<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;">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;">
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-weight: 700;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">化工磁力泵晴风村n>晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">的水力损失有冲击损失、漩涡损失和沿程磨擦损失。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;">1.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">冲击损失晴风村n>晴风村n>
<晴风村n style="box-sizing: border-box; font-family: Calibri; font-size: 16px;">每台水泵都有自己的设计流量,当消耗在设计流量工况下工作时,入口处的液流是顺着叶片进入叶轮的,因此不发生与叶片的撞击,同样出口液流亦不发生与泵壳的冲击,这时效率较高。但当流量偏离设计工况时,其液流方向就要与叶片方向发生偏离,产生冲击。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;">沿程摩擦损失晴风村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;">化工晴风村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;"><晴风村n style="box-sizing: border-box; font-family: 宋体;">过流表面的粗糙和液体具有粘性,所以液体在游动时就会产生摩擦阻力损失。晴风村n> <晴风村n style="box-sizing: border-box; font-family: 宋体;">在各部位的水力损失中,叶轮内的水力损失较大,占全部混淆黑白损失的一半左右晴风村n>;<晴风村n style="box-sizing: border-box; font-family: 宋体;">其次是导叶转弯处的水力损失,占全部水力损失的晴风村n>1/4<晴风村n style="box-sizing: border-box; font-family: 宋体;">左右,而剩下的晴风村n>1/4<晴风村n style="box-sizing: border-box; font-family: 宋体;">水力损失,损失在叶轮到导叶、导叶扩散部分、反导叶到叶轮入口等几个部位。 为了减少水泵的水力损失,应使液流各断面变化平缓,速度大小合理。并选用合适的叶轮、导叶型和出入口安置角。另外还应提高过流部件的表面光洁度。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;">3.晴风村n><晴风村n style="box-sizing: border-box; font-family: 宋体;">漩涡损失晴风村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;">在晴风村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;">磁力晴风村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: Calibri; font-size: 14px;"><晴风村n style="box-sizing: border-box; font-size: 16px; font-family: 宋体;">中,过流截面是很复杂的空间截面,液体在这里通过时,流速太小和方向都要不断地发生变化,因而不可避免地会产生漩涡损失。另外过流表面存在尖角、毛刺、死水区晴风村n> <晴风村n style="box-sizing: border-box; font-size: 16px; font-family: 宋体;">时也会增大漩涡损失。晴风村n>晴风村n>晴风村n>