G4-73锅炉风机-鼓风机-适用于火力发电厂中2~670T/h蒸气锅炉的鼓风机系统。在无其它特殊要求时，G4-73亦可用于矿井通风及一般通风。
鼓风机输送的介质为空气，最高温度不得超过80℃;引风机输送的介质为烟气，温度不得超过250℃。鼓风机有№8~28共12个机号。
风机主要由叶轮、机壳、进风口、调节门及传动部分组成。
叶轮：由12片后倾机翼斜切的叶片焊接于弧锥形的前盘与平板形的后盘中间。同一号的通、引风机叶轮结构相同。
机壳：机壳是用普通钢板焊接而成的蜗形体。单吸入风机的机壳作成三种不同形式：№8~12机壳作成整体结构，不能拆开。№14~16机壳作成两开式。№18~28机壳作成三开式。对引风机、蜗形板作了适当加厚以防磨。G4-73锅炉风机-鼓风机
进风口：收敛、流线型的进风口制成整体结构，用螺栓固定在风机入口侧。
调节门：用以调节风机流量的装置，轴向装在进风口前面。调节范围由0°(全开)到90°(全闭)
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