CN220037036U - Blade, impeller, centrifugal fan and range hood of centrifugal fan - Google Patents
Blade, impeller, centrifugal fan and range hood of centrifugal fan Download PDFInfo
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- CN220037036U CN220037036U CN202223076180.0U CN202223076180U CN220037036U CN 220037036 U CN220037036 U CN 220037036U CN 202223076180 U CN202223076180 U CN 202223076180U CN 220037036 U CN220037036 U CN 220037036U
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- 239000000463 material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000010485 coping Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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Abstract
The utility model discloses a blade of a centrifugal fan, which comprises a main body part (1) and a tail edge part (2), wherein the main body part (1) is detachably connected with the tail edge part (2). Different tail edges are arranged according to the requirements, and the whole blade is not required to be replaced, so that the blades of the centrifugal fan can be conveniently used for coping with different fan working conditions; in addition, in the test process of optimizing the structural parameters of the tail edge, only different tail edge parts are required to be tested, and the test is carried out by installing the different tail edge parts, so that compared with the test of the whole blade, the utility model is beneficial to saving test materials and reducing test cost; in addition, because the tail edge part is small and the operation is more convenient, the scheme of replacing the tail edge part compared with the whole blade is favorable for reducing the workload and improving the test efficiency. The utility model also discloses an impeller of the centrifugal fan, the centrifugal fan and the range hood, and the utility model has the advantages of being convenient for coping with different fan working conditions and saving proofing materials.
Description
Technical Field
The utility model relates to the technical field of centrifugal fans, in particular to a blade of a centrifugal fan, an impeller, the centrifugal fan and a range hood.
Background
The centrifugal fan is a device for increasing the pressure of gas and discharging the gas by means of input mechanical energy. For example, a range hood discharges oil smoke through a centrifugal fan.
The blade of the centrifugal fan comprises a main body part and a tail edge part (namely a blade outlet edge), the shape and the angle of the tail edge part have direct influence on parameters such as air quantity, air pressure, noise and the like of the centrifugal fan, and the parameters respectively correspond to different working conditions of the centrifugal fan, for example, in recent years, the tail edge of the blade of the multi-wing centrifugal fan is designed into saw teeth, triangles, rectangles, bionic tooth shapes or sine waveforms, so that the contact surface of flowing air at the tail edge of the blade is enlarged to realize the split flow, thereby reducing the noise in operation, and the blade is disclosed in Chinese patent application No. CN201320779032.7 (the patent number is CN 203670271U), namely an impeller of the centrifugal fan, the impeller of the centrifugal fan comprises a front ring and a rear ring, a plurality of blades are fixed between the front ring and the rear ring, and the outlet end of the blade is formed into a wave-shaped saw tooth shape by a plurality of saw teeth. The wave-shaped saw-tooth structure is arranged at the outlet end (namely the tail edge) of the blade, so that the falling position of wake vortexes at the tail edge of the blade is changed, the distance between vortex cores is increased, disturbance of falling vortexes to wake flow is restrained, and further aerodynamic noise caused by unsteady pressure pulsation and wake vortexes on the surface of the blade is reduced. The height and the width of the saw teeth are limited, so that the noise is further reduced, and the influence of the saw teeth on the pressure and the air quantity of the fan can be reduced.
On the other hand, the optimization of the structural parameters of the tail edge of the blade needs to be optimized through a large number of tests for replacing the blade, and the results are that the blade proofing material consumption is large, the proofing cost is high, the workload of a replacement test scheme is huge, and the test optimization efficiency is low.
Disclosure of Invention
The first technical problem to be solved by the utility model is to provide a blade of a centrifugal fan which can be convenient for coping with different fan working conditions aiming at the current state of the art.
The second technical problem to be solved by the utility model is to provide a blade of a centrifugal fan capable of saving proofing materials.
The third technical problem to be solved by the utility model is to provide an impeller of a centrifugal fan.
The fourth technical problem to be solved by the utility model is to provide a centrifugal fan.
The fifth technical problem to be solved by the utility model is to provide a range hood.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: a blade of a centrifugal fan comprises a main body part and a tail edge part;
the method is characterized in that:
the main body part is detachably connected with the tail edge part.
One of the main body portion and the trailing edge portion has a mounting hole penetrating through the wall thickness thereof, and the other has a mounting portion substantially perpendicular to the extending direction of the mounting hole, and a rivet connected to the mounting portion and inserted into the mounting hole.
One of the main body part and the tail edge part is provided with a first bending part with a concave part, the other is provided with a second bending part, the second bending part is provided with a side edge, the side edge is inserted into the concave part of the first bending part, and the side edge and the inner wall of the concave part are connected in an interference fit or magnetic attraction mode.
In order to further cope with different fan working conditions, the tail edge part is at least partially made of bendable materials. Therefore, the position of the tail edge part relative to the main body part is changed through bending, and the position of the tail edge can be adjusted according to the requirement, so that different fan working conditions can be further dealt with.
The shape of the trailing edge portion may be varied, and it is preferable that the leading end of the trailing edge portion is wavy in order to reduce noise. Thus, noise reduction is facilitated.
The utility model adopts the technical proposal for solving the third technical problem that: an impeller of a centrifugal fan, applied with the blade of the centrifugal fan, characterized in that: comprising
A front ring;
a rear ring;
a middle ring positioned between the front ring and the rear ring;
the blades are arranged between the front ring and the rear ring and penetrate through the middle ring;
the tail edge part is at least two, is partially positioned between the front ring and the middle ring, and is partially positioned between the middle ring and the rear ring.
The utility model adopts the technical proposal for solving the fourth technical problem that: a centrifugal fan with blades of the centrifugal fan, characterized in that: the device comprises a volute, wherein the blades are arranged in the volute.
The technical scheme adopted by the utility model for solving the fifth technical problem is as follows: a range hood, characterized in that: the blade of the centrifugal fan is applied.
Compared with the prior art, the utility model has the advantages that: the main body part is detachably connected with the tail edge part, so that different tail edges are installed according to the needs, and the whole blade is not required to be replaced, thereby facilitating the handling of the blades of the centrifugal fan under different fan working conditions;
in addition, in the test process of optimizing the structural parameters of the tail edge, only different tail edge parts are required to be tested, and the test is carried out by installing the different tail edge parts, so that compared with the test of the whole blade, the utility model is beneficial to saving test materials and reducing test cost; in addition, because the tail edge part is small and the operation is more convenient, the scheme of replacing the tail edge part compared with the whole blade is favorable for reducing the workload and improving the test efficiency.
Drawings
FIG. 1 is a perspective view of a centrifugal fan to which a blade of the centrifugal fan embodying one embodiment of the present utility model is applied;
FIG. 2 is a schematic perspective view of an impeller incorporating the blades of a centrifugal fan embodying one embodiment of the present utility model;
fig. 3 is a schematic perspective view of a blade of a centrifugal fan according to a first embodiment of the present utility model;
FIG. 4 is a partially exploded view of the blade of FIG. 3;
FIG. 5 is an enlarged schematic view of portion A of FIG. 4;
FIG. 6 is a perspective view of a centrifugal fan to which blades of the centrifugal fan according to the second embodiment of the utility model are applied;
fig. 7 is a schematic perspective view of a blade of a centrifugal fan according to a second embodiment of the utility model;
FIG. 8 is a partially exploded view of the blade of FIG. 7;
FIG. 9 is a cross-sectional view taken along the direction B-B of FIG. 7;
fig. 10 is an exploded view of fig. 9.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
Example 1
Referring to fig. 1-5, a preferred embodiment of a blade of a centrifugal fan according to the present utility model is shown. The blade of the centrifugal fan comprises a main body part 1 and a tail edge part 2.
The main body part 1 and the tail edge part 2 are detachably connected. Specifically, the main body 1 has a mounting hole 11 penetrating the wall thickness thereof, and the trailing edge 2 has a mounting portion 23 substantially perpendicular to the extending direction of the mounting hole 11, and a rivet 21 connected to the mounting portion 23 and inserted into the mounting hole 11. In other embodiments, the mounting hole 11 may be provided in the trailing edge portion 2, while the mounting portion 23 and the rivet 21 are provided in the main body portion 1. The tip of the trailing edge 2 is wavy, and the tip of the trailing edge 2 may be provided in other shapes, for example, in a zigzag, triangular, rectangular shape, or the like, as required.
The utility model also provides an impeller of the centrifugal fan, which is provided with the blades of the centrifugal fan and comprises a front ring 200, a rear ring 300 and a middle ring 400, wherein the middle ring 400 is positioned between the front ring 200 and the rear ring 300. The vane is disposed between the front ring 200 and the rear ring 300 and penetrates the middle ring 400. Each blade has two trailing edge portions 2, partially between the front and middle turns 200, 400 and partially between the middle and rear turns 400, 300. In other embodiments, more than two trailing edge portions 2 may be provided per blade, and the number of trailing edge portions 2 per blade may be adjusted as desired.
The utility model also provides a centrifugal fan with the blades of the centrifugal fan, which comprises a volute 100, wherein the blades are arranged in the volute 100.
The utility model also provides a range hood, which is provided with the blades of the centrifugal fan.
The working principle of the utility model is as follows.
According to different fan working conditions, the corresponding tail edge part 2 is selected and installed, specifically, the tail edge part 2 before being detached is replaced by a new tail edge part 2.
In addition, in the test process of optimizing the structural parameters of the tail edge, only different tail edge parts 2 are required to be tested, and the test is carried out by installing the different tail edge parts 2, so that compared with the test of the whole blade, the utility model is beneficial to saving test materials and reducing test cost; in addition, because the tail edge part 2 is small in size and convenient to operate, compared with the scheme of replacing the whole blade, the tail edge part 2 is replaced, the workload is reduced, and the test efficiency is improved.
Example 2
The difference from the blade of the centrifugal fan in example 1 is that: the main body portion is different from the detachable connection structure of the trailing edge portion 2. The main body 1 has a first bending portion 12 formed with a concave portion 121, the tail edge 2 has a second bending portion 22, the second bending portion 22 has a side 221, the side 221 is inserted into the concave portion 121 of the first bending portion 12, and the side 221 and an inner wall of the concave portion 121 are connected by interference fit or magnetic attraction. The structures of the first bending portion 12 and the second bending portion 22 may also be interchanged. The tail edge 2 is made of bendable materials locally, for example, the tail edge 2 is bendable at a position adjacent to the main body 1, so that the installation angle of the tail edge 2 relative to the main body 1 can be adjusted to change the working condition of the fan.
Claims (6)
1. A blade of a centrifugal fan comprises a main body part (1) and a tail edge part (2);
the method is characterized in that:
the main body part (1) is detachably connected with the tail edge part (2);
one of the main body part (1) and the tail edge part (2) is provided with a mounting hole (11) penetrating through the wall thickness of the main body part, the other is provided with a mounting part (23) basically vertical to the extending direction of the mounting hole (11), and a rivet (21) connected with the mounting part (23) and inserted into the mounting hole (11);
alternatively, one of the main body part (1) and the tail edge part (2) is provided with a first bending part (12) with a concave part (121), the other is provided with a second bending part (22), the second bending part (22) is provided with a side edge (221), the side edge (221) is inserted into the concave part (121) of the first bending part (12), and the side edge (221) and the inner wall of the concave part (121) are connected in an interference fit or magnetic attraction mode.
2. The blade of a centrifugal fan according to claim 1, wherein: the tail edge part (2) is at least partially made of bendable materials.
3. The blade of a centrifugal fan according to claim 1 or 2, wherein: the front end of the tail edge part (2) is wavy.
4. An impeller of a centrifugal fan, to which the blade of the centrifugal fan according to any one of claims 1 to 3 is applied, characterized in that: comprising
A front ring (200);
a rear ring (300);
a middle ring (400) positioned between the front ring (200) and the rear ring (300);
the blades are arranged between the front ring (200) and the rear ring (300) and penetrate through the middle ring (400);
the tail edge part (2) is at least two, is partially positioned between the front ring (200) and the middle ring (400), and is partially positioned between the middle ring (400) and the rear ring (300).
5. A centrifugal fan to which a blade of a centrifugal fan according to any one of claims 1 to 3 is applied, characterized in that: comprises a volute (100), and the blades are arranged in the volute (100).
6. A range hood, characterized in that: a blade for a centrifugal fan according to any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223076180.0U CN220037036U (en) | 2022-11-18 | 2022-11-18 | Blade, impeller, centrifugal fan and range hood of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223076180.0U CN220037036U (en) | 2022-11-18 | 2022-11-18 | Blade, impeller, centrifugal fan and range hood of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220037036U true CN220037036U (en) | 2023-11-17 |
Family
ID=88723355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223076180.0U Active CN220037036U (en) | 2022-11-18 | 2022-11-18 | Blade, impeller, centrifugal fan and range hood of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220037036U (en) |
-
2022
- 2022-11-18 CN CN202223076180.0U patent/CN220037036U/en active Active
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