CN216430049U - Novel low-noise cross flow wind wheel - Google Patents
Novel low-noise cross flow wind wheel Download PDFInfo
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- CN216430049U CN216430049U CN202121025243.2U CN202121025243U CN216430049U CN 216430049 U CN216430049 U CN 216430049U CN 202121025243 U CN202121025243 U CN 202121025243U CN 216430049 U CN216430049 U CN 216430049U
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Abstract
The utility model relates to a novel low-noise cross-flow wind wheel, which comprises a shaft cover and an end cover which are oppositely arranged, and at least one middle-segment wind wheel between the shaft cover and the end cover, wherein the middle-segment wind wheel comprises a middle plate and a plurality of blades arranged along the circumferential direction of the middle plate, the blades are arranged in an inclined mode, and two inner and outer arcs of a pressure arc surface and a suction arc surface are arranged on two sides of the blades, so that vortexes in a plurality of blade flow passages are more smoothly transited, the vortex noise is reduced, the pressure pulsation is weakened, and the purpose of effectively reducing noise is achieved; meanwhile, the suction radius R2 of the suction cambered surface is not more than the pressure radius R1 of the pressure cambered surface, so that the air pressure of the pressure cambered surface can be increased, the resistance of the suction cambered surface is reduced, and the air volume of the cross-flow wind wheel is effectively increased; and, the pressure cambered surface and the suction cambered surface are arranged in different circle centers, so that the structural strength of the blade can be improved, the breakage rate of a product is reduced, and the service life is prolonged.
Description
Technical Field
The utility model relates to a novel low-noise cross flow wind wheel.
Background
The cross-flow wind wheel for the fan is generally formed by a plurality of middle sections through ultrasonic welding, the middle sections are formed by integrally molding a circular wheel disc and a plurality of blades, one end of each blade is connected with the back of the circular wheel disc into a whole, a plurality of blade mounting grooves are formed in the front of the circular wheel disc, and the number of the blade mounting grooves is the same as the number of the blades. During operation, a fan generates noise, the noise mainly includes pneumatic noise and mechanical noise, the former is a main noise source of the fan, and the reason for the pneumatic noise is generally: the noise generated by unstable airflow at the inlet of the fan, or the noise generated by separation and falling of airflow in the flow channel at the blade interface, or the noise generated by interaction of high-speed airflow and the volute tongue, and the like. Therefore, in order to reduce noise generated when the fan operates, further improvement is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel low-noise cross-flow wind wheel to overcome the defects in the prior art.
A novel low noise cross-flow wind wheel designed according to the purpose comprises a shaft cover and an end cover which are arranged oppositely, and at least one middle segment wind wheel between the shaft cover and the end cover, and is characterized in that: the middle-segment fan blade comprises a middle plate and a plurality of blades arranged along the circumferential direction of the middle plate, and the plurality of blades are straight blades or arc-shaped blades which are obliquely arranged respectively.
The blade is an arc-shaped blade which is obliquely arranged and consists of an inner arc and an outer arc, wherein the inner arc and the outer arc are respectively a pressure arc surface and a suction arc surface; wherein, the pressure cambered surface and the suction cambered surface are arranged in the same circle center or in different circle centers.
The pressure arc surface and the suction arc surface are arranged in different circle centers; wherein, the pressure radius of the pressure cambered surface is R1, and the suction radius of the suction cambered surface is R2; r2 is not less than R1.
R2 which is more than or equal to 8mm and R1 which is more than or equal to 11 mm.
The chord length of the common tangent line of the inner end arc and the outer end arc of the blade is L1, and L1 is not less than 9mm and not more than 11 mm.
The chord length direction of the blades and the diameter direction of the middle plate form an inclination angle theta which is more than or equal to 26 degrees and less than or equal to 29 degrees.
The thickness of the inner end between the pressure arc surface and the suction arc surface is L2, and the thickness of the outer end between the pressure arc surface and the suction arc surface is L3; the L2 is less than L3, or L2 is equal to L3, or L2 is more than L3.
The inner end between the pressure arc surface and the suction arc surface is in angular transition or arc transition; the outer end between the pressure cambered surface and the suction cambered surface is in angular transition or arc transition.
The blades are arranged at equal intervals along the circumferential direction of the middle plate.
Through the improvement of the structure, the blades are arranged in an inclined mode, and two inner and outer sections of arcs, namely the pressure arc surface and the suction arc surface, are arranged on two sides of the blades, so that the vortexes in the flow channels of the blades are more smoothly transited, the vortex noise is reduced, the pressure pulsation is weakened, and the purpose of effectively reducing noise is achieved; meanwhile, the suction radius R2 of the suction cambered surface is not more than the pressure radius R1 of the pressure cambered surface, so that the air pressure of the pressure cambered surface can be increased, the resistance of the suction cambered surface is reduced, and the air volume of the cross-flow wind wheel is effectively increased; and, the pressure cambered surface and the suction cambered surface are arranged in different circle centers, so that the structural strength of the blade can be improved, the breakage rate of a product is reduced, and the service life is prolonged.
Comprehensively, it has simple structure reasonable, low in manufacturing cost, long service life, and output amount of wind is big, characteristics such as work efficiency height and noise are low, and the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
The utility model is further described with reference to the following figures and examples.
Referring to fig. 1 and 2, the novel low-noise cross-flow wind wheel comprises a shaft cover and an end cover which are arranged oppositely, and at least one middle-segment wind wheel between the shaft cover and the end cover, wherein the middle-segment wind wheel comprises a middle plate 1 and a plurality of blades 2 which are circumferentially arranged along the middle plate 1, and the plurality of blades 2 are respectively straight-line-shaped blades or arc-shaped blades which are obliquely arranged.
Specifically, the blade 2 of the present embodiment is an arc-shaped blade that is arranged in an inclined manner, and is composed of an inner arc and an outer arc, where the inner arc and the outer arc are respectively a pressure arc 11 and a suction arc 12, that is, the pressure arc 11 is located on the inner side, and the suction arc 12 is located on the outer side; wherein, the pressure cambered surface 11 and the suction cambered surface 12 are arranged in the same circle center or in different circle centers.
Furthermore, the pressure cambered surface 11 and the suction cambered surface 12 are arranged at different circle centers, and the arrangement of the different circle centers of the pressure cambered surface and the suction cambered surface can improve the structural strength of the blade, so that the damage rate of the cross-flow wind wheel is reduced, and the service life is prolonged.
The pressure radius of the pressure cambered surface 11 is R1, and the suction radius of the suction cambered surface 12 is R2; r2 is not more than R1, and the air pressure of the pressure cambered surface 11 can be increased and the resistance of the suction cambered surface 12 can be reduced by utilizing the radius size difference of the R2 and the R1, so that the air volume of the cross-flow wind wheel is effectively increased.
Specifically, the size relationship between R1 and R2 is 8mm ≦ R2 ≦ R1 ≦ 11 mm.
The chord length of the common tangent line of the inner and outer end arcs of the blade 2 is L1, L1 is more than or equal to 9mm and less than or equal to 11 mm.
The chord length direction of the blade 2 and the diameter direction of the middle plate 1 form an inclination angle theta which is more than or equal to 26 degrees and less than or equal to 29 degrees.
The thickness of the inner end between the pressure cambered surface 11 and the suction cambered surface 12 is L2, and the thickness of the outer end between the pressure cambered surface 11 and the suction cambered surface 12 is L3; the L2 is less than L3, or L2 is equal to L3, or L2 is more than L3.
The inner end between the pressure cambered surface 11 and the suction cambered surface 12 is in angular transition or arc transition; the outer end between the pressure cambered surface 11 and the suction cambered surface 12 is in angular transition or arc transition.
In this embodiment, the preferable L2 is L3, and the inner end and the outer end between the pressure arc surface 11 and the suction arc surface 12 are both in arc transition, so that the air flows more smoothly in the flow channels of the plurality of blades 2, and the vortex noise is reduced.
A plurality of blade 2 is arranged along 1 circumference equidistance of medium plate respectively, and the cooperation inclined pressure cambered surface 11 and suction cambered surface 12 can make the more smooth transition of the vortex in the 2 runners of a plurality of blade, further reduces the vortex noise to weaken pressure pulsation, play the purpose of effectively making an uproar.
The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the utility model are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but various changes and modifications may be made without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a novel low noise cross-flow wind wheel, includes the axle cover and the end cover of relative setting to and the at least one middle-segment fan blade between axle cover and the end cover, its characterized in that: the middle-segment fan comprises a middle plate (1) and a plurality of blades (2) arranged along the circumferential direction of the middle plate (1), wherein the plurality of blades (2) are straight-line blades or arc-shaped blades which are arranged in an inclined mode respectively;
the blade (2) is an arc-shaped blade which is arranged in an inclined mode and consists of an inner arc and an outer arc, wherein the inner arc and the outer arc are respectively a pressure arc surface (11) and a suction arc surface (12); wherein, the pressure cambered surface (11) and the suction cambered surface (12) are arranged in the same circle center or in different circle centers.
2. The novel low-noise cross-flow wind wheel of claim 1, characterized in that: the pressure cambered surface (11) and the suction cambered surface (12) are arranged in different circle centers; wherein the pressure radius of the pressure cambered surface (11) is R1, and the suction radius of the suction cambered surface (12) is R2; r2 is not less than R1.
3. The novel low-noise cross-flow wind wheel of claim 2, characterized in that: r2 is more than or equal to 8mm, R2 is more than or equal to R1 is less than or equal to 11 mm.
4. The novel low-noise cross-flow wind wheel of claim 1, characterized in that: the chord length of the common tangent line of the inner end arc and the outer end arc of the blade (2) is L1, and L1 is more than or equal to 9mm and less than or equal to 11 mm.
5. The novel low-noise cross-flow wind wheel of claim 4, characterized in that: the chord length direction of the blades (2) and the diameter direction of the middle plate (1) form an inclination angle theta which is more than or equal to 26 degrees and less than or equal to 29 degrees.
6. The novel low-noise cross-flow wind wheel of claim 1, characterized in that: the thickness of the inner end between the pressure cambered surface (11) and the suction cambered surface (12) is L2, and the thickness of the outer end between the pressure cambered surface (11) and the suction cambered surface (12) is L3; the L2 is less than L3, or L2 is equal to L3, or L2 is more than L3.
7. The novel low-noise cross-flow wind wheel of claim 1, characterized in that: the inner end between the pressure cambered surface (11) and the suction cambered surface (12) is in angular transition or arc transition; the outer end between the pressure cambered surface (11) and the suction cambered surface (12) is in angular transition or arc transition.
8. The novel low-noise cross-flow wind wheel according to any one of claims 1 to 7, characterized in that: the blades (2) are arranged at equal intervals along the circumferential direction of the middle plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121025243.2U CN216430049U (en) | 2021-05-13 | 2021-05-13 | Novel low-noise cross flow wind wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121025243.2U CN216430049U (en) | 2021-05-13 | 2021-05-13 | Novel low-noise cross flow wind wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216430049U true CN216430049U (en) | 2022-05-03 |
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ID=81316430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121025243.2U Active CN216430049U (en) | 2021-05-13 | 2021-05-13 | Novel low-noise cross flow wind wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216430049U (en) |
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2021
- 2021-05-13 CN CN202121025243.2U patent/CN216430049U/en active Active
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