Counter-rotary axial fan with adjustable inlet guide vanes

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...

AI Technical Summary

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

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