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Axial flow fan with blade suction surfaces having vortex breaking structures and with grooves formed in blade tops

A suction surface and blade technology, applied in the field of axial flow fans, can solve problems such as exhaust noise

Active Publication Date: 2016-07-13
嘉兴笼列电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the fan outlet is directly discharged into the atmosphere, there will be exhaust noise

Method used

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  • Axial flow fan with blade suction surfaces having vortex breaking structures and with grooves formed in blade tops
  • Axial flow fan with blade suction surfaces having vortex breaking structures and with grooves formed in blade tops
  • Axial flow fan with blade suction surfaces having vortex breaking structures and with grooves formed in blade tops

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like figure 1 As shown, the axial flow fan consists of 7 parts, including 1. impeller, 2. guide vane, 3. outer cylinder, 4. inner cylinder, 5. motor, 6. shaft sleeve, 7. net cover; outer cylinder 3, The guide vane 2 and the inner cylinder 4 are fixed together by welding, and the motor 5 is fixed on the web of the inner cylinder 4, wherein the working parameters of the motor 5 are 720r / min, and the power is 4KW; the impeller 1 is fixed on the motor through the sleeve 6 On the 5th axis, the gap between the hub of the impeller 1 and the inner cylinder 4 is 10mm; the net cover 7 is installed on the outer cylinder 3, and has the functions of rectifying and preventing foreign matter from entering.

[0023] like figure 1 , 3 As shown, the impeller 1 is driven by the motor 5 to do work for the gas to increase the dynamic pressure and static pressure o...

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Abstract

The invention discloses an axial flow fan with blade suction surfaces having vortex breaking structures and with grooves formed in blade tops. The vortex breaking structures are additionally arranged on the portions, close to roots, of the suction surfaces of blades of an impeller, the airfoil grooves are machined in the tops of the blades, a labyrinth seal structure is additionally arranged in the clearance between a hub and an inner barrel, rectangular grooves are machined in the tails of the suction surfaces of guide vanes, the size of channel vortexes in an impeller passenger can be restrained, and radial secondary flow is reduced. Development of leakage flow can be impeded, mixing of the leakage flow and main flow is weakened, and therefore leakage losses of the blade tops are reduced. A high throttling effect can be generated, the stability of airflow on an outlet of the impeller is improved, and the leakage amount of airflow at the roots of the blades is reduced. The thicknesses of boundary layers on the tails of the guide vanes can be well controlled, separation of the boundary layers is avoided, disengagement of the vortexes is restrained, and the disengaging frequency of the vortexes is reduced. By improving different positions of the axial flow fan, the axial flow fan is higher in efficiency, lower in noise and more environmentally friendly and saves more energy.

Description

technical field [0001] The invention belongs to the technical field of axial flow fans, and in particular relates to an axial flow fan with a vortex breaking structure on the blade suction surface and grooves on the top of the blade. Background technique [0002] The axial flow fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances ; Grain drying and selection; wind tunnel wind source and hovercraft inflation propulsion, etc., have very important applications in various industries of the national economy. According to statistics, the power consumption of fans accounts for about 10% of the country's power generation, and the average power consu...

Claims

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Application Information

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IPC IPC(8): F04D29/38F04D29/66
CPCF04D29/388F04D29/667
Inventor 窦华书李哲弘徐金秋许文倩贾会霞姜陈锋迟劭卿陈小平魏义坤杨徽
Owner 嘉兴笼列电子商务有限公司
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