Axial fan wheel hub structure

Abstract

The utility model discloses an axial flow fan wheel hub structure, including the wheel hub and a plurality of blade fixed on the wheel hub, the wheel hub is by a plurality of with blade one -to -one corresponding connecting portion constitutes, and the one end of a plurality of connecting portions is integrally connected, and the other end of connecting portion is fixedly connected with corresponding blade, and all be equipped with through -hole on each connecting portion. The utility model discloses through to the wheel hub structure of axial flow fan improvement, the wheel hub of the existing circular whole structure is improved to constitute by a plurality of connecting portions, and there is gap space between the adjacent connecting portion, and all be equipped with through -hole on each connecting portion, and therefore compared with the existing circular solid wheel hub can effectively save material cost, and can reduce the overall weight of wheel hub, and compared with the existing circular whole wheel hub, the utility model uses a plurality of connecting portion and blade form one -to -one corresponding connection relation, and the connecting area between blade root and wheel hub remains unchanged, therefore will not reduce the connecting strength between blade and wheel hub.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, and in particular to an axial flow fan hub structure. Background Technology

[0002] Axial fans are key moving components in air conditioning outdoor unit systems. They accelerate heat exchange efficiency in the outdoor unit's heat exchanger, thus directly impacting the overall performance of the air conditioner. The hub of the axial fan connects the blades to the motor shaft. Currently, most axial fan hubs are solid, circular structures. If the hub diameter is too large, it can lead to higher design costs and lower blade operating efficiency; conversely, if the hub diameter is too small, the connection between the blades and the hub may be insufficiently strong. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an axial fan hub structure that can effectively reduce production costs and improve the operating efficiency of axial fans while ensuring the connection strength of the blades.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an axial flow fan hub structure, including a hub and multiple blades fixed on the hub. The hub is composed of multiple connecting parts that correspond one-to-one with the blades. One end of the multiple connecting parts is integrally connected, and the other end of the connecting parts is fixedly connected to the corresponding blades. Each connecting part is provided with a through hole.

[0005] As an improvement to the above solution: the through hole is a circular through hole, an elliptical through hole, or a polygonal through hole.

[0006] As an improvement to the above solution: the through hole is a polygonal through hole, with rounded transitions between the sides of the polygonal through hole.

[0007] As an improvement to the above solution, the opening edges of the through holes are all chamfered to form arc edges.

[0008] As an improvement to the above solution: the sum of the areas of the through holes is 60% of the hub area.

[0009] As an improvement to the above solution: the part of the connecting part near the blade and the part where the connecting parts intersect are both solid structures, while the parts of the connecting part located on both sides of the through hole are hollow structures.

[0010] As an improvement to the above solution: multiple reinforcing support rods are fixedly installed inside the hollow structure of the connecting part.

[0011] As an improvement to the above solution: the reinforcing support rod extends from the solid structure near the intersection of the connecting parts to the solid structure near the blade within the hollow structure of the connecting part, and multiple reinforcing support rods are arranged at intervals in the thickness direction of the hub.

[0012] The beneficial effects of this utility model are as follows: By improving the hub structure of the axial flow fan, this utility model transforms the existing circular integral hub into one composed of multiple connecting parts with gaps between adjacent connecting parts and through holes on each connecting part. Therefore, compared with the existing solid circular hub, it can effectively save material costs and reduce the overall weight of the hub. Furthermore, compared with the existing circular integral hub, this utility model uses multiple connecting parts to form a one-to-one connection relationship with the blades, and the connection area between the blade root and the hub remains unchanged, thus not reducing the connection strength between the blade and the hub. Attached Figure Description

[0013] Figure 1 This is a front structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear structure of this utility model.

[0014] The markings in the diagram are: 100-hub, 200-blade, 300-connector, 310-through hole. Detailed Implementation

[0015] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0016] In the description of this utility model, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figure 1 and Figure 2 As shown, the axial flow fan hub structure disclosed in this utility model consists of a hub 100 and blades 200 mounted and fixed on the hub 100; the hub 100 is used to fix the blades 200 and is connected to the motor shaft that drives the axial flow fan to rotate, and the motor drives the hub 100 and the blades 200 on the hub 100 to rotate through the motor shaft.

[0018] Specifically, this invention improves the structure of the hub 100 by modifying the existing circular integral hub into one composed of multiple connecting parts 300. The number of connecting parts 300 is determined by the number of blades 200 installed. For example, in this invention, three blades 200 are used, corresponding to three connecting parts 300, ensuring a one-to-one correspondence between the connecting parts 300 and the blades 200. One end of each connecting part 300 intersects and is fixedly connected, forming a ring arrangement. The intersection point of the connecting parts 300 is concentric with the ring-shaped blades 200, meaning the circle formed by the connecting parts 300 is concentric with the circle formed by the blades 200. The other end of each connecting part 300 is fixedly connected to its corresponding blade 200.

[0019] This invention improves the structure of the hub 100, essentially eliminating the portion of the hub structure located between adjacent blades 200 from the existing circular hub. The circle formed by the connecting part 300 is essentially equivalent to the outer circumference of the existing circular hub. The intersecting ends of the connecting parts 300 are fixedly connected to form a circular structure with a diameter smaller than that of the existing hub. Furthermore, this invention provides through holes 310 on each connecting part 300, with the through holes 310 penetrating the connecting part 300 along its thickness direction. By providing through holes 310 on the connecting parts 300, the material of the entire hub 100 can be effectively saved. For example, when three connecting parts 300 are used in this invention, three through holes 310 are correspondingly provided. The material removed by the through holes 310 is greater than 60% of the material at the center of the hub 100, i.e., greater than 60% of the material at the intersecting parts of the connecting parts 300. This invention employs a hub 100 composed of multiple intersecting connecting parts 300, with through holes 310 provided on each connecting part 300. This effectively reduces the volume and weight of the entire hub 100 compared to existing solid circular hubs. While the connection between the blades 200 and the hub 100 remains unchanged compared to existing circular hubs, the portion of the hub 100 located between adjacent blades 200 is omitted. This omitted portion does not have a direct connection to the blades 200. Therefore, the contact area between the blades 200 and the connecting parts 300 in this invention is not reduced compared to existing hubs with a single circular structure, effectively maintaining the strength of the connection between the blades 200 and the hub 100. Furthermore, to improve the overall strength of the hub 100 and reduce production costs, the multiple connecting parts 300 adopt an integrated structure.

[0020] like Figure 1 and Figure 2As shown, the shape of the through hole 310 provided on the connecting part 300 is not limited in this utility model. The shape of the through hole 310 can be circular, elliptical, or polygonal, where polygonal refers to shapes such as triangle, quadrilateral, and pentagon. As a preferred embodiment, the shape of the through hole 310 can be set as a polygon, and the transition points of each side of the polygonal through hole and the opening edges at both ends of the polygonal through hole are chamfered to make the transitions between each side of the polygonal through hole rounded, and to form arc edges at the opening edges at both ends of the polygonal through hole.

[0021] Based on the through hole 310 provided in the connecting part 300, this utility model further optimizes the structure of the connecting part 300. The portion of the connecting part 300 near the blade 200 and the portions where the connecting parts 300 intersect are both made into solid structures, while the portions of the connecting part 300 on both sides of the through hole 310 are made into hollow structures. This structural improvement further saves material in the hub 100 and ensures the strength of the connection between the blade 200 and the connecting part 300, as well as the intersections of the connecting parts 300. Furthermore, multiple reinforcing support rods can be fixedly installed within the hollow structure of the connecting part 300 to support and strengthen the hollow portion within the connecting part 300. These reinforcing support rods extend from the solid structure near the intersection of the connecting parts 300 to the solid structure near the blade 200 within the hollow structure of the connecting part 300, and are spaced apart along the thickness direction of the hub 100 to improve the uniformity of force distribution.

Claims

1. An axial flow fan hub structure, comprising a hub (100) and a plurality of blades (200) fixed on the hub (100), characterized in that: The hub (100) is composed of multiple connecting parts (300) that correspond one-to-one with the blades (200). One end of each connecting part (300) is integrally connected, and the other end of the connecting part (300) is fixedly connected to the corresponding blade (200). Each connecting part (300) is provided with a through hole (310).

2. The axial fan hub structure as described in claim 1, characterized in that: The through hole (310) can be a circular through hole, an elliptical through hole, or a polygonal through hole.

3. The axial fan hub structure as described in claim 2, characterized in that: The through hole (310) is a polygonal through hole with rounded transitions between the sides.

4. The axial fan hub structure as described in claim 2, characterized in that: The opening edges of the through holes (310) are all chamfered to form arc edges.

5. The axial fan hub structure as described in claim 1, characterized in that: The sum of the areas of the through holes (310) is greater than 60% of the area of ​​the center part of the hub (100).

6. The axial fan hub structure as described in claim 1, characterized in that: The portion of the connecting part (300) near the blade (200) and the portion where the connecting parts (300) intersect are solid structures, while the portion of the connecting part (300) located on both sides of the through hole (310) is a hollow structure.

7. The axial fan hub structure as described in claim 6, characterized in that: Multiple reinforcing support rods are fixedly installed inside the hollow structure of the connecting part (300).

8. The axial fan hub structure as described in claim 7, characterized in that: The reinforcing support rod extends from the solid structure near the intersection of the connecting part (300) to the solid structure near the blade (200) within the hollow structure of the connecting part (300), and multiple reinforcing support rods are spaced apart in the thickness direction of the hub (100).

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