CN220929773U - Flow guiding structure of fan - Google Patents

Abstract

The utility model relates to the technical field of fans, and provides a fan flow guiding structure, wherein a shell comprises an end cover and a shell main body, and a plurality of support columns are convexly arranged on one side of the end cover, which is opposite to a containing cavity; the first guide cover is sleeved outside the shell main body, the rotating shaft penetrates through the bottom wall of the shell main body and is fixed with the bottom wall of the first guide cover, fan blades are arranged on the peripheral wall of the first guide cover, ventilation holes are formed in the bottom wall of the first guide cover, and a first guide channel is formed between the first guide cover and the shell main body; the second guide cover comprises a first guide surface and a second guide surface, the first guide surface is annularly fixed with the support column along the axial direction of the rotating shaft, the second guide surface is sleeved on the periphery of the shell and is arranged in a clearance way, and a second guide channel is formed between the second guide cover and the shell; when the fan blade rotates, part of air flow can pass through the air holes, the first diversion channel and the second diversion channel in sequence and flow to the end face of the end cover, so that heat can be dissipated for the shell main body and the end cover.

Description

Flow guiding structure of fan

Technical Field

The utility model relates to the technical field of fans, in particular to a fan flow guiding structure.

Background

Along with the increasing scenes that the direct current brushless cooling fan is used as a power source of a cooling tool, the requirements on the tightness and the cooling performance of the direct current brushless cooling fan are higher.

Common, radiator fan includes sealed shell, and its internally mounted has PCBA board and drive assembly, and when PCBA board and drive assembly were operated, it all can produce the heat, owing to be in sealed shell, can't adopt ventilation drainage's mode, carries out the direct cooling to it, so can only pass through the heat transfer of self to sealed shell, and rethread sealed shell carries out heat exchange with external environment, and then reduces the inside temperature of casing.

However, as the requirements of the use scene on the heat dissipation efficiency are gradually increased, the power of the heat dissipation fan is also increased, the heat generated by the PCBA board and the driving assembly is also increased, and the heat dissipation requirement is difficult to be achieved by simply relying on the passive heat dissipation of the shell.

Therefore, a fan guiding structure is needed to solve the above-mentioned problems.

Disclosure of utility model

The utility model aims to provide a fan flow guiding structure which can be used for actively radiating heat for a shell main body and actively radiating heat for an end cover.

To achieve the purpose, the utility model adopts the following technical scheme:

fan water conservancy diversion structure includes:

The shell comprises an end cover and a shell main body, a containing cavity is formed in the shell and used for installing a PCBA board and a driving assembly, the driving assembly comprises a rotating shaft, the rotating shaft is rotationally connected with the shell, and a plurality of support columns are convexly arranged on one side of the end cover, which is opposite to the containing cavity;

The first air guide sleeve comprises a bottom wall and a peripheral side wall, the first air guide sleeve is sleeved outside the shell main body, the rotating shaft penetrates through the bottom wall of the shell main body and is fixed with the bottom wall of the first air guide sleeve, fan blades are arranged on the peripheral wall of the first air guide sleeve, air holes are formed in the bottom wall of the first air guide sleeve, and a first air guide channel is formed between the first air guide sleeve and the shell main body;

The second guide cover comprises a first guide surface and a second guide surface, the first guide surface is connected with the second guide surface in an L-shaped mode, the first guide surface is fixed with the support column along the axial direction of the rotating shaft in an annular mode, the second guide surface is sleeved on the periphery of the shell and is arranged in a clearance mode, and a second guide channel is formed between the second guide cover and the shell;

When the fan blade rotates, part of air flow can sequentially pass through the air holes, the first diversion channel and the second diversion channel and flow through the end face of the end cover.

As a preferable technical scheme of the fan flow guiding structure, a plurality of air holes are uniformly formed along the circumferential direction of the rotating shaft.

As a preferable technical scheme of the fan diversion structure, the ventilation holes are formed in the circumferential edge of the bottom wall of the first diversion cover.

As a preferable technical scheme of the fan flow guiding structure, the air hole is in a horn shape, and an opening size of one side of the air hole facing the first flow guiding channel is smaller than an opening size of one side of the air hole facing away from the first flow guiding channel.

As a preferable technical scheme of the fan flow guiding structure, the bottom wall of the first flow guiding cover is provided with a plugging hole, and the rotating shaft is plugged with the plugging hole and in interference fit with the first flow guiding cover.

As a preferred technical scheme of the fan flow guiding structure, a bearing chamber is provided on one side of the end cover facing the accommodating cavity, a limit boss is provided on the bearing chamber along an axis of the rotating shaft, the rotating shaft is rotatably connected with the end cover through a bearing, the bearing is disposed in the bearing chamber, the limit boss is axially abutted with the rotating shaft, and a radial dimension of the limit boss is smaller than or equal to a radial dimension of the rotating shaft.

As a preferable aspect of the fan flow guiding structure, the second flow guiding cover includes a first frame, a second frame, and a flow guiding plate, the first flow guiding surface and the second flow guiding surface are formed on the first frame, the second frame is sleeved on an outer peripheral side of the fan blade, and the first frame and the second frame are connected through the flow guiding plate.

As a preferable technical scheme of the fan flow guiding structure, a limiting protrusion is convexly arranged on the outer peripheral wall of the shell, a limiting groove is correspondingly arranged on the first frame, and the limiting protrusion and the limiting groove are inserted in the axial direction of the rotating shaft.

As a preferable technical solution of the fan flow guiding structure, a reinforcing rib is protruding from an outer peripheral wall of the second frame, and the reinforcing rib extends along an axial direction of the rotating shaft.

As a preferable technical scheme of the fan flow guiding structure, the inner shaft of the second frame is provided with a limit rib along a convex shape, the limit rib extends along a circumferential direction of the second frame, is located between the fan blade and the flow guiding plate, and can be abutted with the fan blade along an axial direction.

The utility model has the beneficial effects that:

The application provides a fan flow guiding structure which comprises a shell, a first flow guiding cover and a second flow guiding cover. The shell comprises an end cover and a shell main body, a containing cavity is formed in the shell and used for installing the PCBA board and the driving assembly, the driving assembly comprises a rotating shaft, the rotating shaft is rotationally connected with the shell, and a plurality of supporting columns are convexly arranged on one side of the end cover, which faces away from the containing cavity; the first air guide sleeve comprises a bottom wall and a peripheral side wall, the first air guide sleeve is sleeved outside the shell main body, the rotating shaft penetrates through the bottom wall of the shell main body and is fixed with the bottom wall of the first air guide sleeve, fan blades are arranged on the peripheral wall of the first air guide sleeve, air holes are formed in the bottom wall of the first air guide sleeve, and a first air guide channel is formed between the first air guide sleeve and the shell main body; the second guide cover comprises a first guide surface and a second guide surface, the first guide surface is connected with the second guide surface in an L-shaped manner, the first guide surface is fixed with the support column along the axial direction of the rotating shaft in an annular manner, the second guide surface is sleeved on the periphery of the shell and is arranged in a clearance manner, and a second guide channel is formed between the second guide cover and the shell; when the fan blade rotates, part of air flow can sequentially pass through the air holes, the first diversion channel and the second diversion channel and flow to the end face of the end cover. So set up, build first water conservancy diversion passageway through first kuppe and shell main part, the second water conservancy diversion is looked for and is formed the second water conservancy diversion passageway with the partial side perisporium of shell main part and the partial terminal surface of end cover, and when drive assembly started, the air current that the flabellum produced can dispel the heat to the part of shell main part namely stator assembly when first water conservancy diversion passageway, can cool off the peripheral wall of remaining partial shell main part when flowing through the second water conservancy diversion passageway, and can also change the wind direction, with the terminal surface contact of end cover, for its heat dissipation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a fan flow guiding structure according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a fan baffle structure according to an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a first pod according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a second pod according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an end cap according to an embodiment of the present utility model.

In the figure:

11. An end cap; 111. a bearing chamber; 112. a limit boss; 12. a case main body;

20. PCBA board;

30. A drive assembly; 31. a rotating shaft; 32. a bearing;

40. a first pod; 41. a fan blade; 42. ventilation holes; 43. a first flow directing channel; 44. a plug hole;

50. a second pod; 51. a first guide surface; 52. a second guide surface; 53. a second flow directing channel; 54. a first frame; 541. a limit groove; 55. a second frame; 551. reinforcing ribs; 552. a limit rib; 56. and a deflector.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 5, the present application provides a fan guide structure, which includes a housing, a first guide casing 40 and a second guide casing 50. The shell comprises an end cover 11 and a shell main body 12, a containing cavity is formed in the shell and used for installing the PCBA 20 and the driving assembly 30, the driving assembly 30 comprises a rotating shaft 31, the rotating shaft 31 is rotationally connected with the shell, and a plurality of supporting columns are convexly arranged on one side of the end cover 11, which is opposite to the containing cavity; the first air guide sleeve 40 comprises a bottom wall and a peripheral side wall, the first air guide sleeve 40 is sleeved outside the shell main body 12, the rotating shaft 31 penetrates through the bottom wall of the shell main body 12 and is fixed with the bottom wall of the first air guide sleeve 40, the fan blades 41 are arranged on the peripheral wall of the first air guide sleeve 40, the bottom wall of the first air guide sleeve 40 is provided with air holes 42, and a first air guide channel 43 is formed between the first air guide sleeve 40 and the shell main body 12; the second guide cover 50 comprises a first guide surface 51 and a second guide surface 52, the first guide surface 51 and the second guide surface 52 are connected in an L shape, the first guide surface 51 is annularly fixed with the support column along the axial direction of the rotating shaft 31, the second guide surface 52 is sleeved on the periphery of the shell and is arranged in a gap, and a second guide channel 53 is formed between the second guide cover 50 and the shell; when the fan blade 41 rotates, part of the airflow can sequentially pass through the ventilation holes 42, the first diversion channel 43 and the second diversion channel 53 and flow through the end face of the end cover 11.

Specifically, shell main part 12 includes diapire and week lateral wall, forms the cavity, and end cover 11 is in the opening of cavity and is in the side of the week lateral wall of casing and faces away from its diapire fixed, forms the accommodation chamber, and PCBA board 20 and drive assembly 30 are placed in the accommodation intracavity, and PCBA board 20 laminating and the main heat dissipation of relying on end cover 11 of end cover 11, drive assembly 30 include rotor assembly and stator assembly, and wherein, stator assembly is fixed and relies on shell main part 12 heat dissipation with shell main part 12, and the rotor assembly can rotate relative stator assembly, the rotor assembly includes pivot 31. The first air guide sleeve 40 is sleeved outside the shell main body 12, a first air guide channel 43 is formed by a gap between the inner wall of the first air guide sleeve 40 and the outer wall of the shell main body 12, the fan blades 41 are further fixed on the outer periphery side of the first air guide sleeve 40, when the driving component 30 is driven, the rotor assembly rotates relative to the stator assembly, the rotating shaft 31 drives the first air guide sleeve 40 to rotate, partial air flow generated when the fan blades 41 rotate can enter the first air guide channel 43 from the air holes 42, and the air flow contacts with the outer wall of the shell main body 12 in the first air guide channel 43 to perform heat exchange to dissipate heat. The end cover 11 extends from the first air guide sleeve 40, the second air guide sleeve 50 is sleeved on one side of the shell main body 12 close to the end cover 11, the first air guide surface 51 of the second air guide sleeve is fixed with the support column of the end cover 11 along the axial direction of the rotating shaft 31, the second air guide surface 52 and a part of the second air guide channels 53 formed on the peripheral side wall of the shell main body 12 are used for receiving air discharged from the first air guide channels 43, and the part of the second air guide channels 53 formed between the first air guide surface 51 and the end cover 11 are used for adjusting air flow moving along the axial direction of the rotating shaft 31 into air flow flowing along the end face of the end cover 11.

So set up, build first water conservancy diversion passageway 43 through first kuppe 40 and shell main part 12, second water conservancy diversion passageway 53 is formed with the partial side perisporium of shell main part 12 and the partial terminal surface of end cover 11 to second water conservancy diversion cover 50, when drive assembly 30 starts, the air current that flabellum 41 produced can dispel the heat to a part of shell main part 12 and stator assembly when passing through first water conservancy diversion passageway 43, can cool off the peripheral wall of remaining partial shell main part 12 when flowing through second water conservancy diversion passageway 53, change the wind direction after, with the terminal surface contact of end cover 11, for its heat dissipation.

Optionally, a plurality of ventilation holes 42 are uniformly formed along the circumferential direction of the rotating shaft 31. By the arrangement, air flows can enter the first diversion channel 43 from the plurality of air holes 42 respectively, the smoothness of the channel is kept, and the situation that the whole first diversion channel 43 is blocked when one air hole 42 is blocked can be avoided.

Optionally, the ventilation holes 42 are formed in the circumferential edge of the bottom wall of the first pod 40. So arranged, in the axial projection along the rotating shaft 31, the ventilation holes 42 are only partially overlapped or completely not overlapped with the bottom wall of the shell main body 12, so that when the air flow enters the first diversion channel 43, the impact with the bottom wall of the shell main body 12 is avoided, and turbulence is caused.

Optionally, the vent hole 42 is in a horn shape, and the opening size of the side facing the first diversion channel 43 is smaller than the opening size of the side facing away from the first diversion channel 43. Thus, the ventilation holes 42 are arranged in a horn mouth shape, so that the purpose of diversion is achieved.

Optionally, a plugging hole 44 is formed in the bottom wall of the first pod 40, and the rotating shaft 31 is plugged into the plugging hole 44 and is in interference fit with the first pod 40. So configured, the first pod 40 and the drive assembly 30 are conveniently assembled and disassembled.

Optionally, a bearing chamber 111 is provided on one side of the end cover 11 facing the accommodating cavity, a limiting boss 112 is provided on the bearing chamber 111 along the axis of the rotating shaft 31, the rotating shaft 31 is rotationally connected with the end cover 11 through a bearing 32, the bearing 32 is disposed in the bearing chamber 111, the limiting boss 112 is axially abutted with the rotating shaft 31, and the radial dimension of the limiting boss 112 is smaller than or equal to the radial dimension of the rotating shaft 31. Specifically, the bearing 32 is disposed in the bearing chamber 111, the bearing chamber 111 limits the relative movement of the bearing 32, the outer ring of the bearing 32 is in interference fit with the end cover 11, the inner ring of the bearing 32 is in interference fit with the rotating shaft 31, when the first air guide sleeve 40 is fixed with the rotating shaft 31, the first air guide sleeve 40 needs to be pressed along the axial direction of the rotating shaft 31, at this time, the support column in the bearing chamber 111 can support the rotating shaft 31 along the axial direction of the rotating shaft 31, so that the bearing 32 is in a suspended state, the axial extrusion of the bearing 32 can be reduced, and the dislocation of the inner ring and the outer ring of the bearing can be further caused

Optionally, the second pod 50 includes a first frame 54, a second frame 55, and a baffle 56, where the first and second guide surfaces 51 and 52 are formed on the first frame 54, the second frame 55 is sleeved on the outer peripheral side of the fan blade 41, and the first and second frames 54 and 55 are connected by the baffle 56. So configured, the air flow generated when the fan blades 41 rotate is integrated and split by the guide plate 56.

Optionally, a limiting protrusion is protruding on the outer peripheral wall of the housing, and a limiting groove 541 is correspondingly disposed on the first frame 54, where the limiting protrusion and the limiting groove 541 are inserted along the axial direction of the rotating shaft 31. So set up, when the installation, alignment spacing protruding and spacing groove 541 earlier, then peg graft along the axial, simplified alignment work, and spacing protruding and spacing groove 541's grafting also can play the circumstances that restriction first frame 54 takes place relative casing along the axis pivoted of pivot 31.

Alternatively, the outer circumferential wall of the second frame 55 is convexly provided with a reinforcing rib 551, and the reinforcing rib 551 extends in the axial direction of the rotation shaft 31. So arranged, the structural strength of the second frame 55 is enhanced.

When the rotating shaft 31 drives the first air guide sleeve 40 to rotate, the rotating shaft 31 may swing radially, the first air guide sleeve 40 may also swing, and both the above two conditions may cause the front and back swing at the two radial ends of the fan blade 41, so as to cause the fan blade 41 to collide with the air guide plate 56, for this reason, in this embodiment, the inner shaft of the second frame 55 is convexly provided with a limiting rib 552, and the limiting rib 552 extends along the circumferential direction of the second frame 55, and is located between the fan blade 41 and the air guide plate 56 and can be abutted with the fan blade 41 along the axial direction. The limiting rib 552 is used for limiting the swing of the fan blade 41, so that the fan blade is always spaced from the deflector 56.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. Fan water conservancy diversion structure, its characterized in that includes:

The shell comprises an end cover (11) and a shell main body (12), a containing cavity is formed in the shell and used for installing a PCBA board (20) and a driving assembly (30), the driving assembly (30) comprises a rotating shaft (31), the rotating shaft (31) is rotationally connected with the shell, and a plurality of supporting columns are convexly arranged on one side, opposite to the containing cavity, of the end cover (11);

The first air guide sleeve (40), the first air guide sleeve (40) comprises a bottom wall and a peripheral side wall, the first air guide sleeve (40) is sleeved outside the shell main body (12), the rotating shaft (31) penetrates through the bottom wall of the shell main body (12) and is fixed with the bottom wall of the first air guide sleeve (40), fan blades (41) are arranged on the peripheral wall of the first air guide sleeve (40), ventilation holes (42) are formed in the bottom wall of the first air guide sleeve (40), and a first air guide channel (43) is formed between the first air guide sleeve (40) and the shell main body (12);

The second air guide sleeve (50), the second air guide sleeve (50) comprises a first air guide surface (51) and a second air guide surface (52), the first air guide surface (51) and the second air guide surface (52) are connected in an L shape, the first air guide surface (51) is annularly fixed with the support column along the axial direction of the rotating shaft (31), the second air guide surface (52) is sleeved on the periphery of the shell and is arranged in a clearance way, and a second air guide channel (53) is formed between the second air guide sleeve (50) and the shell;

When the fan blades (41) rotate, part of air flow can sequentially pass through the air holes (42), the first diversion channels (43) and the second diversion channels (53) and flow through the end faces of the end covers (11).

2. The fan guide structure according to claim 1, wherein the ventilation holes (42) are uniformly formed in a plurality along a circumferential direction of the rotation shaft (31).

3. The fan baffle structure according to claim 1, wherein the ventilation holes (42) are opened at a circumferential edge of the bottom wall of the first pod (40).

4. The fan flow guiding structure according to claim 1, wherein the ventilation holes (42) are in a horn shape, and an opening size of a side of the ventilation holes facing the first flow guiding channel (43) is smaller than an opening size of a side of the ventilation holes facing away from the first flow guiding channel (43).

5. The fan flow guiding structure according to claim 1, wherein the bottom wall of the first flow guiding cover (40) is provided with a plugging hole (44), and the rotating shaft (31) is plugged with the plugging hole (44) and is in interference fit with the first flow guiding cover (40).

6. The fan flow guiding structure according to claim 5, wherein a bearing chamber (111) is provided on one side of the end cover (11) facing the accommodating cavity, a limit boss (112) is provided on the bearing chamber (111) along the axis of the rotating shaft (31), the rotating shaft (31) and the end cover (11) are rotationally connected through a bearing (32), the bearing (32) is disposed in the bearing chamber (111), the limit boss (112) is axially abutted with the rotating shaft (31), and the radial dimension of the limit boss (112) is smaller than or equal to the radial dimension of the rotating shaft (31).

7. The fan guide structure according to any one of claims 1 to 6, wherein the second guide cover (50) includes a first frame (54), a second frame (55) and a guide plate (56), the first guide surface (51) and the second guide surface (52) are formed on the first frame (54), the second frame (55) is sleeved on an outer peripheral side of the fan blade (41), and the first frame (54) and the second frame (55) are connected through the guide plate (56).

8. The fan flow guiding structure as claimed in claim 7, wherein a limiting protrusion is protruding from an outer peripheral wall of the housing, and a limiting groove (541) is correspondingly provided on the first frame (54), and the limiting protrusion and the limiting groove (541) are inserted along an axial direction of the rotating shaft (31).

9. The fan guide structure according to claim 7, wherein the outer peripheral wall of the second frame (55) is provided with a reinforcing rib (551) in a protruding manner, and the reinforcing rib (551) extends in the axial direction of the rotating shaft (31).

10. The fan flow guiding structure according to claim 7, wherein the inner shaft of the second frame (55) is convexly provided with a limiting rib (552), and the limiting rib (552) extends along the circumferential direction of the second frame (55) and is located between the fan blade (41) and the flow guiding plate (56) and can be in axial abutting connection with the fan blade (41).