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一、前言目前,泵的节能问题已引起国内外人们的极大重视。首先,从泵的产量上看,生产数量很大,在1955年至1979年的25年中,全国仅工业泵(其中包括高压泵和特殊泵)就生产了349.03万台。而1979年一年内,全国工业泵的产量为32.22万台,农业泵的产量为66.69万台;从泵的使用来看,泵应用于工农业各个部门,例如农业排灌用泵,矿井排水泵,城市供水
I. Introduction At present, the issue of pump energy conservation has drawn great attention from people both at home and abroad. First of all, from the perspective of pump production, the production volume is very large. Between 25 years from 1955 to 1979, there were only 3,490,300 industrial pumps (including high-pressure pumps and special pumps) in the country. In one year in 1979, the output of industrial pumps in the country was 322,200 units and the output of agricultural pumps was 666,900 units. From the perspective of pump use, the pump was used in various sectors of agriculture and industry, for example, pumps for agricultural irrigation and drainage, drainage pumps for mines, City water supply