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An axial flow fan with a vortex breaking structure on the suction surface of the blade and grooves on the top of the blade

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

Active Publication Date: 2017-12-12
桐乡市织盟知识产权运营有限公司
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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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  • An axial flow fan with a vortex breaking structure on the suction surface of the blade and grooves on the top of the blade
  • An axial flow fan with a vortex breaking structure on the suction surface of the blade and grooves on the top of the blade
  • An axial flow fan with a vortex breaking structure on the suction surface of the blade and grooves on the top of the blade

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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 a vortex breaking structure on the suction surface of the blade and grooves on the top of the blade. A vortex breaking structure is added on the suction surface of the impeller blade near the root, and an airfoil groove is processed on the top of the blade. The gap with the inner cylinder is equipped with a labyrinth seal structure, and the tail of the suction surface of the guide vane is processed with a rectangular groove, which can suppress the size of the channel vortex in the impeller flow channel and reduce the radial secondary flow; it can hinder the development of the leakage flow and weaken the leakage The mixing of flow and main flow can reduce the leakage loss at the tip of the blade; it can produce a strong throttling effect, improve the stability of the air flow at the outlet of the impeller, and reduce the leakage of the air flow at the root of the blade; it can well control the guide vane The thickness of the aft boundary layer prevents boundary layer separation, suppresses vortex shedding and reduces the frequency of vortex shedding. Through the improvement of different positions of the axial flow fan, the efficiency of this type of axial flow fan is higher, the noise is lower, and it is more energy-saving and environmentally friendly.

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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Patent Type & Authority Patents(China)
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 桐乡市织盟知识产权运营有限公司
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