CN220769770U - Improved cross-flow fan blade middle section - Google Patents
Improved cross-flow fan blade middle section Download PDFInfo
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- CN220769770U CN220769770U CN202322617516.8U CN202322617516U CN220769770U CN 220769770 U CN220769770 U CN 220769770U CN 202322617516 U CN202322617516 U CN 202322617516U CN 220769770 U CN220769770 U CN 220769770U
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- flow fan
- fan blade
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Abstract
The utility model discloses an improved cross-flow fan blade middle section, which comprises an annular middle plate and a plurality of blades, wherein each blade comprises a pressure surface; the blades are connected to one end face of the annular middle plate, the other end face of the annular middle plate is spliced with the middle section of the other cross-flow fan blade, and the pressure surface is positioned on the concave cambered surface of the blade; the end face of the blade positioned on the radial outer side of the annular middle plate is planar, the end face is flush with the periphery of the annular middle plate, and the distance D between the outer edge of the pressure surface and the circle center of the annular middle plate 1 Equal to the outer radius R of the annular middle plate 1 . The application solves the problems that the end face of the blade of the traditional cross-flow fan blade, which is positioned on the radial outer side of the annular middle plate, is arc-shaped, and the distance between the outer edge of the pressure surface and the circle center of the annular middle plateThe separation is smaller than the outer radius of the annular middle plate, so that the problem of poor working capacity of the whole cross-flow fan blade is caused.
Description
Technical Field
The utility model relates to the technical field of cross-flow fan blades, in particular to an improved middle section of a cross-flow fan blade.
Background
The conventional cross-flow fan blade middle section comprises an annular middle plate and a plurality of blades, the blades and the annular middle plate are integrally formed, the blades comprise a pressure surface and a suction surface, the pressure surface is positioned on a concave cambered surface of the blades, the suction surface is positioned on a convex cambered surface of the blades, the end surface of the blades, which is positioned on the radial outer side of the annular middle plate, is arc-shaped, the distance between the outer edge of the pressure surface of the blades and the circle center of the annular middle plate is smaller than the outer radius of the annular middle plate, the difference between the outer edge of the pressure surface of the blades and the circle center of the annular middle plate is 3mm, the working capacity of the whole cross-flow fan blade is poor, and the air quantity generated by rotation of the whole cross-flow fan blade is reduced.
Disclosure of Invention
Aiming at the defects, the utility model provides an improved through-flow fan blade middle section, and aims to solve the problems that the end face of the traditional through-flow fan blade, which is positioned on the radial outer side of a ring-shaped middle plate, is arc-shaped, and the distance between the outer edge of a pressure surface and the circle center of the ring-shaped middle plate is smaller than the outer radius of the ring-shaped middle plate, so that the acting capability of the whole through-flow fan blade is poor.
To achieve the purpose, the utility model adopts the following technical scheme:
an improved cross-flow fan blade middle section comprises an annular middle plate and a plurality of blades, wherein each blade comprises a pressure surface;
the blades are connected to one end face of the annular middle plate, the other end face of the annular middle plate is spliced with the middle section of the other cross-flow fan blade, and the pressure face is located on the concave cambered surface of the blade;
the end surface of the blade positioned on the radial outer side of the annular middle plate is planar, the end surface is flush with the periphery of the annular middle plate, and the distance D between the outer edge of the pressure surface and the circle center of the annular middle plate 1 Equal to the outer radius R of the annular middle plate 1 。
Preferably, a plurality of blades are uniformly distributed along the circumferential direction of the annular middle plate.
Preferably, the blade further comprises a suction surface, and the suction surface is located on a convex cambered surface of the blade.
Preferably, the distance D between the inner edge of the pressure surface and the center of the annular middle plate 2 Is larger than the inner radius R of the annular middle plate 2 。
Preferably, the width L of the end face is 0.3mm < L <1.0mm.
Preferably, the thickness H of the annular middle plate is more than or equal to 3mm and less than or equal to 5mm.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
in this scheme, through will the blade is located the radial outside of annular medium plate terminal surface designs into plane form, just the terminal surface with the periphery parallel and level of annular medium plate, the outward flange of pressure face with the distance between the centre of a circle of annular medium plate equals the outer radius of annular medium plate, with the same annular medium plate, compare in the tradition the outward flange of pressure face with the distance between the centre of a circle of annular medium plate is less than the outer radius of annular medium plate, the area of contact of pressure face and air increases for the pressure that the pressure face received reduces, can effectively release the acting capacity of whole cross-flow fan blade, thereby promotes the amount of wind that its rotation produced.
Drawings
FIG. 1 is a schematic view of a modified cross-flow fan blade middle section;
FIG. 2 is a top view of a middle section of an improved cross-flow fan blade;
FIG. 3 is an enlarged partial view of area A of FIG. 2;
1, an annular middle plate; 2. a blade; 21. the blades are positioned on the end face of the radial outer side of the annular middle plate; 22. a pressure surface; 23. a suction surface; d (D) 1 The distance between the outer edge of the pressure surface and the circle center O of the annular middle plate; d (D) 2 The distance between the inner edge of the pressure surface and the circle center O of the annular middle plate; r is R 1 The outer radius of the annular middle plate; r is R 2 The inner radius of the annular middle plate; l, the width of the end face of the blade positioned on the radial outer side of the annular middle plate; H. thickness of the annular middle plate.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
In the description of the present utility model, it should be understood that the terms "length," "middle," "upper," "lower," "left," "right," "top," "bottom," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "spliced," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
An improved cross-flow fan blade middle section comprises an annular middle plate 1 and a plurality of blades 2, wherein each blade 2 comprises a pressure surface 22;
the blades 2 are connected to one end face of the annular middle plate 1, the other end face of the annular middle plate 1 is spliced with the middle section of the other cross-flow fan blade, and the pressure face 22 is located on the concave arc face of the blade 2;
the end face 21 of the blade 2 positioned radially outside the annular middle plate 1 is planar, and the end face 21 is connected withThe outer periphery of the annular middle plate 1 is flush, and the distance D between the outer edge of the pressure surface 22 and the circle center O of the annular middle plate 1 1 Equal to the outer radius R of the annular middle plate 1 1 。
In the improved through-flow fan blade middle section, as shown in fig. 1-2, since the end face 21 of the blade 2 positioned on the radial outer side of the annular middle plate 1 is planar, and the end face 21 is flush with the outer periphery of the annular middle plate 1, the distance D between the outer edge of the pressure surface 22 and the circle center O of the annular middle plate 1 1 Equal to the outer radius R of the annular middle plate 1 1 For the same annular middle plate 1, compared with the distance D between the outer edge of the pressure surface 22 and the center O of the annular middle plate 1 1 Is smaller than the outer radius R of the annular middle plate 1 1 The contact area between the pressure surface 22 and the air is increased, so that the pressure borne by the pressure surface 22 is reduced, the acting capacity of the whole cross-flow fan blade can be effectively released, and the air quantity generated by rotation of the cross-flow fan blade is improved.
Preferably, a plurality of the blades 2 are uniformly distributed along the circumference of the annular middle plate 1. In this embodiment, as shown in fig. 2, since a plurality of the blades 2 are uniformly distributed along the circumferential direction of the annular middle plate 1, the air volume generated by the rotation of the through-flow fan blade is uniform.
Preferably, the blade 2 further comprises a suction surface 23, and the suction surface 23 is located on a convex cambered surface of the blade 2. In this embodiment, as shown in fig. 3, the suction surface 23 is a surface that receives suction force when air flows over the blade 2. The suction surface 23 is capable of influencing the flow of air over the blade 2.
Preferably, the distance D between the inner edge of the pressure surface 22 and the center O of the annular middle plate 1 2 Is larger than the inner radius R of the annular middle plate 1 2 . In the present embodiment, as shown in FIG. 2, the distance D between the inner edge of the pressure surface 22 and the center O of the annular middle plate 1 2 Is larger than the inner radius R of the annular middle plate 1 2 The annular middle plate 1 is guaranteed to have a protection effect on the blades 2 to a certain extent.
Preferably, the width L of the end face 21 is 0.3mm < L <1.0mm. In this embodiment, as shown in fig. 3, the larger the width of the end face 21, the larger the airflow impact generated by the rotation of the end face 21 on the fan blade, and the larger the aerodynamic noise caused, so that the width of the end face 21 is smaller than 1.0mm can control the degradation of the aerodynamic noise. The width of the end face 21 is larger than 0.3mm, and the strength of the fan blade can be effectively ensured.
Preferably, the thickness H of the annular middle plate 1 is more than or equal to 3mm and less than or equal to 5mm. In this embodiment, as shown in fig. 1, since the thickness H of the annular middle plate 1 is 3mm less than or equal to H less than or equal to 5mm, when the through-flow fan blade is impacted by an external force, it can be ensured that the annular middle plate 1 is not easily damaged by impact.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (6)
1. An improved cross-flow fan blade middle section is characterized in that: the device comprises an annular middle plate and a plurality of blades, wherein the blades comprise a pressure surface;
the blades are connected to one end face of the annular middle plate, the other end face of the annular middle plate is spliced with the middle section of the other cross-flow fan blade, and the pressure face is located on the concave cambered surface of the blade;
the end surface of the blade positioned on the radial outer side of the annular middle plate is planar, the end surface is flush with the periphery of the annular middle plate, and the distance D between the outer edge of the pressure surface and the circle center of the annular middle plate 1 Equal to the outer radius R of the annular middle plate 1 。
2. An improved cross-flow fan blade middle section according to claim 1, wherein: the blades are uniformly distributed along the circumferential direction of the annular middle plate.
3. An improved cross-flow fan blade middle section according to claim 1, wherein: the blade further comprises a suction surface, and the suction surface is positioned on the convex cambered surface of the blade.
4. An improved cross-flow fan blade middle section according to claim 1, wherein: the distance D between the inner edge of the pressure surface and the center of the annular middle plate 2 Is larger than the inner radius R of the annular middle plate 2 。
5. An improved cross-flow fan blade middle section according to claim 1, wherein: the width L of the end face is 0.3mm < L <1.0mm.
6. An improved cross-flow fan blade middle section according to claim 1, wherein: the thickness H of the annular middle plate is more than or equal to 3mm and less than or equal to 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322617516.8U CN220769770U (en) | 2023-09-25 | 2023-09-25 | Improved cross-flow fan blade middle section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322617516.8U CN220769770U (en) | 2023-09-25 | 2023-09-25 | Improved cross-flow fan blade middle section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220769770U true CN220769770U (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322617516.8U Active CN220769770U (en) | 2023-09-25 | 2023-09-25 | Improved cross-flow fan blade middle section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220769770U (en) |
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2023
- 2023-09-25 CN CN202322617516.8U patent/CN220769770U/en active Active
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