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A large-flow high-altitude axial flow fan

An axial flow fan, high flow technology, applied in the field of stratospheric airships

Active Publication Date: 2021-07-06
AERODYNAMICS NAT KEY LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the current collecting devices used in fans are all linear, arc-shaped, conical, etc., and their shapes are simple curves, such as straight lines and arcs. A large vortex zone is formed at the inlet of the collector, which is not fully aerodynamic

Method used

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  • A large-flow high-altitude axial flow fan
  • A large-flow high-altitude axial flow fan
  • A large-flow high-altitude axial flow fan

Examples

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Embodiment Construction

[0040] The present invention will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0041] figure 1 , figure 2 Shown is a large-flow high-altitude axial flow fan provided by the present invention, which includes an inner tube 1 and an outer tube 2 arranged in a coaxial gap; A fairing 4 is mounted on the extension end, and the fairing 4 is hemispherical; a lip 5 is fixedly installed on the extension end of the outer tube 2 , and the lip 5 is streamlined and everted.

[0042] The central axis of the inner tube 1 and the central axis of the outer tube 2 are on the same straight line, and an annular circulation channel is formed between the outer wall of the inner tube 1 and the inner wall of the outer tube 2; the inner tube 1 is fixed by connecting ribs Installed in the outer tube 2, specifically, one end of the connecting rib is fixed to the outer wall of the inner tube 1, and the other end of th...

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Abstract

The invention discloses a large-flow high-altitude axial flow fan, which relates to the field of stratospheric airships, and comprises an inner tube and an outer tube arranged in coaxial gaps; the installation end of the inner tube is rotatably installed with an impeller; There is a streamline cover, and the streamline cover is hemispherical; a lip edge is fixedly installed on the extension end of the outer tube, and the lip edge is streamlined and turned outward. The present invention adopts a streamlined and everted lip, so that the lip, the outer tube, and the streamline cover together form a good current collector, providing uniform inflow conditions for the impeller, so that there is no separation of the flow in the process of flowing into the fan Loss, and ultimately increase the efficiency of the overall work of the fan by 10% to 15%. The fan impeller has been designed with aerodynamic-structure multi-wheels to form a unique blade shape with a solidity of approximately 1, a long chord at the tip of the blade and a small chord at the root. The fan impeller has the characteristics of large flow in high-altitude working conditions, and is safe and economical at the same time. good.

Description

technical field [0001] The invention relates to the field of stratospheric airships, in particular to a large-flow high-altitude axial flow fan. Background technique [0002] Airships have experienced more than one hundred years of development, experienced rise, prosperity, and decline. In recent years, aviation developed countries have begun to pay attention to and redesign, manufacture and use airships after re-evaluating the role of airships in the military and civilian fields. Among them, the stratospheric (20Km above sea level) airship has broad application prospects in ground observation, air early warning, communication and other aspects. In the design of a stratospheric airship, the entire ship is divided into many airbags, and each airbag has a set of pressure control devices for controlling the internal pressure of the airship. The airship performs shape maintenance, lift control and pitch control through the pressure control system. [0003] The fan in the airs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D19/00F04D25/08F04D29/52F04D29/54F04D29/32F04D29/38F04D29/66
CPCF04D19/002F04D25/08F04D29/325F04D29/384F04D29/386F04D29/522F04D29/541F04D29/547F04D29/666F04D29/667
Inventor 宋超李伟斌王子维李鹏
Owner AERODYNAMICS NAT KEY LAB