Reinforced axial flow fan impeller

Abstract

The utility model discloses a reinforced axial flow fan impeller which comprises a hub and blades welded on the periphery of the hub, a shaft sleeve is arranged at the axis of the hub, a flow dividing cover with an arc surface or a conical surface is arranged on the front side of the hub, the shaft sleeve and the axis of the flow dividing cover are fixed, and the periphery of the flow dividing cover and the hub are fixed into a whole. During high-speed rotation, the front side air flow can be guided through the flow dividing cover; reinforcing ribs arranged between the hub and the inner side face of the flow dividing cover or between the hub and the shaft sleeve can reinforce the inner diameter of the hub, the hub can be prevented from being torn under high-speed rotation through the reinforcing structure, and the reinforcing structure is particularly suitable for large hubs.

Description

Technical Field

[0001] The utility model belongs to the technical field of axial flow and oblique flow fan impellers, and particularly relates to a reinforced axial flow fan impeller. Background Art

[0002] In the field of ventilation equipment technology, axial flow fans and diagonal flow fans are commonly used ventilation equipment on the market, and are widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

[0003] Axial flow and diagonal flow fans are mainly composed of fan impellers, casings, motors, etc., among which the impeller is the most critical component.

[0004] In the prior art, the structure of the fan impeller assembly is as follows: the blades are evenly welded on the hub along the circumference, and the inside of the hub is generally not reinforced, which results in insufficient rigidity when rotating at high speeds and even produces noise during rotation; in actual use, due to the long-term wear of the hub mold, there will be scratches on the surface of the hub in the later stage of hub molding, and the high-strength centrifugal force generated when the impeller rotates, this centrifugal action can easily cause the hub to tear, especially for larger hubs, this problem is more obvious.

[0005] As a technician in this field, the technical problem that urgently needs to be solved is: design a reinforced axial flow fan impeller, improve its overall strength by overall reinforcement of the impeller structure, and avoid technical problems during high-speed rotation. Utility Model Content

[0006] The utility model provides a good solution to the deficiencies of the prior art. The overall strength of the impeller is improved by adding a reinforcement structure inside the hub. The center side is fixed by bolts, and the outer side is fixed to the hub by welding. This structure can effectively improve the safety of the hub and prevent the hub from being torn at the facade.

[0007] The technical solution adopted by the enhanced axial flow fan impeller to solve its technical problems is specifically:

[0008] A reinforced axial flow fan impeller comprises a hub and blades welded to the periphery of the hub, a sleeve is arranged at the axis of the hub, a splitter cover with an arc surface or a conical surface is arranged on the front side of the hub, the sleeve and the axis of the splitter cover are fixed, and the periphery of the splitter cover is fixed to the hub as a whole; reinforcing ribs are arranged between the hub and the inner side of the splitter cover or between the hub and the sleeve.

[0009] The splitter cover is a curved surface structure, and a circle of locking flange is arranged on its periphery. The locking flange is locked together with the front side of the wheel hub.

[0010] The described bushing is arranged in a T-shaped structure, and an assembly surface is provided at its front end. The assembly surface is in contact with the inner side surface of the flow dividing cover and fixed integrally thereto.

[0011] A rear-end reinforcing ring is provided on the inner side surface at the rear end of the hub. The rear-end reinforcing ring is fixedly welded to the inner diameter of the hub integrally; the reinforcing rib is arranged between the assembly surface on the bushing and the rear-end reinforcing ring.

[0012] With the above structural arrangement, compared with the prior art, the beneficial effects of the impeller of this enhanced axial-flow fan are as follows:

[0013] The impeller of this enhanced axial-flow fan includes a hub and blades welded to the periphery of the hub. A bushing is arranged at the axis center of the hub. A flow dividing cover with an arc surface or a conical surface is provided at the front side of the hub. The bushing and the flow dividing cover are fixed axially. The periphery of the flow dividing cover is fixed integrally with the hub; during high-speed rotation, the present utility model can divert the front-side air flow through the flow dividing cover; the reinforcing ribs arranged between the inner side surface of the hub and the flow dividing cover or between the hub and the bushing can achieve the reinforcement of the inner diameter of the hub. This reinforcement structure can avoid the tearing of the hub under high-speed rotation, and is particularly applicable to larger-sized hubs. Description of the Drawings

[0014] Figure 1 It is a schematic three-dimensional structure diagram of the rear side of the present utility model;

[0015] Figure 2 It is a schematic front-view structure diagram of the present utility model;

[0016] Figure 3 It is a schematic rear-view structure diagram of the present utility model;

[0017] Figure 4 It is a schematic top-view structure diagram of the present utility model;

[0018] In the drawings, 1, hub; 11, rear-end reinforcing ring; 2, blade; 3, bushing; 31, assembly surface; 4, reinforcing rib; 5, flow dividing cover; 51, locking flange. Detailed Embodiment

[0019] The following provides a detailed description of the impeller of this enhanced axial-flow fan through specific embodiments. Those who understand this technology can easily understand other advantages and effects of the impeller of this enhanced axial-flow fan from the content disclosed in this specification; it should be noted, however, that the following specific embodiments do not impose technical limitations on this technical solution. Under the guidance of the following technical solution, those skilled in the art can further extend the technology. The protection scope of the impeller of this enhanced axial-flow fan is subject to the claims.

[0020] Embodiment: As Figure 1An enhanced axial flow fan impeller shown, which includes an annular hub 1 and a plurality of blades 2 welded to the periphery of the hub 1, and the plurality of blades 2 are evenly distributed around the outer diameter of the hub 1.

[0021] A shaft sleeve 3 is provided at the axis of the hub 1, and a flow dividing cover 5 with an arc surface or a conical surface is provided on the front side of the hub 1. The shaft sleeve 3 and the flow dividing cover 5 are fixed together at the axis, and the periphery of the flow dividing cover 5 is fixed to the hub 1; to ensure the fixing strength, as Figure 2 、 4 shown, the flow dividing cover 5 is arranged in an arc surface structure, and a locking flange 51 is provided on its periphery. The locking flange 51 is locked to the front side of the hub 1 integrally, and the locking range is a circle and the locking points are evenly distributed.

[0022] Furthermore, as shown in the figure, the shaft sleeve 3 is arranged in a T-shaped structure, and an assembly surface 31 is provided at its front end. The assembly surface 31 is in contact with the inner side surface of the flow dividing cover 5 and fixed together. The fixing method here can adopt the inner side welding method, which can keep the outer side surface of the flow dividing cover 5 clean and avoid causing wind resistance during rotation.

[0023] To prevent the hub 1 and the flow dividing cover 5 from showing insufficient rigidity during high-speed rotation, the present invention is provided with reinforcing ribs 4 between the inner side surface of the hub 1 and the flow dividing cover 5 or between the hub 1 and the shaft sleeve 3. In this embodiment, reinforcing ribs 4 are provided between the hub 1 and the shaft sleeve 3. As Figure 1 shown, when reinforcing ribs 4 are provided between the hub 1 and the shaft sleeve 3, one end of the reinforcing rib 4 is connected to the assembly surface 31, and the other end is riveted to the inner side surface of the hub 1. A plurality of reinforcing ribs 4 are evenly arranged between the assembly surface 31 and the inner side surface of the hub 1 to realize the overall reinforcement of the hub.

[0024] Furthermore, a rear-end reinforcing ring 11 is provided on the inner side surface of the rear end of the hub 1, and the rear-end reinforcing ring 11 is welded and fixed to the inner diameter of the hub 1 integrally; to prevent the riveting of the reinforcing ribs 4 from damaging the hub 1, the present invention arranges the reinforcing ribs 4 between the assembly surface 31 on the shaft sleeve 3 and the rear-end reinforcing ring 11. By providing the rear-end reinforcing ring 11, it not only improves the inner side surface support strength of the entire hub 1, but also realizes the fixing of the reinforcing ribs 4.

[0025] After the present invention is provided with the above structure, during high-speed rotation, the front-side air flow can be guided by the flow dividing cover 5; reinforcing ribs 4 are provided between the inner side surface of the hub 1 and the flow dividing cover 5 or between the hub 1 and the shaft sleeve 3. Through the reinforcing ribs 4, the inner diameter of the hub 1 can be reinforced, and this reinforcing structure can avoid the tearing of the hub under high-speed rotation, especially more suitable for larger-sized hubs.

Claims

1. A reinforced axial flow fan impeller, characterized in that: it includes a hub and blades welded to the periphery of the hub, a sleeve is arranged at the axis of the hub, a diverter cover with an arc surface or a conical surface is arranged on the front side of the hub, the sleeve and the axis of the diverter cover are fixed, and the periphery of the diverter cover is fixed to the hub as a whole; reinforcing ribs are arranged between the hub and the inner side of the diverter cover or between the hub and the sleeve.

2. The reinforced axial flow fan impeller according to claim 1, characterized in that: The splitter cover is a curved surface structure, and a circle of locking flange is arranged on its periphery. The locking flange is locked together with the front side of the wheel hub.

3. The reinforced axial flow fan impeller according to claim 1, characterized in that: The shaft sleeve is arranged in a T-shaped structure, and an assembly surface is arranged at the front end thereof. The assembly surface contacts and is fixed to the inner side surface of the diverter cover.

4. The reinforced axial flow fan impeller according to claim 3, characterized in that: A rear end reinforcing ring is arranged on the inner side surface of the rear end of the hub, and the rear end reinforcing ring is welded and fixed to the inner diameter of the hub; the reinforcing rib is arranged between the assembly surface on the shaft sleeve and the rear end reinforcing ring.

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