Counter-rotary axial fan with adjustable inlet guide vanes

A technology of imported guide vanes and axial flow fans, applied in axial flow pumps, mechanical equipment, machines/engines, etc., can solve the problems of inconvenient adjustment of the flow-pressure performance curve, achieve high adjustment efficiency, simple adjustment structure, and easy adjustment wide range of effects

Inactive Publication Date: 2005-05-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

[0004] In order to solve the disadvantages of inconvenient adjustment of the flow-pressure performance curve of the various counter-rotating axial flow fans mentioned above, the purpose of the present invention is to provide a counter-rotating axial flow fan with adjustable inlet guide vanes, which can simply and efficiently counter-rotate The performance curve of the axial flow fan is adjusted

Method used

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  • Counter-rotary axial fan with adjustable inlet guide vanes
  • Counter-rotary axial fan with adjustable inlet guide vanes

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Embodiment Construction

[0013] The structure and working principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] See figure 1 , A counter-rotating axial flow fan with adjustable inlet guide vanes, including an air collector 1, which is connected to the first-stage fan outer cylinder 11, the second-stage fan outer cylinder 12 and the diffuser 13 in sequence, and the air collector 1In the shell composed of the first-stage fan outer cylinder 11, the second-stage fan outer cylinder 12 and the diffuser cylinder 13, the first-stage motor 4, the first-stage bucket 6, the second-stage bucket 7 and the second-stage motor 8 are arranged in sequence, the first-stage motor 4 and the second-stage motor 8 are supported by the first-stage fan inner cylinder 3 and the second-stage fan inner cylinder 9 respectively. The first-stage fan inner cylinder 3 is connected to the fairing 2, and the second-stage fan The inner cylinder 9 is connected to the rectif...

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Abstract

A contrarotating axial-flow fan with adjustable guide inlet blade is composed of air gathering unit, the first-stage fan with internal and external barrels, motor and rotary blade wheel, the second-stage for with internal and external barrels, motor and rotary blade wheel, and the adjustable guide inlet blade installed to the internal barrel of the first-stage fan for increasing the regulation range of performance curve.

Description

Technical field [0001] The invention relates to a counter-rotating axial flow fan, in particular to a counter-rotating axial flow fan with adjustable inlet guide vanes. Background technique [0002] The counter-rotating axial fan is a ventilation device widely used in my country's coal mine, railway and highway tunnel engineering. It is compact in size, easy to transport and install, and can achieve high wind pressure and high efficiency. In addition, it is relatively general multi-stage axial flow Fans and counter-rotating axial flow fans also have outstanding reverse wind performance. However, with the use of cyclone fans, such as underground coal mines, railways and highway tunnels, the resistance of the pipe network corresponding to the fan has been changing, which will lead to changes in the operating point of the fan, especially when the resistance of the pipe network changes. When it is larger, the fan will work at a point with very low efficiency, which requires certain a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D19/02F04D29/56
Inventor 李景银
Owner XI AN JIAOTONG UNIV
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