【摘要】 分析了影响消防泵引水时间的因素,得出了引水时间与引水泵流量的关系,建立了消防泵引水数学模型,推导了消防泵引水时间的估算公式。估算公式是按照标准大气压推导出来的,当试验气压不是1个标准大气压时,应对估算公式进行修正。当估算公式中高度变量在(7-D/2,7)范围内时,引水时间的计算不适用该公式,但是,由于(7-D/2)~7高度相对很小,而且此时离心泵也具有一定的排气作用,所以这一过程时间很短,对总体计算结果影响不大。3种消防泵引水时间试验的结果表明,用该估算公式计算的结果与实测数据基本吻合,误差不足4%。因此,该估算公式的推导是成功的,对更准确地确定引水泵参数,设计出合理的消防泵有实用意义。更多还原

【Abstract】 The factors affecting fire pump′s water suction time were analyzed.A relationship for water suction time and pump flow was obtained.A mathematic model for the fire pump′s water suction time was established.The formula is derived.From 3 kinds of fire pump′s water suction experiments,it shows that this formula is successful and viable to make fire pump′s parameters more accurate.It is also very meaningful for designing a useful and reasonable fire pump.更多还原