Assembly type fan blade structure

By dividing the fan blades into three parts and performing extrusion and argon arc welding, the problems of difficult and high cost processing of large-size fan blades are solved, and a high-precision, low-cost and durable fan blade structure is achieved.

CN223482973UActive Publication Date: 2025-10-28SHANGHAI MATECH MASCH MFG CORP LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202423101579.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-10-28
Estimated Expiration
2034-12-16

Smart Images

  • Figure CN223482973U_ABST
    Figure CN223482973U_ABST
Patent Text Reader

Abstract

The utility model discloses an assembly type fan blade structure which comprises a fan blade front section, a fan blade middle section and a fan blade tail section. The section of the fan blade front section is A-shaped, and fan blade front section clamping hooks are arranged on the edges of the two sides of the fan blade front section; fan blade middle section front clamping grooves matched with the fan blade front section clamping hooks are formed in one ends of two side plates of the fan blade middle section, and fan blade middle section rear clamping hooks are arranged at the other ends of the two side plates of the fan blade middle section; the section of the fan blade tail section is in an A shape, fan blade tail section clamping grooves matched with the rear clamping hooks of the fan blade middle section are formed in the edges of the two sides of the fan blade tail section, a fan blade tail section tail plate is connected to the joint of the two side plates of the fan blade tail section, and the fan blade tail section tail plate and the two side plates of the fan blade tail section are in smooth transition. According to the assembly type fan blade structure, the whole fan blade is divided into three parts which are respectively formed in an extrusion mode, dependence on aluminum alloy extrusion equipment is reduced, and deformation is not prone to being generated; the product machining precision can be improved, the product yield is high, and the cost is low; welding reinforcement is conducted after splicing, the overall structural strength of the product is improved, and the application prospect is good.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of large-size fan blade technology, and to an assembled fan blade structure, particularly to an assembled large-size fan blade structure that is easy to process, has good structural strength, and low processing cost. Background Technology

[0002] Fan blades are the components of a fan that are driven by an electric motor to rotate and generate airflow. The size of the fan blades is related to the fan's efficiency. Larger fan blades provide a greater airflow volume and, compared to multiple conventional fan blades, offer better ventilation efficiency and consume less power. In industrial applications, to reduce the weight of large fan blades and improve fan efficiency, lightweight alloys—such as aluminum alloys—are often used to make the blades. Currently, aluminum alloy extrusion profiles are commonly used for fan blade processing. However, for large fan blades, existing 5000-ton / 7500-ton extrusion presses cannot extrude profiles with large cross-sectional widths and thin walls. This is because it is difficult to simultaneously meet the design requirements for wall thickness, strength, size, and shape. Forcing the extrusion of the blank also easily leads to deformation, resulting in extremely low product yield and very high costs.

[0003] Therefore, developing a large-size fan blade structure that is easy to process, has good structural strength, and is inexpensive to process is of great practical significance. Utility Model Content

[0004] Due to the aforementioned defects in the existing technology, this utility model provides an assembled large-size fan blade structure that is easy to process, has good structural strength, and low processing cost, in order to solve the problems of difficult processing, easy deformation, low product yield, and high cost of large-size fan blade structures.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An assembled fan blade structure includes a front section, a middle section, and a tail section of the fan blade assembled sequentially.

[0007] The front section of the fan blade has an A-shaped cross-section, and the front section of the fan blade is provided with snap hooks on both sides of its edge.

[0008] The cross-section of the middle section of the fan blade is H-shaped. One end of the two side plates of the middle section of the fan blade is provided with a front snap-fit ​​groove of the middle section of the fan blade that matches the snap-fit ​​hook of the front section of the fan blade, and the other end is provided with a rear snap-fit ​​hook of the middle section of the fan blade.

[0009] The cross-section of the tail section of the fan blade is A-shaped, and the two sides of the tail section are provided with fan blade tail section locking grooves that match the locking hooks of the middle section of the fan blade. The tail plate of the tail section is connected to the two side plates of the tail section of the fan blade, and the tail plate of the tail section of the fan blade is smoothly connected to the two side plates of the tail section of the fan blade.

[0010] The assembled fan blade structure of this utility model divides the fan blade into three parts, which are extruded separately. This greatly reduces the reliance on aluminum alloy extrusion equipment, makes it less prone to deformation, improves the processing accuracy of the product, results in a high product yield, and has a low overall cost. After the three parts are spliced ​​together, they are reinforced by argon arc welding, which improves the overall structural strength of the product, makes it durable, has a long service life, and has great application prospects.

[0011] As a preferred technical solution:

[0012] As described above, the assembled fan blade structure includes a fan blade front section with a ∧-shaped outer plate and a rounded transition. The fan blade front section outer plate is provided with a front reinforcing rib and a rear reinforcing rib connecting the two sides of the fan blade front section outer plate. The rear reinforcing rib is closer to the fan blade front section snap hook than the front reinforcing rib.

[0013] As described above, in a prefabricated fan blade structure, the middle section of the fan blade includes a fan blade middle section outer plate I and a fan blade middle section outer plate II arranged at intervals;

[0014] The outer plate I and the outer plate II of the middle section of the fan blade are connected by front reinforcing ribs, middle reinforcing ribs and rear reinforcing ribs of the middle section of the fan blade arranged in sequence at intervals. The outer plate I and the outer plate II of the middle section of the fan blade are arc-shaped plates. The length of the front reinforcing rib of the middle section of the fan blade is greater than the length of the middle reinforcing rib of the middle section of the fan blade, and the length of the middle reinforcing rib of the middle section of the fan blade is greater than the length of the rear reinforcing rib of the middle section of the fan blade.

[0015] In the assembled fan blade structure described above, the maximum distance between the outer plate I and the outer plate II of the middle section of the fan blade is located between the front reinforcing rib and the middle reinforcing rib of the middle section of the fan blade.

[0016] As described above, in an assembled fan blade structure, the fan blade tail section includes a fan blade tail section outer plate I and a fan blade tail section outer plate II;

[0017] One end of the outer plate I and the outer plate II of the blade tail section are connected, and the other end is connected by a blade tail section reinforcing rib arranged between the outer plate I and the outer plate II of the blade tail section. The outer plate I and the outer plate II of the blade tail section are provided with a blade tail section snap-fit ​​groove near the blade tail section reinforcing rib. The blade tail section tail plate is fixed at the connection between the outer plate I and the outer plate II of the blade tail section.

[0018] As described above, in an assembled fan blade structure, the tail plate of the fan blade tail section is bent to one side.

[0019] As described above, in an assembled fan blade structure, the front section snap hook of the fan blade is snapped into and welded to the front snap groove of the middle section of the fan blade to ensure the reliability of the connection.

[0020] The middle section of the fan blade is engaged with the tail section of the fan blade and welded to ensure the reliability of the connection.

[0021] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0022] Compared with the prior art, the above-mentioned utility model has the following advantages or beneficial effects:

[0023] (1) The assembled fan blade structure of this utility model divides the fan blade into three parts, and the three parts are extruded separately, which greatly reduces the dependence on aluminum alloy extrusion equipment and makes it less prone to deformation.

[0024] (2) The assembled fan blade structure of this utility model is divided into three parts that are extruded separately, which can improve the processing accuracy of the product, result in a high product yield, and reduce the overall cost.

[0025] (3) The assembled fan blade structure of this utility model is reinforced by argon arc welding after the three parts are spliced ​​together, which improves the overall structural strength of the product, has good durability, long service life, and great application prospects. Attached Figure Description

[0026] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0027] Figure 1 This is a schematic diagram of the assembled fan blade structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the front section of the fan blade;

[0029] Figure 3 This is a schematic diagram of the middle section of the fan blade;

[0030] Figure 4 This is a schematic diagram of the structure of the tail section of the fan blade;

[0031] Among them, 1 is the front section of the fan blade, 11 is the outer plate of the front section of the fan blade, 12 is the front reinforcing rib of the front section of the fan blade, 13 is the rear reinforcing rib of the front section of the fan blade, 14 is the snap hook of the front section of the fan blade, 2 is the middle section of the fan blade, 21 is the outer plate I of the middle section of the fan blade, 22 is the outer plate II of the middle section of the fan blade, 23 is the front reinforcing rib of the middle section of the fan blade, 24 is the middle reinforcing rib of the middle section of the fan blade, 25 is the rear reinforcing rib of the middle section of the fan blade, 26 is the front snap groove of the middle section of the fan blade, 27 is the rear snap hook of the middle section of the fan blade, 3 is the tail section of the fan blade, 31 is the outer plate I of the tail section of the fan blade, 32 is the outer plate II of the tail section of the fan blade, 33 is the reinforcing rib of the tail section of the fan blade, 34 is the snap groove of the tail section of the fan blade, and 35 is the tail plate of the tail section of the fan blade. Detailed Implementation

[0032] The structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the utility model.

[0033] Example 1

[0034] A type of assembled fan blade structure, such as Figure 1 As shown, it includes the front section 1, the middle section 2, and the tail section 3 of the fan blade, which are assembled in sequence.

[0035] The front section of the fan blade is as follows Figure 2 As shown, its cross-section is A-shaped, including a fan blade front section outer plate 11 arranged in a ∧ shape and the fan blade front section outer plate 11 is rounded. The fan blade front section outer plate 11 is provided with a fan blade front reinforcing rib 12 and a fan blade front section rear reinforcing rib 13 connecting the two sides of the fan blade front section outer plate 11. The fan blade front section snap hooks 14 are provided on both sides of the fan blade front section outer plate 11. The fan blade front section rear reinforcing rib 13 is closer to the fan blade front section snap hook 14 than the fan blade front section reinforcing rib 12.

[0036] middle section of the fan blade 2 Figure 3As shown, its cross-section is H-shaped, comprising fan blade mid-section outer plates I 21 and II 22 arranged at intervals. Fan blade mid-section outer plates I 21 and II 22 are connected by fan blade mid-section front reinforcing ribs 23, mid-section reinforcing ribs 24, and rear-section reinforcing ribs 25 arranged at intervals. Fan blade mid-section outer plates I 21 and II 22 are arc-shaped plates. The maximum spacing between fan blade mid-section outer plates I 21 and II 22 is located between the fan blade mid-section front reinforcing rib 23 and the fan blade mid-section reinforcing rib 24. The length of the fan blade front reinforcing rib 23 is greater than the length of the fan blade mid-section reinforcing rib 24, and the length of the fan blade mid-section reinforcing rib 24 is greater than the length of the fan blade rear-section reinforcing rib 25. Fan blade mid-section outer plates I 21 and II 22... The front reinforcing rib 23 near the middle section of the fan blade is provided with a front snap-fit ​​groove 26 for the middle section of the fan blade that matches the snap-fit ​​hook 14 of the front section of the fan blade. The other end of the outer plate I 21 and the outer plate II 22 of the middle section of the fan blade is provided with a rear snap-fit ​​hook 27 for the middle section of the fan blade.

[0037] fan blade tail section 3 Figure 4 As shown, its cross-section is A-shaped. The fan blade tail section 3 includes a fan blade tail section outer plate I 31 and a fan blade tail section outer plate II 32. One end of the fan blade tail section outer plate I 31 and the fan blade tail section outer plate II 32 are connected, and the other end is connected by a fan blade tail section reinforcing rib 33 arranged between the fan blade tail section outer plate I 31 and the fan blade tail section outer plate II 32. The fan blade tail section snap-fit ​​groove 34 matching the fan blade middle section rear snap-fit ​​hook 27 is provided at the end of the fan blade tail section outer plate I 31 and the fan blade tail section outer plate II 32 near the fan blade tail section reinforcing rib 33. The fan blade tail section tail plate 35 is fixed at the connection between the fan blade tail section outer plate I 31 and the fan blade tail section outer plate II 32. The fan blade tail section tail plate 35 is bent to one side and the fan blade tail section tail plate 35 smoothly transitions with the fan blade tail section outer plate I 31 and the fan blade tail section outer plate II 32.

[0038] The front section of the fan blade is engaged with the front section of the fan blade and welded to secure it. The rear section of the fan blade is engaged with the tail section of the fan blade and welded to secure it.

[0039] In summary, this application provides an assembled fan blade structure that divides the fan blade into three parts, which are extruded separately. This greatly reduces the reliance on aluminum alloy extrusion equipment and makes the blade less prone to deformation. It can improve the processing accuracy of the product, resulting in a high product yield and low overall cost. After the three parts are spliced ​​together, they are reinforced by argon arc welding, which improves the overall structural strength of the product, making it durable, long-lasting, and highly promising for application.

[0040] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0041] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A prefabricated fan blade structure, characterized in that: It includes the front section, middle section and tail section of the fan blade, which are assembled in sequence. The front section of the fan blade has an A-shaped cross-section, and the front section of the fan blade is provided with snap hooks on both sides of its edge. The cross-section of the middle section of the fan blade is H-shaped. One end of the two side plates of the middle section of the fan blade is provided with a front snap-fit ​​groove of the middle section of the fan blade that matches the snap-fit ​​hook of the front section of the fan blade, and the other end is provided with a rear snap-fit ​​hook of the middle section of the fan blade. The cross-section of the tail section of the fan blade is A-shaped, and the two sides of the tail section are provided with fan blade tail section locking grooves that match the locking hooks of the middle section of the fan blade. The tail plate of the tail section is connected to the two side plates of the tail section of the fan blade, and the tail plate of the tail section of the fan blade is smoothly connected to the two side plates of the tail section of the fan blade.

2. The assembled fan blade structure according to claim 1, characterized in that, The front section of the fan blade includes a front section outer plate arranged in a ∧ shape with a rounded transition. The front section outer plate is provided with a front reinforcing rib and a rear reinforcing rib connecting the two sides of the front section outer plate. The rear reinforcing rib is closer to the front section snap hook than the front reinforcing rib.

3. The assembled fan blade structure according to claim 1, characterized in that, The middle section of the fan blade includes a middle section outer plate I and a middle section outer plate II arranged at intervals; The outer plate I and the outer plate II of the middle section of the fan blade are connected by front reinforcing ribs, middle reinforcing ribs and rear reinforcing ribs of the middle section of the fan blade arranged in sequence at intervals. The outer plate I and the outer plate II of the middle section of the fan blade are arc-shaped plates. The length of the front reinforcing rib of the middle section of the fan blade is greater than the length of the middle reinforcing rib of the middle section of the fan blade, and the length of the middle reinforcing rib of the middle section of the fan blade is greater than the length of the rear reinforcing rib of the middle section of the fan blade.

4. The assembled fan blade structure according to claim 3, characterized in that, The maximum distance between the outer plate I and the outer plate II of the middle section of the fan blade is located between the front reinforcing rib and the middle reinforcing rib of the middle section of the fan blade.

5. The assembled fan blade structure according to claim 1, characterized in that, The fan blade tail section includes fan blade tail section outer plate I and fan blade tail section outer plate II; One end of the outer plate I and the outer plate II of the blade tail section are connected, and the other end is connected by a blade tail section reinforcing rib arranged between the outer plate I and the outer plate II of the blade tail section. The outer plate I and the outer plate II of the blade tail section are provided with a blade tail section snap-fit ​​groove near the blade tail section reinforcing rib. The blade tail section tail plate is fixed at the connection between the outer plate I and the outer plate II of the blade tail section.

6. The assembled fan blade structure according to claim 5, characterized in that, The tail section of the fan blade is bent to one side.

7. The assembled fan blade structure according to claim 1, characterized in that, The front section snap hook of the fan blade is snapped into the front snap groove of the middle section of the fan blade and welded to fix it. The middle section of the fan blade is engaged with the tail section of the fan blade via a locking hook and then welded to secure it.