A new type of fan blade

Abstract

The utility model provides a novel fan blade of fan belongs to mechanical technical field. It has solved the problem of the fan blade structure strength of existing fan is not high and has affected the service life. The novel fan blade of this fan, including upper fan blade part and lower fan blade part, the cavity is formed between upper fan blade part and lower fan blade part, and the support part is arranged in the cavity, and upper fan blade part, lower fan blade part and support part are the plate continuous cold bending integrated structure, and upper fan blade part includes the two end of plate, and the two end is located in the middle part of upper fan blade part, and the two end is abutted on the upper end of support part and the two end and the upper end of support part are fixedly connected by welding, and the lower end of support part and lower fan blade part are fixedly connected by welding. This novel fan blade of fan has the advantages of high structural strength and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a fan blade, particularly a novel fan blade. Background Technology

[0002] Fans, as a common device for space ventilation and cooling, are widely used in large spaces such as industrial plants, logistics warehouses, waiting rooms, exhibition halls, stadiums, and shopping malls. When a large-diameter industrial fan operates, the airflow it generates is pushed downwards, creating a horizontal airflow upon reaching the ground. The extent of this airflow diffusion is related to the fan's diameter, while the speed of diffusion is related to the speed of the fan blades. If the fan operates continuously, the airflow will be pushed outwards in large quantities until it encounters a side wall or obstacle and rises, thus continuously forming an air circulation. Fans can push a large amount of airflow to the ground, forming a horizontal airflow layer at a certain height, thereby promoting overall air circulation. The advantages of this are comprehensive ground coverage and three-dimensional air circulation, large fan coverage area, and low energy consumption.

[0003] For example, a novel direct-drive industrial fan disclosed in Chinese patent literature (application number: 201921418117.6) includes a motor, fan blades mounted on the motor, an upper plate of the fan blade bent downwards to form a long, arc-shaped plate, a lower plate of the fan blade with one long side connected to the long side of the upper plate, and another long side welded to the lower side of the upper plate to form a long, arched cavity, with several reinforcing ribs arranged along its length on the upper side of the lower plate. The fan blades of this industrial fan have low structural strength, which affects their service life. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a novel fan blade with high structural strength and long service life.

[0005] The objective of this utility model can be achieved through the following technical solution: A novel fan blade, comprising an upper fan blade portion and a lower fan blade portion, wherein a cavity is formed between the upper fan blade portion and the lower fan blade portion, characterized in that a support portion is provided within the cavity, the upper fan blade portion, the lower fan blade portion and the support portion are integrally formed by continuous cold bending of sheet metal, the upper fan blade portion includes two stop ends of sheet metal, the two stop ends are located in the middle of the upper fan blade portion, the two stop ends abut against the upper end of the support portion and are fixedly connected to the upper end of the support portion by welding, and the lower end of the support portion is fixedly connected to the lower fan blade portion by welding.

[0006] Because the upper fan blade, lower fan blade, and support are formed by continuous cold bending of sheet metal, the fan blade is easy to manufacture, has high strength, and a long service life. The lower end of the support is fixedly connected to the lower fan blade by welding, and the two ends of the sheet metal abut against the upper end of the support and are fixedly connected by welding, which increases the structural strength of the fan blade and improves its service life.

[0007] In the novel fan blade described above, recessed shoulders are provided on both the left and right sides of the upper end of the support portion, and the two ends of the plate abut against the corresponding shoulders. This design provides the advantages of good positioning between the ends and the support portion, as well as a secure connection.

[0008] In the novel fan blade described above, the middle portion of the upper end of the support portion smoothly transitions to the upper fan blade portion. This design offers the advantage of good airflow guidance.

[0009] In the novel fan blade described above, the support portion is triangular, and the lower fan blade is bent upwards to form the support portion. This structure provides better support, improves structural strength, and thus extends service life. Alternatively, the support portion can be triangular, with the upper fan blade bent downwards to form the support portion.

[0010] In the novel fan blade described above, the lower fan blade portion near the support portion is a mounting portion. A connecting pad is inserted into the cavity, and the mounting portion, support portion, and upper fan blade portion are abutted against by the connecting pad. The connecting pad is inserted into the cavity and abuts against the mounting portion, support portion, and upper fan blade portion, and is fixedly connected by screws, providing a strong connection for the connecting pad.

[0011] In the aforementioned novel fan blade, the outer wall of the upper fan blade is composed of at least two arc-shaped surfaces with different curvatures.

[0012] In the aforementioned novel fan blade, the wall thickness of the fan blade is 0.4-1.2 mm.

[0013] In the aforementioned novel fan blade, the blade is made of high-strength steel with a yield strength of 350 MPa-1000 MPa. This fan blade, made of the aforementioned high-strength steel, possesses the advantages of high strength and long service life.

[0014] Compared with existing technologies, the novel fan blades of this invention have the following advantages:

[0015] 1. Because the upper fan blade, lower fan blade and support part are made of sheet metal through continuous cold bending and integral forming, the fan blade is easy to manufacture, has high strength and a long service life.

[0016] 2. The lower end of the support is fixedly connected to the lower fan blade by welding, and the two ends of the plate abut against the upper end of the support and are fixedly connected by welding, which increases the structural strength of the fan blade and improves its service life.

[0017] 3. The upper left and right sides of the support are provided with recessed shoulders, and the two ends of the plate abut against the corresponding shoulders, which has the advantages of good positioning effect between the ends and the support and firm connection.

[0018] 4. The support section is triangular in shape, with the lower fan blade bent upwards to form the support section. This provides better support, improves structural strength, and thus extends service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a novel fan blade embodiment 1.

[0020] Figure 2 This is a schematic diagram of the structure of the novel fan blade with a connecting pad inserted into its cavity.

[0021] Figure 3 This is a schematic diagram of another type of fan blade structure.

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this fan blade.

[0023] In the figure, 1 is the upper fan blade; 2 is the lower fan blade; 3 is the support part; 3a is the shoulder; 4 is the stop end; 5 is the mounting part; and 6 is the connecting pad. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1

[0026] like Figure 1 and 2 As shown, a novel fan blade includes an upper fan blade portion 1 and a lower fan blade portion 2. A cavity is formed between the upper fan blade portion 1 and the lower fan blade portion 2. A support portion 3 is provided in the cavity. The upper fan blade portion 1, the lower fan blade portion 2, and the support portion 3 are integrally formed by continuous cold bending of sheet metal. The upper fan blade portion 1 includes two stop ends 4 of sheet metal. The two stop ends 4 are located in the middle of the upper fan blade portion 1. The two stop ends 4 abut against the upper end of the support portion 3 and are welded to the upper end of the support portion 3. The lower end of the support portion 3 is welded to the lower fan blade portion 2.

[0027] The support part 3 is triangular in shape, and the lower fan blade part 2 is bent upward to form the aforementioned support part 3, which gives the support part 3 a better supporting effect, improves the structural strength, and thus increases the service life. Alternatively, as... Figure 3 As shown, the support part 3 is triangular in shape, and the upper fan blade part 1 is bent downward to form the support part 3 mentioned above.

[0028] The lower fan blade 2 has a mounting part 5 on the side near the support part 3. A connecting pad 6 is inserted into the cavity, and the mounting part 5, support part 3, and upper fan blade 1 are supported by the connecting pad 6. The connecting pad 6 is inserted into the cavity and abuts against the mounting part 5, support part 3, and upper fan blade 1, and is fixed together by screws, which has the advantage of a firm connection to the connecting pad 6.

[0029] The outer wall of the upper fan blade 1 is composed of at least two arc-shaped surfaces with different curvatures. The wall thickness of this fan blade is 0.4-1.2mm, and its material is high-strength steel with a yield strength of 350MPa-1000MPa, which has the advantages of high strength and long service life.

[0030] Because the upper fan blade 1, lower fan blade 2, and support 3 are formed by continuous cold bending of sheet metal, the fan blade is easy to manufacture, has high strength, and a long service life. The lower end of the support 3 is fixedly connected to the lower fan blade 2 by welding, and the two stop ends 4 of the sheet metal abut against the upper end of the support 3 and are fixedly connected by welding, which increases the structural strength of the fan blade and improves its service life.

[0031] Example 2

[0032] This embodiment is largely the same in structure and principle as Embodiment 1, except that: Figure 4 As shown, the upper end of the support part 3 has sunken shoulders 3a on both the left and right sides. The two stops 4 of the plate abut against the corresponding shoulders 3a. The middle part of the upper end of the support part 3 smoothly transitions to the upper fan blade part 1, which gives the stops 4 and the support part 3 good positioning effect and strong connection.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as upper fan blade 1, lower fan blade 2, support 3, shoulder 3a, stop 4, mounting part 5, and connecting pad 6, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A novel fan blade, comprising an upper fan blade portion (1) and a lower fan blade portion (2), wherein a cavity is formed between the upper fan blade portion (1) and the lower fan blade portion (2), characterized in that, The cavity is provided with a support part (3), and the upper fan blade part (1) includes two stop ends (4) of the plate. The two stop ends (4) are located in the middle of the upper fan blade part (1). The two stop ends (4) abut against the upper end of the support part (3) and are fixedly connected to the upper end of the support part (3) by welding. The lower end of the support part (3) is fixedly connected to the lower fan blade part (2) by welding.

2. The novel fan blade according to claim 1, characterized in that, The upper fan blade (1), lower fan blade (2) and support (3) are integrally formed structures by continuous cold bending of sheet metal.

3. The novel fan blade according to claim 1, characterized in that, The upper left and right sides of the support part (3) are provided with sunken shoulders (3a), and the two ends (4) of the plate abut against the corresponding shoulders (3a).

4. A novel fan blade according to claim 3, characterized in that, The middle part of the upper end of the support part (3) smoothly transitions to the upper fan blade part (1).

5. A novel fan blade according to claim 1, 2, 3, or 4, characterized in that, The support part (3) is triangular in shape, and the lower fan blade part (2) is bent upward to form the support part (3).

6. A novel fan blade according to claim 1, 2, 3, or 4, characterized in that, The lower fan blade (2) is mounted on the side near the support (3). A connecting pad (6) is inserted into the cavity. The mounting part (5), the support (3), and the upper fan blade (1) are abutted by the connecting pad (6).

7. A novel fan blade according to claim 1, 2, 3, or 4, characterized in that, The outer wall of the upper fan blade (1) is composed of at least two arc-shaped surfaces with different curvatures.

8. A novel fan blade according to claim 1, 2, 3, or 4, characterized in that, The wall thickness of this fan blade is 0.4-1.2mm.

9. A novel fan blade according to claim 1, 2, 3, or 4, characterized in that, The fan blade is made of high-strength steel with a yield strength of 350MPa-1000MPa.

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