Ducted fan device with double-layer propellers

A ducted fan and propeller technology, used in propellers, transportation and packaging, aircraft parts, etc., can solve the problems of complex three-dimensional shape design of air ducts, high speed and small vibration, and achieve the effect of increasing air volume and improving airflow.

Pending Publication Date: 2021-07-09
上海建桥学院有限责任公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] Disadvantages of ducted fan propellers: Good efficiency requires a very small gap between the blade tip and the duct, the three-dimensional shape of the air duct is complex, and requires high speed and minimal vibration

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  • Ducted fan device with double-layer propellers
  • Ducted fan device with double-layer propellers

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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Abstract

The invention relates to a ducted fan device with double-layer propellers. The ducted fan device comprises a shell, a double-layer propeller blade structural body is arranged in the shell, the double-layer propeller blade structural body comprises a main shaft, double-layer propeller blades are arranged on the main shaft, an end cover is arranged at one end of the main shaft, and the other end of the main shaft is connected with a motor through a coupler. Compared with the prior art, the ducted fan device with the double-layer propellers overcomes the defect of a windless area of a traditional axial flow fan. According to the ducted fan device with the double-layer propellers, the air volume in the center of the ducted fan is concentrated through a first-layer fan, compressed air is further compressed through a second-layer fan, and therefore, the problem of the windless area is solved, meanwhile, the air volume is increased; and flow deflectors are designed, airflow can be improved, the airflow in an upper area and the airflow in a lower area do not interfere with each other, and the upper-layer airflow can be continuously transmitted to the lower layer.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a ducted fan device with double-layer propellers. Background technique [0002] Ducted fan refers to a propulsion device in which a duct is arranged on the periphery of a free propeller. At home and abroad, people began to study ducted fan propellers very early, and achieved a lot of research results, which are widely used in various vehicles, especially aircrafts. [0003] The principle of a free propeller is similar to that of an airplane wing. The motion of the propeller is decomposed into horizontal motion and rotational motion. When the propeller moves, the main resistances are air friction resistance, pressure difference resistance, induced resistance and interference resistance. Due to the high-speed circular motion of the blade, the speed at the blade tip is the highest, the induced resistance is relatively large, and the impact on the external airflow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C11/00B64C11/48
CPCB64C11/001B64C11/48
Inventor 吴玉平吴桑建
Owner 上海建桥学院有限责任公司
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