O-shaped reinforcing rib vane disc through-flow fan blade

Abstract

The utility model provides a kind of O type reinforcing rib vane disc cross-flow fan blade, including two groups of vane disc, the middle part of two groups of vane disc is evenly distributed with several groups of fan blade at equal intervals, two groups of vane disc and several groups of fan blade form cross-flow fan blade, the surface of vane disc is provided with reinforcing rib structure;Reinforcing rib structure on the surface of vane disc is evenly transmitted to vane disc by annular continuous structure, significantly reduce the stress concentration of vane disc, thereby reduce the probability of vane disc fatigue cracking, improve the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of cross-flow fan blade technology, specifically to an O-shaped reinforced bladed cross-flow fan blade. Background Technology

[0002] A cross-flow fan (also called a "cross-flow impeller") is a cylindrical multi-bladed impeller that directly converts the mechanical energy input from a motor into a "flat, horizontal, high-volume, low-pressure" airflow. A cross-flow fan is a cylindrical multi-bladed impeller composed of multiple stacked disc-shaped "middle sections". Each section has multiple thin-walled arc-shaped blades on the front and a circular disc on the back.

[0003] In existing technologies, annular bladed disks are typically formed along the injection molding direction, resulting in excessive stress concentration and uneven stress distribution along the circumference. Under high-speed operation, the blades are prone to cracking along the disk direction, which further generates noise and shortens the blade's service life. Therefore, we propose an O-shaped reinforced bladed disk cross-flow fan to solve these problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an O-shaped reinforced bladed disk cross-flow fan blade, comprising two sets of bladed disks, with several sets of fan blades evenly distributed at equal intervals in the middle of the two sets of bladed disks, the two sets of bladed disks and the several sets of fan blades forming a cross-flow fan blade, and the surface of the bladed disks being provided with a reinforcing rib structure.

[0005] Preferably, the reinforcing rib structure includes an outer O-shaped reinforcing rib and an inner O-shaped reinforcing rib, wherein the outer O-shaped reinforcing rib is disposed on the outer side of the impeller surface and the inner O-shaped reinforcing rib is disposed on the inner side of the impeller surface.

[0006] Preferably, the surface of the O-shaped outer reinforcing rib is provided with a plurality of triangular lugs, which are distributed in a ring at equal intervals.

[0007] Preferably, a fixing hoop is provided between two adjacent sets of cross-flow fan blades, and the fixing hoop is provided on the surface of the two sets of blade disks.

[0008] Preferably, an auxiliary fixing structure is provided on one side of the surface of the two sets of impellers. The auxiliary fixing structure includes a limiting ring and a limiting groove. The limiting ring is located in the middle of one side of one set of impellers, and the limiting groove is located in the middle of one side of the other set of impellers.

[0009] Preferably, the surface of the limiting ring is in close contact with the inner wall of the limiting groove, and the end of the limiting ring away from the impeller is chamfered.

[0010] The beneficial effects of this utility model are:

[0011] In this invention, several sets of fan blades are evenly distributed at equal intervals in the middle of two sets of bladed disks. The two sets of bladed disks and the sets of fan blades form a cross-flow fan. The surface of each bladed disk is provided with a reinforcing rib structure. The reinforcing rib structure includes an outer O-shaped reinforcing rib and an inner O-shaped reinforcing rib. The outer O-shaped reinforcing rib is located on the outer side of the bladed disk surface, and the inner O-shaped reinforcing rib is located on the inner side of the bladed disk surface. The outer O-shaped reinforcing rib can hold the roots of the sets of fan blades in place, preventing the cross-flow fan from cracking along the edge of the bladed disk during operation. The inner O-shaped reinforcing rib increases the torsional stiffness at the connection between the center of the bladed disk and the output shaft, reducing the torsional angle of the cross-flow fan at startup and avoiding cracking at the center of the bladed disk. Through the cooperation of the outer and inner O-shaped reinforcing ribs, the overall stiffness of the bladed disk is improved, thereby increasing the service life of the device. At the same time, the contraction force of the outer O-shaped reinforcing rib on the outside of the bladed disk and the contraction force of the inner O-shaped reinforcing rib on the inside of the bladed disk pull against each other, thereby reducing the warpage of the bladed disk and eliminating the need for subsequent bladed disk shaping.

[0012] This invention also includes several sets of triangular lugs, fixing hoops, limiting rings, and limiting grooves. The cooperation of these triangular lugs blocks cracks generated by the device, forcing them to bend and pass through the dense fiber area of ​​the lugs or around their edges, thus extending the crack path and preventing it from extending straight towards the center of the impeller along the radial tensile stress direction. The fixing hoops connect adjacent sets of cross-flow fan blades, allowing the torque of the external motor to be transmitted to the distant cross-flow fan blades via the impeller, preventing slippage of the distant blades. The fixing hoops also increase the sealing between two sets of adjacent cross-flow fan blades, preventing axial leakage of airflow and increasing airflow. When connecting two sets of adjacent cross-flow fan blades, the limiting ring of one set is inserted into the limiting groove of the other set. The cooperation between the limiting ring and the limiting groove positions the connection between the two sets of cross-flow fan blades, ensuring that the axes of the two sets are aligned, eliminating the need for subsequent straightening steps. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a partial structural schematic diagram of the present invention;

[0015] Figure 3 This is a partial structural schematic diagram of the present invention;

[0016] Figure 4 This is a partial structural schematic diagram of the present invention.

[0017] In the diagram: 1. Blade disk; 2. Fan blade; 3. Reinforcing rib structure; 31. O-shaped outer reinforcing rib; 32. O-shaped inner reinforcing rib; 4. Triangular lug; 5. Fixing hoop; 6. Auxiliary fixing structure; 61. Limiting ring; 62. Limiting groove. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely one embodiment of this utility model, and not all embodiments. Based on this embodiment, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Specific embodiments are as follows:

[0019] A type of O-shaped reinforced bladed disc cross-flow fan blade, such as Figures 1-4 It includes two sets of bladed disks 1, and several sets of fan blades 2 are evenly distributed at equal intervals in the middle of the two sets of bladed disks 1. The two sets of bladed disks 1 and the several sets of fan blades 2 form a cross-flow fan blade. The surface of the bladed disk 1 is provided with a reinforcing rib structure 3. The reinforcing rib structure 3 on the surface of the bladed disk 1 evenly transfers the load to the bladed disk 1 through a continuous annular structure, which significantly reduces the stress concentration of the bladed disk 1, thereby reducing the probability of fatigue cracking of the bladed disk 1 and improving the service life of the device.

[0020] The reinforcing rib structure 3 includes an outer O-shaped reinforcing rib 31 and an inner O-shaped reinforcing rib 32. The outer O-shaped reinforcing rib 31 is located on the outer surface of the impeller 1, and the inner O-shaped reinforcing rib 32 is located on the inner surface of the impeller 1. The outer O-shaped reinforcing rib 31 can hold the roots of several sets of blades 2 in place, preventing the cross-flow blades from cracking along the edge of the impeller 1 during operation. The inner O-shaped reinforcing rib 32 increases the torsional stiffness at the connection between the center of the impeller 1 and the output shaft, reducing the torsional angle of the cross-flow blades at startup and preventing cracking at the center of the impeller 1. Through the cooperation of the outer O-shaped reinforcing rib 31 and the inner O-shaped reinforcing rib 32, the overall stiffness of the impeller 1 is improved, thereby increasing the service life of the device. At the same time, the contraction force of the outer O-shaped reinforcing rib 31 on the outside of the impeller 1 and the contraction force of the inner O-shaped reinforcing rib 32 on the inside of the impeller 1 pull against each other, thereby reducing the warpage of the impeller 1 and eliminating the need for subsequent shaping of the impeller 1.

[0021] The surface of the O-shaped outer reinforcing rib 31 is provided with several sets of triangular lugs 4, which are distributed in a ring at equal intervals. The cooperation of the several sets of triangular lugs 4 plays a role in blocking the cracks generated by the device, forcing the cracks to bend, so that the cracks pass through the dense fiber area of ​​the triangular lugs 4 or bypass the edge of the triangular lugs 4, thus lengthening the crack path and preventing the cracks from extending in a straight line towards the center of the blade disk 1 along the radial tensile stress direction. The uniform distribution of the several sets of triangular lugs 4 makes the device more balanced as a whole, avoiding the phenomenon of sudden stiffness changes caused by the local distribution of triangular lugs 4, which would lead to new stress concentration and dynamic imbalance.

[0022] A fixing hoop 5 is installed between two adjacent sets of cross-flow fan blades. The fixing hoop 5 is set on the surface of the two sets of blade disks 1. The fixing hoop 5 can connect the two adjacent sets of cross-flow fan blades, so that the torque of the external motor can be transmitted to the cross-flow fan blades at a distance through the blade disk 1, preventing the cross-flow fan blades at a distance from slipping. The fixing hoop 5 can also increase the sealing between the two sets of adjacent cross-flow fan blades, thereby preventing axial leakage of airflow and increasing the air volume.

[0023] An auxiliary fixing structure 6 is provided on one side of the surface of each of the two sets of bladed disks 1. The auxiliary fixing structure 6 includes a limiting ring 61 and a limiting groove 62. The limiting ring 61 is located in the middle of one side of one set of bladed disks 1, and the limiting groove 62 is located in the middle of one side of the other set of bladed disks 1. When connecting two adjacent sets of cross-flow fan blades, the limiting ring 61 of one set of cross-flow fan blades is inserted into the limiting groove 62 of the other set of cross-flow fan blades. The cooperation between the limiting ring 61 and the limiting groove 62 plays a positioning role in the connection of the two sets of cross-flow fan blades, ensuring that the axis of the two sets of cross-flow fan blades is in the same straight line, eliminating the need for subsequent straightening steps.

[0024] The surface of the limiting ring 61 fits tightly against the inner wall of the limiting groove 62, and the end of the limiting ring 61 away from the impeller 1 is chamfered. The surface of the limiting ring 61 and the inner wall of the limiting groove 62 are roughened so that when the limiting ring 61 is inserted into the limiting groove 62, the limiting ring 61 and the limiting groove 62 not only play a positioning role, but also play a micro self-locking role through the friction between the limiting ring 61 and the limiting groove 62. One side of the limiting ring 61 is chamfered to reduce the area of ​​one side of the limiting ring 61, so that the limiting ring 61 automatically slides into the limiting groove 62 during the insertion process, thereby guiding the insertion of the limiting ring 61 and avoiding the need for manual visual calibration.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An O-shaped reinforced bladed disc cross-flow fan blade, characterized in that: It includes two sets of bladed disks (1), and several sets of fan blades (2) are evenly distributed at equal intervals in the middle of the two sets of bladed disks (1). The two sets of bladed disks (1) and the several sets of fan blades (2) form a cross-flow fan blade. The surface of the bladed disks (1) is provided with a reinforcing rib structure (3).

2. The O-shaped reinforced bladed disc cross-flow fan blade according to claim 1, characterized in that: The reinforcing rib structure (3) includes an O-shaped outer reinforcing rib (31) and an O-shaped inner reinforcing rib (32). The O-shaped outer reinforcing rib (31) is disposed on the outer side of the surface of the impeller (1), and the O-shaped inner reinforcing rib (32) is disposed on the inner side of the surface of the impeller (1).

3. The O-rib vane cross-flow fan blade of claim 2, wherein: The surface of the O-shaped outer reinforcing rib (31) is provided with several sets of triangular ear pieces (4), which are distributed in a ring at equal intervals.

4. The O-rib vane cross-flow fan blade of claim 1, wherein: A fixing hoop (5) is provided between two adjacent sets of cross-flow fan blades, and the fixing hoop (5) is provided on the surface of the two sets of blade disks (1).

5. The O-rib vane cross-flow fan blade of claim 1, wherein: An auxiliary fixing structure (6) is provided on one side of the surface of the two sets of impellers (1). The auxiliary fixing structure (6) includes a limiting ring (61) and a limiting groove (62). The limiting ring (61) is located in the middle of one side of one set of impellers (1), and the limiting groove (62) is located in the middle of one side of the other set of impellers (1).

6. A cross-flow impeller according to claim 5, wherein: The surface of the limiting ring (61) is in close contact with the inner wall of the limiting groove (62), and the end of the limiting ring (61) away from the impeller (1) is chamfered.

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