Fan blade of industrial fan

Abstract

The invention provides a fan blade of an industrial fan, and belongs to the technical field of machinery. The problems that the structural strength of fan blades of an existing industrial fan is not high, and the service life is affected are solved. The fan blade of the industrial fan comprises an upper fan blade part and a lower fan blade part, a cavity is formed between the upper fan blade part and the lower fan blade part, a supporting part is arranged in the cavity, the lower end of the supporting part is connected with the lower fan blade part, the upper end of the supporting part abuts against the inner side wall of the lower fan blade part, and the upper fan blade part, the lower fan blade part and the supporting part are of a bent integrally-formed structure. The fan blade of the industrial fan has the advantages of being high in structural strength and long in service life.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a fan blade, particularly a fan blade for an industrial fan. Background Technology

[0002] Industrial fans, commonly used for space ventilation and cooling, are widely applied 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, at which point it rises, thus continuously creating air circulation. Industrial 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 fan blade for an industrial fan with high structural strength and long service life.

[0005] The objective of this invention can be achieved through the following technical solution: an industrial fan blade, including an upper fan blade and a lower fan blade, wherein a cavity is formed between the upper fan blade and the lower fan blade, characterized in that a support portion is provided in the cavity, the lower end of the support portion is connected to the lower fan blade, the upper end of the support portion abuts against the inner sidewall of the lower fan blade, and the upper fan blade, the lower fan blade, and the support portion are integrally formed by bending.

[0006] The lower end of the support is connected to the lower fan blade, and the upper end of the support abuts against the inner wall of the lower fan blade, which increases the structural strength of the fan blade and improves its service life. Since the upper fan blade, lower fan blade and support are formed by bending a single plate, the gap between the outer surfaces of the upper fan blade and the lower fan blade is connected by welding, making the fan blade easy to manufacture, strong and with a long service life.

[0007] In the aforementioned industrial fan blades, the support portion is triangular, and the lower blade portion 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 blade portion bent downwards to form the support portion.

[0008] In the aforementioned industrial fan blades, the support portion is quadrilateral, and its upper and lower ends abut against the inner walls of the upper and lower fan blades, respectively. This arrangement improves the support effect of the support portion, thereby increasing the strength of the fan blades.

[0009] In the aforementioned industrial fan blades, the lower blade portion is fixedly connected to the support portion by welding. This arrangement ensures a firm connection and smooth transition between the lower blade portion and the support portion, improving the airflow guiding performance of the fan blades.

[0010] In the aforementioned industrial fan blades, there is one support portion, and the support portion is located in the middle of the cavity.

[0011] In the aforementioned industrial fan blades, there are two support portions, located on opposite sides of the cavity. This arrangement increases the strength of the fan blades and extends their service life.

[0012] In the aforementioned industrial fan blades, the lower 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 the side walls of the upper blade portion are used for the connecting pad to abut against. The connecting pad is inserted into the cavity and abuts against the inner side walls of the mounting portion, support portion, and upper blade portion, and is fixed together with screws, providing a strong connection for the connecting pad.

[0013] In the aforementioned industrial fan blades, the outer wall of the upper blade portion is composed of at least two arc-shaped surfaces with different curvatures.

[0014] In the aforementioned industrial fan blades, the wall thickness of the blades described herein is 0.4-1.2 mm.

[0015] In the aforementioned industrial fan blades, the material of this blade is high-strength steel, with a yield strength of 350MPa-1000MPa. This high-strength steel blade offers advantages such as high strength and long service life.

[0016] Compared with existing technologies, the blades of this industrial fan have the following advantages:

[0017] 1. The lower end of the support is connected to the lower fan blade, and the upper end of the support abuts against the inner wall of the lower fan blade, which increases the structural strength of the fan blade and improves its service life.

[0018] 2. The upper fan blade, lower fan blade, and support are formed by bending into one piece, which makes the fan blade easy to manufacture, has high strength, and a long service life.

[0019] 3. The support part is triangular in shape, and the lower fan blade is bent upward to form the support part, which gives the support part a better support effect, improves the structural strength, and thus improves the service life.

[0020] 4. The fan blade is made of high-strength steel, which has the advantages of high strength and long service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cross-section of the fan blades of this industrial fan.

[0022] Figure 2 This is a schematic diagram of the insertion and connection pad for the fan blades of this industrial fan.

[0023] Figure 3 This is a cross-sectional schematic diagram of another type of fan blade for this industrial fan.

[0024] Figure 4 This is a cross-sectional schematic diagram of another type of fan blade for this industrial fan.

[0025] Figure 5 This is a cross-sectional schematic diagram of another type of fan blade for this industrial fan.

[0026] Figure 6 This is a cross-sectional schematic diagram of another type of fan blade for this industrial fan.

[0027] In the diagram, 1 is the upper fan blade; 2 is the lower fan blade; 3 is the cavity; 4 is the support; 5 is the mounting part; 6 is the connecting pad; and m is the weld. Detailed Implementation

[0028] 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.

[0029] like Figure 1 and 2As shown, the fan blades of an industrial fan include an upper fan blade 1 and a lower fan blade 2, with a cavity 3 formed between the upper fan blade 1 and the lower fan blade 2. The outer wall of the upper fan blade 1 is composed of at least two arc-shaped surfaces with different curvatures. A support part 4 is provided within the cavity 3. The support part 4 is triangular in shape, formed by bending the lower fan blade 2 upwards. The lower end of the support part 4 is connected to the lower fan blade 2, and the upper end of the support part 4 abuts against the inner wall of the lower fan blade 2. The upper fan blade 1, the lower fan blade 2, and the support part 4 are formed by bending a single plate into a single structure. Alternatively, as... Figure 3 As shown, the support part is triangular in shape, and the upper fan blade is bent downward to form the aforementioned support part.

[0030] As another way, such as Figure 4 As shown, the support part 4 is quadrilateral and its upper and lower ends abut against the inner sidewalls of the upper fan blade part 1 and the lower fan blade part 2, respectively, which improves the support effect of the support part 4 and thus improves the strength of the fan blade.

[0031] The lower fan blade 2 is connected to the support 4 by welding, ensuring a strong and smooth transition between them and improving the airflow guiding performance of the fan blade. The middle section of the upper fan blade 1 is also welded together, and the outer wall of the upper fan blade 1 has a smooth transition, resulting in high strength and improved airflow guiding performance. Specifically, m represents the weld seam.

[0032] The side of the lower fan blade 2 closest to the support part 4 is the mounting part 5. The cavity 3 is for inserting the connecting pad 6. The mounting part 5, the support part 4, and the side wall of the upper fan blade 1 are for the connecting pad 6 to abut against. The connecting pad 6 is inserted into the cavity 3 and abuts against the inner side wall of the mounting part 5, the support part 4, and the upper fan blade 1, and is fixed together by screws, which has the advantage of a firm connection to the connecting pad 6.

[0033] As another way, such as Figure 5 As shown, there are two support parts 4. The two support parts 4 are triangular and located on both sides of the cavity 3, which increases the strength of the fan blade and improves its service life.

[0034] As another way, such as Figure 6 As shown, there are two support parts 4, which are arranged in a straight line and located on both sides of the cavity 3, which increases the strength of the fan blade and improves its service life.

[0035] The fan blade is made of high-strength steel with a yield strength of 350MPa-1000MPa and a wall thickness of 0.4-1.2mm. Preferably, the wall thickness is 0.6mm, which offers advantages such as high strength and long service life. Alternatively, the fan blade can be made of stainless steel.

[0036] The lower end of the support part 4 is connected to the lower fan blade part 2, and the upper end of the support part 4 abuts against the inner wall of the lower fan blade part 2, increasing the structural strength of the fan blade and improving its service life. Because the upper fan blade part 1, the lower fan blade part 2, and the support part 4 adopt a bent-in-one molding structure, the fan blade is easy to manufacture, has high strength, and a long service life. The support part 4 is triangular in shape, formed by bending the lower fan blade part 2 upwards, giving it a better supporting effect, improving structural strength, and thus increasing its service life.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention 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 the invention or exceeding the scope defined by the appended claims.

[0038] Although this document frequently uses terms such as upper fan blade 1, lower fan blade 2, cavity 3, support part 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 the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A fan blade for an industrial fan, comprising an upper fan blade portion (1) and a lower fan blade portion (2), wherein a cavity (3) is formed between the upper fan blade portion (1) and the lower fan blade portion (2), characterized in that, The cavity (3) is provided with a support part (4), the lower end of the support part (4) is connected to the lower fan blade part (2), and the upper end of the support part (4) abuts against the inner side wall of the lower fan blade part (2). The upper fan blade part (1), the lower fan blade part (2) and the support part (4) adopt a bent integral forming structure.

2. The fan blades of the industrial fan according to claim 1, characterized in that, The support part (4) is triangular in shape, and the lower fan blade part (2) is bent upward to form the support part (4).

3. The fan blades of the industrial fan according to claim 1, characterized in that, The support part (4) is quadrilateral and the upper and lower ends of the support part (4) abut against the inner sidewalls of the upper fan blade part (1) and the lower fan blade part (2), respectively.

4. The fan blades of the industrial fan according to claim 1, 2, or 3, characterized in that, The lower fan blade (2) and the support (4) are connected by welding.

5. The fan blades of the industrial fan according to claim 1, 2, or 3, characterized in that, The number of the support part (4) is one, and the support part (4) is located in the middle of the cavity (3).

6. The fan blades of the industrial fan according to claim 1, 2, or 3, characterized in that, The number of the support parts (4) is two, and the two support parts (4) are located on both sides of the cavity (3).

7. The fan blade of the industrial fan according to claim 1, 2, or 3, characterized in that, The lower fan blade (2) is mounted on the side near the support (4). A connecting pad (6) is inserted into the cavity (3). The connecting pad (6) abuts against the side walls of the mounting part (5), the support (4), and the upper fan blade (1).

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

9. The fan blades of the industrial fan according to claim 1, 2, or 3, characterized in that, The wall thickness of this fan blade is 0.4-1.2mm.

10. The fan blade of the industrial fan according to claim 9, characterized in that, The fan blade is made of high-strength steel with a yield strength of 350MPa-1000MPa.

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