Ultralow hub ratio type axial flow fan impeller
An axial flow fan, hub ratio technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of difficult construction of tunnel shafts, high tunnel ventilation operations, and large hubs in the fan shaft, so as to improve the efficiency of the fan. Efficiency, increasing wind flow area, increasing area effect
Pending Publication Date: 2019-11-12
上海进贤机电科技有限公司
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Problems solved by technology
[0002] With the construction of expressways entering the western plateau area, after the tunnel is opened to traffic, if the traffic flow occurs, other fans must be added to meet the changes in traffic conditions, and super-long expressway tunnels are also constantly appearing, so that the ventilation of expressway tunnels The operation is getting higher and higher, and the difficulty of tunnel shaft construction is also increasing, which further requires us to minimize the number of tunnel shafts, and the ventilation efficiency of super-large fans is getting higher and higher. At present, the wheel-to-hub ratio of super-large fan structures is greater than 0.4. As a result, the inner hub of the fan cylinder is relatively large, reducing the flow area and greatly reducing the ventilation efficiency
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[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] see Figure 1-4 , the present invention provides a technical solution: an ultra-low hub ratio axial flow fan impeller, including a hub 1 and a rotating hub cover 4, the hub 1 is the hub of the fan impeller, and the rotating hub cover 4 surfaces the side wall of the hub 1 protection, the side wall of the hub 1 is fastened with a rotating hub cap 4, the contact between the hub 1 and the rotating hub cap 4 is threadedly connected with a second hexagonal sc...
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The invention discloses an ultralow hub ratio type axial flow fan impeller. The ultralow hub ratio type axial flow fan impeller comprises a hub and a rotating hub cover. One side wall of the hub is connected with the rotating hub cover in a buckled manner. The contact portion between the hub and the rotating hub cover is connected with a second hexagon screw in a threaded manner. A second anti-loose gasket is arranged between the second hexagon screw and the rotating hub cover. The second anti-loose gasket and the second hexagon screw are connected in a sleeved manner. A cup-shaped brake mat is fixedly connected and assembled in the hub. Blades are arranged in the cup-shaped brake mat. The bottom ends of the blades are fixedly connected with and provided with locating pins. According to the ultralow hub ratio type axial flow fan impeller, by means of threaded connection between the second hexagon screw and the hub and the rotating hub cover, the rotating hub cover is installed on the hub, the blades are placed in the end opening of the hub and are attached to the cup-shaped brake mat, a hub adapter is buckled to the hub, the effect of generating high air outlet static pressure to increase wind force circulation area is achieved, and the benefit of improving the efficiency of the impeller is achieved.
Description
technical field [0001] The invention relates to the technical field of fan impellers, and the specific field is an ultra-low hub ratio axial flow fan impeller. Background technique [0002] With the construction of expressways entering the western plateau area, after the tunnel is opened to traffic, if the traffic flow occurs, other fans must be added to meet the changes in traffic conditions, and super-long expressway tunnels are also constantly appearing, so that the ventilation of expressway tunnels The operation is getting higher and higher, and the difficulty of tunnel shaft construction is also increasing, which further requires us to minimize the number of tunnel shafts, and the ventilation efficiency of super-large fans is getting higher and higher. At present, the wheel-to-hub ratio of super-large fan structures is greater than 0.4. As a result, the inner hub of the fan cylinder is relatively large, reducing the flow area and greatly reducing the ventilation efficie...
Claims
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IPC IPC(8): F04D29/32F04D29/34F04D29/64E21F1/00
CPCE21F1/003F04D29/326F04D29/329F04D29/34F04D29/64
Inventor 杜菲崔兴华闵云石小兵
Owner 上海进贤机电科技有限公司