CN212690450U - Take fan of making an uproar that falls of sawtooth - Google Patents
Take fan of making an uproar that falls of sawtooth Download PDFInfo
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- CN212690450U CN212690450U CN202020704964.5U CN202020704964U CN212690450U CN 212690450 U CN212690450 U CN 212690450U CN 202020704964 U CN202020704964 U CN 202020704964U CN 212690450 U CN212690450 U CN 212690450U
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- sawtooth
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Abstract
The utility model discloses a take fan of making an uproar that falls of sawtooth, including fan wheel hub (1), fan inserts (2), characterized by: the fan insert is provided with a mounting hole (3), the fan insert is embedded into a fan hub, a plurality of fan blades (4) are distributed around the hub at intervals, and the tail ends of the fan blades are provided with sawtooth-shaped structures (7). The arc-shaped surface of the sawtooth form structure (7) is provided with more dense wave grains (7-1). The fan blade is characterized in that a plurality of protruding ribs (5) are arranged on the windward side and the leeward side of the fan blade at intervals, the direction of the protruding ribs is perpendicular to the surface of the fan blade, the inner ends of the fan blade are fixedly connected with the hub, and the outer ends of the fan blade are connected with an annular wind protection ring (6). The number of the fan blades can be seven or more. The outer side of the wind protection ring is provided with a circle of raised outwards-turned circular ring (8).
Description
Technical Field
The utility model relates to a fan for the vehicle especially relates to a take fan of making an uproar that falls of sawtooth.
Background
As is well known, automobiles are increasingly popularized, and the driving comfort is more concerned, no matter traditional automobiles or new energy automobiles inevitably use fans to cool the whole automobile system, a large amount of noise is always generated when the fans operate, and the driving comfort is seriously affected by overlarge noise.
Most of the existing fan products in the market are ring-free fans, and part of the products reduce the fan running noise by reducing the height of a fan hub, but the generation of the fan noise is not fundamentally solved, so the effect is still not ideal; the prior art in addition adopts and reduces fan wheel hub and comes the noise abatement, must require great air volume to reach the cooling effect when because partial vehicle matches, and the increase of noise must be brought in the air volume increase, and this type of fan often the diameter is great, will greatly reduced the bulk strength of fan when reducing wheel hub this moment, will appear the risk of fracture or decomposition.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough and provide one kind and cut apart the air current through the mode that sets up protruding muscle and sawtooth limit at the flabellum, not only increased fan intensity and still realized falling the fan of making an uproar that falls of a take sawtooth of purpose of making an uproar.
The specific technical scheme is as follows: the utility model provides a take fan of making an uproar that falls of sawtooth, includes fan wheel hub, fan inserts, is equipped with the mounting hole on the fan inserts, and the fan inserts embedding is in fan wheel hub, and multi-disc flabellum interval distribution is around wheel hub, the flabellum end be provided with sawtooth configuration structure.
The arc-shaped surface of the sawtooth shape structure is provided with more dense wavy grains.
The fan blade is characterized in that a plurality of protruding ribs are arranged on the windward side and the leeward side of the fan blade at intervals, the direction of the protruding ribs is perpendicular to the surface of the fan blade, the inner end of the fan blade is fixedly connected with the hub, and the outer end of the fan blade is connected with an annular wind protection ring.
The number of the fan blades can be seven or more.
The outer side of the wind protection ring is provided with a circle of raised outwards-turned circular ring.
The research shows that the fan mainly has the air flow separation, tail nest falling, blade tip nest and the like of fan blades from the noise source; the first noise source of the radiator fan is distributed on the suction surface of the front edge of the blade, and flow separation and reattachment occur at the position; the second source of noise is noise near the trailing edge of the blade due to the shedding of the tip pocket and the tail pocket of the blade.
In nature, the feather of birds well solves the problem of providing power and reducing air friction resistance in flight in the long-term natural selection and biological evolution process, which is mainly attributed to the special morphological structure of the feather surface. For example: the analysis proves that the streak structure among feathers on the body surface of the hawk and the sawtooth shape of the feather tip are the main reasons of low noise of flight. The stripe structure can change the flowing state of air on the surface layer of the feather, so that the air moves along the stripe direction to reduce the generation of turbulent gas, and further reduce vortex noise and pressure pulsation; the sawtooth form of feather point portion can cut apart the vortex of point portion, reduces the quantity of the big vortex of point portion, and then reduces aerodynamic noise.
Therefore, from the technical scheme of the utility model can see out: 1. the connection of the air protection ring and the fan blades can improve the overall strength of the fan, and the outer side of the air protection ring is provided with a circle of raised outward-turning circular ring which can reduce the gap between the fan and the fan cover and reduce the air outlet backflow while increasing the structural strength of the air protection ring; 2. because a plurality of convex ribs are arranged on the windward side and the leeward side of the fan blade, the integral strength of the fan blade can be increased and the deformation risk of the fan blade can be reduced on one hand, and on the other hand, the fan can divide wind into different channel regions to flow out when rotating, so that the generation of turbulent gas is reduced, the vortex noise and the pressure pulsation are reduced, and the structure is similar to bird feathers; 3. because flabellum air-out side is provided with the sawtooth form, can cut apart sharp portion vortex, reduces the quantity of the big vortex of sharp portion, and then reduces aerodynamic noise, and the air current can further be cut apart to the wave structure of further distributing on the sawtooth form, promotes the noise reduction effect.
Through a plurality of tests, the technical scheme can reduce the noise by more than 50% under the conditions of normal wind speed and rotating speed, and the noise reduction effect is more obvious under the condition of high-speed wind speed. Therefore, the utility model discloses realized the invention purpose that has increased fan intensity and has fallen the noise completely.
Drawings
Fig. 1 is a schematic cross-sectional view of a noise reduction fan with saw teeth according to the present invention;
fig. 2 is a schematic top view of the noise reduction fan with saw teeth according to the present invention;
fig. 3 is a schematic perspective view of a noise reduction fan with saw teeth according to the present invention;
fig. 4 is a schematic view of a saw-tooth shape structure of a noise reduction fan with saw teeth according to the present invention.
Detailed Description
Embodiment 1, refer to fig. 1-3, a noise reduction fan with sawteeth includes a fan hub 1 and a fan insert 2, the fan insert is provided with a mounting hole 3, the fan insert is embedded in the fan hub, a plurality of blades 4 are distributed around the hub at intervals, and the tail ends of the blades are provided with sawteeth form structures 7.
The arc-shaped surface of the sawtooth-shaped structure 7 is provided with more dense wavy veins 7-1.
The windward side and the leeward side of the fan blade are provided with a plurality of protruding ribs 5 at intervals, the direction of the protruding ribs is perpendicular to the surface of the fan blade, the inner end of the fan blade is fixedly connected with the hub, and the outer end of the fan blade is connected with an annular wind protection ring 6.
The number of the fan blades can be seven or more.
And a circle of raised outwards-turned circular ring 8 is arranged on the outer side of the wind protection ring.
Claims (5)
1. The utility model provides a take fan of making an uproar that falls of sawtooth, includes fan wheel hub (1), fan inserts (2), characterized by: the fan insert is provided with a mounting hole (3), the fan insert is embedded into a fan hub, a plurality of fan blades (4) are distributed around the hub at intervals, and the tail ends of the fan blades are provided with sawtooth-shaped structures (7).
2. The noise reducing fan with serrations of claim 1, wherein: the arc-shaped surface of the sawtooth form structure (7) is provided with more dense wave grains (7-1).
3. The noise reducing fan with serrations of claim 1, wherein: the fan blade is characterized in that a plurality of protruding ribs (5) are arranged on the windward side and the leeward side of the fan blade at intervals, the direction of the protruding ribs is perpendicular to the surface of the fan blade, the inner ends of the fan blade are fixedly connected with the hub, and the outer ends of the fan blade are connected with an annular wind protection ring (6).
4. The noise reducing fan with serrations of claim 1, wherein: the number of the fan blades is seven.
5. The noise reducing fan with serrations of claim 3, wherein: the outer side of the wind protection ring is provided with a circle of raised outwards-turned circular ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020704964.5U CN212690450U (en) | 2020-04-30 | 2020-04-30 | Take fan of making an uproar that falls of sawtooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020704964.5U CN212690450U (en) | 2020-04-30 | 2020-04-30 | Take fan of making an uproar that falls of sawtooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212690450U true CN212690450U (en) | 2021-03-12 |
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ID=74886386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020704964.5U Active CN212690450U (en) | 2020-04-30 | 2020-04-30 | Take fan of making an uproar that falls of sawtooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212690450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202798A (en) * | 2021-05-31 | 2021-08-03 | 盐城动益汽车配件有限公司 | Noise reduction type engine cooling fan |
| CN114738319A (en) * | 2022-04-20 | 2022-07-12 | 浙江尚扬通风设备有限公司 | Low-noise axial flow fan and using method thereof |
-
2020
- 2020-04-30 CN CN202020704964.5U patent/CN212690450U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202798A (en) * | 2021-05-31 | 2021-08-03 | 盐城动益汽车配件有限公司 | Noise reduction type engine cooling fan |
| CN114738319A (en) * | 2022-04-20 | 2022-07-12 | 浙江尚扬通风设备有限公司 | Low-noise axial flow fan and using method thereof |
| CN114738319B (en) * | 2022-04-20 | 2023-11-14 | 浙江尚扬通风设备有限公司 | Low-noise axial flow fan and using method thereof |
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