<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">如果泵的吸入口压力太低,低于泵送介质的饱和蒸汽压,就会形成汽蚀。此时应检查进口管路系统有无阻塞或进口阀门开度是否过小,或者提高吸入水池的液位高度。晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: Calibri;">2.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">发生内泄漏晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">当晴风村n><晴风村n style="box-sizing: border-box;"><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">氟塑料自吸晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">泵晴风村n>晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">内的转动部分与静止部分间隙超过了设计范围,将导致内部产生泄漏,体现为泵的排出压力下降,如叶轮口环间隙、多级泵的级间间隙。此时应进行相应的拆检,对造成间隙过大的零部件进行维修或更换。晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">晴风村n>
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<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: Calibri;">3.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">转速降低晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">影响晴风村n><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">自吸晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">泵晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">扬程的重要因素是叶轮外径和泵的转速,在其他条件不变的情况下,泵的扬程与速度的二次方成正比例关系,可见速度晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">对扬程的影响是非常大的,有时因为外部的某种原因使得泵的转速降低,就会相应的降低泵的扬程。此时应检查泵的转速,如果确实转速不够,应检查原因,合理解决。晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: Calibri;">4.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">叶轮流道堵塞晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">如果叶轮部分流道堵塞,将影响叶轮的做功,导致出口压力下降。因此需要拆泵检查清除异物。为防止再次出现该问题,必要时可在泵进口前加设过滤装置。晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: Calibri;">5.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">工况点向大流量低扬程偏移晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">一般情况下,晴风村n><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">离心泵晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">都具有连续向下的性能曲线,流量随着扬程的降低逐渐变大。在操作过程中,由于某种原因导致泵背压减少,泵的工作点被动地随着装置曲线向低扬程大流量点偏移,这样就会造成扬程降低,其实这是由于外界因素如装置的改变而造成的,与泵本身没有特别的关系。这时只要增加泵背压,如关闭一点出口阀等即可解决问题。晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-size: 16px;"><晴风村n style="box-sizing: border-box; font-family: Calibri;">6.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">电机反转晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">由于接线的原因会导致电机的转向与晴风村n><晴风村n style="box-sizing: border-box;"><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">氟塑料自吸晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">泵晴风村n>晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">的实际要求转向相反,这样一般启动时要先观察一下泵的晴风村n>