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水泵在国民经济各各部门中有着广泛的应用,是消耗电能很多的一种机械。据1980年的不完全统计,全国由电动机带动的水泵的总功率约5500万千瓦,占全国电动机总拥有量的四分之一左右,年耗电约600亿度,达全国总用电量的五分之一。由于对离心泵性能缺乏全面的认识,在设计泵站时,往往片面强调保险,不仅根据最大工况加算较多的余量;还考虑可能的发展需要;选泵时又宁大毋小。这样层层加码,造成水泵的性能大大超过装置实际需求的情况是相当普遍的,因
Pumps in various sectors of the national economy has a wide range of applications, is a lot of power consumption of a mechanical. According to the incomplete statistics of 1980, the total power of pumps driven by electric motors in the whole country is about 55 million kilowatts, accounting for about one quarter of the total number of electric motors in the country and annual power consumption is about 60 billion kilowatt-hours, reaching the total electricity consumption in the country one fifth. Due to the lack of a comprehensive understanding of the performance of centrifugal pumps, one-sided emphasis on insurance in the design of pumping stations is not only based on the maximum operating conditions plus more margin; also consider the possible development needs; Such a layer of code, resulting in pump performance greatly exceeded the actual demand of the device is quite common, because