拆卸如图1所示的单级离心泵。首先是松开泵体和轴承体的连接螺母,将轴承体b从泵体1中拉出,然后用扳手或专用工具松开叶轮螺母4,接着拆卸叶轮。由于离心泵的特性,决定了比转数n_s不可能很大,另外设计时考虑水力损失的问题,导致了叶轮出口宽度b和叶轮后盖板与轴承体处的B尺寸间距很小。因而使用的三爪、两爪拉拔器,其勾爪根本无法伸入B和b内,拉拔器失去了作用。对于混流式离心泵,比转数n_s虽较大,b也较宽,偶而一些两爪或三爪的勾爪也能伸进,但由于叶轮前后盖板E较薄使用现有的拉拔器,又往往会发生拉破叶轮的现象。因而,迄今为止,拆卸离心叶轮大多都是用两根铁杆插入到轴承体6和离心叶轮3之间的B中撬出叶轮。或用鎯头敲打泵轴的A处,使轴产生后移,从而拆出叶轮,这种方式即笨又破坏了泵本身的精度。针对这种 Disassemble the single-stage centrifugal pump shown in Figure 1. First, loosen the coupling nut of the pump body and the bearing body, pull the bearing body b out of the pump body 1, then loosen the impeller nut 4 with a wrench or a special tool, and then remove the impeller. Due to the characteristics of the centrifugal pump, it is impossible to determine the specific rotational speed n_s. In addition, the hydraulic pressure is taken into consideration in the design, which results in a very small clearance b between the impeller exit width b and the impeller rear cover and the bearing body. Thus the use of the three claws, two claw puller, the hook can not reach into the B and b, the puller lost its effect. For the Francis centrifugal pump, although the specific speed n_s is larger, b is wider, and occasionally some two or three claw claws can extend into, but because of the thin front and rear cover E of the impeller using the existing puller, Pursuit of the impeller often happens. Therefore, to date, most of the demounting centrifugal impellers have been pruned out of the impeller by inserting the two iron rods into B between the bearing body 6 and the centrifugal impeller 3. Or hit the pump with a stirrup head A Department, the shaft produced after the shift, which took out the impeller, this way that stupid and destroyed the pump itself accuracy. For this