A fan

Abstract

The utility model discloses a fan relates to fan structure design technical field. This fan, include: main casing, heat dissipation subassembly and transmission component, transmission component is located in the main casing, and transmission component is connected with the main casing through heat dissipation subassembly, and the heat dissipation subassembly is carried out heat dissipation to the inside of main casing when transmission component operation. This fan, through the main casing provides the air duct flow direction for the fan, through heat dissipation subassembly accelerates the heat that the internal component of fan is produced when running and maintains the transmission component composition of fan operation. Transmission component is located in the main casing, for improving the heat dissipation efficiency, and transmission component is connected with the main casing through heat dissipation subassembly, and the heat dissipation subassembly is carried out heat dissipation to the inside of main casing when transmission component operation. Specifically, when transmission component operation, gas flows from the one side of fan to the other side along the axial, and when flowing gas passes through heat dissipation subassembly, the heat that transmission component produces is discharged from the one side of fan along with gas flow direction.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine structural design technology, and in particular to a wind turbine. Background Technology

[0002] Fans, as a type of general-purpose machine that relies on the rotation of an impeller to drive the flow of gas, are widely used in many fields such as ventilation, cooling, and air conditioning. Their core working principle is to drive the impeller to rotate at high speed through a transmission assembly, thereby giving the gas kinetic energy and enabling directional flow.

[0003] During the long-term operation of the fan, the transmission components generate a large amount of heat due to continuous mechanical movement. Simultaneously, the relatively enclosed space inside the main casing allows heat to easily accumulate. If heat cannot be dissipated effectively and promptly, the internal temperature of the main casing will continue to rise, affecting the operational stability and service life of the transmission components. For example, high temperatures may cause bearing performance degradation, exacerbate thermal deformation of the main shaft, and even trigger motor overload and other malfunctions. In severe cases, this can lead to fan shutdown, affecting the normal operation of the entire equipment system.

[0004] Existing fan cooling structures mostly employ simple heat sinks or independent fan designs. However, these have low cooling efficiency and struggle to quickly dissipate heat generated by internal heat-generating components. Independent fans require additional power, increasing structural complexity and energy consumption, and can also lead to cooling system failure due to fan malfunction. Furthermore, the connection structure between the transmission components and the main casing of existing fans often neglects the design of heat dissipation channels, resulting in poor airflow within the main casing and hindering timely heat dissipation. Additionally, stress concentration occurs in the connection methods between some fan components, such as bearing housings, and the main casing. During long-term operation, vibration and high temperatures can affect connection stability, further reducing cooling efficiency and equipment reliability.

[0005] It is evident that in existing technologies, the internal space of the fan is relatively enclosed, heat easily accumulates, heat dissipation efficiency is low, and it is difficult to quickly dissipate the heat generated by the internal heat-generating components. Utility Model Content

[0006] In view of this, the main purpose of this utility model is to provide a fan that can solve the problems in the prior art where the internal space of the fan is relatively closed, heat is easy to accumulate, heat dissipation efficiency is low, and it is difficult to quickly dissipate the heat generated by the internal heat-generating components.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0008] The fan includes a main housing, a heat dissipation assembly, and a transmission assembly. The transmission assembly is located inside the main housing and is connected to the main housing through the heat dissipation assembly. The heat dissipation assembly dissipates heat from the inside of the main housing when the transmission assembly is in operation.

[0009] In a preferred embodiment, the heat dissipation assembly includes a heat dissipation cylinder and a guide plate, wherein a plurality of the guide plates are distributed circumferentially along the heat dissipation cylinder, and the heat dissipation cylinder and the guide plate are integrally formed.

[0010] In a preferred embodiment, the heat dissipation cylinder includes: a first straight cylindrical portion and a first conical portion, wherein the first straight cylindrical portion and the first conical portion are integrally formed;

[0011] In a preferred embodiment, a connecting hole is provided on the end face of the first conical portion, and a first air inlet is provided on the end face of the first conical portion along the circumferential direction of the connecting hole, the first air inlet penetrating the end face of the first conical portion;

[0012] In a preferred embodiment, a plurality of the guide vanes are circumferentially arranged on the first straight cylindrical portion, the guide vanes extending from the end of the first straight cylindrical portion toward the first tapered portion, and the outer wall of the first straight cylindrical portion is integrally formed with one side of the guide vane;

[0013] In a preferred embodiment, the other side of the guide plate is fixedly connected to the inner wall of the main housing.

[0014] In a preferred embodiment, the heat dissipation assembly further includes: a front bearing housing, a rear bearing housing, and a thrust rear cover plate;

[0015] In a preferred embodiment, the front bearing housing is fixedly connected to the first tapered portion, and the two ends of the rear bearing housing are fixedly connected to the first straight cylindrical portion and the thrust rear cover plate, respectively.

[0016] In a preferred embodiment, the front bearing housing is fixedly connected to the first tapered portion, the side of the front bearing housing is tapered, and the connection between the tapered surface and the first tapered portion is an arc transition;

[0017] In a preferred embodiment, a front-end connecting hole is provided in the middle of the front-end bearing housing, and the front-end connecting hole passes through both ends of the front-end bearing housing;

[0018] In a preferred embodiment, a second air inlet is provided on the tapered surface along the circumferential direction of the front end connecting hole, and the second air inlet passes through the front end bearing seat.

[0019] In a preferred embodiment, the second air inlet is configured to communicate with the first air inlet.

[0020] In a preferred embodiment, a rear-end connecting hole is provided in the middle of the rear-end bearing housing, and the rear-end connecting hole passes through the rear-end bearing housing;

[0021] In a preferred embodiment, a first air inlet groove is provided on the surface of the rear bearing housing, and a first blind groove is provided between the first air inlet groove and the rear connecting hole, and the first blind groove is respectively connected to the first air inlet groove and the rear connecting hole.

[0022] In a preferred embodiment, a rear end limiting hole is provided on the surface of the rear end bearing housing, one end of the limiting post is fixedly connected to the rear end limiting hole, and the other end of the limiting post is fixedly connected to the thrust rear cover plate.

[0023] In a preferred embodiment, the thrust back cover includes: an end face and an extension, wherein the end face and the extension are integrally formed, and an extension cavity is formed at the connection between the end face and the extension.

[0024] In a preferred embodiment, a thrust connection hole is provided in the middle of the end face, and the thrust connection hole passes through the end face.

[0025] In a preferred embodiment, a second air inlet groove is provided on the surface of the end face, and a second blind groove is provided at the end near the rear bearing seat between the second air inlet groove and the thrust connection hole. The second blind groove is connected to the second air inlet groove and the thrust connection hole respectively.

[0026] In a preferred embodiment, a thrust limiting hole is provided on the surface of the thrust relief cover plate, and the thrust limiting hole is fixedly connected to one end of the limiting post.

[0027] In a preferred embodiment, the extension is fixedly connected to the rear bearing housing.

[0028] In a preferred embodiment, the main housing includes: a second straight cylindrical portion, a second tapered portion, and a protruding portion, wherein the two sides of the second tapered portion are integrally formed with the second straight cylindrical portion and the protruding portion, respectively;

[0029] In a preferred embodiment, the inner wall of the second straight section is fixedly connected to one side of the guide plate;

[0030] In a preferred embodiment, a first cable routing hole is provided on the side of the first straight cylindrical portion, the first cable routing hole passes through the side of the first straight cylindrical portion, and the first cable routing hole is fixedly connected to one side of the cable guide tube. A second cable routing hole is provided on the side of the second straight cylindrical portion, the second cable routing hole passes through the second straight cylindrical portion, and the other side of the cable guide tube extends into the second cable routing hole.

[0031] In a preferred embodiment, the transmission assembly includes: a main shaft, a thrust disc, and an impeller;

[0032] In a preferred embodiment, the main shaft includes a long main shaft and a short main shaft. One side of the long main shaft is fixedly connected to the short main shaft. The impeller is provided in the protrusion. The other side of the long main shaft extends out of the communicating hole and is fixedly connected to the impeller with the front end connecting hole. The impeller is fixedly connected with a flow guide cap.

[0033] In a preferred embodiment, the short spindle extends out of the rear end connection hole and the thrust connection hole respectively, and a thrust plate is provided in the extension cavity, the thrust plate being fixedly connected to the short spindle.

[0034] In a preferred embodiment, a motor is provided inside the first cylindrical section, and the main shaft is located inside the motor.

[0035] In a preferred embodiment, the long spindle has a connecting cavity inside, a magnet is provided in the connecting cavity, and a gasket is provided on the side of the magnet near the long spindle.

[0036] The fan of this utility model has the following beneficial effects:

[0037] The fan includes a main casing, a heat dissipation assembly, and a transmission assembly. The transmission assembly is located inside the main casing and is connected to the main casing through the heat dissipation assembly, which dissipates heat from the inside of the main casing when the transmission assembly is in operation.

[0038] This fan consists of a main casing that provides airflow, a heat dissipation assembly to accelerate the removal of heat generated by the internal components during operation, and a transmission assembly to maintain fan operation. The transmission assembly is located inside the main casing and is connected to the main casing via a heat dissipation assembly to improve heat dissipation efficiency. The heat dissipation assembly cools the interior of the main casing while the transmission assembly is operating. Specifically, when the transmission assembly operates, gas flows axially from one side of the fan to the other. As the flowing gas passes through the heat dissipation assembly, it enters the assembly. The heat generated by the transmission assembly is then expelled from the fan side along with the gas flow, thus continuously cooling the transmission assembly during operation. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a cross-sectional view of a fan according to one embodiment of the present disclosure;

[0041] Figure 2 This is a schematic diagram of the heat sink and guide plate of a fan according to one embodiment of the present disclosure;

[0042] Figure 3 This is a schematic diagram of the heat sink and guide plate of a fan according to one embodiment of the present disclosure from another perspective.

[0043] Figure 4 This is a schematic diagram of the heat dissipation assembly and transmission assembly of a fan according to one embodiment of the present disclosure;

[0044] Figure 5 This is a structural schematic diagram of the heat sink and guide plate of a fan according to one embodiment of the present disclosure from another perspective.

[0045] Figure 6 This is a schematic diagram of the structure of the front bearing housing of a fan according to one embodiment of the present disclosure;

[0046] Figure 7 This is a schematic diagram of the structure of the rear bearing housing of a fan according to one embodiment of the present disclosure;

[0047] Figure 8 This is a structural schematic diagram of the rear bearing housing of a fan according to one embodiment of the present disclosure from another perspective.

[0048] Figure 9 This is a structural schematic diagram of the thrust rear cover plate of a fan according to one embodiment of the present disclosure;

[0049] Figure 10 This is a structural schematic diagram of the thrust rear cover of a fan according to one embodiment of the present disclosure from another perspective.

[0050] Figure 11 This is a schematic diagram of the structure of a fan according to one embodiment of the present disclosure;

[0051] Figure 12 This is a structural schematic diagram of a fan according to one embodiment of the present disclosure from another perspective;

[0052] Figure 13 This is a schematic diagram of the main shaft of a fan according to one embodiment of the present disclosure;

[0053] Figure 14 This is a schematic diagram of the short main shaft of a fan according to one embodiment of the present disclosure;

[0054] Figure 15 A cross-sectional view of the short main shaft of a fan according to one embodiment of the present disclosure;

[0055] Figure 16 This is a schematic diagram of the thrust disc of a fan according to one embodiment of the present disclosure;

[0056] Figure 17 A cross-sectional view of the main shaft of a fan according to one embodiment of the present disclosure;

[0057] Figure 18 This is a schematic diagram of the structure of a fan within a casing according to one embodiment of the present disclosure.

[0058] [Explanation of Key Component Symbols]

[0059] 1. Main shell;

[0060] 11. Second straight section; 111. Second wiring hole;

[0061] 12. Second conical part; 13. Protruding part;

[0062] 2. Heat dissipation components;

[0063] 21. Heat sink;

[0064] 211, First straight section; 2111, First wiring hole;

[0065] 212, First tapered portion; 2121, Connecting hole; 2122, First air inlet;

[0066] 22. Deflector plate;

[0067] 23. Front bearing housing; 231. Tapered surface; 232. Front connecting hole; 2321. Second air inlet;

[0068] 24. Rear bearing housing; 241. Rear connecting hole; 242. First air inlet slot;

[0069] 243. First blind groove; 244. Rear end limiting hole;

[0070] 25. Thrust back cover;

[0071] 251, end face; 2511, thrust connection hole;

[0072] 252. Extension; 253. Second air inlet slot; 254. Second blind slot; 255. Thrust stop hole;

[0073] 3. Transmission components;

[0074] 31. Spindle;

[0075] 311, long spindle; 3111, connecting cavity;

[0076] 312. Short spindle;

[0077] 32. Thrust plate; 33. Impeller;

[0078] 4. Limiting post; 5. Conduit; 6. Flow guide cap;

[0079] 01. Extension cavity; 02. Motor; 03. Magnet; 04. Gasket. Detailed Implementation

[0080] The following description, in conjunction with the accompanying drawings and embodiments of the present invention, provides a more detailed account of a fan according to the present invention.

[0081] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0082] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0083] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0084] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0085] according to Figures 1-18 As shown, the fan includes: a main housing 1 providing airflow direction for the fan; a heat dissipation assembly 2 to accelerate the discharge of heat generated during the operation of internal components; and a transmission assembly 3 to maintain the operation of the fan. The transmission assembly 3 is located inside the main housing 1. To improve heat dissipation efficiency, the transmission assembly 3 is connected to the main housing 1 via the heat dissipation assembly 2. The heat dissipation assembly 2 dissipates heat from the interior of the main housing 1 when the transmission assembly 3 is in operation. Specifically, when the transmission assembly 3 is in operation, gas flows axially from one side of the fan to the other. When the flowing gas passes through the heat dissipation assembly 2, it enters the heat dissipation assembly 2. At this time, the heat generated by the transmission assembly 3 is discharged from one side of the fan along with the gas flow, thus continuously dissipating heat during the operation of the transmission assembly 3.

[0086] To increase the heat dissipation efficiency of the fan, the heat dissipation assembly 2 includes: a heat dissipation cylinder 21 with a built-in motor 02 and guide plates 22 that fix the heat dissipation cylinder 21 inside the main housing 1. Multiple guide plates 22 are distributed circumferentially along the heat dissipation cylinder 21, which can enhance the air supply capacity, increase the outlet pressure of the fan, and improve the heat dissipation efficiency. The integral molding of the heat dissipation cylinder 21 and the guide plates 22 can make the connection between the heat dissipation cylinder 21 and the main housing 1 more stable.

[0087] The heat sink 21 is further described below. The heat sink 21 includes a first straight cylindrical part 211 that enhances air delivery capacity and reduces the diffusion loss of the outlet airflow and a first conical part 212 that smoothly guides the airflow. The first straight cylindrical part 211 and the first conical part 212 are integrally formed to ensure a smooth transition at the connection.

[0088] To enable internal communication of the transmission assembly 3, a connecting hole 2121 is provided on the end face of the first conical portion 212, and a first air inlet 2122 is provided circumferentially along the connecting hole 2121 on the end face of the first conical portion 212, penetrating the end face of the first conical portion 212. Thus, when gas flows through, it can pass through the first air inlet 2122 and flow into the interior of the heat sink 21, thereby carrying away the heat generated by the motor 02 and the main shaft 31 during operation.

[0089] Multiple guide vanes 22 are circumferentially arranged on the first cylindrical portion 211 to provide a longer guiding path for the airflow, thereby increasing airflow stability and avoiding airflow turbulence. The guide vanes 22 extend from the end of the first cylindrical portion 211 toward the first tapered portion 212, and the outer wall of the first cylindrical portion 211 is integrally formed with one side of the guide vanes 22. The other side of the guide vanes 22 is fixedly connected to the inner wall of the main housing 1, for example, by welding. To improve the connection strength of the heat dissipation assembly 2 inside the main housing 1, in this specific embodiment, threaded holes are respectively provided on the main housing 1 and the heat dissipation cylinder 21. Screws pass through the threaded holes of the main housing 1 and extend into the threaded holes of the heat dissipation cylinder 21 for fixed connection.

[0090] In order to form a complete heat dissipation channel, the heat dissipation assembly 2 also includes: a front bearing housing 23 that provides an air inlet channel, a rear bearing housing 24 that provides an air outlet channel, and a thrust rear cover plate 25 near the exhaust port.

[0091] The front bearing housing 23 is fixedly connected to the first tapered portion 212 as a heat dissipation air inlet channel. The rear bearing housing 24 is fixedly connected at both ends to the first straight cylindrical portion 211 and the thrust rear cover plate 25, respectively. The first straight cylindrical portion 211 and the thrust rear cover plate 25 serve as heat dissipation air outlet channels. Correspondingly, to guide airflow and reduce inlet resistance, the side of the front bearing housing 23 is a tapered surface 231. The connection between the tapered surface 231 and the first tapered portion 212 is an arc-shaped transition to ensure a smooth transition at the connection point.

[0092] To allow one end of the main shaft 31 to extend, a front connecting hole 232 is provided in the middle of the front bearing housing 23, which extends through both ends of the front bearing housing 23. To allow airflow to enter the heat sink 21 when the fan is running, a second air inlet 2321 is provided on the tapered surface 231 along the circumference of the front connecting hole 232. The second air inlet 2321 extends through the front and rear of the front bearing housing 23, and is connected to the first air inlet 2122. That is, during installation, the second air inlet 2321 is aligned with the first air inlet 2122, so that gas can pass through the second air inlet 2321 and the first air inlet 2122 axially. Accordingly, to ensure that the front bearing housing 23 can be threadedly connected to the first tapered portion 212, threaded holes are respectively provided on the end faces of the second air inlet 2321 and the first tapered portion 212. The threaded holes are evenly distributed between the air inlets, and the screws pass through the first tapered portion 212 and the front bearing housing 23 to fix the screws. In order to install the other end of the spindle 31, a rear connecting hole 241 is provided in the middle of the rear bearing housing 24, and the rear connecting hole 241 passes through the rear bearing housing 24.

[0093] To allow heat to be expelled with the airflow, a first air inlet slot 242 is provided on the surface of the rear bearing housing 24. A first blind slot 243 is provided between the first air inlet slot 242 and the rear connecting hole 241, and the first blind slot 243 connects the first air inlet slot 242 and the rear connecting hole 241 respectively. When the fan is running, the air inlet holes distributed circumferentially have uneven air pressure due to differences in their positions, which affects the air intake efficiency and stability. After the first blind slot 243 connects all the first air inlet slots 242, it can form an internal pressure balance chamber, so that the air intake pressure of each hole tends to be consistent.

[0094] To facilitate connection, a rear-end limiting hole 244 is provided on the surface of the rear bearing housing 24 of the limiting post 4. The rear-end limiting hole 244 is fixedly connected to one end of the limiting post 4, and the other end of the limiting post 4 is fixedly connected to the thrust rear cover plate 25. The limiting post 4 can further improve the mutual fixation between the rear bearing housing 24 and the thrust rear cover plate 25, and at the same time, limit the thrust plate 32 set between them.

[0095] The thrust rear cover plate 25 is further described below. The thrust rear cover plate 25 includes an end face 251 near the fan exhaust port and an extension 252 connected to the main rear bearing housing 24. The end face 251 and the extension 252 are integrally formed, and an extension cavity 01 is formed at the connection between the end face 251 and the extension 252, providing installation space for the thrust plate 32. Correspondingly, a thrust connection hole 2511 is provided in the middle of the end face 251 to allow the main shaft 31 to extend. The thrust connection hole 2511 passes through the end face 251.

[0096] To allow airflow to exit from the heat sink 21 during fan operation, a second air inlet slot 253 is provided on the surface of the end face 251. A second blind slot 254 is provided between the second air inlet slot 253 and the thrust connection hole 2511 at the end near the rear bearing seat 24. The second blind slot 254 connects the second air inlet slot 253 and the thrust connection hole 2511. When the fan is running, the circumferentially distributed air inlets cause uneven air pressure due to their different positions, affecting air intake efficiency and stability. The second blind slot 254, by connecting all the second air inlets 253, forms an internal pressure balance chamber, making the air pressure of each inlet more uniform.

[0097] A thrust limiting hole 255 is provided on the surface of the thrust back cover plate 25. The thrust limiting hole 255 is fixedly connected to one end of the limiting post 4 to limit the thrust plate 32.

[0098] The extension 252 is fixedly connected to the rear bearing housing 24. To ensure that the rear bearing housing 24 can be threadedly connected to the heat sink 21 and the thrust rear cover plate 25 respectively, threaded holes are respectively provided on the end faces of the extension 252, the rear bearing housing 24, and the first straight cylindrical portion 211. The threaded holes pass through the rear bearing housing 24, and the screws pass through the thrust rear cover plate 25 and the rear bearing housing 24 respectively, and extend into the first straight cylindrical portion 211 to be fixed by screws.

[0099] To facilitate the fixing of the heat dissipation assembly 2, the main housing 1 includes: a second straight cylindrical portion 11, a second tapered portion 12, and a protruding portion 13. The two sides of the second tapered portion 12 are integrally formed with the second straight cylindrical portion 11 and the protruding portion 13, respectively.

[0100] To provide a cable routing channel and prevent cables from being exposed, tangled, or squeezed, and to ensure neat and orderly internal wiring, a first cable routing hole 2111 is provided on the side of the first cylindrical part 211. The first cable routing hole 2111 passes through the side of the first cylindrical part 211 and is fixedly connected to one side of the cable conduit 5. A second cable routing hole 111 is provided on the side of the second cylindrical part 11. The second cable routing hole 111 passes through the second cylindrical part 11, and the other side of the cable conduit 5 extends into the second cable routing hole 111.

[0101] To enable the fan to operate, the transmission assembly 3 includes: a main shaft 31, a thrust disc 32 for axially limiting the main shaft 31, and an impeller 33 disposed within the extension portion 13. The main shaft 31 includes: a long main shaft 311 and a short main shaft 312. One side of the long main shaft 311 is fixedly connected to the short main shaft 312, and the other side of the long main shaft 311 extends out through the connecting hole 2121 and is fixedly connected to the impeller 33 through the front connecting hole 232. To ensure a more stable axial flow of the fluid entering the impeller and to avoid uneven flow velocity near the hub, a guide cap 6 is fixedly connected to the impeller 33.

[0102] The short main shaft 312 extends out of the rear connecting hole 241 and the thrust connecting hole 2511 respectively. A thrust plate 32 is provided in the extension cavity 01, and the thrust plate 32 is fixedly connected to the short main shaft 312. The thrust plate 32, placed in the extension cavity 01, provides axial restraint to the main shaft 31 when the fan is running, preventing high pressure from being generated on the back surface of the impeller 33, thus applying a leftward axial thrust to the rotor. A motor 02 is located inside the first straight section 211, and the main shaft 31 is located inside the motor 02. A connecting cavity 3111 is provided inside the long main shaft 311. To enhance the magnetism of the rotor and make the output rotation more powerful, a magnet 03 is provided in the connecting cavity 3111, and a shim 04 is provided on the side of the magnet 03 near the long main shaft 311.

[0103] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A fan, characterized in that, include: The main housing (1), heat dissipation assembly (2) and transmission assembly (3) are provided inside the main housing (1). The transmission assembly (3) is connected to the main housing (1) through the heat dissipation assembly (2). The heat dissipation assembly (2) dissipates heat inside the main housing (1) when the transmission assembly (3) is in operation.

2. The fan according to claim 1, characterized in that, The heat dissipation component (2) includes a heat dissipation cylinder (21) and a guide plate (22). A plurality of the guide plates (22) are distributed circumferentially along the heat dissipation cylinder (21), and the heat dissipation cylinder (21) and the guide plate (22) are integrally formed.

3. The fan according to claim 2, characterized in that, The heat dissipation cylinder (21) includes: a first straight cylindrical portion (211) and a first conical portion (212), wherein the first straight cylindrical portion (211) and the first conical portion (212) are integrally formed; A connecting hole (2121) is provided on the end face of the first conical part (212), and a first air inlet (2122) is provided on the end face of the first conical part (212) along the circumferential direction of the connecting hole (2121). The first air inlet (2122) penetrates the end face of the first conical part (212). Multiple guide vanes (22) are circumferentially arranged on the first straight cylindrical portion (211), and the guide vanes (22) extend from the end of the first straight cylindrical portion (211) toward the first tapered portion (212). The outer wall of the first straight cylindrical portion (211) is integrally formed with one side of the guide vanes (22). The other side of the guide plate (22) is fixedly connected to the inner wall of the main housing (1).

4. The fan according to claim 3, characterized in that, The heat dissipation assembly (2) also includes: a front bearing housing (23), a rear bearing housing (24), and a thrust rear cover plate (25). The front bearing seat (23) is fixedly connected to the first tapered part (212), and the two ends of the rear bearing seat (24) are fixedly connected to the first straight cylindrical part (211) and the thrust rear cover plate (25), respectively.

5. The fan according to claim 4, characterized in that, The front bearing seat (23) is fixedly connected to the first tapered part (212), and the side of the front bearing seat (23) is a tapered surface (231). The connection between the tapered surface (231) and the first tapered part (212) is an arc transition. The front bearing housing (23) has a front connecting hole (232) in the middle, and the front connecting hole (232) passes through both ends of the front bearing housing (23); A second air inlet (2321) is provided on the tapered surface (231) along the circumference of the front connecting hole (232), and the second air inlet (2321) passes through the front bearing seat (23) from front to back; The second air inlet (2321) is connected to the first air inlet (2122).

6. The fan according to claim 5, characterized in that, The rear bearing housing (24) has a rear connecting hole (241) in the middle, and the rear connecting hole (241) passes through the rear bearing housing (24). The rear bearing housing (24) has a first air inlet slot (242) on its surface. A first blind slot (243) is provided between the first air inlet slot (242) and the rear connecting hole (241). The first blind slot (243) connects the first air inlet slot (242) and the rear connecting hole (241). The rear bearing housing (24) has a rear limiting hole (244) on its surface. The rear limiting hole (244) is fixedly connected to one end of the limiting post (4), and the other end of the limiting post (4) is fixedly connected to the thrust rear cover plate (25).

7. The fan according to claim 6, characterized in that, The thrust back cover (25) includes: an end face (251) and an extension (252), wherein the end face (251) and the extension (252) are integrally formed, and an extension cavity (01) is formed at the connection between the end face (251) and the extension (252). A thrust connection hole (2511) is provided in the middle of the end face (251), and the thrust connection hole (2511) passes through the end face (251). The end face (251) has a second air inlet slot (253) and a second blind slot (254) is provided between the second air inlet slot (253) and the thrust connection hole (2511) at the end near the rear bearing seat (24). The second blind slot (254) connects the second air inlet slot (253) and the thrust connection hole (2511). The thrust relief cover plate (25) has a thrust limiting hole (255) on its surface, and the thrust limiting hole (255) is fixedly connected to one end of the limiting post (4); The extension (252) is fixedly connected to the rear bearing housing (24).

8. The fan according to claim 7, characterized in that, The main housing (1) includes: a second straight cylindrical part (11), a second conical part (12) and a protruding part (13), wherein the two sides of the second conical part (12) are integrally formed with the second straight cylindrical part (11) and the protruding part (13) respectively; The inner wall of the second straight section (11) is fixedly connected to one side of the guide plate (22); The first straight cylindrical part (211) has a first wiring hole (2111) on its side, the first wiring hole (2111) passes through the side of the first straight cylindrical part (211), and the first wiring hole (2111) is fixedly connected to one side of the wire tube (5). The second straight cylindrical part (11) has a second wiring hole (111) on its side, the second wiring hole (111) passes through the second straight cylindrical part (11), and the other side of the wire tube (5) extends into the second wiring hole (111).

9. The fan according to claim 8, characterized in that, The transmission assembly (3) includes: a main shaft (31), a thrust plate (32), and an impeller (33). The main shaft (31) includes a long main shaft (311) and a short main shaft (312). One side of the long main shaft (311) is fixedly connected to the short main shaft (312). The impeller (33) is provided in the protrusion (13). The other side of the long main shaft (311) extends out of the connecting hole (2121) and is fixedly connected to the front end connecting hole (232) to the impeller (33). The impeller (33) is fixedly connected to the guide cap (6). The short spindle (312) extends out of the rear end connection hole (241) and the thrust connection hole (2511) respectively. The extension cavity (01) is provided with a thrust plate (32), which is fixedly connected to the short spindle (312).

10. The fan according to claim 9, characterized in that, The first cylindrical section (211) is equipped with a motor (02), and the main shaft (31) is located inside the motor (02); The long spindle (311) has a connecting cavity (3111) inside, and a magnet (03) is provided inside the connecting cavity (3111). A gasket (04) is provided on the side of the magnet (03) near the long spindle (311).

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