Fan blade of novel industrial fan

Abstract

The utility model provides a novel fan blade of an industrial fan, and belongs to the technical field of machinery. The novel industrial fan solves the problems that the structural strength of fan blades of an existing novel industrial fan is not high, and the service life is affected. The novel fan blade of the industrial fan comprises a body, the body is of an integrally-formed structure formed by bending a plate, the body 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, one end of the body is bent to form an L-shaped supporting part, the supporting part is located in the cavity, and the other end of the body abuts against the supporting part and is fixedly connected with the supporting part in a welded mode. The bottom face of the supporting part abuts against the inner end face of the lower fan blade part and is fixedly connected with the inner end face through welding. The fan blade of the novel industrial fan has the advantages of being high in structural strength, long in service life, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a fan blade, in particular to a novel 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 type of 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, a long side of the lower plate of the fan blade connected to the long side of the upper plate of the fan blade, and the other long side 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. 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 new type of industrial fan blade 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 a new industrial fan include a body, characterized in that the body is a plate-shaped integrally formed structure by bending, the body includes an upper blade portion and a lower blade portion, a cavity is formed between the upper blade portion and the lower blade portion, one end of the body is bent to form an L-shaped support portion, the support portion is located in the cavity, the other end of the body abuts against the support portion and is fixedly connected by welding, and the bottom surface of the support portion abuts against the inner end surface of the lower blade portion and is fixedly connected by welding.

[0006] One end of the main body is bent to form an L-shaped supporting portion and its bottom surface abuts against the inner end surface of the lower fan blade portion and is fixedly connected by welding, and the other end of the main body abuts against the supporting portion and is fixedly connected by welding, thereby increasing the structural strength of the fan blade and improving its service life. Since the upper fan blade portion, the lower fan blade portion and the supporting portion adopt an integrated structure formed by bending a plate and are fixedly connected by welding, the fan blade is easy to manufacture, energy-saving and environmentally friendly, has high strength, and has a long service life.

[0007] In the above-mentioned new industrial fan blade, the other end of the body has a bent portion formed by bending inward, and the bent portion is pressed against the side wall of the support portion. The bent portion is pressed against the side wall of the support portion, which improves the positioning and connection effect between the other end of the body and the support portion, making the fan blade have higher strength, thereby increasing the service life.

[0008] In the blade of the novel industrial fan, one end of the body has a bent abutment portion, the abutment portion is arranged horizontally, the support portion is connected to the outer end of the abutment portion, and the other end of the body is abutted against the abutment portion and is fixedly connected by welding. The above arrangement has good supporting effect and good connection effect, and improves the strength of the blade.

[0009] In the above-mentioned novel industrial fan blade, the side of the lower blade portion close to the support portion is the mounting portion, the cavity is for the connecting pad to be inserted, and the side walls of the mounting portion, the support portion and the upper blade portion are 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, the support portion and the upper blade portion, and is fixedly connected by screws, which has the advantage of a firm connection for the connecting pad.

[0010] In the above-mentioned new industrial fan blade, the outer side wall of the upper blade portion is composed of at least two arc-shaped surfaces with different curvatures. With the above-mentioned arrangement, the fan blade has a better flow guiding effect and has the advantages of energy saving and environmental protection.

[0011] In the above-mentioned blades of the novel industrial fan, the wall thickness of the body is 0.4-1.2 mm.

[0012] In the above-mentioned new industrial fan blade, the material of the body is high-strength steel, and its yield strength is 350MPa-1000MPa. The fan blade adopts the above-mentioned high-strength steel, which has the advantages of high strength and long service life.

[0013] Compared with the prior art, the fan blades of this new industrial fan have the following advantages:

[0014] 1. One end of the body is bent to form an L-shaped support portion, and its bottom surface is against the inner end surface of the lower fan blade portion and is fixedly connected by welding. The other end of the body is against the support portion and is fixedly connected by welding, which increases the structural strength of the fan blade and improves its service life;

[0015] 2. Since the upper blade part, the lower blade part and the support part adopt a single plate bending integrated molding structure, the fan blade is easy to manufacture, energy-saving and environmentally friendly, has high strength, and has a long service life;

[0016] 3. The bent portion is attached to the side wall of the support portion, which improves the positioning and connection effect between the other end of the body and the support portion, making the fan blade have higher strength, thereby increasing the service life;

[0017] 4. One end of the main body has a bent abutment portion, which is arranged horizontally. The supporting portion is connected to the outer end of the abutment portion, and the other end of the main body is abutted against the upper end of the abutment portion, which has good supporting and connecting effects and improves the strength of the fan blade.

[0018] 5. The outer wall of the upper fan blade portion is composed of at least two arc-shaped surfaces with different curvatures, so that the fan blade has a better flow-guiding effect and has the advantages of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the blades of a new type of industrial fan.

[0020] Figure 2 It is a structural schematic diagram of the connecting pad being inserted into the cavity of the fan blade.

[0021] Figure 3 This is a schematic diagram of the structure of another type of fan blades for a new type of industrial fan.

[0022] In the figure, 1, main body; 2, upper fan blade part; 3, lower fan blade part; 4, cavity; 5, supporting part; 6, bending part; 7, abutting part; 8, mounting part; m, weld; 9, connecting pad. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1 and 2As shown, the blade of the new industrial fan includes a body 1, characterized in that the body 1 is formed by bending a plate into an integral structure, the body 1 includes an upper blade portion 2 and a lower blade portion 3, a cavity 4 is formed between the upper blade portion 2 and the lower blade portion 3, one end of the body 1 is bent to form an L-shaped support portion 5, the support portion 5 is located in the cavity 4, the other end of the body 1 abuts against the support portion 5 and is fixedly connected, the bottom surface of the support portion 5 abuts against the inner end surface of the lower blade portion 3 and is fixedly connected by welding. The other end of the body 1 has a bending portion 6 formed by bending inward, the bending portion 6 abuts against the side wall of the support portion 5 and forms a weld m by welding, which improves the positioning and connection effect of the other end of the body 1 and the support portion 5, so that the blade has a higher strength, thereby increasing the service life. The number of welds m on the outer wall of the body 1 is one, located in the middle of the upper blade portion 2, which improves the strength of the blade and has a better flow diversion effect.

[0025] The side of the lower fan blade part 3 close to the supporting part 5 is the mounting part 8, and the connecting pad 9 is inserted into the cavity 4. The side walls of the mounting part 8, the supporting part 5 and the upper fan blade part 2 are used for the connecting pad 9 to abut against. The connecting pad 9 is inserted into the cavity 4 and abuts against the mounting part 8, the supporting part 5 and the inner side walls of the upper fan blade part 2, and is fixedly connected by screws, which has the advantage of a firm connection for the connecting pad 9.

[0026] The outer side wall of the upper blade portion 2 is composed of at least two arc-shaped surfaces with different curvatures, so that the blade has a better flow-guiding effect and has the advantages of energy saving and environmental protection.

[0027] The wall thickness of the body 1 is 0.4-1.2 mm. Preferably, the wall thickness of the body 1 is 0.6 mm. The material of the body 1 is high-strength steel, and its yield strength is 350 MPa-1000 MPa, which has the advantages of high strength and long service life.

[0028] One end of the main body 1 is bent to form an L-shaped support portion 5 and its bottom surface abuts against the inner end surface of the lower fan blade portion 3 and is fixedly connected by welding, and the other end of the main body 1 abuts against the support portion 5 and is fixedly connected, which increases the structural strength of the fan blade and improves the service life. Since the upper fan blade portion 2, the lower fan blade portion 3 and the support portion 5 adopt a single plate bending integrally formed structure, the fan blade is easy to manufacture, energy-saving and environmentally friendly, has high strength, and has a long service life.

[0029] As another option, Figure 3 As shown, one end of the main body 1 has a bent abutment portion 7, the abutment portion 7 is arranged horizontally, the support portion 5 is connected to the outer end of the abutment portion 7, and the other end of the main body 1 is abutted against the abutment portion 7 and fixedly connected by welding, which has good supporting effect and good connection effect, and improves the strength of the fan blade.

[0030] 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.

[0031] Although the terms such as body 1, upper blade part 2, lower blade part 3, cavity 4, support part 5, bending part 6, abutting part 7, mounting part 8, weld m, connecting pad 9 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel industrial fan blade, comprising a body (1), characterized in that: The main body (1) is an integrally formed structure of a plate by bending, and the main body (1) includes an upper fan blade portion (2) and a lower fan blade portion (3), a cavity (4) is formed between the upper fan blade portion (2) and the lower fan blade portion (3), one end of the main body (1) is bent to form an L-shaped support portion (5), and the support portion (5) is located in the cavity (4), the other end of the main body (1) abuts against the support portion (5) and is fixedly connected by welding, and the bottom surface of the support portion (5) abuts against the inner end surface of the lower fan blade portion (3) and is fixedly connected by welding.

2. The blade of the new industrial fan according to claim 1 is characterized in that: The other end of the body (1) has a bent portion (6) bent inwardly, and the bent portion (6) is in contact with the side wall of the support portion (5).

3. The blade of the new industrial fan according to claim 1 is characterized in that: One end of the body (1) has a bent abutment portion (7), the abutment portion (7) is arranged in a transverse direction, the support portion (5) is connected to the outer end of the abutment portion (7), and the other end of the body (1) is abutted against the abutment portion (7) and fixedly connected by welding.

4. The blade of the novel industrial fan according to claim 1, 2 or 3, characterized in that: The side of the lower blade portion (3) close to the support portion (5) is a mounting portion (8), the cavity (4) is for the connecting pad to be inserted into, and the mounting portion (8), the support portion (5) and the side wall of the upper blade portion (2) are for the connecting pad to abut against.

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

6. The blade of the novel industrial fan according to claim 1, 2 or 3, characterized in that: The wall thickness of the main body (1) is 0.4-1.2 mm.

7. The blade of the novel industrial fan according to claim 1, 2 or 3, characterized in that: The material of the main body (1) is high-strength steel, and its yield strength is 350MPa-1000MPa.

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