Axial flow fan with combined fan blades

Abstract

The utility model provides an axial fan with combined fan blades, which comprises a casing, a motor support fixedly arranged on the air inlet side of the casing, a motor fixedly arranged at the axis of the motor support, an impeller fixedly connected with the shaft end of an output shaft of the motor through a flange structure, and a plurality of independent fan blades. And a plurality of fan blades are uniformly fixed on the circumference of the flange structure (4). Every two adjacent fan blades are connected through a fan blade reinforcing structure, and the fan blade reinforcing structures are used for improving the structural strength of the fan blades. The adjacent fan blades of the axial flow fan are connected through the blade reinforcing ribs, fan blade deformation caused by centrifugal force and airflow resistance when the impeller rotates is reduced, then it is guaranteed that the air supply efficiency reaches the design value, and the air supply amount is increased. The impeller of the axial flow fan is formed by assembling the split type fan blades, the same set of die is adopted during production of the fan blades, the eccentric weight error between the fan blades is reduced, and vibration caused by gravity center deviation of the assembled impeller during rotation is smaller.

Description

TECHNICAL FIELD

[0001] The utility model relates to the fan technical field of combined fan blade, concretely is the axial fan of combined fan blade. BACKGROUND

[0002] The axial fan is very wide in application in production and life, and can quickly provide required wind power to meet the wind power demand of production and life. When rotating, the fan drives airflow to flow forward through the impeller, thereby realizing the air supply effect. When a large amount of air is required, the rotating speed of the impeller is generally increased, thereby the flow rate of the airflow and the air volume can be increased. However, when the impeller rotates, the fan blade will deform to a certain extent, and the faster the rotating speed, the greater the wind resistance and centrifugal force the fan blade receives, and the greater the deformation amount, thereby affecting the air supply effect of the fan and reducing the air supply efficiency. Moreover, the narrower the blade width of the fan blade and / or the longer the radial length of the fan blade, the greater the deformation amount, thereby greatly reducing the air supply efficiency.

[0003] In addition, the impeller of the existing axial fan is usually of an integral structure in the production process, which often has a certain amount of unbalance, thereby causing the impeller to vibrate when rotating due to the unbalance, and the vibration is transmitted to the shell of the fan through the connecting part, thereby further amplifying the vibration and noise, which greatly affects the use experience of the fan. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of the prior art, and provides an axial fan with combined fan blades to solve the problems of large deformation amount of the fan blade, low air supply efficiency and rotating vibration caused by the unbalance of the impeller when the rotating speed of the impeller is high in the prior art.

[0005] The utility model provides an axial fan with combined fan blades, which comprises a shell, a motor support is fixedly arranged on the air inlet side of the shell, a motor is fixedly arranged at the shaft center of the motor support, a flange structure is used to fixedly connect an impeller at the shaft end of the output shaft of the motor, the impeller comprises a plurality of independent fan blades, and the plurality of fan blades are uniformly fixed on the circumference of the flange structure.

[0006] Further, the fixed end of the fan blade has a hub, and the hubs of the plurality of fan blades are butted and fixed on the flange structure.

[0007] Further, the flange structure comprises a flange shaft sleeve fixedly connected with the shaft end of the output shaft of the motor and a flange plate fixed on the flange shaft sleeve, and the hubs of the plurality of fan blades are circumferentially distributed and fixed on the flange plate.

[0008] Further, the hub is provided with a positioning column, which is positioned with a positioning hole on the flange plate.

[0009] In the embodiment of the utility model, the fan blade reinforcing structure comprises a reinforcing rib and a fixing column, wherein one end of the reinforcing rib is integrally connected with the front surface of the blade of the fan blade, and the other end is fixedly connected with the fixing column; the fixing column is fixedly connected with the fixing groove at the back surface of the blade of the adjacent fan blade.

[0010] Further, the reinforcing rib is in the shape of an arc, and is concentric with the flange structure.

[0011] Further, the two ends of the fan blade reinforcing structure are respectively located at the radial middle part of the adjacent two fan blades or the position close to the blade tip of the fan blade.

[0012] Further, the periphery of the shell is fixedly provided with a fixing structure for fixedly connecting an external fixing member.

[0013] In the embodiment of the utility model, the air outlet side of the shell is provided with a fairing; a plurality of flow guide ribs are uniformly arranged in the circumferential direction of the fairing, and the flow guide ribs extend outward from the shaft center in the radial direction.

[0014] In another embodiment, the air outlet side of the shell is provided with an air valve.

[0015] According to the above embodiment, the axial flow fan with the combined fan blade has at least the following advantages: the adjacent fan blades of the axial flow fan are connected through the blade reinforcing rib, the deformation of the fan blade caused by centrifugal force and air flow resistance during rotation of the impeller is reduced, the air supply efficiency is ensured to reach the design value, and the air supply amount is improved.

[0016] The impeller of the axial flow fan is assembled by the split fan blades, and the same mold is used for producing the fan blades, so that the weight deviation error between the fan blades is reduced, and the vibration caused by the gravity deviation of the assembled impeller during rotation is smaller.

[0017] In addition, a plurality of fan blades are produced by one fan blade mold, and the plurality of fan blades are assembled into an impeller, so that the cost of producing the impeller by the mold of the entire impeller is lower. When one fan blade is damaged, the fan blade can be replaced, and the entire impeller does not need to be replaced, so that the maintenance cost is lower.

[0018] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] The following drawings form part of the specification. Together with the description, they serve to explain the principles of the application.

[0020] Figure 1 A sectional view of the axial flow fan with combined fan blades according to the present application.

[0021] Figure 2 A rear view of the axial flow fan with combined fan blades according to the present application.

[0022] Figure 3 A perspective view of the axial flow fan with combined fan blades according to the present application.

[0023] Figure 4 A perspective view of the axial flow fan with combined fan blades according to the present application.

[0024] Figure 5 A perspective view of the axial flow fan with combined fan blades according to the present application.

[0025] Figure 6 A perspective view of the axial flow fan with combined fan blades according to the present application.

[0026] Figure 7 A rear view of the axial flow fan with combined fan blades according to the present application.

[0027] Figure 8 A sectional view of the axial flow fan with combined fan blades according to the present application.

[0028] Figure 9 A sectional view of the axial flow fan with combined fan blades according to the present application.

[0029] Figure 10 A sectional view of the axial flow fan with combined fan blades according to the present application.

[0030] Figure 11 A sectional view of the axial flow fan with combined fan blades according to the present application.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 1 - housing, 2 - motor support, 3 - motor, 4 - flange structure, 5 - impeller, 6 - fan blade reinforcing structure, 7 - fairing, 8 - air valve

[0033] 11 - fixing structure

[0034] 41-flange shaft sleeve, 42-flange plate;

[0035] 51-fan blade, 52-hub, 53-positioning column;

[0036] 61-reinforcing rib, 62-fixing column;

[0037] 71-flow guide rib. DETAILED DESCRIPTION

[0038] The detailed description of the various exemplary embodiments of the present application should not be considered to be limiting of the present application, but merely illustrative of certain aspects, features and embodiments of the present application.

[0039] Many modifications and variations of the present application described in the specification are possible without departing from the scope or spirit of the present application, which will be apparent to those skilled in the art. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the present application. The specification and examples provided are exemplary only.

[0040] The present application provides a combined fan blade axial fan, as Figures 1-3 As shown in the structural schematic diagram of the axial fan, in the specific embodiment, the axial fan comprises: a shell 1, in the present embodiment, a motor support 2 is fixedly arranged on the air inlet side of the shell 1, and a motor 3 is fixedly arranged at the shaft center of the motor support 2. In the present embodiment, the motor support 2 is a support rod structure, four support rods are fixedly connected to the shell 1 at one end, and the other end extends perpendicularly to the axis of the shell 1 and is fixedly connected to the motor 3 at the shaft center, and the motor 3 is located at the shaft center of the shell 1.

[0041] The shaft end of the output shaft of the motor 3 is fixedly connected to an impeller 5 through a flange structure 4. As Figure 4 and 5 shown, the impeller 5 comprises a plurality of independent fan blades 51, and the plurality of fan blades 51 are uniformly fixed to the circumference of the flange structure 4.

[0042] In addition, the adjacent two fan blades 51 are connected through a fan blade reinforcing structure 6, which is used to improve the structural strength of the fan blade 51, reduce the deformation amount of the fan blade 51 during rotation, and improve the air supply efficiency and air volume.

[0043] Further, as Figure 6 shown, the fixed end of the fan blade 51 has a hub 52, and the hubs 52 of the plurality of fan blades 51 are butt-jointed and fixed to the flange structure 4.

[0044] In the present embodiment, the same mold is used for the production of each fan blade 51, which reduces the weight error between the fan blades 51 and makes the vibration caused by the gravity center deviation of the assembled impeller 5 smaller during rotation.

[0045] In addition, the plurality of fan blades 51 are produced by one fan blade mold, and the plurality of fan blades 51 are assembled into the impeller 5, so that the cost of producing the impeller relative to the mold of the whole impeller 5 is lower. When one of the fan blades 51 is damaged, the fan blade 51 can be replaced, and the whole impeller 5 does not need to be replaced, so that the maintenance cost is lower.

[0046] In the specific embodiment of the utility model, as shown in the figure, Figure 5 The flange structure 4 includes a flange shaft sleeve 41 fixedly connected with the shaft end of the output shaft of the motor 3 and a flange plate 42 fixed on the flange shaft sleeve 41.

[0047] The hubs 52 of the plurality of fan blades 51 are fixedly arranged on the flange plate 42 in a circumferential shape. The hubs 52 are provided with fixing holes corresponding to the fixing holes on the flange plate 42. In this embodiment, there are two flange plates 42 above and below, the two flange plates 42 sandwich the hubs 52, and the hubs 52 are fixed by fixing members, so that the flange plate 41 and the hubs 52 are fixedly connected together. At the same time, the two flange plates 42 are also fixedly connected with the fixing ring on the flange shaft sleeve 41.

[0048] Further, the hubs 52 are provided with positioning columns 53, and the positioning columns 53 are positioned in cooperation with the positioning holes on the flange plate 42.

[0049] In addition, the fixing ring of the flange shaft sleeve 41 is also provided with a limiting column, and the flange plate 42 is provided with a limiting hole corresponding to the position of the limiting column, and the limiting column cooperates with the limiting hole to install and position and limit the relative rotation of the flange shaft sleeve 41 and the flange plate 42.

[0050] In the specific embodiment of the utility model, as shown in the figure, Figure 6 The fan blade reinforcing structure 6 includes a reinforcing rib 61 and a fixed column 62. One end of the reinforcing rib 61 is integrally connected with the blade front surface of the fan blade 51, and the other end is fixedly connected with the fixed column 62. The reinforcing rib 61 extends forward from the blade front surface of the fan blade 51 along the rotation direction of the fan blade 51, and the extension path is in an arc shape.

[0051] In addition, along the rotation direction of the impeller 5, the fixed column 62 is fixedly connected with the fixing groove at the back surface of the blade of the adjacent fan blade 51, and is fixed on the fixing groove by a screw or the like fixing member.

[0052] In this embodiment, the reinforcing rib 61 is in an arc-shaped sheet structure and is concentric with the flange structure 4. The width direction of the reinforcing rib 61 is the same as the axial direction of the impeller 5, so that the resistance to airflow can be reduced. After the plurality of fan blades 51 are combined into the impeller 5, the plurality of reinforcing ribs 61 are in a circular structure, so that the strength of the fan blade structure is improved while the air resistance caused by the reinforcing ribs is reduced as much as possible.

[0053] Furthermore, both ends of the blade reinforcement structure 6 are respectively located at the radial middle positions of two adjacent blades 51 or close to the blade tips of the blades 51 .

[0054] In the specific embodiment of the present invention, a fixing structure 11 for fixing and connecting an external fixing member is fixedly provided around the periphery of the housing 1. In this embodiment, the outer ring of the housing 1 is an octagonal structure, and the fixing structure 11 is a fixing connecting piece evenly distributed at the outer edge of the housing 1.

[0055] In a specific embodiment of the present invention, a fairing 7 is provided on the air outlet side of the housing 1. A plurality of guide ribs 71 are evenly arranged around the circumference of the fairing 7, extending radially outward from the axis. These ribs 71 extend radially outward from the axis in an arc-shaped path, and are used to adjust the direction of the airflow, reduce turbulence, and increase the airflow velocity.

[0056] Figure 7 The figure shows the structure of the second embodiment of the axial flow fan with combined fan blades provided by the present invention. Figure 1 The difference of the embodiment shown is that, in this embodiment, the motor bracket 2 is rotated 45 degrees for fixed installation compared with the embodiment 1. In addition, the air outlet side of the housing 1 is not provided with a fairing 7, thereby reducing the resistance of the fairing 7 to the airflow.

[0057] Figures 8-11 The figure shows the structure of the third embodiment of the axial flow fan with combined blades provided by the present invention. Figure 7 The difference between the illustrated embodiment and the illustrated embodiment is that, in this embodiment, a damper 8 is provided on the air outlet side of the housing 1 to seal the air outlet. When the air pressure reaches a certain value, the airflow pushes the damper 8 open and flows out. In this embodiment, the damper cover on the damper 8 opens from the bottom to the top. Preferably, the damper is a louver damper.

[0058] Figure 8 and Figure 9 This is the diagram of the air valve 8 in the closed state. Figure 10 and Figure 11 This is the diagram of the air valve opening state.

[0059] The above description is only an illustrative embodiment of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. An axial flow fan with combined fan blades, characterized in that: The axial flow fan comprises: a housing (1); a motor bracket (2) is fixedly provided on the air inlet side of the housing (1); a motor (3) is fixedly provided at the axis of the motor bracket (2); the shaft end of the output shaft of the motor (3) is fixedly connected to an impeller (5) via a flange structure (4); the impeller (5) comprises a plurality of independent blades (51); and the plurality of blades (51) are evenly fixed on the circumference of the flange structure (4); Two adjacent blades (51) are connected via a blade reinforcement structure (6) to improve the structural strength of the blades (51).

2. The axial flow fan with combined fan blades according to claim 1, characterized in that: The fixed end of the fan blade (51) has a hub (52), and the hubs (52) of a plurality of the fan blades (51) are butt-jointed and fixed on the flange structure (4).

3. The axial flow fan with combined fan blades according to claim 2, characterized in that: The flange structure (4) comprises a flange sleeve (41) fixedly connected to the shaft end of the output shaft of the motor (3) and a flange plate (42) fixed on the flange sleeve (41); The hubs (52) of the plurality of blades (51) are distributed in a circumferential shape and fixed on the flange (42).

4. The axial flow fan with combined fan blades according to claim 3, characterized in that: The hub (52) is provided with a positioning column (53), and the positioning column (53) cooperates with the positioning hole on the flange (42) for positioning.

5. The axial flow fan with combined fan blades according to claim 1, characterized in that: The fan blade reinforcement structure (6) includes a reinforcement rib (61) and a fixing column (62), wherein: One end of the reinforcing rib (61) is integrally connected to the front face of the blade (51), and the other end is fixedly connected to the fixing column (62); The fixing column (62) is fixedly connected to the fixing groove on the back side of the adjacent fan blade (51).

6. The axial flow fan with combined fan blades according to claim 5, characterized in that: The reinforcing rib (61) is an arc-shaped sheet structure and is concentric with the flange structure (4).

7. The axial flow fan with combined fan blades according to claim 5, characterized in that: The two ends of the blade reinforcement structure (6) are respectively located at the radial middle positions of two adjacent blades (51) or at positions close to the blade tips of the blades (51).

8. The axial flow fan with combined fan blades according to any one of claims 1 to 7, characterized in that: A fixing structure (11) for fixedly connecting to an external fixing member is fixedly provided on the periphery of the housing (1).

9. The axial flow fan with combined fan blades according to any one of claims 1 to 7, characterized in that: A fairing (7) is provided on the air outlet side of the housing (1); A plurality of guide ribs (71) are evenly arranged in the circumferential direction of the fairing (7), and the guide ribs (71) extend outward from the axis in the radial direction.

10. The axial flow fan with combined fan blades according to any one of claims 1 to 7, characterized in that: An air valve (8) is provided on the air outlet side of the housing (1).

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