Efficient cooling fan with hollow shaft

Abstract

The utility model discloses an efficient heat dissipation fan with a hollow shaft, which comprises 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, the magnetic ring is fixedly arranged 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 utility model relates to the technical field of high -speed fan especially, a kind of high -efficient heat dissipation fan with hollow shaft. BACKGROUND

[0002] High-speed fan adopts high-speed brushless motor, speed is usually above 100,000 revolutions per minute, even higher, not only in small household appliances has application prospect, and gradually be used in other fields.In some special optical fiber application field, such as high-power fiber laser, since the laser beam of extremely high power is transmitted through optical fiber, laser energy will be partly converted into heat in optical fiber, causing the temperature of optical fiber to rise.If heat cannot be properly handled, it can cause the optical performance of optical fiber to deteriorate, such as changing the refractive index distribution, affecting the transmission efficiency of laser, and even possibly damaging the optical fiber.So in the optical fiber device of this high-power laser application, corresponding heat sink or cooling liquid circulation system is equipped to take away heat, to protect the normal work of optical fiber.But the traditional heat dissipation mode not only needs to occupy large space, and cooling efficiency is low, and the heat dissipation effect of the optical fiber of laser is not good. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a kind of high -efficient heat dissipation fan with hollow shaft, solve the technical problems that the space of existing laser optical fiber heat dissipation equipment is large, cooling efficiency is low, and the heat dissipation effect is not good.

[0004] The utility model discloses a kind of high -efficient heat dissipation fan with hollow shaft, including shell, rotor assembly, stator assembly, the rotor assembly includes shaft and magnetic ring, the shaft is hollow shaft, the magnetic ring is fixedly installed on the shaft, the rotor assembly is set in the internal cavity of the stator assembly.

[0005] As preferably, the shell includes inner shell and outer shell, the inner shell and outer shell are air duct, static guide vane is arranged in the air duct, the inner shell or the outer shell has stator installation cavity, the stator assembly is installed in the stator installation cavity.

[0006] As preferably, it further includes fan blade, the fan blade is fixedly installed at one end of the shaft, and the magnetic ring is installed at the other end of the shaft.

[0007] As preferably, it further includes fan blade cover, the inner wall of the fan blade cover and the blade of the fan blade cooperate clearance is 0.0-.0mm, and the inner wall shape of the fan blade cover is adapted to the outer profile of the moving blade of the fan blade.

[0008] As preferably, the blade of the fan blade adopts half-open type chaotic fan blade integrated design.

[0009] As preferably, the inner shell has bearing rooms for placing bearings, and the number of bearings is at least two.

[0010] As preferably, bearing sleeves are arranged between the bearings.

[0011] As preferably, the static guide blade comprises at least one set of diffuser vanes, which gradually increase the air passing area of the air duct from the air inlet end to the air outlet end.

[0012] As preferably, the static guide blade comprises 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 air passing area of the air duct gradually increases from the air inlet end to the air outlet end.

[0013] As preferably, an end cover and bearings are further included, the end cover and the inner shell are respectively provided with bearing rooms, and the bearings are respectively placed in the bearing rooms, and the stator assembly is arranged between the bearings.

[0014] Compared with the prior art, the high-efficiency heat dissipation fan with a hollow shaft has the following beneficial effects:

[0015] The utility model discloses a kind of high-efficiency heat dissipation fans with hollow shaft, including shell, rotor assembly, stator assembly, the rotor assembly includes shaft and magnetic ring, the shaft is hollow shaft, the magnetic ring is fixedly installed on the shaft, the rotor assembly is arranged in the internal cavity of the stator assembly, the hollow shaft is used for being cooled article such as optical fiber passes, by the double effect of heat conduction and air flow, the rapid cooling of the article to be cooled is realized, solve the technical problem that existing laser optical fiber heat dissipation equipment occupies large space, heat dissipation cooling efficiency is low, and heat dissipation effect is not good, with the beneficial effect that heat dissipation cooling is fast and good effect;Air passing area of wind duct is increased from air inlet to air outlet, according to fluid continuity equation and Bernoulli equation and other related fluid mechanics principles, air flow speed is relatively fast, pressure is relatively low at inlet, with air passing cross-sectional area expanding constantly, air flow speed gradually reduces, and static pressure gradually increases, so that air volume is maximum at air outlet position, improve the overall efficiency of fan, so that heat dissipation cooling effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description.

[0017] Fig. 1 The utility model discloses the cross-sectional view of high-efficiency heat dissipation fan with hollow shaft.

[0018] Fig. 2The J-J section view of the high-efficiency heat dissipation fan with hollow shaft.

[0019] Fig. 3 The fan blade schematic view of the high-efficiency heat dissipation fan with hollow shaft.

[0020] Fig. 4 The fan blade cover section view of the high-efficiency heat dissipation fan with hollow shaft.

[0021] Label: 1 - machine shell; 11 - inner shell; 111 - bearing chamber; 12 - outer shell; 13 - static guide vane; 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 - dynamic blade; 5 - fan blade cover; 6 - bearing; 7 - bearing sleeve. DETAILED DESCRIPTION

[0022] The utility model is further illustrated below in combination with the drawings and specific embodiments, but the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0023] Embodiment 1

[0024] Please refer to Figs. 1 to 4The utility model provides a high -efficient heat dissipation fan with hollow shaft, including casing 1, rotor subassembly 2, stator subassembly 3, fan blade 4, fan blade cover 5, the rotor subassembly 2 is arranged in the internal cavity of stator subassembly 3, the rotor subassembly 2 includes rotary shaft 21 and magnetic ring 22, the rotary shaft 21 is hollow shaft, and the hollow shaft is used for being passed through the cooling article, and through the double effects of heat conduction and air flow, the rapid cooling of the article to be cooled is realized, the fan blade 4 is fixedly installed in one end of the rotary shaft 21, the magnetic ring 22 is installed in the other end of the rotary shaft 21, the casing 1 includes inner shell 11 and outer shell 12, and the wind channel between the inner shell 11 and the outer shell 12 is set up, and the wind channel is provided with static guide vane 13, the inner shell 11 or the outer shell 12 has stator installation cavity, and the stator subassembly 3 is installed in the stator installation cavity, the moving blade 42 of fan blade 4 adopts half open type chaotic fan blade integrated design, namely the base 41 of fan blade 4 is the rotation body structure formed by the concave curve rotation around the shaft, and the moving blade 42 of fan blade 4 is set up along the outer surface of the base 41 from the air inlet end to the air outlet end in the twist type, and the blade integrated design of half open type chaotic fan blade is high in blade strength, can be operated under high speed, and the pressure of fan is directly proportional to the square of rotating speed, can greatly improve the static pressure of fan, and high-speed fan can improve the frequency of aerodynamic noise of blade, and the frequency is above 15KHz, improves audio frequency and noise value, the end of the moving blade 42 farthest from the rotating shaft forms the outer contour of the moving blade, the inner wall shape of fan blade cover 5 is adapted to the outer contour of the moving blade 42 of fan blade 4, the cooperation clearance between the inner wall of fan blade cover 5 and the moving blade 42 of fan blade 4 is 0.02mm, the inner shell 11 has bearing chamber 111, the bearing chamber 111 is used to place bearing 6, the number of bearing 6 is at least two, and bearing sleeve 7 is arranged between the bearing 6.

[0025] Further, the static guide vane 13 includes a group of diffuser vanes, and the diffuser vanes gradually increase the cross-sectional area of the air passage from the air inlet end to the air outlet end. Specifically, the static guide vane 13 includes a first static vane 131 and a second static vane 132, and the air inlet end of the second static vane 132 is staggered with the air outlet end of the first static vane 131, so that the cross-sectional area of the air passage gradually increases from the air inlet end to the air outlet end. The diffuser principle is that the cross-sectional area of the air passage gradually increases from the inlet to the outlet. According to the related fluid mechanics principles such as the fluid continuity equation and the Bernoulli equation, the air flow speed is relatively fast and the pressure is relatively low at the inlet, and as the cross-sectional area of the air passage continuously expands, the air flow speed gradually decreases and the static pressure gradually increases. In this way, the diffuser air passage can convert high-speed low-static-pressure air flow into low-speed high-static-pressure air flow, increase the air flow, and improve the overall efficiency of the fan.

[0026] Embodiment 2

[0027] In another embodiment, a high-efficiency heat dissipation fan with a hollow shaft comprises a casing, a rotor assembly, a stator assembly, a fan blade, a fan blade cover, a bearing and an end cover, the casing comprises an inner casing and an outer casing, a through air passage is formed between the inner casing and the outer casing, static guide vanes are arranged in the through air passage, the inner casing or the outer casing is provided with a stator mounting cavity, the stator assembly is mounted in the stator mounting cavity; the end cover and the inner casing are respectively provided with a bearing chamber for placing the bearing, the stator assembly is arranged between the two bearings, the rotor assembly is arranged in an inner cavity of the stator assembly, the rotor assembly comprises a rotating shaft and a magnetic ring, the rotating shaft is a hollow shaft, the hollow shaft is used for passing through the cooled object, and rapid cooling of the object to be cooled is realized through the double effects of heat conduction and air flow.

[0028] Further, 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 fan blade adopts a semi-open chaotic fan blade integrated design, that is, a base of the fan blade is a rotating body structure formed by an inner concave curve rotating around an axis, and a moving blade of the fan blade is arranged in a twisted manner along an outer surface of the base from an air inlet end to an air outlet end, an end of the moving blade farthest from the rotating shaft forms an outer contour of the moving blade, an inner wall of the fan blade cover is matched with the outer contour of the moving blade, and a gap between the inner wall of the fan blade cover and the moving blade of the fan blade is 1.0 mm.

[0029] Further, the static guide vanes comprise a group of diffuser vanes, the diffuser vanes gradually increase a cross-sectional area of the through air passage from an air inlet end to an air outlet end. Specifically, a thickness of a single vane of the diffuser vanes gradually decreases from the air inlet end to the air outlet end, so that the cross-sectional area of the through air passage gradually increases from the air inlet end to the air outlet end. According to a fluid continuity equation and a Bernoulli equation and other related fluid mechanics principles, as the cross-sectional area of the through air passage continuously expands, a flow velocity of the airflow correspondingly decreases, and a static pressure energy of the gas correspondingly increases. In this way, the diffuser air duct can convert the high-speed low-static-pressure airflow into the low-speed high-static-pressure airflow, the airflow volume is increased, and the overall efficiency of the fan is improved.

[0030] The above-mentioned are only specific embodiments of the present application. Apparently, the present application is not limited to the above-mentioned embodiments, and can have many similar modifications, and all modifications directly derived or thought by those skilled in the art from the content disclosed in the present application should be considered as the scope to be protected by the present application.

Claims

1. A high-efficiency heat-dissipating fan having a hollow shaft, characterized in that, The utility model provides a kind of wind turbine, including shell (1), rotor assembly (2), stator assembly (3), the rotor assembly (2) includes rotating shaft (21) and magnetic ring (22), the rotating shaft (21) is hollow shaft, the magnetic ring (22) is fixedly installed on the rotating shaft (21), the rotor assembly (2) is arranged in the internal cavity of the stator assembly (3).

2. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 1, wherein, The shell (1) includes inner shell (11) and outer shell (12), and a wind channel is formed between the inner shell (11) and the outer shell (12). The wind channel is provided with static guide vanes (13). The inner shell (11) or the outer shell (12) has a stator mounting cavity, and the stator assembly (3) is mounted in the stator mounting cavity.

3. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 1, wherein, The utility model further includes a fan blade (4) fixedly installed on one end of the rotating shaft (21), and the magnetic ring (22) is installed on the other end of the rotating shaft (21).

4. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 3, wherein, The utility model further includes a fan blade cover (5), the inner wall of the fan blade cover (5) and the blade of the fan blade (4) are matched with a gap of 0.02-1.0mm, and the inner wall shape 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 dissipating fan with a hollow shaft as recited in claim 3, wherein, The blade of the fan blade (4) adopts a semi-open chaotic fan blade integrated design.

6. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 2, wherein, The inner shell (11) has a bearing chamber (111) for placing bearings (6), and the number of bearings (6) is at least two.

7. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 6, wherein, A bearing sleeve (7) is arranged between the bearings (6).

8. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 2, wherein, The static guide vanes (13) include at least one set of diffuser vanes, and the diffuser vanes gradually increase the wind passage area of the wind channel from the air inlet end to the air outlet end.

9. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 2, wherein, The static guide vanes (13) include first static vanes (131) and second static vanes (132), and the air inlet end of the second static vanes (132) is staggered with the air outlet end of the first static vanes (131), so that the wind passage area of the wind channel gradually increases from the air inlet end to the air outlet end.

10. The high efficiency heat dissipating fan with a hollow shaft as recited in claim 2, wherein, The utility model further includes end covers and bearings, and the end covers and the inner shell are respectively provided with bearing chambers for placing bearings. The stator assembly is arranged between the bearings.

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