CN220470301U

CN220470301U - Cowling and heat dissipation fan

Info

Publication number: CN220470301U
Application number: CN202322223949.5U
Authority: CN
Inventors: 周世文; 姚琦; 杨航; 周杰
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2024-02-09
Anticipated expiration: 2033-08-16

Abstract

The utility model provides a fairing and a heat dissipation fan. The radome fairing is the tubular structure that has the wind-guiding passageway, and the radome fairing includes: a mounting member; the guide vane component is connected to the mounting component, and the guide vane component comprises a plurality of first guide vanes which are arranged at intervals along the circumferential direction of the air guide channel, and the distance between the first guide vanes and the central axis gradually increases along the central axis of the cylindrical structure from the mounting component to the guide vane component. The fairing of the technical scheme of the utility model can reduce the pneumatic noise generated by the rotation of the fan.

Description

Cowling and heat dissipation fan

Technical Field

The utility model relates to the technical field of fans, in particular to a fairing and a cooling fan.

Background

The fan is used as a traditional fluid machine and is widely applied to various fields of national economy such as energy engineering and the like, such as products such as an energy storage alternating current device, a photovoltaic inverter, a charging pile and the like. In order to meet the heat dissipation, a mode of high rotation speed and simultaneous operation of multiple fans is often adopted, so that serious noise pollution is caused, and physical and mental health of people is even affected.

The pneumatic noise is used as a main noise source of the fan, and the pneumatic noise of the fan is mainly divided into discrete noise and broadband noise, wherein the discrete noise of the fan is generated by beating surrounding gas medium in the high-speed rotation process of the blade to cause pressure pulsation of the surrounding gas. The broadband noise of the fan is mainly vortex noise generated by airflow pressure pulsation caused by turbulent boundary layers of blades and falling thereof.

In order to reduce the pneumatic noise of the fan, it has been proposed to provide a structure such as a guide cover, a sound absorbing cotton and a perforated plate on the fan housing, however, the related art has the following main problems:

1. the traditional air guide sleeve is generally of a straight cylinder circular ring structure with constant sectional area, the velocity gradient of air flow at the air inlet is larger, and larger pressure pulsation is easy to generate, so that the pneumatic noise of the fan is higher;

2. the horn mouth of traditional kuppe sets up to the arc chamfer, and the rectification effect is limited, and is not obvious enough to fan aerodynamic noise improvement effect.

Disclosure of Invention

The utility model mainly aims to provide a fairing and a cooling fan, wherein the fairing can reduce pneumatic noise generated by rotation of the fan.

In order to achieve the above object, the present utility model provides a fairing, which is a cylindrical structure having an air guide passage, the fairing comprising: a mounting member; the guide vane component is connected to the mounting component, and the guide vane component comprises a plurality of first guide vanes which are arranged at intervals along the circumferential direction of the air guide channel, and the distance between the first guide vanes and the central axis gradually increases along the central axis of the cylindrical structure from the mounting component to the guide vane component.

Further, the vane member further includes a plurality of second vanes disposed at intervals along the central axis, the first vanes and the second vanes being disposed crosswise to form a plurality of grid holes.

Further, the second guide vanes are connected with the first guide vanes, and the inner diameters of the plurality of second guide vanes are sequentially increased from the direction from the mounting member to the guide vane member.

Further, the plurality of second vanes are disposed at uniform or non-uniform intervals along the central axis.

Further, the second guide vane is an annular structure disposed about the central axis.

Further, the second guide vane comprises a plurality of guide vane segments which are arranged at intervals around the central axis, and each guide vane segment is of an arc-shaped structure extending around the central axis.

Further, the fairing further comprises a connection member for connecting the plurality of first vanes, the vane member being located between the connection member and the mounting member.

Further, at least some of the plurality of first vanes are disposed at uniform intervals about the central axis.

Further, the first guide vane extends along the central axis, and is of an arc-shaped structure protruding towards the side where the central axis is located; alternatively, the first guide vane is of rectangular or trapezoidal configuration.

According to another aspect of the utility model, the utility model provides a heat dissipation fan, which comprises a fan body and the fairing connected with the fan body.

Compared with the prior art that a straight cylinder circular ring structure or a bell mouth air guide sleeve is arranged at any air inlet (air inlet or air outlet) of the fan, in the embodiment, the mounting member is arranged at the air inlet or air outlet of the fan, the inner diameter of the guide vane structure of the air guide sleeve is gradually increased from the direction away from the air outlet or the air inlet, and the plurality of first guide vanes can play a role in transition buffering on air flow so as to slow down the speed gradient of the air flow at the air inlet and the air outlet, and can inhibit an unstable vortex structure at the air inlet and the air outlet area to a certain extent so as to reduce vortex noise generated by high-speed rotation of the fan, thereby reducing pneumatic noise generated by rotation of the fan.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic diagram of one embodiment of a heat dissipation blower of the present utility model;

FIG. 2 shows an exploded view of the heat dissipating fan of FIG. 1;

FIG. 3 shows a schematic structural view of a cowling of the heat dissipating fan of FIG. 1;

FIG. 4 illustrates a front view of the fairing of FIG. 3;

FIG. 5 illustrates a top view of the fairing of FIG. 3;

FIG. 6 shows a schematic structural view of another embodiment of a heat dissipating fan of the present utility model; and

fig. 7 shows a schematic structural diagram of a cowling of the heat dissipating fan of fig. 6.

Wherein the above figures include the following reference numerals:

1. a mounting member; 2. a first guide vane; 3. a second guide vane; 5. a connecting member; 6. a fan body.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that, the embodiments of the present utility model are mainly used for low-noise axial flow heat dissipation fan assemblies.

It should be noted that, in the embodiment of the present utility model, the mounting member 1 and the guide vane member together form a cylindrical structure and enclose the air outlet guide channel, and the cylindrical structure is not limited to a cylinder or a polygonal cylinder.

It should be noted that, in the embodiment of the present utility model, as shown in fig. 1, the cylindrical structure is disposed around a central axis, and the central axis is generally a rotation axis of the fan blade.

As shown in fig. 1 to 7, an embodiment of the present utility model provides a fairing. The fairing is a cylindrical structure with an air guide channel, and comprises a mounting component 1 and a guide vane component. Wherein, the stator component is connected in mounting member 1, and the stator component includes a plurality of first stator 2 that set up along the circumference interval of wind-guiding passageway, along the central axis of tubular structure, from mounting member 1 to the direction of stator component, the distance between first stator 2 and the central axis increases gradually.

Among the above-mentioned technical scheme, for the air intake or the air outlet department of the fan among the prior art sets up straight section of thick bamboo ring structure or horn mouth kuppe, in this embodiment, install mounting member 1 in air intake or air outlet department of fan, the internal diameter of the stator structure of radome gradually increases from the direction of keeping away from air outlet or air intake, and a plurality of first stator can play the effect of transition buffering to the air current, with the velocity gradient of slowing down the air current of air inlet and outlet, and can restrain the unstable vortex structure in access region to a certain extent, in order to reduce the vortex noise that the fan high-speed rotation produced, thereby reduce the rotatory pneumatic noise that produces of fan.

Furthermore, compared with the horn-shaped air guide sleeve, the air guide sleeve provided by the embodiment has low consumable material, and can save cost.

Specifically, in the embodiment of the present utility model, the first guide vane 2 extends outwards from the mounting member 1, and the extending direction thereof is gradually far away from the central axis of the cylindrical structure, so that the distance between the first guide vane 2 and the central axis becomes larger as the first guide vane 2 is gradually far away from the mounting member 1.

As shown in fig. 1, in the embodiment of the present utility model, the guide vane member further includes a plurality of second guide vanes 3 disposed at intervals along the central axis, and the first guide vanes 2 and the second guide vanes 3 are disposed to intersect to form a plurality of grid holes.

Through the arrangement, the first guide vanes 2 and the second guide vanes 3 are staggered to form the grid holes, and the grid holes can rectify air flow, so that air inlet and outlet are more uniform, the speed gradient of the air flow can be reduced, the generation of vortex of the blade tip of the fan is reduced, and the pneumatic noise formed by falling and separation of the vortex of the blade tip of the fan is reduced.

It should be noted that, in the embodiment of the present utility model, the sizes of the plurality of grid holes may be the same or different, and if the sizes of the grid holes around the grid hole are the same, the airflow around the grid hole can be uniform; if the grid holes around the fan are different, the air inlet and outlet quantity of the fan in the peripheral direction can be distributed to a certain extent, and particularly if the air quantity in a certain direction needs to be reduced, the size of the grid holes in the certain direction can be properly reduced.

As shown in fig. 1 and 3, in the embodiment of the present utility model, the second guide vane 3 is connected to the first guide vane 2, and the inner diameters of the plurality of second guide vanes 3 sequentially increase from the mounting member 1 to the guide vane member.

Through the arrangement, the plurality of second guide vanes 3 with the inner diameters increased in sequence can play a role in transition buffering on the airflow, and can reduce the speed gradient of the airflow, so that the unstable vortex structure in the air inlet and outlet areas can be restrained to a certain extent, and vortex noise generated by high-speed rotation of the fan is reduced.

In the embodiment of the present utility model, the plurality of second guide vanes 3 are disposed at uniform intervals or non-uniform intervals along the central axis. Thus, the sizes of the plurality of grill holes can be changed so that the sizes of the plurality of grill holes can be the same or different, and thus the sizes of the grill holes can be set according to the air volume.

As shown in fig. 1 to 5, in one embodiment of the present utility model, the second guide vane 3 is an annular structure disposed around the central axis. Like this, can be equipped with the grid hole on the whole circumference of wind-guiding passageway to make the business turn over wind more even, in order to reduce pneumatic noise.

In another embodiment of the utility model, as shown in fig. 6 and 7, the second guide vane 3 comprises a plurality of guide vane segments arranged at intervals around the central axis, each guide vane segment being of an arcuate configuration extending around the central axis. The structure is convenient to install.

As shown in fig. 3 and 4, in an embodiment of the utility model, the fairing further comprises a connection member 5 for connecting the plurality of first vanes 2, the vane members being located between the connection member 5 and the mounting member 1.

Through the arrangement, on one hand, the connecting member 5 can connect the end parts of the plurality of first guide vanes 2, so that the strength of the guide vane structure is improved, the stability of the guide vane structure in the air guiding process is improved, and the pneumatic noise is reduced; on the other hand, the connecting member 5 can also play a role in transitional buffer on the airflow, so that an unstable vortex structure in the air inlet and outlet area can be restrained to a certain extent, and vortex noise generated by high-speed rotation of the fan can be reduced.

In particular, in the embodiment of the utility model, the connecting member 5 is of the same structure as the second guide vane 3, preferably an annular structure arranged around the central axis, but may of course also consist of a plurality of arc-shaped structures extending around the central axis.

As shown in fig. 3 and 7, in the embodiment of the present utility model, at least part of the first guide vanes 2 of the plurality of first guide vanes 2 are disposed at uniform intervals around the central axis. Thus, the air inlet and outlet can be more uniform, so that the aerodynamic noise is reduced.

In one embodiment, the first guide vanes 2 may also be arranged at unequal intervals around the central axis.

It should be noted that, in the embodiment of the present utility model, the arrangement forms of the second guide vane 3 and the first guide vane 2 may be adjusted, so as to change the grid hole sizes in different directions, so as to adjust the air volume around the fan according to the actual situation, and realize reasonable distribution of the air volume.

As shown in fig. 7, in the embodiment of the present utility model, the first guide vane 2 extends along the central axis, and the first guide vane 2 has an arc structure protruding toward the side of the central axis. Therefore, the transition buffer effect on the air flow can be improved, so that the speed gradient of the air flow at the air inlet and the air outlet can be effectively slowed down, and the pneumatic noise generated by the rotation of the fan is reduced.

In an embodiment, the first guide vane 2 may also be of rectangular or trapezoidal configuration or the like.

As shown in fig. 1, an embodiment of the present utility model provides a heat dissipation fan, which includes a fan body 6 and the above-mentioned fairing connected to the fan body 6.

Specifically, in the embodiment of the present utility model, the mounting member 1 is provided with a mounting hole, and the fan body 6 includes a fan frame and fan blades located in the fan frame, and the fastening screw passes through the mounting hole to be connected with the fan frame, so as to assemble the mounting member 1 and the fan frame together.

Preferably, in the embodiment of the present utility model, the mounting member 1 is mounted at the air inlet of the fan body 6.

The heat dissipation fan has all advantages of the fairing, and is not described herein.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: for the air intake or the air outlet department of the fan among the prior art sets up straight section of thick bamboo ring structure or horn mouth kuppe, in this embodiment, install the mounting member in air intake or air outlet department of fan, the internal diameter of the stator structure of radome increases gradually from the direction of keeping away from air outlet or air intake, and a plurality of first stator can play the effect of transition buffering to the air current to slow down the velocity gradient of air current of air inlet and outlet, and can restrain the unstable vortex structure in access region to a certain extent, in order to reduce the vortex noise that the fan high-speed rotation produced, thereby reduce the rotatory pneumatic noise that produces of fan.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A fairing, the fairing having a cylindrical configuration with an air duct, the fairing comprising:

a mounting member (1);

the guide vane member is connected to the mounting member (1), the guide vane member comprises a plurality of first guide vanes (2) which are arranged at intervals along the circumferential direction of the air guide channel, and the distance between the first guide vanes (2) and the central axis gradually increases along the central axis of the cylindrical structure from the mounting member (1) to the guide vane member.

2. The fairing according to claim 1, wherein the vane member further comprises a plurality of second vanes (3) arranged at intervals along the central axis, the first vanes (2) and the second vanes (3) being arranged crosswise to form a plurality of grid holes.

3. A fairing according to claim 2, wherein the second guide vane (3) is connected to the first guide vane (2), the inner diameters of a plurality of the second guide vanes (3) increasing in sequence from the mounting member (1) to the guide vane member.

4. A fairing according to claim 2, wherein a plurality of said second vanes (3) are arranged at regular or non-regular intervals along said central axis.

5. A fairing according to claim 2, wherein the second vane (3) is of annular configuration arranged around the centre axis.

6. The fairing as recited in claim 2, wherein said second vane (3) comprises a plurality of vane segments disposed in spaced relation about said central axis, each of said vane segments being of arcuate configuration extending about said central axis.

7. A fairing according to claim 2, further comprising a connection member (5) for connecting a plurality of the first vanes (2), the vane member being located between the connection member (5) and the mounting member (1).

8. The fairing according to any one of claims 1 to 7, wherein at least some of the first vanes (2) of the plurality of first vanes (2) are evenly spaced about the central axis.

9. The fairing according to any one of claims 1 to 7, wherein the first vane (2) extends along the central axis, the first vane (2) being of an arcuate configuration protruding towards the side of the central axis; or,

the first guide vane (2) is of a rectangular structure or a trapezoid structure.

10. A cooling fan, characterized by comprising a fan body (6) and a fairing according to any of claims 1 to 9 connected to the fan body (6).