Flow guiding device for large axial flow fan

A technology of axial flow fan and guide device, which is applied to the components of pumping device for elastic fluid, mechanical equipment, machine/engine, etc., can solve the problems of gas effective dynamic pressure reduction, life reduction, Karman vortex street, etc. , to achieve the effect of small loss along the way, small vibration of the whole machine, and improved overall efficiency

Pending Publication Date: 2018-05-29
WOLONG ELECTRIC GRP CO LTD +1
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  • Abstract
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Problems solved by technology

When the gas inside the fan flows, the impact on the obstacle will cause the flow direction to change, resulting in a decrease in the effective dynamic pressure of the gas and an increase i

Method used

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  • Flow guiding device for large axial flow fan

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[0016] Such as figure 1 As shown, the flow guide device of the present invention is suitable for large-scale axial flow fans, and is mainly composed of three parts: the air inlet section, the flow guide section and the main engine section. Among them, the air inlet section includes an air inlet 1 and a wind hood 2. The guide section includes a guide tube outer air tube 3, an inner cone tube 4 and a rectifying cover 5. The guide tube outer wind tube 3 is connected with the wind hood 2, and the inner cone tube 4 is located inside the guide tube outer wind tube 3, The rectifying cover 5 is opposite to the front end of the inner cone 4. The main engine section includes an impeller motor 10, an external air cylinder 6 of the main engine, and an internal air cylinder 7 of the main engine.

[0017] Different from the prior art, the diversion section of this application is also provided with a first airfoil support 8 for connecting the outer wind tube 3 and the inner cone 4 of the dive...

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Abstract

The invention provides a flow guiding device for a large axial flow fan. The flow guiding device is sequentially composed of an air inlet section, a flow guiding section and a main machine section; the air inlet section comprises an air inlet and an air cover; the flow guiding section comprises a flow guiding cylinder outer air cylinder, an inner cone cylinder and a rectifying cover which is in butt joint with the front end of the inner cone cylinder; the main machine section comprises an impeller motor, a main machine outer air cylinder connected with the flow guiding cylinder outer air cylinder and a main machine inner air cylinder connected with the inner cone cylinder; the flow guiding section further comprises a first wing-shaped supporting piece which is used for connecting the flowguiding cylinder outer air cylinder and the inner cone cylinder; and the main machine section further comprises a second wing-shaped supporting piece which is used for connecting the main machine outer air cylinder and the main machine inner air cylinder. According to the device, a wing-shaped flow guiding structure is adopted, so that the generation of Karman vortex street is prevented, the pneumatic efficiency of a fan is improved, the ventilation effect is good, the efficiency is high, and the vibration is low; and meanwhile, the rigidity and the strength of the fan are enhanced, the requirement for safe and reliable operation of the fan is met, and the heat dissipation effect of the impeller motor is improved.

Description

technical field [0001] The invention relates to the field of fan technology, in particular to a flow guiding device for a large axial flow fan, which can prevent the generation of Karman vortex street. Background technique [0002] Fans are mainly used for ventilation in various places. Large capacity, high efficiency and low noise are the development direction of fan technology. The main features of large-capacity, high-efficiency, low-noise fans are large air volume and pressure, small vibration, low loss along the way, and the efficiency per unit volume is 1.1-1.2 times that of ordinary fans. Therefore, how to increase the air volume and pressure of the fan, reduce vibration, and reduce loss along the way is the primary research topic. [0003] The flow guide device of a large axial flow fan has a great influence on the efficiency, structure, aerodynamic performance, vibration and maintenance of the entire fan. When the gas inside the fan flows, it will change the flow ...

Claims

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Application Information

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IPC IPC(8): F04D29/54F04D29/58F04D29/66
CPCF04D29/541F04D29/545F04D29/5806F04D29/667
Inventor 包猛赵强赵现伟蔡合超王晓俊郭林胡士建蒙磊
Owner WOLONG ELECTRIC GRP CO LTD
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