CN212868014U - Low-noise centrifugal fan blade - Google Patents
Low-noise centrifugal fan blade Download PDFInfo
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- CN212868014U CN212868014U CN202021824350.7U CN202021824350U CN212868014U CN 212868014 U CN212868014 U CN 212868014U CN 202021824350 U CN202021824350 U CN 202021824350U CN 212868014 U CN212868014 U CN 212868014U
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- blade body
- blade
- centrifugal fan
- wavy
- low noise
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Abstract
The utility model relates to a ventilation equipment's technical field specifically is a low noise centrifugal fan blade. It includes: the method comprises the following steps: the blade body and install the lobe of blade body left and right sides, the upside of blade body be provided with blade body integrated into one piece's first wavy limit, first wavy limit is connected gradually by a plurality of teeth and is formed, the downside of blade body be provided with blade body integrated into one piece's second wavy limit or be the linear setting. The utility model discloses can reduce the noise that centrifugal fan produced.
Description
Technical Field
The utility model relates to a ventilation equipment's technical field specifically is a low noise centrifugal fan blade.
Background
The centrifugal fan is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine, wherein a blade is one of important parts of the centrifugal fan. The centrifugal fan has the characteristics of large flow, high pressure and low noise, and is widely applied to central air conditioners, rail transit vehicle-mounted air conditioners and kitchen smoke exhaust systems. Especially in demanding places of use, such as rail transit vehicle air conditioners, the demand for air conditioner size is getting smaller, but the required air volume and pressure are getting higher, and the noise of the centrifugal fan is also required to be as low as possible. Therefore, reducing the noise of the centrifugal fan is one of the main problems to be solved at present.
However, the rotating speed of the fan impeller of the traditional centrifugal fan is difficult to further reduce, and the diameter of the impeller is difficult to further increase, so how to reduce the noise of the centrifugal fan by changing the structure of the blades is a problem which needs to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low noise centrifugal fan blade aims at solving and leaves the big technical problem of wind-powered electricity generation machine noise among the prior art.
In order to achieve the above object, the utility model provides a low noise centrifugal fan blade, include: the blade body and install the lobe of blade body left and right sides, the upside of blade body be provided with blade body integrated into one piece's first wavy limit, first wavy limit is connected gradually by a plurality of teeth and is formed, the downside of blade body be provided with blade body integrated into one piece's second wavy limit or be the linear setting.
Preferably, the first wavy edge and the second wavy edge are symmetrically arranged.
Preferably, the vertical section of the blade body is an outwardly convex arch.
Preferably, the tooth tip of the tooth is arc-shaped.
Preferably, semicircular grooves are formed in the joints of the blade body and the blade ears.
The utility model relates to a low noise centrifugal fan blade has following beneficial effect:
1. the utility model discloses a set up the upside into first wavy limit, first wavy limit comprises a plurality of tooth simultaneously, and tooth can be to cutting air for the air resistance is little, has improved the rotatory efficiency of blade to a certain extent, simultaneously, after tooth cutting air, the air just can not be in front and back formation turbulent boundary layer, and there can not be the vortex in front and the back, makes the blade have noise reduction effect good to centrifugal fan. Meanwhile, because of the existence of the teeth, the centrifugal motor has less working power, thereby achieving the effect of energy conservation;
2. the utility model discloses a make the blade have better noise reduction, play the maximize of making an uproar, set up first wavy limit and second wavy limit symmetry, and then reach the air inlet and slow down the dual effect that the air current strikes simultaneously with the air-out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a front view of embodiment 1 of the present invention;
fig. 2 is a side view of embodiment 1 of the present invention;
fig. 3 is a front view of embodiment 2 of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
10 | |
| 11 | |
2 | |
| 21 | |
3 | |
| 4 | |
41 | Semi-circular groove |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1: as shown in fig. 1 to 2, includes: the vane body 1, in this embodiment, the vane body 1 has an upper side 10, a lower side 11, a front side and a back side, and the front side is an arc surface that is concave inwards. Moreover, the blade body 1 is made of aluminum alloy, so that the blade has the characteristics of high strength, particularly fatigue resistance and the like. Simultaneously, all install leaf ear 4 in blade body 1 and the 2 looks vertically both sides of first wavy edge, in this embodiment, the quantity of leaf ear 4 is two and relative setting, through leaf ear 4, can connect the blade on centrifugal fan.
In this embodiment, be provided with first wavy edge 2 in the upside, first wavy edge 2 and blade body 1 integrated into one piece, moreover, first wavy edge 2 comprises a plurality of teeth 21 end to end in proper order to make a plurality of teeth 21 along the extending direction equipartition of upside on blade body 1, and the shape of tooth 21 is the arc form. With the upside as the design of imitative hump back whale lump, great buoyancy can be generated to the swirl that forms, and reduce frictional force, can effectively weaken the separation phenomenon of entering, export air current, thereby reduce the flow loss and promote the operating efficiency, in addition, can alleviate the weight of whole blade, the raw materials have been practiced thrift, in addition, tooth 21 can be to cutting air, make the air-lock little, the rotatory efficiency of blade has been improved to a certain extent, and simultaneously, after tooth 21 cuts air, the air just can not form the turbulent boundary layer at front and back, there is the vortex front and the back can not exist, make the blade have the noise reduction effect good to centrifugal fan. Meanwhile, because of the existence of the teeth 21, the centrifugal motor has less power, and further, the energy-saving effect can be achieved.
In addition, a second wavy edge 3 integrally formed with the blade body 1 is provided on the lower side 11, and the second wavy edge 3 and the first wavy edge 2 may be symmetrically or asymmetrically provided. In this embodiment, for making the blade have better noise reduction, play the maximize of making an uproar, set up first wavy limit 2 and 3 symmetries on second wavy limit, and then reach the dual effect that air inlet and air-out slowed down the air current simultaneously and assaulted.
Moreover, the vertical section of the blade body 1 is in an outward convex arch shape, so that the flow path of gas is met, meanwhile, the whole flow channel is filled with gas, the possibility of generating vortex is reduced, the centrifugal fan has higher efficiency, and the impact of air outlet on air flow is also slowed down.
In this embodiment, in order to reduce the vibration generated between the blade and the wind turbine, the semicircular groove 41 is formed at the joint of the blade lug 4 and the blade body 1, so that the possibility of resonance generated between the end ring of the wind turbine and the blade can be reduced, and the damping effect is achieved.
Example 2: the difference from embodiment 1 lies in the arrangement of the lower side 11 of the blade body, and in this embodiment, the lower side 11 is arranged linearly, so that the blade has a simple structure, is convenient to process, and reduces the processing cost.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. A low noise centrifugal fan blade comprising: blade body (1) and install leaf ear (4) of blade body (1) left and right sides, its characterized in that: upside (10) of blade body (1) be provided with blade body (1) integrated into one piece's first wavy limit (2), first wavy limit (2) are connected gradually by a plurality of tooth (21) and are formed, downside (11) of blade body (1) be provided with blade body (1) integrated into one piece's second wavy limit (3) or be the setting of linearity.
2. A low noise centrifugal fan blade according to claim 1, wherein: the first wavy edge (2) and the second wavy edge (3) are symmetrically arranged.
3. A low noise centrifugal fan blade according to claim 1, wherein: the vertical section of the blade body (1) is in an outwards convex arch shape.
4. A low noise centrifugal fan blade according to claim 1, wherein: the tooth tips of the teeth (21) are arc-shaped.
5. A low noise centrifugal fan blade according to claim 1, wherein: the blade is characterized in that semicircular grooves (41) are formed in the connection positions of the blade body (1) and the blade ears (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021824350.7U CN212868014U (en) | 2020-08-27 | 2020-08-27 | Low-noise centrifugal fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021824350.7U CN212868014U (en) | 2020-08-27 | 2020-08-27 | Low-noise centrifugal fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212868014U true CN212868014U (en) | 2021-04-02 |
Family
ID=75190606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021824350.7U Active CN212868014U (en) | 2020-08-27 | 2020-08-27 | Low-noise centrifugal fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212868014U (en) |
-
2020
- 2020-08-27 CN CN202021824350.7U patent/CN212868014U/en active Active
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