Hub, impeller, fan and vehicle

Abstract

The invention discloses a hub, an impeller, a fan and a vehicle. The hub comprises a mounting part. The two sides of the mounting part in the axial direction of the mounting part are an air inlet side and an air outlet side respectively; a pollution discharge surface is formed on the mounting part, and is obliquely arranged in the direction from the air inlet side to the air outlet side. Therefore, the pollution discharge surface is arranged on the mounting part, so that sand and dust on the air inlet side and the air outlet side can flow away along the pollution discharge surface, deposition of the sand and dust in the mounting part is avoided, and the situation of clamping stagnation or abnormal sound caused by uneven stress of the hub due to deposition of the sand and dust on the hub is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a hub, an impeller, a fan and a vehicle. Background Art

[0002] At present, when a vehicle is driving in a desert or in an area with strong wind and sand, the strong wind and sand will flow into the fan of the vehicle's cooling system with the air flow, affecting the normal operation of the fan and even causing damage to the fan. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, a first object of the present invention is to provide a wheel hub that can enhance the sand discharge effect.

[0004] The second object of the present invention is to provide another wheel hub to improve the sand removal effect of the wheel hub.

[0005] The third object of the present invention is to provide an impeller comprising the hub described above.

[0006] A fourth objective of the present invention is to provide a fan comprising the impeller described above.

[0007] A fifth object of the present invention is to provide a vehicle, comprising the fan described in the above embodiment.

[0008] The wheel hub according to the embodiment of the first aspect of the present invention includes: a mounting portion, wherein the mounting portion has an air inlet side and an air outlet side on both sides along the axial direction of the mounting portion respectively; a sewage discharge surface is formed on the mounting portion, and the sewage discharge surface is inclined in a direction away from the central axis of the mounting portion along the direction from the air inlet side to the air outlet side.

[0009] According to the wheel hub of the embodiment of the present invention, a drainage surface is provided on the mounting portion so that the sand and dust on the air inlet side and the air outlet side can flow away along the drainage surface, thereby avoiding the accumulation of sand and dust in the mounting portion and reducing the accumulation of sand and dust on the wheel hub, causing uneven force on the wheel hub, resulting in jamming or abnormal noise.

[0010] In some embodiments, the dirt discharge surface faces the air outlet side, and along the direction from the air inlet side to the air outlet side, the dirt discharge surface is inclined in a direction away from the central axis of the mounting portion.

[0011] In some embodiments, the dirt discharge surface faces the air inlet side, and along the direction from the air inlet side to the air outlet side, the dirt discharge surface is inclined toward a direction close to the central axis of the mounting portion.

[0012] In some embodiments, the drainage surface extends along the circumference of the mounting portion.

[0013] In some embodiments, at least one sand discharge hole is formed on the mounting portion, the sand discharge hole passes through the mounting portion, and the sand discharge hole intersects with the sewage discharge surface.

[0014] In some embodiments, a central axis of the sand discharge hole is parallel to a central axis of the mounting portion.

[0015] In some embodiments, the wheel hub further includes: a sand retaining structure, the sand retaining structure being disposed on the wind outlet side of the mounting portion, and the sand retaining structure being inclined relative to the central axis of the mounting portion along at least one side surface of the mounting portion in the circumferential direction.

[0016] In some embodiments, the two side surfaces of the sand retaining structure along the circumference of the mounting portion are respectively a first surface and a second surface, and the first surface is arranged upstream of the second surface along the rotation direction of the hub; the first surface is parallel to the central axis of the mounting portion, and the second surface is inclined relative to the central axis of the mounting portion.

[0017] In some embodiments, there are multiple sand retaining structures, which are arranged at intervals along the circumference of the mounting portion; an angle α is formed between two adjacent wall surfaces of two adjacent sand retaining structures, and α satisfies: 20°≤α≤30°.

[0018] In some embodiments, at least one weight-reducing groove is formed on the mounting portion, the weight-reducing groove is located on the air inlet side, and the sand discharge hole is formed on the bottom wall of the weight-reducing groove.

[0019] In some embodiments, the sand discharge hole is located upstream of the weight reduction groove along the rotation direction of the impeller.

[0020] In some embodiments, along the direction from the air inlet side toward the air outlet side, the bottom wall of the weight reducing groove extends obliquely in a direction away from the central axis of the mounting portion, and the sand discharge hole is formed on a side of the bottom wall of the weight reducing groove away from the central axis of the mounting portion.

[0021] In some embodiments, at least one through hole is formed on the mounting portion, and the through hole extends obliquely in a direction from the air inlet side toward the air outlet side and in a direction away from the central axis of the mounting portion.

[0022] In some embodiments, a plurality of sand-draining holes are formed on the mounting portion, and the plurality of sand-draining holes are arranged at intervals along the circumference of the mounting portion.

[0023] In some embodiments, a plurality of through holes are formed on the mounting portion, and the plurality of through holes are arranged at intervals along the circumference of the mounting portion.

[0024] In some embodiments, the mounting portion is formed with a plurality of sand discharge holes, a plurality of through holes and at least one sewage discharge surface, the plurality of sand discharge holes are located radially outside the plurality of through holes along the mounting portion, and the sewage discharge surface is located radially outside the plurality of through holes along the mounting portion.

[0025] In some embodiments, the plurality of sand drainage holes and the plurality of through holes are respectively opposite to each other.

[0026] In some embodiments, the mounting portion includes: a mounting plate and a peripheral wall, wherein the two axial sides of the mounting plate are respectively an air inlet side and an air outlet side; the peripheral wall includes a first sub-wall and a second sub-wall, one end of the first sub-wall is connected to the mounting plate, and extends obliquely along the direction from the air inlet side to the air outlet side and the other end of the first sub-wall toward a direction away from the central axis of the mounting plate, a side surface of the first sub-wall adjacent to the central axis of the mounting plate is the sewage discharge surface, one end of the second sub-wall is connected to the other end of the first sub-wall, and the other end of the second sub-wall extends toward the direction of the air inlet side.

[0027] The wheel hub according to the embodiment of the second aspect of the present invention comprises: a mounting portion, wherein at least one sand discharge hole is formed on the mounting portion, and the sand discharge hole passes through the mounting portion.

[0028] In some embodiments, a central axis of the sand discharge hole is parallel to a central axis of the mounting portion.

[0029] In some embodiments, there are a plurality of sand removal holes, and the plurality of sand removal holes are arranged at intervals along the circumference of the mounting portion.

[0030] In some embodiments, the sand removal holes are disposed on the outer periphery of the mounting portion.

[0031] The impeller according to an embodiment of the third aspect of the present invention comprises the hub described in any one of the above embodiments.

[0032] The fan according to the fourth aspect of the present invention comprises: a wind shield and an impeller, wherein the wind shield is formed with an opening, and the impeller is the impeller described in any one of the above embodiments, and the impeller is arranged at the opening.

[0033] In some embodiments, a wind protection ring is provided at the opening, a sand discharge port is formed at the bottom of the wind protection ring, and the sand discharge port is opposite to the impeller.

[0034] In some embodiments, the fan further includes: a sand discharge valve, which is arranged at the sand discharge port, and the sand discharge port is opened when the force exerted by the fluid at the sand discharge port on the sand discharge valve reaches the opening force of the sand discharge valve, and the sand discharge port is closed when the force exerted by the fluid at the sand discharge port on the sand discharge valve does not reach the opening force of the sand discharge valve.

[0035] In some embodiments, the sand discharge valve includes: a sand discharge baffle and at least one elastic reset member. The sand discharge baffle is openably and closably arranged at the sand discharge port. The sand discharge baffle is rotatably connected to the wind protection ring. The elastic reset member is configured to keep the sand discharge baffle closed at all times.

[0036] In some embodiments, it further includes: at least one rotating shaft, the rotating shaft is rotatably disposed on the wind shield, the sand discharge baffle is connected to the rotating shaft, and the elastic reset member is sleeved on the rotating shaft to drive the sand discharge baffle to open and close the sand discharge port.

[0037] In some embodiments, the fan further comprises: a motor, the motor is disposed at the mounting portion, the motor comprises a rotor, and the mounting portion is connected to the rotor.

[0038] A vehicle according to a fifth aspect of the present invention comprises the fan described in any one of the above embodiments.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 is a schematic diagram of the air inlet side of a fan according to an embodiment of the present invention;

[0042] Figure 2 is a schematic diagram of the air outlet side of a fan according to an embodiment of the present invention;

[0043] Figure 3 is an axial schematic diagram of a fan according to an embodiment of the present invention;

[0044] Figure 4 is a schematic diagram of the air outlet side of an impeller according to an embodiment of the present invention;

[0045] Figure 5 yes Figure 4 Enlarged schematic diagram of the middle P region;

[0046] Figure 6is a schematic diagram of the air inlet side of an impeller according to an embodiment of the present invention;

[0047] Figure 7 yes Figure 6 Enlarged schematic diagram of the middle Q region;

[0048] Figure 8 is a cross-sectional schematic diagram of a fan according to an embodiment of the present invention;

[0049] Fig. 9 yes Figure 8 Enlarged schematic diagram of the middle N region;

[0050] Fig.10 yes Figure 8 Enlarged schematic diagram of the middle R region;

[0051] Fig.11 yes Figure 8 Schematic diagram of the enlarged M region.

[0052] Reference numerals:

[0053] 100. Fan;

[0054] 10. impeller; 11. mounting portion; 111. through hole; 112. sand discharge hole; 113. sewage discharge surface; 114. mounting plate; 115. peripheral wall; 1151. first sub-wall; 1152. second sub-wall; 12. blade; 13. weight reduction groove;

[0055] 20. sand retaining structure; 21. first surface; 22. second surface;

[0056] 30. Wind shield; 31. Opening; 32. Wind shield; 321. Sand discharge port;

[0057] 40. Sand discharge valve; 41. Sand discharge baffle; 42. Rotating shaft;

[0058] 50. Motor;

[0059] a. Air inlet side; b. Air outlet side. DETAILED DESCRIPTION

[0060] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 1 - Fig.11 The impeller 10 according to the embodiment of the present invention is described. The impeller 10 includes: a mounting portion 11 .

[0061] Specifically, if Figure 1-Figure 5 As shown, the two axial sides of the mounting portion 11 are respectively the air inlet side a and the air outlet side b, and a sewage discharge surface 113 is formed on the mounting portion 11. The sewage discharge surface 113 is inclined in the direction from the air inlet side a to the air outlet side b and faces away from the central axis of the mounting portion 11.

[0062] In this embodiment, the fan 100 is used as part of the cooling system of the vehicle to introduce external air into the front cabin of the vehicle, thereby reducing the temperature of the engine and / or the drive motor and ensuring the normal operation of the engine and the drive motor. At the same time, part of the air entering the fan 100 flows back to form heat dissipation for the motor 50 included in the fan 100. For example, when the vehicle is traveling in a desert area, the vehicle is affected by wind and sand, and the wind and sand will enter the mounting portion 11 of the hub along with the air when the wheel hub rotates, and accumulate in the mounting portion 11 or on the hub, causing the hub to wear or abnormal noise, affecting the service life of the hub. A sewage discharge surface 113 is provided on at least one of the two sides of the mounting portion 11 along the central axis of the mounting portion 11, that is, the sewage discharge surface 113 can be provided on the air inlet side a or the air outlet side b, or both the air inlet side a and the air outlet side b.

[0063] According to the wheel hub of the embodiment of the present invention, a drainage surface is arranged on the mounting portion 11, so that the sand and dust on the air inlet side a and the air outlet side b can flow away along the drainage surface, avoiding the accumulation of sand and dust in the mounting portion 11, and reducing the accumulation of sand and dust on the wheel hub, resulting in uneven force on the wheel hub, jamming or abnormal noise.

[0064] In addition, the setting of the drainage surface 113 can reduce the dynamic imbalance during the operation of the wheel hub, so that the wheel hub can continue to work stably and avoid damage to the wheel hub. At the same time, a large centrifugal force is generated during the rotation of the wheel hub, and the dust flows away from the drainage surface at a faster speed under the action of centrifugal force and its own gravity, which is conducive to reducing the possibility of dust accumulation in the mounting portion 11.

[0065] Here, dynamic imbalance is a mechanical term for relative dynamic balance, which refers to the phenomenon that parts and components that perform rotating motion vibrate when the machine or mechanism rotates due to shape errors (for example, the inner and outer circles are not coaxial, the cylinder is not round, the generatrix is ​​not straight, the end face is not perpendicular to the axis, etc.) and uneven internal structure, resulting in adverse effects. The dynamic unbalance amount refers to the physical quantity that measures this phenomenon.

[0066] For example, the discharge surface on the mounting portion 11 is arranged to face the air outlet side b. At this time, the discharge surface is inclined along the direction from the air inlet side a to the air outlet side b in the direction away from the central axis of the mounting portion 11, so that the sand and dust flowing toward the air outlet side b can be discharged toward the circumference of the mounting portion 11 of the hub under the action of the centrifugal force generated by the rotation of the hub, which can avoid the sand and dust on the air outlet side b from affecting the rotation of the hub and reduce the possibility of abnormal noise caused by uneven force and vibration of the hub.

[0067] The discharge surface of the mounting portion 11 is arranged to face the air inlet side a, and is inclined toward the central axis of the mounting portion 11 along the direction from the air inlet side a to the air outlet side b. During the rotation of the hub, both the air inlet side a and the air outlet side b are affected by the centrifugal force. The dust on the air inlet side a is discharged toward the outer peripheral side of the mounting portion 11 under the action of the centrifugal force, which can reduce the possibility of the dust adhering to the hub on the air inlet side a.

[0068] Optionally, a drainage surface is formed on both the air inlet side a and the air outlet side b of the mounting portion 11, and the drainage surfaces provided on the air inlet side a and the air outlet side b are symmetrically distributed in a direction perpendicular to the central axis of the mounting portion 11. When the wheel hub rotates, the sand and dust on the air inlet side a and the air outlet side b are discharged from the mounting portion 11 toward the outer peripheral side of the mounting portion 11 in a direction perpendicular to the central axis of the mounting portion 11 under the action of centrifugal force and its own gravity, thereby effectively reducing the influence of the sand and dust on the wheel hub at the air inlet side a and the air outlet side b, and increasing the sand discharge capacity of the wheel hub. In some embodiments, the drainage surface 113 extends along the circumference of the mounting portion 11. The drainage surface 113 is an annular inclined surface, and is provided on one side of the mounting portion 11 adjacent to the center of the mounting portion 11. The centrifugal force generated by the circumferential rotation of the wheel hub is distributed along the circumference of the mounting portion 11, and the circumferentially extending drainage surface 113 can better discharge the sand and dust, thereby reducing the influence of the sand and dust on the rotation of the wheel hub.

[0069] In some embodiments, Figure 4-Figure 10 As shown, at least one sand discharge hole 112 is formed on the mounting portion 11, and the sand discharge hole 112 penetrates the mounting portion 11 from the air inlet side a to the air outlet side b, and the sand discharge hole 112 intersects with the sewage discharge surface 113. The sand discharge hole 112 is formed on the mounting portion 11, and there are multiple sand discharge holes 112, and the multiple sand discharge holes 112 are arranged at intervals along the circumference of the mounting portion 11, and the sand discharge holes 112 are formed on the sewage discharge surface 113. When sand and dust pass through the fan 100 with the air under the action of the fan 100, part of the sand and dust is blocked by the mounting portion 11 and slides down on the air inlet side a of the mounting portion, and part of the sand and dust enters the fan 100 from the sand discharge hole 112 and slides down from the air outlet side b of the mounting portion 11.

[0070] When the wheel hub rotates, the dust entering from the air inlet side a flows to the air outlet side b. Taking the discharge surface 113 as an example, the side opposite to the mounting portion 11 and located on the air outlet side b along the central axis direction of the mounting portion 11 will form a negative pressure area due to the different air flow rate from the surrounding area. Part of the dust on the air outlet side b will flow back into the mounting portion 11, and the sand discharge hole 112 will intersect with the discharge surface 113, so that the airflow generated by the air in the sand discharge hole 112 can blow away the dust on the discharge surface 113, thereby avoiding the accumulation of dust in the mounting portion 11, resulting in uneven force during the rotation of the wheel hub, and reducing the possibility of vibration and abnormal noise from the wheel hub.

[0071] In some embodiments, the central axis of the sand discharge hole 112 is parallel to the central axis of the mounting portion 11. On the one hand, the central axis of the sand discharge hole 112 is parallel to the central axis of the mounting portion 11, which facilitates the sand and dust to flow from the air inlet side a to the air outlet side b with the air, and increases the flow rate of the air in the sand discharge hole 112, so that the sand and dust can pass more efficiently; on the other hand, it is convenient for the sand discharge hole 112 to be arranged on the sewage discharge surface 113 and intersect with the sewage discharge surface 113, so as to facilitate the removal of sand and dust on the sewage discharge surface 113.

[0072] In some embodiments, Figure 4 and Figure 5 As shown, the wheel hub further includes: a sand retaining structure 20, the sand retaining structure 20 is arranged on the wind outlet side b of the mounting portion 11, and at least one side surface of the sand retaining structure 20 along the circumference of the mounting portion 11 is inclined relative to the central axis of the mounting portion 11. The sand retaining structure 20 is located between two adjacent sand discharge holes 112. In this embodiment, taking the sand retaining structure 20 being arranged on the wind outlet side b and between two adjacent sand discharge holes 112 as an example, one end of the sand retaining structure 20 is connected to the sewage discharge surface 113 of the mounting portion 11, and the other end of the sand retaining structure 20 extends along the central axis direction of the mounting portion 11.

[0073] Here, the mounting portion 11 is a cover-shaped structure, and a receiving groove is provided on one side of the mounting portion 11 adjacent to the air outlet side b, and the sand retaining structure 20 is arranged in the receiving groove. The inclined arrangement of at least one side of the surface of the sand retaining structure 20 along the circumference of the mounting portion 11 may refer to the inclined arrangement of one of the two sides of the sand retaining structure 20 along the circumference, or the inclined arrangement of both sides. In this embodiment, one side of the sand retaining structure 20 is inclined.

[0074] Thus, the sand retaining structure 20 tilted on the air outlet side b can separate the drainage surface 113, prevent the sand and dust between the sand discharge holes 112 from flowing to each other, and increase the sand discharge capacity of the impeller 10 in combination with the drainage surface 113, so that the sand and dust can slide off the sand retaining structure 20 under the action of its own gravity and the centrifugal force generated by the rotation of the hub. At the same time, at least one side of the sand retaining structure 20 is tilted, which can help demoulding when manufacturing the hub, facilitate the formation of the mounting portion 11 and the sand retaining structure 20, reduce the difficulty of manufacturing the hub, and improve the production efficiency of the hub.

[0075] In some embodiments, Figure 5As shown, the two side surfaces of the sand retaining structure 20 along the circumference of the mounting portion 11 are respectively the first surface 21 and the second surface 22, and the first surface 21 is arranged upstream of the second surface 22 along the rotation direction of the hub. That is, as the hub rotates, such as when the hub rotates counterclockwise, part of the air rotates along the circumference of the mounting portion 11, and at this time, the air first passes through the first surface 21 and then passes through the second surface 22, and the first surface 21 is located upstream of the air flow direction relative to the second surface 22. Among them, the first surface 21 is parallel to the central axis of the mounting portion 11, that is, the first surface 21 is arranged perpendicular to the mounting portion 11, so that the air intake in the direction of the centerline axis of the mounting portion 11 is increased during the rotation of the fan 100, and the heat dissipation of the front cabin behind the fan 100 is increased.

[0076] The second surface 22 is inclined relative to the central axis of the mounting portion 11. That is, the second surface 22 is inclined relative to the first surface 21 in the circumferential direction of the mounting portion 11, so that after the sand passes through the sand discharge hole 112, the sand can slide out of the wheel hub by adhering to the surface of the second surface 22 under the action of centrifugal force.

[0077] In this embodiment, the first surface 21 of the sand retaining structure 20 is parallel to the central axis of the mounting portion 11, and the second surface 22 is inclined to the central axis of the mounting portion 11, so as to increase the air volume of the fan 100, improve the sand removal capability, and facilitate the manufacturing and demoulding of the hub, thereby improving production efficiency. The angle between the first surface 21 and the second surface 22 of two adjacent sand retaining structures 20 in the plurality of sand retaining structures 20 is 25°, that is, the angle of inclination of the second surface 22 is 25°, so as to facilitate demoulding and sand sliding.

[0078] In some embodiments, Figure 5 As shown, there are multiple sand retaining structures 20, and the multiple sand retaining structures 20 are arranged at intervals along the circumference of the mounting portion 11. At least one sand discharge hole 112 is provided between each two adjacent sand retaining structures 20, and an angle α is formed between the two adjacent wall surfaces of the two adjacent sand retaining structures 20, and α satisfies: 20°≤α≤30°. For example, the two adjacent sand retaining structures 20 each have a first surface 21 and a second surface 22, and the angle between the first surface 21 of one sand retaining structure 20 and the second surface 22 of the other sand retaining structure 20 is α. If the angle is small, a negative pressure area is formed on the air outlet side b of the mounting portion 11 as the hub rotates, and sand and dust are easily accumulated in the mounting portion 11, and it is not easy to demold when the hub is manufactured, which affects the manufacturing accuracy of the mounting portion 11. If the angle is large, the sand retaining effect of the hub rotating sand retaining structure 20 in the circumferential direction is poor, which affects the sand discharge effect of the hub in the direction of the central axis. Here α = 25°. Thus, the angle between the two adjacent walls of two adjacent sand retaining structures 20 is limited, which, on the one hand, facilitates sand removal and improves the sand removal effect of the wheel hub, and on the other hand, facilitates the removal of the mold when manufacturing the wheel hub.

[0079] In some embodiments, in combination Figure 6-Figure 9 At least one weight-reducing groove 13 is formed on the mounting portion 11, and the weight-reducing groove 13 is located on the air inlet side a, and the sand discharge hole 112 is formed on the bottom wall of the weight-reducing groove 13. That is, a weight-reducing groove 13 is also provided on the mounting portion 11 to reduce the weight of the hub, and the weight-reducing groove 13 is provided on the side of the sand discharge hole 112 away from the center of the mounting portion 11 along the direction perpendicular to the central axis of the mounting portion 11. The weight-reducing groove 13 is formed by a portion of the mounting portion 11 being concave from the air inlet side a to the air outlet side b, so as to reduce the accumulation of sand and dust in the weight-reducing groove 13, so that the sand and dust in the weight-reducing groove 13 can be quickly discharged from the sand discharge hole 112, thereby increasing the air intake of the impeller 10. A sand discharge hole 112 is provided on the side wall of the weight reduction groove 13 adjacent to the air outlet side b. The sand discharge hole 112 is provided at the bottom of the weight reduction groove 13 along the central axis direction of the mounting portion 11, and is provided on one side of the weight reduction groove 13 along the circumferential direction of the mounting portion 11. A portion of the sand and dust entering the fan 100 is blocked at the weight reduction groove 13 and flows back and slides down from the air inlet side a of the mounting portion 11, and a portion of the sand and dust is blown from the sand discharge hole 112 to the air outlet side b.

[0080] Thus, the setting of the weight-reducing groove 13 can facilitate reducing the weight of the impeller 10, realize the lightweight of the impeller 10, make the impeller 10 rotate more smoothly, and can block sand and dust more effectively, so that the sand and dust slide down from the air inlet side a. At the same time, the sand discharge hole 112 set in the weight-reducing groove 13 can further increase the sand discharge capacity of the hub, reduce the accumulation of sand and dust on the hub, so that the sand and dust in the weight-reducing groove 13 can flow away from the sand discharge hole 112, and reduce the accumulation of sand and dust in the weight-reducing groove 13.

[0081] In addition, the provision of the weight-reducing groove 13 and the sand-discharging hole 112 can increase the air intake capacity of the wheel hub and increase the air flow rate, so as to better remove the sand and dust on the discharge surface 113, and facilitate forming a negative pressure environment on the air outlet side b of the wheel hub so that part of the air can enter the mounting portion 11 to dissipate heat for the motor 50.

[0082] In some embodiments, Figure 6 and Figure 7As shown, the sand discharge hole 112 is located upstream of the weight reduction groove 13 along the rotation direction of the hub. The sand discharge hole 112 is arranged upstream of the weight reduction groove 13 along the rotation direction of the impeller 10. For example, when viewed from the air inlet side a, the hub rotates clockwise, and the sand discharge hole 112 is arranged upstream of the weight reduction groove 13, that is, the direction from the upstream end to the downstream end of a weight reduction groove 13 is the same as the rotation direction of the impeller 10. As the impeller 10 rotates, the sand and dust in the weight reduction groove 13 flows toward the side of the weight reduction groove 13 adjacent to the upstream under the action of centrifugal force. The sand discharge hole 112 is arranged on the upstream side to smoothly discharge the sand and dust in the weight reduction groove 13, thereby avoiding the accumulation of sand and dust in the weight reduction groove 13. The upstream of the impeller 10 in the rotation direction can be understood as when the impeller 10 rotates clockwise, the air rotates counterclockwise along the circumference of the mounting portion 11 at the air outlet side b, and the air flows along the circumference of the mounting portion 11 toward the side of the weight reduction groove 13 where the sand discharge hole is provided, that is, the direction of the sand flow is the same as the direction of the hub rotation, and the sand flows toward the sand discharge hole 112 in the weight reduction groove 13 at the air outlet side b. The sand in the weight reduction groove 13 flows to the upstream and gathers at the upstream and flows out from the sand discharge hole 112.

[0083] Therefore, the sand discharge hole 112 is located downstream of the weight reduction groove 13 along the rotation direction of the impeller 10, which can facilitate the sand and dust in the weight reduction groove 13 to flow to the sand discharge hole 112 under the action of centrifugal force, increase the flow rate of the sand and dust in the sand discharge hole 112, facilitate the sand and dust to flow out faster, reduce the possibility of sand and dust adhering to the impeller 10, and reduce the influence of sand and dust on the rotation of the impeller 10.

[0084] In some embodiments, reference Fig. 9 The bottom wall of the weight-reducing groove 13 extends obliquely along the direction from the air inlet side a toward the air outlet side b toward the central axis away from the mounting portion 11 , and the sand discharge hole 112 is formed on one side of the bottom wall of the weight-reducing groove 13 away from the central axis of the mounting portion 11 .

[0085] The bottom wall of the weight-reducing groove 13 extends along the central axis of the mounting portion 11 from the air inlet side a to the air outlet side b gradually in a direction away from the center of the mounting portion 11. The dust in the weight-reducing groove 13 can be concentrated on the side of the weight-reducing groove 13 away from the center of the mounting portion 11 along the central axis of the vertical mounting portion 11 under the action of centrifugal force and gravity, so that the dust entering the weight-reducing groove 13 can be concentrated at the sand discharge hole 112 and then discharged from the sand discharge hole 112 under the action of air flow, which can reduce the accumulation of dust in the weight-reducing groove 13 and reduce the dynamic imbalance of the wheel hub caused by the attachment of dust to the wheel hub. Therefore, the inclined setting of the bottom wall of the weight-reducing groove 13 can facilitate the smooth discharge of the dust entering from the sand discharge hole 112, increase the sand discharge capacity of the sand discharge hole 112, reduce the attachment of dust to the wheel hub, so that the forces on various parts of the wheel hub are balanced, and reduce the wear and vibration of the wheel hub.

[0086] The angle between the bottom wall of the weight-reducing groove 13 and the central axis of the mounting portion 11 is β, where β = 25°. Specifically, the angle of inclination of the bottom wall can be selectively designed according to the specific usage scenario and the difficulty of the process to be implemented. Here, the angle of inclination of the bottom wall includes but is not limited to 25°, such as the angle of the bottom wall relative to the central axis of the mounting portion 11 can be in the range of 0 < α ≤ 90°.

[0087] In some embodiments, Figure 4 , Figure 5 , Figure 8 and Fig. 9 As shown, at least one through hole 111 is formed on the mounting portion 11, and the through hole 111 extends obliquely in the direction from the air inlet side a to the air outlet side b and in the direction away from the central axis of the mounting portion 11. For example, the through hole 111 is arranged on the mounting portion 11 near the edge of the mounting portion 11, and an angle is formed between the central axis of the through hole 111 and the central axis of the mounting portion 11, and the angle is an acute angle, and the dust will gradually flow in the direction away from the center of the mounting portion 11 when flowing from the air inlet side a to the air outlet side b. During the rotation process, the wheel hub generates centrifugal force in the direction perpendicular to the central axis of the mounting portion 11, and the dust entering the wheel hub moves toward the outer peripheral side of the mounting portion 11 under the action of the centrifugal force and its own gravity, so the through hole 111 extends obliquely in the direction away from the central axis, so that the opening direction of the through hole 111 is the same as the direction of the dust flow.

[0088] Therefore, the through hole 111 extends obliquely in a direction away from the central axis of the mounting portion 11, so that dust can be discharged from the through hole 111. At the same time, the centrifugal force of the rotation of the wheel hub can accelerate the flow of the dust, which can further ensure that the dust does not accumulate on the wheel hub, reduce the impact on the stability of the wheel hub rotation, and improve the stability of the wheel hub rotation.

[0089] In some embodiments, Figure 4-Figure 7 As shown, a plurality of sand discharge holes 112 and a plurality of through holes 111 are formed on the mounting portion 11, and the plurality of sand discharge holes 112 and the plurality of through holes 111 are arranged at intervals along the circumference of the mounting portion 11. The plurality of through holes 111 are arranged on the surface of the mounting portion 11 adjacent to the air inlet side a, and the plurality of through holes 111 are arranged on the radial inner side of the plurality of sand discharge holes 112. The through holes 111 and the sand discharge holes 112 are both used for sand discharge. The sand and dust flow radially toward the outside of the mounting portion 11 under the centrifugal force generated by the rotation of the impeller 10 and the gravity thereof. Part of the sand and dust that flows back on the air inlet side a of the through holes 111 flows into the weight reduction groove 13 and flows out of the sand discharge holes 112. The sand discharge capacity of the sand discharge holes 112 located in the weight reduction groove 13 is stronger than that of the through holes 111, and the centrifugal force generated by the rotation of the impeller 10 can be effectively utilized to accelerate the sand discharge capacity of the impeller 10.

[0090] Optionally, the mounting portion 11 is formed with a drainage surface 113 on the air outlet side b, the drainage surface 113 is arranged facing the air outlet side b, the multiple sand discharge holes 112 are located radially outside the multiple through holes 111 along the mounting portion 11, and the drainage surface 113 is located radially outside the multiple through holes 111 along the mounting portion 11.

[0091] A plurality of through holes 111 and a plurality of sand discharge holes 112 are arranged along the radial direction of the mounting portion 11, and the sand discharge holes 112 are arranged on the radial outer side of the through holes 111, and the sewage surface 113 is arranged on the radial outer side of the through holes 111. The sand discharge holes 112 penetrate the side wall where the sewage surface 113 is located, and the sand discharge holes 112 can blow away the sand and dust accumulated on the sewage surface 113. The centrifugal force generated by the rotation of the wheel hub can accelerate the sand and dust to flow toward the through holes 111 and the sand discharge holes 112 along the radial direction of the mounting portion 11, thereby increasing the flow velocity in the through holes 111 and the sand discharge holes 112. The air passing through the through holes 111 can flow to the sewage surface 113 and combine with the sand discharge holes 112 to bring the sand and dust out of the windward side b, thereby increasing the sand discharge capacity of the wheel hub, improving the adhesion of sand and dust on the wheel hub, and increasing the flow of air between the wind inlet side a and the wind outlet side b.

[0092] In some embodiments, in combination Figure 5-Figure 7 , the multiple sand discharge holes 112 and the multiple through holes 111 are respectively opposite. That is, the multiple sand discharge holes 112 and the multiple through holes 111 correspond one to one on the mounting portion 11. The air entering from the through holes 111 can be blown between two adjacent sand retaining structures 20, which helps to discharge the sand and dust on the discharge surface 113, avoids the accumulation of sand and dust between the two adjacent sand retaining structures 20, and can further ensure the accumulation of sand and dust between the two adjacent sand retaining structures 20, thereby increasing the sand discharge effect of the wheel hub.

[0093] Specifically, Figure 6 and Figure 7 As shown, the sand discharge hole 112 deviates from the corresponding through hole 111 in the radial direction of the mounting portion 11, and the sand discharge hole 112 is located downstream of the corresponding through hole 111 in the rotation direction of the hub. The sand discharge hole 112 along the radial direction of the mounting portion 11 is arranged radially outside the through hole 111, and the through hole 111 and the sand discharge hole 112 are offset in the radial direction of the mounting portion 11. Along the rotation direction of the impeller 10, the sand discharge hole 112 is arranged downstream of the through hole 111, that is, for the through hole 111 and the sand discharge hole 112 in the same orientation, the sand and dust on the surface a of the air inlet side first passes through the through hole 111 and then passes through the sand discharge hole 112. Among them, the sand discharge hole 112 is arranged on the downstream side of the bottom wall of the weight reduction groove 13 along the circumference of the mounting portion 11. If the bottom wall of the weight reduction groove 13 has a first side and a second side in the circumference of the mounting portion 11, and the wheel hub rotates from the second side to the first side, the sand discharge hole 112 is arranged adjacent to the second side, so that sand and dust can be quickly discharged from the sand discharge hole 112 under the action of centrifugal force.

[0094] In some embodiments, Figure 5 , Fig. 9 and Fig.10 As shown, the mounting portion 11 includes: a mounting plate 114, a peripheral wall 115, and a plurality of blades 12. The mounting plate 114 has two axial sides, an air inlet side a and an air outlet side b, respectively. The peripheral wall 115 includes a first sub-wall 1151 and a second sub-wall 1152. One end of the first sub-wall 1151 is connected to the mounting plate 114, and extends in a direction from the air inlet side a to the air outlet side b. The other end of the first sub-wall 1151 extends obliquely in a direction away from the central axis of the mounting plate 114. A side surface of the first sub-wall 1151 adjacent to the central axis of the mounting plate 114 is a sewage discharge surface 113. The first sub-wall 1151 is arranged near the center of the mounting portion 11 along the central axis direction of the vertical mounting portion 11, and extends obliquely from the air inlet side a to the air outlet side b in a direction away from the central axis. The side of the first sub-wall 1151 away from the second sub-wall 1152 is a sewage discharge surface 113, which facilitates the discharge of dust flowing to the air outlet side b along the sewage discharge surface 113.

[0095] One end of the second sub-wall 1152 is connected to the other end of the first sub-wall 1151, that is, the first sub-wall 1151 and the second sub-wall 1152 are adjacent to each other at the air outlet side b of the mounting portion 11, the other end of the second sub-wall 1152 extends toward the air inlet side a, and the first sub-wall 1151 extends obliquely toward the central axis of the mounting portion 11, away from the other end of the second sub-wall 1152. The plurality of blades 12 are all connected to the outer peripheral side of the second sub-wall 1152, and the plurality of blades 12 are spaced apart along the circumference of the mounting plate 114.

[0096] In this embodiment, the peripheral wall 115 is provided with a first sub-wall 1151 and a second sub-wall 1152 along the central axis direction of the vertical mounting portion 11, wherein the first sub-wall 1151 extends obliquely along the air inlet side a to the air outlet side b in a direction away from the central axis, and one end of the first sub-wall 1151 away from the central axis of the mounting portion 11 is connected to the second sub-wall 1152, and one end of the second sub-wall 1152 away from the first sub-wall 1151 extends along the central axis of the mounting portion 11 toward the air inlet side a. The sand retaining structure 20 is provided on a side of the first sub-wall 1151 away from the second sub-wall 1152, and the blades 12 are provided on a side of the second sub-wall 1152 away from the first sub-wall 1151, and a plurality of blades 12 are spaced apart on the outer peripheral side of the second sub-wall 1152. Thus, the provision of the first sub-wall 1151 and the second sub-wall 1152 facilitates the formation of the weight-reducing groove 13 on the air inlet side a, thereby improving the structural strength of the mounting portion 11. At the same time, a sewage discharge surface 113 is formed on the air outlet side b to increase the speed of sand and dust flowing on the air outlet side b, thereby improving the sand discharge capability of the impeller 10 .

[0097] Another wheel hub according to an embodiment of the present invention includes a mounting portion 11, and at least one sand discharge hole 112 is formed on the mounting portion 11, and the sand discharge hole 112 runs through the mounting portion 11. Therefore, the sand discharge hole 112 is provided on the mounting portion 11, so that as the air flows in the sand discharge hole 112 from the air inlet side a to the air outlet side b, part of the sand and dust can flow from the sand discharge hole 112 to the air outlet side b, taking away the sand and dust on the air outlet side b of the mounting portion 11, avoiding the accumulation of sand and dust on the air outlet side b, increasing the flow of air on the air inlet side a and the air outlet side b, improving the negative pressure area formed by the mounting portion 11 on the air outlet side b, and reducing the possibility of sand and dust adhering to the mounting portion 11 due to negative pressure backflow.

[0098] Optionally, the central axis of the sand discharge hole 112 is parallel to the central axis of the mounting portion 11. That is, the sand discharge hole 112 passes through the air inlet side a and the air outlet side b of the mounting portion 11 along the central axis direction of the mounting portion 11, ensuring the flow of air in the sand discharge hole 112 and increasing the flow rate of air in the sand discharge hole 112 so as to better discharge the sand and dust that may be deposited on the air outlet side b of the mounting portion 11.

[0099] Furthermore, there are multiple sand discharge holes 112, and the multiple sand discharge holes 112 are arranged at intervals along the circumference of the mounting portion 11. Thus, the multiple sand discharge holes 112 are arranged at intervals along the circumference of the mounting portion 11 so that when the wheel hub rotates, the sand and dust on the air outlet side b can be blown out from the circumference under the action of centrifugal force and the sand discharge holes 112, thereby reducing the weight of the mounting portion 11 and improving the sand discharge effect of the wheel hub.

[0100] In some embodiments, the sand discharge hole 112 is disposed at the outer periphery of the mounting portion 11. That is, the sand discharge hole 112 is disposed adjacent to the outer periphery of the mounting portion 11. At this time, the sand discharge hole 112 is farther away from the center of the mounting portion 11, and the centrifugal force generated by the rotation of the wheel hub at the outer periphery is larger, which helps to improve the sand discharge effect at the sand discharge hole 112. At the same time, the interference of the setting position of the sand discharge hole 112 on the motor 50 disposed on the air outlet side b of the wheel hub can be reduced, thereby reducing the influence of sand and dust on the motor 50.

[0101] The impeller 10 according to the third aspect of the present invention comprises the hub described in any one of the above items, and the hub is provided with a sand retaining structure 20, a sand discharge hole 112 and a sewage discharge surface 113, so that the sand and dust accumulated in the hub can be discharged in time, so as to avoid the accumulation of sand and dust in the hub causing uneven force when the hub rotates, resulting in wear and affecting the service life of the hub, and at the same time, the noise generation can be reduced and the comfort of use can be improved. The fan 100 according to the fourth aspect of the present invention comprises: a wind shield 30, an impeller 10, an opening 31 is formed on the wind shield 30, and the impeller 10 is the impeller 10 of any one of the above embodiments, and the impeller 10 is arranged at the opening 31. That is, at least one side of the wind shield 30 along the central axis direction of the mounting portion 11 is open to form the opening 31, and the impeller 10 is installed in the wind shield 30 from the opening 31, and the wind shield 30 can protect the impeller 10 and prevent more sand and dust from entering the front cabin.

[0102] Furthermore, a wind shield 32 is provided at the opening 31, and a sand discharge port 321 is formed at the bottom of the wind shield 32, and the sand discharge port 321 is opposite to the impeller 10. During the rotation of the impeller 10, the sand and dust that flows back from the air inlet side a of the fan 100 and the sand and dust that slides down from the through hole 111 and the sand discharge hole 112 will fall into the wind shield 32, fall into the sand discharge port 321 along the circumference of the wind shield 32, and flow away from the sand discharge port 321. The wind shield 32 can be fixedly mounted on the wind shield 30, or the wind shield 32 and the wind shield 30 are integrally formed. Therefore, a sand discharge port 321 is provided at the bottom of the wind shield 32 so that the sand and dust that fall during the operation of the fan 100 can flow away from the sand discharge port 321, thereby preventing the sand and dust from accumulating at the bottom of the wind shield 32.

[0103] In some embodiments, Figure 3 and Figure 8 As shown, the fan 100 further includes: a sand discharge valve 40, which is arranged at the sand discharge port 321. When the force exerted by the fluid at the sand discharge port 321 on the sand discharge valve 40 reaches the opening force of the sand discharge valve 40, the sand discharge port 321 opens, and when the force exerted by the fluid at the sand discharge port 321 on the sand discharge valve 40 does not reach the opening force of the sand discharge valve 40, the sand discharge port 321 closes. That is, as the fan 100 works, the sand and dust that enter the fan 100 and fall into the sand discharge port 321 accumulates. When the weight generated by the accumulated sand and dust is greater than the force exerted by the sand discharge valve 40 on the sand discharge port 321, the sand discharge port 321 opens, and the accumulated sand and dust flows away from the sand discharge port 321. When the weight accumulated at the sand discharge port 321 is less than the force acting on the sand discharge port 321 by the sand discharge valve 40, the sand discharge valve 40 closes the sand discharge port 321 to increase the stability of the air flow in the fan 100 when the sand discharge is not needed, and reduce the influence of the unstable air flow on the stability of the rotation of the impeller 10 when the sand discharge valve 40 is opened, so that the impeller 10 can maintain good stability and improve the quietness and reliability of the operation of the fan 100.

[0104] In some embodiments, Figure 8-Figure 10 As shown, the sand discharge valve 40 includes: a sand discharge baffle 41 and at least one elastic reset member. The sand discharge baffle 41 is openably and closably arranged at the sand discharge port 321, and the sand discharge baffle 41 is rotatably connected to the wind shield 32. The elastic reset member is configured to make the sand discharge baffle 41 always close the sand discharge port 321. A mounting groove is provided on the wind shield 30 at a position opposite to the sand discharge port 321, and the elastic reset member is arranged in the mounting groove. The elastic reset member can be a spiral spring or a torsion spring. One end of the elastic reset member abuts against the sand discharge baffle 41, and the other end abuts against the wind shield 30. The sand discharge baffle 41 rotates in a direction away from the sand discharge port 321 under an external force, and the sand discharge baffle 41 closes the sand discharge port 321 when the external force is less than the force of the elastic reset member.

[0105] Thus, the setting of the sand discharge valve 40 can realize the automatic opening and closing of the sand discharge port 321, and the structure of the sand discharge valve 40 is simple, easy to design and install, and has a good sand discharge effect, which can effectively reduce the sand discharge cost. Here, the external force can be the gravity of the sand at the sand discharge port 321 or the combined force of gravity and the centrifugal force. The sand discharge valve 40 for closing and opening the sand discharge port 321 is not limited and can be a solenoid valve.

[0106] Further, the sand discharge valve 40 also includes at least one rotating shaft 42, the rotating shaft 42 is rotatably arranged on the wind protection ring 32, the sand discharge baffle 41 is connected to the rotating shaft 42, and the elastic reset member is sleeved on the rotating shaft 42 to drive the sand discharge baffle 41 to open and close the sand discharge port 321. The rotating shaft 42 is rotatably arranged on the wind protection ring 32, the sand discharge baffle 41 is connected to the rotating shaft 42, the elastic reset member is connected between the rotating shaft 42 and the wind protection ring 32, and the elastic reset member is sleeved on the rotating shaft 42 so that the rotating shaft 42 forms support and limit for the elastic reset member and the sand discharge baffle 41. In some embodiments, the fan 100 further includes: a motor 50, the motor 50 is arranged at the mounting part 11, the motor 50 includes a rotor, and the mounting part 11 is connected to the rotor. That is, the motor 50 is arranged on the side of the mounting part 11 adjacent to the air outlet side b, the rotor is installed with the mounting part 11, and the working rotor of the motor 50 drives the mounting part 11 to rotate together to realize air intake.

[0107] A vehicle according to an embodiment of the third aspect of the present invention comprises the fan 100 according to any one of the above embodiments.

[0108] According to the vehicle of the embodiment of the present invention, a fan 100 with sand removal capability is arranged in the front cabin of the vehicle, so that when the vehicle is driving in an extreme environment such as a desert area, due to the perennial wind and sand in the desert area, the fan 100 will bring in more sand and dust while cooling. A plurality of sand removal holes 112 and sand removal ports 321 are arranged on the mounting portion 11 of the fan 100, so that the sand and dust on the fan 100 can be discharged in time, effectively avoiding the accumulation of sand and dust on the fan 100, and reducing the influence of the stability of the rotation of the multi-impeller 10. In addition, due to the arrangement of the through hole 111 and the sand removal hole 112 and the sand retaining structure 20 on the fan 100, the sand and dust can be accelerated to flow out under the action of the centrifugal force generated by the fan 100 and the gravity of the sand and dust itself during the rotation of the fan 100, thereby improving the sand removal effect of the fan 100, ensuring the safe operation of the fan 100, and improving the service life of the vehicle. At the same time, the provision of multiple sand discharge holes 112 and sand discharge ports 321 can increase the circulation of air between the air inlet side a and the air outlet side b, increase the heat dissipation effect on the engine or drive motor in the front cabin, and can form a negative pressure environment on the air outlet side b of the fan 100 to increase the heat dissipation of the motor 50 of the fan 100 by air reflux.

[0109] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0110] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0112] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wheel hub, characterized in that: include: A mounting portion, wherein two axial sides of the mounting portion are respectively an air inlet side and an air outlet side; A sewage discharge surface is formed on the mounting portion, and the sewage discharge surface is inclined along the direction from the air inlet side to the air outlet side.

2. The wheel hub according to claim 1, characterized in that: The dirt discharge surface faces the air outlet side, and along the direction from the air inlet side to the air outlet side, the dirt discharge surface is inclined toward a direction away from the central axis of the mounting portion.

3. The wheel hub according to claim 1, characterized in that: The dirt discharge surface faces the air inlet side, and along the direction from the air inlet side to the air outlet side, the dirt discharge surface is inclined toward a direction close to the central axis of the mounting portion.

4. The wheel hub according to claim 1, characterized in that The drainage surface extends along the circumference of the mounting portion.

5. The wheel hub according to claim 1, characterized in that: At least one sand discharge hole is formed on the mounting portion, the sand discharge hole passes through the mounting portion, and the sand discharge hole intersects with the sewage discharge surface.

6. The wheel hub according to claim 5, characterized in that The central axis of the sand discharge hole is parallel to the central axis of the mounting portion.

7. The wheel hub according to claim 1, characterized in that The wheel hub also includes: A sand retaining structure is provided on the air outlet side of the mounting portion, and the sand retaining structure is provided obliquely with respect to the central axis of the mounting portion along at least one side surface of the mounting portion in the circumferential direction.

8. The wheel hub according to claim 7, characterized in that: The two side surfaces of the sand retaining structure along the circumference of the mounting portion are respectively a first surface and a second surface, and the first surface is arranged upstream of the second surface along the rotation direction of the hub; The first surface is parallel to the central axis of the mounting portion, and the second surface is inclined relative to the central axis of the mounting portion.

9. The wheel hub according to claim 7, characterized in that: There are multiple sand retaining structures, and the multiple sand retaining structures are arranged at intervals along the circumference of the mounting portion; An angle α is formed between two adjacent wall surfaces of two adjacent sand retaining structures, and the angle α satisfies: 20°≤α≤30°.

10. The wheel hub according to claim 5, characterized in that At least one weight-reducing groove is formed on the mounting portion, the weight-reducing groove is located on the air inlet side, and the sand discharge hole is formed on the bottom wall of the weight-reducing groove.

11. The wheel hub according to claim 10, characterized in that The sand discharge hole is located upstream of the weight reduction groove along the rotation direction of the wheel hub.

12. The wheel hub according to claim 10, characterized in that Along the direction from the air inlet side toward the air outlet side, the bottom wall of the weight-reducing groove extends obliquely in a direction away from the central axis of the mounting portion, and the sand discharge hole is formed on a side of the bottom wall of the weight-reducing groove away from the central axis of the mounting portion.

13. The wheel hub according to claim 1, characterized in that At least one through hole is formed on the mounting portion, and the through hole extends obliquely in a direction from the air inlet side toward the air outlet side and in a direction away from the central axis of the mounting portion.

14. The wheel hub according to claim 1, characterized in that A plurality of sand discharge holes are formed on the mounting portion, and the plurality of sand discharge holes are arranged at intervals along the circumference of the mounting portion.

15. The wheel hub according to claim 1, characterized in that A plurality of through holes are formed on the mounting portion, and the plurality of through holes are arranged at intervals along the circumference of the mounting portion.

16. The wheel hub according to claim 1, characterized in that The mounting portion is formed with a plurality of sand discharge holes, a plurality of through holes and at least one sewage discharge surface. The plurality of sand discharge holes are located radially outside the plurality of through holes along the mounting portion, and the sewage discharge surface is located radially outside the plurality of through holes along the mounting portion.

17. The wheel hub according to claim 16, characterized in that The plurality of sand discharge holes and the plurality of through holes are respectively opposite to each other.

18. The wheel hub according to any one of claims 1 to 17, characterized in that: The installation part comprises: A mounting plate, wherein two axial sides of the mounting plate are respectively an air inlet side and an air outlet side; A peripheral wall, the peripheral wall includes a first sub-wall and a second sub-wall, one end of the first sub-wall is connected to the mounting plate, and extends in a direction from the air inlet side to the air outlet side, and the other end of the first sub-wall is inclined toward a direction away from the central axis of the mounting plate, a side surface of the first sub-wall adjacent to the central axis of the mounting plate is the sewage discharge surface, one end of the second sub-wall is connected to the other end of the first sub-wall, and the other end of the second sub-wall extends toward the direction of the air inlet side.

19. A wheel hub, characterized in that: include: The mounting portion is formed with at least one sand discharge hole, and the sand discharge hole passes through the mounting portion.

20. The wheel hub according to claim 19, characterized in that The central axis of the sand discharge hole is parallel to the central axis of the mounting portion.

21. The wheel hub according to claim 19, characterized in that There are a plurality of sand discharge holes, and the plurality of sand discharge holes are arranged at intervals along the circumference of the mounting portion.

22. The wheel hub according to claim 19, characterized in that The sand discharge hole is arranged on the outer periphery of the mounting portion.

23. An impeller, characterized in that: Comprising a hub according to any one of claims 1-18 or a hub according to any one of claims 19-22.

24. A fan, characterized in that: include: A wind shield, wherein an opening is formed on the wind shield; An impeller, wherein the impeller is the impeller according to claim 23, and the impeller is arranged at the opening.

25. The fan according to claim 24, characterized in that A wind protection ring is arranged at the opening, a sand discharge port is formed at the bottom of the wind protection ring, and the sand discharge port is opposite to the impeller.

26. The fan according to claim 25, characterized in that Also includes: A sand discharge valve is provided at the sand discharge port. When the force exerted by the fluid at the sand discharge port on the sand discharge valve reaches the opening force of the sand discharge valve, the sand discharge port opens; when the force exerted by the fluid at the sand discharge port on the sand discharge valve does not reach the opening force of the sand discharge valve, the sand discharge port closes.

27. The fan according to claim 26, characterized in that The sand discharge valve comprises: A sand discharge baffle, which is openably and closably arranged at the sand discharge port, and is rotatably connected to the wind protection ring; At least one elastic reset member is configured to make the sand discharge baffle plate always close the sand discharge port.

28. The fan according to claim 27, characterized in that Further including: At least one rotating shaft is rotatably arranged on the wind protection ring, the sand discharge baffle is connected to the rotating shaft, and the elastic reset member is sleeved on the rotating shaft to drive the sand discharge baffle to open and close the sand discharge port.

29. The fan according to any one of claims 24 to 28, characterized in that: Further including: A motor is provided at the mounting portion, the motor comprises a rotor, and the mounting portion is connected to the rotor.

30. A vehicle, characterized in that: Comprising a fan according to any one of claims 24-29.

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