A wedge-shaped fairing for a cross-flow fan beam

Abstract

This utility model discloses a wedge-shaped guide shroud for the crossbeam of an axial flow fan, belonging to the field of axial flow fan technology. It includes an upper and lower guide shroud blade, which are respectively fixed to the upper and lower surfaces of an I-beam. The upper and lower guide shroud blades are connected to form the guide shroud. The guide shroud has a wedge-shaped structure, with the wedge tip facing the direction of airflow. This utility model, using the above structure, provides a wedge-shaped guide shroud for the crossbeam of an axial flow fan. By adding a wedge-shaped guide shroud to the crossbeam of the axial flow fan, it significantly reduces vibration and noise generated by the excitation of the crossbeam. Furthermore, it has a simple structure, is easy to install and maintain, and is suitable for the retrofitting of existing axial flow fans.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and in particular to a wedge-shaped guide shroud for the crossbeam of an axial flow fan. Background Technology

[0002] Axial flow fans are widely used in industry, construction, and ventilation, but they often generate significant noise during operation due to frame vibration. This not only affects the service life of the equipment but also adversely impacts the working environment. In existing technologies, the frame beams of axial flow fans are typically designed with I-beams, which generate substantial excitation forces when the blades pass over them. Furthermore, their connections are mostly rigid, lacking effective vibration damping measures, resulting in significant vibration transmission and noise problems.

[0003] Specifically, existing axial flow fan frames are mostly constructed from welded I-beams or channel steel. When airflow passes over the frame, the uneven airflow distribution impacts the I-beams, causing overall frame vibration. This vibration frequency often coincides with the blade passing frequency, exacerbating the vibration effect. Furthermore, airflow easily forms vortices as it flows over the right-angled inner wall of the I-beam. These vortices impact the blades in the opposite direction, causing the blades to transmit vibration sequentially to the hub, reducer, motor, and frame, ultimately resulting in superimposed secondary vibrations. This vibration not only shortens the service life of components but also increases construction and maintenance costs.

[0004] Therefore, there is an urgent need for an improved axial flow fan frame design to effectively reduce vibration and noise, and improve equipment performance and user experience. Utility Model Content

[0005] The purpose of this invention is to provide a wedge-shaped guide shroud for the crossbeam of an axial flow fan, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a wedge-shaped shroud for the crossbeam of an axial flow fan, comprising an upper shroud blade and a lower shroud blade. The upper shroud blade and the lower shroud blade are respectively fixed to the upper and lower surfaces of an I-beam, and the upper shroud blade and the lower shroud blade are connected to form the shroud. The shroud has a wedge-shaped structure, and the wedge-shaped tip of the shroud is oriented towards the direction of airflow.

[0007] Preferably, the upper blade of the deflector is connected to the upper surface of the I-beam by welding or by a first anti-detachment bolt.

[0008] Preferably, the lower blade of the fairing is connected to the lower surface of the I-beam by welding or a second anti-detachment bolt.

[0009] Preferably, the upper vane and the lower vane of the fairing are connected by spot welding or a third anti-detachment bolt.

[0010] Preferably, the wedge-shaped surfaces of the upper and lower blades of the air deflector have gradually expanding guide slopes along the airflow direction, and the guide slopes and the surface of the I-beam form an airflow diversion space.

[0011] Therefore, the wedge-shaped guide shroud for the crossbeam of an axial flow fan, which adopts the above-mentioned structure, significantly reduces the vibration and noise generated by the excitation of the crossbeam by adding a wedge-shaped guide shroud to the crossbeam of the axial flow fan. Moreover, the structure is simple, easy to install and maintain, and suitable for the retrofitting of existing axial flow fans. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a wedge-shaped guide shroud for the crossbeam of an axial flow fan according to the present invention;

[0013] Figure 2 This is a front view of a wedge-shaped guide shroud for the crossbeam of an axial flow fan according to the present invention;

[0014] Figure 3 This is a side view of a wedge-shaped guide shroud for the crossbeam of an axial flow fan according to the present invention;

[0015] Figure 4 This is a top view of a wedge-shaped guide shroud for the crossbeam of an axial flow fan according to the present invention;

[0016] Figure 5 This is a schematic diagram of airflow diversion for a wedge-shaped guide shroud used in the crossbeam of an axial flow fan according to the present invention;

[0017] Reference numerals: 1. Upper vane of the fairing; 2. Lower vane of the fairing; 3. First anti-detachment bolt. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Example

[0021] like Figures 1-4 As shown, a wedge-shaped shroud for an axial flow fan beam includes an upper shroud blade 1 and a lower shroud blade 2. The upper shroud blade 1 and the lower shroud blade 2 are respectively fixed to the upper and lower surfaces of an I-beam. The upper shroud blade 1 is connected to the upper surface of the I-beam by welding or a first anti-detachment bolt 3, and the lower shroud blade 2 is connected to the lower surface of the I-beam by welding or a second anti-detachment bolt. This design is not only easy to install, but also suitable for the renovation of existing projects. The upper shroud blade 1 and the lower shroud blade 2 are connected by spot welding or a third anti-detachment bolt to form the shroud. The connection method can be selected according to the actual situation. Welding is preferred to ensure firmness. In places where welding is inconvenient, anti-detachment bolts are used to ensure the stability and reliability of the structure.

[0022] The deflector features a wedge-shaped design, with the wedge tip pointing towards the incoming airflow direction. This design effectively diverts high-pressure, high-speed airflow, reducing the direct impact of the airflow on the H-beam. The wedge-shaped surfaces of the upper blade 1 and lower blade 2 of the deflector have gradually expanding guide slopes along the airflow direction. These guide slopes create an airflow diversion space between the deflector and the H-beam surface. When airflow passes through the deflector, the wedge design guides it into this diversion space, effectively preventing direct impact on the H-beam beam and significantly reducing the impact. Furthermore, the wedge-shaped deflector has a compact overall structure and a split design, allowing for easy installation on existing axial flow fan beams without requiring extensive modifications to the existing equipment.

[0023] Working principle: such as Figure 5As shown, when the high-pressure, high-speed airflow reaches the guide shroud, due to the wedge-shaped design and the effect of the guide slope, the airflow is guided into the diversion space formed by the guide slope, thus avoiding the phenomenon of the airflow directly impacting the H-beam. This diversion method significantly reduces the frontal impact force of the airflow on the H-beam, reducing vibration at the source. Simultaneously, by rationally allocating the airflow path, the vibration amplitude caused by airflow impact is further reduced. This reduction in vibration not only effectively reduces noise but also extends the service life of the equipment. Traditional axial flow fans, during operation, are prone to impacting the H-beam due to uneven airflow distribution, leading to overall structural vibration. This design successfully solves this problem by introducing a wedge-shaped guide shroud.

[0024] Therefore, this utility model adopts a wedge-shaped guide shroud for the crossbeam of an axial flow fan with the above-mentioned structure. The wedge-shaped guide shroud is wrapped around the crossbeam of the fan, with the wedge facing the direction of the airflow, which diverts the high-pressure and rapid airflow, reduces its frontal impact on the crossbeam, and reduces the generation of vibration from the source.

[0025] Finally, it should be noted that the above embodiments are only preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be covered within the protection scope of the present utility model.

Claims

1. A wedge-shaped spinner for a cross-flow fan beam, characterized by: It includes an upper vane and a lower vane, which are fixed to the upper and lower surfaces of an I-beam, respectively. The upper and lower vanes are connected to form a shroud. The shroud has a wedge-shaped structure, with the wedge tip facing the direction of the incoming airflow.

2. A wedge-shaped fairing for a crossbeam of an axial fan according to claim 1, characterized in that: The upper leaf of the fairing is connected to the upper surface of the I-beam by welding or by the first anti-detachment bolt.

3. A wedge-shaped fairing for a crossbeam of an axial fan according to claim 1, characterized in that: The lower blade of the fairing is connected to the lower surface of the I-beam by welding or by a second anti-detachment bolt.

4. A wedge-shaped fairing for a crossbeam of an axial fan according to claim 1, characterized in that: The upper and lower blades of the fairing are connected by spot welding or a third anti-detachment bolt.

5. A wedge-shaped fairing for a crossbeam of an axial fan according to claim 1, characterized in that: The wedge-shaped surfaces of the upper and lower blades of the shroud have gradually expanding guide slopes along the airflow direction, and the guide slopes and the surface of the I-beam form an airflow diversion space.

Images