This is directed against structure defect of mine old type tube - axial fan, make technique transform to combine practice, raises main fan running efficiency, receives notable economic benefits.

针对矿井老型号轴流式扇风机的结构缺陷，结合现场实际进行了技术改造，提高了主扇运动效率，收到了显著的经济效益。

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Curved diffuser is an important auxiliary component of main fan installations of mine, whose performance directly influences the operating efficiency of the installations.

扩散弯道是矿井主要通风机装置的重要辅属装置，其性能的优劣直接影响通风机装置的运行效率。

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The diffuser of mine main fan is a device to use reducing velocity pressure of outlet, increase static pressure and recovery kinetic energy.

矿井主扇扩散器是用来降低出口速压以提高风机静压而回收风机出口动能的装置。

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