Fan blade of industrial fan

Abstract

The utility model 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] The utility model belongs to the technical field of machinery and relates to a fan blade, in particular to a fan blade of an industrial fan. Background Art

[0002] As a common equipment for space ventilation and cooling, industrial fans are widely used in tall spaces such as industrial plants, logistics warehouses, waiting rooms, exhibition halls, gymnasiums, and supermarkets. The airflow formed by the operation of large-diameter industrial fans pushes downward, and generates horizontal airflow after encountering the ground. The size of the airflow diffusion is related to the diameter of the fan, and the speed of the airflow diffusion is related to the speed of the fan blades. If the fan is running continuously, the airflow will move outward in large quantities until it encounters a side wall or obstacle and then rises, thus continuously forming an air circulation. Industrial fans can push a large amount of airflow to the ground, forming a horizontal movement of an airflow layer at a certain height on the ground, thereby promoting the overall air circulation. The advantage of this is the all-round ground coverage and three-dimensional circulation of air. The fan covers a large area and has low energy consumption.

[0003] For example, a new direct-drive industrial fan disclosed in a Chinese patent document (application number: 201921418117.6) includes a motor, a fan blade arranged on the motor, an upper plate of the fan blade bent downward to form a long arc plate, one long side of the lower plate of the fan blade is connected to the long side of the upper plate of the fan blade, and the other long side is welded to the lower side of the upper plate of the fan blade to form a long arched cavity, and a plurality of reinforcing ribs are arranged on the upper side of the lower plate of the fan blade along its length direction. The structural strength of the fan blade of this industrial fan is not high and affects its service life. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and proposes a fan blade of an industrial fan with high structural strength and long service life.

[0005] The purpose of the utility model can be achieved through the following technical solutions: the blades of an industrial fan include an upper blade part and a lower blade part, a cavity is formed between the upper blade part and the lower blade part, and it is characterized in that a support part is provided in the cavity, the lower end of the support part is connected to the lower blade part, the upper end of the support part is against the inner side wall of the lower blade part, and the upper blade part, the lower blade part and the support part are bent into an integrated structure.

[0006] The lower end of the support part is connected to the lower fan blade part, and the upper end of the support part is against the inner wall of the lower fan blade part, which increases the structural strength of the fan blade and improves its service life. Since the upper fan blade part, the lower fan blade part and the support part adopt a single plate bending one-piece molding structure, the fan blade is easy to manufacture and has high strength and a long service life.

[0007] In the above-mentioned industrial fan blade, the support part is triangular, and the lower blade part is bent upward to form the above-mentioned support part. With the above-mentioned structure, the support part has a better support effect, improves the structural strength, and thus improves the service life. As another way, the support part is triangular, and the upper blade part is bent downward to form the above-mentioned support part.

[0008] In the above-mentioned industrial fan blade, the support part is quadrilateral and the upper and lower ends of the support part are respectively against the inner side walls of the upper blade part and the lower blade part. The above-mentioned arrangement improves the supporting effect of the support part, thereby improving the strength of the fan blade.

[0009] In the above-mentioned industrial fan blade, the portion where the lower blade portion is connected to the support portion is fixedly connected by welding. With the above-mentioned arrangement, the lower blade portion and the support portion are firmly connected and can smoothly transition, thereby improving the flow guiding performance of the blade.

[0010] In the above-mentioned blade of the industrial fan, the number of the supporting portion is 1 and the supporting portion is located in the middle of the cavity.

[0011] In the above-mentioned industrial fan blade, the number of the supporting parts is 2 and the two supporting parts are located on both sides of the cavity. The above-mentioned arrangement increases the strength of the fan blade and prolongs its service life.

[0012] In the above-mentioned industrial fan blade, the side of the lower blade portion close to the support portion is the mounting portion, the cavity is for the connection pad to be inserted, and the side walls of the mounting portion, the support portion and the upper blade portion are for the connection pad to abut against. The connection pad is inserted into the cavity and abuts against the inner side walls of the mounting portion, the support portion and the upper blade portion, and is fixedly connected by screws, which has the advantage of a firm connection for the connection pad.

[0013] In the above-mentioned blades of the industrial fan, the outer side wall of the upper blade portion is composed of an arc-shaped surface with at least two sections of different curved surfaces.

[0014] In the above-mentioned blades of the industrial fan, the wall thickness of the blades is 0.4-1.2 mm.

[0015] In the above-mentioned industrial fan blade, the material of the present blade is high-strength steel, and its yield strength is 350MPa-1000MPa. The present blade adopts the above-mentioned high-strength steel, which has the advantages of high strength and long service life.

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

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

[0018] 2. The upper blade part, the lower blade part and the support part adopt a bending integrated molding structure, which makes the fan blade easy to manufacture, high in strength and has a long service life;

[0019] 3. The support part is triangular in shape, and the lower blade part is bent upward to form the support part, so that the support part has a better supporting effect, improves the structural strength, and thus increases 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional view of the fan blades of this industrial fan.

[0022] Figure 2 It is a schematic diagram of the insertion connection pad of the fan blade of the industrial fan.

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

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

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

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

[0027] In the figure, 1, upper fan blade part; 2, lower fan blade part; 3, cavity; 4, supporting part; 5, mounting part; 6, connecting pad; m, weld. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figure 1 and 2As shown, the blades of the industrial fan include an upper blade portion 1 and a lower blade portion 2. A cavity 3 is formed between the upper blade portion 1 and the lower blade portion 2. The outer wall of the upper blade portion 1 is composed of an arc surface with at least two sections of different curved surfaces. A support portion 4 is provided in the cavity 3. The support portion 4 is triangular in shape. The lower blade portion 2 is bent upward to form the support portion 4. The lower end of the support portion 4 is connected to the lower blade portion 2. The upper end of the support portion 4 is against the inner wall of the lower blade portion 2. The upper blade portion 1, the lower blade portion 2 and the support portion 4 are formed by bending in one piece. As another way, Figure 3 As shown, the support portion is triangular in shape, and the upper fan blade portion is bent downward to form the above-mentioned support portion.

[0030] As another way, Figure 4 As shown, the support portion 4 is quadrilateral and the upper and lower ends of the support portion 4 are respectively against the inner walls of the upper blade portion 1 and the lower blade portion 2, which improves the supporting effect of the support portion 4 and thus improves the strength of the fan blade.

[0031] The portion where the lower blade portion 2 is connected to the support portion 4 is fixedly connected by welding, so that the connection between the lower blade portion 2 and the support portion 4 is firm and can be smoothly transitioned, thereby improving the flow conduction performance of the present blade. The middle portion of the upper blade portion 1 is fixedly connected by welding and the outer side wall of the upper blade portion 1 is smoothly transitioned, which has high strength and improves the flow conduction performance of the present blade. Specifically, m is a weld.

[0032] The side of the lower fan blade part 2 close to the supporting part 4 is the mounting part 5, and the connecting pad 6 is inserted into the cavity 3. The side walls of the mounting part 5, the supporting part 4 and the upper fan blade part 1 are abutted against the connecting pad 6. The connecting pad 6 is inserted into the cavity 3 and abuts against the mounting part 5, the supporting part 4 and the inner side walls of the upper fan blade part 1, and is fixedly connected by screws, which has the advantage of a firm connection for the connecting pad 6.

[0033] As another way, Figure 5 As shown, there are two support parts 4, which are triangular in shape and located on both sides of the cavity 3, thereby increasing the strength of the fan blade and prolonging its service life.

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

[0035] The material of the fan blade is high-strength steel, and its yield strength is 350MPa-1000MPa, the wall thickness of the fan blade is 0.4-1.2mm, and preferably, the wall thickness of the fan blade is 0.6mm, which has the advantages of high strength and long service life. As another way, the material of the fan blade is stainless steel.

[0036] The lower end of the support portion 4 is connected to the lower blade portion 2, and the upper end of the support portion 4 is against the inner wall of the lower blade portion 2, which increases the structural strength of the blade and improves the service life. Since the upper blade portion 1, the lower blade portion 2 and the support portion 4 adopt a bent integrated structure, the blade is easy to manufacture and has high strength and a long service life. The support portion 4 is triangular, and the lower blade portion 2 is bent upward to form the support portion 4, so that the support portion 4 has a better supporting effect, improves the structural strength, and thus improves the service life.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although the terms such as upper blade portion 1, lower blade portion 2, cavity 3, support portion 4, mounting portion 5, connecting pad 6 are frequently used in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A fan blade of 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: A support portion (4) is provided in the cavity (3), the lower end of the support portion (4) is connected to the lower fan blade portion (2), the upper end of the support portion (4) is against the inner wall of the lower fan blade portion (2), and the upper fan blade portion (1), the lower fan blade portion (2) and the support portion (4) adopt a bent one-piece molding structure.

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

3. The blade of the industrial fan according to claim 1, characterized in that: The support portion (4) is in the shape of a quadrilateral, and the upper and lower ends of the support portion (4) respectively abut against the inner side walls of the upper fan blade portion (1) and the lower fan blade portion (2).

4. The blade of the industrial fan according to claim 1, 2 or 3, characterized in that: The portion where the lower blade portion (2) is connected to the support portion (4) is fixedly connected by welding.

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

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

7. The blade of the industrial fan according to claim 1, 2 or 3, characterized in that: The side of the lower blade portion (2) close to the support portion (4) is a mounting portion (5), the cavity (3) is for the connecting pad (6) to be inserted into, and the mounting portion (5), the support portion (4) and the side wall of the upper blade portion (1) are for the connecting pad (6) to abut against.

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

9. The blade 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 blade of the industrial fan according to claim 9, characterized in that: The material of the fan blade is high-strength steel, and its yield strength is 350MPa-1000MPa.

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