CN219159246U

CN219159246U - Fan blade and fan

Info

Publication number: CN219159246U
Application number: CN202320205217.0U
Authority: CN
Inventors: 段裘铭; 金晶
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-01-20
Filing date: 2023-01-20
Publication date: 2023-06-09
Anticipated expiration: 2033-01-20

Abstract

The utility model discloses a fan blade and a fan, wherein the fan blade comprises a blade body, the blade body is of a strip-shaped plate-shaped structure, the blade body is provided with a blade front end and a blade rear end, the edge of the blade body facing towards the windward side is provided with an arc-shaped extension part protruding outwards, the arc-shaped extension part is positioned at the rear end of the blade and corresponds to an air outlet of the fan, and the arc-shaped extension part is extended smoothly from the blade body towards the windward direction. The fan blade is provided with the arc-shaped extension part at the position of the rear end of the blade corresponding to the air outlet, the arc-shaped extension part is arranged in a smooth extending way from the blade body towards the windward direction, the acting area of the blade is increased, the acting efficiency of the fan blade is improved, wind smoothly flows through the fan blade, vortex shedding is not generated, and noise generated between the fan blade and the wind is reduced. The utility model also discloses a fan, which comprises the fan blade.

Description

Fan blade and fan

Technical Field

The utility model relates to a fan blade and a fan.

Background

Most of the existing gas water heaters adopt strong exhaust fans, and the fans are generally composed of a motor, an impeller and a volute. The air inlet and the air outlet of the fan are distributed on the volute, and the air inlet of the volute and the impeller are positioned concentrically in the assembled state of the fan. When the gas water heater works, the fan needs to operate at a high speed to blow air into the combustion chamber to be mixed with gas for combustion. Subsequently, when the fan runs at a high speed, because the impeller rotates at a high speed, vortex is generated when air passes through the fan, and the abrupt change of the pressure and the flow direction of the air causes noise to a certain extent, so that the use experience of the water heater is affected. The working efficiency of the fan is determined by the quality of the fan blade. The design method of the existing centrifugal impeller of the fan adopts a single straight blade or single circular arc flow design, the series design can cause too great performance change, and the fan adopting the impeller has low efficiency and can not meet the high-efficiency air outlet requirement.

Disclosure of Invention

The utility model aims to overcome the defects of low efficiency and high noise of a fan blade in the prior art and provides the fan blade and a fan.

The utility model solves the technical problems by the following technical scheme:

the utility model provides a fan blade, fan blade includes the blade body, the blade body is rectangular shaped plate column structure, the blade body has blade front end and blade rear end, the blade body has the arc extension of outwards protruding towards the edge of windward side, the arc extension is located the blade rear end and corresponds the air outlet setting of fan, the arc extension is followed the blade body is along smooth extension towards the direction of windward.

In the scheme, the arc-shaped extension part is arranged at the position, corresponding to the air outlet, of the rear end of the fan blade, and the arc-shaped extension part is arranged in a smooth extending manner from the blade body towards the windward direction, so that the acting area of the blade is increased, the acting efficiency of the fan blade is improved, wind smoothly flows through the fan blade, vortex shedding cannot be generated, and noise generated between the fan blade and the wind is reduced.

Preferably, the radial dimension of the arcuate extension increases gradually from the leading end of the blade to the trailing end of the blade.

In the scheme, the arc-shaped extension part is arranged at the position corresponding to the air outlet, wind enters from the air inlet, and the main part of the working of the fan blade is the part close to the rear end of the blade.

Preferably, the blade body is provided with a central axis and a first arc part, the first arc part is positioned on one side of the central axis facing towards the wind, the cross section of the first arc part is of an arc structure extending along the radial direction, and the arc extending part is connected with the edge of the first arc part.

In this scheme, adopt above-mentioned structural style, the blade body of being convenient for drives more wind, raises the efficiency.

Preferably, the blade body further has a second arc portion, the second arc portion is located on the leeward side of the central axis, the cross section of the second arc portion is of an arc-shaped structure extending along the radial direction, and the arc center of the first arc portion and the arc center of the second arc portion are located on the same side of the blade body.

In this scheme, adopt above-mentioned structural style, all be provided with convex structure in the both sides of central axis for wind is difficult for producing the vortex and drops when flowing through fan blade, and the blade body of being convenient for drives more wind, raises the efficiency.

Preferably, the radial dimension of the first arc part is larger than the radial dimension of the second arc part.

In this scheme, adopt above-mentioned structural style, the size of the first circular arc portion of windward side is greater than the size of leeward side for a large amount of wind from the air intake is driven to the air outlet by fan blade.

Preferably, the first arc part is provided with an arc chamfer at the corner position of the front end of the blade.

In this scheme, adopt above-mentioned structural style, the wind of being convenient for is smooth to flow through fan blade's bight, reduces blade vibration and noise.

Preferably, the two ends of the blade body are respectively provided with a clamping part, and the clamping parts are used for being clamped with the rim of the wind wheel.

In this scheme, adopt above-mentioned structural style, the dismouting blade of being convenient for improves assembly efficiency.

A fan comprising a fan blade as described above.

In the scheme, because the fan comprises the fan blade, the working area of the blade is increased, the working efficiency of the fan blade is improved, wind smoothly flows through the fan blade, vortex shedding is avoided, and noise generated between the fan blade and the wind is reduced.

Preferably, the fan comprises a wind wheel and a shell, the wind wheel comprises two rims and a plurality of fan blades, two ends of each fan blade are respectively connected with one rim in a clamping mode, the fan blades are evenly arranged at intervals along the circumferential direction of the rim, the wind wheel is installed in the shell, an air inlet is formed in the end face of the shell, and an air outlet is formed in the outer peripheral face of the shell.

In this scheme, adopt above-mentioned structural style for the simple structure of fan reduces the volume of fan, reduces installation space.

Preferably, the fan further comprises a motor, the motor is located at one side, far away from the air inlet, of the shell, and an output shaft of the motor penetrates through the shell to be connected with the wind wheel.

In this scheme, adopt above-mentioned structural style, reduce the volume of casing, also make the simple structure of fan, reduce the volume of fan, reduce installation space, also be convenient for motor drive wind wheel.

On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.

The utility model has the positive progress effects that: the fan blade is provided with the arc-shaped extension part at the position of the rear end of the blade corresponding to the air outlet, the arc-shaped extension part is arranged in a smooth extending way from the blade body towards the windward direction, the acting area of the blade is increased, the acting efficiency of the fan blade is improved, wind smoothly flows through the fan blade, vortex shedding is not generated, and noise generated between the fan blade and the wind is reduced.

Drawings

FIG. 1 is a schematic view of a front face of a fan blade according to a preferred embodiment of the present utility model.

FIG. 2 is a schematic view of the back side of a fan blade according to a preferred embodiment of the present utility model.

FIG. 3 is a top view of a fan blade according to a preferred embodiment of the present utility model.

Fig. 4 is a schematic structural diagram (a) of a fan according to a preferred embodiment of the present utility model.

Fig. 5 is a schematic structural diagram of a fan according to a preferred embodiment of the present utility model (ii).

Fig. 6 is a schematic structural diagram of a fan according to a preferred embodiment of the present utility model.

Reference numerals illustrate:

blade body 1

Arcuate extension 11

Central axis 12

First arc part 13

Second circular arc portion 14

Circular arc chamfer 15

Clamping part 16

Blade front end 101

Blade trailing end 102

Windward side 103

Leeward side 104

Air intake 105

Air outlet 106

Wind wheel 2

Casing 3

Electric motor 4

Radial direction 100

Detailed Description

The utility model will now be more fully described by way of example only and with reference to the accompanying drawings, but the utility model is not thereby limited to the scope of the examples described.

As shown in fig. 1-3, the embodiment discloses a fan blade, the fan blade includes a blade body 1, the blade body 1 is in a strip-shaped plate structure, the blade body 1 has a front blade end 101 and a rear blade end 102, the edge of the blade body 1 facing a windward side 103 is provided with an arc extension 11 protruding outwards, the arc extension 11 is located at the rear blade end 102 and corresponds to an air outlet 106 of the fan, and the arc extension 11 extends smoothly from the blade body 1 towards the windward direction.

In this embodiment, the fan blade is provided with the arc-shaped extension part 11 at the position of the rear end 102 of the blade corresponding to the air outlet 106, and the arc-shaped extension part 11 is arranged in a smooth extending manner from the blade body 1 towards the windward direction, so that the working area of the blade is increased, the working efficiency of the fan blade is improved, the wind smoothly flows through the fan blade, vortex shedding is avoided, and the noise generated between the fan blade and the wind is reduced.

As shown in fig. 1 and fig. 4, since the arc-shaped extension 11 is disposed at a position corresponding to the air outlet 106, wind enters from the air inlet 105, the main part of the working of the fan blade is a part close to the rear end 102 of the blade, and the radial dimension of the arc-shaped extension 11 gradually increases from the front end 101 to the rear end 102 of the blade, so that the structure of the fan blade is simplified, and the economic benefit is improved.

As shown in fig. 1, the blade body 1 has a central axis 12 and a first arc portion 13, the first arc portion 13 is located on a windward side 103 of the central axis 12, a cross section of the first arc portion 13 is in a circular arc structure extending along a radial direction 100, and the arc extending portion 11 is connected to an edge of the first arc portion 13, so that the blade body 1 can conveniently drive more wind, and efficiency is improved. Further, the blade body 1 is further provided with a second arc portion 14, the second arc portion 14 is located on the leeward side 104 of the central axis 12, the cross section of the second arc portion 14 is of an arc-shaped structure extending along the radial direction 100, and the arc center of the first arc portion 13 and the arc center of the second arc portion 14 are located on the same side of the blade body 1, so that arc-shaped structures are arranged on two sides of the central axis 12, and when wind flows through the fan blade, vortex shedding is not easy to occur, the blade body 1 is convenient to drive more wind, and efficiency is improved.

On this basis, the radial dimension of the first circular arc portion 13 is larger than the radial dimension of the second circular arc portion 14, so that the dimension of the first circular arc portion 13 on the windward side 103 is larger than the dimension on the leeward side 104, and a large amount of wind from the air inlet 105 is driven to the air outlet 106 by the fan blade.

As shown in fig. 1 and 2, the corner of the first arc 13 at the front end 101 of the blade is provided with an arc chamfer 15, which facilitates smooth flow of wind over the corners of the fan blade and reduces blade vibration and noise.

As shown in fig. 1 and 3, two ends of the blade body 1 are respectively provided with a clamping part 16, and the clamping parts 16 are used for clamping with the rim of the wind wheel 2, so that the blade can be conveniently disassembled and assembled, and the assembly efficiency is improved.

As shown in fig. 4-6, the present embodiment also discloses a fan comprising the fan blade as described above. Because the fan comprises the fan blade, the working area of the blade is increased, the working efficiency of the fan blade is improved, wind smoothly flows through the fan blade, vortex shedding can not be generated, and noise generated between the fan blade and the wind is reduced. Wherein, the fan includes wind wheel 2 and casing 3, and wind wheel 2 includes two rims (not shown in the figure) and a plurality of fan blade, and a rim is connected in the both ends of fan blade block respectively, and a plurality of fan blade sets up along the even interval of the circumferencial direction of rim, and wind wheel 2 installs in the inside of casing 3, and the terminal surface of casing 3 is provided with air intake 105, and the outer peripheral surface of casing 3 is provided with air outlet 106 for the simple structure of fan reduces the volume of fan, reduces installation space.

As shown in fig. 4-6, the fan further comprises a motor 4, the motor 4 is located on one side, far away from the air inlet 105, of the housing 3, an output shaft of the motor 4 penetrates through the housing 3 to be connected to the wind wheel 2, the motor 4 is convenient to drive the wind wheel 2 to rotate, the size of the housing 3 is reduced, the structure of the fan is simple, the size of the fan is reduced, and the installation space is reduced.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims

1. The utility model provides a fan blade, its characterized in that, fan blade includes the blade body, the blade body is rectangular shaped plate column structure, the blade body has blade front end and blade rear end, the blade body has the arc extension of outwards protruding towards the edge of windward side, the arc extension is located the blade rear end and corresponds the air outlet setting of fan, the arc extension follow the blade body is along extending smoothly towards windward direction.

2. The fan blade of claim 1 wherein the radial dimension of the arcuate extension increases gradually from the blade forward end to the blade aft end.

3. The fan blade of claim 1, wherein the blade body has a central axis and a first circular arc portion, the first circular arc portion being located on a windward side of the central axis, a cross section of the first circular arc portion being of a circular arc structure extending in a radial direction, the arc extension being connected to an edge of the first circular arc portion.

4. The fan blade of claim 3, wherein the blade body further has a second circular arc portion, the second circular arc portion being located on a leeward side of the central axis, a cross section of the second circular arc portion being in a circular arc structure extending in a radial direction, and an arc center of the first circular arc portion and an arc center of the second circular arc portion being located on the same side of the blade body.

5. The fan blade of claim 4 wherein the radial dimension of the first arcuate portion is greater than the radial dimension of the second arcuate portion.

6. A fan blade according to claim 3, wherein the corner of the first circular arc at the front end of the blade is provided with a circular arc chamfer.

7. The fan blade of claim 1, wherein two ends of the blade body are respectively provided with a clamping part, and the clamping parts are used for clamping with a rim of the wind wheel.

8. A wind turbine comprising the wind turbine blade of any one of claims 1-7.

9. The fan as claimed in claim 8, wherein the fan comprises a wind wheel and a housing, the wind wheel comprises two rims and a plurality of fan blades, two ends of each fan blade are respectively connected with one rim in a clamping manner, the plurality of fan blades are uniformly arranged at intervals along the circumferential direction of the rim, the wind wheel is mounted in the housing, an air inlet is formed in the end face of the housing, and an air outlet is formed in the outer circumferential surface of the housing.

10. The blower of claim 9, further comprising a motor located on a side of the housing remote from the air inlet, an output shaft of the motor passing through the housing and being connected to the wind wheel.