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一、轴向间隙(图1)未经调整或调整不当时严禁起动运行 1.间隙过小:容易引起叶轮与导流壳摩擦,损失功率增加,造成井泵振动,发出噪声,严重时机组难以起动或井泵上跳下窜。此时应立刻停机处理,否则将酿成更大事故。2.间隙偏大:虽然井泵可以长期安全运行,但出水量相应减少,长此下去,很不经济。3.间隙过大:会使叶轮与上导流壳碰撞摩擦,轻则增加能量损失,引起振动,重则起动困难或磨坏叶轮。4.间隙过头:如将叶轮提到最高极限位置后还强行上调,有可能使所有叶轮从泵轴上滑脱,这时必须拆泵检修。二、调试时要严格控制轴向间隙的大小轴向间隙越小,出水量越大,但容易引起叶轮与导流壳摩擦;反之,虽然可以避免摩擦,但出水量减少。据对SD14×3井泵(封闭式叶轮)的实测,当
1, the axial clearance (Figure 1) is not adjusted or improper adjustment is strictly prohibited starting operation 1. Gap is too small: easy to cause the impeller and the diversion shell friction, loss of power increases, resulting in well pump vibration, make noise, serious when the crew difficult Start or pump jump on the channeling. At this point should be immediately shut down, otherwise it will lead to a bigger accident. 2 gap is too large: Although the well pump can be long-term safe operation, but a corresponding reduction in the amount of water, the long run, very uneconomical. 3. Gap is too large: the impeller will collide with the upper diversion shell friction, ranging from increased energy loss, causing vibration, heavy start or impede the wear impeller. 4. Excessive clearance: If the impeller to the highest limit position also forced upward, it is possible to make all the impeller slip from the shaft, then you must disassemble the pump overhaul. Second, the commissioning to strictly control the size of the axial gap The smaller the axial gap, the greater the amount of water, but easily lead to friction impeller and the diversion shell; the other hand, although the friction can be avoided, but the amount of water decreased. According to SD14 × 3 well pump (closed impeller) measured, when