使泵或鼓风机等转子能达到高转速，大抽量及用于不同的使用条件下。
The rotors of a pump or a blower can reach high rotational speed, and the utility model is used for different use conditions, such as large pumping amount.
分析了罗茨鼓风机轴功率随压差和转速变化的特性，导出了相应的换算公式。
The character on change of the shaft power with the differential pressure or rotational speed for Roots blower is analysed, the conversion formulas for the shaft power are deduced.
煤气鼓风机为适应系统煤气量的变化采用改变风机的转速来进行调节是一有效的节能方法。
Adjustment through changing the blower's rational speed in order to adapt the gas blower to the change of gas amount is an efficient energy-saving method.
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