooling of the objects to be cooled is achieved through the dual effects of heat conduction and air flow.

[0025] Furthermore, the fan blade is fixedly mounted at one end of the rotating shaft, and the magnetic ring is mounted at the other end of the rotating shaft; the blades of the fan blade adopt a semi-open chaotic fan blade integrated design, that is, the base of the fan blade is a rotating body structure formed by rotating an inner concave curve around the axis, and the moving blades of the fan blade are twistedly arranged along the outer surface of the base from the air inlet end to the air outlet end, and the end of the moving blade farthest from the rotating axis forms the outer contour of the moving blade, the inner wall shape of the fan blade cover is adapted to the outer contour of the blade of the fan blade, and the matching clearance between the inner wall of the fan blade cover and the blade of the fan blade is 1.0mm.

[0026] Furthermore, the static wind guide blades include a group of diffuser static blades, and the diffuser static blades gradually increase the cross-sectional area of ​​the wind passage from the air inlet end to the air outlet end. Specifically, the thickness of a single blade of the diffuser static blade gradually becomes thinner from the air inlet end to the air outlet end, so that the cross-sectional area of ​​the wind passage from the air inlet end to the air outlet end gradually increases. According to relevant fluid mechanics principles such as the fluid continuity equation and the Bernoulli equation, as the cross-sectional area of ​​the wind passage continues to expand, the flow rate of the airflow will decrease accordingly, and the static pressure energy of the gas will increase accordingly. In this way, the diffuser air duct can convert a high-speed, low-static-pressure airflow into a low-speed, high-static-pressure airflow, thereby increasing the air volume and improving the overall efficiency of the fan.

[0027] The above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many similar modifications. All modifications that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the scope of protection of the present invention.

Claims

1. A high-efficiency heat dissipation fan with a hollow shaft, characterized in that: The invention comprises a housing (1), a rotor assembly (2), and a stator assembly (3); the rotor assembly (2) comprises a rotating shaft (21) and a magnetic ring (22); the rotating shaft (21) is a hollow shaft; the magnetic ring (22) is fixedly mounted on the rotating shaft (21); and the rotor assembly (2) is arranged in an internal cavity of the stator assembly (3).

2. The high-efficiency heat dissipation fan with a hollow shaft according to claim 1, characterized in that: The housing (1) comprises an inner housing (11) and an outer housing (12); an air duct is provided between the inner housing (11) and the outer housing (12); static air guide blades (13) are provided in the air duct; a stator installation cavity is provided in the inner housing (11) or the outer housing (12); and the stator assembly (3) is installed in the stator installation cavity.

3. The high-efficiency heat dissipation fan with a hollow shaft according to claim 1, characterized in that: It also comprises a fan blade (4), wherein the fan blade (4) is fixedly mounted on one end of the rotating shaft (21), and the magnetic ring (22) is mounted on the other end of the rotating shaft (21).

4. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 3, characterized in that: It also comprises a fan blade cover (5), wherein the clearance between the inner wall of the fan blade cover (5) and the blade of the fan blade (4) is 0.02-1.0 mm, and the shape of the inner wall of the fan blade cover (5) is matched with the outer contour of the moving blade (42) of the fan blade (4).

5. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 3, characterized in that: The blades of the fan blade (4) adopt a semi-open chaotic fan blade integrated design.

6. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 2, characterized in that: The inner shell (11) has a bearing chamber (111), and the bearing chamber (111) is used to place a bearing (6), and the number of the bearings (6) is at least two.

7. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 6, characterized in that: A bearing sleeve (7) is arranged between the bearings (6).

8. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 2, characterized in that: The static air guide blades (13) include at least one group of pressure diffuser static blades, and the pressure diffuser static blades enable the air flow area of ​​the air duct to gradually increase from the air inlet end to the air outlet end.

9. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 2, characterized in that: The static air guide blades (13) comprise a first static blade (131) and a second static blade (132), wherein an air inlet end of the second static blade (132) and an air outlet end of the first static blade (131) are arranged alternately, so that the air flow area of ​​the air duct gradually increases from the air inlet end to the air outlet end.

10. The high-efficiency heat dissipation fan with a hollow shaft as claimed in claim 2, characterized in that: It also includes an end cover and a bearing. The end cover and the inner shell are respectively provided with bearing chambers. Bearings are respectively placed in the bearing chambers. The stator assembly is arranged between the bearings.

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