【摘要】 风机、水泵的正确选择和使用,是提高风机、水泵效率的重要前提。以风机为例,说明了风机、水泵的相似运行关系,提出了满足风机、水泵相似的基本条件和相似后的必然结果。在风机、水泵的调速方式中,变频调速已逐渐成为首选方案,根据风机和水泵的相似定律,在降速过程中,风机、水泵效率不变,其流量、压力(或扬程)、功率分别按转速的1,2,3次方下降。更多还原

【Abstract】 The correct selection and use of fan and pump are the important prerequisite for raising their efficiency.Taking fan as the example the similar operation relations of fan and pump are explained,the essential conditions which must be satisfied for similarity of fan and pump were proposed,and the inevitable results of the similarity were given.The variable frequency speed regulation has become the first scheme to be selected.According to the similarity law of fan and pump,in the process of reducing speed,the efficiency of the fan and pump will be kept at the same value,and its flow rate,pressure(or delivery head) and power are reduced in proportion to speed,speed square and speed cube respectively.更多还原