Fan and radiator

Abstract

The utility model discloses a fan which comprises a motor provided with a shell and a rotating shaft rotationally arranged in the shell in a penetrating mode. The fan blades are mounted on the rotating shaft; the waterproof part is fixedly installed on the rotating shaft and located on the side, close to the shell, of the fan blades, the waterproof part is arranged on the periphery of the rotating shaft in a sleeving mode and connected with the rotating shaft in a sealed mode, and the distance between the peripheral wall of the waterproof part and the rotating shaft is gradually increased in the direction away from the fan blades. In this way, the waterproof part can shield the gap between the rotating shaft and the shell, when the draught fan operates, the waterproof part can rotate along with the rotating shaft, at the moment, liquid falling on the peripheral wall of the waterproof part can be thrown out under the action of centrifugal force, and therefore external liquid can be effectively prevented from flowing into the motor in the axial direction of the rotating shaft; the risk that the normal operation of the fan is affected due to the fact that external liquid flows into the motor is greatly reduced, and the operation reliability of the fan is greatly improved. In addition, the utility model further discloses a radiator with the fan.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a fan and radiator. BACKGROUND

[0002] At present, the radiator for cooling the transformer in nuclear power plant usually comprises a radiator body and a fan, the radiator body has a plurality of radiating fins, the fan is installed at the bottom of the radiator body, the rotating shaft of the motor is arranged upward, and the fan blade is installed on the rotating shaft. When the fan is used to cool the radiator body, the cold air can be blown from the bottom to the top of the radiator body, and the heat of the radiator body can be taken away when the cold air flows quickly through the radiating fins of the radiator body, so that the cooling efficiency is high.

[0003] However, since the rotating shaft of the motor is arranged upward, in order to facilitate the rotation of the rotating shaft, the rotating shaft is arranged through the shell of the motor and needs to have a gap between the shell, in the long-term use process, rainwater can flow downward to the inside of the motor along the rotating shaft, which can cause the motor bearing to be damp, the fan to emit abnormal sound, and the motor to be burned out, thereby seriously affecting the normal use of the fan. SUMMARY

[0004] The utility model discloses at least one of the technical problems in the prior art. To this end, the utility model provides a fan, which can effectively prevent external liquid from flowing into the motor along the axial direction of the rotating shaft and improve the operation reliability of the fan.

[0005] The utility model further provides a radiator with the above-mentioned fan.

[0006] The fan according to the first aspect of the utility model comprises: a motor having a shell and a rotating shaft rotatably arranged through the shell; a fan blade installed on the rotating shaft; and a waterproof member fixedly installed on the rotating shaft and located on the side of the fan blade close to the shell, the waterproof member being sleeved on the outer periphery of the rotating shaft and being in sealed connection with the rotating shaft, and the distance between the outer peripheral wall of the waterproof member and the rotating shaft gradually increases in the direction away from the fan blade.

[0007] The fan according to the utility model has at least the following beneficial effects:

[0008] The fan of the utility model discloses a waterproof piece is fixedly installed on the rotating shaft, the waterproof piece is located at one end of the fan blade close to the shell and is sealedly connected with the rotating shaft, and the distance between the outer peripheral wall of the waterproof piece and the rotating shaft gradually increases along the direction away from the fan blade, so that the waterproof piece can block the liquid flowing along the axial direction of the rotating shaft, thereby preventing the external liquid from flowing into the motor along the axial direction of the rotating shaft.

[0009] According to some embodiments of the utility model, the waterproof piece and the shell have a gap therebetween.

[0010] According to some embodiments of the utility model, in the axial direction of the rotating shaft, the projection of the shell coincides with the projection of the waterproof piece, or the projection of the shell is located within the projection of the waterproof piece.

[0011] According to some embodiments of the utility model, the waterproof piece is provided with a waterproof cavity on the side wall away from the fan blade, the shell is at least partially located within the waterproof cavity, and the shell has a gap between the outer peripheral wall and the inner peripheral wall of the waterproof cavity.

[0012] According to some embodiments of the utility model, the outer peripheral wall of the waterproof piece is a hemispherical surface with a radius gradually increasing along the direction away from the fan blade.

[0013] According to some embodiments of the utility model, the fan comprises a limiting structure for limiting the movement of the waterproof piece close to the shell, the limiting structure comprises a first limiting part arranged on the rotating shaft and a second limiting part arranged on the waterproof piece, and the first limiting part and the second limiting part abut or are clamped with each other.

[0014] According to some embodiments of the utility model, the first limiting part is a protruding part arranged on the outer peripheral wall of the rotating shaft, the second limiting part is a part of the waterproof piece located on the side away from the shell and abutting the protruding part, and the fan blade abuts the waterproof piece and is pressed against the waterproof piece in cooperation with the protruding part.

[0015] According to some embodiments of the utility model, the motor further comprises a bearing arranged on the outer periphery of the rotating shaft, and the bearing is a ceramic bearing.

[0016] According to some embodiments of the present application, the ceramic bearing comprises an inner ring, an outer ring, a rolling element, a retainer and a double-sided dust cover, the outer ring is sleeved on the outer periphery of the inner ring, the inner ring and the outer ring have a mounting space therebetween, the retainer is mounted in the mounting space, the rolling element is mounted on the retainer, and the double-sided dust cover is arranged on the opposite sides of the outer ring and seals the mounting space; the inner ring is a high-temperature sintered zirconia part, and / or the outer ring is a high-temperature sintered zirconia part, and / or the rolling element is a silicon nitride part, and / or the retainer is a polyether ether ketone part, and / or the double-sided dust cover is a polyether ether ketone part.

[0017] According to the heat dissipation device of the second aspect of the present application, the heat dissipation device comprises a heat dissipation device body and the fan of any one of the above embodiments, the fan is arranged below the heat dissipation device body, and the rotating shaft is arranged upward.

[0018] According to the heat dissipation device of the present application, at least the following beneficial effects are achieved:

[0019] By arranging the fan of any one of the above embodiments, the waterproof part is fixedly installed on the rotating shaft, the waterproof part can effectively prevent external liquid from flowing into the motor along the axial direction of the rotating shaft, greatly reduces the risk of affecting the normal operation of the fan due to the inflow of external liquid into the motor, and greatly improves the operation reliability of the heat dissipation device.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in combination with the drawings and embodiments, in which:

[0022] Figure 1 It is a schematic view of the fan of the embodiment of the present application;

[0023] Figure 2 It is another schematic view of the fan of the embodiment of the present application;

[0024] Figure 3 It is a sectional view of the fan of the embodiment of the present application;

[0025] Figure 4 It is another sectional view of the fan of the embodiment of the present application;

[0026] Figure 5 It is a partial sectional view of the fan of the embodiment of the present application;

[0027] Figure 6It is another schematic view of the rain cover of the embodiment of the utility model;

[0028] Figure 7 It is another schematic view of the rain cover of the embodiment of the utility model;

[0029] Figure 8 It is another schematic view of the fan of the embodiment of the utility model.

[0030] Reference signs:

[0031] Motor 100, rotating shaft 110, protruding part 111, shell 120, fan blade 200, waterproof part 300, mounting hole 310, water throwing part 320, waterproof cavity 330, air duct 400, mounting frame 410, protective net 420. DETAILED DESCRIPTION

[0032] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0033] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship of up, down, front, back, left, right and the like indicated by the drawings is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as limiting the utility model.

[0034] In the description of the utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0035] In the description of the utility model, unless otherwise explicitly limited, the words of setting, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0036] In the description of the present utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] With reference to Figures 1 to 8 The present utility model provides a fan, the fan includes motor 100, fan blade 200 and waterproof piece 300. Motor 100 has casing 120 and rotation axle 110 that rotates and is arranged in casing 120, fan blade 200 is installed on rotation axle 110, waterproof piece 300 is fixedly installed on rotation axle 110 and is located on the side of fan blade 200 close to casing 120, waterproof piece 300 is sleeved on the outer periphery of rotation axle 110 and is sealedly connected with rotation axle 110, and along the direction away from fan blade 200, the spacing between the outer peripheral wall of waterproof piece 300 and rotation axle 110 gradually increases.

[0038] By adopting the fan of the present utility model embodiment, waterproof piece 300 is fixedly installed on rotation axle 110, waterproof piece 300 is located on the end of fan blade 200 close to casing 120 and is sealedly connected with rotation axle 110, and along the direction away from fan blade 200, the spacing between the outer peripheral wall of waterproof piece 300 and rotation axle 110 gradually increases, so that waterproof piece 300 can block the liquid flowing along the axial direction of rotation axle 110, thereby preventing the external liquid from flowing into the inside of motor 100 from the gap between rotation axle 110 and casing 120 along the axial direction of rotation axle 110. When the fan is running, waterproof piece 300 can rotate with rotation axle 110, at this time, the liquid falling on the outer peripheral wall of waterproof piece 300 can be thrown out under the action of centrifugal force, thereby reducing the accumulation of external liquid on waterproof piece 300, further avoiding the occurrence of the situation that the external liquid flows into the inside of motor 100 along the axial direction of rotation axle 110, greatly reducing the risk of affecting the normal operation of the fan due to the inflow of external liquid into the inside of motor 100, and greatly improving the operation reliability of the fan.

[0039] It can be understood that the distance between the outer peripheral wall of the waterproof piece 300 and the rotating shaft 110 gradually increases in the direction away from the fan blade 200, specifically, the outer peripheral wall of the waterproof piece 300 is arranged in the axial direction of the rotating shaft 110 in the direction away from the fan blade 200, and extends in the radial direction of the rotating shaft 110 towards the direction away from the rotating shaft 110. By adopting the above structure, the waterproof piece 300 can also guide the external liquid to flow outward in the direction away from the fan blade 200. When the fan is running, the liquid on the waterproof piece 300 can be thrown outward in the direction away from the fan blade 200 under the action of centrifugal force, thereby reducing the influence of the liquid thrown off on the rotation of the fan blade 200, thereby further ensuring the operation reliability of the fan.

[0040] It can be understood that, with reference to Figures 1 to 8 In some embodiments, the waterproof piece 300 is provided with a mounting hole 310, the rotating shaft 110 is arranged in the mounting hole 310, and the outer peripheral wall of the rotating shaft 110 is in interference fit with the inner peripheral wall of the mounting hole 310, so that the waterproof piece 300 can be fixedly installed on the rotating shaft 110 and sealedly connected with the rotating shaft 110. Of course, in addition thereto, in order to realize the sealed connection between the waterproof piece 300 and the rotating shaft 110, the inner peripheral wall of the waterproof piece 300 and the outer peripheral wall of the rotating shaft 110 can also be directly welded, and a sealing ring or other sealing structure can also be directly installed between the waterproof piece 300 and the rotating shaft 110, which is not limited in the utility model.

[0041] With reference to Figures 1 to 7 In some embodiments, the waterproof piece 300 has a gap with the housing 120.

[0042] By adopting the above structure, the waterproof piece 300 has a gap with the housing 120, which can avoid the collision and friction between the waterproof piece 300 and the housing 120 when the waterproof piece 300 rotates with the rotating shaft 110. Not only can the noise generated by the collision and friction between the waterproof piece 300 and the housing 120 be avoided, but also the damage caused by the collision and friction between the waterproof piece 300 and the housing 120 can be avoided, which is beneficial to improve the service life of the motor 100.

[0043] It can be understood that the distance between the waterproof piece 300 and the housing 120 can be specifically set to 3mm, so that the external liquid can be effectively shielded without the distance between the waterproof piece 300 and the housing 120 being too large, and the friction between the waterproof piece 300 and the housing 120 due to the shaking of the waterproof piece 300 during rotation can also be avoided without the distance between the waterproof piece 300 and the housing 120 being too small.

[0044] With reference to Figures 1 to 7In some embodiments, a projection of the housing 120 in the axial direction of the rotating shaft 110 is located within a projection of the waterproof member 300.

[0045] By adopting the above structure, liquid flowing along the axial direction of the rotating shaft 110 to the waterproof member 300 can flow along the outer circumferential wall of the waterproof member 300 to the outside of the housing 120, thereby further improving the shielding effect of the waterproof member 300 on the gap between the rotating shaft 110 and the housing 120, and the centrifugal force generated when the fan is running can directly throw the liquid on the surface of the waterproof member 300 to the outside of the housing 120, thereby further protecting the motor 100 and further reducing the risk of liquid flowing into the housing 120 along the axial direction of the rotating shaft 110.

[0046] In some embodiments, a projection of the housing 120 in the axial direction of the rotating shaft 110 coincides with a projection of the waterproof member 300. By adopting the above structure, liquid flowing along the axial direction of the rotating shaft 110 can be blocked, and the liquid on the surface of the waterproof member 300 can be thrown to the outside of the housing 120 when the fan is running.

[0047] Referring to Figures 1 to 7 In some embodiments, a waterproof cavity 330 is formed on the side wall of the waterproof member 300 away from the fan blade 200, and the housing 120 is at least partially located in the waterproof cavity 330, and a gap is formed between the outer circumferential wall of the housing 120 and the inner circumferential wall of the waterproof cavity 330.

[0048] In the above structure, by forming the waterproof cavity 330 on the side wall of the waterproof member 300 away from the fan blade 200, the mass of the waterproof member 300 can be greatly reduced, which is not only conducive to improving the stability of the motor 100 in operation, but also conducive to reducing the consumption of the waterproof member 300 and reducing the production cost of the waterproof member 300. In addition, by locating the housing 120 at least partially in the waterproof cavity 330 and forming a gap between the outer circumferential wall of the housing 120 and the inner circumferential wall of the waterproof cavity 330, the outer circumferential wall of the waterproof member 300 is extended outward along the direction away from the fan blade 200 to the outer circumferential wall of the housing 120, at this time, the waterproof member 300 is arranged on the outer circumferential wall of the housing 120, and the gap between the rotating shaft 110 and the housing 120 is limited in the waterproof cavity 330, thereby not only further reducing the risk of liquid flowing into the motor 100 along the axial direction of the rotating shaft 110, but also preventing liquid flowing along the radial direction of the rotating shaft 110 from directly flowing to the gap between the rotating shaft 110 and the housing 120, i.e. further reducing the risk of liquid flowing into the motor 100 along the radial direction of the rotating shaft 110, thereby further reducing the impact of liquid flowing into the motor 100 on the normal operation of the fan, and greatly improving the operation reliability of the fan.

[0049] It can be understood that the shell 120 is at least partially located in the waterproof cavity 330, and the spacing between the outer peripheral wall of the shell 120 and the inner peripheral wall of the waterproof cavity 330 can be specifically set to 3 mm, so that the external liquid can be effectively shielded without excessive spacing, and friction between the waterproof member 300 and the shell 120 during rotation can be avoided due to insufficient spacing.

[0050] It can be understood that in some embodiments, the waterproof member 300 can also be directly arranged on the side of the shell 120 close to the fan blade 200, and in order to avoid contact and friction between the waterproof member 300 and the shell 120, the waterproof member 300 and the shell 120 are arranged in the axial direction of the rotating shaft 110. Similarly, the side wall of the waterproof member 300 away from the fan blade 200 is provided with a waterproof cavity 330, which is only an exemplary description of the present application. In some embodiments, the waterproof member 300 can also be directly used in a solid structure, and in this case, the waterproof member 300 is located on the side of the shell 120 close to the fan blade 200, and in order to avoid contact and friction between the waterproof member 300 and the shell 120, the waterproof member 300 and the shell 120 are also arranged in the axial direction of the rotating shaft 110.

[0051] Referring to Figures 1 to 7 In some embodiments, the outer peripheral wall of the waterproof member 300 is also provided with a water throwing portion 320, which is located at one end of the waterproof member 300 away from the fan blade 200 and is arranged outwardly bent relative to the outer peripheral wall.

[0052] In the above structure, the water throwing portion 320 can better throw the water on the outer peripheral wall of the waterproof member 300 outward when the fan is running, further reducing the risk of external liquid flowing along the radial direction of the rotating shaft 110 to the inside of the motor 100, thereby further reducing the influence of the external liquid flowing into the inside of the motor 100 on the normal operation of the fan, and greatly improving the operation reliability of the fan.

[0053] Referring to Figures 1 to 7 In some embodiments, the outer peripheral wall of the waterproof member 300 is a semispherical surface with a radius gradually increasing in the direction away from the fan blade 200.

[0054] In the above structure, by setting the outer peripheral wall of the waterproof piece 300 as a hemispherical surface with a gradually increasing radius along the direction away from the fan blade 200, thus enabling the external liquid to flow more smoothly outward along the direction away from the fan blade 200 when falling on the outer peripheral wall of the waterproof piece 300, and when the fan is running, the liquid on the waterproof piece 300 can be thrown outward along the direction away from the fan blade 200 by centrifugal force, thus avoiding the liquid being directly thrown toward the fan blade 200 by centrifugal force, not only reducing the impact of the liquid being thrown on the waterproof piece 300 on the rotation of the fan blade 200, further ensuring the operation reliability of the fan, but also avoiding the liquid being thrown to the fan blade 200 and then flowing along the fan blade 200 to the rotating shaft 110 and flowing along the rotating shaft 110 back to the waterproof piece 300, further avoiding the occurrence of the situation that the external liquid flows into the motor 100 along the axial direction of the rotating shaft 110.

[0055] It can be understood that the outer peripheral wall of the waterproof piece 300 is a hemispherical surface with a gradually increasing radius along the direction away from the fan blade 200, which is only an example of Figures 1 to 7 In order to realize the outward extension of the outer peripheral wall of the waterproof piece 300 along the direction away from the fan blade 200, in addition to setting the outer peripheral wall of the waterproof piece 300 as a hemispherical surface, the outer peripheral wall of the waterproof piece 300 can also be set as a conical surface with a gradually increasing diameter along the direction away from the fan blade 200, or the outer peripheral wall of the waterproof piece 300 can also be set as other revolution curved surfaces with a gradually increasing diameter along the direction away from the fan blade 200, which are not limited by the present application.

[0056] Referring to Figures 1 to 7 In some embodiments, the fan further comprises a limiting structure for limiting the movement of the waterproof piece 300 close to the housing 120, the limiting structure comprising a first limiting portion provided on the rotating shaft 110 and a second limiting portion provided on the waterproof piece 300, the first limiting portion and the second limiting portion abutting or clamping each other.

[0057] In the above structure, by setting the first limiting portion on the rotating shaft 110 and the second limiting portion on the waterproof piece 300, and abutting or clamping the first limiting portion and the second limiting portion with each other, the waterproof piece 300 can be limited, when the waterproof piece 300 tends to move toward the housing 120 due to gravity or shaking and shaking during rotation, the limiting structure can effectively block the waterproof piece 300, avoid the waterproof piece 300 moving to contact the housing 120 to cause friction and noise or friction damage, and further facilitate the normal operation of the fan.

[0058] Referring to Figures 1 to 7In some embodiments, the first limiting part is a protruding part 111 arranged on the outer circumferential wall of the rotating shaft 110, and the second limiting part is a portion of the waterproof member 300 located on the side of the protruding part 111 away from the shell 120 and abutting against the protruding part 111.

[0059] In the above structure, by arranging the second limiting part on the waterproof member 300 on the side of the protruding part 111 away from the shell 120 and abutting against the protruding part 111, the waterproof member 300 can be abuttingly limited, and the movement of the waterproof member 300 towards the shell 120 can be effectively limited. In addition, by arranging the first limiting part as the protruding part 111 on the outer circumferential wall of the rotating shaft 110, not only can the waterproof member 300 be abuttingly limited, but also the structure is simple and convenient for processing and production.

[0060] It can be understood that, referring to Figures 1 to 8 , the first limiting part is a protruding part 111 arranged on the outer circumferential wall of the rotating shaft 110, specifically, the protruding part 111 can be arranged around the outer circumferential wall of the rotating shaft 110, and the protruding part 111 can be integrally formed with the rotating shaft 110, thereby making the production and processing of the first limiting part more simple and convenient. It can be understood that, in addition to being arranged around the outer circumferential wall of the rotating shaft 110, the protruding part 111 can also be arranged on the outer circumferential wall of the rotating shaft 110 on one side of the rotating shaft 110, or the first limiting part can also be arranged as a plurality of protruding parts 111, and the plurality of protruding parts 111 can be arranged at intervals along the circumferential direction of the rotating shaft 110. The specific structure of the first limiting part is not limited in the utility model.

[0061] It can be understood that the second limiting part is a portion of the waterproof member 300 located on the side of the protruding part 111 away from the shell 120 and abutting against the protruding part 111, specifically, the second limiting part can be a side wall of the waterproof member 300, or the second limiting part can also be an abutting part arranged on the waterproof member 300 and capable of abutting against the protruding part 111. The utility model does not make a specific limitation on this.

[0062] It can be understood that, in addition to being abuttingly connected, the first limiting part and the second limiting part can also be clampedly connected, specifically, a clamping groove can be arranged on one of the first limiting part and the second limiting part, and the other can be provided with a clamping block or a clamping hook capable of being clamped into the clamping groove.

[0063] Referring to Figures 1 to 5 In some embodiments, the fan blade 200 abuts against the waterproof member 300 and squeezes the waterproof member 300 in cooperation with the protruding part 111.

[0064] In the above structure, the fan blade 200 is installed on the rotating shaft 110, and the waterproof member 300 is pressed by the fan blade 200 abutting against the waterproof member 300, so that the waterproof member 300 is pressed by the rotating shaft 111, and the waterproof member 300 is more stable and firm, and the structure of the fan is more compact, and the operation stability of the fan is improved.

[0065] With reference to Figure 8 In some embodiments, the fan further comprises a wind tube 400, an inner wall of the wind tube 400 is provided with a mounting frame 410, and the motor 100 is installed on the mounting frame 410 and located in the interior of the wind tube 400, so that the installation stability of the motor 100 is improved. The wind tube 400 is further provided with protective nets 420 at both ends, and the motor 100 and the fan blade 200 are located between the two protective nets 420, so that the motor 100 and the fan blade 200 are protected, the influence of the external environment on the motor 100 and the fan blade 200 during operation of the fan is reduced, and the stability of the fan operation is improved.

[0066] In some embodiments, the waterproof member 300 is a stainless steel member.

[0067] In the above structure, the waterproof member 300 is a stainless steel member, which is easy to obtain and can reduce the production cost of the waterproof member 300. In addition, the stainless steel member has good corrosion resistance, can adapt to different use environments, and is not easy to deform during long-term use, so as to further maintain the stability of the fan operation.

[0068] It can be understood that the waterproof member 300 is a stainless steel member, which is only an exemplary description of the utility model, and the waterproof member 300 can also be a plastic member or a member made of other materials, which is not limited in the utility model.

[0069] In some embodiments, the motor 100 further comprises a bearing installed on the outer periphery of the rotating shaft 110, and the bearing is a ceramic bearing.

[0070] In the above structure, the bearing in the motor 100 is a ceramic bearing, which is light in weight and low in noise during operation of the motor 100. In addition, the ceramic bearing has good corrosion resistance, high temperature resistance, low temperature resistance and wear resistance, and is not easy to be damp, so as to adapt to high humidity and high salt environment, thereby effectively solving the problem of abnormal noise or failure of the motor 100 caused by corrosion of the bearing due to damp, improving the stability of the motor 100 operation, and further improving the stability of the fan operation.

[0071] In some embodiments, the ceramic bearing comprises an inner ring, an outer ring, a rolling body, a retainer and a double-sided dust cover, the outer ring is sleeved on the outer periphery of the inner ring, the inner ring and the outer ring have a mounting space therebetween, the retainer is mounted in the mounting space, the rolling body is mounted on the retainer, and the double-sided dust cover covers the opposite two sides of the outer ring and seals the mounting space; wherein the inner ring can be made of high-temperature sintered zirconia, the outer ring can also be made of high-temperature sintered zirconia, the rolling body can be made of silicon nitride, the retainer can be made of polyether ether ketone, and the double-sided dust cover can also be made of polyether ether ketone, thereby facilitating the improvement of corrosion resistance of the bearing, the prolongation of the service life of the ceramic bearing, and the further improvement of the stability of the fan operation.

[0072] It can be understood that the inner ring can be made of high-temperature sintered zirconia, silicon nitride, silicon carbide or other ceramic materials. The outer ring can be made of high-temperature sintered zirconia, silicon nitride, silicon carbide or other ceramic materials. The rolling body can be made of silicon nitride, zirconia, silicon carbide or other ceramic materials. The retainer can be made of stainless steel, polytetrafluoroethylene or other materials. The double-sided dust cover can be made of stainless steel or other materials, which is not limited in the utility model, and can be selected according to actual conditions.

[0073] The utility model also proposes a radiator, the radiator includes radiator body and the fan of any one embodiment above, wherein, the fan is arranged below the radiator body, and the rotating shaft 110 is arranged upwards.

[0074] In the above structure, the fan is arranged below the radiator body, and the rotating shaft 110 is arranged upwards, so that the fan can blow cold air from the bottom to the top of the radiator body, which facilitates the improvement of the heat dissipation efficiency. In addition, the fan of any one embodiment above is provided with a waterproof piece 300 fixedly installed on the rotating shaft 110, which can effectively prevent external liquid from flowing into the motor 100 along the axial direction of the rotating shaft 110, greatly reducing the risk of affecting the normal operation of the fan due to the inflow of external liquid into the motor 100, and greatly improving the operation reliability of the radiator.

[0075] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the utility model. In addition, the embodiments and the features in the embodiments of the utility model can be combined with each other without conflict.

Claims

1. A fan characterised in that, The fan comprises: a motor (100) having a housing (120) and a rotating shaft (110) rotatingly arranged in the housing (120); a fan blade (200) mounted on the rotating shaft (110); a waterproof member (300) fixedly mounted on the rotating shaft (110) and located on a side of the fan blade (200) close to the housing (120), the waterproof member (300) being sleeved on an outer periphery of the rotating shaft (110) and being sealingly connected with the rotating shaft (110), and an interval between an outer peripheral wall of the waterproof member (300) and the rotating shaft (110) gradually increases in a direction away from the fan blade (200).

2. The fan of claim 1, wherein An interval is provided between the waterproof member (300) and the housing (120).

3. The fan of claim 2, wherein, A projection of the housing (120) overlaps a projection of the waterproof member (300) in an axial direction of the rotating shaft (110), or the projection of the housing (120) is located in the projection of the waterproof member (300).

4. The fan of claim 3, wherein, An outer peripheral wall of the waterproof member (300) is provided with a waterproof cavity (330) on a side away from the fan blade (200), the housing (120) is at least partially located in the waterproof cavity (330), and an interval is provided between an outer peripheral wall of the housing (120) and an inner peripheral wall of the waterproof cavity (330).

5. The fan of claim 1, wherein The outer peripheral wall of the waterproof member (300) is a semispherical surface with a radius gradually increasing in the direction away from the fan blade (200).

6. The fan of any one of claims 1 to 5, wherein, The fan comprises a limiting structure for limiting movement of the waterproof member (300) close to the housing (120), the limiting structure comprising a first limiting portion arranged on the rotating shaft (110) and a second limiting portion arranged on the waterproof member (300), the first limiting portion and the second limiting portion abutting or clamping each other.

7. The fan of claim 6, wherein, The first limiting portion is a protruding portion (111) arranged on an outer peripheral wall of the rotating shaft (110), and the second limiting portion is a portion of the waterproof member (300) located on a side of the protruding portion (111) away from the housing (120) and abutting the protruding portion (111). The fan blade (200) abuts the waterproof member (300) and clamps the waterproof member (300) in cooperation with the protruding portion (111).

8. The fan of any one of claims 1 to 5, wherein, The motor (100) further comprises a bearing mounted on an outer periphery of the rotating shaft (110), and the bearing is a ceramic bearing.

9. The fan of claim 8, wherein, The ceramic bearing comprises an inner race, an outer race, a rolling element, a retainer and a double-sided dust cover, the outer race is sleeved on an outer periphery of the inner race, an installation space is provided between the inner race and the outer race, the retainer is mounted in the installation space, the rolling element is mounted on the retainer, and the double-sided dust cover is arranged on opposite sides of the outer race and seals the installation space. The inner race is made of high-temperature sintered zirconia, and / or The outer race is made of high-temperature sintered zirconia, and / or The rolling element is made of silicon nitride, and / or The retainer is made of polyether ether ketone, and / or The double-sided dust cover is made of polyether ether ketone.

10. A heat sink, characterized by The heat sink body and the fan of any one of claims 1 to 9 are arranged below the heat sink body, and the rotating shaft (110) is arranged upward.

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